**Today's Topics:**

- Report on Midwest NA Day
- Request for Interesting ODE Systems
- Teaching Laboratories
- Argonne Parallel Programming Class
- Postdoctoral Fellowship at LBL
- Offer to Share MATLAB Programs
- Scandinavian Workshop on Algorithm Theory

From: Paul Saylor <saylor@inf.ethz.ch>

Date: 29 Apr 90 18:23 +0200

Report on Midwest NA Day at the University of Illinois.

Midwest NA Day was held Friday, April 7 1990 on the University of

Illinois, Urbana-Champaign campus. The informal gathering of invited

speakers and conference attendees was organized to pay tribute to

Professor Bill Gear and took special note of his retirement from the

University of Illinois, where he has been head of the Computer Science

Department since 1985.

The conference was originally proposed by Linda Petzold of Lawrence

Livermore National Labs and a former student of Bill Gear's.

The title -- Midwest NA Day -- was suggested by Gene Golub

of Stanford and the conference was organized by Steven Lee with

assistance from Mike Holst and Paul Saylor of the University of

Illinois. Approximately 70 people attended and 10 talks were given.

The speakers were:

Gene Golub (Stanford)

Roland Freund (RIACS)

Germund Dahlquist (Royal Inst. of Technology, Stockholm)

Linda Petzold (LLNL)

Bruce Suter (Air Force Institute of Technology)

Walter Gautschi (Purdue)

Dan Boley (University of Minnesota)

Shikang Li (Purdue)

Greg Ammar (University of Kentucky)

Biswa Datta (Northern Illinois University).

The talks covered topics in orthogonal polynomials, nonsymmetric

Lanczos iterations, ODEs, DAEs, neural networks, Lanczos algorithms

for controllability/observability, discrete least square

approximations, and the numerical solution of control problems.

NA Day was held in the fourth floor Tower Room of the new Beckman

Institute, which gave a panoramic view, such as it is, of the twin

cities of Champaign and Urbana. (The crystal brilliance of a cool,

sunny day partly compensated for the inadequate scenery.) Although the

location was impressive, it was the speakers who made NA Day

exceptional. The purpose of the meeting was a farewell gesture of

friendship for Bill Gear, and in this it succeeded. It may have also

succeeded in promoting closer ties among the NA community in the

midwest (with special thanks to our visitors from outside the midwest.)

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

From: Andy Froncioni <froncio@caip.rutgers.edu>

Date: 28 Apr 90 17:27:52 GMT

Does anyone out there have any interesting systems of ODE's

that they'd like solved? If so, please send them to us. We are

developing a tool to solve tough systems and would like to

test the tool.

Thanks,

Andy Froncioni

Andy Froncioni

Rutgers Univ., New Brunswick, N.J.

froncio@caip.rutgers.edu

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

From: John Holt <jnh@axiom.maths.uq.OZ.AU>

Date: Mon, 23 Apr 90 11:43:43 EST

TEACHING LABORATORIES

The purpose of this message is to solicit information from colleagues

concerning undergraduate computing laboratories. The University of

Queensland Mathematics Department is planning a significant upgrade to

our laboratory to cater for the large number of students taking courses

with computing content. It is proposed that the laboratory will be used

in courses including n.a., o.r., stats.,calculus, discrete maths, etc.

At present we have 24 graphics terminals to our UNIX system and 16

XT clones which can also emulate terminals to the UNIX system.

It is planned to install around 40 new stations. There is a requirement to

run PC MATLAB for the n.a. people, MINITAB for the statisticians and

various other PC software products. In addition, we have developed

an inhouse computer aided teaching package in C under UNIX which we

wish to run. The hardware solution appears to us to be a network of

PC's (probably AT's) with a 386 file server (or 486), and in addition,

to network the PC's to our PYRAMID 9810 UNIX system. Using terminal

emulation, we can run the UNIX applications as required. This will

also give us access to NAG and other packages on the PYRAMID.

Does anyone have any experience with such dual networking configurations?

Which PC networking software are you happy with?

What sort of security do people use on their computing labs?

We would appreciate any advice that you can offer on the above or any

related issue.

