From nacomb@surfer.EPM.ORNL.GOV Sun Dec 1 16:29:43 1991 Return-Path: Received: from surfer.EPM.ORNL.GOV by CS.UTK.EDU with SMTP (5.61++/2.7s-UTK) id AA00707; Sun, 1 Dec 91 16:29:36 -0500 Received: by surfer.EPM.ORNL.GOV (5.61/1.34) id AA03931; Sun, 1 Dec 91 16:29:27 -0500 Date: Sun, 1 Dec 91 16:29:27 -0500 From: nacomb@surfer.EPM.ORNL.GOV (NA-NET) Message-Id: <9112012129.AA03931@surfer.EPM.ORNL.GOV> Subject: NA Digest, V. 91, # 48 Apparently-To: dongarra@cs.utk.edu Status: R NA Digest Sunday, December 1, 1991 Volume 91 : Issue 48 Today's Editor: Cleve Moler Today's Topics: SIAM Announces Internet Connection Need Faster Exponential Function Approximation New Book: Boundary and Interior Layers Position at Western Illinois University Position at the Australian National University Visualization '92 Announcing Allerton Conference 1992 Algorithms for Approximation, 1992 Neural and Stochastic Methods in Image and Signal Processing Submissions for NA Digest: Mail to na.digest@na-net.ornl.gov. Information about NA-NET: Mail to na.help@na-net.ornl.gov. ------------------------------------------------------- From: SIAM Date: Wed, 27 Nov 91 15:01:00 EST Subject: SIAM Announces Internet Connection SIAM Announces Internet Connection! As of Monday, December 2, 1991, SIAM's new electronic mail address is: siam@siam.org Several other electronic mail addresses will also be available for specialized purposes: All TeX submissions: tex@siam.org Membership inquiries, address changes and orders: service@siam.org Information about books, journals and publications: pubs@siam.org Conferences and meetings: meetings@siam.org SIAM News, our bimonthly news journal: siamnews@siam.org We also have individual mailbox addresses for correspondence regarding each of our journals: siap@siam.org simax@siam.org sicon@siam.org siopt@siam.org sidma@siam.org sinum@siam.org sissc@siam.org sima@siam.org sicomp@siam.org sirev@siam.org These addresses are not for TeX submissions. TeX submissions should be directed to: tex@siam.org. Please keep us up to date with your latest electronic mail address by mailing it to us at service@siam.org. Thank you. ------------------------------ From: Ole Holm Nielsen Date: Tue, 26 Nov 91 15:51:01 +0100 Subject: Need Faster Exponential Function Approximation I have a big application code running on an 8k Connection Machine CM-200, at it turns out that up to 50-75% of the time is being spent in calculating exponentials. Since the current implementation requires 395 clock cycles to deliver 4 results, I am looking for faster ways to evaluate exponentials. What I really need is the (32-bit precision) values of exp(-x) for x=[0,14) (x is always positive, and exp(-x) < 10^(-6) is considered negligible). Is there any known approximating function that can be evaluated faster than the built-in, general exponential function ? Polynomial or rational function, or whatever. Your help would be much appreciated. Please reply to: Ole.Holm.Nielsen@ltf.dth.dk Ole Holm Nielsen Laboratory of Applied Physics, Building 307 Technical University of Denmark, DK-2800 Lyngby, Denmark E-mail: Ole.Holm.Nielsen@ltf.dth.dk Telephone: (+45) 42 88 24 88 ext. 3187 Telefax: (+45) 45 93 23 99 Permanent address: UNI-C, Building 305 Technical University of Denmark, DK-2800 Lyngby, Denmark E-mail: Ole.Holm.Nielsen@uni-c.dk Telephone: (+45) 42 88 39 99 (dial-tone) 2404 or 2244 ------------------------------ From: J.J.H. Miller Date: Tue, 26 Nov 1991 11:02 GMT Subject: New Book: Boundary and Interior Layers We'd like to tell you about the first volume in a new BOOLE PRESS series on advanced computational methods for boundary and interior layers. This gives an overview of the latest techniques for solution of problems involving layers in more than one dimension. You'll find in it not just new ways of handling specific problems of interest, but also a host of open state-of-the-art research topics. The book's edited by Professor J.J.H. Miller of Trinity College, Dublin and Tritech/Numerical Consultants Ltd. Here are the chapters and their contributors: 1 The integral-difference method for quasilinear singular perturbation problems, by I.P. Boglaev and V.V. Sirotkin 2 The approximation of hyperbolic and convection-diffusion continuity equations, by R.S. Falk and G.R. Richter 3 The Scharfetter-Gummel discretization for drift-diffusion continuity equations, by P.A. Farrell and E.C. Gartland Jr 4 Spectral bounds and iterative methods in convection-dominated flow, by R.B. Kellogg 5 The construction of uniformly convergent finite difference schemes for singularly perturbed problems for a quasilinear elliptic equation, by J.J.H. Miller and G.I. Shishkin 6 An exponentially fitted finite element method for a stationary convection-diffusion problem, by J.J.H. Miller and S. Wang 7 An analysis of some exponentially fitted finite element methods for singularly perturbed elliptic problems, by E. O'Riordan and M. Stynes 8 A posteriori error estimates for elliptic boundary value problems, by L. Angermann and H.