From compgeom-owner@research.bell-labs.com  Sun Jun 14 06:12:43 1998
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To: compgeom-announce@research.bell-labs.com
cc: cmh@cs.purdue.edu
Subject: ARO Job Opening
Date: Fri, 12 Jun 1998 22:48:31 -0500
From: cmh@cs.purdue.edu ("Christoph M. Hoffmann")
Precedence: bulk
Status: RO


Dear Colleagues,

The Army is advertising to fill the position of Program Manager for Discrete 
Mathematics and Computer Science at ARO.  This position was formerly held by 
Ming Lin.  If you know of any colleagues or students who would be interested 
in this job, please let them know about it.  Applications will be accepted 
until July 31, 1998.

To find out more about this position, go to the ARO web site, 

http://www.aro.army.mil/ 

click on employment and then navigate through the Army Civilian Personnel web 
site.  Alternatively, the announcement can be found at:

http://www.cpol.army.mil/vacancy/va_get.cgi?ViewJob=D26498.dat

Sincerely,
Stephen Davis 
Army Research Office



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From compgeom-owner@research.bell-labs.com  Mon Jun 15 21:43:29 1998
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To: compgeom-announce@research.bell-labs.com
From: Vadim Shapiro <vshapiro@me.engr.wisc.edu>
Subject: CFP - special issue of  Computer-Aided Design
Precedence: bulk
Status: RO

 
                             CALL FOR PAPERS

                   Special Issue of  Computer-Aided Design

        Geometric Programming: Languages and Interfaces

                              Guest Editors:
                    Graham Jared, Cranfield University
                 Vadim Shapiro, University of Wisconsin

          Deadline for Submission of Full Papers: 28 August 1998
                     Expected Publication: March 1999


The specification, construction, query, transformation and exchange of 
geometric information are common programming activities in many areas of 
computing, with numerous applications across engineering, the sciences, 
and beyond.  Progress in 'geometric programming' is documented in the 
literature and demonstrated in commercial systems.

However, geometric programming is still inhibited by unresolved problems 
in interfacing and exchanging geometric data and algorithms, which are 
compounded by factors such as incompatible models and assumptions, legacy 
data, and the adoption of case-by-case solutions.  These difficulties are 
somewhat similar to the challenges that have been faced in other areas of 
computing over the last twenty years.  Indeed, software engineering 
concepts, including portability of applications, plug-and-play software, 
and standardized application programming interfaces have been advocated as 
partial solutions to the interface problem in geometric programming; 
familiar results of this approach include kernel modellers and 
component-based CAD systems.  However, more profound interoperability of 
geometric systems requires formal frameworks for defining common syntax 
and semantics of geometric constructs and operations which are largely 
independent of specific representations.

This special issue will contain papers presenting new research results in 
topics including, but not limited to:

*  Advantages and limitations of existing methods in geometric 
   programming, and the theoretical and practical barriers to further 
   progress.
*  New abstractions and techniques for geometric programming.
*  General principles for designing and constructing geometric languages 
   and interfaces.
*  Formal methods for defining the syntax and semantics of geometric 
   programs.
*  Spatial (geometric, topological, and combinatorial) abstractions and 
   models, and their applications in geometric programming.
*  Specification, design and implementation of application-specific 
   languages, toolkits, and environments: in areas such as design and 
   manufacture, robotics, architecture, and scientific visualization.

Well-researched survey papers are also particularly welcome.

All papers will be refereed.  Authors should consult the "Notes for 
Authors", which are printed at the back of most issues of Computer-Aided 
Design, for information about preparation of their manuscripts.  Papers 
of an appropriate standard which are not included in the special issue may 
be considered for publication in a regular issue of Computer-Aided_Design.

Please submit papers to:

                               Graham Jared
              School of Industrial and Manufacturing Science
                               Building 50
                           Cranfield University
                                Cranfield
                                 Bedford
                                 MK43 0AL
                                   U K

                           Fax: +44-1234-750875
                     E-mail: g.jared@cranfield.ac.uk

Or to:

                              Vadim Shapiro
                   Department of Mechanical Engineering
                    University of Wisconsin - Madison
                          1513 University Avenue
                                 Madison
                              WI 53706-1572
                                  U S A

                           FAX +1-608-265-2316
                      E-mail: vshapiro@engr.wisc.edu

===============================================================================



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From compgeom-owner@research.bell-labs.com  Fri Jun 19 16:27:28 1998
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Date: Thu, 18 Jun 1998 13:06:23 -0400 (EDT)
From: CCCG 98 <cccg98@jeff.CS.McGill.CA>
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To: compgeom-announce@research.bell-labs.com
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------------------------------------------------------------------------

       Tenth Canadian Conference on Computational Geometry

                    Call for participation

------------------------------------------------------------------------
McGill University, Montreal, Canada, August 10-12, 1998
URL: http://cgm.cs.mcgill.ca/cccg98
E-mail: cccg98@cgm.cs.mcgill.ca

The Tenth Canadian Conference on Computational Geometry (CCCG '98) will be
held at McGill University, Montreal, Canada, August 10 - 12, 1998.  The
symposium is a forum for researchers, practitioners, developers and users
working on all aspects of computational geometry.  The list of papers to be
presented at the conference is available on our web site at
http://cgm.cs.mcgill.ca/cccg98.

There is no registration fee.  However, we ask that you register as soon as
possible if you are attending, as we are planning a welcoming dinner-reception.
In addition, we will be printing only as many copies of the proceedings as we
have registrants.

Registration is available online on our web site at
	http://cgm.cs.mcgill.ca/cccg98

CCCG '98 precedes the 6th Annual Symposium on Graph Drawing, August 13-15,
1998, also to be held at McGill University.  See http://gd98.cs.mcgill.ca

Organizing/Programming Committee:

   * David Avis
   * Therese Biedl
   * Luc Devroye
   * Sylvain Lazard
   * Godfried Toussaint
   * Sue Whitesides

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From compgeom-owner@research.bell-labs.com  Wed Jun 24 16:31:50 1998
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From: "pdwyer" <pdwyer@Rational.Com>
To: <compgeom-announce@research.bell-labs.com>, <sigcse.members@acm.org>,
        <theory-a@listserv.nodak.edu>
Subject: Career Openings at Rational Software
Date: Mon, 22 Jun 1998 14:57:31 -0400
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Rational Software is the world's leading provider of software =
development tools and services that automate the component-based =
development of software applications. This major industry trend has been =
embraced by the largest software suppliers such as Microsoft, Oracle and =
IBM - providing us with annual growth up to 47% and a global presence.
=20
Referrers of successful applicants and successful applicants usually get =
cash rewards. Send all resumes to pdwyer@rational.com  or mail to: Paul =
Dwyer c/o Rational Software 8521 Six Forks Rd. Suite 200, Raleigh NC =
27615.
=20
These positions are in our Automated Test Business Unit in Raleigh, NC.
=20
Senior Software Engineers:
In these positions with our client/server protocol engineering team =
you'll help develop record and playback technology for our Load Testing =
R&D organization. Both require a BS/MS CS/EE or equiv. , 3+ years of =
C/C++ software development in Unix or WindowsNT, experience with =
transaction monitors such as Tuxedo and MTX, plus the ability to design, =
implement and unit test significant projects, largely on your own. Other =
desireables include:
- client-side data base API programming
- system-level programming such as drivers and kernals
- familiarity with SQL language and database design
- experience with network protocols like TCP/IP
- experience with DCOM/DCOM+, CORBA, IIOP, etc.
=20
QA Test Engineers
Working with the development team, you will participate in the QA =
activities for WindowsNT and Unix load testing products. =
Responsibilities include developing test plans, requirements and =
automated suites. Requires a BSCS\EE or equiv. with 2+ years in software =
testing, and 1+ with QA and test tools. Familiarity with C, shell =
scripting, formal testing methods and attention to detail also needed. =
Network, SQL, API, protocol and database experience a plus.
=20
Principal Technical Writer
You will create an online help framework, online videos, multimedia =
projects, and web documents; write help text, perform peer edits, =
provide artwork and screen captures as needed and do other production =
related duties. You'll also write manuals, plan, organize, schedule and =
coordinate other documentation; and interface with other departments and =
sites. Requires knowledge of client/server technology, Microsoft =
Windows, Microsoft Word, Windows 80K Help Compiler or RoboHelp and a =
graphics package like CorelDraw. Knowledge of programming languages, =
database, HTML and SGML converters a plus.
=20

=20

------=_NextPart_000_0093_01BD9DEE.14BE3930
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>

<META content=3Dtext/html;charset=3Diso-8859-1 =
http-equiv=3DContent-Type><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 =
HTML//EN">
<META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV>&nbsp;</DIV>
<DIV><FONT size=3D2>Rational Software is the world's leading provider of =
software=20
development tools and services that automate the component-based =
development of=20
software applications. This major industry trend has been embraced by =
the=20
largest software suppliers such as Microsoft, Oracle and IBM - providing =
us with=20
annual growth up to 47% and a global presence.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Referrers of successful applicants and successful =
applicants=20
usually get cash rewards. Send all resumes to <A=20
href=3D"mailto:pdwyer@rational.com">pdwyer@rational.com</A>&nbsp; or =
mail to: Paul=20
Dwyer c/o Rational Software 8521 Six Forks Rd. Suite 200, Raleigh NC=20
27615.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>These positions are in our Automated Test Business =
Unit in=20
Raleigh, NC.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Senior Software Engineers:</FONT></DIV>
<DIV><FONT size=3D2>In these positions with our client/server protocol =
engineering=20
team you'll help develop record and playback technology for our Load =
Testing=20
R&amp;D organization. Both require a BS/MS CS/EE or equiv. , 3+ years of =
C/C++=20
software development in Unix or WindowsNT, experience with transaction =
monitors=20
such as Tuxedo and MTX, plus the ability to design, implement and unit =
test=20
significant projects, largely on your own. Other desireables=20
include:</FONT></DIV>
<DIV><FONT size=3D2>- client-side data base API programming</FONT></DIV>
<DIV><FONT size=3D2>- system-level programming such as drivers and=20
kernals</FONT></DIV>
<DIV><FONT size=3D2>- familiarity with SQL language and database=20
design</FONT></DIV>
<DIV><FONT size=3D2>- experience with network protocols like =
TCP/IP</FONT></DIV>
<DIV><FONT size=3D2>- experience with DCOM/DCOM+, CORBA, IIOP, =
etc.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>QA Test Engineers</FONT></DIV>
<DIV><FONT size=3D2>Working with the development team, you will =
participate in the=20
QA activities for WindowsNT and Unix load testing products. =
Responsibilities=20
include developing test plans, requirements and automated suites. =
Requires a=20
BSCS\EE or equiv. with 2+ years in software testing, and 1+ with QA and =
test=20
tools. Familiarity with C, shell scripting, formal testing methods and =
attention=20
to detail also needed. Network, SQL, API, protocol and database =
experience a=20
plus.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Principal Technical Writer</FONT></DIV>
<DIV><FONT size=3D2></FONT><FONT color=3D#000000 size=3D2>You will =
create an online=20
help framework, online videos, multimedia projects, and web documents; =
write=20
help text, perform peer edits, provide artwork and screen captures as =
needed and=20
do other production related duties. You'll also write manuals, plan, =
organize,=20
schedule and coordinate other documentation; and interface with other=20
departments and sites. Requires knowledge of client/server technology, =
Microsoft=20
Windows, Microsoft Word, Windows 80K Help Compiler or RoboHelp and a =
graphics=20
package like CorelDraw. Knowledge of programming languages, database, =
HTML and=20
SGML converters a plus.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV></BODY></HTML>

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From compgeom-owner@research.bell-labs.com  Fri Jun 26 15:48:15 1998
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Subject: Minutes of SoCG Business Meeting
To: compgeom-announce@research.bell-labs.com
Date: Thu, 25 Jun 1998 17:30:44 -0400 (EDT)
Cc: clarkson@research.bell-labs.com (Ken Clarkson)
Content-Type: text
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Minutes of SoCG Business Meeting
7 June 1998, Minneapolis, MN, USA


   Throughout this document, SoCG stands for the ACM Symposium on 
Computational Geometry.  The business meeting was conducted by Mark Overmars, 
Chair of the SoCG Steering Committee.


1.  Reports on 14th SoCG (1998)

Ravi Janardan reported that there were approximately 140 registrants 
for the conference, including 30 students. The Program Chairs reported 
the following submissions and acceptances:

     ________________________________________________________________
     | Track      |Program Chair  |Comm. Members||Submittd|Accepted |
     |____________|_______________|_____________||________|_________|
     | Applied    |Jarek Rossignac|     15      ||    53  |    19   |
     | Theoreticl |Ken Clarkson   |     11      ||    57  |    25   |
     | Total      |               |   26        || 110    |  44     |
     | Video      |Dan Halperin   |      7      ||    10  |     7   |
     |____________|_______________|_____________||________|_________|

Ken Clarkson noted that all but three theory track submissions were 
sent via email, using the SIGACT server, and all but one accepted paper 
was sent using the SIGACT server.



2. 15th SoCG (1999):  Miami Beach

Victor Milenkovic, 1999 Conference Chair, detailed the plans for the 
15th annual conference, to be held June 13-16 on Miami Beach, FL, USA. 
The rooms at the Radisson Hotel are $98+tax per night. The Program Chairs 
for the applied and theoretical tracks are John Canny and Marshall Bern 
respectively. Jeff Erickson will chair the Video Review.


3. 16th SoCG (2000):  Hong Kong

Two bids were offered: Hong Kong (Otfried Cheong [ne Schwarzkopf] and
Siu-Wing Cheng) and Israel (Klara Kedem). After a discussion of both 
options, a vote was taken, with Hong Kong favored by the majority 
(50 vs. 31). Although the airfares are expensive (currently $700-$800 
US/Canada-Hong Kong; $1200 Europe-Hong Kong), lodging costs and registration 
fees are expected to lower the total cost toward comparability with a 
North American site.


4. 17th SoCG (2001)

There was a discussion of attempting to co-locate with another relate
d conference in 2001, and the Steering Committee was given freedom to 
investigate possibilities and report back to the community.


5. e-Print Archives

I informed the community that the Los Alamos LANL e-Print archive 
(http://xxx.lanl.gov) is expanding into Computer Science [it started 
in Physics in the early 1990's, and has since expanded into Mathematics],
and that I volunteered to Joseph Halpern (Cornell), who chairs a committee 
on this topic, to help moderate in computational geometry.  The response at 
the meeting was enthusiastic, with the only cautionary note concerning 
whether computational geometry papers will have a natural category, or will 
it be so fractured across classification boundaries that focus will be 
difficult.

   Subsequent to the business meeting, this issue has advanced in two
ways.  First, Jeff Erickson has volunteered to share the moderator duties 
with me. Second, I have written to Joe Halpern to convey the community's 
concern on categorization, and he is very sympathetic, and hopes that this 
can be addressed by, e.g., filtering mailing lists by keyword.


6.  Procedures

Mark Overmars walked through a number of points from a SoCG Procedures
document he drafted, an attempt to make explicit how we intend to run 
the conference in the future.

  1. Conference format: Four days, two nonparallel tracks (applied and
     theoretical), 50-60 total presentations of 20-25 minutes each. No 
     short communications.


  2. Two program committees, whose chairs are selected by the Steering
     Committee. Recommended 6-8 committee members for each track.


  3. Ten-page abstracts submitted to a particular track. No submissions
     by program committee members to their own track (but they may submit 
     to the other track).


  4. The selection process should be essentially the same for both tracks:
     same deadlines, same guidelines, same committee size, same type of 
     feedback to authors, either both have a committee meeting or both run 
     the selection electronically, etc.


  5. No track switches after reviewing, but the two chairs should try
     to meet early on and move papers (with permission of the authors) to 
     the other track if they deem it appropriate.


Various people spoke for or against specific points, but the basic outline--
emphasizing continuation of this year's format coupled with uniformity and 
collaboration between the two tracks--was accepted.

      Joseph O'Rourke,
      Secretary of the SoCG Steering Committee. orourke@cs.smith.edu.


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To: general@eg.org
Subject: Eurographics'98 Reminder
Date: Mon, 29 Jun 1998 18:39:36 +0200
From: Joaquim A Jorge <Joaquim.Jorge@inesc.pt>
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Status: RO


			REMINDER
			--------
		

	       Early registration for Eurographics'98 ends June 30. To benefit
from reduced rates, your registration form must be RECEIVED before July 1st.

	For further information on the conference and on how to register,
consult the conference Web site at:

	http://www.eg98.gpcg.pt/registration

Or contact registration@eg98.gpcg.pt




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From compgeom-owner@research.bell-labs.com  Mon Jul  6 16:15:00 1998
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Date: Thu, 02 Jul 1998 17:25:19 +0200
From: Pedro Ramos <pramos@fi.upm.es>
Subject: Data for roundness algorithms
To: compgeom-discuss@research.bell-labs.com
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Hello, 

I am trying to compare different algorithms for measuring
roundness 
of objects in 2D and 3D. I have been doing some experiments with 
simulated data, but it would be nice to work on REAL data. 

Unfortunately, such real data seem to be difficult to get,
because
CMS's (machines measuring properties of the objects) are usually 
''black boxes''. 

Does anybody has any pointer about where I can get such data?

Thank you very much in advance

Pedro Ramos


-- 
****************************************************************
Pedro A. Ramos                   http://www.dma.fi.upm.es/pramos
Dpto. Matemática Aplicada                email: pramos@fi.upm.es
Facultad de Informática                    phone: (34) 913367424
28660 Boadilla del Monte                     fax: (34) 913367422
Madrid (SPAIN)
****************************************************************

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From compgeom-owner@research.bell-labs.com  Mon Jul  6 16:27:32 1998
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cc: goodrich@cs.jhu.edu
Subject: ALENEX 99
Date: Fri, 03 Jul 1998 16:47:58 -0400
From: "Michael T. Goodrich" <goodrich@michigan.cs.jhu.edu>
Precedence: bulk
Status: RO


 		CALL FOR PAPERS
		   ALENEX99

Workshop on Algorithm Engineering and Experimentation 

                 January 15-16, 1999 
          Omni Hotel,  Baltimore, Maryland

The first Workshop on Algorithm Engineering and Experimentation 
(ALENEX99) is sponsored by DIMACS, the Center for Discrete Mathematics
and Theoretical Computer Science, with additional support from SIAM. 
This workshop will be immediately before SODA 99, which will be held in
the same location.

The aim of ALENEX99 is to provide a forum for the presentation 
of original research in the implementation and experimental 
evaluation of algorithms and data structures.  Papers are invited 
which present significant case studies in experimental analysis 
(which may tighten, extend, or otherwise improve current 
theoretical results), or in the implementation, testing, and 
evaluation of algorithms for realistic environments and scenarios.  
We also invite papers that address methodological issues and standards 
in the context of empirical research on algorithms and data structures.  

The scientific program will include invited talks as well as 
contributed research papers, and will include time for discussion 
and debate of topics in this rapidly evolving research area.  It is 
planned to publish the proceedings of ALENEX99 as a volume of the 
Springer Lecture Notes in Computer Science series. 

This workshop is colocated with SODA '99 and will be held on the
two days preceeding that conference.  A (10-page or 2-page) paper 
which has been reviewed and accepted for presentation at SODA is 
not eligible for submission to ALENEX.  However we recognize 
that some research projects spawn multiple papers that elaborate on 
different aspects of the work, and we are willing to respond to 
inquiries about overlapping papers.  

Authors are invited to submit 10-page extended abstracts to the 
organizers by SEPTEMBER 11, 1998.  For physical submissions,
send 10 copies of the extended abstract to:

	Catherine C. McGeoch
 	Department of Mathematics and Computer Science
	Amherst College
	Amherst,  MA 01002

Instructions about electronic submissions will appear at our 
conference website: http://www.cs.jhu.edu/Conferences/ALENEX99/  

Extended abstracts will be made available to participants at the 
workshop.  The deadline for submission of full papers for publication
in the proceedings is JANUARY 15, 1999.  

The ALENEX Workshop is intended to alternate in future years with the 
(European) ALEX conference.  The last ALEX meeting was ALEX98, and
the next is planned for the year 2000.  


PROGRAM COMMITTEE:

Richard Anderson
	University of Washington, Seattle, WA 

Roberto Battiti
	University of Trento, Trento, Italy 

Michael Goodrich,  Co-chair
	Johns Hopkins University, Baltimore MD 

Giuseppe F. Italiano 
         Universita Ca Foscari di Venezia, Italy  

Davis S. Johnson
	AT&T Labs, Florham Park, NJ 

David R. Karger
	MIT, Cambridge, MA 

Catherine C. McGeoch, Co-chair
	Amherst College, Amherst, MA 

Steve Skienna
	SUNY Stony Brook, NY 

Roberto Tamassia
	Brown University, Providence, RI  


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From compgeom-owner@research.bell-labs.com  Mon Jul  6 16:32:44 1998
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From: "Joseph S. B. Mitchell" <jsbm@math.tau.ac.il>
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Date: Sun, 5 Jul 1998 08:31:32 +0300 (GMT+0300)
Message-Id: <199807050531.IAA15391@lune.math.tau.ac.il>
To: compgeom-announce@research.bell-labs.com
Subject: CFP: Solid Modeling'99
Precedence: bulk
Status: RO


Please note that Solid Modeling'99 and the SoCG'99
have been scheduled next year in order not to overlap;
in fact, we want to encourage computational geometry
participation in the Solid Modeling conference!

   SoCG'99:  June 13-16, 1999   (Miami)
   Solid Modeling'99:  June 9-11, 1999  (Ann Arbor)




Best,

Joe Mitchell


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

                        *********************
                        *  CALL FOR PAPERS  *
                        *********************

              *****************************************
              *                                       *
              *          SOLID MODELING '99           *
              *                                       *
              *         FIFTH ACM SYMPOSIUM ON        *
              *    SOLID MODELING AND APPLICATIONS    *
              *                                       *
              *****************************************


           Sheraton Inn, Ann Arbor, Michigan, June 9-11, 1999

                     Sponsored by ACM SIGGRAPH

This symposium provides an international forum for the exchange of recent
research and practical results in all areas and applications of solid
modeling. Emphasis is on solid modeling in design, analysis and
manufacturing. Previous symposia in this series (Austin, Texas, 1991,
Montreal, Canada, 1993, Salt Lake City, Utah, 1995, and Atlanta, Georgia,
1997) brought together the most prominent researchers, key practitioners,
and numerous students in the field.

In 1999, the symposium will have several new features, including:
  * tutorials on June 8
  * panel sessions
  * ACIS Best Paper Award, sponsored by Spatial Technology Inc.
  * sponsorship by ONR of undergraduate students to attend the symposium.

More information on the symposium, as it becomes available, can be found on
the Solid Modeling '99 WWW page at:

  http://www.engin.umich.edu/dept/meam/deslab/cadcam/ACMSM/

If you do not have access to the WWW, you can request a copy of this page
by sending an email to dutta@engin.umich.edu.

The schedule for submission of papers is as follows:

September 30, 1998:   Abstracts due
October   30, 1998:   Full papers due
January   31, 1999:   Notice of acceptance and reviewers' comments
February  28, 1999:   Final camera-ready papers and extended abstracts due

For details on how to submit abstracts and papers, please consult the WWW 
page.

Abstracts are used to facilitate the review process, and should be 150-300
words long.

Papers should be at most 12 normally typeset pages, including figures and
references, and should present previously unpublished original results.

Papers will be peer-reviewed and can be selected for presentation at a
plenary session with publication in the conference proceedings published by
ACM Press, or presentation at a poster session with publication of an
extended two-page abstract in the conference proceedings.

A revised version of a number of selected papers will also be published in
a special issue of the journal Computer-Aided Design.

The ACIS Best Paper Award of $1500, sponsored by Spatial Technology Inc.,
will be awarded by a jury.

Video and other special equipment will be available for presentations when
requested.

Topics for papers include, but are not limited to:

 1) Geometric and topological representations
 2) Multiresolution models
 3) Heterogeneous models
 4) Geometric interrogations and reasoning
 5) Computational geometry relevant to modeling
 6) Robustness of geometric computations
 7) Blends, sweeps, offsets, deformations and other constructional methods
 8) Procedural, constraint-based and parametric modeling
 9) Modeling families of geometric objects
10) Feature-based modeling
11) Conceptual design techniques
12) Product modeling
13) Assembly modeling
14) Representation conversion
15) Product data exchange
16) User interaction techniques
17) Collaborative/distributed design
18) Virtual environments and prototypes
19) Reverse engineering
20) Engineering analysis, including FE mesh generation
21) Engineering tolerances
22) Manufacturing and assembly planning
23) Computational support for new manufacturing technologies

General Chair
-------------
  Deba Dutta, University of Michigan

Financial Chair
---------------
  Ming Lin, University of North Carolina

Program Co-Chairs
-----------------
  Wim Bronsvoort, Delft University of Technology
  David Anderson, Purdue University

Program Committee
-----------------
  Adrian Bowyer, University of Bath
  Beat Bruderlin, Technical University of Ilmenau
  Pere Brunet, Polytechnic University of Catalonia
  Richard Crawford, University of Texas
  Gershon Elber, Technion
  Bianca Falcidieno, CNR Italy
  Mark Henderson, Arizona State University
  Chris Hoffmann, Purdue University
  Fumihiko Kimura, University of Tokyo
  R\"udiger Klein, Daimler Benz
  Kunwoo Lee, Seoul National University
  Remi Lequette, ILOG
  Dinesh Manocha, University of North Carolina
  Martti M\"antyl\"a, Helsinki University of Technology
  Jai Menon, IBM Research
  Jim Miller, University of Kansas
  Joseph Mitchell, SUNY Stony Brook
  Nick Patrikalakis, MIT
  Mike Pratt, Rensselaer/NIST
  Ari Rappoport, Hebrew University
  Jarek Rossignac, Georgia Institute of Technology
  Vadim Shapiro, University of Wisconsin-Madison
  George Turkiyyah, University of Washington
  Tamas Varady, Hungarian Academy of Sciences
  Kevin Weiler, Autodesk
  John Woodwark, Information Geometers

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From compgeom-owner@research.bell-labs.com  Wed Jul  8 15:55:41 1998
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	Tue, 7 Jul 1998 10:46:50 -0400 (EDT)
Date: Tue, 7 Jul 1998 10:46:48 -0400 (EDT)
From: "Therese C. Biedl" <therese@jeff.CS.McGill.CA>
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To: DMANET@math.utwente.nl, THEORYNT@LISTSERV.NODAK.EDU,
        compgeom-announce@research.bell-labs.com
Subject: GD'98 - Final Call for Posters - Due July 15th
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                    Final call for POSTERS
                   Deadline: July 15, 1998

                       Graph Drawing '98

              McGill University, Montreal, Canada, 
                       August 13-15, 1998.
                 URL: http://gd98.cs.mcgill.ca
                 email: info@gd98.cs.mcgill.ca

The paper submission deadline for GD '98 has now passed, and the list of
accepted papers is available at the above Web site. However, poster
submissions for GD '98 are still welcome.

Graph Drawing '98 (GD '98) will be held at McGill University, Montreal,
Canada, August 13 - 15, 1998. The symposium is a forum for researchers,
practitioners, developers and users working on all aspects of graph drawing.

GD '98 follows the 10th Canadian Conference on Computational Geometry,
August 10-12, 1998, held at McGill University. See
http://cgm.cs.mcgill.ca/cccg98.

Call for Posters: Submissions of posters in graph drawing and related areas
are solicited. The purpose of posters is to provide a forum for the
communication of results to the graph drawing community. These posters may
contain results that have appeared or will appear elsewhere. They may also
pose open problems of interest to the graph drawing community.

To increase the interaction between graph drawing and other areas, posters
that present topics related to graph drawing in fields such as cartography,
chemistry, computational biology, geographic information systems, graphics,
perception and vision, scientific visualization, and software engineering
are particularly encouraged.

To allow for questions and discussion, at least one author of each poster is
expected to be present at the conference.

Proceedings: The proceedings of GD '98 will be published in the
Springer-Verlag Lecture Notes in Computer Science series. These proceedings
will contain a Poster Gallery Report, with a 1-2 page abstract per poster.
The camera-ready version of this abstract is due at the conference. To
prepare your hard copy, please follow the directions for authors in the LNCS
series of Springer-Verlag. These directions are available at the LNCS
homepage.

Submission: To submit a poster, send a 1-2 page abstract by email (in
postscript, LaTeX, or plain text) or as hard copy to the Poster Chair


                 Therese Biedl
                 School of Computer Science
                 McGill University
                 3480 University Street #318
                 Montreal, Quebec H3A 2A7, Canada
                 email: therese@cs.mcgill.ca

Important dates:
Submissions: July 15, 1998.
Final version: August 15, 1998.

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Nancy Amato suggested that I post this inquiry to this news group.  I hope
you don't mind this inquiry.  It has been my experience that it is better to
ask for insight versus experiencing it directly once you have gone down a
blind alley with an algorithm development.

I am planning a development that involves the placement of 2D circles in a
restricted area.  I would appreciate any leads you may have with regard to a
similar study or project at a University.

The best way to describe the development is to imagine a cluster of
balloons.  Each balloon has a fixed (equal) diameter and has an elastic
string tied to it.  The other end of the string is tied to an origin point.
Each balloon's origin is spaced from another's origin in an arbitrary
pattern.  The origin to origin spacing is typically less than the diameter
of a balloon, so a balloon can't be placed over its origin without pushing
the adjacent balloons off their origins.  The object of the development is
to bring all the balloons as close to their origins as possible (minimizing
the tension of the elastic string) with each balloon just touching.

I have two fairly straight forward approaches, but frequently they do not
represent the best way to solve the problem.  One would simply explode the
balloons from a geometric center beyond any possible intersection with the
other balloons.  Then it would use the elastic string to pull the balloons
back as close as possible to the respective origin never allowing overlap
while doing the pull back.  The other would start with each balloon at its
origin and then working from computed overlap forces move the balloons until
no overlap occurs.  I would be very interested in any suggestions you might
have of similar research I could review.

Thank you for listening, and please excuse the intrusion.


|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|Bud Curtis                Bud@CurtisCAE.cnchost.com
|Curtis CAE Consultants
|15065 Herring Road
|Colorado Springs, CO  80908    (719)495-8266
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Custom Database & Information Processing for
| the Design & Manufacturing Industry
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



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     Sixth SIAM Conference on Geometric Design 
     November 2-5, 1999
     Sheraton Old Town Hotel
     Albuquerque, New Mexico
     
     SIAM and the Organizing Committee for the Sixth SIAM Conference 
     on Geometric Design are pleased to announce that the conference 
     Call for Papers is now available on the Web. To know more about 
     the conference themes, invited plenary speakers, minisymposia, 
     and deadlines for submission of minisymposium proposals or 
     contributed abstracts, please visit now --
     
                       www.siam.org/meetings/gd99/
     
     or contact:
     Trini Flores
     flores@siam.org
     meetings@siam.org
     



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Dear readers:

I'd like to announce that after a long pregnancy of 9 months, the 
tribune is getting into shape for a new issue. It's not going to be 
premature, but please send me your contributions:

  o call for papers, announcements for the agenda
  o a report on a conference, workshop, or seminar that you attended
  o if you have organized an event, you must have written a report
    also; consider contributing this report to the tribune
  o a short contribution (1 column) on some problems that you have
    been looking at lately; very welcome are problems involving
    multiple disciplins (e.g. geometry and graphics, vision, shape
    reconstruction, manufacturing, robotics, astrophysics or molecular
    biology)
  o open question you never found the answer of (don't be shy!)
  o anything you would like to see in the CG Tribune

Your friendly editor,

Herve Bronnimann.
http://www.inria.fr/prisme/personnel/bronnimann/cgt/
---
Herve



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From compgeom-owner@research.bell-labs.com  Wed Jul 22 04:23:36 1998
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Date: Fri, 10 Jul 1998 17:29:26 +0200
From: Herve Bronnimann <Herve.Bronnimann@sophia.inria.fr>
Status: RO

Dear readers:

I'd like to announce that after a long pregnancy of 9 months, the 
tribune is getting into shape for a new issue. It's not going to be 
premature, but please send me your contributions:

  o call for papers, announcements for the agenda
  o a report on a conference, workshop, or seminar that you attended
  o if you have organized an event, you must have written a report
    also; consider contributing this report to the tribune
  o a short contribution (1 column) on some problems that you have
    been looking at lately; very welcome are problems involving
    multiple disciplins (e.g. geometry and graphics, vision, shape
    reconstruction, manufacturing, robotics, astrophysics or molecular
    biology)
  o open question you never found the answer of (don't be shy!)
  o anything you would like to see in the CG Tribune

Your friendly editor,

Herve Bronnimann.
http://www.inria.fr/prisme/personnel/bronnimann/cgt/
---
Herve


From compgeom-owner@research.bell-labs.com  Fri Jul 24 17:12:26 1998
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Date: Thu, 23 Jul 1998 22:35:16 -0400
From: "Prof. Sue WHITESIDES" <sue@CS.McGill.CA>
Message-Id: <199807240235.WAA05633@tango.CS.McGill.CA>
To: compgeom-announce@research.bell-labs.com
Subject: Graph Drawing '98 program and late registration 
Precedence: bulk
Status: RO



              Graph Drawing '98 (GD '98) 
                  August 13-15, 1998

Registration for Graph Drawing '98 (GD '98) increases 
to CD$300 (regular) and CD$175 (student) on 1 August. 
The registration forms are available at the web site, 
http://gd98.cs.mcgill.ca. 

Here is the preliminary program. 

-------------------------------------------------------------

              Graph Drawing '98  (GD '98)
                 August 13-15, 1998   
           McGill University, Montreal, Canada
                 Preliminary Program  

  http://gd98.cs.mcgill.ca      info@gd98.cs.mcgill.ca 

All technical talks and demos are in the Redpath Museum
Lecture Hall, 859 Sherbrooke St. West, on the McGill campus.  
McGill is on Sherbrooke St. West between McTavish and 
University Streets in the heart of downtown Montreal.  

All papers and demos are of 20 minutes duration. 

Registration is at Thomson House, 3650 McTavish St. above  
Dr. Penfield Street, 7pm-10pm Wednesday, August 12. 
Registration is also available at the technical sessions. 
 
Lunch (included in registration fee) on Thursday and 
Friday is at Thomson House.  GD '98 closes at 12:30pm 
on Saturday, August 15.  Saturday lunch is not provided. 

The banquet takes place (to be confirmed) at Club St. Denis, 
257 Sherbrooke St. East on Friday, August 14, from 7pm. 
The results of the Graph Drawing Contest are to be announced 
at that time.  

Please examine the web site for updates close to conference
time. 


----------------------- Wednesday, August 12 ---------------------- 

Registration: Thomson House, 3650 McTavish St.  7pm-10pm 
party: GD '98 participants are invited to the farewell party 
for CCCG, upstairs in Thomson House, beginning at 8pm. 


----------------------- Thursday, August 13 -----------------------

Registration:  8-9am Redpath Museum 
               + during morning coffee break 10:30-11

 9:00-9:10   Welcome Words 

Session I: 9:10-10:30am (4 papers) 

 9:10-9:30  "Embedding Planar Graphs at Fixed Vertex Locations"
             Janos Pach and Rephael Wenger

 9:30-9:50  "Planar Polyline Drawings with Good Angular Resolution"
             Carsten Gutwenger and Petra Mutzel

 9:50-10:10 "A Framework for Drawing Planar Graphs with Curves 
             and Polylines"
             Michael T. Goodrich and Christopher G. Wagner

10:10-10:30 "Crossing Number of Abstract Topological Graphs"
             Jan Kratochvil

---------------------------------------------------------
10:30-11am break, registration desk open, poster gallery
---------------------------------------------------------

Session II: 11-noon  (3 papers)

11:00-11:20 "Balanced Aspect Ratio Trees and Their Use for Drawing 
             Very Large Graphs"
             Christian A. Duncan, Michael T. Goodrich and 
             Stephen G. Kobourov

11:20-11:40 "Geometric Thickness of Complete Graphs"
             Michael B. Dillencourt, David Eppstein and 
             Daniel S. Hirschberg

11:40-noon  "NP-Completeness of some Tree-Clustering Problems"
             F. Schreiber and K. Skodinis

--------------------------
12-2pm lunch Thomson House 
--------------------------

Session III: 2-3:30pm (3 demos) 

 2:00-2:20 "Edge Labeling in the Graph Layout Toolkit"
            Ugur Dogrusoz, Konstantinos G. Kakoulis, Brendan Madden 
            and Ioannis G. Tollis

~2:30-2:50 "Graph Multidrawing: Finding Nice Drawings Without
            Defining Nice"
            Therese Biedl, Joe Marks, Kathy Ryall and Sue Whitesides

~3:00-3:20 "JIGGLE: Java Interactive General Graph Layout 
            Environment" 
            Daniel Tunkelang

-------------------------------
3:20-4pm break & poster gallery 
-------------------------------

Session IV: 4-5:20pm (4 papers) 

4:00-4:20 "Approximation Algorithms for Finding Best Viewpoints"
           Michael E. Houle and Richard Webber

4:20-4:40 "A Combinatorial Framework for Map Labeling"	
           Alexander Wolff and Frank Wagner

4:40-5:00 "Self-Organizing Graphs"
           Bernd Meyer

5:00-5:20 "Using Graph Layout to Visualize Train 
           Interconnection Data"
           Ulrik Brandes and Dorothea Wagner

---------------------------------------
5:20-6pm Book Launching  Redpath Museum 
---------------------------------------


----------------------- Friday, August 14 -------------------------

Registration: 8-9am Redpath Museum  
              + during morning break 10-10:30  

Session V: 9-10am (3 papers) 

 9:00-9:20  "An Algorithm for Three-Dimensional Orthogonal 
             Graph Drawing"
             David R. Wood

 9:20-9:40  "Three Approaches to 3D-Orthogonal Box-Drawings"
             Therese C. Biedl

 9:40-10:00 "A Split&Push Approach to 3D Orthogonal Drawing"
             Giuseppe Di Battista, Maurizio Patrignani and 
             Francesco Vargiu

------------------------------------------------------
10-10:30 break, registration desk open, poster gallery  
------------------------------------------------------

Session VI: 10:30-11:50am (4 papers) 

10:30-10:50 "On Improving Orthogonal Drawings: The 4M-Algorithm"
             Ulrich Foessmeier, Carsten Hess and Michael Kaufmann

10:50-11:10 "Refinement of Orthogonal Graph Drawings"
             Janet M. Six, Konstantinos G. Kakoulis and 
             Ionnis G. Tollis

11:10-11:30 "Difference Metrics for Interactive Orthogonal Graph 
             Drawing Algorithms"
             Stina Bridgeman and Roberto Tamassia

11:30-11:50 "A Layout Adjustment Problem for Disjoint Rectangles 
             Preserving Orthogonal Order"
             Kunihiko Hayashi, Michiko Inoue, Toshimitsu Masuzawa 
             and Hideo Fujiwara

----------------------------------------------------------------
11:50-noon group photo (to be confirmed) on the steps of Redpath 

noon-2pm lunch Thomson House 
----------------------------------------------------------------

Session VII:  2-3:20pm (3 demos) 

 2:00-2:20 "Cooperation between Interactive Actions and Automatic 
            Drawing in a Schematic Editor"
            Gilles Paris

~2:30-2:50 "Improved Force-directed Layouts"
            Emden R. Gansner and Stephen C. North

~3:00-3:20 "Large Graph Exploration with H3Viewer and Site Manager" 
            Tamara Munzner

---------------------------------
3:20-4pm break and poster gallery  
---------------------------------

Session VIII: 4-5pm (3 papers) 

 4:00-4:20 "Level Planarity Testing in Linear Time"
            Michael Juenger, Sebastian Leipert and Petra Mutzel

 4:20-4:40 "Upward Planarity Checking: Faces Are More 
            than Polygons"
            Giuseppe Di Battista and Giuseppe Liotta

 4:40-5:00 "Quasi-Upward Planarity"
            Paola Bertolazzi, Giuseppe Di Battista and Walter Didimo

-------------------------------------------------------------
7pm-11pm banquet Club St. Denis, 257 Sherbrooke East near  
                 St. Denis (dinner followed by award ceremony
                 for Graph Drawing Contest Winners) 
-------------------------------------------------------------


----------------------- Saturday, August 15 -----------------------

Session IX: 9-10:20am (4 papers) 
                 
 9:00-9:20  "Drawing Algorithms for Series-Parallel Digraphs in 
             Two and Three Dimensions"
             Seok-Hee Hong, Peter Eades, Aaron Quigley and 
             Sang-Ho Lee

 9:20-9:40  "Proximity Drawings: Three Dimensions are Better 
             than Two"
             Paolo Penna and Paola Vocca

 9:40-10:00 "Drawing of Two-dimensional Irregular Meshes"
             Alok Aggarwal, S. Rao Kosaraju and Mihai Pop

10:00-10:20 "Algorithmic Patterns for Graph Drawing"
             Natasha Gelfand and Roberto Tamassia

------------------------------------
10:20-10:50am break & poster gallery 
------------------------------------ 

Session X: 10:50am-12:20pm (3 demos)

 10:50-11:10 "Visualization of Parallel Execution Graphs"
              Bjoern Steckelbach, Till Bubeck, Ulrich Foessmeier, 
              Michael Kaufmann, Marcus Ritt and Wolfgang Rosestiel

~11:20-11:40 "A Fully Animated Interactive System for Clustering 
              and Navigating Huge Graphs"
              Mao Lin Huang and Peter Eades

~12:00-12:20 "HIGRES -- System Demonstration"   
              Ivan A. Lisitsyn

------------------------------------------------------------
Closing Remarks: 12:20-12:30pm  See you in Prague at GD '99.
------------------------------------------------------------
















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From compgeom-owner@research.bell-labs.com  Mon Aug  3 02:04:36 1998
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Date: Mon, 27 Jul 1998 22:06:12 -0400 (EDT)
Message-Id: <199807280206.WAA11706@euclid.cs.duke.edu>
To: compgeom-announce@research.bell-labs.com
Subject: SCG'98: Open problems
Precedence: bulk
Status: RO

	Problems presented at the open-problem session of SCG'98 are
finally available on web.