John Holt

(na.holt)

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

From: David Levine <levine@antares.mcs.anl.gov>

Date: Tue, 24 Apr 90 16:20:11 CDT

The Advanced Computing Research Facility (ACRF) at Argonne National Laboratory

is offering introductory courses on parallel computing to familiarize

potential users with the ACRF multiprocessors and parallel programming in

general. The courses are limited to 22 people on a first come first serve

basis.

Topics to be covered include:

1) Parallelizing compilers.

2) The Monitor package for portable parallel programming.

3) Programming the Butterfly 2.

4) Programming the AMT DAP.

5) Programming the Connection Machine-2.

6) Introduction to the LAPACK project.

The format of the course is alternating lectures and hands-on work

with the parallel computers in the ACRF. Fortran will be emphasized as the

primary programming language. Knowledge of Fortran and Unix will be assumed.

A portion of the third day is available for each attendee to work on their

own particular project.

The schedule of classes for the remainder of 1990 is:

June 13-15 1990

August 22-24 1990

October 17-19 1990

December 5-7 1990

Parallel computers currently in the ACRF are:

4-processor Ardent Titan

8-processor Alliant FX/8

16-processor Intel iPSC-VX hypercube

20-processor Encore Multimax

24-processor Sequent Balance 21000

32-processor Intel iPSC-1 hypercube

45-processor Butterfly TC2000

1024-processor Active Memory Technology DAP

16384-processor Thinking Machines CM-2

Those interested in the class should contact:

Teri Huml

Mathematics and Computer Science Division

Argonne National Laboratory

Argonne, IL 60439-4844

(312) 972-7163

huml@mcs.anl.gov

There will be a $25.00 registration fee per person for universities,

federal laboratories and government organizations and $100.00 for

commercial organizations.

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

From: Paul Concus <concus@csr.lbl.gov>

Date: Thu, 26 Apr 90 13:42:14 PDT

Applications Invited for

Hans Lewy Postdoctoral Fellowship in Mathematics

at Lawrence Berkeley Laboratory

Applications are invited for the Hans Lewy postdoctoral

fellowship in the Mathematics Department of the Lawrence

Berkeley Laboratory. The fellowship, which was initiated

last year, is intended to enhance scientific research in the

U.S.A. by fostering a young Ph.D. to work in areas related

to the numerical solution of partial differential equations.

Of particular emphasis are those areas in which the LBL

Mathematics Department is active, such as fluid mechanics,

polymer physics, interface methods, iterative methods, and

parallel processing. Concomitant interests in the use of

advanced-architecture computers are encouraged.

Hans Lewy, who died in 1988, spent more than a half-

century as part of the Berkeley mathematics community. Much

of his work was in the area of partial differential equa-

tions, and a portion of it forms the foundation of the

theory of modern difference schemes for solving evolutionary

partial differential equations numerically.

Favorable funding may permit a new fellow to be

appointed as early as this fall. Interested applicants

should send a curriculum vitae and names of three references

to Ms. V. Heatlie, Lawrence Berkeley Laboratory, University

of California, Berkeley, CA 94720. Applications for this

fall should arrive before May 23, 1990. If the anticipated

early funding does not materialize, then applications sub-

mitted before May 23 will be held active, for applicants who

so desire, until selection early next year of a fellow whose

term will begin in the fall of 1992. The fellowship is for

one year, with possibility of renewal for a second year.

Support is provided primarily by special funds from the

Department of Energy Applied Mathematical Sciences Research

Subprogram, for which there is a stipulation that the reci-

pient be a U.S. citizen or permanent resident.

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

From: Howard Wilson <HWILSON%UA1VM.BITNET@Forsythe.Stanford.EDU>

Date: Thu, 26 Apr 90 18:26:47 CDT

This note is addressed to people interested in using high

level programming languages in physical applications.

Many people interested in applied mathematics already know

that MATLAB has been gaining wide use as a wonderful tool

for performing matrix computations and complex analysis.