-G. Roos 9 Application of exponential fitting techniques to semiconductor device simulation, by W.H.A. Schilders 10 Non-equidistant finite difference methods for elliptic singular perturbation problems, by R. Vulanovic Please contact me for information on prices and procedures for ordering. Boole Press Ltd., P.O. Box 5, Dun Laoghaire, Co. Dublin, Ireland In case you need it, our telephone number is +1-280-8025. Our fax number is +1-280-2523. If you want to use our ISBN numbers, they are (hardback) ISBN 0-906783-92-5 and (paperback) ISBN 0-906783-93-3. Thanks. ------------------------------ From: Dave A. Voss Date: Mon, 25 Nov 91 16:52:32 CST Subject: Position at Western Illinois University POSITION IN APPLIED AND COMPUTATIONAL MATHEMATICS Western Illinois University Department of Mathematics Applications are invited for a tenure-track position at the assistant professor level in the areas of Applied and Computational Mathematics beginning Fall 1992, subject to funding. A Ph.D, or equivalent, is required. Commitment to superior teaching and potential for research is expected. Teaching at both the bachelor's and master's degree levels. Send curriculum vita, photocopies of graduate transcripts and at least three letters of reference to: Meckinley Scott, Chairperson Department of Mathematics Western Illinois University Macomb, IL 61455 Tel: (309) 298-1054 The selection process will begin February 17, 1992. WIU is an equal opportunity/affirmative action employer. Applications are especially invited from minorities, women and handicapped persons. Note: For further information contact by email, Dave Voss (mfdav@bgu.edu) or A.Q.M. Khaliq (mfamk@bgu.edu) ------------------------------ From: Stephen Roberts Date: Tue, 26 Nov 91 18:56:56 EST Subject: Position at the Australian National University AUSTRALIAN NATIONAL UNIVERSITY Research Associate Computational Mathematics Department of Mathematics, The Faculty of Science Applications are invited for a research associate position funded by the Australian Research Council in the Department of Mathematics at the ANU, to work with Professor Michael Barber and Dr Stephen Roberts. The position will support a project investigating the development of efficient and accurate algorithms to solve partial differential equations on parallel architectures. Two advanced parallel computers --a Connection Machine CM-2 and a Fujitsu AP1000 are available at the ANU and the successful applicant will be responsible for the implementation and analysis of appropriate algorithms on these machines. Preference will be given to applicants who have experience of parallel computing or computational methods for partial differential equations. A PhD or equivalent qualification is necessary. The position is available for one year in the first instance. The salary range for a research associate is $A34,953-$A37,618. For further information contact: Dr S. Roberts, Tel 61-(0)6-249-4445, Fax 61-(0)6-249-5549, email: steve@laplace.anu.edu.au ------------------------------ From: Dr. Gregory Nielson Date: Mon, 25 Nov 91 15:32:36 -0700 Subject: Visualization '92 CALL FOR PARTICIPATION VISUALIZATION '92 October 19-23, 1992 Boston, Massachusetts Scientific visualization is an important research frontier shared by a variety of computational science & engineering fields. Visualization work is both interdisciplinary and a field in its own right. This conference focuses on interdisciplinary methods and supports collaboration among the developers and users of visualizations method across all of science, engineering, and commerce. The interdisciplinary nature of the conference is reflected in the diverse nature of the presentation formats that comprise the conference. PAPER Submissions Papers are solicited that present research results related to all areas of