   URL: http://www.cs.duke.edu/~pankaj/scg98-openprobs/open-probs.html

The problems  will also appear in the CG column of the 
next issue of SIGACT news.
-Pankaj

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From compgeom-owner@research.bell-labs.com  Mon Aug  3 02:07:58 1998
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Date: Tue, 28 Jul 1998 21:17:49 +0200
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Subject: EUROGRAPHICS'98, LISBOA, PORTUGAL: Call for Participation
Reply-To: info@eg98.gpcg.pt
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Status: RO

       (please accept our apologies if you receive this more than once)

			    CALL FOR PARTICIPATION

				EUROGRAPHICS'98
	      19th Annual Meeting of the EUROGRAPHICS Association

		 August 31-September 4, 1998 Lisboa, Portugal
			Fundac,a~o Calouste Gulbenkian

			   http://www.eg98.gpcg.pt/

EUROGRAPHICS has become the leading international computer graphics conference
in Europe. Promoted by the EUROGRAPHICS Association, EUROGRAPHICS'98 its 19th
annual meeting, takes place in Lisboa, Portugal, from 31 August to September 4
1998, under the motto "Discovering New Realities".

EG98 main technical program comprises 35 top-quality research papers from
computer graphics researchers from all over the world, in twelve technical
sessions covering interesting topics such as Virtual and Augmented
Environments, Integrated Audiovisual and Haptic Virtual Worlds, Virtual
Reality, VRML and Graphics on the World-Wide Web, Computer Graphics and
Multimedia, Rendering and Realistic Image Synthesis and Human-Computer
Interaction.

As usual, EG98 also includes State-of-the-Art-Reports and Panels as well as
three distinguished invited speakers, Andries van Dam, James Foley and Jose'
Encarnac,a~o. Researchers from Silicon Graphics and Microsoft among others,
will present the latest developments on the industry front.

New this year are twenty Short Presentations and Interactive Demonstrations
featuring quality work in progress, well formulated ideas and application
results. In addition to the main conference, five pre-conference tutorials and
two pre-conference workshops offer in depth tuition and discussion of specific
hot topics in the field.

The conference takes place in Fundac,a~o Calouste Gulbenkian, an international
conference centre strategically located in Lisboa. If you are interested in
participating in EUROGRAPHICS'98, it is very important to register for the
event, book hotel accommodations and flights as soon as possible. Due to the
World Fair EXPO'98, plane seats and hotel rooms may be difficult to come by.

Full details of the main conference program, workshops, tutorials and other
events, plus registration and accommodation information, and a web-based
registration form are available on the website.  If you would like to receive
an email attachment with the final program and registration form please respond
to this email.

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From compgeom-owner@research.bell-labs.com  Mon Aug  3 02:09:55 1998
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Date: Wed, 29 Jul 1998 17:09:43 +0200 (MDT)
From: Remco Veltkamp <Remco.Veltkamp@cs.uu.nl>
To: compgeom-announce@research.bell-labs.com
Subject: CGAL release 1.1
Message-ID: <Pine.SGI.3.96.980729170844.578e-100000@xbach.cs.uu.nl>
X-Org: Department of Computer Science; Utrecht University
X-Org: P.O. Box 80.089; 3508 TB  Utrecht; The Netherlands.
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We are pleased to announce release 1.1 of CGAL, the Computational 
Geometry Algorithms Library. Additions to release 1.0 include
- 3D intersections 
- kD points 
- 3D convex hull 
- kD smallest enclosing sphere 


The CGAL project is a collaborative effort to develop a robust, easy to use, 
and efficient C++ software library of geometric data structures and 
algorithms. The CGAL library contains:
- Basic geometric primitives such as points, vectors, lines, 
  predicates such as for relative positions of points, and operations 
  such as intersections and distance calculation.
- A collection of standard data structures and geometric algorithms, 
  such as convex hull, (Delaunay) triangulation, planar map, polyhedron, 
  smallest enclosing sphere, and multidimensional query structures.
- Interfaces to other packages, e.g. for visualisation, and I/O, and 
  other support facilities. 

For further information and for downloading the library and documentation, 
please visit the CGAL web page:

    http://www.cs.uu.nl/CGAL/

Should you have any questions or comments, please send a message to 
cgal@cs.uu.nl



--------------------------------------------------------------------
Remco Veltkamp                  | email: Remco.Veltkamp@cs.uu.nl
                                | phone: +31-30-2534091
Dept. Computing Science         | fax:   +31-30-2513791
Utrecht University              | 
Padualaan 14                    | P.O. Box 80089
3584 CH Utrecht                 | 3508 TB Utrecht
The Netherlands                 | The Netherlands
--------------------------------------------------------------------


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From compgeom-owner@research.bell-labs.com  Mon Aug  3 02:11:52 1998
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Date: Thu, 30 Jul 1998 10:19:37 -0400 (EDT)
Message-Id: <199807301419.KAA14133@snow.cs.dartmouth.edu>
From: Bruce Randall Donald <brd@snow.cs.dartmouth.edu>
To: compgeom-announce@research.bell-labs.com
Subject: Research Associate Job at Dartmouth
X-aleph-stage:  Copernican Haifa tarpon.
Reply-To: brd@CS.Dartmouth.EDU (Bruce Randall Donald)
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Status: RO


Dartmouth
Department of Computer Science

Postdoctoral Research Associate in Computer Science: We are looking
for someone with a doctorate in computer science to conduct focused
research on computational (structural) biology and computer-aided drug
design. The position involves a two-year appointment which may be
extended depending on funding.  The research is concerned with
geometric algorithms and systems for drug design and for the automated
interpretation of protein NMR data.

For more information on this position see
http://www.cs.dartmouth.edu/~brd/job.html#CompBio. Applicants should
send a resume and have at three referees send letters of
recommendation to Prof. Bruce Randall Donald, Dept. of Computer
Science, Dartmouth, 6211 Sudikoff Laboratory, Hanover, NH
03755-3510, brd@cs.dartmouth.edu, http://www.cs.dartmouth.edu/~brd/.
Electronic submissions (ascii text only, no enclosures please) are
encouraged.

Review of applications will begin immediately, and continue until this
position is filled.  Dartmouth is an Equal Opportunity Affirmative
Action employer.

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From compgeom-owner@research.bell-labs.com  Tue Aug 11 00:34:02 1998
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Message-ID: <19980804135506.A15012@jupiter.kaist.ac.kr>
Date: Tue, 4 Aug 1998 13:55:06 +0900
From: "ISAAC '98" <isaac98@jupiter.kaist.ac.kr>
To: compgeom-announce@research.bell-labs.com
Subject: [ISAAC'98] Accepted Papers
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Below is a list of paper accepted to ISAAC'98 to be held in Taejon, Korea
on December 14-16, 1998. More information can be obtained from
the conference web site: http://tclab.kaist.ac.kr/~isaac98/

***************************************************************************

On-Line Scheduling of Parallel Jobs with Runtime Restrictions
--- Stefan Bischof and Ernst W. Mayr

Approximation algorithms for some optimum communication spanning tree problems
--- Bang Ye Wu, Kun-Mao Chao, and Chuan Yi Tang

Approximation and Exact Algorithms for {RNA} Secondary Structure Prediction and Recognition of Stochastic Context-free Languages
--- Tatsuya Akutsu

An optimal algorithm for on-line palletizing at delivery industry
--- J. Rethmann and E. Wanke

Generalized Self-Approaching Curves
--- Oswin Aichholzer, Franz Aurenhammer, Christian Icking, Rolf Klein, Elmar Langetepe, and Guenter Rote

A New Approach for Speeding Up Enumeration Algorithms
--- Takeaki Uno

Two New Families of List Update Algorithms
--- Frank Schulz

Two-Layer Planarization in Graph Drawing
--- Petra Mutzel and Ren'e Weiskircher

Randomized $O( log log n)$-Round Leader Election Protocols in Packet Radio Networks
--- Koji Nakano and Stephan Olariu

Repairing Flaws in a Picture Based on a Geometric Representation of a Digital Image
--- Tetsuo Asano, Hiro Ito, Souichi Kimura, and Nariaki Shimazu

Convertibility among Grid Filling Curves
--- Tetsuo Asano, Naoki Katoh, Hisao Tamaki, and Takeshi Tokuyama

Selecting the k Largest Elements with Parity Tests
--- T.W. Lam and H.F. Ting

Disjunctions of Horn Theories and their Cores
--- Thomas Eiter, Toshihide Ibaraki, and Kazuhisa Makino

Optimality and Integer Programming Formulations of Triangulations in General Dimension
--- Akira Tajima

Computing Orthogonal Drawings in a Variable Embedding Setting
--- W. Didimo and G. Liotta

Inapproximability results for guarding polygons without holes
--- Stephan Eidenbenz

Polyhedral Structure in Submodular and Posi-modular Systems
--- Hiroshi Nagamochi and Toshihide Ibaraki

The Edge-Disjoint Paths Problem is NP-Complete for Partial $k$-Trees
--- Xiao Zhou and Takao Nishizeki

Checking Programs Discretely: Demonstrating Result-Correctness Efficiently While Concealing It
--- G.D. Crescenzo, K. Sakurai, , and M. Yung

Dynamic Grid Embedding with Few Bends and Changes
--- Ulrik Brandes and Dorothea Wagner

Maximizing the Number of Connections in Optical Tree Networks
--- Thomas Erlebach and Klaus Jansen

A parallel algorithm for sampling matchings from an almost uniform distribution
--- J. Diaz, J. Petit, P. Psycharis, and M. Serna

Randomized $k$-Dimensional Binary Search Trees
--- Amalia Duch, Vladimir Estivill-Castro, and Conrado Martinez

On the inapproximability of non NP-hard optimization problems
--- Liming Cai, David Juedes, , and Iyad Kanj

Quadtree Decomposition, Steiner Triangulation, and Ray shooting
--- Siu-Wing Cheng and Kam-Hing Lee

Casting with Skewed Ejection Direction
--- Hee kap Ahn, Siu-Wing Cheng, and Otfried Cheong

An Efficient NC Algorithm for a Sparse $k$-Edge-Connectivity Certificate
--- Hiroshi Nagamochi and Toru Hasunuma

Fast Algorithms for Independent Domination and Efficient Domination in Trapezoid Graphs
--- Yaw-Ling Lin

Space-efficient Approximation Algorithms for MAXCUT and COLORING Semidefinite Programs
--- Philip N. Klein and Hsueh-I Lu

On the Multiple Gene Duplication Problem
--- Michael Fellows, Michael Hallett, and Ulrike Stege

$L_\infty$ Voronoi Diagrams and Applications to VLSI Layout and Manufacturing
--- Evanthia Papadopoulou

Characterization of Efficiently Computable Problems on Distance-Hereditary Graphs
--- Sun yuan Hsieh, Chin wen Ho, Tsan sheng Hsu, Ming tat Ko, and Gen-Huey Chen

An Algorithm for Finding Geometric Automorphisms in Planar Graphs
--- Seok-Hee Hong, Peter Eades, and Sang-Ho Lee

Facility Location on Terrains
--- Boris Aronov, Marc van Kreveld, Ren'e van Oostrum, and Kasturirangan Varadarajan

A Quantum Polynomial Time Algorithm in Worst Case for Simon's Problem
--- Takashi Mihara and Shao-Chin Sung

Optimal Approximate Agreement with Omission Faults
--- Richard Plunkett and Alan Fekete

$k$-Edge and 3-Vertex Connectivity Augmentation in an Arbitrary Multigraph
--- Toshimasa Ishii, Hiroshi Nagamochi, and Toshihide Ibaraki

The Steiner tree problem in $\lambda_4$-geometry plane
--- Guo-Hui Lin and Guoliang Xue

Generalized Graph Colorability and Compressibility of Boolean Formulae
--- Richard Nock, Pascal Jappy, and Jean Sallantin

A Capacitated Vehicle Routing Problem on a Tree
--- Shin ya Hamaguchi and Naoki Katoh

Visibility Queries in Simple Polygons and Applications
--- Boris Aronov, Leonidas J. Guibas, Marek Teichmann, and Li Zhang

Hamiltonian decomposition of recursive circulants
--- Jung-Heum Park

On the Complexity of Free Monoid Morphisms
--- Klaus-Joern Lange and Pierre McKenzie

Testing the quality of manufactured disks and cylinders
--- Prosenjit Bose and Pat Morin

Random Regular Graphs with Edge Faults Expansion through Cores
--- Andreas Goerdt

Computing Weighted Rectilinear Median and Center Set in the Presence of Obstacles
--- Joonsoo Choi, Chan-Su Shin, and Sung Kwon Kim

Maximizing Agreement with a Classification by Bounded or Unbounded Number of Words
--- Hiroki Arimura and Shinichi Shimozono


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From compgeom-owner@research.bell-labs.com  Tue Aug 11 00:40:26 1998
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Subject: SCG '98: Pictures etc.
To: compgeom-announce@research.bell-labs.com
Date: Wed, 5 Aug 1998 15:32:08 -0500 (CDT)
Cc: clarkson@research.bell-labs.com (Ken Clarkson),
        janardan@mail.cs.umn.edu (Ravi Janardan)
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A set of pictures taken at the 1998 ACM Symp. on
Computational Geometry, in Minneapolis, can now be 
accessed by following links from the Symposium web 
page (http://www.cs.umn.edu/scg98).

Also available there are previously-distributed items such
as minutes of the Business meeting and problems presented in 
the Open Problems session.

Ravi Janardan

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From compgeom-owner@research.bell-labs.com  Tue Aug 11 00:44:07 1998
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Date: Thu, 06 Aug 1998 16:31:51 -0400
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Organization: Brown University
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Subject: Call for Papers: 3rd CGC Workshop on Computational Geometry
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--------------0BCBA57B28722BFDABDFE9FC
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                         3rd CGC Workshop on 
                        Computational Geometry

                         October 11-12, 1998 
                  Brown University, Providence, RI

                            Sponsored by 
                 The Center for Geometric Computing 
                                and 
        The Department of Computer Science,  Brown University

We are pleased to announce the third annual fall Workshop on
Computational Geometry, sponsored by the Center for Geometric
Computing, continuing a tradition established by the Mathematical
Sciences Institute at SUNY-Stony Brook. The Center for Geometric
Computing is a collaborative center of Brown, Duke, and Johns Hopkins
Universities, and is funded by the U.S. Army Research Office.


Scope and Format
----------------

The aim of this workshop is to bring together researchers from
academia, industry, and the Army to stimulate collaboration on
problems of common interest arising in geometric computations. Topics
to be covered include, but are not limited to
  
 * Algorithmic methods in geometry      * Experimental studies
 * I/O-scalable geometric algorithms    * Geometric data structures 
 * Animation of geometric algorithms    * Implementation issues
 * Computer graphics                    * Robustness
 * Solid modeling                       * Computer vision
 * Geographic information systems       * Robotics 
 * Computational metrology              * Computer-aided design
 * Graph drawing                        * Mesh generation

Following the tradition of the previous MSI and CGC Workshops on
Computational Geometry, the format of the workshop will be informal,
extending over 2 days, with several breaks scheduled for discussions.

Registration will be on-site, and will include the abstract booklet,
coffee breaks, lunches, and a reception. There will be a nominal
registration fee of $35.


Invited speakers
----------------

* Jadgish Chandra (U.S. Army Research Laboratory) 
* John Hughes (Brown University) 
* Joe Marks (Mitsubishi Electrical Research Laboratories) 
* Chee Yap (New York University) 


Submissions
-----------

Authors are invited to submit abstracts for talks to be given at the
workshop. Please send an abstract (up to 2 pages) and a draft of a
paper (if you have one). E-mail submissions are encouraged; send to
cgc@cs.brown.edu. Ideally, the abstract should be a PDF, PostScript,
or LaTeX, file, for ease in assembling the abstract booklet. Abstracts
can also be sent by regular mail to

    Roberto Tamassia 
    Department of Computer Science 
    Brown University 
    115 Waterman Street 
    Providence, RI 02912-1910

Submissions should arrive by September 10, 1998. Authors will be
notified of acceptance by September 18, 1997.

A booklet of abstracts will be distributed at the workshop and made
available electronically on the Web. There will be no formal
proceedings for this workshop, but selected papers will be invited to
a special issue of the journal "Computational Geometry: Theory and
Applications" (edited by Michael T. Goodrich).



Program Committee
-----------------

  * Pankaj K. Agarwal       * Joseph S. B. Mitchell  
  * Lars Arge               * Franco P. Preparata
  * Michael T. Goodrich     * Roberto Tamassia
  * S. Rao Kosaraju         * Jeffrey S. Vitter 





Local Arrangements
------------------
  * Mary Andrade    (maa@cs.brown.edu)
  * Stina Bridgeman (ssb@cs.brown.edu)
  * Vasiliki Chatzi (vc@cs.brown.edu)



For more information about the workshop, send mail to
cgc@cs.brown.edu. Further information will be posted to our web site 
(http://www.cs.brown.edu/cgc/cgc98/) as soon as it is available.


--------------0BCBA57B28722BFDABDFE9FC--


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From compgeom-owner@research.bell-labs.com  Tue Aug 11 00:44:34 1998
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Date: Thu, 6 Aug 1998 11:50:14 -0400
From: Robin Flatland <flatland@ares.cs.siena.edu>
Message-Id: <9808061550.AA23516@ares.cs.siena.edu>
To: compgeom-discuss@research.bell-labs.com
Subject: reconstructing closed curves from curve fragments
Precedence: bulk
Status: RO


Hi all,

I was wondering if anyone knew of work related to the following
problem:

The input is a set of piece-wise linear curves in the plane.  These
curves are fragments from the boundaries of some unknown regions.  The
output needed is a collection of closed, piece-wise linear curves of
which the input curves are a subset.  These closed curves should
somehow capture the shape of the region boundaries.

I'm aware of work on reconstructing curves from point data (such as
the crust), but hadn't seen anything that considered starting from
curve fragments.

Thanks,

Robin Flatland

*********************************************************
Dr. Robin Flatland
Computer Science Dept        Consultant to GE-CR&D
Siena College                Image Understanding Group
515 Loudon Road              1400 Balltown Road
Loudonville, NY 12211        Schenectady, NY 12301
(518) 782-6541               (518) 393-7379
********************************************************


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From compgeom-owner@research.bell-labs.com  Tue Aug 11 00:45:04 1998
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From: "Martin Will" <will@inf.ethz.ch>
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Date: Fri, 7 Aug 1998 22:43:54 -0700
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Dear all,

I am currently preparing a comparison of algorithms for computing 3-D
additively weighted Voronoi (aka Johnson-Mehl) diagrams. However, I could not
find an actual implementation of F. Aurenhammer's reduction to 4-D power
diagrams, as described e.g. in the textbook by Boissonnat & Yvinec.

On request, F. Aurenhammer told me that he could remind some Japanese group
working on an implementation. Unfortunately, he wasn't able to recall any more
details.

I would be very grateful to any hint or reference to either this group or any
other person who has worked on this subject.

Thank you very much.

Hans-Martin Will

---------------------------------------------------------------------------

Hans-Martin Will			email: will@inf.ethz.ch
ETH Zuerich				phone: +41-1-632 7335
Institut fuer Theoretische Informatik	fax:   +41-1-632 1172

CH-8092 Zuerich
Switzerland

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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is a reminder that the deadline for submissions to Solid Modeling '99
is approaching. Abstracts are due September 30, and full papers October 30.
An updated version of the Call for Papers is appended.

Wim Bronsvoort
David Anderson
Program Co-Chairs

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

                        *********************
                        *  CALL FOR PAPERS  *
                        *********************

              *****************************************
              *                                       *
              *          SOLID MODELING '99           *
              *                                       *
              *         FIFTH ACM SYMPOSIUM ON        *
              *    SOLID MODELING AND APPLICATIONS    *
              *                                       *
              *****************************************


           Sheraton Inn, Ann Arbor, Michigan, June 9-11, 1999

                     Sponsored by ACM SIGGRAPH

This symposium provides an international forum for the exchange of recent
research and practical results in all areas and applications of solid
modeling. Emphasis is on solid modeling in design, analysis and
manufacturing. Previous symposia in this series (Austin, Texas, 1991,
Montreal, Canada, 1993, Salt Lake City, Utah, 1995, and Atlanta, Georgia,
1997) brought together the most prominent researchers, key practitioners,
and numerous students in the field.

In 1999, the symposium will have several new features, including:
  * tutorials on June 8
  * panel sessions
  * ACIS Best Paper Award, sponsored by Spatial Technology Inc.
  * sponsorship by ONR of undergraduate students to attend the symposium.

More information on the symposium, as it becomes available, can be found on
the Solid Modeling '99 WWW page at:

  http://www.engin.umich.edu/dept/meam/deslab/cadcam/ACMSM/

If you do not have access to the WWW, you can request a copy of this page
by sending an email to dutta@engin.umich.edu.

The schedule for submission of papers is as follows:

September 30, 1998:   Abstracts due
October   30, 1998:   Full papers due
January   31, 1999:   Notice of acceptance and reviewers' comments
February  28, 1999:   Final camera-ready papers and extended abstracts due

For details on how to submit abstracts and papers, please consult the WWW 
page.

Abstracts are used to facilitate the review process, and should be 150-300
words long.

Papers should be at most 12 normally typeset pages, including figures and
references, and should present previously unpublished original results.

Papers will be peer-reviewed and can be selected for presentation at a
plenary session with publication in the conference proceedings published by
ACM Press, or presentation at a poster session with publication of an
extended two-page abstract in the conference proceedings.

A revised version of a number of selected papers will also be published in
a special issue of the journal Computer-Aided Design.

The ACIS Best Paper Award of $1500, sponsored by Spatial Technology Inc.,
will be awarded by a jury.

Video and other special equipment will be available for presentations when
requested.

Topics for papers include, but are not limited to:

 1) Geometric and topological representations
 2) Multiresolution models
 3) Heterogeneous models
 4) Geometric interrogations and reasoning
 5) Computational geometry relevant to modeling
 6) Robustness of geometric computations
 7) Blends, sweeps, offsets, deformations and other constructional methods
 8) Procedural, constraint-based and parametric modeling
 9) Modeling families of geometric objects
10) Feature-based modeling
11) Conceptual design techniques
12) Product modeling
13) Assembly modeling
14) Representation conversion
15) Product data exchange
16) User interaction techniques
17) Collaborative/distributed design
18) Virtual environments and prototypes
19) Reverse engineering
20) Engineering analysis, including FE mesh generation
21) Engineering tolerances
22) Manufacturing and assembly planning
23) Computational support for new manufacturing technologies

General Chair
-------------
  Deba Dutta, University of Michigan

Financial Chair
---------------
  Ming Lin, University of North Carolina

Tutorials Chair
---------------
  Jan Vandenbrande, Boeing

Program Co-Chairs
-----------------
  Wim Bronsvoort, Delft University of Technology
  David Anderson, Purdue University

Program Committee
-----------------
  Adrian Bowyer, University of Bath
  Beat Bruderlin, Technical University of Ilmenau
  Pere Brunet, Polytechnic University of Catalonia
  Richard Crawford, University of Texas
  Gershon Elber, Technion
  Bianca Falcidieno, CNR Italy
  Mark Henderson, Arizona State University
  Chris Hoffmann, Purdue University
  Fumihiko Kimura, University of Tokyo
  R\"udiger Klein, Daimler Benz
  Kunwoo Lee, Seoul National University
  Remi Lequette, ILOG
  Dinesh Manocha, University of North Carolina
  Martti M\"antyl\"a, Helsinki University of Technology
  Jai Menon, IBM Research
  Jim Miller, University of Kansas
  Joseph Mitchell, SUNY Stony Brook
  Nick Patrikalakis, MIT
  Mike Pratt, Rensselaer/NIST
  Ari Rappoport, Hebrew University
  Jarek Rossignac, Georgia Institute of Technology
  Vadim Shapiro, University of Wisconsin-Madison
  George Turkiyyah, University of Washington
  Tamas Varady, Hungarian Academy of Sciences
  Kevin Weiler, Silicon Graphics
  John Woodwark, Information Geometers


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From compgeom-owner@research.bell-labs.com  Thu Sep  3 04:07:31 1998
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Date: Tue, 01 Sep 1998  9:18 -0500
From: cmonteir@bug.com
To: compgeom-discuss@research.bell-labs.com, will@inf.ethz.ch
Subject: Convex hulls
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     I'm relatively new to the field and therefore have a simple question 
     which I would very much appreciate some assistance with.
     
     I'm trying to locate pseudo-code for an algorithm that would determine 
     the convex hull of a set of points. 
     
     Thanks in advance.
     
     Charles

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From compgeom-owner@research.bell-labs.com  Fri Sep  4 03:38:40 1998
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Date: Thu, 03 Sep 1998 09:25:04 +0200
From: Marc van Kreveld <marc@cs.uu.nl>
Organization: Universiteit Utrecht, Dept. of Computer Science
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Call for Papers
             Special Issue of Algorithmica:

     -- Algorithms for Geographical Information --


Submission deadline: December 21, 1998
Expected publication: Early 2000
Guest editor: Marc van Kreveld

Algorithmica is planning a special issue on algorithms for
geographical information. Papers describing original research are
solicited that deal with algorithmic issues for handling geographic
information.  Survey and state-of-the-art papers will also be
considered; in that case, please contact the guest editor as soon as
possible with the intended contents to avoid conflicts.

Topics of interest include, but are not limited to, algorithmic issues
in:

* map overlay
* map generalization
* label placement
* terrain models
* spatial interpolation
* geostatistics
* spatio-temporal data
* error handling and uncertainty
* feature extraction
* visualization, animation, and simulation
* network analysis
* mathematical modeling of geographic problems
* optimization, parallel, distributed, geometric, graph, and
  evolutionary algorithms applied to geographical data

Papers that extend well-known algorithms in nontrivial ways in order to
be relevant to geographic data handling are also solicited. Every paper
should explicitly address its relevance to geographical data handling.
Theoretical and/or experimental analysis is encouraged.

Manuscripts should be prepared according to the standard submission
guidelines of Algorithmica. All submissions will be subject to the
regular refereeing process of the journal. Submit five copies of a
full paper to the guest editor (address below) by December 21, 1998.

Marc van Kreveld
Dept. of Computer Science
Utrecht University
P.O.Box 80.089
3508 TB Utrecht
The Netherlands

E-mail: marc@cs.uu.nl

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From compgeom-owner@research.bell-labs.com  Fri Sep  4 03:41:20 1998
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Date: Thu, 3 Sep 1998 08:38:21 -0400
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---------------------------------------------------------------------------
-----
Workshop on Multi-Resolution Representation of
3D Geometry for Progressive Transmission
---------------------------------------------------------------------------
-----

To be held prior to IEEE Visualization'98,
on Saturday, October 17th, 1998 1-5 pm.

Workshop Organizers:

Andre Gueziec
IBM T.J. Watson Research Center
gueziec@watson.ibm.com

Gabriel Taubin
IBM T.J. Watson Research Center
taubin@watson.ibm.com

---------------------------------------------------------------------------
-----
Workshop description:
---------------------------------------------------------------------------
-----

There has been recently considerable interest in methods for
progressively delivering 3D surface geometry across a network or to a
display terminal. A few techniques have been proposed in the past few
years, which can be broadly classified as methods based on polygonal
surfaces or wavelets. It is a particularly good time to discuss these
issues now, because of the current interest in visualization of large
surface datasets, e.g.  geographic data sets.  Also, there is
considerable activity in the standardization of such techniques, for
instance in VRML and MPEG.

The purpose of this workshop is to bring together experts involved in
approaches using polygonal surfaces as well as approaches using
wavelets for visualization problems involving geometric data where the
issue of progressive transmission or display is important.  We will
attempt to answer the questions listed below, as well as other
questions that the participants feel important to address:

 - What is the relation between wavelet-based approaches and
   polygonal surface based approaches for progressive transmission of 3D
   geometry? Are they fundamentally the same? Is one approach superior
   to the other?

 - How can progressive transmission and view-dependent refinement of 3D
   geometry work together best?

 - How do current methods handle singular (non-manifold) input geometry?

 - Is it important to change the topology during progressive transmission?

 - How to cope with lost packets during transmission (assuming a
   protocol allowing that is used)? How to adapt the resolution/bitrate
   to the transmission bandwidth.

We are planning to write a report on this workshop and publish it
in a prominent journal or magazine. We may also decide to publish the
proceedings.

---------------------------------------------------------------------------
-----
If you wish to participate
---------------------------------------------------------------------------
-----

"Viz" requires that we limit participation to 20 people.  As the
workshop is scheduled to last 4 hours, we will do half talks and half
discussion.  We would like interested people to submit a 2 page
abstract if they want to give a talk, or 2 page statement if they want
to participate to the discussions without giving a talk.

If you wish to participate, please send your submission to
gueziec@watson.ibm.com, either in postscript or pdf form. Feel free to
send us e-mail for any further inquiry.

---------------------------------------------------------------------------
-----



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From compgeom-owner@research.bell-labs.com  Tue Sep  8 20:36:44 1998
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Date: Mon, 07 Sep 1998 16:35:42 -0400
From: Maurizio Pizzonia <map@cs.brown.edu>
Organization: Brown University
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We are very happy to announce release 2.0 of GDToolkit, an
object-oriented 
library for handling and drawing graphs. Main improvements to release
1.0 are: 

       Dual-graph generation 
       Planarizer supporting constraints 
       Extension of min-cost flow with lower bounds 
       Batch layout generator (BLAG) 
       Refinement of the end-user graph-editing tool (GRID)
       Constraints management 
              No crosses on the specified edge 
              No bends / any number of bends on the
              specified edge 
              Only right / only left bends along the specified
              edge 
              Specified set of nodes on the same face 
              Specified ordered set of nodes on the same
              face 
       Quasi-upward drawings 
              Slow upward layout generator (minimum number
              of bends over all the planar embeddings) 
              Slow compactor (based on a min-cost-flow
              technique) 
       Orthogonal drawings 
              Slow compactor (based on a min-cost-flow
              technique) 
              Compaction-refinement heuristic 
              Extension of orthogonal algorithms for nodes
              with arbitrary degree 

For further information and for downloading the library and
documentation, 
please visit the GDToolkit web page:

       http://www.dia.uniroma3.it/~gdt/


Maurizio Pizzonia

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From compgeom-owner@research.bell-labs.com  Tue Sep  8 20:38:09 1998
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Date: Tue, 08 Sep 1998 19:36:42 +0200
From: Igor Dozorets <digor@cs.Technion.AC.IL>
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            Hi everybody !

  My name is Igor, I make a M.Sc. in the Israel Institute of Technology.

I need to study the basics (as well as the recent achievements) in the
field of the Nearest Neighbor problem for my current research
(Speaker recognition). The problem is that I'm a newcomer in
Computational
Geometry.

  Can anybody suggest something to read to get familiar (quickly) with
the
basics of Computational Geometry in order to be able to surf the NN
topic
later ?


Thank you.




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                         3rd CGC Workshop on 
                        Computational Geometry

                         October 11-12, 1998 
                  Brown University, Providence, RI

                            Sponsored by 
                 The Center for Geometric Computing 
                                and 
        The Department of Computer Science,  Brown University

We are pleased to announce the third annual fall Workshop on
Computational Geometry, sponsored by the Center for Geometric
Computing, continuing a tradition established by the Mathematical
Sciences Institute at SUNY-Stony Brook. The Center for Geometric
Computing is a collaborative center of Brown, Duke, and Johns Hopkins
Universities, and is funded by the U.S. Army Research Office.

NEW!

  * registration information
  * hotel information
  * local information available at the web site
      (http://www.cs.brown.edu/cgc/cgc98/) 


Scope and Format
----------------

The aim of this workshop is to bring together researchers from
academia, industry, and the Army to stimulate collaboration on
problems of common interest arising in geometric computations. Topics
to be covered include, but are not limited to
  
 * Algorithmic methods in geometry      * Experimental studies
 * I/O-scalable geometric algorithms    * Geometric data structures 
 * Animation of geometric algorithms    * Implementation issues
 * Computer graphics                    * Robustness
 * Solid modeling                       * Computer vision
 * Geographic information systems       * Robotics 
 * Computational metrology              * Computer-aided design
 * Graph drawing                        * Mesh generation

Following the tradition of the previous MSI and CGC Workshops on
Computational Geometry, the format of the workshop will be informal,
extending over 2 days, with several breaks scheduled for discussions.


Registration
------------

Registration will be on-site, but please send mail to cgc@cs.brown.edu
by September 18 to indicate if you are coming. There will be a nominal
registration fee of $35, which includes the abstract booklet, coffee
breaks, lunches, and a reception. Credit cards cannot be accepted.


Invited speakers
----------------

* Jadgish Chandra (U.S. Army Research Laboratory) 
* John Hughes (Brown University) 
* Joe Marks (Mitsubishi Electrical Research Laboratories) 
* Chee Yap (New York University) 


Submissions
-----------

Authors are invited to submit abstracts for talks to be given at the
workshop. Please send an abstract (up to 2 pages) and a draft of a
paper (if you have one). E-mail submissions are encouraged; send to
cgc@cs.brown.edu. Ideally, the abstract should be a PDF, PostScript,
or LaTeX, file, for ease in assembling the abstract booklet. Abstracts
can also be sent by regular mail to

    Roberto Tamassia 
    Department of Computer Science 
    Brown University 
    115 Waterman Street 
    Providence, RI 02912-1910

Submissions should arrive by September 10, 1998. Authors will be
notified of acceptance by September 18, 1997.

A booklet of abstracts will be distributed at the workshop and made
available electronically on the Web. There will be no formal
proceedings for this workshop, but selected papers will be invited to
a special issue of the journal "Computational Geometry: Theory and
Applications" (edited by Michael T. Goodrich).



Program Committee
-----------------

  * Pankaj K. Agarwal       * Joseph S. B. Mitchell  
  * Lars Arge               * Franco P. Preparata
  * Michael T. Goodrich     * Roberto Tamassia
  * S. Rao Kosaraju         * Jeffrey S. Vitter 



Accommodations
-------------

Hotel space is very tight in Providence, so make your reservations as
soon as possible. Rooms have been reserved at the following places
until September 18:

  Brown Guest Rooms. 401-863-7500. Hotel-style rooms conveniently
    located on the Brown campus, within walking distance from the
    conference site. One or two people: $85 (few rooms available) Mention
    the "CGC Workshop" when making reservations.

  Providence Biltmore. Kennedy Plaza, Providence, RI 02903;
    401-421-0700 or 1-800-294-7709 (phone), 401-455-3050 (fax). One
    person, one double bed: $120, $20 additional for second person (20
    rooms) Mention the "CGC Workshop" and ask for the Brown University
    rate when making reservations.

  Additional local hotels may have discounted rates: 
         Marriott. Charles & Orms, Providence, RI; 401-272-2400
           or 1-800-228-9290. 
         Holiday Inn. 21 Atwells Ave. (exit 21 off I-95),
           Providence, RI; 401-831-3900. 
         Days Inn. 200 India St. (exit 3 off I-195), 401-272-5577.
  The rate for Saturday night should be lower than that for Sunday night. 

Additional local information (transportation, weather, restaurants,
etc) can be found at our web site (http://www.cs.brown.edu/cgc/cgc98/).

Further questions can be directed to cgc@cs.brown.edu. 


Local Arrangements
------------------
  * Mary Andrade    (maa@cs.brown.edu)
  * Stina Bridgeman (ssb@cs.brown.edu)
  * Vasiliki Chatzi (vc@cs.brown.edu)



For more information about the workshop, send mail to
cgc@cs.brown.edu. Further information will be posted to our web site 
(http://www.cs.brown.edu/cgc/cgc98/) as soon as it is available.


--------------B8810776CF4FCAA3FBDFAC24--


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From compgeom-owner@research.bell-labs.com  Wed Sep  9 00:22:20 1998
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From: Veronique Lang <veronique@rainbo.com>
To: "'compgeom-discuss@research.bell-labs.com'"
	 <compgeom-discuss@research.bell-labs.com>
Cc: Veronique Lang <veronique@rainbo.com>
Subject: help with collision detection
Date: Tue, 8 Sep 1998 12:15:25 -0700 
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I am trying to use the collision detection code described in the Graphics
Gems IV (Fast Collision detection of Moving Convex Polyhedra, R.Rabbitz, p
83-109). Unfortunately the algorithm sometimes does not stop. 
Does anybody have some experience with that code ? Any hint on how to solve
that problem ? (the algorithm is supposed to stop in any case, according to
the paper ).

Thanks in advance,

Veronique Martin-Lang
Rainbow Studios
veronique@rainbo.com
http://www.rainbo.com


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From compgeom-owner@research.bell-labs.com  Wed Sep  9 14:47:24 1998
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Date: Wed, 9 Sep 1998 10:58:21 +0200
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I'm happy to announce the release of SOLID version 2.0.

The new SOLID is a library for collision detection of three-dimensional
objects undergoing rigid motion and deformation. SOLID is designed to be
used in interactive 3D graphics applications, and is especially suited for
collision detection of objects and worlds described in VRML. 

The objects can be modeled as primitives, such as boxes, cones, cylinders,
and spheres, or as complex shapes composed of polytopes (line segments,
convex polygons, convex polyhedra). The placement of an object is given
either as a sequence of translations, rotations, and nonuniform scalings,
or as a 4x4 column-major matrix, that represents an affine transformation,
as used in OpenGL.    

The library is written in standard C++ and relies heavily on STL. Currently
it compiles under GNU g++ version 2.8.1 and Visual C++ 5.0. The library has
a standard C API and can be linked to both C and C++ applications.

The source code and documentation is released under the terms of the GNU
Library General Public License. It can be downloaded from URL:

http://www.win.tue.nl/cs/tt/gino/solid/

Gino


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From compgeom-owner@research.bell-labs.com  Wed Sep  9 14:56:08 1998
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Date: Wed, 09 Sep 1998 10:35:37 +0200
From: Petr Felkel <felkel@sgi.felk.cvut.cz>
Organization: CVUT FEL, Dept. of Comp. Science & Eng.
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I need to construct the contours in cross-sections from the input
triangular surface mesh (to slice the surface). It looks like a typical
CAD problem, byt I can't find either literature about this topic either
any publicly available source code.

The mesh is given as an indexFaceSet (in VRML), that means by the list
of points and by the list of tripples of indices, one tripple for one
triangle. The triangles are counter-clockwise oriented (their normal is
directed out from the surface). 

The created contours have to be also oriented - counter-clockwise for
the surface and clockwise for the holes (the inner part of object is on
the left-hand side of the contour.

The original mesh has been created by contour tiling - i.e. the major
number of triangles have one edge parallel to the cutting plane. But
there are mesh nodes (X) between the original cross-sections also, and
they complicate the slicing. 

Simple slicing  between planes which doesn't go through the (X) points
looks simple - I need to compute two intersections of two triangle edges
and then connect the segments into contours. The edge is shared by
exactly two triangles and the segment connectivity computation is
simple. But the singular cases exist, when the cross-section goes
through the (X) mesh node. More triangles complicates the intersection
computations and the problem of detection of the segment connectivity.

I will be grateful for any help

Thank you in advance 

	Petr Felkel
        felkel@sgi.felk.cvut.cz


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From compgeom-owner@research.bell-labs.com  Wed Sep  9 19:01:46 1998
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Is there any open literature about the following
basic problem?  Given a raster image I, and a 
linear transformation T, to compute the new image T(I).  

