From na-net@patience.stanford.edu Sun Apr 29 16:46:12 1990 Received: from sparky.EPM.ORNL.GOV by cs.utk.edu with SMTP (5.61++/2.3-UTK) id AA28500; Sun, 29 Apr 90 16:45:59 -0400 Received: from msr.epm.ornl.gov by sparky.EPM.ORNL.GOV (4.1/1.34) id AA04290; Sun, 29 Apr 90 16:44:31 EST Received: from beauty.Stanford.EDU by msr.epm.ornl.gov (5.61/1.34) id AA02433; Sun, 29 Apr 90 16:44:44 -0400 Received: from patience.stanford.edu by beauty.stanford.edu (4.0/inc-1.5) id AA15794; Sun, 29 Apr 90 13:37:57 PDT Received: from bravery.stanford.edu by patience.stanford.edu (4.0/inc-1.5) id AA02843; Sun, 29 Apr 90 13:02:09 PDT Received: by bravery.stanford.edu (4.0/inc-1.5) id AA12289; Sun, 29 Apr 90 13:07:04 PDT Date: Sun, 29 Apr 90 13:07:04 PDT From: na-net@patience.stanford.edu Message-Id: <9004292007.AA12289@bravery.stanford.edu> Return-Path: Subject: NA-NET distribution message Maint-Path: maintainer@na-net.stanford.edu To: na-net@patience.stanford.edu Reply-To: na-net@patience.stanford.edu Comment: requests, comments or problems to nanet@na-net.stanford.edu Comment: submissions to na@na-net.stanford.edu Status: RO NA Digest Sunday, April 29, 1990 Volume 90 : Issue 17 Today's Editor: Cleve Moler 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 Date: 29 Apr 90 18:23 +0200 Subject: Report on Midwest NA Day 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 Date: 28 Apr 90 17:27:52 GMT Subject: Request for Interesting ODE Systems 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 Date: Mon, 23 Apr 90 11:43:43 EST Subject: Teaching Laboratories 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 Date: Tue, 24 Apr 90 16:20:11 CDT Subject: Argonne Parallel Programming Class 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 Date: Thu, 26 Apr 90 13:42:14 PDT Subject: Postdoctoral Fellowship at LBL 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 Date: Thu, 26 Apr 90 18:26:47 CDT Subject: Offer to Share MATLAB Programs 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 Date: Fri, 27 Apr 90 16:18:28 +0200 Subject: Scandinavian Workshop on Algorithm Theory 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 ------------------------------ End of NA Digest ************************** -------