visualization, including visualization tools and methods, and discipline-specific applications. Gregory Nielson Arizona State University nielson@enuxva.eas.asu.edu Arie Kaufman SUNY Stony Brook PANEL Proposals Panel should address a topic of current interest with particular emphasis on presenting contrasting methods, results, or opinions. Nahum Gershon The MITRE Corporation gershon@mitre.org Larry Rosenblum Naval Research Laboratory INTERDISCIPLINARY CASE STUDIES A case study involves a detailed presentation of a use of visualization. Lloyd Treinish IBM T. J. Watson Research Center lloydt@watson.ibm.com Deborah Silver Rutgers University DEMONSTRATION Proposals Research groups from academia or industry, as well as vendors, are invited to demonstrate their work interactively. Matt Ward Computer Science Dept. matt@maxine.wpi.edu Paul Hazan Applied Physics Laboratory TUTORIAL Proposals Half-day and full-day course proposals are welcome for systems, methods, and application areas. Hikmet Senay George Washington University senay@gwusun.gwu.edu 202-994-5910 Roni Yagel Ohio State University WORKSHOP Proposals One or two day workshops on specific visualization methods or application areas will run simultaneously with the conference. Mike Rhodes Toshiba America miker@toshiba.com Jerome Cox Washington University CONFERENCE CHAIRS Georges Grinstein Univ of Massachusetts at Lowell Bruce Brown Oracle Corporation PROGRAM COMMITTEE CHAIRS R. Daniel Bergeron University of New Hampshire Carol Hunter Lawrence Livermore National Laboratory SCIENTIFIC ADVISORY BOARD CHAIR David Salzman Harvard University Visualization '92 is sponsored by the IEEE Computer Society's Technical Committee on Computer Graphics. ------------------------------ From: Paul Van Dooren Date: Wed, 27 Nov 91 09:15:23 CST Subject: Announcing Allerton Conference 1992 THIRTIETH ANNUAL ALLERTON CONFERENCE ON COMMUNICATION, CONTROL, AND COMPUTING SEPTEMBER 30 - OCTOBER 2, 1992 The Thirtieth Annual Allerton Conference will be held September 30 - October 2, 1992 at Allerton House, the conference center of the University of Illinois. Allerton House is located twenty-six miles southwest of the Urbana-Champaign campus of the University in a wooded area on the Sangamon River. It is part of the fifteen hundred acre Robert Allerton Park, near Monticello, Illinois. Papers presenting original research are solicited in the areas of communication systems, information theory and coding, detection and estimation, communication networks, mobile radio, control systems, adaptive control, optimization, dynamic games, large scale systems, robotics and automation, manufacturing systems, adaptive signal processing, spectral estimation and sensor arrays, signal and image reconstruction, image processing, neural networks, combinatorial and geometric algorithms, computational complexity, parallel and distributed computation and VLSI algorithms, numerical methods for signals and systems. Professor Jean-Claude Latombe of Stanford University will present the plenary lecture. Evening lectures will be delivered by David J. Kuck and Thomas S. Huang, both of the University of Illinois at Urbana-Champaign. Information for authors: Two kinds of papers are solicited. The first are regular papers for presentation in twenty minutes; these papers will be published in the conference Proceedings. The second are short papers suitable for presentation in ten minutes; only summaries of these papers will be published in the Proceedings. The purpose of the short paper category is to encourage authors to present preliminary results of their work. For regular papers, a title and a five to ten page extended abstract, including references and sufficient detail to permit careful reviewing are required. For short papers, a title and a thousand word summary are required. Two copies of the manuscript must be received by July 13, 1992. Manuscripts that are submitted as regular papers but cannot be accommodated in that category will be considered in the short paper category, unless the authors indicate otherwise. Authors will be notified of acceptance by August 24, 1992, at which time they will also receive special sheets for the preparation of papers for the Proceedings. The length of regular papers is limited to the equivalent of ten single-spaced 8 1/2-by-11 inch pages. The length of short papers is limited to two such pages. All manuscripts should be mailed