Usually T is a rigid transformation, perhaps
combined with a dilation.

Of course, such an algorithm must be implemented in
any of the software that manipulates images,
but I want to know if there are non-trivial
things to be said for this problem.

Thanks, Chee

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From compgeom-owner@research.bell-labs.com  Thu Sep 10 14:48:02 1998
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Subject: transforms
From: al001@rs1.rrz.Uni-Koeln.DE (Irwin Scollar)
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Concerning raster transforms, there is a working Windows 95/98/NT 
program called AirPhoto with full documentation and references for the 
algorithms used in Windows Help format for transforming scanned color 
or black and white images to scanned maps with various transformations 
(projective, second order polynomial and projective with polynomial 
correction) and either nearest neighbor, binlinear or bicubic spline 
interpoloation  available for downloading and test from the following web 
sites: 


http://www.uni-koeln.de/~al001/basp.html         {Univ. of Cologne, Germany}

http://super3.arcl.ed.ac.uk/baspmirror/basp.html {Univ. of Edinburgh, Scotland}

http://wings.buffalo.edu/anthropology/BASP       {Univ. at Buffalo, USA}

http://borealis.lib.uconn.edu/basp/basp.html     {Univ. of Connecticut, Storrs, USA}

Irwin Scollar

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From compgeom-owner@research.bell-labs.com  Thu Sep 10 14:50:09 1998
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Subject: transforms
From: al001@rs1.rrz.Uni-Koeln.DE (Irwin Scollar)
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Concerning raster transforms, there is a working Windows 95/98/NT 
program called AirPhoto with full documentation and references for the 
algorithms used in Windows Help format for transforming scanned color 
or black and white images to scanned maps with various transformations 
(projective, second order polynomial and projective with polynomial 
correction) and either nearest neighbor, binlinear or bicubic spline 
interpoloation  available for downloading and test from the following web 
sites: 


http://www.uni-koeln.de/~al001/basp.html         {Univ. of Cologne, Germany}

http://super3.arcl.ed.ac.uk/baspmirror/basp.html {Univ. of Edinburgh, Scotland}

http://wings.buffalo.edu/anthropology/BASP       {Univ. at Buffalo, USA}

http://borealis.lib.uconn.edu/basp/basp.html     {Univ. of Connecticut, Storrs, USA}

Irwin Scollar

From compgeom-owner@research.bell-labs.com  Fri Sep 11 22:55:20 1998
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Date: Wed, 9 Sep 98 15:16:03 EDT
From: Paul.Heckbert@HOSTESS.GRAPHICS.CS.CMU.EDU
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 | Date: Wed, 9 Sep 1998 11:48:48 -0400
 | From: yap@jinai.cs.nyu.edu (Chee Yap)
 | To: compgeom-announce@research.bell-labs.com
 | Subject: literature on transformation of images
 | 
 | Is there any open literature about the following
 | basic problem?  Given a raster image I, and a 
 | linear transformation T, to compute the new image T(I).  

The geometric part of this problem has no open problems that I know of,
but there are issues related to top-quality filtering (reconstruction,
sampling, and antialiasing) that raise some open problems in
multidimensional signal processing.

One such question:

    What is the ideal filter to use when resampling a transformed
    raster image while minimizing aliasing?

    I addressed this question in

	Fundamentals of Texture Mapping and Image Warping,
	Paul Heckbert, Master's thesis, UCB/CSD 89/516,
	CS Division, U.C. Berkeley, June 1989.
	http://www.cs.cmu.edu/~ph

    and answered it, I believe, for one definition of "ideal",
    but I have seen surprisingly little discussion of this problem
    elsewhere -- most people have apparently satisfied themselves with
    special case solutions for the cases of downsampling and upsampling
    (scaling a picture down and up, respectively).

There are some other interesting signal processing questions associated with
the multipass algorithms for performing affine transformations on images,
e.g. the 2-pass and 3-pass algorithms, respectively, of:

    Catmull & Smith, 3-D Transformations of Images in Scanline Order,
    Proc. SIGGRAPH '80, 1980

    Alan W. Paeth, A Fast Algorithm for General Raster Rotation,
    Graphics Interface '86, May 1986

i.e. how to do the filtering in these algorithms with highest quality results.

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From: Alex Wang <awang6@ford.com>
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Subject: Literature on boolean operations for 2D objects
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Hi, everyone,

Can anyone kindly point me to literature on the boolean operations
(intersection, union, difference, etc.) for 2D free-form objects? Any
information on public-domain implementations in this area would be even
more helpful.

Thank you in advance for your help.

Regards,
Alex Wang
Ford Motor Company


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From compgeom-owner@research.bell-labs.com  Sat Sep 12 23:16:27 1998
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To: "Alex Wang" <awang6@ford.com>, <compgeom-discuss@research.bell-labs.com>
Cc: <mewang@engin.umich.edu>
Subject: RE: Literature on boolean operations for 2D objects
Date: Sat, 12 Sep 1998 08:36:12 +0200
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> Can anyone kindly point me to literature on the boolean operations
> (intersection, union, difference, etc.) for 2D free-form objects?

Take a look at the http://propro.ru/leonov page.
You will find a lo of usefull information there, as well as some nice source
code.

Nebojsa Lazic,
NC Pro - CAD/CAM Solutions,
nlazic@eunet.yu


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From compgeom-owner@research.bell-labs.com  Fri Sep 18 15:25:18 1998
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Date: Fri, 18 Sep 1998 08:01:43 -0400 (EDT)
From: "Joseph O'Rourke" <orourke@grendel.csc.smith.edu>
To: compgeom-announce@research.bell-labs.com
cc: halpern@cs.cornell.edu, Ken Clarkson <clarkson@research.bell-labs.com>
Subject: Annoucing A Computing Research Repository
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Those who attended SoCG in June, or who read the minutes of the
business meeting posted here, will remember the discussion of
an impending eprint archive.  It is a reality as of September 15th.  
See the announcement below from Joe Halpern.  I encourage you all
to visit http://xxx.lanl.gov/archive/cs/intro.html and start
posting your papers to the archive.  Note that "computational
geometry" has its own subject area, just as we requested as
a result of the business meeting discussion.  

==========================================================================
Annoucing A Computing Research Repository

Researchers have made their papers available by putting them on personal
web pages, departmental pages, and on various ad hoc sites known only
to cognoscenti.  Until now, there has not been a single repository to 
which researchers from the whole field of computing can submit reports.  

This is about to change.  Through a partnership of ACM, the Los Alamos 
e-Print archive, and NCSTRL (Networked Computer Science Technical
Reference Library), an online Computing Research Repository (CoRR) is 
being established.  The Repository has been integrated into the 
collection of over 20,000 computer science research reports and other 
material available through NCSTRL (http://www.ncstrl.org) and will be 
linked with the ACM Digital Library.  Most importantly, the Repository 
will be available to all members of the community at no charge.

We encourage you to start using the Repository right away.  For more details,
see http://xxx.lanl.gov/archive/cs/intro.html.  That site provides 
information on how to submit documents, browse, search, and subscribe to 
get notification of new articles of interest.  Please spread the word 
among your colleagues and students.  CoRR will only gain in value as
more researchers use it.  

See http://www.acm.org/repository for a more detailed description of CoRR.    
==========================================================================


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From compgeom-owner@research.bell-labs.com  Fri Sep 18 19:24:15 1998
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From: "John Dickinson <John Dickinson"<dickijk@engga.uwo.ca>
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To: "compgeom-discuss <compgeom-discuss"<compgeom-discuss@research.bell-labs.com>
Subject: Numerical recipes in ????? | Graphic Gems
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Dear All,

I know this isn't exactly what the people on the list do but I didn't know
who else to ask.  Can anyone make any suggestions for books in the style
of Numerical Recipes in ??? for engineers like myself who often find
themselves doing computational number crunching as well as computational
geometry.

I have an old copy of the Numerical Recipes in C but it is time to get a
new one.  I would like a book that would also provide a more object
orientated approach to problems where it would help and would be a little
more indepth on optimization but doesn't overwhelm me with theorems of
convergency etc. 

Basically I need a application/use orientated book which discusses
strength and weeknesses of algorithms and application areas and gives me
references to more advanced literature if I need to pursue the theory ion
more depth.

What would be the closest equivalent book for Computational Geometry?
Would it be the Graphics Gems series?

John

--
-((Insert standard disclaimer here))-|----- Arthur Wellesley -------------- 
John Kenneth Dickinson               |      Duke of Wellington (1769-1852)
Grad. Student Mech. Eng. U.W.O.      |  "There is no mistake;
email: jkdickin@julian.uwo.ca        |   there has been no mistake;
http://publish.uwo.ca/~jkdickin/     |   and there shall be no mistake."


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From compgeom-owner@research.bell-labs.com  Fri Sep 18 20:44:08 1998
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On 18 Sep 98 at 10:31, John Dickinson wrote:

> [...] Basically I need a application/use orientated book which
> discusses strength and weeknesses of algorithms and application
> areas and gives me references to more advanced literature if I
> need to pursue the theory in more depth.
> 
> What would be the closest equivalent book for Computational
> Geometry? Would it be the Graphics Gems series?

The Graphics Gems series is a good starting point.  It continues in
a journal entitled 'journal of graphics tools' published by A K
Peters Ltd.  I would also recommend 

O'Rourke, J. Computational Geometry in C. Cambridge University Press, 
Cambridge, UK, 1994, 368 pp.

Regards,
Frank

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#########################################################################=
###

                            CALL FOR PARTICIPATION

                          15TH EUROPEAN WORKSHOP ON
                           COMPUTATIONAL GEOMETRY

                             March 15-16-17 1999=20

                        Palais des Congres, Antibes=20


#########################################################################=
####


The European Workshop on Computational Geometry will be held in 1999 at t=
he
Palais des Congr=E8s, Antibes Juan-Les-Pins, France.

The goal of the workshop is to bring together the researchers in
Computational Geometry, facilitating - through an informal scheme - the
diffusion of their most recent work.

-------------------------------------------------------------------------=
----

INVITED SPEAKERS:

    [*] Bernard Chazelle, Princeton University, and Ecole Polytechnique P=
aris.
    [*] Jeffrey S. Vitter, Duke University and INRIA Sophia-Antipolis.
    [*] Jean-Marie Laborde, IMAG Grenoble.


-------------------------------------------------------------------------=
----

PARTICIPATION:

All interested people are welcome, even if they do not intend to give a t=
alk.
Information about the workshop can be found on the CG'99 www home page. I=
n
order to receive further information by email, please subscribe to our
mailing list through the www page. Further information concerning the
workshop program as well as travel and accommodation will be sent to
participants in January 1999 as well as on the www page.

-------------------------------------------------------------------------=
----

CONTRIBUTIONS:

Participants are encouraged to give a 20 minutes presentation of their
work. A preliminary title and a brief abstract (1-3 pages) should be
submitted (either PS files by email or camera-ready papers by regular
mail) to the organizing committee before January 15th, 1999.
The workshop language will be English.
If the number of presentations is too large, a selection will be made by =
the
organizers.
No proceeding will be published but the abstracts will be collected and
distributed among the participants at the Workshop.
-------------------------------------------------------------------------=
----

ORGANIZING COMMITTEE:

      Jean-Daniel Boissonnat=20
      Herv=E9 Bronnimann (chair)=20
      Fr=E9d=E9ric Cazals=20
      Frank Da
      Olivier Devillers=20
      Pierre-Marie Gandoin
      Sylvain Pion=20
      Monique Teillaud=20
      Fran=E7ois Rebufat
      Mariette Yvinec=20

-------------------------------------------------------------------------=
----

ADDRESS: CG'99

CG'99  ---  Projet Prisme,=20
INRIA B.P. 93=20
2004 Route des Lucioles
06902 Sophia-Antipolis Cedex
France

E-mail: cg99@sophia.inria.fr
Fax:    +33 4.92.38.76.43
Phone:  +33 4.92.38.77.38

Deadline for submissions: January 15th, 1999

#########################################################################=
####



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From compgeom-owner@research.bell-labs.com  Sun Sep 20 03:18:05 1998
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From: "Joseph O'Rourke" <orourke@grendel.csc.smith.edu>
To: Frank Devai <fl.devai@sbu.ac.uk>
cc: "John Dickinson <John Dickinson" <dickijk@engga.uwo.ca>,
        compgeom-discuss@research.bell-labs.com
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On Fri, 18 Sep 1998, Frank Devai wrote:

> 
> O'Rourke, J. Computational Geometry in C. Cambridge University Press, 
> Cambridge, UK, 1994, 368 pp.
> 
Thanks for the recommendation.  Let me mention that the Second 
Edition is due out any day now.  The code has been available from
my Web site since June.	:-j

http://cs.smith.edu/~orourke/


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From compgeom-owner@research.bell-labs.com  Mon Sep 21 15:41:38 1998
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Subject: WSCG CFP/0 Graphics, Visualization & Interactive Digital Media 
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----------------------------------------------------------------
>>>     Sorry for duplicates - we lost all the data and just <<<
>>>     recovering - to be removed from the list, please     <<<
>>> REPLY to skala@kiv.zcu.cz  subj: REMOVE <e-mail address to be removed>
<<<
----------------------------------------------------------------

You have the very last opportunity to present your paper
                 before the year 2000
-----------------------------------------------------------

                    W S C G'99

    The 7-th International Conference in Central Europe
         on Computer Graphics, Visualization and
                Digital Interactive Media 99

                    in cooperation with

         EUROGRAPHICS and IFIP working group 5.10
         on Computer Graphics and Virtual Worlds

          will be held in February 8 - 12, 1999
        in Plzen at the University of West Bohemia
       close to PRAGUE, the capital of the Czech Republic

-----------------------------------------------------------------------
>> If you are willing to help us as a REVIEWER, please,              <<
>> fill in the form at the http://wscg.zcu.cz/reviewer.htm           <<
-----------------------------------------------------------------------
>>Spare WSCG'98 proceedings are still available - ask your librarian <<
>>to order one - form is available from  http://wscg.zcu.cz & WSCG99 <<
-----------------------------------------------------------------------

                         Conference Chairs
                         =================
     Nadia Magnenat Thalmann, MIRALab-CUI, Univ. of Geneva, Switzerland
           Vaclav Skala, Univ. of West Bohemia, Czech Republic

                 International Programme Committee
                 =================================
Bergougnoux,P.(F)    Chalmers,A.(UK)      Chen,J.(USA)      Fellner,D.(D)
Ferko,A.(SK)         Groeller,E.(A)       Hubbold,R.(UK)    Iones,A.(RU)
Jensen,W.H.(D)       Klein,R.(D)          Mockrzycki,V.(PL) Peroche,B.(F)
Pratt,M.(USA)        Rossignac,J.(USA)    Sbert, M.(ES)     Seidel,H.-P.(D)
Sillion,F.(F)        Slavik,P.(CR)        Slusalek,P.(D)    Sochor, J.(CR)
Strasser,W.(D)       Stuerzlinger,W.(USA) Szirmay-Kalos,L.(H) Tokuta,A.(USA)
Willis, P.(UK)       Wuetrich,C.(D)       Yagel, R.(USA)    Yukita,S.(J)
Zara, J.(CR)


                Sponsors and supporting organizations
                =====================================
              Digital Equipment, Hewlett Packard, IBM,
        Silicon Graphics, Intergraph, Bentley Systems, Microsoft


                     Information for authors
                     ========================
Deadline for contributions:  October 15, 1998
    original(full affiliation)
    +3 copies(non-affiliated)
    +electronic form in CORRECT Postscript
                                  to be compressed to gz format
    format A4 (strictly NOT B4, properly formated),
    8 pages including figures, tables etc.

Posters: same format, length restricted to 2 pages including pictures,
tables etc.
         If presented by an author will be printed in separate volume.

For details, please, see http://wscg.zcu.cz select WSCG'99


                        Topics included
                        ---------------
Fundamental algorithms, rendering and visualization, virtual reality,
animation and multimedia, medical imaging, geometric modelling and fractals,
graphical interaction, object-oriented graphics, WWW technologies,
standards,
computer vision, parallel and distributed graphics, computational geometry,
computer aided geometric design, CAD/CAM, DTP and GIS systems,
educational aspects of related fields, usage of graphics within mathematical
software (Maple, Mathematica, MathCAD etc.) in education

The program includes international books exhibition and video show, too.
                     ---------------------------------------------

                      W S C G '99 International Exhibition
                      ------------------------------------

Information for exhibitors: Please contact the organiser as soon as possible
--------------------------  for detailed information and conditions.

The WSCG98 Exhibition will be held in parallel. Top leading European and
Czech
companies active in computer graphics, visualization and computer vision,
CAD/CAM  and GIS systems, virtual reality, multimedia systems and others
will be presenting their latest products.

Special programme will be available, too.
-----------------

Accepted papers will be published in the Conference proceedings with ISBN.
They are reviewed by INSPEC, Cambridge Scientific Abstracts, InfoStore,
IEEE , ISI , AIMS , INIST and others for citations index and other purposes.

The best papers will be considered for possible publication in the Journal
of
Visualisation and Computer Animation, Computers&Graphics, The Visual
Computer,
Machine Graphics & Vision and others journals.



              Organizer and conference secretariat
              ------------------------------------
                            Vaclav Skala
                c/o Computer Science Dept., Univ.of West Bohemia
             Univerzitni 8, Box 314, 306 14 Plzen, Czech Republic

 e-mail: skala@kiv.zcu.cz Subject: INFO WSCG99
 tel.:+420-19-7491-188  fax:+420-19-7491-188
     fax:+420-19-7822-578


The latest information is available at:

  http://wscg.zcu.cz select WSCG'99

Information on all WSCG conferences:    http://wscg.zcu.cz

In case of any problems:                http://147.228.63.9




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Prof. Ing.Vaclav Skala,CSc.
University of West Bohemia,
Univerzitni 8, Box 314
306 14 Plzen-Bory
Czech Republic
Tel.: +420-19-7491-188, Fax: +420-19-7491-213
Secretary: Tel.: +420-19-7491-212
skala@kiv.zcu.cz,      http://herakles.zcu.cz/~skala
>> for WSCG conferences: http://wscg.zcu.cz <<

Affiliated with:

Multimedia Technology Research Centre,  University of Bath
BATH BA2 7AY,  UNITED KINGDOM
----------------------------------------------------------------------------
--------------------



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Subject: ICVC: 2nd Call-for-papers 
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Date: Tue, 22 Sep 1998 08:11:34 -0500 (CDT)
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Please note that the submission deadline is Oct. 15

   ***********************************************************

                       2nd CALL FOR PAPERS
                      ---------------------

                             ICVC99
          International Conference on Visual Computing
    Interaction, Modeling, Rendering, Animation, and 3D environments

                      February 23 - 26, 1999
                           Goa, India


                          Organized by
   International Federation for Information Processing (IFIP)
                         TC5 &  WG5.10
                    Computer Society of India

                http://www.ncst.ernet.in/~icvc99

   ***********************************************************

CONFERENCE THEME
----------------

An unstoppable revolution  is  underway, made  possible by the 
technological developments that enable  computing with visuals.
This new revolution is about real time access and sharing of digital
information consisting not only of texts and sounds but powerful
realistic or imagined visuals and explorable 3D worlds, enabling
truly interactive multiparticipant, multisensory, multimodal and
multimedia communication. The  next generation of computers will
build in audio, visual and 3D graphics processing capabilities at
the core level. This international conference in India will bring
together renowned world experts both from the academic and industrial
fields,  providing participants  with  the unique  opportunity  of
acquiring exciting technological know-how.

The primary theme of the conference is "Visual Computing" covering
all  aspects  and  domains -- 3D Geometry, Image-based Techniques,
Animation, Virtual Environments, User-interfaces, Web-based Graphics,
Hardware and Multimedia.  ICVC99  is structured  around a number of
theme programmes, with equal emphasis on technical content in each.


CONFERENCE TOPICS

Papers are  solicited  on  conference topics listed below and also on
any other topics that fall within the theme of the conference.

Geometry Simplification              Geometry Compression
Graphics and Geometric Algorithms    Modeling Curves/Surfaces/Solids/Volumes
Physically Based Modeling            Image-based Modeling and Rendering
Computer Animation                   Motion Simulation
Special Effects                      Global Illumination
Photorealistic Rendering             Digital Story Telling
3D HCI                               Virtual Environments 
Interactive Design                   Ease-of-Use for 3D Design
Web Based Graphics                   Tele-collaboration
Interactive 3D on the Internet       Secure Image/Video Communication
Image/Video Encoding/Compression     Visual Interfaces to Electronic Commerce
Multimedia                           CAD/CAM
Rapid Prototyping                    Computer-assisted Virtual Classrooms
Visualization of Business Data       Innovative Applications of Graphics
Virtual Humans and Artificial Life   Graphics Architectures


CALL FOR PAPERS
---------------

ICVC99 solicits original papers which either report new work, survey
or review  emerging  trends, or detail innovative  applications. All
submitted papers will be refereed and those accepted for presentation
at the conference will be  included in the Conference Proceedings, to
be published by Kluwer Academic Publishers (tentative).


IMPORTANT DATES

October  15, 1998 ...   Last date for receipt of submitted papers
November 25, 1998 ...   Notification of acceptance/rejection
December 20, 1998 ...   Last date for receiving final camera-ready
                        version of accepted paper

INFORMATION TO AUTHORS

Papers can be submitted by e-mail in PostScript, Microsoft Word or PDF
format to "icvc99@konark.ncst.ernet.in". Papers can also be submitted
in hard copy form for refereeing purposes. In that case, four copies of
the full paper in English, should be received by the ICVC99 Secretariat
in Mumbai (Bombay) on or before October 15, 1998.

The paper size must be limited to be within 2000 to 6000 words, including
a 200 word abstract.

ICVC99 Secretariat
National Centre for Software Technology,
Gulmohar Cross Road No. 9.
Juhu, Mumbai 400049, INDIA.
Tel    : 91 22 6201606
Fax    : 91 22 6210139
Telex  : 11 78260 NCST IN
e-mail : icvc99@konark.ncst.ernet.in
WWW    : http://www.ncst.ernet.in/~icvc99

All  submitted papers  must include a cover  sheet containing name,
address, telephone numbers, FAX and e-mail address of the person to
whom the correspondence regarding the paper should be addressed.

Each paper must contain:

* title
* name(s) and affiliation(s) of all the authors
* abstract of 200 words maximum
* keywords indicating principal categorization of the paper with
    respect to the conference themes
* text between 2000 and 6000 words, single or double sided
    limiting to a maximum of 30 double spaced A4 size pages
    including diagrams, figures, tables and photographs
* references giving full details, including page numbers, for
    cited books/articles



KEYNOTE ADDRESSES & INVITED TALKS
---------------------------------

ICVC99 includes a number of comprehensive talks on leading edge topics
in the theory and applications of Visual Computing. These are in the
form of keynote addresses, invited talks, tutorials and state of the
art reports, given by internationally renowned researchers in the field.


INDUSTRY PRESENTATIONS
-----------------------

A number of corporate level presentations by manufacturers and vendors
on their latest graphics/CAD hardware and software systems are planned.
These will provide an excellent opportunity to the vendors to present
their systems and solutions before the conference audience. For further
information, please contact the conference secretariat.


CONFERENCE CHAIR
----------------

Harish Mehta, Managing Director,
Onward Technologies,
62, MIDC, 13th Street,
Andheri (East), Mumbai 400 093, INDIA
Tel   : 91 22 8342244
Fax   : 91 22 8342223
e-mail: hmehta@novell.com



INTERNATIONAL PROGRAMME COMMITTEE
---------------------------------

PROGRAMME CHAIRS

Jose L. Encarnacao, Direktor
Fraunhofer-Institut fuer Graphische Datenverarbeitung
Rundeturmstrasse 6
D-64283 Darmstadt, GERMANY.
Tel   : +49-(0)6151/155-130 
Fax   : +49-(0)6151/155-430 
e-mail: jle@igd.fhg.de  

Jarek Rossignac, Director
Graphics, Visualization, and Usability Center
College of Computing, Room 241
Georgia Institute of Technology
Atlanta, GA 30332-0280, USA.
Phone : 404/894-0671,  
Fax   : 404/894-0673
e-mail: jarek@cc.gatech.edu

Sudhir P Mudur, Associate Director
National Centre for Software Technology,
Gulmohar Cross Road No. 9.
Juhu, Mumbai 400049, INDIA.
Tel   : 91 22 6201606
Fax   : 91 22 6210139
Telex : 11 78260 NCST IN
e-mail: mudur@ncst.ernet.in


CHAIRPERSONS FOR SPECIAL THEME PROGRAMMES

Digital Story Telling: The next API for Visual Computing
    Ken Perlin <perlin@cat.nyu.edu> 

3D Geometry: Representation, Simplification, and Compression
    Jarek Rossignac <jarek@cc.gatech.edu>

Image based Modeling and Rendering
    Heinrich Mueller <mueller@ls7.informatik.uni-dortmund.de>

Web Based Graphics and Tele-collaboration
    Jose L. Encarnacao <jle@igd.fhg.de>

Industrial Applications
    M. Mantyla <Martti.Mantyla@hut.fi>

Graphics Architectures
    W. Strasser <strasser@gris.uni-tuebingen.de>

Digital Image/Video Communication
    Christoph Busch <busch@igd.fhg.de>

Applications in Art, Culture and Heritage Documentation
    Sudhir Mudur <mudur@ncst.ernet.in>

Applications in Education and Training
    L. Miguel Encarnacao <mencarna@crcg.edu>

Human Media Technology for Human Centered Computing
    Nahum Gershon <gershon@mitre.org>


MEMBERS OF THE INTERNATIONAL PROGRAMME COMMITTEE

Ken Perlin                   perlin@cat.nyu.edu 
M. Mantyla                   Martti.Mantyla@hut.fi
W. Strasser                  strasser@gris.uni-tuebingen.de
Heinrich Mueller             mueller@ls7.informatik.uni-dortmund.de
Christoph Busch              busch@igd.fhg.de
L. Miguel Encarnacao         mencarna@crcg.edu
Nahum Gershon                gershon@mitre.org
Nadia Magnenat-Thalmann      Nadia.Thalmann@cui.unige.ch
Daniel Thalmann              thalmann@lig.di.epfl.ch
Alan Chalmers                alan@cs.bris.ac.uk
Sabine Coquillart            sabine.coquillart@inria.fr
Christoph M. Hoffmann        cmh@cs.purdue.edu
Andrew Glassner              glassner@microsoft.com
Hugues Hoppe                 nospam@microsoft.com
Ravi Janardan                janardan@cs.umn.edu
Erik Jansen                  fwj@duticg.twi.tudelft.nl
Arie Kaufman                 ari@cs.sunysb.edu
Jai Menon                    MENON@watson.ibm.com
W. Purgathofer               wp@cg.tuwien.ac.at
A. Rappoport                 arir@cs.huji.ac.il
L. Rosenblum                 rosenblum@ait.nrl.navy.mil
Ram D. Sriram                sriram@cme.nist.gov
M. Rui Gomes                 mrg@inesc.pt
J. Cunha                     jdc@lnec.pt
Amitabh Varshney             varshney@cs.sunysb.edu
Sumant Pattanaik             sumant@graphics.cornell.edu
G. Doumeingts                doumeingts@lap.u-bordeaux.fr
Ketil Bo                     ketil.bo@dynamic-imaging.no
Aristides Requicha           requicha@lipari.usc.edu
Dinesh Shikhare              dinesh@ncst.ernet.in
Prem Kalra                   pkalra@iitd.ernet.in
V. V. Kamat                  vvkamat@unigoa.ernet.in
Sanjay G. Dhande             sgd@iitk.ernet.in
Swamy Manohar                manohar@csa.iisc.ernet.in
Norman Badler                badler@central.cis.upenn.edu
Aderito Marcos               marcos@ccg.uc.pt
Andreas Schilling            schilling@uni-tuebingen.de
Reinhard Klein               Reinhard.Klein@uni-tuebingen.de
P. S. Grover                 psg@giasdla.vsnl.net.in



ABOUT THE LOCATION -- GOA
-------------------------

Goa shines brightly on the tourist map of the world. Not only does it 
offer the Sun, Sea and the Sand - but gleaming whitewashed churches with 
Portuguese-style facades pepper the hillsides, rice paddies and dense 
coconut palm groves, while crumbling forts guard rocky capes and estuary 
entrances.

Goa's 105 km coastline with it's 40 beaches, broken up with idyllic palm 
fringed beaches, pose a delight for swimmers, anglers, watersport buffs 
and sunbathers. Aside from all these - Goa is also known for the oldest 
church in Asia coupled with ancient Indian temples which present an 
amalgam of cultures seldom found anywhere else. Goa's well known for its
exotic fresh spices and its cuisine is well known for it's spice and variety 
in every corner of the world.


VENUE (tentative)

Cidade de Goa Beach Resort is a luxury beach resort designed like a
Portugese Hill town in a Goan setting. It is built in 5 split levels
immediately overlooking the sea and an exclusive beach private in character.
Bordering the beach are 22 acres of extensive lawns with nature trails,
hammocks, two garden restaurants, tennis courts and an exclusive health
farm. The ambience is ideal for a relaxed conference or a holiday.


FURTHER DETAILS
----------------

In order to ensure that you receive all further information
regarding registration and advance programme, please return this
form to the ICVC99 Conference Secretariat by e-mail or air-mail;
or fill in the form at the ICVC99 WWW site.

------------------------------------------------------------------
( )  I wish to receive the registration information and advance
     programme.

( )  I am interested in submitting a paper for conference

( )  I am interested in participating in vendor presentation
------------------------------------------------------------------
Title (Prof/Dr/Mr/Ms/...)
------------------------------------------------------------------
Last Name                First Name



------------------------------------------------------------------
Profession
------------------------------------------------------------------
Institute/Company                 Job Title



------------------------------------------------------------------
Mailing Address:




------------------------------------------------------------------
Tel No:                           Fax:
------------------------------------------------------------------
e-mail:                           Telex:
------------------------------------------------------------------


ICVC99 Secretariat
National Centre for Software Technology,
Gulmohar Cross Road No. 9.
Juhu, Mumbai 400049, INDIA.
Tel    : 91 22 6201606
Fax    : 91 22 6210139
Telex  : 11 78260 NCST IN
e-mail : icvc99@konark.ncst.ernet.in
WWW    : http://www.ncst.ernet.in/~icvc99



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                         3rd CGC Workshop on 
                        Computational Geometry

                         October 11-12, 1998 
                  Brown University, Providence, RI

                 http://www.cs.brown.edu/cgc/cgc98/

                            Sponsored by 
                 The Center for Geometric Computing 
                                and 
        The Department of Computer Science,  Brown University

We are pleased to announce the third annual fall Workshop on
Computational Geometry, sponsored by the Center for Geometric
Computing, continuing a tradition established by the Mathematical
Sciences Institute at SUNY-Stony Brook. The Center for Geometric
Computing is a collaborative center of Brown, Duke, and Johns Hopkins
Universities, and is funded by the U.S. Army Research Office.

NEW!

  * preliminary program
  * registration information
  * hotel information
  * local information (see http://www.cs.brown.edu/cgc/cgc98/) 


Scope and Format
----------------

The aim of this workshop is to bring together researchers from
academia, industry, and the Army to stimulate collaboration on
problems of common interest arising in geometric computations. Topics
to be covered include, but are not limited to
  
 * Algorithmic methods in geometry      * Experimental studies
 * I/O-scalable geometric algorithms    * Geometric data structures 
 * Animation of geometric algorithms    * Implementation issues
 * Computer graphics                    * Robustness
 * Solid modeling                       * Computer vision
 * Geographic information systems       * Robotics 
 * Computational metrology              * Computer-aided design
 * Graph drawing                        * Mesh generation

Following the tradition of the previous MSI and CGC Workshops on
Computational Geometry, the format of the workshop will be informal,
extending over 2 days, with several breaks scheduled for discussions.


Registration
------------

Registration will be on-site, but please send mail to cgc@cs.brown.edu
as soon as possible to indicate if you are coming. There will be a
nominal registration fee of $35, which includes the abstract booklet,
coffee breaks, lunches, and a reception. Credit cards cannot be
accepted.


Invited speakers
----------------

* Jadgish Chandra (U.S. Army Research Laboratory) 
* John Hughes (Brown University) 
* Joe Marks (Mitsubishi Electrical Research Laboratories) 
* Chee Yap (New York University) 



Program Committee
-----------------

  * Pankaj K. Agarwal       * Joseph S. B. Mitchell  
  * Lars Arge               * Franco P. Preparata
  * Michael T. Goodrich     * Roberto Tamassia
  * S. Rao Kosaraju         * Jeffrey S. Vitter 



Accommodations
-------------

Hotel space is very tight in Providence, so make your reservations as
soon as possible. Rooms have been reserved at the following places:

  Brown Guest Rooms. 401-863-7500. Hotel-style rooms conveniently
    located on the Brown campus, within walking distance from the
    conference site. One or two people: $85 (few rooms available) Mention
    the "CGC Workshop" when making reservations.

  Providence Biltmore. Kennedy Plaza, Providence, RI 02903;
    401-421-0700 or 1-800-294-7709 (phone), 401-455-3050 (fax). One
    person, one double bed: $120, $20 additional for second person (20
    rooms) Mention the "CGC Workshop" and ask for the Brown University
    rate when making reservations.

  Additional local hotels may have discounted rates: 
         Marriott. Charles & Orms, Providence, RI; 401-272-2400
           or 1-800-228-9290. 
         Holiday Inn. 21 Atwells Ave. (exit 21 off I-95),
           Providence, RI; 401-831-3900. 
         Days Inn. 200 India St. (exit 3 off I-195), 401-272-5577.
  The rate for Saturday night should be lower than that for Sunday night. 

Additional local information (transportation, weather, restaurants,
etc) can be found at our web site (http://www.cs.brown.edu/cgc/cgc98/).

Further questions can be directed to cgc@cs.brown.edu. 


Local Arrangements
------------------
  * Mary Andrade    (maa@cs.brown.edu)
  * Stina Bridgeman (ssb@cs.brown.edu)
  * Vasiliki Chatzi (vc@cs.brown.edu)



For more information about the workshop, send mail to
cgc@cs.brown.edu. Further information will be posted to our web site 
(http://www.cs.brown.edu/cgc/cgc98/) as soon as it is available.


Preliminary Program
--------------------

                       Sunday, October 11
                      --------------------

  9:00 - 10:00  Invited Talk : Chee Yap


 10:00 - 10:10  Short break


 10:10 - 10:30  Kasturi R. Varadarajan. 
                A divide-and-conquer algorithm for min-cost perfect
                matching in the plane.           

 10:30 - 10:50  Christian A. Duncan, Michael T. Goodrich and Stephen Kobourov. 
                Balanced Aspect Ratio Trees: An Introduction. 

 
 10:50 - 11:20  Coffee Break


 11:20 - 11:40  Jack Snoeyink. 
                Queries with Segments in Voronoi Diagrams. 

 11:40 - 12:00  Evanthia Papadopoulou and D.T. Lee. 
                L_infinity Voronoi diagrams and applications in VLSI
                Layout and Manufacturing. 

 12:00 - 12:20  Waldir L. Roque and Howie Choset.
                The Green Island Formation in Forest Fire Modeling
                with Voronoi Diagrams.  


 12:20 -  1:30  Lunch


  1:30 -  2:30 Invited Talk : Joe Marks
               Through Computational Geometry and Optimization.   


  2:30 -  2:40 Short break


  2:40 -  3:00 Ulrike Axen. 
               Computer Morse Functions on Triangulated Manifolds. 

  3:00 -  3:20 Vasiliki Chatzi. 
               Finding Basis Functions for Pyramidal Finite Elements. 

  
  3:20 -  3:50 Coffee Break
  

  3:50 -  4:10 Jean-Daniel Boissonnat and Franco P. Preparata. 
               Robust plane sweep for intersecting segments. 

  4:10 -  4:30 Nina Amenta, Marshall Bern, David Eppstein and Shang-Hua Teng. 
               Regression Depth and Center Points. 

  4:30 -  4:50 Rex A. Dwyer. 
               Voronoi Diagrams on Random Moving Points. 


  4:50 -  6:00 Reception




                       Monday, October 12
                      --------------------

  9:00 - 10:00  Invited Talk : Jadgish Chandra 


 10:00 - 10:10  Short break


 10:10 - 10:30  Yi-Jen Chiang and Claudio T. Silva. 
                External Memory Techniques for Isosurface Extraction
                in Scientific Visualization.  

 10:30 - 10:50  Subodh Kumar. 
                Incremental PSLG Triangulation for Surface Rendering.
 
 10:50 - 11:20  Coffee Break


 11:20 - 11:40  Christian A. Duncan, Michael T. Goodrich and 
                Stephen G. Kobourov. 
                Balanced Aspect Ration Trees and Their Use for Drawing
                Very Large Graphs.  

 11:40 - 12:00  Stina Bridgeman, Giuseppe Di Battista, Walter Didimo,
                Giuseppe Liotta, Roberto Tamassia and Luca Vismara.  
                Optimal Compaction of Orthogonal Representations. 

 12:00 - 12:20  Ashim Garg. 
                Interactive Graph Drawing Algorithms. 


 12:20 -  1:30 Lunch


  1:30 -  2:30 Invited Talk : John Hughes 


  2:30 -  2:40 Short break


  2:40 -  3:00 Jeff Erickson, Leonidas J. Guibas, Jorge Stolfi and Li Zhang.
               Separation-Sensitive Collision Detection for Convex Objects. 

  3:00 -  3:20 Julien Basch, Jeff Erickson, Leonidas J. Guibas, 
               John Hershberger and Li Zhang. 
               Kinetic Collision Detection Between Two Simple Polygons. 

  3:20 -  3:40 Erik D. Demaine, Martin L. Demaine and Joseph S. B. Mitchell. 
               Folding any Silhouette from a Strip. 
  

  3:40 -  4:10 Coffee Break


  4:10 -  4:30 Ala Eddine Barouni and Nejib Zaguia.
               Drawing Algorithms for Telecommunication Networks.

  4:30 -  4:50 Cao An Wang and Bo Ting Yang. 
               On Non Proximity-Drawbility of Maximal Planar Graphs. 

  4:50 -  5:10 Fujio Yamaguchi. 
               What is the Real Role of a Division Operation in a
               Computer-Aided Geometric Design System?  


-----------------------------------------------------------





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Date: Thu, 24 Sep 1998 09:14:09 -0400 (EDT)
From: "John Dickinson <John Dickinson"<dickijk@engga.uwo.ca>
To: "compgeom-discuss <compgeom-discuss"<compgeom-discuss@research.bell-labs.com>
Subject: Numerical Recipes, Computational Gems
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Dear All,

I got quite a few good responses back and will try to look up the several
references to:
- O'Rourke, J. Computational Geometry in C. Cambridge University Press,
Cambridge, UK, 1994, 368 pp.
- A well designed library, rather than a loose collection of gems, is
available in the form of the Computational Geometry Algorithms
Library (CGAL)
- The book treats the architecture, the implementation, and the use of the
LEDA system http://www.mpi-sb.mpg.de/~mehlhorn/LEDAbook.html.

Still no-one suggested any numerical recipes texts.
Anyone have anything to say about Numerical Methods and Software by
Kahauer, Moler and Nash?

John

--
-((Insert standard disclaimer here))-|----- Arthur Wellesley -------------- 
John Kenneth Dickinson               |      Duke of Wellington (1769-1852)
Grad. Student Mech. Eng. U.W.O.      |  "There is no mistake;
email: jkdickin@julian.uwo.ca        |   there has been no mistake;
http://publish.uwo.ca/~jkdickin/     |   and there shall be no mistake."


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Washington University in Saint Louis
Department of Computer Science

Applications are invited for tenure-track faculty positions at the
Assistant, Associate and Full Professor levels. Applicants should hold a
doctorate in Computer Science or a closely related field, have a record of
accomplishment in research, and demonstrate a strong commitment to teaching.

Washington University is a leading private national university recognized
for its world class intellectual contributions (20 Nobel Prize Laureates
have been associated with the University), its exceptional resources (an
endowment of $2.8 billion, among the largest in the nation), and its
location in the midst of a delightful residential community which places
much value on education and culture.  With annual external research funding
in the range of $6 million, Computer Science is emerging as one of the
preeminent departments in the University and the School of Engineering and
Applied Science.  Over the next several years, the Department plans to
expand its size from 15 to 20 regular faculty.  This aggressive growth
pattern will be accompanied by commensurate increases in departmental
resources.