However, MATLAB has probably been less widely recognized as

a powerful programming medium providing a very attractive

alternative to FORTRAN in many engineering and scientific

applications. After having used FORTRAN as my primary

computing tool for many years, it is a real joy to work with

a program language like MATLAB which greatly reduces many of

the pains which are so frustrating in the debugging of

FORTRAN code. I am thinking of the tedium of correcting

mistakes in long argument lists, and making sure the typing

and sizes of data arrays are correct. Since MATLAB creates

intermediate data variables dynamically and treats variables

as complex numbers, whenever appropriate, many of the

traditional 'stupid errors' which waste a lot of time when

we have to work with older generation program languages

simply go away. Consequently, we can get a program working

much sooner and can proceed to the primary task of getting

numerical results from a problem of interest.

Much of my professional effort as a teacher of mechanics is

devoted to instructing engineering students on how to solve

physical problems by use of computers. Any new tool is

welcomed which can accelerate the facility with which

numerical results are obtained. The appeal of not having to

tolerate debugging frustrations which go with along with

programming in widely used languages like Fortran, Basic,

Pascal or C is a welcome change. This is especially true to

someone whose primary priority is to solve physical problems

as opposed to embracing computer programming as a way of

life. Since MATLAB works so well for me and many of my

colleagues, I am eager to see its use grow and to share

instructional applications with other people of similar

interest. For this reason, Chris Bischof and I (with the

kind help of Jack Dongarra) have been able to establish a

MATLAB program collection under the NETLIB software

collection at ORNL. Any people who are not already familiar

with the MATLAB collection might like to drop a note to

Chris at Argonne (Bischof@anl.gov) and have your name added

to the MATLAB user group list. Furthermore I would be happy

to send any interested person an Email copy of the following

collection of MATLAB programs consisting of about 3000

source lines . Some of the programs are already included in

NETLIB. Others are simple instructional examples which may

not be appropriate for inclusion in a library. The

collection is certainly not a research contribution, but it

does show the versatility of MATLAB as an efficient

alternative to FORTRAN.

*** HWILSON Library Illustrating MATLAB Applications ***

BARIMAPC Longitudinal vibrations of a bar

BEMIMPAC Transverse vibrations of a beam

BESTERP Bessel interpolation and differentiation

BRACHIST Brachistochrone problem by nonlinear programming

CABLEDYN Nonlinear dynamic response of a cable

CHAOS Routines to illustrate chaos

DESTAB Stability regions for Runge-Kutta methods

DVDTP Interpolation by divided differences

ELIPS Rational function approximation for ellipse mapping

FHRSDE Forced harmonic response in structural dynamics

FOUPLA Fourier series expansion for general functions

GAUSSQ Routines for Gauss integrations

GJEROU Gauss-Jordan reduction with rounding

NELVIB Nelder-Mead function fit to vibration data

PENFORC ODE78 integrator for differential equations

POLHEDR Inertial properties of polyhedra

RECTOR Ractangle torsional analysis by point matching

SLAPERR Solution of Laplace's equation in a rectangle

SPACCURV Interpolation of data points on a space curve

SQUARMAP Conformal mapping of a circle onto a square

Any opportunity to confer with other kindred spirits who like

MATLAB would be welcomed by me and other users at the University

of Alabama.

Howard Wilson

Engineering Mechanics Department

University of Alabama

Box 870278

Tuscaloosa, Alabama 35487-0278

Telephone (205 348-1617)

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

From: Bengt Aspvall <bengt@eik.ii.uib.no>

Date: Fri, 27 Apr 90 16:18:28 +0200

CONFERENCE INFORMATION

The Second Scandinavian Workshop on Algorithm Theory (SWAT 90)

Bergen, Norway, July 11-14, 1990

The program committee has selected 34 papers for presentation. In addition,

there will be invited lectures by Juris Hartmanis, Robert E. Tarjan, and

David S. Johnson.

Springer-Verlag will publish the proceedings.

BIT will devote a special issue to papers from SWAT 90.

To obtain the complete program and registration forms, please contact

Bengt Aspvall,

Department of Informatics, University of Bergen,

Thormohlensgate 55, N-5008 Bergen, Norway

Phone: 47-5-544156

Fax: 47-5-544199

Email: bengt@eik.ii.uib.no

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End of NA Digest

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