to Allerton Conference, University of Illinois at Urbana-Champaign, Coordinated Science Laboratory, 1101 West Springfield Avenue, Urbana, Illinois 61801. Please indicate clearly the name and address of the author who should receive all subsequent correspondence. Conference Co-Chairs: Paul Van Dooren and Mark Spong COORDINATED SCIENCE LABORATORY AND DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN ------------------------------ From: J. C. Mason Date: Wed, 27 NOV 91 13:01:53 GMT Subject: Algorithms for Approximation, 1992 ALGORITHMS FOR APPROXIMATION : 1992 CALL FOR PAPERS NOTE CHANGE OF DATES 3rd International Conference run by Cranfield Institute of Technology at Lady Margaret Hall, Oxford. July 27 - 31, 1992 This will be the third in the series of conferences on Algorithms for Approximation. As in the first two conferences at Shrivenham, the aim will be to provide both good research and a friendly motivating atmosphere. The venue, Lady Margaret Hall, is an Oxford college with ample parking nearby, set in an attractive location adjacent to the University Parks and River Cherwell. The conference will provide an opportunity for the exchange of ideas about current research on the approximation of functions and data, including the design and analysis of algorithms and the application of approximation theory and methods to practical problem areas. Keynote speakers who have already accepted invitations include: I. Barrodale (Victoria, Canada) E. Grosse (AT & T Bell Labs, USA) C. de Boor (Wisconsin, USA) W. Light (Leicester, England) C. Brezinski (Lille, France) J.C. Mason (Cranfield, England) M.G. Cox (NPL, England) C.A. Micchelli (IBM , USA) W. Dahmen (Berlin, Germany) M.J.D. Powell (Cambridge, England) J. Gregory (Brunel, England) S. Seatzu (Cagliari, Italy) About 40 contributed papers will be presented. Please submit an abstract to the address below by February 15 for consideration. The Programme Committee is led by J.C. Mason (Cranfield) and M.G. Cox (NPL), with I. Barrodale (Victoria) and T. Lyche (Oslo). The proceedings will be published as a special issue of Numerical Algorithms , available in hardback, and all contributed papers will be considered for inclusion. The normal booking will start with Monday lunch and end with Friday lunch, and the full board charge (including conference dinner) will be #190 plus a conference fee of #100. We hope to offer a reduced conference fee to bona fide students. A booking form will be sent to you with the 2nd Announcement, if you indicate your interest in attending and/or submitting a paper by writing to Mrs. Elizabeth Smith Applied & Computational Mathematics Group, RMCS (Cranfield), Shrivenham, Swindon, Wilts. SN6 8LA England. ------------------------------ From: Jonathan Marshall Date: Sat, 30 Nov 91 15:43:08 -0500 Subject: Neural and Stochastic Methods in Image and Signal Processing Announcement and Call for Papers NEURAL AND STOCHASTIC METHODS IN IMAGE AND SIGNAL PROCESSING Part of SPIE's 1992 International Symposium on Optical Applied Science and Engineering <> 19-24 July 1992 <> San Diego Marriott Hotel and Marina and San Diego Convention Center <> San Diego, California, USA Conference Chair: Su-Shing Chen, National Science Foundation Program Committee: Griff Bilbro, North Carolina State Univ. Peter C. Doerschuk, Purdue Univ. Ibrahim M. Elfadel, Massachusetts Inst. of Tech. B.R. Frieden, Univ. of Arizona Seth Hutchinson, Univ. of Illinois Jonathan A. Marshall, Univ. of North Carolina/CH Arturo A. Rodriguez, IBM Corp. Guna Seetharaman, Univ. Southwestern Louisiana Silvia S. Shen, Lockheed Palo Alto Res. Lab Xinhua Zhauang, Univ. of Missouri/Columbia In a real-world environment, images and signals are usually subject to noise, and uncertainty prevails in mathematical models. A variety of methodologies have been developed for the processing and understanding of such images and signals. Some are stochastic, some are biological- ly motivated, and others are of a different nature. This conference will bring together researchers of various backgrounds, including neural networks, markov random fields, simulated annealing, genetic algorithms, probabilistic reasoning, stochastic processes, fuzzy rea- soning, and other reasoning schemes with uncertainty. Abstract Due Date: 23 December 1991 Manuscript Due Date: 22 June 1992 ------------------------------ End of NA Digest ************************** -------