The Department seeks outstanding candidates likely to develop synergistic
relationships with existing areas of excellence within the department:
networking and communications; distributed computing and object-oriented
software technologies; graphics, visualization, and human interfaces;
artificial intelligence; computer architecture and engineering; theoretical
computer science, algorithms, and  programming languages; and computational
science with emphasis on biomedical applications.  With the strong backing
of the University and the School, the Department is committed to making
significant investments in promising new areas of study and to providing
the kind of resources and environment that will enable new faculty members
to flourish intellectually.  Academic couples seeking to co-locate are
strongly encouraged to apply.   Research groups in search of a highly
supportive institutional environment may also want to consider relocating
to Washington University.

For more information on our department, see our World Wide Web page at
http://www.cs.wustl.edu.

Qualified applicants should send a curriculum vita and the names and
addresses of at least three references to Dr. Catalin Roman, Chairman,
Department of Computer Science, Campus Box 1045, Washington University, One
Brookings Drive, St. Louis, MO 63130-4899.

Applications will be considered as they are received. Those received after
February 1, 1999, may not receive full consideration.  Washington
University is an equal opportunity/affirmative action employer.



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From: Federico Carminati <Federico.Carminati@cern.ch>
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To: compgeom-discuss@research.bell-labs.com
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Dear All,
   I am desperately trying to assemble all the geometrical and material
information (composition and density) I can find on the space shuttle. Can
you help me with drawings, plans, cad databases and so on? Thank you in
advance for the attention and best regards,



                                            Federico Carminati


==============================================================================
||                                                                          ||
||                _/_/_/_/_/_/_/        _/_/_/_/           _/               ||
||               _/                   _/      _/         _/ _/              ||
||              _/                  _/                 _/   _/              ||
||             _/_/_/_/_/_/       _/                 _/     _/              ||
||            _/                 _/                _/       _/              ||
||           _/                 _/               _/ _/_/_/_/_/              ||
||          _/                  _/       _/    _/           _/              ||
||         _/                    _/_/_/_/    _/             _/              ||
||                                                                          ||
==============================================================================
|| Federico Carminati             ||  Tel.: +41.22.767.4959                 ||
|| CERN-EP                        ||  Fax.: +41.22.767.9075                 ||
|| 1211 Geneva 23                 ||                                        ||
|| Switzerland                    ||                                        ||
==============================================================================



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Subject: Vision Geometry VIII: Call for Papers
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                  Vision Geometry VIII (SD90)

              Part of SPIE's International Symposium on
          Optical Science, Engineering, and Instrumentation
 18-23 July 1999 * Colorado Convention Center * Denver, Colorado USA
------------------------------------------------------------------------

Conference Chairs: Longin J. Latecki, Univ. Hamburg (Germany); Robert A.
Melter, Long Island Univ. (Retired); David M. Mount, Univ. of
Maryland/College Park; Angela Y. Wu, American Univ.

Program Committee: Gilles Bertrand, Lab. PSI (France); Ari D. Gross,
CUNY/Queens College; Atsushi Imiya, Chiba Univ. (Japan); Reinhard Klette,
Univ. of Auckland (New Zealand); T. Y. Kong, CUNY/Queens College; Jack
Koplowitz, Clarkson Univ.; Ivan Stojmenovic, Univ. of Ottawa (Canada)

Keynote Speaker: Robert M. Haralick, Univ. of Washington

This conference is designed to bring together workers who use geometric
theory and techniques to solve problems related to computer vision.
Specific solutions as well as overviews of more general topics are welcome.


Topics of interest are:

* 	digital geometry and topology
* 	geometry-based image segmentation            
* 	morphology related to vision
* 	computational geometry related to vision
* 	convexity problems in vision
* 	shape description and similarity measures.

Abstract Due Date: 21 December 1998
Manuscript Due Date: 21 June 1999

For more information on the Annual Meeting or a complete listing of all
conferences please go to our SPIE Web site:
www.spie.org/info/annualmeeting.html

------------------------------------------------------------------------
YOUR ABSTRACT SHOULD INCLUDE ALL OF THE FOLLOWING:

1. SUBMIT TO: CONFERENCE CODE, CONFERENCE CHAIR (Example: SD00, SMITH)

2. CONFERENCE TITLE: (submit each abstract to one conference only)

3. ABSTRACT TITLE

4. AUTHOR LISTING (principal author first)
   First (given) name  Last (family) name, Affiliation
   Mailing address, telephone, fax, and email address.

5. PRESENTATION: Indicate your preference for "Oral Presentation" or "Poster

   Presentation." Placement is subject to chairs' discretion.

6. ABSTRACT TEXT: Approximately 250 words.

7. KEYWORDS: List a maximum of five keywords.

8. BRIEF BIOGRAPHY (of principal author): Approximately 50 words.

------------------------------------------------------------------------
INSTRUCTIONS FOR SUBMITTING AN ABSTRACT
Please choose only *one* of the following options and send by the due date:

1. SPIE WEB - Complete the convenient form found on the SPIE Web site:
   www.spie.org/forms/sd99_submission_form.html

2. E-MAIL each abstract separately to: abstracts@spie.org in ASCII text
   (not encoded) format. IMPORTANT: to ensure receipt and proper processing
 of
   your abstract, the Subject line must include only the following:
     SUBJECT: Conference Code, Conference Chair (Example: SD00, Smith)

3. MAIL three copies of your abstract to:
   OPTICAL SCIENCE, ENGINEERING, AND INSTRUMENTATION
   SPIE, P.O. Box 10, Bellingham, WA  98227-0010 USA
   Shipping Address: 1000 20th St., Bellingham, WA 98225 USA
   Telephone 360/676-3290

4. FAX one copy to SPIE at 360/647-1445 (send each abstract separately).

------------------------------------------------------------------------
CONDITIONS OF ACCEPTANCE
* Authors are expected to secure registration fees and travel and
  accommodation funding, independent of SPIE, through their
  sponsoring organizations before submitting abstracts.
* Only original material should be submitted.
* Commercial papers, descriptions of papers, with no research/
  development content, and papers where supporting data or a
  technical description cannot be given for proprietary reasons
  will not be accepted for presentation in this symposium.
* Abstracts should contain enough detail to clearly convey the
  approach and the results of the research.
* Government and company clearance to present and publish should
  be final at the time of submittal.
* Applicants will be notified of acceptance by mail no later than
  26 April 1999. Early notification of acceptance will be placed
  on the SPIE Web site, the week of 26 March 1999 at:
  www.spie.org/info/annualmeeting.html

------------------------------------------------------------------------
PAPER REVIEW
To ensure a high-quality conference, all abstracts and Proceedings of SPIE
papers will be reviewed by the Conference Chairs for technical merit and
content.

PUBLISHING POLICY
Manuscript due dates must be strictly observed. Whether the conference
volume will be published before or after the meeting, late manuscripts run
the risk of not being published in the Proceedings of SPIE. The objective
of this policy is to better serve the conference participants and the
technical community at large. Your cooperation is appreciated by all.

ORAL OR POSTER PRESENTATION
Instructions for Oral and Poster presentations will be included in your
author kit. All Oral and Poster presentations are included in the
Proceedings of SPIE and require a manuscript.

PROCEEDINGS
These conferences will result in volumes published in the Proceedings of
SPIE that can be ordered through the Advance Technical Program.
Camera-ready manuscripts are required of all accepted applicants and must
be submitted in English by 21 June 1999. Copyright to the manuscript is
expected to be released for publication in the Proceedings of SPIE. **Note:
If an author does not attend the meeting and make a presentation, the chair
may choose not to publish the author's manuscript in the conference volume.
Papers published are indexed in leading scientific databases including
INSPEC, Compendex Plus, Physics Abstracts, Chemical Abstracts,
International Aerospace Abstracts, and Index to Scientific and Technical
Proceedings.

PARTICIPANT REGISTRATION FEE
Authors and coauthors are accorded a reduced symposium registration fee.
Participants who attend the symposium and pay the author fee may also
apply for a six-month, nonvoting membership in SPIE if never before a
member (membership includes OE Reports and choice of SPIE's journals).
Details are available at the on-site registration desk or by contacting
SPIE Member Services: membership@spie.org; or call 360/676-3290.



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============================================================================
                    Ninth Annual International Symposium
                        on Algorithms and Computation
============================================================================

                            December 14-16, 1998
                        Riviera Hotel, Taejon, Korea

                                 Hosted by
       KAIST(Korea Advanced Institute of Science and Technology) and
                  KISS(Korea Information Science Society)

                                Sponsored by
            MIC (Ministry of Information and Communication) and
              KOSEF (Korea Science and Engineering Foundation)


This symposium is intended to provide a forum for researchers working in
algorithms and theory of computation. It will be held in Taejon which is
famous with hot spring resort and historical landmarks of the ancient(18
B.C-A.D.660) civilization. Taejon is also surrounded by beautiful mountains
- Kyeryoung, Daedoon and Pomun. Co-host KISS has been the professional
organization in Korea for those in computer and information sciences since
1973. The symposium is hosted in celebration of KISS's 25th anniversary.

Organization
------------
  o Program Committee Chair

   * Kyung-Yong Chwa (Co-Chair; KAIST, Korea)
   * Oscar Ibara (Co-Chair; UC Santa Barbara, USA)

  o Program Committee

   * Takao Asano (Chuo U., Japan)
   * Ding-Zhu Du (U. of Minnesota, USA)
   * Susanne Hambrusch (Purdue U., USA)
   * Hiroshi Imai (U. of Tokyo, Japan)
   * Tao Jiang (McMaster U., Canada)
   * Sam Kim (Kyungpook Nat. U., Korea)
   * D.T. Lee (Northwestern U., USA)
   * Ming Li (U. of Waterloo, Canada)
   * Pandu Rangan (IIT, Madras, India)
   * Sartaj Sahni (U. of Florida, USA)
   * P. Spirakis (Comp. Tech. Inst., Patras, Greece)
   * Roberto Tamassia (Brown U., USA)
   * Shanghua Teng (U. of Illinois, USA)
   * Osamu Watanabe (Tokyo Inst. Tech., Japan)
   * Peter Widmayer (ETH, Zurich, Switzerland)
   * Chee K. Yap (Courant Inst. NYU, USA)
   * Hsu-Chun Yen (National Taiwan U., Taiwan)

  o Organizing Committee Chair

   * Jik Hyun Chang (Sogang U., Korea)

  o Organizing Committee
   * Hee-Chul Kim (Hankuk U. of Foreign Studies, Korea)
   * Sang-Ho Lee (Ewha Womans U., Korea)
   * Kunsoo Park (Seoul National U., Korea)

Invited Speaker
---------------
      o Bernard Chazelle(Princeton University and Ecole Polytechnique)
             "The Discrepancy Method"
      o Roberto Tamassia(Brown University)
             "Implementing Algorithms and Data Structures:
              an Educational and Research Perspective"

Preliminary Program
-------------------  
 Sunday, December 13, 1998
 6:00  Early Registration
 8:00  Welcome Reception

 Monday, December 14, 1998
 8:30  Registration
 9:20  Opening Address

 Invited Presentation
 9:30  The Discrepancy Method - Abstract
       Bernard Chazelle (Princeton and Ecole Polytechnique)
 Coffee Break: 10:30 -- 11:00

 Session 1A: Geometry I
 11:00 $L_\infty$ Voronoi Diagrams and Applications to VLSI Layout and
       Manufacturing
       Evanthia Papadopoulou
 11:30 Facility Location on Terrains
       Boris Aronov, Marc van Kreveld, René van Oostrum, Kasturirangan
       Varadarajan
 12:00 Computing Weighted Rectilinear Median and Center Set in the Presence
       of Obstacles
       Joonsoo Choi, Chan-Su Shin, Sung Kwon Kim

 Session 1B: Complexity I
 11:00 Maximizing Agreement with a Classification by Bounded or Unbounded
       Number of Associated Words
       Hiroki Arimura, Shinichi Shimozono
 11:30 Disjunctions of Horn Theories and their Cores
       Thomas Eiter, Toshihide Ibaraki, Kazuhisa Makino
 12:00 Checking Programs Discreetly: Demonstrating Result-Correctness
       Efficiently While Concealing It
       Giovanni Di Crescenzo, Kouichi Sakurai, Moti Yung
 Lunch: 12:30 --- 2:00

 Session 2A: Graph Drawing
 2:00  Two-Layer Planarization in Graph Drawing
       Petra Mutzel, René Weiskircher
 2:30  Computing Orthogonal Drawings in a Variable Embedding Setting
       Walter Didimo, Giuseppe Liotta
 3:00  Dynamic Grid Embedding with Few Bends and Changes
       Ulrik Brandes, Dorothea Wagner

 Session 2B: On-line Algorithm and Scheduling
 2:00  Two New Families of List Update Algorithms
       Frank Schulz
 2:30  An Optimal Algorithm for On-line Palletizing at Delivery Industry
       J. Rethmann, E. Wanke
 3:00  On-Line Scheduling of Parallel Jobs with Runtime Restrictions
       Stefan Bischof, Ernst W. Mayr
 Coffee Break: 3:30 -- 4:00

 Session 3A: CAD/CAM and Graphics
 4:00  Testing the Quality of Manufactured Disks and Cylinders
       Prosenjit Bose, Pat Morin
 4:30  Casting with Skewed Ejection Direction
       Hee-kap Ahn, Siu-Wing Cheng, Otfried Cheong
 5:00  Repairing Flaws in a Picture Based on a Geometric Representation of
       a Digital Image
       Tetsuo Asano, Hiro Ito, Souichi Kimura, Shigeaki Shimazu

 Session 3B: Graph Algorithm I
 4:00  k-Edge and 3-Vertex Connectivity Augmentation in an Arbitrary
       Multigraph
       Toshimasa Ishii, Hiroshi Nagamochi, Toshihide Ibaraki
 4:30  Polyhedral Structure of Submodular and Posi-modular Systems
       Hiroshi Nagamochi, Toshihide Ibaraki
 5:00  Maximizing the Number of Connections in Optical Tree Networks
       Thomas Erlebach, Klaus Jansen

 Tuesday, December 15, 1998

 Invited Presentation
 9:00  Implementing Algorithms and Data Structures: an Educational and
       Research Perspective - Abstract
       Roberto Tamassia (Brown)

 Session 4: Best Paper Presentation
 10:00 Selecting the k Largest Elements with Parity Tests
       Tak Wah Lam, Hing Fung Ting
 Coffee Break: 10:30 -- 11:00

 Session 5A: Randomized Algorithm
 11:00 Randomized K-Dimensional Binary Search Trees
       Amalia Duch, Vladimir Estivill-Castro, Conrado Martínez
 11:30 Randomized O(log log n)-Round Leader Election Protocols in Packet
       Radio Networks
       Koji Nakano, Stephan Olariu
 12:00 Random Regular Graphs with Edge Faults: Expansion through Cores
       Andreas Goerdt

 Session 5B: Complexity II
 11:00 A Quantum Polynomial Time Algorithm in Worst Case for Simon's
       Problem
       Takashi Mihara, Shao Chin Sung
 11:30 Generalized Graph Colorability and Compressibility of Boolean
       Formulae
       Richard Nock, Pascal Jappy, Jean Sallantin
 12:00 On the Complexity of Free Monoid Morphisms
       Klaus-Jörn Lange, Pierre McKenzie
 Lunch: 12:30 --- 2:00

 Session 6A: Graph Algorithm II
 2:00  Characterization of Efficiently Solvable Problems on
       Distance-Hereditary Graphs
       Sun-Yuan Hsieh, Chin-Wen Ho, Tsan-Sheng Hsu, Ming-Tat Ko, Gen-Huey
       Chen
 2:30  Fast Algorithms for Independent Domination and Efficient Domination
       in Trapezoid Graphs
       Yaw-Ling Lin
 3:00  Finding Planar Geometric Automorphisms in Planar Graphs
       Seok-Hee Hong, Peter Eades, Sang-Ho Lee

 Session 6B: Combinatorial Problem
 2:00  A New Approach for Speeding Up Enumeration Algorithms
       Takeaki Uno
 2:30  Hamiltonian Decomposition of Recursive Circulants
       Jung-Heum Park
 3:00  Convertibility among Grid Filling Curves
       Tetsuo Asano, Naoki Katoh, Hisao Tamaki, Takeshi Tokuyama
 Coffee Break: 3:30 -- 4:00

 Session 7A: Geometry II
 4:00  Generalized Self-Approaching Curves
       Oswin Aichholzer, Franz Aurenhammer, Christian Icking, Rolf Klein,
       Elmar Langetepe, Günter Rote
 4:30  The Steiner Tree Problem in $\lambda_4$-geometry Plane
       Guo-Hui Lin, Guoliang Xue

 Session 7B: Computational Biology
 4:00  Approximation and Exact Algorithms for RNA Secondary Structure
       Prediction and Recognition of Stochastic Context-free Languages
       Tatsuya Akutsu
 4:30  On the Multiple Gene Duplication Problem
       Michael Fellows, Michael Hallett, Ulrike Stege

 7:00     Conference Banquet

 Wednesday, December 16, 1998

 Session 8A: Geometry III
 9:00  Visibility Queries in Simple Polygons and Applications
       Boris Aronov, Leonidas J. Guibas, Marek Teichmann, Li Zhang
 9:30  Quadtree Decomposition, Steiner Triangulation, and Ray shooting
       Siu-Wing Cheng, Kam-Hing Lee
 10:00 Optimality and Integer Programming Formulations of Triangulations in
       General Dimension
       Akira Tajima

 Session 8B: Approximation Algorithm
 9:00  Space-efficient Approximation Algorithms for MAXCUT and COLORING
       Semidefinite Programs
       Philip N. Klein, Hsueh-I Lu
 9:30  A Capacitated Vehicle Routing Problem on a Tree
       Shin-ya Hamaguchi, Naoki Katoh
 10:00 Approximation Algorithms for Some Optimum Communication Spanning
       Tree Problems
       Bang Ye Wu, Kun-Mao Chao, Chuan Yi Tang
 Coffee Break: 10:30 -- 11:00

 Session 9A: Complexity III
 11:00 The Edge-Disjoint Paths Problem is NP-Complete for Partial k-Trees
       Xiao Zhou, Takao Nishizeki
 11:30 Inapproximability Results for Guarding Polygons without Holes
       Stephan Eidenbenz
 12:00 The Inapproximability of Non NP-hard Optimization Problems
       Liming Cai, David Juedes, Iyad Kanj

 Session 9B: Parallel and Distributed Algorithm
 11:00 An Efficient NC Algorithm for a Sparse $k$-Edge-Connectivity
       Certificate
       Hiroshi Nagamochi, Toru Hasunuma
 11:30 A Parallel Algorithm for Sampling Matchings from an Almost Uniform
       Distribution
       J. Diaz, J. Petit, P. Psycharis, M. Serna
 12:00 Optimal Approximate Agreement with Omission Faults
       Richard Plunkett, Alan Fekete

 12:30: Lunch

Proceedings
-----------
Accepted papers will be published in the proceedings of the
symposium(Lecture Notes in Computer Science, Springer-Verlag).
Some selected papers will appear in Theoretical Computer Science
as special issues.

Further Information
-------------------
If you have any question and request, do not hesitate to ask us. Fax number
is +82-42-869-3510 and e-mail address is isaac98@jupiter.kaist.ac.kr.
The detailed information for transportation(including time tables for buses 
and trains), conference site map, and tourist attractions can be found 
at our web site: http://jupiter.kaist.ac.kr/~isaac98/

General Information
-------------------
  * Location
ISAAC'98 will be held at Riviera Hotel in Taejon. Taejon city is situated in
the geographical center of South Korea. The city of 1.3 million is also
surrounded by historical landmarks of the ancient Paekche civilization(18B.C
- A.D.660)
Mt.Daedoon Provincial Park, Mt.Kyeryoung National Park, Mt.Pomun Park and
Yusung, Korea's famous hot spring resort are all within a 30 minute drive.

  * Weather
Weather in December is mostly cold with occasional snows. Temperature ranges
between -5 degrees Centigrade and -2.5 degrees Centigrade(23F - 27.5F).

  * Currency Exchange
US $1 is about 1350 won. But nowadays, the exchange rate is fluctuating very
much. You can get the current exchange rate from internet.
(http://www.koexbank.co.kr/exchange_rating/newexchange2.html)
The unit of Korean currency is the "won". Coin denominations are 10 won, 50
won, 100 won, 500 won. Bank notes are 1,000 won, 5,000 won, 10,000 won.
Foreign bank notes and traveler's checks can be converted into Korean won at
foreign exchange banks and other authorized money changers. Credit cards,
including VISA and Master Cards are accepted at hotels, department stores
and restaurants.

  * Passport and Visa
Every foreign visitor entering Korea must present a valid passport.
Delegates from countries requiring visas should apply at the Korean consular
offices of diplomatic missions in their respective countries before their
departure. Visitors from some countries may stay 15 days without VISA. For
the details, participants are advised to contact their local travel agent,
carrier or Korean diplomats.

Accommodation
-------------
Two hotels have been chosen as standard lodging for the conference. 
One is Riviera hotel(the conference venue), and the other is Top hotel
(within easy walking distance to Riviera Hotel).
We have arranged for special conference rates at these hotels. 
You can find more detailed information in the registration/accommodation 
form below.

Transportation
--------------
   o Conference Location

     The conference location, Taejon city, is located at the center of
     Korea's transportation network - about 100 miles south from Seoul and
     200 miles north from Pusan. Seoul(Kimpo) airport and Pusan(Kimhae)
     airport are two major airports, but there is no direct public
     transportation to the conference venue. 

   o How to get there
	Refer to the Web page at http://jupiter.kaist.ac.kr/~isaac98/
	In the Web page, you can obtain the detail information about
	the tranportation.
	

Registration
------------
You can register ISAAC'98 early by FAX or postal mail. There is
also Hotel reservation form in this registration form.

   * Pre-registration Deadline: November 6, 1998
   * Hotel information -- here
   * Registration fee
    ------------------------------------------------------------------
            Before November 6,1998    After November 6, 1998/On-site
    ------------------------------------------------------------------
    Regular           US $300                  US $360

    Student           US $200                  US $240
    ------------------------------------------------------------------

    Please, complete the form(with the  payment) and send it to the
    following address(FAX or postal mail only):

      Fax:    +82-2-360-2306
      Address:Ms. Cho, Tae-Nam
              Dept. of Computer Science and Engineering
              College of Engineering, Ewha Womans University
              11-1 Daehyun-dong, Seodaemun-ku, Seoul, Korea 120-750
      (E-Mail:isaac98@mm.ewha.ac.kr)

------------------------------ cut here -----------------------------------

=======================================================================
             ISAAC'98 REGISTRATION/ACCOMMODATION FORM 
=======================================================================

                          Mail or fax to:
      Ms. Cho, Tae-Nam, Dept. of Computer Science and Engineering
           College of Engineering, Ewha Womans University,
        11-1 Daehyun-dong, Seodaemun-ku, Seoul, Korea 120-750
                       Fax: +82-2-360-2306


__ Male        __ Female
__ Dr.      __ Prof.     __ Researcher & Engineer    __ Student
__ Other (please specify)_________________

Family name:_________________ Given name:_________________

Affiliation:_________________________________________

Address:_____________________________________________

_____________________________________________________

_____________________________________________________

Phone:_________________  Fax:________________________

Email:_______________________________________________


------------------------------------------------------
 Registration      Before Nov. 6      After Nov. 6 
======================================================
   Regular          US $300 ___         US $360 ___

   Student          US $200 ___         US $240 ___
------------------------------------------------------
Registration covers a copy of proceedings, reception on Dec. 13,
3 lunches, coffee and banquet on Dec. 15.  
The student fee does not include the banquet.

-----------------------------------------------------
Additional Tickets          Number        Amount
=====================================================
Banquet(US $50 each)        ______        ______
-----------------------------------------------------

-----------------------------------------------------------
Hotel Rates(Daily rates in US dollars per room (incl.tax).)
===========================================================
Category          Riviera (4 star)        Top 
===========================================================
Single(1)          95,000 won ___      39,000 won ___
Double(2)         105,000 won ___      48,000 won ___
Ondol(2)           95,000 won ___      39,000 won ___
-----------------------------------------------------------
(Ondol means a Korean traditional room which is heated by 
Korean under-floor heating system. There are no beds in 
the Ondol room. US $1 is about 1350 won. The exchange rate
is fluctuating very much.)

Arrival Date:_____________   Departure Date:_____________ 

I wish to share my room with:____________________________

(We will make a hotel reservation for you. To guarantee your 
reservation, a nonrefundable deposit(US $50) is required.  
The remaining hotel charge should be paid directly to the hotel.)


Grand Total
============
Registration fee + Room deposit + Banquet tickets 
                                    (optional)
= _______________


Payment
========
All payments should be made in US dollar through one of the
following means. Bank transfer is highly recommended.

* Bank transfer  
----------------
Name of the bank: Korea Exchange Bank Pangbaidong branch,
                  Seoul, Korea

Account number: 099-JSD-100740

Name of Account holder : KISS

Please enclose a copy of the bank transfer when sending the
registration form. 

* By credit card. Please complete
-----------------
  ___ VISA                   ___ MASTER

Card Number:_____________________________________________

Card Holder Name:________________________________________

Card Holder Address:_____________________________________

_________________________________________________________

Expires:_____________  Signature:________________________

Registration/reservation will be confirmed only after
payment has been received.

Cancellation
=============
In case of the cancellation, written notification should be 
sent to Ms. Cho, Tae-Nam. Registration fee, excluding 20% of 
the fee, will be refunded only for cancellations made before 
November 6, 1998. No refunds will be given for cancellations 
made after this date.


-------------
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To: compgeom-announce@research.bell-labs.com
From: Jarek Rossignac <jarek@gvu.gatech.edu>
Subject: October 29 submission deadline  for ACM I3DG
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Every two years, the ACM Symposium on Interactive 3D Graphics (I3DG) brings
together students, young researchers, pioneers, and industry decision
makers in interactive 3D graphics technologies and applications. It gives
you the opportunity to present your work, check on the latest trends, to
recruit, to find jobs, and to establish new collaborations.

The I3DG'99 Symposium will take on April 26-28, 1999 in Atlanta and will be
hosted by the GVU Center. Further information is available at
http://www.gvu.gatech.edu/i3dg/. Please note that the deadline for paper
submission is October 29, 1998 with en Email abstract requested by October
15.

Please do the effort now to submit your best work in this area and be so
kind as to remind your colleagues of this opportunity. Thank you
 - Jarek Rossignac, Chair

__________________________________________
Jarek Rossignac, Professor and Director
      GVUCenter <http://www.gvu.gatech.edu/>
      College of Computing, Room 241
      Georgia Institute of Technology
      801 Atlantic Drive, NW
      Atlanta, GA 30332-0280
          Phone: 404/894-0671,  Fax:  404/894-0673
          mailto:jarek@cc.gatech.edu
          http://www.gvu.gatech.edu/people/faculty/jarek.rossignac/

For schedule related issues, please ontact and CC:
Vicky Skelton, 404/894-0075, mailto:vskelton@cc.gatech.edu

Note that GVU will host the 1999 ACM Symposium on
Interactive 3D Graphics: http://www.gvu.gatech.edu/i3dg/
Papers should be submitted before October 29, 1998.

Also note that the International Conference on Visual Computing
(ICVC99) will be held in Goa, India, February 23-26, 1999:
http://www.ncst.ernet.in/~icvc99
Papers should be submitted before October 15, 1998.



-------------
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From: Marshall Bern <bern@parc.xerox.com>
To: compgeom-announce@research.bell-labs.com
Subject: Call for Papers - ACM Symp. on Computational Geometry
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                  CALL FOR PAPERS

           Fifteenth Annual ACM Symposium on
                 COMPUTATIONAL GEOMETRY
 
                   June 13--16, 1999
                 Miami Beach, Florida

          http://www.cs.miami.edu/events/SCG99/

            Sponsored by ACM SIGACT & SIGGRAPH
 
 
The 1999 ACM Symposium on Computational Geometry, featuring
an applied track, a theoretical track, and a video review,
will be held at the Radisson Deauville Resort in Miami Beach, Florida.
We invite submissions that address
  applications of geometric computing, for the applied track, or
  fundamental problems of geometric computing, for the theoretical track.
During the conference, sessions of presentations will alternate between
the two tracks, rather than being in parallel.  The proceedings,
with the papers of both tracks, will be distributed at the symposium
and will subsequently be available for purchase from ACM.  A selection
of papers will be invited to special issues of journals.
The conference will accept electronic submissions of postscript files;
guidelines will be available via the conference homepage, given above.


Topics for the applied track include, but are not limited to
  experimental analysis of algorithms and data structures;
  robotics and virtual worlds;
  computer graphics, simulation and visualization;
  image processing;
  geometric and solid modeling;
  computer aided geometric design;
  manufacturing;
  geographical information systems.
Electronic submissions are preferred, but authors may instead
mail 14 copies of an extended abstract to arrive by December 4, 1998 to:

  John Canny 
  Computer Science Division 
  529 Soda Hall 
  Berkeley, CA 94720-1776
  Phone:  (510) 642-9955 
  jfc@cs.berkeley.edu

Topics for the theoretical track include, but are not limited to: 
  theoretical analysis of geometric algorithms and data structures;
  discrete and combinatorial geometry;
  mathematical and numerical issues arising from implementations.
Electronic submissions are preferred, but authors may instead
mail 8 copies of an extended abstract to arrive by December 4, 1998 to:

  Marshall Bern
  Xerox PARC 
  3333 Coyote Hill Road
  Palo Alto, CA  94304-1314
  Phone:  (650) 812-4443
  bern@parc.xerox.com


Important Dates

  December 4, 1998: Extended abstract due, both tracks
  February 13, 1999: Video submissions due
  February 15, 1999: Notification of acceptance or rejection of papers
  March 1, 1999: Notification of acceptance or rejection of videos 
  March 15, 1999: Camera-ready papers due
  April 15, 1999: Final versions of videos due
  June 13-16, 1999: Symposium


Papers that primarily address practical issues  
and implementation experience, even if not tied to
a particular application domain, should be submitted to
the applied track.  Papers that primarily prove theorems 
should be submitted to the theoretical track.
Most experimental work should be submitted to the 
applied track; an exception would be experiments
in support of mathematical investigations.
Submissions to one track may be forwarded
to the other for consideration, unless the authors have explicitly
stated interest in one track only.

An extended abstract sent to a program committee
should begin with a succinct statement of the problems and goals of
the paper, the main results, and the significance of the work in the
context of previous research. The abstract should provide sufficient detail to
allow the program committee to evaluate the validity, quality, and
relevance of the contribution. The entire extended abstract should not
exceed 10 pages at a reasonable font size.
An optional appendix may be included, but this
will be used at the program committee's discretion.

Abstracts in hard copy must be received by December 4, 1998, or
postmarked by November 27 and sent airmail.  Electronic submissions are
also due December 4.  These are firm deadlines: late submissions will
not be considered.  Authors will be notified of acceptance or rejection
by February 15, 1999.  A full version of each  contribution in final
form will be due by March 15, 1999 for inclusion in the proceedings.


          Conference Chair: Victor Milenkovic (U Miami)
                      vjm@cs.miami.edu

Applied Track Program Committee:

  Pankaj Agarwal (Duke)
  Nina Amenta (U Texas)
  Amy Briggs (Middlebury College)
  John Canny, Chair (Berkeley)
  David Dobkin (Princeton)
  Dan Halperin (Tel Aviv)
  Yan-Bin Jia (Carnegie-Mellon)
  Lydia Kavraki (Rice)
  Jean-Claude Latombe (Stanford)
  Dinesh Pai (U British Columbia)
  Jonathan Shewchuk (Berkeley)
  Jack Snoeyink (U British Columbia)
  Frank van der Stappen (Utrecht)

Theoretical track Program Committee:

  Marshall Bern, Chair (Xerox PARC)
  Herve Bronnimann (INRIA Sophia-Antipolis)
  Timothy Chan (U Miami)
  David Eppstein (UC-Irvine)
  Bernd Gaertner (ETH Zuerich)
  Jacob E. Goodman (City College, CUNY)
  Anna Lubiw (U Waterloo)

 

                       CALL FOR VIDEOS

      8th Annual Video Review of Computational Geometry

Background: This video review showcases the use of visualization in
computational geometry for exposition and education, as an interface
and a debugging tool in software development, and for the visual
exploration of geometry in research. Algorithm animations, visual
explanations of structural theorems, descriptions of applications of
computational geometry, and demonstrations of software systems are all
appropriate. Videos that accompany papers or communications submitted
to the technical program committee are encouraged.
 
Submissions: Authors should send one preview copy of a videotape to the
address below by February 13, 1999. The videotape should be at most eight
minutes long (three to five minutes, preferred), and be in VHS NTSC
or VHS PAL format.

Each video tape must be accompanied by
a one- or two-page description of the material
shown in the video, and where applicable, the techniques used
in the implementation.
Please format
descriptions following the guidelines for ACM proceedings.
Additional material describing the contents of the videos, such as the full
text of accompanying papers, may also be included.

Textual material may be submitted electronically by e-mailing either
the URL of a PostScript file (preferred) or the PostScript file
itself to jeffe@cs.uiuc.edu.
If electronic submission is impossible, authors should include
5 hardcopies of the accompanying text with their video.
 
Videotapes and accompanying text should be sent to:

  Jeff Erickson
  Department of Computer Science
  University of Illinois
  1304 W. Springfield Ave.
  Urbana, IL   61801
  Phone:  (217) 333-6769

For customs purposes, it is best to declare a value of $5. If you have
questions, please contact the committee chair at 
jeffe@cs.uiuc.edu or (217) 333-6769.

Notification: Authors will be notified of acceptance or rejection, and
given reviewers' comments by March 1, 1999. For each accepted
video, the final version of the textual description will be due by
March 15, 1999 for inclusion in the proceedings. Final versions of
accepted videos will be due April 15, 1999 in the best format
available. The accepted videos will be edited onto one tape, which
will be shown at the conference, distributed to the participants, and
available from ACM after the conference.

Video Program Committee:

  Danny Chen (Notre Dame)
  Jeff Erickson, Chair (U Illinois)
  John Sullivan (U Illinois)
  Subhash Suri (Washington U)
  Shang-Hua Teng (U Illinois)


-------------
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From compgeom-owner@research.bell-labs.com  Fri Oct  9 17:13:22 1998
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From: Marshall Bern <bern@parc.xerox.com>
To: compgeom-announce@research.bell-labs.com
Subject: Call for Papers -- ACM Symp. Comp. Geometry (LaTeX version)
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\documentclass{article}
\usepackage{multicol}

\pagestyle{empty}

\textwidth=6.5in
\textheight=9in
\oddsidemargin=0in
\evensidemargin=0in
\topmargin -.5in

\begin{document}
\vskip 1.5cm
\begin{center}
{\large \bf CALL FOR PAPERS} \\[4mm]
{\Large \bf Fifteenth Annual ACM Symposium on} \\[2mm]
{\Large \bf COMPUTATIONAL GEOMETRY} \\[7mm]
{\large \bf June 13--16, 1999}\\
{\large \bf Miami Beach, Florida}\\
{\large \tt http://www.cs.miami.edu/events/SCG99/}\\[4mm]
{\large Sponsored by ACM SIGACT \& SIGGRAPH}
\end{center}
 
 
\noindent
The 1999 ACM Symposium on Computational Geometry, featuring
an applied track, a theoretical track, and a video review,
will be held at the Radisson Deauville Resort in Miami Beach, Florida.
We invite submissions that address
\begin{itemize}
\setlength{\parskip}{0pt}
\setlength{\parsep}{0pt}
\setlength{\itemsep}{0pt}
	\item applications of geometric computing, for the applied track, or
	\item fundamental problems of geometric computing,
	  for the theoretical track.
\end{itemize}
During the conference, sessions of presentations will alternate between
the two tracks, rather than being in parallel.  The proceedings,
with the papers of both tracks, will be distributed at the symposium
and will subsequently be available for purchase from ACM.  A selection
of papers will be invited to special issues of journals.
%\smallskip \noindent
The conference will accept electronic submissions of postscript files;
guidelines will be available via the conference homepage, given above.

\noindent
\setlength{\columnseprule}{0.5pt}
\begin{multicols}{2}
\raggedcolumns


Topics for the applied track include, but are not limited to: %
{\em
 experimental analysis of algorithms and data structures;
 robotics and virtual worlds;
 computer graphics, simulation and visualization;
 image processing;
 geometric and solid modeling;
 computer aided geometric design;
 manufacturing;
 geographical information systems.
}

Electronic submissions are preferred for the applied
track, but authors may instead mail 14
copies of an extended abstract to arrive by
{\bf December 4, 1998} to:
\begin{center}
 John Canny \\*
 Computer Science Division \\*
 529 Soda Hall \\*
 Berkeley, CA 94720-1776\\*
 Phone:  (510) 642-9955 \\*
 {\tt jfc@cs.berkeley.edu}\\*
\end{center}

Topics for the theoretical track include, but are not limited to: %
{\em
	 theoretical analysis of geometric algorithms and data structures;
	 discrete and combinatorial geometry;
	 mathematical and numerical issues arising from implementations.
}


Electronic submissions are preferred for the 
theoretical track, but authors may instead mail 8
copies of an extended abstract to arrive by {\bf December 4, 1998} to:
\begin{center}
 Marshall Bern\\
 Xerox PARC \\
 3333 Coyote Hill Road\\
 Palo Alto, CA  94304-1314\\
 Phone:  (650) 812-4443\\
 {\tt bern@parc.xerox.com}
\end{center}
\end{multicols} 

\vfill
\medskip\noindent
{\sc Important Dates}\\
{\bf December 4, 1998:}
	Extended abstract due, both tracks\\
{\bf February 13, 1999:}
	Video submissions due\\
{\bf February 15, 1999:}
	Notification of acceptance or rejection of papers \\
{\bf March 1, 1999:}
	Notification of acceptance or rejection of videos \\
{\bf March 15, 1999:}
	Camera-ready papers due\\
{\bf April 15, 1999:}
	Final versions of videos due\\
{\bf June 13--16, 1999:}
	Symposium
\newpage% in 10pt

\medskip\noindent
Papers that primarily address practical issues  
and implementation experience, even if not tied to
a particular application domain, should be submitted to
the applied track.  Papers that primarily prove theorems 
should be submitted to the theoretical track.
Most experimental work should be submitted to the 
applied track; an exception would be experiments
in support of mathematical investigations.
Submissions to one track may be forwarded
to the other for consideration, unless the authors have explicitly
stated interest in one track only.

An extended abstract sent to a program committee
should begin with a succinct statement of the problems and goals of
the paper, the main results, and the significance of the work in the
context of previous research. The abstract should provide sufficient detail to
allow the program committee to evaluate the validity, quality, and
relevance of the contribution. The entire extended abstract should not
exceed 10 pages at a reasonable font size.
An optional appendix may be included, but this
will be used at the program committee's discretion.

Abstracts in hard copy must be received by December 4, 1998, or
postmarked by November 27 and sent airmail.  Electronic submissions are
also due December 4.  These are firm deadlines: late submissions will
not be considered.  Authors will be notified of acceptance or rejection
by February 15, 1999.  A full version of each  contribution in final
form will be due by March 15, 1999 for inclusion in the proceedings.
\\[1mm]


%\newpage % for 11point
%
\begin{tabbing}
\noindent{\bf Conference Chair:} \=Victor Milenkovic (U Miami)\+\\
{\tt vjm@cs.miami.edu}\\[2mm]
\end{tabbing}
%
{\bf Program Committees:}
\setlength{\columnseprule}{0pt}
\begin{multicols}{2}
\raggedcolumns
\noindent
{\bf Applied track:}\\[2mm]
{%\small
Pankaj Agarwal (Duke)\\*
Nina Amenta (U Texas)\\*
Amy Briggs (Middlebury College)\\*
John Canny, Chair (Berkeley)\\*
David Dobkin (Princeton)\\*
Dan Halperin (Tel Aviv)\\*
Yan-Bin Jia (Carnegie-Mellon)\\*
Lydia Kavraki (Rice)\\*
Jean-Claude Latombe (Stanford)\\*
Dinesh Pai (U British Columbia)\\*
Jonathan Shewchuk (Berkeley)\\*
Jack Snoeyink (U British Columbia)\\*
Frank van der Stappen (Utrecht)\\
}

\noindent
{\bf Theoretical track:}\\[2mm]
{%\small
Marshall Bern, Chair (Xerox PARC)\\
Herv\'e Br\"onnimann (INRIA Sophia-Antipolis)\\
Timothy Chan (U Miami)\\
David Eppstein (UC-Irvine)\\
Bernd G\"artner (ETH Z\"urich)\\
Jacob E. Goodman (City College, CUNY)\\
Anna Lubiw (U Waterloo)\\
}
\setcounter{unbalance}{2}
\end{multicols}

\newpage%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
\begin{center}{\bf 
                               CALL FOR VIDEOS\\
\vskip 8pt
{\sc             8th Annual Video Review of Computational Geometry}\\
\vskip 8pt
                           to be presented at the\\
\vskip 8pt
                     Fifteenth Annual ACM Symposium on
                           Computational Geometry\\
                             June 13--16, 1999\\
                           Miami Beach, Florida
}
\end{center}

\vskip 9pt
\noindent
Videos are sought for a video review of computational geometry.
 
\smallskip\noindent
{\bf Background:} This video review showcases the use of visualization in
computational geometry for exposition and education, as an interface
and a debugging tool in software development, and for the visual
exploration of geometry in research. Algorithm animations, visual
explanations of structural theorems, descriptions of applications of
computational geometry, and demonstrations of software systems are all
appropriate. Videos that accompany papers or communications submitted
to the technical program committee are encouraged.
 
\smallskip\noindent
{\bf Submissions:} Authors should send one preview copy of a videotape to the
address below by {\bf February 13, 1999}. The videotape should be at most eight
minutes long (three to five minutes, preferred), and be in VHS NTSC
or VHS PAL format.

Each video tape must be accompanied by
a one- or two-page description of the material
shown in the video, and where applicable, the techniques used
in the implementation.
Please format
descriptions following the guidelines for ACM proceedings.
Additional material describing the contents of the videos, such as the full
text of accompanying papers, may also be included.

Textual material may be submitted electronically by e-mailing either
the URL of a PostScript file (preferred) or the PostScript file
itself to {\tt jeffe@cs.uiuc.edu}.
If electronic submission is impossible, authors should include
5 hardcopies of the accompanying text with their video.
 
\smallskip\noindent
Videotapes and accompanying text should be sent to:
\begin{center}
	Jeff Erickson\\
        Department of Computer Science\\
        University of Illinois\\
        1304 W. Springfield Ave.\\
        Urbana, IL   61801\\
        Phone:  (217) 333-6769
\end{center}
\smallskip\noindent
For customs purposes, it is best to declare a value of \$5. If you have
questions, please contact the committee chair at 
{\tt jeffe@cs.uiuc.edu} or (217) 333-6769.

\smallskip\noindent
{\bf Notification:}
Authors will be notified of acceptance or rejection, and
given reviewers' comments by March 1, 1999. For each accepted
video, the final version of the textual description will be due by
March 15, 1999 for inclusion in the proceedings. Final versions of
accepted videos will be due April 15, 1999 in the best format
available. The accepted videos will be edited onto one tape, which
will be shown at the conference, distributed to the participants, and
available from ACM after the conference.
 
\medskip\noindent

\begin{multicols}{2}[{\noindent {\bf Video Program Committee:}}]
\raggedcolumns
\noindent Danny Chen (Notre Dame)\\
Jeff Erickson, Chair (U Illinois)\\
John Sullivan (U Illinois)\\
Subhash Suri (Washington U)\\
Shang-Hua Teng (U Illinois)\\
%\setcounter{unbalance}{2}
\end{multicols}
 
\end{document}


-------------
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or send mail to compgeom-request@research.bell-labs.com with the line:
send readme

From compgeom-owner@research.bell-labs.com  Fri Oct  9 17:16:02 1998
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From: Steve Owen <Steve.Owen@ansys.com>
To: compgeom-announce@research.bell-labs.com
Subject: Symposium on Trends in Unstructured Mesh Generation
Date: Thu, 8 Oct 1998 15:24:51 -0400
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===========================================================   
   Fifth US National Congress on Computational Mechanics
       2nd Symposium on Unstructured Mesh Generation
              University of Colorado, Boulder
                      August 4-6, 1999
===========================================================

Abstracts and papers are invited dealing with all aspects of
unstructured mesh generation, including, but not limited to: all-hex or
hex-dominant meshing, mesh sweeping, tet meshing, tri or quad surface
meshing, mesh strategies for shape optimization, mesh control schemes,
adaptive meshing algorithms, a priori mesh quality improvement, geometry
decomposition, repair and/or simplification techniques for CAD geometry,
parallel implementations, p-element (coarse) meshing, mesh smoothing,
and large mesh manipulation and storage.

Additional information on the symposium can be found at:
http://www.andrew.cmu.edu/user/sowen/usccm99/
Information on the Fifth US National Congress on Computational Mechanics
can be found at:
http://bechtel.colorado.edu/usccm99/

Abstracts are required for the conference and will be included in the
conference proceedings.  For format information, see:
http://bechtel.colorado.edu/usccm99/Abstracts.d/Instructions.html

Submit a one page electronic version of your abstract by JANUARY 5, 1999
to Dr. Scott A. Canann, scott.canann@ansys.com. Feel free to call (724)
514-2981, if you have any questions.  You can also ftp them to anonymous
ftp: ftp.ansys.com (login: anonymous  password: email address Place the
file in /pub/mesh) and send an email to Dr. Scott Canann to let know him
that it is there.

For inclusion in this symposia, full length papers (in addition to the
one page abstract) are requested, but not required.  A collection of the
final papers are planned to be combined into a special edition of the
International Journal for Numerical Methods in Engineering (IJNME).
Papers should all be submitted using the formatting and submission
guidelines given in that journal. Instructions for authors and
information about IJNME may be found at:
http://www.interscience.wiley.com/jpages/0029-5981/
All papers must be submitted to Dr. Cannan by email or anonymous ftp by
MARCH 29, 1999.

EMAIL OR FTP SUBMISSION OF A POSTSCRIPT FILE IS REQUIRED FOR BOTH THE
ABSTRACT AND THE PAPER.

Symposium Co-Chairs
Scott A. Canann, 
   Ansys, Inc. 
   scott.canann@ansys.com
Sunil Saigal, 
   Carnegie Mellon University 
   saigal+@andrew.cmu.edu
Steven J. Owen, 
   Ansys, Inc.
   steve.owen@ansys.com 


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From: "Vaclav Skala" <skala@kiv.zcu.cz>
To: <compgeom-announce@research.bell-labs.com>
Subject: REMINDER WSCG99 Deadline 15.10.98 Int.Conf.in Plzen, Close Prague, Czech Republic
Date: Sat, 10 Oct 1998 08:30:26 +0100
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Dear friends,

please, find enclosed information on 7-th WSCG Int.Conf. in Plzen close t=
o
Prague Czech Republic

Fundamental algorithms                 Rendering and visualization
Virtual reality
Parallel and distributed graphics     Viewing dynamic worlds
Surface meshing
Geometric modelling                     Animation
Computer aided geometric design
Morphing and warping                     Computational geometry          =
WWW
technologies
Medical imaging                             Graphical interaction and
standards                         Multimedia
Object-oriented graphics                 Image processing&computer vision
Fractals
CAD/CAM, DTP and GIS systems

Deadline  October 15, 1998
Venue:     February 8-12, 1999, Plzen, Czech Republic
More info http://wscg.zcu.cz  select WSCG99

Vaclav Skala

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Prof. Ing.Vaclav Skala,CSc.
University of West Bohemia,
Univerzitni 8, Box 314
306 14 Plzen-Bory
Czech Republic
Tel.: +420-19-7491-188, Fax: +420-19-7491-213
Secretary: Tel.: +420-19-7491-212
skala@kiv.zcu.cz,      http://iason.zcu.cz/~skala
>> for WSCG conferences: http://wscg.zcu.cz <<

Affiliated with:

Multimedia Technology Research Centre,  University of Bath
BATH BA2 7AY,  UNITED KINGDOM
-------------------------------------------------------------------------=
---
--------------------

-----Original Message-----
From: Marshall Bern <bern@parc.xerox.com>
To: compgeom-announce@research.bell-labs.com
<compgeom-announce@research.bell-labs.com>
Date: p=E1tek, =F8=EDjen 09, 1998 4:13
Subject: Call for Papers - ACM Symp. on Computational Geometry


>
>                  CALL FOR PAPERS
>
>           Fifteenth Annual ACM Symposium on
>                 COMPUTATIONAL GEOMETRY
>
>                   June 13--16, 1999
>                 Miami Beach, Florida
>
>          http://www.cs.miami.edu/events/SCG99/
>
>            Sponsored by ACM SIGACT & SIGGRAPH
>
>
>The 1999 ACM Symposium on Computational Geometry, featuring
>an applied track, a theoretical track, and a video review,
>will be held at the Radisson Deauville Resort in Miami Beach, Florida.
>We invite submissions that address
>  applications of geometric computing, for the applied track, or
>  fundamental problems of geometric computing, for the theoretical track.
>During the conference, sessions of presentations will alternate between
>the two tracks, rather than being in parallel.  The proceedings,
>with the papers of both tracks, will be distributed at the symposium
>and will subsequently be available for purchase from ACM.  A selection
>of papers will be invited to special issues of journals.
>The conference will accept electronic submissions of postscript files;
>guidelines will be available via the conference homepage, given above.
>
>
>Topics for the applied track include, but are not limited to
>  experimental analysis of algorithms and data structures;
>  robotics and virtual worlds;
>  computer graphics, simulation and visualization;
>  image processing;
>  geometric and solid modeling;
>  computer aided geometric design;
>  manufacturing;
>  geographical information systems.
>Electronic submissions are preferred, but authors may instead
>mail 14 copies of an extended abstract to arrive by December 4, 1998 to:
>
>  John Canny
>  Computer Science Division
>  529 Soda Hall
>  Berkeley, CA 94720-1776
>  Phone:  (510) 642-9955
>  jfc@cs.berkeley.edu
>
>Topics for the theoretical track include, but are not limited to:
>  theoretical analysis of geometric algorithms and data structures;
>  discrete and combinatorial geometry;
>  mathematical and numerical issues arising from implementations.
>Electronic submissions are preferred, but authors may instead
>mail 8 copies of an extended abstract to arrive by December 4, 1998 to:
>
>  Marshall Bern
>  Xerox PARC
>  3333 Coyote Hill Road
>  Palo Alto, CA  94304-1314
>  Phone:  (650) 812-4443
>  bern@parc.xerox.com
>
>
>Important Dates
>
>  December 4, 1998: Extended abstract due, both tracks
>  February 13, 1999: Video submissions due
>  February 15, 1999: Notification of acceptance or rejection of papers
>  March 1, 1999: Notification of acceptance or rejection of videos
>  March 15, 1999: Camera-ready papers due
>  April 15, 1999: Final versions of videos due
>  June 13-16, 1999: Symposium
>
>
>Papers that primarily address practical issues
>and implementation experience, even if not tied to
>a particular application domain, should be submitted to
>the applied track.  Papers that primarily prove theorems
>should be submitted to the theoretical track.
>Most experimental work should be submitted to the
>applied track; an exception would be experiments
>in support of mathematical investigations.
>Submissions to one track may be forwarded
>to the other for consideration, unless the authors have explicitly
>stated interest in one track only.
>
>An extended abstract sent to a program committee
>should begin with a succinct statement of the problems and goals of
>the paper, the main results, and the significance of the work in the
>context of previous research. The abstract should provide sufficient det=
ail
to
>allow the program committee to evaluate the validity, quality, and
>relevance of the contribution. The entire extended abstract should not
>exceed 10 pages at a reasonable font size.
>An optional appendix may be included, but this
>will be used at the program committee's discretion.
>
>Abstracts in hard copy must be received by December 4, 1998, or
>postmarked by November 27 and sent airmail.  Electronic submissions are
>also due December 4.  These are firm deadlines: late submissions will
>not be considered.  Authors will be notified of acceptance or rejection
>by February 15, 1999.  A full version of each  contribution in final
>form will be due by March 15, 1999 for inclusion in the proceedings.
>
>
>          Conference Chair: Victor Milenkovic (U Miami)
>                      vjm@cs.miami.edu
>
>Applied Track Program Committee:
>
>  Pankaj Agarwal (Duke)
>  Nina Amenta (U Texas)
>  Amy Briggs (Middlebury College)
>  John Canny, Chair (Berkeley)
>  David Dobkin (Princeton)
>  Dan Halperin (Tel Aviv)
>  Yan-Bin Jia (Carnegie-Mellon)
>  Lydia Kavraki (Rice)
>  Jean-Claude Latombe (Stanford)
>  Dinesh Pai (U British Columbia)
>  Jonathan Shewchuk (Berkeley)
>  Jack Snoeyink (U British Columbia)
>  Frank van der Stappen (Utrecht)
>
>Theoretical track Program Committee:
>
>  Marshall Bern, Chair (Xerox PARC)
>  Herve Bronnimann (INRIA Sophia-Antipolis)
>  Timothy Chan (U Miami)
>  David Eppstein (UC-Irvine)
>  Bernd Gaertner (ETH Zuerich)
>  Jacob E. Goodman (City College, CUNY)
>  Anna Lubiw (U Waterloo)
>
>
>
>                       CALL FOR VIDEOS
>
>      8th Annual Video Review of Computational Geometry
>
>Background: This video review showcases the use of visualization in
>computational geometry for exposition and education, as an interface
>and a debugging tool in software development, and for the visual
>exploration of geometry in research. Algorithm animations, visual
>explanations of structural theorems, descriptions of applications of
>computational geometry, and demonstrations of software systems are all
>appropriate. Videos that accompany papers or communications submitted
>to the technical program committee are encouraged.
>
>Submissions: Authors should send one preview copy of a videotape to the
>address below by February 13, 1999. The videotape should be at most eigh=
t
>minutes long (three to five minutes, preferred), and be in VHS NTSC
>or VHS PAL format.
>
>Each video tape must be accompanied by
>a one- or two-page description of the material
>shown in the video, and where applicable, the techniques used
>in the implementation.
>Please format
>descriptions following the guidelines for ACM proceedings.
>Additional material describing the contents of the videos, such as the f=
ull
>text of accompanying papers, may also be included.
>
>Textual material may be submitted electronically by e-mailing either
>the URL of a PostScript file (preferred) or the PostScript file
>itself to jeffe@cs.uiuc.edu.
>If electronic submission is impossible, authors should include
>5 hardcopies of the accompanying text with their video.
>
>Videotapes and accompanying text should be sent to:
>
>  Jeff Erickson
>  Department of Computer Science
>  University of Illinois
>  1304 W. Springfield Ave.
>  Urbana, IL   61801
>  Phone:  (217) 333-6769
>
>For customs purposes, it is best to declare a value of $5. If you have
>questions, please contact the committee chair at
>jeffe@cs.uiuc.edu or (217) 333-6769.
>
>Notification: Authors will be notified of acceptance or rejection, and
>given reviewers' comments by March 1, 1999. For each accepted
>video, the final version of the textual description will be due by
>March 15, 1999 for inclusion in the proceedings. Final versions of
>accepted videos will be due April 15, 1999 in the best format
>available. The accepted videos will be edited onto one tape, which
>will be shown at the conference, distributed to the participants, and
>available from ACM after the conference.
>
>Video Program Committee:
>
>  Danny Chen (Notre Dame)
>  Jeff Erickson, Chair (U Illinois)
>  John Sullivan (U Illinois)
>  Subhash Suri (Washington U)
>  Shang-Hua Teng (U Illinois)
>
>
>-------------
>The compgeom mailing lists: see
>http://netlib.bell-labs.com/netlib/compgeom/readme.html
>or send mail to compgeom-request@research.bell-labs.com with the line:
>send readme
>

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You have the very last opportunity to present your paper=20
                 before the year 2000
-----------------------------------------------------------

	                   W S C G'99=20

    The 7-th International Conference in Central Europe=20
         on Computer Graphics, Visualization and
                Digital Interactive Media 99=20

                    in cooperation with=20

         EUROGRAPHICS and IFIP working group 5.10
         on Computer Graphics and Virtual Worlds

          will be held in February 8 - 12, 1999=20
        in Plzen at the University of West Bohemia
       close to PRAGUE, the capital of the Czech Republic=20

-----------------------------------------------------------------------
>> If you are willing to help us as a REVIEWER, please,              <<
>> fill in the form at the http://wscg.zcu.cz/reviewer.htm           <<=20
-----------------------------------------------------------------------
>>Spare WSCG'98 proceedings are still available - ask your librarian <<
>>to order one - form is available from  http://wscg.zcu.cz & WSCG99 <<
-----------------------------------------------------------------------

                         Conference Chairs
                         =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
     Nadia Magnenat Thalmann, MIRALab-CUI, Univ. of Geneva, Switzerland
           Vaclav Skala, Univ. of West Bohemia, Czech Republic

                 International Programme Committee
                 =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
Bergougnoux,P.(F)    Chalmers,A.(UK)      Chen,J.(USA)      =
Fellner,D.(D)=20
Ferko,A.(SK)         Groeller,E.(A)       Hubbold,R.(UK)    Iones,A.(RU) =

Jensen,W.H.(D)       Klein,R.(D)          Mockrzycki,V.(PL) =
Peroche,B.(F)=20
Pratt,M.(USA)        Rossignac,J.(USA)    Sbert, M.(ES)     =
Seidel,H.-P.(D)=20
Sillion,F.(F)        Slavik,P.(CR)        Slusalek,P.(D)    Sochor, =
J.(CR)   =20
Strasser,W.(D)       Stuerzlinger,W.(USA) Szirmay-Kalos,L.(H) =
Tokuta,A.(USA)=20
Willis, P.(UK)       Wuetrich,C.(D)       Yagel, R.(USA)    Yukita,S.(J)
Zara, J.(CR)=20
=20
 =20
                Sponsors and supporting organizations
                =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
              Digital Equipment, Hewlett Packard, IBM,=20
        Silicon Graphics, Intergraph, Bentley Systems, Microsoft


                     Information for authors
                     =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Deadline for contributions: 	October 15, 1998=20
				original(full affiliation)
				+3 copies(non-affiliated)=20
				+electronic form in CORRECT Postscript=20
                                  to be compressed to gz format
				format A4 (strictly NOT B4, properly formated),=20
				8 pages including figures, tables etc.=20

Posters: same format, length restricted to 2 pages including pictures, =
tables etc.
         If presented by an author will be printed in separate volume.

For details, please, see http://wscg.zcu.cz select WSCG'99


                        Topics included
                        ---------------
Fundamental algorithms, rendering and visualization, virtual reality,=20
animation and multimedia, medical imaging, geometric modelling and =
fractals,=20
graphical interaction, object-oriented graphics, WWW technologies, =
standards,=20
computer vision, parallel and distributed graphics, computational =
geometry,=20
computer aided geometric design, CAD/CAM, DTP and GIS systems,=20
educational aspects of related fields, usage of graphics within =
mathematical=20
software (Maple, Mathematica, MathCAD etc.) in education

The program includes international books exhibition and video show, too.
                     ---------------------------------------------

                      W S C G '99 International Exhibition
                      ------------------------------------

Information for exhibitors: Please contact the organiser as soon as =
possible
--------------------------  for detailed information and conditions.

The WSCG98 Exhibition will be held in parallel. Top leading European and =
Czech=20
companies active in computer graphics, visualization and computer =
vision,=20
CAD/CAM  and GIS systems, virtual reality, multimedia systems and others =

will be presenting their latest products.

Special programme will be available, too.
-----------------

Accepted papers will be published in the Conference proceedings with =
ISBN.=20
They are reviewed by INSPEC, Cambridge Scientific Abstracts, InfoStore,=20
IEEE , ISI , AIMS , INIST and others for citations index and other =
purposes.=20
=20
The best papers will be considered for possible publication in the =
Journal of=20
Visualisation and Computer Animation, Computers&Graphics, The Visual =
Computer,=20
Machine Graphics & Vision and others journals.=20

=09

             	Organizer and conference secretariat
             	------------------------------------
                            Vaclav Skala
                c/o Computer Science Dept., Univ.of West Bohemia
             Univerzitni 8, Box 314, 306 14 Plzen, Czech Republic

	e-mail: skala@kiv.zcu.cz	Subject: INFO WSCG99
	tel.:+420-19-7491-188		fax:+420-19-7491-188
					fax:+420-19-7822-578


The latest information is available at:=20

		http://wscg.zcu.cz	select WSCG'99

Information on all WSCG conferences:    http://wscg.zcu.cz=09

In case of any problems:                http://147.228.63.9




------=_NextPart_000_0044_01BDF428.3B8234A0--


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From compgeom-owner@research.bell-labs.com  Thu Oct 15 18:06:24 1998
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Date: Mon, 12 Oct 1998 22:14:57 -0400 (EDT)
From: "Joseph O'Rourke" <orourke@grendel.csc.smith.edu>
To: compgeom-announce@research.bell-labs.com
Subject: Book Announcement: Computational Geometry in C (2nd Ed.)
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COMPUTATIONAL GEOMETRY IN C (SECOND EDITION)
Joseph O'Rourke
Cambridge University Press.

Printed 28 September 1998; shipping as of 2 October 1998.
Hardback:  ISBN 0521640105, $69.95 (55.00 PST)
Paperback: ISBN 0521649765, $29.95 (19.95 PST)

Some highlights:
1. 376+xiii pages, 270 exercises, 210 figures, 259 references.
2. Although I've retained the title "...in C," all code
   has been translated to Java, and both C and Java code is available 
   via links from http://cs.smith.edu/~orourke.
3. A Java Applet permits interactive use of the code.  See previous URL.
4. First Edition code improved:  Postscript output, more efficient,
   more robust.
5. New code (see below).
6. Expanded coverage of randomized algorithms, ray-triangle intersection,
   and other topics (see below).

Basic statistics:
1.  approx. 50 pages longer
2.  31 new figures.
3.  49 new exercises.
4.  74 new references
5.   4 new programs.

New code:
1.  To compute the Delaunay triangulation from the 3D hull in O(n^2).
2.  To intersect a ray with a triangle.
3.  To decide if a point is inside a polyhedron. 
4.  To compute the convolution (Minkowski sum) of a convex polygon with
    a general polygon.
5.  To generate regularly distributed points on the surface of a
    sphere.

Significant code improvements:
1.  Triangulation code now O(n^2) rather than n^3.  
    Uses lists rather than arrays.
2.  Graham scan handles collinear points more cleanly.
3.  Convex hull in 3D starts with double-covered triangle.
    Volume determinant computations much faster.  Overflow handled better.
4.  Segment-segment intersection code handles special cases cleanly.
5.  Point-in-polygon code classifies all boundary points correctly.
6.  Intersection of convex polygons handles special cases more uniformly.
7.  Robot arm configuration more robust.

New coverage of these topics:
1.  Partition into monotone mountains (for triangulation).
2.  Randomized trapezoid decomoposition.
3.  Randomized triangulation.
4.  The ultimate convex hull algorithm.
5.  Randomized 3D hull construction.
6.  Twin edge data structure.
7.  Furthest-point Voronoi diagram figure.
8.  Red-blue matching.
9.  Intersection of segment and triangle.
10. Point-in-polyhedron.
11. The Bentley-Ottmann algorithm for intersecting segments.
12. Boolean operations between two polygons.
13. Segment search tree.
14. Sources and further reading: annotated bibliography.


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From: wads@turing.scs.carleton.ca (Workshop on Algorithms and Data Structures)
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                               CALL FOR PAPERS

          1999 Workshop on Algorithms And Data Structures (WADS'99)

           August 12-14, 1999 Vancouver, Britich Columbia, Canada

                     http://www.scs.carleton.ca/~wads/

                                Sponsored by
             The Pacific Institute for the Mathematical Sciences

The Workshop, which alternates with the Scandinavian Workshop on Algorithm
Theory, is intended as a forum for researchers in the area of design and
analysis of algorithms and data structures. We invite submissions of papers
presenting original research on the theory and application of algorithms and
data structures in all areas, including combinatorics, computational
geometry, databases, graphics, parallel and distributed computing.

Contributors are invited to submit a full paper (not exceeding 12 pages) by
e-mail to "wads@scs.carleton.ca". Detailed submission instructions are
located at http://www.scs.carleton.ca/~dehne/proj/wads/99/instr.html.
Submissions must arrive on or before March 1, 1999. Authors will be notified
of acceptance or rejection by April 30, 1999. Proceedings will be published
in the Springer Verlag series Lecture Notes in Computer Science. The final
versions of accepted papers must arrive in camera-ready form before May 21,
1999 to ensure the availability of the proceedings at the conference.
Selected papers will be invited for publication in a special issue of
Computational Geometry: Theory and Applications.

Invited Speakers (tentative): Charles Leiserson, Marc Snir, Nadia Magnenat
Thalman, Umesh Vazirani, and Jeff Vitter

Conference Co-Chairs: B. Bhattacharya and A. Gupta, Computer Science, Simon
Fraser University, wads_local@cs.sfu.ca, http://www.cs.sfu.ca/~wads

Program Committee:
Co-Chairs: F. Dehne (Carleton), A. Gupta (SFU), J.-R. Sack (Carleton) and R.
Tamassia (Brown).
PC-Members (tentative): A. Andersson (Lund), A. Apostolico (Purdue and
Padova), G. Ausiello (Rome), K. Clarkson (Lucent), R. Cleve (Calgary), M.
Cosnard (Lille), L. Devroye (McGill), M. Goodrich (Johns Hopkins) A. Grama
(Purdue), M. Keil (Saskatchewan), D. Kirkpatrick (UBC), R. Krishnamurti
(SFU), D.T. Lee (Northwestern), F. Luccio (Pisa), A. Maheshwari (Carleton),
G. Plaxton (Univ. of Texas at Austin), J. Reif (Duke), F. Ruskey (U. Vic),
P.G. Spirakis (Patras), L. Stewart (Alberta), H. Sudborough (U. Texas
Dallas), P. Vitanyi (CWI), P. Widmayer (ETH), C.K. Wong (Chinese U. Hong
Kong)



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From compgeom-owner@research.bell-labs.com  Tue Nov  3 22:14:53 1998
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Date: Tue, 3 Nov 1998 17:32:51 +0100 (MET)
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From: Peter Sanders <sanders@mpi-sb.mpg.de>
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                   P O S T - D O C T O R A L

                      F E L L O W S H I P S

                             at the


              M A X - P L A N C K - I N S T I T U T E

                              for

                   C O M P U T E R   S C I E N C E




The Max-Planck-Institute for Computer Science is located on the
campus of the Universit"at des Saarlandes in Saarbr"ucken, Germany.
The institute was founded in 1990 and consists, at present, of
two research units: Algorithms and Complexity, and Logic of
Programming. Two new units: Hybrid Systems, and Computer Graphics
will be added in the first half of 1999.

The research group ALGORITHMS AND COMPLEXITY offers a number of
postdoctoral fellowships for the year 1999/2000. Fellowships are
available for one or two years and amount to DM 3,400 per month,
taxfree (approximately USD 2000). There is generous travel support
available and the group collaborates with several of the major
research institutions in Europe and USA.

The interests of the research group members includes data structures,
graph and network algorithms, computational geometry, parallel
algorithms, computational complexity, combinatorial optimization,
graph drawing, on-line algorithms, randomized algorithms,
computational biology and implementation of algorithms and program
libraries. The group consists mainly of young researchers of several
nationalities. The postdoctoral fellows are expected to interact with
group members and are encouraged to initiate research in their
individual areas of specialization. More information is available on
WWW at http://www.mpi-sb.mpg.de

Applications (including curriculum vitae, list of publications,
research plan, names of references with their e-mail addresses, and
intended period of stay) should be sent by FEBRUARY 28, 1998 to Kurt
Mehlhorn or Peter Sanders.

Further information can be also obtained from Peter Sanders
(sanders@mpi-sb.mpg.de).

Max-Planck-Institut f"ur Informatik
Im Stadtwald
D-66123 Saarbr"ucken
Germany


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From compgeom-owner@research.bell-labs.com  Wed Nov  4 23:36:39 1998
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Organization: MIT Computer Graphics Group
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Position Summary: The MIT Computer Graphics Group, affiliated
with the MIT Laboratory for Computer Science, seeks a self=
motivated GRAPHICS SYSTEM MANAGER to support and contribute
to a wide variety of research efforts, including the develop-
ment of cutting-edge prototype software and instrumentation.

Responsibilities: The position involves managing a mix of PC 
and SGI servers and workstations, and an interesting collec-
tion of high-end input devices, instrumentation, and software
packages. The candidate should have some familiarity with 
graphics platforms and practice, traditional and/or digital 
photography, and video equipment. The candidate should be 
capable of independent pursuit of complex system administra-
tion tasks, and contribute to ongoing research and engineer-
ing projects. The position will involve considerable interac-
tion with faculty, students, and other technical support staff
at MIT.

Requirements: BS in computer science or related field. Ability
to work with others on technically oriented projects. Experience
with networks of PC and SGI machines, and fast distributed file
systems. Good written, oral, and people skills.

To apply, send a resume and letter describing relevant experience
to:

  Mr. James McCarthy
  Massachusetts Institute of Technology
  77 Massachusetts Avenue E19-238
  Cambridge, MA 02139
  
Resumes may also be sent electronically (as plain text) to

  jimhmc@mit.edu

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From compgeom-owner@research.bell-labs.com  Tue Nov 10 18:05:28 1998
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Call for Papers

Special Issue of the Journal
Computational Geometry: Theory and Applications
on Multi-Resolution 3D Modeling, Encoding and Transmitting

Submission due: December 15, l998

     There has been recently considerable interest in building and
managing multi-resolution 3D models, especially triangular/polygonal
and tetrahedral meshes (e.g. through Levels of Detail or LODs), as
well as in efficiently encoding 3D models for transmission and compact
storage. One particularly promising application is progressive
delivery of 3D geometry across a network (e.g. the Internet) or to a
display terminal.  Many of the fundamental issues involved in this
process center around Computational Geometry and Topology.

     This special issue is dedicated to applications of
Computational Geometry to generate, compress, encode and efficiently
use multi-resolution representations of 3-D (or 2-D) geometry, for
progressive, and parameter dependent visualization (and more
generally, utilization).

Topics include, but are not limited to:

* Progressive transmission and/or display and view-dependent
refinement of 3-D geometry

* Automated generation of levels of detail of 3D models

* Wavelet-based multi-resolution representation of 3-D geometry

* Compression of 3-D geometry

* Representations and algorithms for handling topological changes
and/or non-manifold topology

* Multi-resolution methods and algorithms exploiting levels of detail
in Geographic Information Systems (GIS)

* Methods For handling very large data sets, and low memory footprint
methods

* Frameworks for progressively delivering 3-D geometry on the
World Wide Web

Schedule:

          Paper submission: December 15, l998
          Acceptance/rejection notification: April 1st, l999
          Final manuscript submission: May 15, l999
          Publication: Fall/Winter 1999 or earlier

The guest editors for this issue are:


Dr. Andre Gueziec
Dr. Gabriel Taubin
IBM T.J.Watson Research Center
30 Sawmill River Road
Hawthorne, NY 10532

email: {gueziec, taubin}@watson.ibm.com

SUBMISSION INSTRUCTIONS:

All submission will be refereed in accordance with the Journal guidelines.
Manuscripts will not be accepted if they have been previously published.

Please submit 5 copies of your article to either guest editor at the
address above. Please attempt to limit the length of the article to 35
pages.

JOURAL GUIDELINES:

Please refer to the following Web page:

http://www.elsevier.nl/locate/compgeo

Electronic submissions of Latex documents are possible once the
paper has been accepted.






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From compgeom-owner@research.bell-labs.com  Fri Nov 13 19:52:40 1998
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Date: Fri, 13 Nov 1998 08:03:01 -0800
From: "Charles Jones" <charles.jones@edwards.af.mil>
To: compgeom-announce@research.bell-labs.com
Subject: Dynamic Spectrum Allocation
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Dynamic Spectrum Allocation

I am looking for someone to research appropriate algorithms for
dynamically allocating telemetry spectrum.  This appears to be similar to
other dynamic bin packing problems.  There is a limited amount of
bandwidth for which multiple aircraft are vying.  Further, the bandwidth
required for each aircraft may change at unknown intervals.  A central
controller must inform each aircraft what frequency (and spectrum width)
each aircraft may use.  The time duration for each allocation may or may
not be known.  The problem is therefore 2 dimensional in that there are
both spectrum and time dimensions.  Although there are certainly no
guarantees, there is some potential for a grant to research this topic.=20

Further queries may be made to:

Charles H. Jones
Edwards AFB, CA, USA
charles.jones@edwards.af.mil=20
805-275-4492



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Subject: CFP-- ACM Symp. Computational Geometry
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                  CALL FOR PAPERS

           Fifteenth Annual ACM Symposium on
                 COMPUTATIONAL GEOMETRY
 
                   June 13--16, 1999
                 Miami Beach, Florida

          http://www.cs.miami.edu/events/SCG99/

            Sponsored by ACM SIGACT & SIGGRAPH
 
 
The 1999 ACM Symposium on Computational Geometry, featuring
an applied track, a theoretical track, and a video review,
will be held at the Radisson Deauville Resort in Miami Beach, Florida.
We invite submissions that address
  applications of geometric computing, for the applied track, or
  fundamental problems of geometric computing, for the theoretical track.
During the conference, sessions of presentations will alternate between
the two tracks, rather than being in parallel.  The proceedings,
with the papers of both tracks, will be distributed at the symposium
and will subsequently be available for purchase from ACM.  A selection
of papers will be invited to special issues of journals.
The conference will accept electronic submissions of postscript files;
guidelines will be available via the conference homepage, given above.


Topics for the applied track include, but are not limited to
  experimental analysis of algorithms and data structures;
  robotics and virtual worlds;
  computer graphics, simulation and visualization;
  image processing;
  geometric and solid modeling;
  computer aided geometric design;
  manufacturing;
  geographical information systems.
Electronic submissions are preferred, but authors may instead
mail 14 copies of an extended abstract to arrive by December 4, 1998 to:

  John Canny 
  Computer Science Division 
  529 Soda Hall 
  Berkeley, CA 94720-1776
  Phone:  (510) 642-9955 
  jfc@cs.berkeley.edu

Topics for the theoretical track include, but are not limited to: 
  theoretical analysis of geometric algorithms and data structures;
  discrete and combinatorial geometry;
  mathematical and numerical issues arising from implementations.
Electronic submissions are preferred, but authors may instead
mail 8 copies of an extended abstract to arrive by December 4, 1998 to:

  Marshall Bern
  Xerox PARC 
  3333 Coyote Hill Road
  Palo Alto, CA  94304-1314
  Phone:  (650) 812-4443
  bern@parc.xerox.com


Important Dates

  December 4, 1998: Extended abstract due, both tracks
  February 13, 1999: Video submissions due
  February 15, 1999: Notification of acceptance or rejection of papers
  March 1, 1999: Notification of acceptance or rejection of videos 
  March 15, 1999: Camera-ready papers due
  April 15, 1999: Final versions of videos due
  June 13-16, 1999: Symposium


Papers that primarily address practical issues  
and implementation experience, even if not tied to
a particular application domain, should be submitted to
the applied track.  Papers that primarily prove theorems 
should be submitted to the theoretical track.
Most experimental work should be submitted to the 
applied track; an exception would be experiments
in support of mathematical investigations.
Submissions to one track may be forwarded
to the other for consideration, unless the authors have explicitly
stated interest in one track only.

An extended abstract sent to a program committee
should begin with a succinct statement of the problems and goals of
the paper, the main results, and the significance of the work in the
context of previous research. The abstract should provide sufficient detail to
allow the program committee to evaluate the validity, quality, and
relevance of the contribution. The entire extended abstract should not
exceed 10 pages at a reasonable font size.
An optional appendix may be included, but this
will be used at the program committee's discretion.

Abstracts in hard copy must be received by December 4, 1998, or
postmarked by November 27 and sent airmail.  Electronic submissions are
also due December 4.  These are firm deadlines: late submissions will
not be considered.  Authors will be notified of acceptance or rejection
by February 15, 1999.  A full version of each  contribution in final
form will be due by March 15, 1999 for inclusion in the proceedings.


          Conference Chair: Victor Milenkovic (U Miami)
                      vjm@cs.miami.edu

Applied Track Program Committee:

  Pankaj Agarwal (Duke)
  Nina Amenta (U Texas)
  Amy Briggs (Middlebury College)
  John Canny, Chair (Berkeley)
  David Dobkin (Princeton)
  Dan Halperin (Tel Aviv)
  Yan-Bin Jia (Carnegie-Mellon)
  Lydia Kavraki (Rice)
  Jean-Claude Latombe (Stanford)
  Dinesh Pai (U British Columbia)
  Jonathan Shewchuk (Berkeley)
  Jack Snoeyink (U British Columbia)
  Frank van der Stappen (Utrecht)

Theoretical track Program Committee:

  Marshall Bern, Chair (Xerox PARC)
  Herve Bronnimann (INRIA Sophia-Antipolis)
  Timothy Chan (U Miami)
  David Eppstein (UC-Irvine)
  Bernd Gaertner (ETH Zuerich)
  Jacob E. Goodman (City College, CUNY)
  Anna Lubiw (U Waterloo)

 

                       CALL FOR VIDEOS

      8th Annual Video Review of Computational Geometry

Background: This video review showcases the use of visualization in
computational geometry for exposition and education, as an interface
and a debugging tool in software development, and for the visual
exploration of geometry in research. Algorithm animations, visual
explanations of structural theorems, descriptions of applications of
computational geometry, and demonstrations of software systems are all
appropriate. Videos that accompany papers or communications submitted
to the technical program committee are encouraged.
 
Submissions: Authors should send one preview copy of a videotape to the
address below by February 13, 1999. The videotape should be at most eight
minutes long (three to five minutes, preferred), and be in VHS NTSC
or VHS PAL format.

Each video tape must be accompanied by
a one- or two-page description of the material
shown in the video, and where applicable, the techniques used
in the implementation.
Please format
descriptions following the guidelines for ACM proceedings.
Additional material describing the contents of the videos, such as the full
text of accompanying papers, may also be included.

Textual material may be submitted electronically by e-mailing either
the URL of a PostScript file (preferred) or the PostScript file
itself to jeffe@cs.uiuc.edu.
If electronic submission is impossible, authors should include
5 hardcopies of the accompanying text with their video.
 
Videotapes and accompanying text should be sent to:

  Jeff Erickson
  Department of Computer Science
  University of Illinois
  1304 W. Springfield Ave.
  Urbana, IL   61801
  Phone:  (217) 333-6769

For customs purposes, it is best to declare a value of $5. If you have
questions, please contact the committee chair at 
jeffe@cs.uiuc.edu or (217) 333-6769.

Notification: Authors will be notified of acceptance or rejection, and
given reviewers' comments by March 1, 1999. For each accepted
video, the final version of the textual description will be due by
March 15, 1999 for inclusion in the proceedings. Final versions of
accepted videos will be due April 15, 1999 in the best format
available. The accepted videos will be edited onto one tape, which
will be shown at the conference, distributed to the participants, and
available from ACM after the conference.

Video Program Committee:

  Danny Chen (Notre Dame)
  Jeff Erickson, Chair (U Illinois)
  John Sullivan (U Illinois)
  Subhash Suri (Washington U)
  Shang-Hua Teng (U Illinois)


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From: Emo Welzl <emo@inf.ethz.ch>
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To: compgeom-announce@research.bell-labs.com
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The Institute for

	Theoretical Computer Science, ETH Zurich, Switzerland

offers several 

	Ph.D. positions

with obligations in teaching support. Selected research topics
which should be understood in the spectrum from theoretical
to experimental and application-oriented investigations: 
Cryptography, combinatorial algorithms and data structures,
discrete and computational geometry, optimization, algorithmic
number theory. Advisors: J. Bloemer, R. Cramer, B. Gaertner, 
U. Maurer, J. Nievergelt, J. Richter-Gebert, T. Roos, 
P. Widmayer und E. Welzl. Applications with a short letter
of reference and some ideas about the Ph.D. topic should be
directed to   

Emo Welzl
Theoretische Informatik, ETH Zentrum
CH-8092 Zurich, Switzerland, (e-mail: emo@inf.ethz.ch)

as soon as possible.
_____________________________________
http://www.inf.ethz.ch/department/TI/

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Date: Thu, 19 Nov 1998 17:49:45 +0100
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Dies ist eine mehrteilige Nachricht im MIME-Format.
--------------6793F8CCC7592C98617DEEB1
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--------------6793F8CCC7592C98617DEEB1
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\documentstyle[12pt]{article}
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\textwidth=17.5cm \textheight=26cm

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\itemsep=0.1pt
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\begin{document}
\begin{center}
{\Large\bf --- First Call for Papers ---\\[10pt]}
{\Large\bf COCOON '99}\\
{\bf
  Fifth Annual International Computing and Combinatorics Conference
}\\
{\bf             July 26--28, 1999, Tokyo, Japan
}\\
{\small Supported by Chuo University,
in cooporation with SIGAL IPSJ and COMP IEICE}
\end{center}

The Fifth Annual International Computing and Combinatorics Conference
will be held in Tokyo, Japan,
July 26--28, 1999.
The conference is intended to provide a forum for researchers in
theoretical computer science.
Papers presenting original research in the
areas of algorithms, theory of computation,
computational complexity, and combinatorics related to computing
are sought. In addition to theoretical results,
we are interested in submissions which report on experimental
and applied research. Typical, but not exclusive, topics of interest include:

\begin{tabbing}
\hskip5mm\=\+$\bullet$
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
AAA\=\kill
- algorithms and data structures \>
- automata, languages and logic \\
- complexity and computability \>
- computational biology and chemistry \\
- computational geometry and algebra \>
- cryptography and computational number theory \\
- learning theory and knowledge discovery \>
- optimization and network theory \\
- parallel and distributed computing \>
- graph drawing and information visualization \\
- combinatorics related to algorithms and complexity


\end{tabbing}
%
Authors should send a PostScript file of an extended abstract
(in English) by {\bf February 8, 1999}.
A submission guideline including e-submission address
will be given in our homepage
{\bf http://www.ecei.tohoku.ac.jp/COCOON99/}.
Alternatively, authors can send 24 hard copies.
An abstract should start with the title of the paper, each author's name,
affiliation and e-mail address, and a short summary of the main results.
The extended abstract should provide sufficient detail
to allow the Program Committee to evaluate
its validity, quality, and relevance to the symposium.
The length of the extended abstract should not exceed 10 pages
(using 11 point or larger font, with ample margins all around).
Authors will be notified of acceptance or rejection by March 30, 1999.
A camera-ready copy of each accepted paper is required by April 26, 1999.
The proceedings of the conference will be published by Springer-Verlag
in the Lecture Notes in Computer Science series, and will be available
for distribution at the conference. Selected papers will
be also published in special issues in journals.
The Hao Wang award will be given to the best paper
(details will be given in our homepage).

\small

\vskip3mm\noindent
{\bf Invited Speakers:} \ \
Prabhakar Raghavan (IBM Almaden) and Seinosuke Toda (Nihon University)

\vskip3mm\noindent
{\bf Program Committee:} \ \
%
Jean-Daniel Boissonnat (INRIA, France),
Zhi-Zhong Chen (Tokyo Denki U., Japan),
Xiaotie Deng (HKCU, Hong Kong),
David Eppstein (UC Irvine, USA),
Uriel Feige (Weitzmann, Israel),
Harold Gabow (Colorado, USA),
Ronald Graham (AT\&T Bell, USA),
Frank Hwang (Chiao Tung U., Taiwan),
Tao Jiang (McMaster, Canada),
Howard Karloff (Georgia Tech., USA),
Samir Khuller (Maryland, USA),
Rao Kosaraju (Johns Hopkins, USA),
D. T. Lee (Co-Chair, Academia Sinica, Taiwan),
Xuemin Lin (NSW, Australia),
Bruce Maggs (CMU, USA),
Kurt Mehlhorn (MPI Saarbr\"{u}cken, Germany),
Satoru Miyano (U. Tokyo, Japan),
Seffi Naor (Technion, Israel),
G\"unter Rote (Graz, Austria),
Madhu Sudan (MIT, USA),
Roberto Tamassia (Brown, USA),
Takeshi Tokuyama (Co-Chair, IBM, Japan),
Jeff Vitter (INRIA, France and Duke, USA),
Guoliang Xue (Vermont, USA)

\noindent
{\bf Conference Committee:} \ \
Takao Asano (Co-Chair, Chuo University),
Hiroshi Imai (Co-Chair, University of Tokyo) and
Shin-ichi Nakano (Publicity, Tohoku University)

\vskip3mm\noindent
{\bf Important dates:}  \\
Submission deadline : February 8, 1999. \ \
Notification: March 30, 1999. \ \
Conference: July 26--28, 1999. \\
{\bf Hard-copy submission address:}
Takeshi Tokuyama, IBM Tokyo Research Laboratory, \\
1623-14, Shimo Tsuruma, Yamato, 242-0001, Kanagawa, Japan.
(email: ttoku@trl.ibm.co.jp)
\end{document}
--------------6793F8CCC7592C98617DEEB1--


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From compgeom-owner@research.bell-labs.com  Mon Nov 30 16:59:38 1998
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Date: Mon, 30 Nov 1998 15:32:08 +0100
From: Laurent Moccozet <Laurent.Moccozet@cui.unige.ch>
Subject: [CFP] Computational Geometry journal - Special Issue
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Call for Papers

Special Issue of the Computational Geometry Journal
on Computational Geometry in Virtual Reality

Submission due: February 15th, 99

Computational Geometry provides a wide range of efficient and original
solutions to problems faced by researchers in Virtual Reality. 

This special issue is dedicated all applications of Computational Geometry
to build, control, animate and display Virtual Worlds. Original,
research, practice, and experience papers are sought that address 
Computational Geometry aspects and applications in Virtual Reality.
Topics include, but are not limited to:

* 3D Geometric Shape Modeling.
* 3D Shape Morphing and Warping.
* Rendering Virtual Worlds.
* Visualization of Virtual Worlds.
* Realistic Textures Simulation 
	and Texture Mapping.
* Virtual Landscape Modeling.
* Natural Phenomenons Simulation.
* Articulated Characters Animation.
* Motion Control and Capture.
* Collision Detection in Virtual Worlds.
* Path and Route Planning in Virtual Worlds.
* Level of Details Management in Virtual Worlds.
* 3D Shape Simplification for Virtual Worlds.

Schedule:

		Paper submission: February 15, l999
		Acceptance/rejection notification: May 1, l999
		Final manuscript submission: June 15, l999
		Publication: late l999/early 2000

The guest editors of this issue are:

Prof. Nadia Magnenat-Thalmann,
thalmann@cui.unige.ch

and 

Dr. Laurent Moccozet
moccozet@cui.unige.ch

MIRALab, University of Geneva,
24 Rue du General Dufour
CH 1211 Geneva 4, Switzerland,

Submission guidelines:

Authors should carefuly check the guide for authors available from 
              http://www.elsevier.nl/locate/comgeo

           - Paper manuscript submission:

           Send five copies of the full manuscript to:

             Laurent Moccozet
             MIRALab, University of Geneva,
             24 Rue du General Dufour
             CH 1211 Geneva 4, Switzerland
	       FAX: +41 22 705 77 80
             phone: +41 22 705 76 19

           - Electronic submission:

           Authors may submit their paper by ftp. The electronic version of
           your manuscript should be submitted in PDF (preferred) or
Postscript
           using anonymous ftp to cuisg34.unige.ch. The paper should be
submitted
           as one file. The file name should be first  author's name.
Please follow 
           the procedure: 

             ftp cuisg34.unige.ch 
             username: anonymous 
             password: <your email address> 
             cd cgta 
             put <filename> 
  
In any case, you should send an email to the editors with the title of the
paper, the authors with affiliation, the contact author, the abstract and
eventually the filename used for ftp.

----------
Laurent Moccozet		 	Laurent.Moccozet@cui.unige.ch
MIRALab/CUI, Universite de Geneve 	tel:+41 22 705 76 66
24 Rue du General Dufour		fax:+41 22 705 77 80
CH 12111 Geneve 4			http://www.miralab.unige.ch/~moccozet/

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We would like to remind you that on-campus accomodation at the
DIMACS-HKUST Far-East Workshop on Algorithms and Combinatorics
have to be reserved in the next few days, preferably before 
December 4th.

Please consult our workshop webpage at
    http://www.cs.ust.hk/tcsc/dimacs.html
for details on registering and reserving accomodation.

For your convenience, the workshop announcement is reproduced below.

Our apologies to those who receive this message more than once.

Best wishes,
    The organizing committee at HKUST
    (dimacswac@cs.ust.hk)

-----------------------------------------------------------	

                 DIMACS-HKUST Far-East Workshop on 
                     Algorithms and Combinatorics
                http://www.cs.ust.hk/tcsc/dimacs.html

As part of their recent cooperation agreement, DIMACS and the 
Theoretical Computer Science Center at the Hong Kong University of
Science and Technology  are co-sponsoring a workshop from December 
18-20, 1998 at HKUST. The goal of this workshop is to foster greater
communication and collaboration between DIMACS and algorithm researchers 
in Asia. Its focus will be on algorithms, combinatorics and the interplay 
between them. 

Two types of talks are planned; extended surveys by seven distinguished 
invited speakers and shorter presentations by the attendees describing 
their current research. In addition, there will be open problem sessions. 

The workshop is deliberately planned in such a way that participants 
can combine it with ISAAC'98 in Korea. 


List of Invited Speakers

       Ding-Zhu Du, University of Minnesota 
       Wen-Lian Hsu, Academia Sinica 
       Frank Hwang, Chiao-Tung University 
       Ricky Pollack, New York University (Courant Institute) 
       Robert Sedgewick, Princeton University 
       Micha Sharir, University of Tel Aviv 
       Neil Sloane, AT&T Labs 


CONTRIBUTED PAPER SUBMISSIONS:  A one-page abstract should be submitted, if 
at all possible in electronic form using Postscript. Authors are responsible 
to make sure that their submission can be printed. Please send your
submission, with author's names and affiliations, to dimacswac@cs.ust.hk.
If you are unable to submit electronically please send email to 
dimacswac@cs.ust.hk for further instructions.

REGISTRATION:  There is a nominal registration fee of HK$250 (about US$30) 
to cover the costs of the communal coffee breaks. To register, please print 
out the registration form (Postscript format) available at the
conference web site   
                   http://www.cs.ust.hk/tcsc/dimacs.html
and mail or fax the completed form to Ms. Vanessa Kwok at the address 
given on the form. 

ACCOMMODATION: HKUST is able to provide accommodation in serviced apartments 
on the HKUST campus, a few minutes walking from the workshop venue. Each 
apartment consists of three rooms that share a small living room, toilet 
and bathroom, and a small kitchen area. The cost is HK$400 (about US$50) 
per room per night. The cost of accommodation will be charged to your credit 
card together with the registration fee. The number of apartments is
limited, and requests will be honored on a first-come-first-serve basis. 

You can request such a room on campus on the registration form. The apartments
are available from December 17 to December 23, in case you wish to spend 
extra days in Hong Kong. 

CANCELLATIONS: Please note that for cancellations after December 1, 1998, 
we will not be able to reimburse the registration fee and the room rate 
for the first night. 

CONTACT: If there are any other questions, please contact the organization 
committee at dimacswac@cs.ust.hk. 



ORGANIZING COMMITTEE
       Siu-Wing Cheng, Hong Kong UST 
       Otfried Cheong, Hong Kong UST 
       XiaoTie Deng, City University of Hong Kong 
       Mordecai Golin, Hong Kong UST 
       Ron Graham, AT&T Labs and Rutgers 
       Fred Roberts, Rutgers 





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Date: Thu, 3 Dec 1998 17:21:28 +0900
From: "ISAAC '98" <isaac98@jupiter.kaist.ac.kr>
To: compgeom-announce@research.bell-labs.com
Subject: [ISAAC98] Final Call for Participation
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============================================================================
			FINAL CALL-FOR-PARTICIPATION
			----------------------------
                    Ninth Annual International Symposium
                        on Algorithms and Computation
============================================================================

                            December 14-16, 1998
                        Riviera Hotel, Taejon, Korea

                                Hosted by
         KAIST(Korea Advanced Institute of Science and Technology) 
                  KISS(Korea Information Science Society)

                              Sponsored by
                Ministry of Information and Communication
                Korea Science and Engineering Foundation
                 Information Processing Society of Japan
             Korea Information Society Development Institute


This symposium is intended to provide a forum for researchers working in
algorithms and theory of computation. It will be held in Taejon which is 
famous with hot spring resort, and is surrounded by historical landmarks 
of the ancient(18 B.C-A.D.660) civilization and beautiful mountains - 
Kyeryoung, Daedoon and Pomun.

Co-host KISS has been the professional
organization in Korea for those in computer and information sciences since
1973. The symposium is hosted in celebration of KISS's 25th anniversary.

Organization
------------
  o Program Committee Chair

   * Kyung-Yong Chwa (Co-Chair; KAIST, Korea)
   * Oscar Ibarra (Co-Chair; UC Santa Barbara, USA)

  o Program Committee

   * Takao Asano (Chuo U., Japan)
   * Ding-Zhu Du (U. of Minnesota, USA)
   * Susanne Hambrusch (Purdue U., USA)
   * Hiroshi Imai (U. of Tokyo, Japan)
   * Tao Jiang (McMaster U., Canada)
   * Sam Kim (Kyungpook Nat. U., Korea)
   * D.T. Lee (Northwestern U., USA)
   * Ming Li (U. of Waterloo, Canada)
   * Pandu Rangan (IIT, Madras, India)
   * Sartaj Sahni (U. of Florida, USA)
   * P. Spirakis (Comp. Tech. Inst., Patras, Greece)
   * Roberto Tamassia (Brown U., USA)
   * Shanghua Teng (U. of Illinois, USA)
   * Osamu Watanabe (Tokyo Inst. Tech., Japan)
   * Peter Widmayer (ETH, Zurich, Switzerland)
   * Chee K. Yap (Courant Inst. NYU, USA)
   * Hsu-Chun Yen (National Taiwan U., Taiwan)

  o Organizing Committee Chair

   * Jik Hyun Chang (Sogang U., Korea)

  o Organizing Committee
   * Hee-Chul Kim (Hankuk U. of Foreign Studies, Korea)
   * Sang-Ho Lee (Ewha Womans U., Korea)
   * Kunsoo Park (Seoul National U., Korea)

Invited Speaker
---------------
      o Bernard Chazelle(Princeton University and Ecole Polytechnique)
             "The Discrepancy Method"
      o Roberto Tamassia(Brown University)
             "Implementing Algorithms and Data Structures:
              An Educational and Research Perspective"

 Program
----------  
 Sunday, December 13, 1998
 6:00  Early Registration and Welcome Reception

 Monday, December 14, 1998
 8:30  Registration
 9:20  Opening Address

 Invited Presentation
 9:30  The Discrepancy Method - Abstract
       Bernard Chazelle (Princeton and Ecole Polytechnique)
 Coffee Break: 10:30 -- 11:00

 Session 1A: Geometry I
 11:00 $L_\infty$ Voronoi Diagrams and Applications to VLSI Layout and
       Manufacturing
       Evanthia Papadopoulou
 11:30 Facility Location on Terrains
       Boris Aronov, Marc van Kreveld, René van Oostrum, Kasturirangan
       Varadarajan
 12:00 Computing Weighted Rectilinear Median and Center Set in the Presence
       of Obstacles
       Joonsoo Choi, Chan-Su Shin, Sung Kwon Kim

 Session 1B: Complexity I
 11:00 Maximizing Agreement with a Classification by Bounded or Unbounded
       Number of Associated Words
       Hiroki Arimura, Shinichi Shimozono
 11:30 Disjunctions of Horn Theories and Their Cores
       Thomas Eiter, Toshihide Ibaraki, Kazuhisa Makino
 12:00 Checking Programs Discreetly: Demonstrating Result-Correctness
       Efficiently While Concealing It
       Giovanni Di Crescenzo, Kouichi Sakurai, Moti Yung
 Lunch: 12:30 --- 2:00

 Session 2A: Graph Drawing
 2:00  Two-Layer Planarization in Graph Drawing
       Petra Mutzel, René Weiskircher
 2:30  Computing Orthogonal Drawings in a Variable Embedding Setting
       Walter Didimo, Giuseppe Liotta
 3:00  Dynamic Grid Embedding with Few Bends and Changes
       Ulrik Brandes, Dorothea Wagner

 Session 2B: On-Line Algorithm and Scheduling
 2:00  Two New Families of List Update Algorithms
       Frank Schulz
 2:30  An Optimal Algorithm for On-Line Palletizing at Delivery Industry
       J. Rethmann, E. Wanke
 3:00  On-Line Scheduling of Parallel Jobs with Runtime Restrictions
       Stefan Bischof, Ernst W. Mayr
 Coffee Break: 3:30 -- 4:00

 Session 3A: CAD/CAM and Graphics
 4:00  Testing the Quality of Manufactured Disks and Cylinders
       Prosenjit Bose, Pat Morin
 4:30  Casting with Skewed Ejection Direction
       Hee-Kap Ahn, Siu-Wing Cheng, Otfried Cheong
 5:00  Repairing Flaws in a Picture Based on a Geometric Representation of
       a Digital Image
       Tetsuo Asano, Hiro Ito, Souichi Kimura, Shigeaki Shimazu

 Session 3B: Graph Algorithm I
 4:00  k-Edge and 3-Vertex Connectivity Augmentation in an Arbitrary
       Multigraph
       Toshimasa Ishii, Hiroshi Nagamochi, Toshihide Ibaraki
 4:30  Polyhedral Structure of Submodular and Posi-modular Systems
       Hiroshi Nagamochi, Toshihide Ibaraki
 5:00  Maximizing the Number of Connections in Optical Tree Networks
       Thomas Erlebach, Klaus Jansen

 Tuesday, December 15, 1998

 Invited Presentation
 9:00  Implementing Algorithms and Data Structures: an Educational and
       Research Perspective - Abstract
       Roberto Tamassia (Brown)

 Session 4: Best Paper Presentation
 10:00 Selecting the k Largest Elements with Parity Tests
       Tak Wah Lam, Hing Fung Ting
 Coffee Break: 10:30 -- 11:00

 Session 5A: Randomized Algorithm
 11:00 Randomized K-Dimensional Binary Search Trees
       Amalia Duch, Vladimir Estivill-Castro, Conrado Martínez
 11:30 Randomized O(log log n)-Round Leader Election Protocols in Packet
       Radio Networks
       Koji Nakano, Stephan Olariu
 12:00 Random Regular Graphs with Edge Faults: Expansion through Cores
       Andreas Goerdt

 Session 5B: Complexity II
 11:00 A Quantum Polynomial Time Algorithm in Worst Case for Simon's
       Problem
       Takashi Mihara, Shao Chin Sung
 11:30 Generalized Graph Colorability and Compressibility of Boolean
       Formulae
       Richard Nock, Pascal Jappy, Jean Sallantin
 12:00 On the Complexity of Free Monoid Morphisms
       Klaus-Jörn Lange, Pierre McKenzie
 Lunch: 12:30 --- 2:00

 Session 6A: Graph Algorithm II
 2:00  Characterization of Efficiently Solvable Problems on
       Distance-Hereditary Graphs
       Sun-Yuan Hsieh, Chin-Wen Ho, Tsan-Sheng Hsu, Ming-Tat Ko, Gen-Huey
       Chen
 2:30  Fast Algorithms for Independent Domination and Efficient Domination
       in Trapezoid Graphs
       Yaw-Ling Lin
 3:00  Finding Planar Geometric Automorphisms in Planar Graphs
       Seok-Hee Hong, Peter Eades, Sang-Ho Lee

 Session 6B: Combinatorial Problem
 2:00  A New Approach for Speeding Up Enumeration Algorithms
       Takeaki Uno
 2:30  Hamiltonian Decomposition of Recursive Circulants
       Jung-Heum Park
 3:00  Convertibility among Grid Filling Curves
       Tetsuo Asano, Naoki Katoh, Hisao Tamaki, Takeshi Tokuyama
 Coffee Break: 3:30 -- 4:00

 Session 7A: Geometry II
 4:00  Generalized Self-Approaching Curves
       Oswin Aichholzer, Franz Aurenhammer, Christian Icking, Rolf Klein,
       Elmar Langetepe, Gunter Rote
 4:30  The Steiner Tree Problem in $\lambda_4$-geometry Plane
       Guo-Hui Lin, Guoliang Xue

 Session 7B: Computational Biology
 4:00  Approximation and Exact Algorithms for RNA Secondary Structure
       Prediction and Recognition of Stochastic Context-Free Languages
       Tatsuya Akutsu
 4:30  On the Multiple Gene Duplication Problem
       Michael Fellows, Michael Hallett, Ulrike Stege

 6:00     Conference Banquet

 Wednesday, December 16, 1998

 Session 8A: Geometry III
 9:00  Visibility Queries in Simple Polygons and Applications
       Boris Aronov, Leonidas J. Guibas, Marek Teichmann, Li Zhang
 9:30  Quadtree Decomposition, Steiner Triangulation, and Ray Shooting
       Siu-Wing Cheng, Kam-Hing Lee
 10:00 Optimality and Integer Programming Formulations of Triangulations in
       General Dimension
       Akira Tajima

 Session 8B: Approximation Algorithm
 9:00  Space-Efficient Approximation Algorithms for MAXCUT and COLORING
       Semidefinite Programs
       Philip N. Klein, Hsueh-I Lu
 9:30  A Capacitated Vehicle Routing Problem on a Tree
       Shin-ya Hamaguchi, Naoki Katoh
 10:00 Approximation Algorithms for Some Optimum Communication Spanning
       Tree Problems
       Bang Ye Wu, Kun-Mao Chao, Chuan Yi Tang
 Coffee Break: 10:30 -- 11:00

 Session 9A: Complexity III
 11:00 The Edge-Disjoint Paths Problem is NP-Complete for Partial k-Trees
       Xiao Zhou, Takao Nishizeki
 11:30 Inapproximability Results for Guarding Polygons without Holes
       Stephan Eidenbenz
 12:00 The Inapproximability of Non NP-hard Optimization Problems
       Liming Cai, David Juedes, Iyad Kanj

 Session 9B: Parallel and Distributed Algorithm
 11:00 An Efficient NC Algorithm for a Sparse $k$-Edge-Connectivity
       Certificate
       Hiroshi Nagamochi, Toru Hasunuma
 11:30 A Parallel Algorithm for Sampling Matchings from an Almost Uniform
       Distribution
       J. Diaz, J. Petit, P. Psycharis, M. Serna
 12:00 Optimal Approximate Agreement with Omission Faults
       Richard Plunkett, Alan Fekete


Proceedings
-----------
Accepted papers will be published in the proceedings of the
symposium(Lecture Notes in Computer Science, Volume 1533, Springer-Verlag).
Some selected papers will appear in Theoretical Computer Science as special issues.

Further Information
-------------------
If you have any question and request, do not hesitate to ask us. Fax number
is +82-42-869-3510 and e-mail address is isaac98@jupiter.kaist.ac.kr.
The detailed information for transportation(including time tables for buses 
and trains), conference site map, and tourist attractions can be found 
at our web site: http://jupiter.kaist.ac.kr/~isaac98/

General Information
-------------------
  * Weather
Weather in December is mostly cold with occasional snows. Temperature ranges
between -5 degrees Centigrade and -2.5 degrees Centigrade(23F - 27.5F).

  * Currency Exchange
US $1 is about 1270 won. But nowadays, the exchange rate is fluctuating very
much. You can get the current exchange rate from internet.
(http://www.koexbank.co.kr/exchange_rating/newexchange2.html)
Credit cards, including VISA and Master Cards are accepted at hotels, 
department stores and restaurants.


Accommodation
-------------
Two hotels have been chosen as standard lodging for the conference.
One is Riviera hotel(the conference venue), and the other is Top hotel
(within easy walking distance to Riviera Hotel).
All rooms in Top hotel have been already reserved by pre-registers.
Thus you can get a room only in Riviera hotel, 
but the room is still served by special conference rates.
If you want rooms in hotels other than Riviera, we can check it instead of you.
	

Registration
------------
    Please, complete the form(with the  payment) and send it to the
    following address(FAX or postal mail only):

      Fax:    +82-2-360-2306
      Address:Ms. Cho, Tae-Nam
              Dept. of Computer Science and Engineering
              College of Engineering, Ewha Womans University
              11-1 Daehyun-dong, Seodaemun-ku, Seoul, Korea 120-750
      (E-Mail:isaac98@mm.ewha.ac.kr)

------------------------------ cut here -----------------------------------

=======================================================================
             ISAAC'98 REGISTRATION/ACCOMMODATION FORM 
=======================================================================

                          Mail or fax to:
      Ms. Cho, Tae-Nam, Dept. of Computer Science and Engineering
           College of Engineering, Ewha Womans University,
        11-1 Daehyun-dong, Seodaemun-ku, Seoul, Korea 120-750
                       Fax: +82-2-360-2306


__ Male        __ Female
__ Dr.      __ Prof.     __ Researcher & Engineer    __ Student
__ Other (please specify)_________________

Family name:_________________ Given name:_________________

Affiliation:_________________________________________

Address:_____________________________________________

_____________________________________________________

_____________________________________________________

Phone:_________________  Fax:________________________

Email:_______________________________________________

Registration fee
================================================
   Regular          US $360 ___

   Student          US $240 ___
------------------------------------------------
Registration covers a copy of proceedings, reception on Dec. 13,
2 lunches, coffee and banquet on Dec. 15.  
The student fee does not include the banquet.

-----------------------------------------------------
Additional Tickets          Number        Amount
=====================================================
Banquet(US $50 each)        ______        ______
-----------------------------------------------------

-----------------------------------------------------------
Hotel Rates(Daily rates in US dollars per room (incl.tax).)
===========================================================
Category          Riviera (5 star)
===========================================================
Single(1)          95,000 won ___
Double(2)         105,000 won ___
Ondol(2)           95,000 won ___
-----------------------------------------------------------
(Ondol means a Korean traditional room which is heated by 
Korean under-floor heating system. There are no beds in 
the Ondol room. US $1 is about 1350 won. The exchange rate
is fluctuating very much.)

Arrival Date:_____________   Departure Date:_____________ 

I wish to share my room with:____________________________

(We will make a hotel reservation for you. To guarantee your 
reservation, a nonrefundable deposit(US $50) is required.  
The remaining hotel charge should be paid directly to the hotel.)


Grand Total
============
Registration fee + Room deposit + Banquet tickets 
                                    (optional)
= _______________


Payment
========
All payments should be made in US dollar through one of the
following means. Bank transfer is highly recommended.

* Bank transfer  
----------------
Name of the bank: Korea Exchange Bank Pangbaidong branch,
                  Seoul, Korea

Account number: 099-JSD-100740

Name of Account holder : KISS

Please enclose a copy of the bank transfer when sending the
registration form. 

* By credit card. Please complete
-----------------
  ___ VISA                   ___ MASTER

Card Number:_____________________________________________

Card Holder Name:________________________________________

Card Holder Address:_____________________________________

_________________________________________________________

Expires:_____________  Signature:________________________

Registration/reservation will be confirmed only after
payment has been received.

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Date: Mon, 7 Dec 1998 12:40:10 -0500 (EST)
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                         Call for papers
                            Euro-Par'99
                         Toulouse, France
                   August 31 - September 3, 1999
 
                            ===========
 
Topic 07: Theory and models for parallel Computation
---------
 
Topic Committee :
-----------------
 
         Global chair : Michel Cosnard (LORIA-INRIA, France)
         Vice-chair   : Sajal Das (University of North Texas, USA)
         Vice-chair   : Frank Dehne (Carleton University, Canada)
         Local chair  : Afonso Ferreira (CNRS - I3S - INRIA, 
                        Sophia-Antipolis, France)
 
Description :
-------------
 
This topic intends to discuss the current state of parallel computational 
and cost models, algorithms and complexity. An emphasis is on research 
that takes into account properties of real machines like communication 
cost and asynchrony. Famous examples are BSP, CGM, LogP, and PRAM. 
Developments, comparisons of, and algorithms for such models as well 
as studies of complexity issues are welcome.
Special consideration will be given to scalable, practical algorithms.
Algorithmic strategies for abstract parallel models are encouraged,
as well as algorithmic tuning for specific architectures, and experimental
analysis which provides insight into algorithmic choice.


Topics of interest include :
----------------------------
 
          cost models
          modelling architectures
          algorithms and data structures
          complexity theory
          applications and implementations
          experimental analysis


Euro-Par conference series :
----------------------------
 
Euro-Par is the annual European conference on parallel computing. It
is dedicated to the promotion and advancement of all aspects of parallel
computing.
 
Euro-Par'99 is  organized as a day  of tutorials, two half-day plenary
sessions, and a number of parallel sessions.
 
Paper submission :
------------------
 
Authors are requested to use the electronic form on the web site
to submit their paper to the topic they judge most appropriate.
 
Official  Address and Organization:
-----------------------------------
 
For any questions related to Euro-Par'99 please refer to our
web site:
             http://www.enseeiht.fr/europar99/
or e-mail to:
                   europar99@enseeiht.fr.
 
The key dates are:
------------------
 
         - January 31st 1999 : Final Date for Submissions
         - May 1st 1999      : Acceptances Notified
         - June 1st 1999     : Final Copy and Author Registration due
         - June 30th 1999    : Early Registration Deadline
         - August 1st 1999   : Late Registration Deadline
 
 


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Date: Tue, 08 Dec 1998 15:35:50 +0100
From: Marc van Kreveld <marc@cs.uu.nl>
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Call for Papers
             Special Issue of Algorithmica:

     -- Algorithms for Geographical Information --


Submission deadline: December 21, 1998
Expected publication: Early 2000
Guest editor: Marc van Kreveld

Algorithmica is planning a special issue on algorithms for
geographical information. Papers describing original research are
solicited that deal with algorithmic issues for handling geographic
information.  Survey and state-of-the-art papers will also be
considered;
in that case, please contact the guest editor as soon as possible with
the intended contents to avoid conflicts.

Topics of interest include, but are not limited to, algorithmic issues
in:

* map overlay
* map generalization
* label placement
* terrain models
* spatial interpolation
* geostatistics
* spatio-temporal data
* error handling and uncertainty
* feature extraction
* visualization, animation, and simulation
* network analysis
* mathematical modeling of geographic problems
* optimization, parallel, distributed, geometric, graph, and
  evolutionary algorithms applied to geographical data

Papers that extend well-known algorithms in nontrivial ways in order to
be relevant to geographic data handling are also solicited. Every paper
should explicitly address its relevance to geographical data handling.
Theoretical and/or experimental analysis is encouraged.

Manuscripts should be prepared according to the standard submission
guidelines of Algorithmica. All submissions will be subject to the
regular refereeing process of the journal. Submit five copies of a
full paper to the guest editor (address below) by December 21, 1998.

Marc van Kreveld
Dept. of Computer Science
Utrecht University
P.O.Box 80.089
3508 TB Utrecht
The Netherlands

E-mail: marc@cs.uu.nl

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Subject: CGTA: new editor in-chief; special issues
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It is our pleasure to inform you that Professor Kurt Mehlhorn,
Max-Planck Institut fuer Informatik, Saarbruecken, Germany
has accepted our invitation to join as co-editor in-chief
of the journal Computational Geometry: theory and applications. 
We anticipate that this  addition
will prove to be very positive for CGTA and its readership.

Please note that authors can submit to any of the three co-editors in-chief
(as well as directly to one of the editors). We would like to encourage
authors to submit papers electronically (in post-script ) 
to one of the following addresses:

horn@mpi-sb.mpg.de    [for K. Mehlhorn]
sack@scs.carleton.ca  [for J.-R. Sack]
jorge@site.uottawa.ca [for J. Urrutia]

This is just one of our efforts designed to reduce reviewing delays.

We would also like to draw your attention to the following
web-site relevant to the journal: http://www.elsevier.nl/locate/comgeo
with many  pointers e.g., to Instructions for authors.

********************************************************************* 
Special issues on new and exciting areas are planned; topics include:

Multi-Resolution 3D Modeling, Encoding and Transmitting

guest editors:
Dr. Andre Gueziec
Dr. Gabriel Taubin
IBM T.J.Watson Research Center
30 Sawmill River Road
Hawthorne, NY 10532
{gueziec, taubin}@watson.ibm.com
_
 
Computational Geometry in Virtual Reality

(guest) editors: 
 
Dr. Laurent Moccozet
moccozet@cui.unige.ch
   and
Prof. Nadia Magnenat-Thalmann,
MIRALab, University of Geneva,
24 Rue du General Dufour
CH 1211 Geneva 4, Switzerland,
email: thalmann@cui.unige.ch


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Date: Wed, 09 Dec 1998 12:21:52 +0100
From: Marc van Kreveld <marc@cs.uu.nl>
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Below is the CFP for a workshop. Please note that it overlaps
with the Symposium on Computational Geometry in Miami Beach,
June 1999.

Marc van Kreveld

-----------------------------------------------------------

International Workshop on

Integrated Spatial Databases: Digital Images and GIS

June 14 - 15, 1999

Portland, Maine, USA

--------------------------------------------------------

Announcement and Call for Papers

--------------------------------------------------------

This intensive workshop is sponsored by the Information and Data
Management Program of the Directorate for Computer and Information
Sciences of the National Science Foundation (NSF). Its scope is to
bring together specialists from a  variety of overlapping but not
always interacting scientific communities.


Original, quality contributions are solicited on issues related (but
not limited) to the following list of topics:

   * Spatial and Spatio-Temporal Databases
   * Database-Driven Information Extraction from Digital Imagery
   * Queries and Content-Based Information Retrieval Methods
   * Automated Extraction of GIS Objects from Digital Imagery
   * Change Detection and Representation
   * Uncertainty Estimation and Modelling in GIS
   * Spatio-Temporal Reasoning
   * Scale in GIS and Digital Image Processing
   * Very Large Spatial and Image Databases
   * Multimedia in Integrated GIS
   * Digital Libraries
   * Multiple Representations

This is a fully refereed workshop. The proceedings will be published by
Springer Verlag as a "Lecture Notes in Computer Science" volume.  To
ensure the constructive interaction between participants and the high
quality level of the workshop, the number of participants will be
limited. For more details on submission procedures, the conference
venue,
and registration information, please refer to the workshop web page at
http://www.spatial.maine.edu/~peggy/nsfWS.html.

------------------------------------------------------------------------

Workshop Chair: Peggy Agouris, University of Maine

Program Committee Chair: Anthony Stefanidis, University of Maine

Program Committee:

Kate Beard, University of Maine
Panos Chrysanthis, University of Pittsburgh
Max Egenhofer, University of Maine
Wolfgang Foerstner, University of Bonn, Germany
Andrew Frank, Technical University of Vienna, Austria
Dieter Fritsch, University of Stuttgart, Germany
Mike Goodchild, University of California - Santa Barbara
Armin Gruen, Swiss Federal Institute of Technology, Switzerland
Thanasis Hadzilacos, Computer Technology Institute, Greece
Marinos Kavouras, National Technical University of Athens, Greece
David Mark, State University of New York at Buffalo
Dave McKeown, Carnegie Mellon University
Martien Molenaar, International Institute for Aerospace Survey and
        Earth Sciences (ITC), The Netherlands
Dimitris Papadias, University of Science and Technology, Hong Kong,
China
Hanan Samet, University of Maryland - College Park
Tapani Sarjakoski, Finnish Geodetic Institute, Finland
Timos Sellis, National Technical University of Athens, Greece
Shashi Shekhar,  University of Minnesota
Nektaria Tryfona, Aalborg University, Denmark
Vassilis Tsotras, University of California - Riverside
Marc van Kreveld, Utrecht University, The Netherlands

-----------------------------------------------------------------------

Important Dates

Presentation Proposals (3-Page Extended Abstracts) Due: Feb. 1, 1999
Acceptance Notification: Feb. 22, 1999
Full Papers Due: May 21, 1999
Workshop Dates: June 14 - 15, 1999
Full Paper Acceptance Notification: June 25, 1999
Submission of Revised, Camera-Ready Papers Due: July 23, 1999

-----------------------------------------------------------------------

Contact Information

For further details or more up-to-date information please visit the
workshop WWW page at http://www.spatial.maine.edu/~peggy/nsfWS.html or
contact the organizers at:

ISD Workshop '99 Secretariat
Dept. of Spatial Information Engineering
University of Maine
348 Boardman Hall
Orono, ME 04469-5711, USA

Phone: +(207) 581 2180 or +(207) 581 2127
Fax: +(207) 581 2206

E-Mail: nsfWS99@spatial.maine.edu

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Date: Tue, 15 Dec 1998 18:35:59 +0100 (MET)
From: Herve Bronnimann <Herve.Bronnimann@sophia.inria.fr>
Message-Id: <199812151735.SAA03913@sargas.inria.fr>
To: compgeom-announce@research.bell-labs.com
Subject: CG'99 (15th European Workshop on Computational Geometry)
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#########################################################################=
###

                            CALL FOR PARTICIPATION

                          15TH EUROPEAN WORKSHOP ON
                           COMPUTATIONAL GEOMETRY

                             March 15-16-17 1999=20
                   Palais des Congres, Antibes Juan-Les-Pins
		=09
                      http://www.inria.fr/prisme/cg99/

            Sponsored by INRIA, Matra Datavision, Matra Marconi Space
#########################################################################=
####
                NEWS : YOU CAN REGISTER FROM THE WEB PAGES
                CREDIT CARDS NOT ACCEPTED, SO DO NOT WAIT
#########################################################################=
####


The European Workshop on Computational Geometry will be held on March
15-16-17 1999, at the Palais des Congr=E8s, Antibes Juan-Les-Pins, France.

The goal of the workshop is to bring together the researchers in
Computational Geometry, facilitating - through an informal scheme - the
diffusion of their most recent work.

-------------------------------------------------------------------------=
----

INVITED SPEAKERS:

    [*] Bernard Chazelle, Princeton University, and Ecole Polytechnique P=
aris.
    [*] Jeffrey S. Vitter, Duke University and INRIA Sophia-Antipolis.
    [*] Jean-Marie Laborde, IMAG Grenoble.


-------------------------------------------------------------------------=
----

PARTICIPATION:

All interested people are welcome, even if they do not intend to give a t=
alk.
Information about the workshop can be found on the CG'99 www home page.
To register on-line, please consult the CG'99 www home page.
To register by standard mail, send a copy of the registration form by mai=
l to
the address below. (You can obtain the registration form from the CG'99 w=
ww
home page or from the organizers.)

Deadline for registration : February 28th, 1999=20
Deadline for hotel registration : February 10th, 1999=20

-------------------------------------------------------------------------=
----

CONTRIBUTIONS:

Participants are encouraged to give a 20 minutes presentation of their wo=
rk.
A preliminary title and a brief abstract (1-3 pages) should be submitted =
(either
PS files by email to cg99@sophia.inria.fr or camera-ready papers by regul=
ar mail
to the address below) before January 15th, 1999.
The workshop language will be English.
If the number of presentations is too large, a selection will be made by =
the
organizers.
No proceeding will be published but the abstracts will be collected and
distributed among the participants at the Workshop.

Deadline for submissions : January 15th, 1999

-------------------------------------------------------------------------=
----

ORGANIZING COMMITTEE:

      Jean-Daniel Boissonnat=20
      Herve Bronnimann (chair)=20
      Frederic Cazals=20
      Frank Da
      Olivier Devillers=20
      Pierre-Marie Gandoin
      Sylvain Pion=20
      Francois Rebufat
      Monique Simonetti (secretary)
      Monique Teillaud=20
      Mariette Yvinec=20

-------------------------------------------------------------------------=
----

ADDRESS: CG'99

Monique Simonetti
15th European Workshop on Computational Geometry
INRIA Sophia-Antipolis, B.P. 93=20
2004 Route des Lucioles
06902 Sophia-Antipolis Cedex, FRANCE

E-mail: cg99@sophia.inria.fr
Phone:  +33 4.92.38.78.64
Fax:    +33 4.92.38.79.55

-------------------------------------------------------------------------=
----

IMPORTANT DATES

January 15th, 1999: Deadline for submissions=20
January 25th, 1999: Program available from this web page=20
February 10th, 1999: Deadline for hotel registration
February 28th, 1999: Deadline for registrations=20
March 15th, 1999: Beginning of the conference=20

#########################################################################=
####


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From compgeom-owner@research.bell-labs.com  Fri Dec 18 17:38:39 1998
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To: compgeom-announce@research.bell-labs.com, theory-local@umiacs.umd.edu
Subject: ALENEX '99 Reminder
Date: Wed, 16 Dec 1998 09:46:29 -0500
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This is a quick reminder that the registration deadline for 

   1999 Workshop on Algorithm Engineering and Experimentation (ALENEX '99)

is this weekend.  This workshop will be held in Baltimore, MD on
January 15 and 16 at the same location and immediately before SODA '99.

Please see the workshop web site for the registration form and other details:

	http://www.cs.jhu.edu/Conferences/ALENEX99/

Thanks,
Michael Goodrich, Johns Hopkins University
Cathy McGeoch, Amherst College

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From compgeom-owner@research.bell-labs.com  Thu Dec 24 19:24:34 1998
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From: culver@cs.unc.edu
To: compgeom-announce@research.bell-labs.com
CC: geom@cs.unc.edu, Sylvain.Pion@sophia.inria.fr
Subject: MAPC: an efficient library for algebraic points & curves, v. 1.0
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The Department of Computer Science at the University of North Carolina,
Chapel Hill announces the release of MAPC: a library for efficient and
exact manipulation of algebraic points and curves in the plane.  MAPC
is a collection of C++ classes which allow programmers to easily 
define and work with:

- Multivariate polynomials with floating-point, multiprecision integer,
  or multiprecision rational coefficients. 

- Algebraic numbers represented as the roots of polynomials within an
  interval. 

- One and two dimensional points whose coordinates are defined as either
  algebraic numbers or as rational numbers. 

- Segments of algebraic plane curves. 

For further information and downloading instructions, please see the 
MAPC web page:
	http://www.cs.unc.edu/~geom/MAPC/

Questions or comments can be directed to: geom@cs.unc.edu

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JeoEdit: Java Polygon & Point Editors
         created by Mark Grundland for Godfried Toussaint
         Computational Geometry Lab
         School of Computer Science at McGill University
         Montreal, Canada

The JeoEdit package, consisting of the JeoEditPoints applet and the
JeoEditPolygon applet, is a set of Java visual editors for computational
geometry. Their mission is to help the computational geometry community to
realize its algorithms and theorems on the internet, by providing a
flexible and easy interface for drawing a set of points or a polygon as
well as the means to communicate this geometric information to any applet.
These ready-to-use editors focus on user interaction while your applet can
concentrate on algorithmic calculation. The advantage of using the JeoEdit
editors is that, by providing a self-contained user interface for
manipulating geometric structures, they leave you free to create the applet
of your dreams without having to worry about how that interface works.

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###################################################################

                  15TH EUROPEAN WORKSHOP ON
                   COMPUTATIONAL GEOMETRY

                    March 15-16-17 1999 
          Palais des Congres, Antibes Juan-Les-Pins

              http://www.inria.fr/prisme/cg99/

     Sponsored by INRIA, Matra Datavision, Matra Marconi Space
###################################################################
     
   REMINDER: DEADLINE FOR SUBMISSIONS IS *** January 15, 1999 ***

###################################################################


The European Workshop on Computational Geometry will be held on
March 15-16-17 1999, at the Palais des Congres, Antibes
Juan-Les-Pins, France.

The goal of the workshop is to bring together the researchers in
Computational Geometry, facilitating - through an informal scheme -
the diffusion of their most recent work.

-------------------------------------------------------------------

INVITED SPEAKERS:

 [*] Bernard Chazelle, Princeton Univ. and Ecole Polytechnique.
 [*] Jeffrey S. Vitter, Duke Univ. and INRIA Sophia-Antipolis.
 [*] Jean-Marie Laborde, IMAG Grenoble.

-------------------------------------------------------------------

PARTICIPATION:

Participants are encouraged to give a 20 minutes presentation of
their work.  A title and a brief abstract (2-4 pages) should be
submitted (either PS files by email to cg99@sophia.inria.fr or
camera-ready papers by regular mail to the address below) before
January 15th, 1999. Numbered pages are OK as they will be
overwritten.  The workshop language will be English.  If the number
of presentations is too large, a selection will be made by the
organizers.  No proceeding will be published but the abstracts will
be collected and distributed among the participants at the
Workshop.

DEADLINE FOR SUBMISSIONS : January 15th, 1999

--------------------------------------------------------------

E-mail: cg99@sophia.inria.fr
URL:    http://www.inria.fr/prisme/cg99/

--------------------------------------------------------------

IMPORTANT DATES

January 15th, 1999: Deadline for submissions 
January 25th, 1999: Program available from the web page 
February 10th, 1999: Deadline for hotel registration
February 28th, 1999: Deadline for registrations 
March 15th, 1999: Beginning of the conference 

##############################################################


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From compgeom-owner@research.bell-labs.com  Wed Jan 20 02:21:50 1999
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Date: Sat, 16 Jan 1999 18:44:44 -0500
To: compgeom-announce@research.bell-labs.com
From: Eden@Cs.McGill.Ca (Eden)
Subject: RE: Java Polygon & Point Editors
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Apparently my message about JeoEdit Java Polygon & Point Editors got
cut off in the middle on its way to the mailing list, so I am reposting it.

Here is all the information, including the URL.

-----------------------------------------------------------------------------

JeoEdit: Java Polygon & Point Editors
         created by Mark Grundland for Godfried Toussaint
         Computational Geometry Lab
         School of Computer Science at McGill University
         Montreal, Canada

The JeoEdit package, consisting of the JeoEditPoints applet and the
JeoEditPolygon applet, is a set of Java visual editors for computational
geometry. Their mission is to help the computational geometry community to
realize its algorithms and theorems on the internet, by providing a
flexible and easy interface for drawing a set of points or a polygon as
well as the means to communicate this geometric information to any applet.
These ready-to-use editors focus on user interaction while your applet can
concentrate on algorithmic calculation. The advantage of using the JeoEdit
editors is that, by providing a self-contained user interface for
manipulating geometric structures, they leave you free to create the applet
of your dreams without having to worry about how that interface works.

As a measure of its quality, the JeoEdit package has been awarded the "Top
5% of the Web" rating by the Java Applet Rating Service (JARS). The JeoEdit
applets have been thoroughly tested on Windows NT, Solaris, Linux, and Mac
platforms. They are currently free for non-commercial, educational use.

Web Site: http://cgm.cs.mcgill.ca/~godfried/jeoedit/
          Includes on-line manuals, development guide, and working examples.

Questions? Contact me at MGrund@PO-Box.McGill.Ca

                 - Mark Grundland
                   A student of the art of computing
                    & a freelance software developer.

-------------------------------------------------------------------------------





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From compgeom-owner@research.bell-labs.com  Wed Jan 20 02:32:43 1999
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Date: Sat, 16 Jan 1999 18:57:04 -0500
To: compgeom-announce@research.bell-labs.com
From: Eden@Cs.McGill.Ca (Eden)
Subject: The Virtual Stained Glass Workshop
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VoronoImage: The Virtual Stained Glass Workshop
             created by Mark Grundland
             School of Computer Science at McGill University
             Montreal, Canada

VoronoImage is Macintosh program that transforms any ordinary photograph
into an image of a stained glass panel. The magic is performed by fractal
Voronoi diagrams. The technique works through generating a partition tree
representing a fractal arrangement of discreet Voronoi diagrams, where each
Voronoi polygon is recursively subdivided into a Voronoi diagram. The
Voronoi diagrams are calculated using a fast Euclidean distance mapping
algorithm.

Web Site: http://www.cs.mcgill.ca/~eden/VoronoImage/WebSite.html
          Includes on-line manual, technical guide,
          as well as a gallery of artwork created with VoronoImage.

Questions? Contact me at MGrund@PO-Box.McGill.Ca

                 - Mark Grundland
                   A student of the art of computing
                    & a freelance software developer.

-----------------------------------------------------------------------------





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From compgeom-owner@research.bell-labs.com  Wed Jan 20 02:41:53 1999
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Vega - Visualization Environment for Geometric Algorithms
Created by Christoph A. Hipke and Sven Schuierer
Institut fuer Informatik, Universitaet Freiburg, Germany

Vega is a new distributed and flexible environment for the
visualization of geometric algorithms. It is based on a 
client/server architecture where the algorithms run 
on UNIX servers making use of algorithm libraries such as 
LEDA and CGAL and the client runs on any Java Virtual Machine.

Features:
- User interface for interactively editing hierarchically
  structured scenes of geometric objects, starting 
  algorithms, and viewing the results
- Easy adaption of existing algorithms,
  support for LEDA and CGAL
- Flexible adjustment of the visualization output
  through view attributes
- Distributed asynchronous narrow-bandwidth protocol,
  on-line and off-line visualization

Information about Vega is available at the following URL.
For non-commercial purposes the Vega Client, Server, and
Library can be downloaded.
  http://ad.informatik.uni-freiburg.de/Vega

A Technical Report that provides an overview of the 
Vega system and its concepts is also available:
  http://www.informatik.uni-freiburg.de/tr/1998/Report117/

Please direct comments and questions to 
Christoph A. Hipke <hipke@informatik.uni-freiburg.de>



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From compgeom-owner@research.bell-labs.com  Thu Jan 21 16:38:53 1999
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From: Mark de Berg <markdb@cs.uu.nl>
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To: compgeom-announce@research.bell-labs.com
Subject: PhD positions at Utrecht University
Message-ID: <Pine.SGI.3.96.990121101442.22436B-100000@club.cs.uu.nl>
X-Org: Department of Computer Science; Utrecht University
X-Org: P.O. Box 80.089; 3508 TB  Utrecht; The Netherlands.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                               %
%               OPENINGS FOR  PhD STUDENTS                      %
%                     in the area of                            %
%         COMPUTATIONAL GEOMETRY AND ITS APPLICATION            %
%                          at                                   %
%               UTRECHT UNIVERSITY (the Netherlands)            %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


The Applied Algorithms group at the Department of Computer Science
at Utrecht University is one of the world's largest research groups
in the area of computational geometry. Currently the group has several
openings for PhD students. We seek both students who want to do
experimental research as well as students who are interested in
theoretical research. Possible projects include, but are not
limited to:

  * MOCCAM: Moving Objects in Complex CAD Models

    The goal of the MOCCAM project is to develop algorithmic techniques
    for motion support in CAD models, that is, the CAD system should be
    able to answer questions about the feasibility of motions of objects
    through the model. Such functionality is important for, for example,
    maintenance and replacement operations. The approach will be based on
    the probabilistic path planner, a technique developed for robot motion
    planning. Depending on the applicant, research in this project can 
    be more theoretical or more experimental.

  * Algorithmic Techniques for Computer-Generated Forces.
   
    This is a joint project with TNO-FEL, one of the laboratories of
    the Netherlands Organization for Applied Scientific Research (TNO).
    The goal of the project is to develop, analyze, and implement and
    test algorithms to support computer-generated forces, that is, computer
    simulations of real forces to be used for the training of military
    personnel. The project will focus on algorithms for geometric problems
    such as path planning, visibility computations, and collision detection. 
    This project has a clear experimental component.

  * Fundamental Problems in Computational Geometry

    Besides the two project above, there are also possibilities for
    PhD students interested in `pure' computational geometry. Possible
    topics are: kinetic data structures (where one studies geometric
    data structures for moving objects), realistic input models (where
    one studies computational geometry problems under certain restrictive
    assumptions on the input), or visibility problems.

Candidates should preferably have an MSc in computer science, and a firm
background in algorithms. Students with an MSc in mathematics will also
be considered if they have sufficient background in computer science.


ADDITIONAL INFORMATION
======================

THE APPLIED ALGORITHMS GROUP

The Applied Algorithms group is headed by prof. Mark Overmars.
The other staff members of the group are: dr Mark de Berg,
dr Marc van Kreveld, dr Twan Maintz, dr Frank van der Stappen,
dr Dirk Thierens, and dr Remco Veltkamp. In addition, there are
currently eight PhD students, two postdocs, and two scientific programmers.
The main theme of the group is computational geometry and its application
to areas like robotics, geographical information systems, computer vision,
and computer graphics and virtual reality. Besides that, research is
performed on medical image analysis and on evolutionary computing.


BEING A PhD STUDENT IN THE NETHERLANDS   

In the Netherlands, every PhD student gets paid a salary;
no additional grants are needed. Moreover, although PhD students
sometimes take courses, there is no minimum requirement.
Hence, PhD students are more like employees than like students.
Indeed, the Dutch word for PhD student translates to "research trainee".

The work of a PhD student includes assisting in courses
of the undergaduate program of the department. This amounts
to at most 20% of the time; the remaining time is spent on
research and research-related activities.



INTERESTED?
===========      

If you want to know more about the possibilities of becoming
a PhD student in the Applied Algorithms group at Utrecht University,
please contact dr Mark de Berg (markdb@cs.uu.nl).

More information is also available on our web-page:
http://www.cs.uu.nl/groups/AA/


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From compgeom-owner@research.bell-labs.com  Sun Jan 24 00:41:11 1999
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Date: Fri, 22 Jan 1999 14:51:19 +0100
To: compgeom-announce@research.bell-labs.com
From: Remco Veltkamp <Remco.Veltkamp@cs.uu.nl>
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We are pleased to announce release 1.2 of CGAL, the Computational 
Geometry Algorithms Library. Additions to release 1.1 include
- topological map
- planar map overlay
- constrained and regular triangulations

The CGAL project is a collaborative effort to develop a robust, easy to use, 
and efficient C++ software library of geometric data structures and 
algorithms. The CGAL library contains:
- Basic geometric primitives such as points, vectors, lines, 
  predicates such as for relative positions of points, and operations 
  such as intersections and distance calculation.
- A collection of standard data structures and geometric algorithms, 
  such as convex hull, (Delaunay) triangulation, planar map, polyhedron, 
  smallest enclosing sphere, and multidimensional query structures.
- Interfaces to other packages, e.g. for visualisation, and I/O, and 
  other support facilities. 

For further information and for downloading the library and its 
documentation,  please visit the CGAL web page:

    http://www.cs.uu.nl/CGAL/

Should you have any questions or comments, please send a message to 
cgal@cs.uu.nl



--------------------------------------------------------------------
Remco Veltkamp                  | email: Remco.Veltkamp@cs.uu.nl
                                | phone: +31-30-2534091
Dept. Computer Science          | fax:   +31-30-2513791
Utrecht University              | 
Padualaan 14                    | P.O. Box 80089
3584 CH Utrecht                 | 3508 TB Utrecht
The Netherlands                 | The Netherlands
--------------------------------------------------------------------

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To: "'compgeom-announce@research.bell-labs.com'"
	 <compgeom-announce@research.bell-labs.com>
Subject: WSCG'2000 Call for Papers, WSCG'99 Call for Participation
Date: Sat, 23 Jan 1999 16:22:54 +0100
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To be REMOVED from the mailing list, please, send an EMPTY message 
to the sender with the subject REMOVE <e-mail address to be removed>

To be INSERTED to the mailing list , please, send an EMPTY message 
to the sender with the subject INSERT <e-mail address to be inserted>

                 WSCG'2000 Call for Papers
                 =========================
                   The First Announcement
                   Deadline for papers: October 10, 1999
                   Conference dates: February 7. - 11., 2000
                   Information: http://wscg.zcu.cz

                 WSCG'99 Call for Participation
                 ==============================
You have the very last opportunity to present your paper 
                 before the year 2000
    and visit Prague - "The Golden City of the Europe"
Plzen (Pilsen) is the city of the best beer - Pilsner Urquell
                 Rich tourist program is available

-----------------------------------------------------------

	                   W S C G'99 

    The 7-th International Conference in Central Europe 
         on Computer Graphics, Visualization and
                Digital Interactive Media 99 

                    in cooperation with 

         EUROGRAPHICS and IFIP working group 5.10
         on Computer Graphics and Virtual Worlds

          will be held in February 8 - 12, 1999 
        in Plzen at the University of West Bohemia
       close to PRAGUE, the capital of the Czech Republic 
-----------------------------------------------------------------------
>> If you are willing to help us as a REVIEWER, please,              <<
>> fill in the form at the http://wscg.zcu.cz/reviewer.htm           << 
-----------------------------------------------------------------------

                         Conference Chairs
                         =================
     Nadia Magnenat Thalmann, MIRALab-CUI, Univ. of Geneva, Switzerland
           Vaclav Skala, Univ. of West Bohemia, Czech Republic

                 International Programme Committee
                 =================================
Bergougnoux,P.(F)    Chalmers,A.(UK)      Chen,J.(USA)      Fellner,D.(D) 
Ferko,A.(SK)         Groeller,E.(A)       Hubbold,R.(UK)    Iones,A.(RU) 
Jensen,W.H.(D)       Klein,R.(D)          Mockrzycki,V.(PL) Peroche,B.(F) 
Pratt,M.(USA)        Rossignac,J.(USA)    Sbert, M.(ES)     Seidel,H.-P.(D) 
Sillion,F.(F)        Slavik,P.(CR)        Slusalek,P.(D)    Sochor, J.(CR)    
Strasser,W.(D)       Stuerzlinger,W.(USA) Szirmay-Kalos,L.(H) Tokuta,A.(USA) 
Willis, P.(UK)       Wuetrich,C.(D)       Yagel, R.(USA)    Yukita,S.(J)
Zara, J.(CR) 
 
  
                Sponsors and supporting organizations
                =====================================
              Digital Equipment, Hewlett Packard, IBM, 
        Silicon Graphics, Intergraph, Bentley Systems, Microsoft

                        Topics included
                        ---------------
Fundamental algorithms, rendering and visualization, virtual reality, 
animation and multimedia, medical imaging, geometric modelling and fractals, 
graphical interaction, object-oriented graphics, WWW technologies, standards, 
computer vision, parallel and distributed graphics, computational geometry, 
computer aided geometric design, CAD/CAM, DTP and GIS systems, 
educational aspects of related fields, usage of graphics within mathematical 
software (Maple, Mathematica, MathCAD etc.) in education

The program includes international books exhibition and video show, too.
                     ---------------------------------------------

                      W S C G '99 International Exhibition
                      ------------------------------------

Information for exhibitors: Please contact the organiser as soon as possible
--------------------------  for detailed information and conditions.

The WSCG98 Exhibition will be held in parallel. Top leading European and Czech 
companies active in computer graphics, visualization and computer vision, 
CAD/CAM  and GIS systems, virtual reality, multimedia systems and others 
will be presenting their latest products.

Special programme will be available, too.
-----------------

Accepted papers will be published in the Conference proceedings with ISBN. 
They are reviewed by INSPEC, Cambridge Scientific Abstracts, InfoStore, 
IEEE , ISI , AIMS , INIST and others for citations index and other purposes. 
 
The best papers will be considered for possible publication in the Journal of 
Visualisation and Computer Animation, Computers&Graphics, The Visual Computer, 
Machine Graphics & Vision and others journals. 

	

             	Organizer and conference secretariat
             	------------------------------------
                            Vaclav Skala
                c/o Computer Science Dept., Univ.of West Bohemia
             Univerzitni 8, Box 314, 306 14 Plzen, Czech Republic

	e-mail: skala@kiv.zcu.cz	Subject: INFO WSCG99
	tel.:+420-19-7491-188		fax:+420-19-7491-188, 213
					fax:+420-19-7822-578


The latest information is available at: 

		http://wscg.zcu.cz	select WSCG'99

Information on all WSCG conferences:    http://wscg.zcu.cz	

In case of any problems use:            http://147.228.63.9




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From compgeom-owner@research.bell-labs.com  Thu Jan 28 22:03:04 1999
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Date: Wed, 27 Jan 1999 15:00:02 +0100
From: Laurent Moccozet <Laurent.Moccozet@cui.unige.ch>
Subject: [2nd CFP] Computational Geometry journal - Special Issue on Virtual
 Reality
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Call for Papers

Special Issue of the Computational Geometry Journal
on Computational Geometry in Virtual Reality

Submission due: February 15th, 99

Computational Geometry provides a wide range of efficient and original
solutions to problems faced by researchers in Virtual Reality. 

This special issue is dedicated to applications of Computational Geometry
to build, control, animate and display Virtual Worlds. Original,
research, practice, and experience papers are sought that address 
Computational Geometry aspects and applications in Virtual Reality.
Topics include, but are not limited to:

* 3D Geometric Shape Modeling.
* 3D Shape Morphing and Warping.
* Rendering Virtual Worlds.
* Visualization of Virtual Worlds.
* Realistic Textures Simulation 
	and Texture Mapping.
* Virtual Landscape Modeling.
* Natural Phenomenons Simulation.
* Articulated Characters Animation.
* Motion Control and Capture.
* Collision Detection in Virtual Worlds.
* Path and Route Planning in Virtual Worlds.
* Level of Details Management in Virtual Worlds.
* 3D Shape Simplification for Virtual Worlds.

Schedule:

		Paper submission: February 15, l999
		Acceptance/rejection notification: May 1, l999
		Final manuscript submission: June 15, l999
		Publication: late l999/early 2000

The guest editors of this issue are:

Prof. Nadia Magnenat-Thalmann,
thalmann@cui.unige.ch

and 

Dr. Laurent Moccozet
moccozet@cui.unige.ch

MIRALab, University of Geneva,
24 Rue du General Dufour
CH 1211 Geneva 4, Switzerland,

Submission guidelines:

Authors should carefuly check the guide for authors available from 
              http://www.elsevier.nl/locate/comgeo

           - Paper manuscript submission:

           Send five copies of the full manuscript to:

             Laurent Moccozet
             MIRALab, University of Geneva,
             24 Rue du General Dufour
             CH 1211 Geneva 4, Switzerland
	       FAX: +41 22 705 77 80
             phone: +41 22 705 76 19

           - Electronic submission:

           Authors may submit their paper by ftp. The electronic version of
your 
manuscript should be submitted in PDF (preferred) or  Postscript using 
anonymous ftp to cuisg34.unige.ch. The paper should be submitted as one 
file. The file name should be first  author's name. Please follow the 
procedure:
 

             ftp cuisg34.unige.ch 
             username: anonymous 
             password: <your email address> 
             cd cgta 
             put <filename> 
  
In any case, you should send an email to the editors with the title of the
paper, the authors with affiliation, the contact author, the abstract and
eventually the filename used for ftp.

----------
Laurent Moccozet		 	Laurent.Moccozet@cui.unige.ch
MIRALab/CUI, Universite de Geneve 	tel:+41 22 705 76 66
24 Rue du General Dufour		fax:+41 22 705 77 80
CH 12111 Geneve 4			http://www.miralab.unige.ch/~moccozet/

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Date: Wed, 27 Jan 1999 16:24:38 -0600
From: Jeff Erickson <jeffe@cs.uiuc.edu>
Organization: Dept. of Computer Science, Univ. of Illinois, Urbana-Champaign
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                       CALL FOR VIDEOS

       8th Annual Video Review of Computational Geometry

Background: This video review showcases the use of visualization in
computational geometry for exposition and education, as an interface
and a debugging tool in software development, and for the visual
exploration of geometry in research.  Algorithm animations, visual
explanations of structural theorems, descriptions of applications of
computational geometry, and demonstrations of software systems are all
appropriate.  Videos that accompany papers or communications submitted
to the technical program committee are encouraged.

The Video Review will be shown and distributed at the 15th Annual ACM
Symposium on Computational Geometry, to be held June 13-16, 1999 in
Miami Beach, Florida.  For more information about SCG, please see the
symposium web page at http://www.cs.miami.edu/events/SCG99/ .


Submissions: Authors should send one preview copy of a videotape to
the address below by February 13, 1999.  The videotape should be at
most eight minutes long (three to five minutes, preferred), and be in
VHS NTSC or VHS PAL format.

Each video tape must be accompanied by a one- or two-page description
of the material shown in the video, and where applicable, the
techniques used in the implementation.  Please format descriptions
following the guidelines for ACM proceedings.  Additional material
describing the contents of the videos, such as the full text of
accompanying papers, may also be included.

Textual material may be submitted electronically by e-mailing either
the URL of a PostScript file (preferred) or the PostScript file itself
to jeffe@cs.uiuc.edu.  If electronic submission is impossible, authors
should include 5 hard copies of the accompanying text with their video.

Videotapes and accompanying text should be sent to:

  Jeff Erickson
  Department of Computer Science
  University of Illinois
  1304 W. Springfield Ave.
  Urbana, IL  61801
  Phone: (217) 333-6769

For customs purposes, it is best to declare a value of $5.  If you have
questions, please contact the committee chair at jeffe@cs.uiuc.edu or
(217) 333-6769.

Notification: Authors will be notified of acceptance or rejection, and
given reviewers' comments by March 1, 1999.  For each accepted video,
the final version of the textual description will be due by March 15,
1999 for inclusion in the proceedings.  Final versions of accepted
videos will be due April 15, 1999 in the best format available.  The
accepted videos will be edited onto one tape, which will be shown at
the conference, distributed to the participants, and available from
ACM after the conference.

Video Program Committee:

  Danny Chen (Notre Dame)
  Jeff Erickson, Chair (U Illinois)
  John Sullivan (U Illinois)
  Subhash Suri (Washington U)
  Shang-Hua Teng (U Illinois)

-- 
Jeff Erickson                                 mailto:jeffe@cs.uiuc.edu
Computer Science Department           http://www.uiuc.edu/ph/www/jeffe
University of Illinois, Urbana-Champaign

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From compgeom-owner@research.bell-labs.com  Sat Jan 30 00:14:13 1999
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Subject: Resend: The Interactive Geometry Software Cinderella
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#######################################################

    Announcement: The Interactive Geometry Software

                   C I N D E R E L L A

#######################################################


We would like to announce that the new software for
doing interactive geometry on a computer is available
for demo-download at

       http://www.cinderella.de/demo/download.html

The software is published by Springer-Verlag,
Heidelberg and New York, and will be shipped in March
1999. It includes a 150pp manual and a CD-ROM.

Please see our web pages at http://www.cinderella.de
for details (in english and german language).

Thank you for your attention,

Juergen Richter-Gebert          Ulli Kortenkamp
ETH Zuerich                     ETH Zuerich


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From compgeom-owner@research.bell-labs.com  Tue Feb  2 20:28:58 1999
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                               CALL FOR PAPERS

          1999 Workshop on Algorithms And Data Structures (WADS'99)

           August 12-14, 1999 Vancouver, Britich Columbia, Canada

                     http://www.scs.carleton.ca/~wads/

                                Sponsored by
             The Pacific Institute for the Mathematical Sciences

The Workshop, which alternates with the Scandinavian Workshop on Algorithm
Theory, is intended as a forum for researchers in the area of design and
analysis of algorithms and data structures. We invite submissions of papers
presenting original research on the theory and application of algorithms and
data structures in all areas, including combinatorics, computational
geometry, databases, graphics, parallel and distributed computing.

Contributors are invited to submit a full paper (not exceeding 12 pages) by
e-mail to "wads@scs.carleton.ca". Detailed submission instructions are
located at http://www.scs.carleton.ca/~dehne/proj/wads/99/instr.html.
Submissions must arrive on or before March 1, 1999. Authors will be notified
of acceptance or rejection by April 30, 1999. Proceedings will be published
in the Springer Verlag series Lecture Notes in Computer Science. The final
versions of accepted papers must arrive in camera-ready form before May 21,
1999 to ensure the availability of the proceedings at the conference.
Selected papers will be invited for publication in a special issue of
Computational Geometry: Theory and Applications.

Invited Speakers (tentative): Charles Leiserson, Marc Snir, Nadia Magnenat
Thalman, Umesh Vazirani, and Jeff Vitter

Conference Co-Chairs: B. Bhattacharya and A. Gupta, Computer Science, Simon
Fraser University, wads_local@cs.sfu.ca, http://www.cs.sfu.ca/~wads

Program Committee:
Co-Chairs: F. Dehne (Carleton), A. Gupta (SFU), J.-R. Sack (Carleton) and R.
Tamassia (Brown).
PC-Members: A. Andersson (Uppsala), A. Apostolico (Purdue and Padova), G.
Ausiello (Rome), G. Bilardi (Padova) , K. Clarkson (Lucent), R. Cleve (Calgary),
M. Cosnard (INRIA-LORIA, France), L. Devroye (McGill), P. Dymond (York), M.
Farach-Colton (Rutgers), P. Fraigniaud (Paris), M. Goodrich (Johns Hopkins) A.
Grama (Purdue), M. Keil (Saskatchewan), D. Kirkpatrick (UBC), R. Krishnamurti
(SFU), D.T. Lee (Northwestern), F. Luccio (Pisa), A. Maheshwari (Carleton), G.
Plaxton (Univ. of Texas at Austin), A. Rau-Chaplin (Dalhousie), J. Reif (Duke),
F. Ruskey (U. Vic), P.G. Spirakis (Patras), L. Stewart (Alberta), H. Sudborough
(U. Texas Dallas), P. Vitanyi (CWI), P. Widmayer (ETH), C.K. Wong (Chinese U. 
Hong Kong).




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From: Peter Sanders <sanders@mpi-sb.mpg.de>
To: compgeom-announce@research.bell-labs.com
Subject: Reminder: Postdoc at MPI for Computer Science - Algorithms Group
Date: Tue, 3 Nov 1998 17:32:51 +0100 (MET)
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                   P O S T - D O C T O R A L

                      F E L L O W S H I P S

                             at the


              M A X - P L A N C K - I N S T I T U T E

                              for

                   C O M P U T E R   S C I E N C E




The Max-Planck-Institute for Computer Science is located on the
campus of the Universit"at des Saarlandes in Saarbr"ucken, Germany.
The institute was founded in 1990 and consists, at present, of
two research units: Algorithms and Complexity, and Logic of
Programming. Two new units: Hybrid Systems, and Computer Graphics
will be added in the first half of 1999.

The research group ALGORITHMS AND COMPLEXITY offers a number of
postdoctoral fellowships for the year 1999/2000. Fellowships are
available for one or two years and amount to DM 3,400 per month,
taxfree (approximately USD 2000). There is generous travel support
available and the group collaborates with several of the major
research institutions in Europe and USA.

The interests of the research group members includes data structures,
graph and network algorithms, computational geometry, parallel
algorithms, computational complexity, combinatorial optimization,
graph drawing, on-line algorithms, randomized algorithms,
computational biology and implementation of algorithms and program
libraries. The group consists mainly of young researchers of several
nationalities. The postdoctoral fellows are expected to interact with
group members and are encouraged to initiate research in their
individual areas of specialization. More information is available on
WWW at http://www.mpi-sb.mpg.de

Applications (including curriculum vitae, list of publications,
research plan, names of references with their e-mail addresses, and
intended period of stay) should be sent by FEBRUARY 28, 1998 to Kurt
Mehlhorn or Peter Sanders.

Further information can be also obtained from Peter Sanders
(sanders@mpi-sb.mpg.de).

Max-Planck-Institut f"ur Informatik
Im Stadtwald
D-66123 Saarbr"ucken
Germany

P.S. The working language in our group is English


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[Apologies if you get this message twice]

This is a list of accepted papers to CG'99, which will take place in Anti=
bes
in March 15-16-17 1999. For more information and registration, see

              http://www.inria.fr/prisme/cg99/

February 10th, 1999: Deadline for hotel registration=20
February 28th, 1999: Deadline for registration=20

See you in Antibes,
--=20
Herv=E9 Br=F6nnimann
Organizer CG'99


Two problems on separability with lines and polygonals
Ferran Hurtado, Merce Mora, Pedro A. Ramos, Carlos Seara

Efficient algorithm for finding 2 largest empty circles=20
Sergei Bespamyatnikh

Improved algorithms for placing undesirable facilities
Matthew J. Katz, Klara Kedem, Michael Segal

Geometric Solution concepts for planar ordered Weber Problems
Stefan Nickel, Justo Puerto, Ansgar Weissler

Dynamic Geometry I: the Problem of Continuity
Ulrich H. Kortenkamp, Juergen Richter-Gebert

Dynamic geometry II: Application
Ulrich H. Kortenkamp, Juergen Richter-Gebert

Constrained approximate pattern matching and its applications
Frank Nielsen

Implementing main-memory point-enclosure algorithms
Ulf Erikson

A simple and efficient sequential encoding for triangle meshes
Leila de Floriani, Paola Magillo, Enrico Puppo

Arrangement of curves in the plane: what does ``equivalence'' mean?
Manuela Neagu

Polygonal decompositions into singular and regular regions
Jairo Rocha

On some polyhedra covering problems
Cao An Wang, Bo-Ting Yang

Computations with tight bounding volumes for general parametric surfaces
Wilhelm Barth and Ernst Huber

Optimal illumination of points with restricted flood-light
A. Calatayud, J. Garcia, F. Gomez

Exact L_infinity nearest neighbor search in high dimensions
Helmut alt, Ulrich Hoffmann

A simple and efficient algorithm for high-quality line labeling
Pankaj K. Agarwal, Lars Knipping, Marc van Kreveld, Tycho Strijk,
Alexander Wolff

The Minkowski sum of a convex polyhedron and a polyhderal terrain
Antonio Hernandez-Barrerra, Subhas Chandra Nandy, Tetsuo Asano

Flipping edges in triangulations on the cylinder
Carmen Cortes, Clara I. Grima, Alberto Marquez

Parallel flips on planar triangulations
Jerome Galtier, Stephane Perennes

Delaunay graph on a prescribed graph
Manual Abellanas, Frank Harary

The design and implementation of planar maps in CGAL
Eyal Flato, Dan Halperin, Iddo Hanniel, Oren Nechushtan

3D Triangulations in CGAL
Monique Teillaud

A geometric approach to protein identification in 2D electrophoretic gel
images
Frank Hoffmann, Klaus Kriegel, Carola Wenk

Further results on arithmetic filters for geometric predicates
Olivier Devillers, Franco Preparata

Smooth shape reconstruction
Jean-Daniel Boissonnat, Fr=E9d=E9ric Cazals, Stephane Nullans

Matching shapes with respect to the symmetric difference
Helmut Alt, Christian Knauer

Computing the shape of a planar point set
Mahmoud Melkemi, Mourad Djebali

Searching a goal on m rays within a fixed distance
Christian Icking, Rolf Klein, Elmar Langetepe

On the zookeeper's problem
Haakan Jonsson

Polar diagrams of geometric objects
Clara I. Grima, Alberto Marquez, Lidia Ortega

Sweeping along a polygonal line to construct a Delaunay diagram
Pierre Kauffmann, Jean-Claude Spehner

Non-degeneracy properties of 3D longest-edge algorithms for the quality
refinement of triangulations
Maria-Cecilia Rivara

An algorithm for drawing a ring cover
Ala Eddine Barouni, Ali Jaoua, Nejib Zaguia

Turn regularity and optimal drawings of orthogonal representations
Stina Bridgeman, Giuseppe Di Battista, Walter Didimo, Giuseppe Liotta,
Roberto Tamassia, Luca Vismara

Orthogonal triangles in the plane
M.A. Garrido, Alberto Marquez, J.R. Portillo, P. Reyes

Graphs of non-crossing matchings
Maria del Carmen Hernando, Ferran Hurtado, Marc Noy

Space complexity of sectoral neighborhood spanners
Matthias Fischer, Tamas Lukovski, Martin Ziegler

On the topological walk method
Pierre Angelier, Michel Pocchiola, Stephane Riviere

Using train trascks to show that a trivial knot may require
exponential-size spanning disks
Joel Hass, Jack Snoeyink, William P. Thurston

The periodicity of integral convex hulls for conics in $\E^2$
Helymar Balza-Gomez

Rectangular duals and box-representation in the cylinder
Natalia de Castro, Francisco Javier Cobos, Juan Carlos Dana, Alberto Marq=
uez

An aperiodic tiles machine
Jos=E9 Caceres, Alberto Marquez

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Subject: Postdoc opportunity at Duke University
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	   VISITING ASSISTANT PROFESSOR POSITION AVAILABLE

		    Department of Computer Science
			   Duke University

A postdoctoral position at the level of Visiting Assistant Professor
of Computer Science is available in the Department of Computer Science
at Duke University, under the supervision of Prof. Jeff Vitter.
Duke is an equal opportunity employer.  The position is for one year
and can be extended for additional years by mutual consent.
Applicants must have clearly demonstrated experience and skills in
systems development.  Familiarity with external memory algorithms and
database algorithms is a definite plus.  Teaching responsibilities
include one research seminar per year if desired.=20

The position will include membership in the Center for Geometric
Computing, a collaborative effort funded by the Army Research Office
with participation from researchers at Brown, Duke, and Johns Hopkins
Universities.  The problems of interest center around high-performance
geometric computations.  They include development of efficient methods
for spatial databases and geographic information systems, especially
those dealing with massive amounts of data.

The candidate is expected to play a vital role in the development
and/or use of the TPIE programming environment for external memory
computation (http://www.cs.duke.edu/TPIE/).  Issues involving memory
hierarchies and parallel communication will also be considered.
Additional responsibilities will be to interact with agency scientists
and to help prepare contract, technical, and other reports.
The candidate will interact closely with geometric computing=20
groups at Brown, Johns Hopkins, and the Army Research Laboratories.

Please send a letter of interest and your CV, and ask three evaluators
to send letters of reference, by US Mail or email, to

   Mr. Keith Hurka-Owen
   Department of Computer Science
   Duke University Box 90129
   Durham, NC 27708-0129
   Email: hurka@cs.duke.edu=20
   Tel  : (919) 660-6535

To be assured of full consideration, all material including reference
letters must arrive by February 15, 1999.  Applications will
continue to be accepted until the position is filled.

--
Jeffrey S. Vitter              Email: jsv@cs.duke.edu             =20
Lehrman Professor and Chair    Phone: (919) 660-6548              =20
Department of Computer Science FAX:   (919) 660-6502              =20
Duke University, Box 90129     Home:  (919) 382-8724=20
Durham, N.C. 27708-0129        Web:   http://www.cs.duke.edu/~jsv/=20

Jusqu'=E0 fin juin 1999:

Jeffrey S. VITTER
Projet PRISME                  Phone: +33 4.92.38.77.49
I.N.R.I.A. Sophia Antipolis    Secr:  +33 4.92.38.77.38  (Agn=E8s)
2004, route des Lucioles       FAX:   +33 4.92.38.76.43
B. P. 93                       Email: Jeff.Vitter@sophia.inria.fr
06902 Sophia Antipolis Cedex   Web:   http://www.cs.duke.edu/~jsv/
FRANCE                                 =20

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From compgeom-owner@research.bell-labs.com  Mon Feb  8 16:05:10 1999
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Hello,

I would like to calculate B-spline curves that fit a series of nodes along
a polyline in the GIS I use.  After calculating the curve I would like to
be able to interpolate points along that curve at an approximate frequency
of 10 new nodes to 1 old node.  Optionally I would like to calculate these
new nodes at set distances along the curve - perhaps calculated by
intersecting a curve with the B-spline.  Does anyone have an algorithm to
do this without resorting to calculus - I would like some simple code to
achieve this.  Is this the correct list to ask such a question?  Ideally I
want to write a stand alone module in VisualBASIC to achieve this without
having to resort to other numerical libraries.

Thank you,

Ted Elliott

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From: "Vaclav Skala" <skala@kiv.zcu.cz>
To: <Undisclosed.Recipients@ori.zcu.cz>
Subject: WSCG'2000 Call for papers - Int.Conf on Graphics, Visulization & Ineractive Digital Media, close Prague, Czech Republic
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                         WSCG'2000
                 =========================
                 Sorry for duplicates
                 ---------------------
              Call for Papers & Participation

Deadline for papers:    October 13, 1999
Conference dates:       February 7. - 11., 2000
Information:           http://wscg.zcu.cz
--------------------------------------------------------

                    W S C G ' 2000

    The 8-th International Conference in Central Europe
         on Computer Graphics, Visualization and
                Digital Interactive Media 2000

                    in cooperation with

           EUROGRAPHICS, IFIP working group 5.10
           Computer Graphics International - CGI
          on Computer Graphics and Virtual Worlds

          will be held in February 7 - 11, 2000
                          in Plzen
       close to PRAGUE, the capital of the Czech Republic
-----------------------------------------------------------------------
>> If you are willing to help us as a REVIEWER, please,         <<
>> fill in the form at the http://wscg.zcu.cz/reviewer.htm      <<
-----------------------------------------------------------------------

                         Conference Chairs
                         =================
     Nadia Magnenat Thalmann, MIRALab-CUI, Univ. of Geneva, Switzerland
           Vaclav Skala, Univ. of West Bohemia, Czech Republic

    Keynote speakers
                         ================
      (preliminary)
 Carl Machover, Machover Associates Corp., USA
 Ben Delaney, CyberEdge Information Services, USA
 Philip J.Willis, Univ.of Bath, UK
 Andrej Iones, Univ.of St.Peterburg, Russia


                Sponsors and supporting organizations
                =====================================
                           (Preliminary)
              Compaq Computers, Hewlett Packard, IBM,
        Silicon Graphics, Intergraph, Bentley Systems, Microsoft,
             Autodesk, CyberEdge Information Services (USA)

                        Topics included
                        ---------------
Fundamental algorithms, rendering and visualization, virtual reality,
animation and multimedia, medical imaging, geometric modelling and fractals,
graphical interaction, object-oriented graphics, WWW technologies,
standards,
computer vision, parallel and distributed graphics, computational geometry,
computer aided geometric design, CAD/CAM, DTP and GIS systems,
educational aspects of related fields, usage of graphics within mathematical
software (Maple, Mathematica, MathCAD etc.) in education.

>>>  Papers on all aspects of computer graphics are encouraged  <<<

The program includes international books exhibition and video show, too.
                     ---------------------------------------------

                      W S C G '2000 International Exhibition
                      ------------------------------------

Information for exhibitors: Please contact the organiser as soon as possible
--------------------------  for detailed information and conditions.

The WSCG Exhibition will be held in parallel. Top leading European and Czech
companies active in computer graphics, visualization and computer vision,
CAD/CAM  and GIS systems, virtual reality, multimedia systems and others
will be presenting their latest products.

Special programme will be available, too.
-----------------

Accepted papers will be published in the Conference proceedings with ISBN.
They are reviewed by INSPEC, Cambridge Scientific Abstracts, InfoStore,
IEE, ISI, AIMS, INIST and others for citations index and other purposes.

The best papers will be considered for possible publication in the Journal
of
Visualisation and Computer Animation, Computers&Graphics, The Visual
Computer,
Machine Graphics & Vision and others journals.



   Organizer and Conference secretariat
   ------------------------------------
                            Prof.Ing.Vaclav Skala, CSc.
                c/o Computer Science Dept., Univ.of West Bohemia
             Univerzitni 8, Box 314, 306 14 Plzen, Czech Republic

 e-mail: skala@kiv.zcu.cz Subject: INFO WSCG
 tel.:+420-19-7491-188  fax:+420-19-7822-578, 799    include your e-mail!!!


The latest information is available at:

  http://wscg.zcu.cz select WSCG'2000

Information on all WSCG conferences:    http://wscg.zcu.cz

In case of any problems use:            http://147.228.63.9
or send a mail to  			maxvs@bath.ac.uk




~~~~~~~~~~~~~~~~~~~~~
Prof.Ing.Vaclav Skala, CSc.
University of West Bohemia
Univerzitni 8, Box 314
306 14 Plzen
Czech Republic
http://herakles.zcu.cz/~skala
Tel./record: +420-19-78 22 188 direct
Secretariat: tel: +420-19-78 22 212, fax  +420-19-78 22 213






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Dear Geometer

CGAL now also provides a discussion forum for users to communicate with other 
CGAL users and CGAL developers. To subscribe, please send a mail to 
lyris@postino.mpi-sb.mpg.de with content 'subscribe cgal-discuss-l' or 
subscribe on http://postino.mpi-sb.mpg.de/cgi-bin/lyris.pl?enter=cgal-discuss-l
&text_mode=0

Best regards
		
Stefan Schirra


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The report from the ACM Worksh. on Computational Topology, held last
June in Miami Beach in conjunction with SoCG, is now available in the
ACM Computing Research Repository, at http://xxx.lanl.gov/abs/cs.CG/9909001
It provides an overview of current problems in areas related to
topological computation, shape representation and reconstruction,
meshing, etc, and outlines some goals and recommendations for the area.

Incidentally, those of you on this mailing list who don't get the
announcements of papers in the CoRR should probably subscribe -- see
http://xxx.lanl.gov/list/cs.CG/recent for a list of recently uploaded
geometry papers and http://xxx.lanl.gov/help/subscribe for instructions
on how to add yourself to the mailing list.
-- 
David Eppstein       UC Irvine Dept. of Information & Computer Science
eppstein@ics.uci.edu http://www.ics.uci.edu/~eppstein/

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Date: Thu, 9 Sep 1999 11:19:10 +0200 (MET DST)
Message-Id: <199909090919.LAA20082@latrappe.cs.uni-magdeburg.de>
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Subject: PhD position in Magdeburg
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              PhD POSITION 

    in the Department of Computer Science, 
    University of Magdeburg 


We seek a PhD student for the research project 

     Quantification of fractures using techniques from 
     Computational Geometry, 

which is funded by the German Science Foundation (DFG). 

This is a joint project with the Department of Material Sciences 
in Magdeburg.   

The goal of the project is to design, analyze, implement and test 
algorithms to support the quantification of fractures in materials, 
starting from three-dimensional images obtained using a confocal 
lasermicroscope.   

There will be a close collaboration with faculty and PhD students 
in the Department of Material Sciences.  


Qualifications: Candidates should have a master degree in 
computer science or mathematics, and have a thorough background in 
algorithms, data structures, discrete mathematics, and possibly 
some experience in software development. 

The position is available for a period of two years, with a 
possible extension of one more year. 


For further information, contact 

Michiel Smid 
Department of Computer Science
University of Magdeburg
Universit"atsplatz 2
D-39106 Magdeburg
Germany

Phone: +49 (0)391 67 18557
Fax: +49 (0)391 67 11164

E-mail: michiel@isg.cs.uni-magdeburg.de

WWW: http://isgwww.cs.uni-magdeburg.de/~michiel/index.html



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From compgeom-owner@research.bell-labs.com  Mon Sep 20 21:57:44 1999
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To: compgeom-announce@research.bell-labs.com
cc: chen@euclid.cse.nd.edu
Subject: Chair position opening
Date: Thu, 09 Sep 1999 15:56:18 -0500
From: danny chen <dchen@cse.nd.edu>
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                UNIVERSITY OF NOTRE DAME
          Chair of Computer Science & Engineering

    The University of Notre Dame invites applications and 
nominations for the position of Department Chair and 
Schubmehl/Prein Chair of Computer Science & Engineering in the 
College of Engineering, effective August 22, 2000.

    The CSE Department provides a center of scholarship in the 
areas of information and computing technologies.  We see a 
continuing need for education and discovery in these fields to 
meet the demands of an expanding world population in areas such as 
medicine, food production, shelter, transportation, communication 
and commerce.

    The University of Notre Dame undergraduate program 
consistently ranks in the top 20 among national universities. The 
CSE Department, established in 1990, conducts undergraduate degree 
programs in Computer Engineering and in Computer Science, and a 
graduate program leading to the M.S. and Ph.D. degrees.  A full-
time faculty of 14, with scheduled growth to 18, develops 
curricula and directs research for multi-disciplinary 
collaborative programs in information technology, with particular 
focus on parallel distributed systems for high-performance 
computing, and the interactions among hardware, software, 
algorithms and VLSI technology.  Strong research programs achieve 
national recognition for technical contributions and growth.

    The chair has a unique opportunity with support from a new 
Dean of Engineering to substantially advance the role of computing 
and information technologies within the University.  Candidates 
must be eligible for appointment as a tenured full professor, and 
have appreciation, breadth and involvement in the range of 
disciplines embodying departmental growth.  The chair must share 
the Department's vision for academic excellence and foster 
productive academic relationships with other departments, 
especially in the College of Engineering.  The chair must have a 
personal research program with demonstrated experience in 
establishing standards for graduate scholarship  and forming 
active relationships with industry, government agencies, and other 
universities.

    For further information, visit our web site at  
http://www.cse.nd.edu/

    Applicants should send a complete resume with names of five 
references to:

Prof. Eugene W. Henry
CSE Chair Search Committee
384 Fitzpatrick Hall
University of Notre Dame
Notre Dame, IN 46556

Phone: 219-631-6408, FAX: 219-631-9260
E-mail: ewh@cse.nd.edu

The University of Notre Dame is an equal opportunity, affirmative 
action employer.


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From compgeom-owner@research.bell-labs.com  Mon Sep 20 22:02:38 1999
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	Fri, 10 Sep 1999 15:38:34 +0800 (HKT)
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The Department of Computer Science in the Hong Kong University of Science and
Technology will have a number of faculty positions open at all levels for the 2000/2001 
academic year. Current faculty members come from major universities and research institutions 
around the world.  There are roughly 590 undergraduate and 150 postgraduate students 
enrolled in our programs.  The medium of instructions is English.  More information 
about the Department can be found in our WWW page. (http://www.cs.ust.hk).

The Department is looking for faculty with research interests in all areas.  In
particular, there will be a permanent position available in theoretical computer 
science;  applicants for all levels are encouraged to apply  At the same time, we 
also welcome applications for visiting positions by senior theoretical computer scientists.
These visiting positions can run from five months through two years.  
The theory group currently comprises five members whose research focus on 
computational geometry, combinatorics, analysis of algorithms, data structures, and
formal languages.  More information about the theory group can be found in the 
URL http://www.cs.ust.hk/tcsc.  Ample research funding is available through government  
agencies and industry sponsored research institutes at the University.

Applicants should have a Ph.D. degree and demonstrated potential in
teaching and research. Senior applicants must have excellent teaching and
research records.

Salary and benefits are very competitive. Generous fringe benefits
including medical and dental benefits, annual leave, and children's
education allowance are provided. Housing benefits will also be provided
where applicable. Initial appointments will normally be on a three-year
contract which is renewable subject to mutual agreement.

Applications, together with a curriculum vitae and the names of at least
three referees, should be sent to our head:

     Professor Roland T. Chin, Head
     Department of Computer Science
     The Hong Kong University of Science & Technology
     Clear Water Bay, Kowloon
     HONG KONG
     Fax No.: (852)2358-2679
     E-mail: Roland_Chin@cs.ust.hk
     Internet: http://www.cs.ust.hk

Postscript format is preferred for applications sent through E-mail.
Applications will be evaluated immediately on receipt. Priority will be
given to applications received by January 31, 2000.


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From compgeom-owner@research.bell-labs.com  Mon Sep 20 22:06:41 1999
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Subject: Re: CGC Workshop on Computational Geometry, 2nd call
To: subodh@blaze.cs.jhu.edu (subodh)
Date: Wed, 15 Sep 1999 10:15:03 -0400 (EDT)
Cc: compgeom-announce@research.bell-labs.com
In-Reply-To: <no.id> from "subodh" at Sep 2, 99 01:46:54 pm
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In response to several requests for extension, the deadline for submission
to the workshop is hereby extended to 5pm on Friday, Sep 17.

- Subodh
########################################################################
Computer Sc., JHU, Baltimore MD 21218      Tel: (410)516-0060, Fax: 6134
http://www.cs.jhu.edu/~subodh

> 
>                             Call for Papers
>                          4th CGC Workshop on
>                         Computational Geometry
> 
>      Johns Hopkins University, Baltimore, MD, October 15-16, 1999
> 
> 
> 
> We are pleased to announce the fourth annual fall Workshop on
> Computational Geometry, sponsored by the Center for Geometric
> Computing, continuing a tradition established by the Mathematical
> Sciences Institute at SUNY-Stony Brook. The Center for Geometric
> Computing is a collaborative center of Brown, Duke, and Johns Hopkins
> Universities, and is funded by the U.S. Army Research Office.
> 
> 
> Scope and Format
> 
> The aim of this workshop is to bring together researchers from
> academia, industry, and the Army to stimulate collaboration on
> problems of common interest arising in geometric computations. Topics
> to be covered include, but are not limited to:
> 
>     Algorithmic methods in geometry
>     I/O-scalable geometric algorithms
>     Animation of geometric algorithms
>     Computer graphics
>     Solid modeling
>     Geographic information systems
>     Computational metrology
>     Graph drawing
>     Experimental studies
>     Geometric data structures
>     Implementation issues
>     Robustness
>     Computer vision
>     Robotics
>     Computer-aided design
>     Mesh generation
> 
> Following the tradition of the previous MSI and CGC Workshops on
> Computational Geometry, the format of the workshop will be informal,
> extending over 2 days, with several breaks scheduled for discussions.
> 
> Registration will be on-site, and will include the abstract booklet,
> coffee breaks, lunches, and a reception. There will be a registration
> fee of $75.
> 
> 
> Invited speakers
> 
>   To be Announced
> 
> 
> Submissions
> 
> Authors are invited to submit abstracts for talks to be given at the
> workshop. Please send an abstract (up to 2 pages) and a draft of a
> paper (if you have one). E-mail submissions are encouraged; send to
> cgc@cs.jhu.edu. Ideally, the abstract should be a PDF, PostScript,
> or LaTeX, file, for ease in assembling the abstract booklet. Abstracts
> can also be sent by regular mail to:
>   
>     Subodh Kumar
>     Department of Computer Science
>     Johns Hopkins University
>     224 NEB, 3400 N. Charles St.
>     Baltimore, MD 21218  
> 
> 
> Submissions should arrive by  September 10, 1999. Authors will be
> notified of acceptance by September 20, 1999.
> 
> A booklet of abstracts will be distributed at the workshop and made
> available electronically on the Web. There will be no formal
> proceedings for this workshop, but selected papers will be invited to
> a special issue of the journal "Computational Geometry: Theory and
> Applications".
> 
> Program Committee
> 
> Pankaj K. Agarwal (Duke University), Lars Arge (Duke University), Michael
> T. Goodrich (Johns Hopkins University), S. Rao Kosaraju (Johns Hopkins
> University), Subodh Kumar (Johns Hopkins University), Joseph S. B. Mitchell
> (State University of New York at Stony
> Brook), Franco P. Preparata (Brown University), Roberto Tamassia (Brown
> University), Jeffrey S. Vitter (Duke University).
> 
> Note:
> 
> For more information about the workshop, send mail to
> cgc@cs.jhu.edu . Further information will be posted to our web site:
> http://www.cs.jhu.edu/labs/cgc/cgc99
> as soon as it is available.
> 
> Important Dates
> 
> Deadline for submission      Sep 10 --> EXTENDED TO SEP 17.
> Notification of acceptance   Sep 20
> Conference                   Oct 15-16
> 


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                              CALL FOR PAPERS
                       Sixteenth Annual Symposium on
                           COMPUTATIONAL GEOMETRY

                              June 12-14, 2000
               Hong Kong University of Science and Technology
                    http://www.cs.ust.hk/tcsc/scg00.html

                    Sponsored by ACM SIGACT and SIGGRAPH

The Sixteenth Annual Symposium on Computational Geometry, featuring an
applied track, a theoretical track, and a video review, will be held at Hong
Kong University of Science and Technology, Hong Kong. We invite high-quality
submissions in the following areas:

   * geometric algorithms or combinatorial geometry, for the theoretical
     track, or
   * implementation issues or applications of computational geometry, for
     the applied track.

The proceedings, with the papers of both tracks, will be distributed at the
symposium and will subsequently be available for purchase from ACM. A
selection of papers will be invited to special issues of journals. During
the conference, sessions of presentations will alternate between the two
tracks, rather than being in parallel. Topics for the theoretical track
include, but are not limited to design and theoretical analysis of geometric
algorithms and data structures; lower bounds for geometric problems; and
discrete and combinatorial geometry. Topics for the applied track include,
but are not limited to experimental analysis of algorithms and data
structures; mathematical and numerical issues arising from implementations;
and novel uses of computational geometry in other disciplines, such as
robotics, computer graphics, geometric and solid modeling, manufacturing,
and geographical information systems. See below for additional information
on the two tracks.

Theoretical Track Submission

Electronic submissions are preferred for the theoretical track (see web page
above for instructions), but authors may instead mail 8 copies of an
extended abstract to arrive by December 6, 1999 to

                             Pankaj K. Agarwal
                       Department of Computer Science
                           LSRC Building, Rm D207
                              Duke University
                              Durham, NC 27706
                           Phone: (919) 660-6540
                             pankaj@cs.duke.edu

Applied Track Submission

Electronic submissions are preferred for the applied track (see web page
above for instructions), but authors may instead mail 11 copies of an
extended abstract to arrive by December 6, 1999 to

                               Steven Fortune
                                 Room 2c459
                             Bell Laboratories
                            600 Mountain Avenue
                           Murray Hill, NJ 07974
                           Phone: (908) 582-7042
                         sjf@research.bell-labs.com

Important Dates

 December 6, 1999:    Papers due, both tracks
 February 13, 2000:   Video submissions due
 February 15, 2000:   Notification of acceptance or rejection of papers
 March 1, 2000:       Notification of acceptance or rejection of videos
 March 15, 2000:      Camera-ready papers due
 April 15, 2000:      Final versions of videos due
 June 12-14, 2000:    Symposium

Papers that primarily address practical issues and implementation
experience, even if not tied to a particular application domain, should be
submitted to the applied track. Papers that primarily prove theorems should
be submitted to the theoretical track. Most experimental work should be
submitted to the applied track; an exception would be experiments in support
of mathematical investigations. Submissions to one track may be forwarded to
the other for consideration, unless the authors have explicitly stated
interest in one track only.

Papers should be submitted in the form of an extended abstract. Papers
should begin with the title of the paper, each author's name, affiliation,
and e-mail address, followed by a succinct statement of the problems and
goals that are considered in the paper, the main results achieved, the
significance of the work in the context of previous research, and a
comparison to past research. The abstract should provide sufficient detail
to allow the program committee to evaluate the validity, quality, and
relevance of the contribution. The entire extended abstract should not
exceed 10 pages, using 11 point or larger font and with at least one-inch
margins all around. For cases in which the authors consider it absolutely
essential to include additional technical details that do not fit into 10
pages, these details may be added in a clearly marked appendix that should
appear after the body of the paper and the references; this appendix will
not be regarded as a part of the submission and will be considered only at
the program committee's discretion.

Abstracts in hard copy must be received by December 6, 1999, or postmarked
by November 29 and sent airmail. Abstracts in electronic form are due by
December 6, 5:00 PM EST. These are firm deadlines: late submissions will not
be considered. Authors will be notified of acceptance or rejection by
February 15, 2000. A full version of each contribution in final form will be
due by March 15, 2000 for inclusion in the proceedings.

Conference Chairs

  Siu-Wing Cheng     Otfried Cheong
 scheng@cs.ust.hk  otfried@cs.ust.hk

Theoretical Track Program Committee

     Pankaj K. Agarwal, Chair (Duke)
     Franz Aurenhammer (Graz)
     Mark de Berg (Utrecht)
     Herbert Edelsbrunner (Duke)
     Jeff Erickson (UIUC)
     Hazel Everett (Montreal)
     Klara Kedem (Ben Gurion)

Applied Track Program Committee

     Gill Barequet (Technion)
     Steven Fortune, Chair (Bell Labs)
     Chris Gold (Laval U.)
     Ken Goldberg (Berkeley)
     Scott Mitchell (Sandia Labs)
     Tom Peters (U. Conn.)
     Jean Ponce (UIUC)
     Stefan Schirra (MPI)
     Subhash Suri (Wash. U.)

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Date: Mon, 13 Sep 1999 18:13:00 -0400 (EDT)
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                               CALL FOR VIDEOS
              9th Annual Video Review of Computational Geometry

                           to be presented at the

            Sixteenth Annual Symposium on Computational Geometry
                    http://www.cs.ust.hk/tcsc/scg00.html

                              June 12-14, 2000
               Hong Kong University of Science and Technology

                    Sponsored by ACM SIGACT and SIGGRAPH

Videos are sought for a video review of computational geometry.

Background

This video review showcases the use of visualization in computational
geometry for exposition and education, as an interface and a debugging tool
in software development, and for the visual exploration of geometry in
research. Algorithm animations, visual explanations of structural theorems,
descriptions of applications of computational geometry, and demonstrations
of software systems are all appropriate. Videos that accompany papers or
communications submitted to the technical program committee are encouraged.

Submissions

Authors should send one preview copy of a videotape to the address below by
February 13, 2000. The videotape should be at most eight minutes long (three
to five minutes, preferred), and be in VHS NTSC or VHS PAL format.

Each video tape must be accompanied by a one- or two-page description of the
material shown in the video, and where applicable, the techniques used in
the implementation. Please format descriptions following the guidelines for
ACM proceedings. Additional material describing the contents of the videos,
such as the full text of accompanying papers, may also be included.

Textual material may be submitted electronically by e-mailing either the URL
of a PostScript file (preferred) or the PostScript file itself to
rudolf@mpi-sb.mpg.de. If electronic submission is impossible, authors should
include five hardcopies of the accompanying text with their video.

Videotapes and accompanying text should be sent to

                              Rudolf Fleischer
                       Department of Computer Science
                           University of Waterloo
                         Waterloo, Ontario, N2L 3G1
                                   Canada
                        Tel: (519) 888-4567 ext 2103
                            FAX: (519) 885-1208

For customs purposes, it is best to declare a value of $5. If you have
questions, please contact the committee chair at rudolf@mpi-sb.mpg.de or
(519) 888-4567 ext 2103.

Notification

Authors will be notified of acceptance or rejection, and given reviewers'
comments by March 1, 2000. For each accepted video, the final version of the
textual description will be due by March 15, 2000 for inclusion in the
proceedings. Final versions of accepted videos will be due April 10, 2000 in
the best format available. The accepted videos will be edited onto one tape,
which will be shown at the conference and will be distributed to the
participants.

Video Program Committee

Therese Biedl (U. Waterloo)
Timothy Chan (U. Waterloo)
Erik Demaine (U. Waterloo)
Martin Demaine (U. Waterloo)
Rudolf Fleischer, Chair (U. Waterloo)
Anna Lubiw (U. Waterloo)
Jack Snoeyink (UNC)

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From compgeom-owner@research.bell-labs.com  Mon Sep 20 22:06:46 1999
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Date: Wed, 15 Sep 1999 09:22:23 EDT
From: Ramtin Khosravi <raamtin@ce.sharif.ac.ir>
To: compgeom-discuss@research.bell-labs.com
Message-ID: <009DE2E4.48392B20.41@ce.sharif.ac.ir>
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Hi everybody,

Does anybody know the e-mail address or the URL of the hompage of
Jindong Chen or Yijie Han? (The designers of the quadratic algorithm
for the shortest path problem on polyhedral surfaces).

Please reply to raamtin@ce.sharif.ac.ir.

Thanks,
--Ramtin Khosravi

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From compgeom-owner@research.bell-labs.com  Sat Oct  2 19:39:41 1999
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Message-ID: <001a01bf08ea$6aef4b60$5f0da8c0@aku.ac.ir>
From: "Ali Mohades" <mohades@cic.aku.ac.ir>
To: "geometry" <compgeom-discuss@research.bell-labs.com>
Subject: Help
Date: Mon, 27 Sep 1999 17:45:28 +0430
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0017_01BF0910.1627D860"
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This is a multi-part message in MIME format.

------=_NextPart_000_0017_01BF0910.1627D860
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	charset="iso-8859-1"
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hi everybody,

I would be very thankful to anyone who could provide me with e-mail =
address or any Webster which can help me to find the papers about a =
given subject in computational geometry.

Best wishes=20
---------------------------
Ali Mohades
Amir kabir University of Technology
Tehran, Iran
mohades@cic.aku.ac.ir
Tel: 98-21-640-6322
Fax: 1-603-925-7150
---------------------------


------=_NextPart_000_0017_01BF0910.1627D860
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.2314.1000" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV>
<P><FONT size=3D4><STRONG><EM>hi everybody,</EM></STRONG></FONT><FONT=20
size=3D4></FONT></P>
<P><FONT size=3D4>I would be very thankful to anyone who could provide =
me with=20
e-mail address or any Webster&nbsp;which can help me to find the papers =
about a=20
given subject in computational geometry<FONT =
size=3D4>.</FONT></FONT></P></DIV>
<DIV><FONT face=3DArial size=3D2>Best wishes =
<BR>---------------------------<BR>Ali=20
Mohades<BR>Amir kabir University of Technology<BR>Tehran, Iran<BR><A=20
href=3D"mailto:mohades@cic.aku.ac.ir">mohades@cic.aku.ac.ir</A><BR>Tel:=20
98-21-640-6322<BR>Fax:=20
1-603-925-7150<BR>---------------------------<BR></FONT></DIV></BODY></HT=
ML>

------=_NextPart_000_0017_01BF0910.1627D860--


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From compgeom-owner@research.bell-labs.com  Sat Oct  2 19:42:25 1999
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Sender: peyer@or.uni-bonn.de
Message-ID: <37F39028.9BACA747@or.uni-bonn.de>
Date: Thu, 30 Sep 1999 18:30:32 +0200
From: Sven Peyer <peyer@or.uni-bonn.de>
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Dear All,

I'm interested in Delaunay-Triangulation with respect to L1-norm. The
input consists of general, pairwise disjoint objects (e.g. lines, axis
parallel boxes, polygons, segments).

Shute, Deneen, Thomborson (Algorithmica (1991) 6: 207-221) gave an O(n
logn) Plane-Sweep Algorithm for Delaunay Triangulations for  L_max-norm
for single points. Since there exists an isometric between L1 and L_max
(equivalence
under 45 rotation), this algorithm solves the problem for single points
in L1 as well. 

This algorithm does not apply for more general objects. Recently,
Papadopoulou and Lee gave an algorithm for determing the L_max-Voronoi
diagram for arbitrary segments which could be applied to the L1 case.
Although their algorithm is very elegant, it has two disadvantages for
my purposes, unfortuntely: 

1. It calculates the Voronoi diagram instead of Delaunay Triangulation
(which could be retrieved afterwards from the Voronoi diagram). So I
hope there is a DIRECT way to get a triangulation (e.g. see algorithm by
Shute, Deneen, Thomborson for single points).

2. The algorithm is rather difficult and probably too slow in practice.
(Practice means here: Input of about 100000 or more objects)

So I've implemented a heuristic which discretizes all objects into a set
of single points (depending on a given parameter) and applies the
algorithm by Shute, Deneen, Thomborson to these points. The better
(smaller) the parameter (width) is the better is the result.
Nevertheless, it is a heuristic and the triangulation depends largely
upon the choosen parameter. If the number of objects is very large and
the width is choosen to be very small, memory problems occur because of
the large number of discretized points.

Therefore, I'm looking for an algorithm which gives an L1-Delaunay
Triangulation for general objects. 

Suggestions and references are very welcome. Thank you in advance.

Sven Peyer


--------
Sven Peyer
Research Institute for Discrete Mathematics
University of Bonn
Lennestr. 2
53113 Bonn

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From compgeom-owner@research.bell-labs.com  Sat Oct  2 19:55:22 1999
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Date: Fri, 1 Oct 1999 10:38:26 +0200 (MET DST)
From: Emo Welzl <emo@inf.ethz.ch>
Message-Id: <199910010838.KAA17570@shadow.inf.ethz.ch>
To: compgeom-announce@research.bell-labs.com
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----------------------------------------------------------------------------
                        European Graduate Program 
         Berlin  ------------------------------------------  Zurich       
                  Combinatorics, Geometry, and Computation
----------------------------------------------------------------------------


In the newly established graduate program two-year scholarships for 
    
                             Ph.d.students

are available in Berlin and Zurich starting January 1st, 2000. Applicants
should have a degree in mathematics, computer science, or a related area 
equivalent to the German or Swiss university diploma (e.g. M.S.) with grades 
significantly above average. Furthermore at each location a
 
                         postdoctoral position

is available for at most two years. 

The program is a joint initiative of the ETH Zurich, the three universities
of Berlin - Free University, Technical University, Humboldt-University - and 
the Konrad-Zuse-Research Center. The German partners are financially suppor-
ted by the German Research association (Deutsche Forschungsgemeinschaft,
DFG). The amount of the scholarships in Berlin is calculated according to 
the guidelines of the DFG and is up to DM 2690 per month, tax free (family 
supplement DM 400).

The scientific program ranges from theoretical fundamentals to applications.
The areas of research are combinatorics, geometry, optimization, algorithms
and computation, computer graphics, and vision. In Berlin the students are 
supervised by the professors Aigner, Alt, Rote, Schulz (FU), Moehring, Zieg-
ler (TU), Proemel (HU) and Groetschel (ZIB). The participating professors at
ETH Zurich are Fukuda, Van Gool, M. Gross, Luethi, Nievergelt, Richter-Ge-
bert, Schiele, Welzl and Widmayer.

Applications with curriculum vitae, copies of certificates, theses, a letter 
of recommendation of the last advisor, a brief description of the proposed 
research and, especially for applicants for the postdoctoral position, re-
prints of publications should be sent in until October 23, 1999 to one of 
the speakers of the program:

        in Berlin                        in Zurich

    Prof. Dr. Helmut Alt            Prof. Dr. Emo Welzl
    Institut fuer Informatik        Institut fuer Theoretische Informatik
    Freie Universitaet Berlin       ETH Zentrum 
    Takustrasse 9                   CH-8092 Zurich         
    D-14195 Berlin
    

Further Information can be obtained from
  
   Bettina Felsner                  Emo Welzl
   Tel. ++49-30-838 75 104          Tel. ++41-1-63 273 92
   bfelsner@inf.fu-berlin.de        emo@inf.ethz.ch

---------------------------------------------------------------------------

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From compgeom-owner@research.bell-labs.com  Sat Oct  2 19:55:24 1999
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Date: Thu, 30 Sep 1999 17:14:25 -0400 (EDT)
From: Chee Yap <yap@cs.nyu.edu>
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============== SOFTWARE RELEASE ANNOUNCEMENT ===================

The CORE Library, Version 1.2, is now available for free
download at

                http://cs.nyu.edu/exact/core

The CORE library is a collection of C/C++ classes for exact
computation with constructible real numbers.

Some Features:
   -- ease of use: most existing C/C++ programs can be
        converted into robust programs with minimal effort
   -- precision-driven approach to exact computation
   -- expanded set of sample programs
   -- library is small (0.75 MB compressed, including documentation)
   -- tested on Sparc, SGI and Linux platforms.

We welcome your comments and input.

-- Chee Yap (yap@cs.nyu.edu)
   Chen Li (chenli@cs.nyu.edu)
   September 30, 1999


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Date: Mon, 27 Sep 1999 14:05:28 +0200
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                 Posts in the Computer Science Department
         University of the Witwatersrand, Johannesburg, South Africa

                      Lecturer / Senior Lecturer
                            Senior Tutor
                       Tutor / Junior Lecturer


The Computer Science Department at the University of the Witwatersrand is
one of Africa's leading computer science departments.  We are committed to
educating graduates and producing research to meet South Africa's
challenging needs in information technology.

South Africa is in the process of political change.  The government is
re-evaluating tertiary education, and initial reports indicate tertiary
education is regarded as a high priority.  With a changing South Africa the
department sees a need to look ahead.  We are looking for staff who can
help us develop the research aspect of our department.  In exchange we
offer a vibrant environment and an opportunity to contribute to a country
at an important stage of its development.

We now have 10 academic staff members, and we wish to appoint up to 3 new
staff members, in order to expand our research and teaching roles.  We
would like new appointees at senior level to add strength of leadership to
existing research areas, but applicants from all areas of computer science
are welcomed and this could provide an opportunity for a motivated
researcher to develop their own research interests.

Applicants could be appointed at any one of the levels described below.
Which and how many posts are filled will depend on the applicants and the
seniority at which they are appointed.  Please indicate which position/s
you would like to be considered for when applying.

We are committed to equal opportunities, and for all posts, we
encourage black, women and disabled applicants.

Senior Lecturer/Lecturer:
========================
  These are tenure-track positions and successful applicants will be
expected to teach at undergraduate and postgraduate levels, undertake
research and perform departmental administration.  Applicants for the
senior lectureship should hold a PhD in computer science, have completed
some post-doctoral research and have teaching experience.  Applicants for
the lectureship should hold a PhD in computer science (or be able to
provide objective evidence that they will complete their PhD by the time
they take up the post).  Applicants should also be able to demonstrate
ability to teach a range of computer science courses.  A lectureship is a
suitable entry-level position for a new PhD.

Senior Tutor:
============
  This is a tenure track position, and a successful applicant will be
expected to teach undergraduate courses, and play an important role in
academic and curriculum development. The successful applicant should
have an honours degree in computer science. A higher degree and/or a
teaching qualification and/or experience will be a recommendation. The
successful applicant will be encouraged to undertake research in
computer science or computer science education.

Tutor/Junior Lecturer:
=====================
  This is an affirmative action/development position, and we will favour
applicants from under-represented groups in the field. The successful
applicant will have an honours degree in computer science. This person
will be expected to participate in the teaching of the department, and
an important objective of the post is to give a person with potential
the opportunity to pursue a higher degree and gain teaching and
research experience. This is a three-year contract post.

For senior lecturer or lecturer posts, we would prefer someone who will
strengthen one of our current research interests (see below), but the
primary criteria will be the quality and potential of the applicant.  The
tutor/junior lecturer must be prepared to pursue their higher degree in one
of the research areas of the department.

Please direct any inquiries about any aspects of these posts, or
the department, to

Conrad Mueller --- conrad@cs.wits.ac.za

Further information about the department can be found at
http://www.cs.wits.ac.za/

========================================================================

Context:
-------

The University of the Witwatersrand is one of the top universities in South
Africa.  It prides itself on its standards and is internationally
recognized.  The University is located in Johannesburg, the biggest city in
Southern Africa, and is thus strategically positioned in the industrial
heartland of South Africa.  This makes it an exciting and stimulating
situation in which to work.

The Department of Computer Science is in the Mathematical Sciences subject
area.  We are also presently involved in building an umbrella body with the
other IT departments at Wits -- the Department of Electrical Engineering
and the Department of Information Systems.  The Department has a governing
committee consisting of three members of the Department which reports
directly to the Dean of the Science Faculty.  There are 10 academic posts
in the department, with three technical support officers, an administrator
and a secretary.  The department is well equipped with both PC and Mac labs
for undergraduates which are networked to the internet and a UNIX server,
and an SGI lab for postgraduate students.

We see teaching as an important function of the department and all academic
members of staff are expected to be able to teach a range of mainstream
computer science topics.  The department has a strong undergraduate
programme, teaching only courses directed at students majoring in computer
science.  The undergraduate curriculum is based on the ACM/IEEE
guidelines for computer science, and regularly undergoes re-evaluation.
Many of our students have gone on to become respected members of the
academic and business communities worldwide.  The department teaches: a
first year course of 200 students, a second year course of 80 students, a
third year course of 70 students, an honours course of 15-25 students, and
3 to 5 higher degree students start each year.  Undergraduate students
register for a Bachelor of Science Degree, which has a flexible course
structure.

The department has always been very conscious of its role in South African
society.  A challenge the department is faced with is teaching students
with widely differing school qualifications, which includes students from
deprived educational backgrounds; empathy for these students is important.
We are very proud of our achievements in developing what we believe is an
outstanding undergraduate and honours degree course.  The emphasis has been
on trying to address the racial imbalances resulting from the historical
problems in our society and at the same time maintaining excellence.  The
department has been innovative in this aspect; we consider ourselves to be
leaders in the country in this regard and have received international
recognition.

As one of the leading universities in South Africa we feel that we are in
an ideal position to develop our research.  In addition, our location in
the industrial heartland provides largely untapped opportunities to develop
valuable research partnerships with industry and commerce.  The Department
would benefit greatly from such partnership: experience in setting up joint
research projects will be one of the criteria used in selecting the
candidates.  We are currently initiating programmes to coordinate joint
research and to support higher degree students.  Recently we have put
increased effort into developing our postgraduate programme.

We have a thriving research programme focused on aspects of dependable
computing.  Staff members are also involved in a number of other areas of
research -- machine learning, computational geometry, robotics, computer
science education, formal methods, verification, concurrency, process
algebras, image processing, pattern recognition, etc.

Please direct any informal inquiries to Conrad Mueller, conrad@cs.wits.ac.za
who is the current chair of the governing committee.

More information about the department can be found at
http://www.cs.wits.ac.za/ and more information about the University can be
found at http://www.wits.ac.za/

----------------------------------------------------------------
Ian Sanders                       Telephone:  (2711) 716-3269
Department of Computer Science    Fax:        (2711) 339-3513
University of the Witwatersrand                      403-9317
Private Bag 3                     ian@cs.wits.ac.za
2050 WITS SOUTH AFRICA            http://www.cs.wits.ac.za/~ian





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From compgeom-owner@research.bell-labs.com  Sat Oct  2 19:58:02 1999
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To: compgeom-announce@research.bell-labs.com
Subject: Announce: 3D connected components program
From: wrf@ecse.rpi.edu (Wm. Randolph Franklin)
Date: Thu, 23 Sep 1999 20:38:29 -0400
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This is to announce my latest program, CONNECT, which finds the
connected components in a 3-D rectangular volume of binary voxels
(the universe). For each component, CONNECT writes its volume,
surface area, and voxels (grouped into runs). CONNECT can do both
6-connectivity and 26-connectivity.

CONNECT is very space- and time-efficient. E.g., processing one
test volume of size 544x544x512, which has 151,519,232 voxels,
about 1/2 empty, to find the 534,723 6-connected components, takes
only 50 seconds of CPU and 45MB of virtual memory on a 233MHz
Pentium with Linux and g++.

The time for any particular case depends on the data complexity,
e.g., number of input runs and output components.   The worst
6-connectivity case would be to have alternating voxels full and
empty.

CONNECT could easily be extended to 4D volumes, if there was an
application.  It does 2D areas as a trivial subcase.  A
1x1024x1024 input is processed in under 1 second, with setup
overhead being most of that time.

I predict that CONNECT could process a 1024x1024x1024 universe in
10 CPU minutes, depending its complexity, tho the virtual memory
might page badly.  Does anyone have any real test data?

My confidence in CONNECT's correctness is based upon rotating the
large test case around the grand diagonal, rerunning CONNECT, and
sorting and comparing the output statistics of the components'
volumes and areas.  The results are identical.

I am the author of CONNECT.  You may use it for non-profit
research and education. You must make appropriate
acknowledgements.

For more info, including detailed usage and algorithm
descriptions, and a source tarball, go to

	      http://www.ecse.rpi.edu/Homepages/wrf/research/connect/

Comments are welcome.

------------------------
		      Wm. Randolph Franklin
                       Associate Professor
		     rfranklin@altavista.net
	      http://www.ecse.rpi.edu/Homepages/wrf/
		  +1 (518) 276-6077;  Fax: -6261
ECSE Dept., 6026 JEC, Rensselaer Polytechnic Inst, Troy NY, 12180 USA
			 (PGP key available)




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From compgeom-owner@research.bell-labs.com  Sun Oct 17 22:09:05 1999
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Message-Id: <199910111643.SAA12372@cyan.cs.bgu.ac.il>
To: compgeom-announce@research.bell-labs.com
Subject:  Euro-CG-2000 new web page
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+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

                   C A L L   F O R   P A P E R S

                     16TH EUROPEAN WORKSHOP ON
                      COMPUTATIONAL GEOMETRY

                        March 13-14-15 2000 
                Eilat Club Hotel, Eilat, Israel


+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

For more details please check our new web page

                 http://www.cs.bgu.ac.il/~cg2000

or its mirror site

                 http://www.cs.cornell.edu/kedem/Euro_CG_2000/euro.htm

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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From compgeom-owner@research.bell-labs.com  Mon Oct 18 04:10:44 1999
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From: "Dickinson, John" <John.Dickinson@nrc.ca>
To: compgeom-discuss@research.bell-labs.com
Subject: Looking for 3D of ND alpha-hull code.
Date: Mon, 4 Oct 1999 15:03:09 -0400 
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Dear All,

Anyone know of a good open code implementation of weighted alpha-hulls for
3D point clouds?  Or even just an alpha-hull generating algorithm for 3D
point clouds?  I would like to avoid rebuilding the wheel.

I have located the work on alpha shapes at:
http://fiaker.ncsa.uiuc.edu/alpha  but the web site is inaccessible

There is also one algorithm implementation at
http://www.netlib.org/voronoi/index.html

but this code doesn't do weight alpha-hulls and I always try to find out if
other code samples exist before settling on one previos implementation.

John
--
-((Insert standard disclaimer here))-|--- Washington Irving (1783-1859)-
John Kenneth Dickinson               |   "A sharp tongue is the only
Research Council Officer  IMTI-NRC   |    edge tool that grows keener
email: john.dickinson@nrc.ca         |    with constant use."


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From compgeom-owner@research.bell-labs.com  Mon Oct 18 04:10:46 1999
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Date: Sat, 09 Oct 1999 06:58:49 -0400
Subject: Funding opportunity in the US (international collaboration is also
	 encouraged)
From: "Jack Snoeyink" <snoeyink@cs.unc.edu>
To: "compgeom-announce" <compgeom-announce@research.bell-labs.com>
CC: jean-daniel.boissonnat@sophia.inria.fr, jsbm@ams.sunysb.edu,
        goodrich@cs.jhu.edu, pankaj@cs.duke.edu
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I was speaking with Kamal Abdali at NSF yesterday, and he wanted to make 
sure that the US computational geometry community knows about the following
funding opportunity
>  Title: Information Technology Research (ITR)
>     Type: Program Announcements & Information
>  Subtype: NSF-wide
>     http://www.nsf.gov/cgi-bin/getpub?nsf99167

Apparently the funding approval for $100M has just gone through congress,
which essentially increases the total computer science budget by 50% this
year. The increase is to meet the goals of the PITAC report.
Letters of intent for $3M centers and proposals over $500K are due Nov 15.

(The ITR program document also says that international collaboration is
encouraged.  Since NSF funds are spent in the US, what this usually means
that coordinated submissions to two or more different national granting
agencies will increase the chances of both.)

On behalf of the CG steering committee,

Jack Snoeyink@cs.unc.edu           UNC Chapel Hill, Computer Science
             CB 3175, Sitterson Hall, Chapel Hill, NC 27599-3175 USA
http://www.cs.unc.edu/~snoeyink ph+1(919)962-1969 fax+1(919)962-1799

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From compgeom-owner@research.bell-labs.com  Mon Oct 18 04:10:49 1999
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Try the homepage of "Computational Geometry: Algoriths and
Applications".
http://www.cs.uu.nl/geobook/
It links to a database containing 10,000 papers written on computational
geometry.

/Andreas


> Ali Mohades wrote:
> 
> hi everybody,
> 
> I would be very thankful to anyone who could provide me with e-mail
> address or any Webster which can help me to find the papers about a
> given subject in computational geometry.
> 
> Best wishes
> ---------------------------
> Ali Mohades
> Amir kabir University of Technology
> Tehran, Iran
> mohades@cic.aku.ac.ir
> Tel: 98-21-640-6322
> Fax: 1-603-925-7150
> ---------------------------

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