Send mail to: mgnet@cs.yale.edu for the digests mgnet-requests@cs.yale.edu for comments or help Anonymous ftp repository: casper.cs.yale.edu (128.36.12.1) Today's editor: Craig Douglas (douglas-craig@cs.yale.edu) Volume 2, Number 10 (October 15, 1992) Today's topics: Paper on data structures for adaptive multilevel methods Paper on Neural multigrid for gauge theories and other disordered systems European Multigrid Conference, EMG'93 (July 6-9, 1993) Workshop on Cluster Computing ------------------------------------------------------- From: Ulrich Ruede Subject: Paper on data structures for adaptive multilevel methods Date: Tue, 15 Sep 1992 13:38:44 +0200 I have downloaded a recent Tech. Report Data Structures for Multilevel Adaptive Methods and Iterative Solvers to the mgnet repository. The file 'data_struct.abstract' contains the abstract, the file 'data_struct.ps.Z' contains the paper itself as compressed postscript. I've used a new postscript converter that supposedly generates better postscript. Please send me any problem reports. The paper is 59 pages long. It discusses data structures of multilevel algorithms including implementation aspects. I attempt to treat the data structures from an abstract perspective and show how this can be exploited with advanced programming concepts, like object oriented programming using C++. Ulrich Ruede Editor's Note: mgnet/papers/Ruede/data_struct.* ------------- ------------------------------------------------------- Date: Mon, 21 Sep 92 21:42:50 +0200 From: Marcus Speh Subject: Paper on neural multigrid for disordered systems I downloaded the paper "NEURAL MULTIGRID for GAUGE THEORIES and other DISORDERED SYSTEMS", by M.Baeker, T. Kalkreuter, G. Mack and M. Speh (9 pages, 2 figures) The text is available in DVI, LaTeX and PS format. The figures are contained in an extra file in PS format. [See file README_nmg] This paper is our contribution to the conference "Physics Computing '92" in Prag, Czecheslovakia, August 24-18, 1992. It will appear in a special section of the Int. J. Mod. Phys. C ABSTRACT We present evidence that multigrid works for wave equations in disordered systems, e.g. in the presence of gauge fields, no matter how strong the disorder, but one needs to introduce a "neural computations" point of view into large scale simulations: First, the system must learn how to do the simulations efficiently, then do the simulation (fast). The method can also be used to provide smooth interpolation kernels which are needed in multigrid Monte Carlo updates. Keywords: Multigrid Neural Networks Disordered Systems Gauge Fields Neural Multigrid Comments, questions and suggestions are very welcome. Please contact me: Marcus Speh (marcus@ips102.desy.de) Editor's Note: mgnet/papers/Baeker-Kalkreuter-Mack-Speh/nmg.* ------------- ------------------------------------------------------- From: Piet Wesseling (NW) Subject: European Multigrid Conference, EMG'93 (July 6-9, 1993) Date: Thu, 15 Oct 92 12:00:37 MET Second Call for papers European Multigrid Conference, EMG'93 July 6-9, 1993 Amsterdam The Netherlands Following earlier conferences in 1981, 1985 and 1990 EMG'93, the fourth European Multigrid Conference will be held in Amsterdam, July 6-9, 1993. The conference aims at providing a forum for the presentation and discussion of recent research in the general area of multilevel methods. Participation is expected to be worldwide. Themes of the conference will range from basic research to industrial applications, including but not limited to the following subjects: * computational fluid dynamics, * reservoir engineering, * semiconductor device modeling, * statistical physics, * parallel computing, * adaptive computing, * numerical analysis of multigrid methods. PROGRAM The program of the fourth European Multigrid Conference will consist of invited lectures in plenary sessions and selected presentations in 2 parallel sessions. Members of the program committee are P.W. Hemker (CWI/University of Amsterdam) and P. Wesseling (Delft University of Technology) CALL FOR PAPERS Contributions to EMG'93 are solicited. Send 3 copies of an extended abstract of no more than 2 pages to the conference administrator. The deadline for submissions is 15 December 1992. Notifications of acceptance will be mailed on 30 January 1993. INVITED LECTURES Invited lectures will be presented by: * A. Brandt * C. Douglas * L. Fuchs * W. Hackbush * P. Lauwers * K. St\"uben * S. van de Walle * C.H. Venner * G. Wittum PROCEEDINGS Invited lectures and a number of selected presentations will be published as full papers in conference proceedings, to be published by Birkhauser. The other presentations will be published as full papers by CWI. A booklet with abstracts of all presentations will be available at the conference. CONFERENCE LOCATION: AMSTERDAM Amsterdam is the capital of the Netherlands and well-known for its canals, bridges, gabled houses and museums. Through the centuries, Amsterdam has been characterized by its international orientation and its political and religious tolerance. The city is considered a major international center of commerce, banking, press and publishing and ranks high on the worldwide list of cities favored with international conventions. CONFERENCE FEE The conference fee for EMG'93 will be NLG 400 for advance registration (to be paid by 1 April 1993) and NLG 500 after 1 April 1993. Costs for accommodation in Amsterdam will vary between NLG 80 and NLG 200 per night. ORGANIZING COMMITTEE P.W. Hemker F. Snijders P. Wesseling S. van der Wolff CONFERENCE ADMINISTRATOR EMG'93 - European Multigrid Conference 1993 c/o CWI Ms. Simone van der Wolff P.O. Box 4079 1009 AB Amsterdam The Netherlands Tel. 020-5929333 Fax. 020-5924199 email: simone@cwi.nl CONFERENCE SPONSORS AKZO NV CWI IBM Nederland NV KNAW - Royal Academy of Sciences IMPORTANT DATES * Now Fill out reply card and return to the conference administrator, unless you already returned the reply card from the first call for papers * 15 December 1992 Deadline for submissions * 30 January 1993 Notification of acceptance * 6-9 July 1993 Deadline for full papers EMG'93 in Amsterdam REPLY CARD EMG'93 [ ] I intend to participate to EMG'93 [ ] I intend to submit an abstract [ ] I wish to receive further announcements Name : __________________________________________________ Affiliation : __________________________________________________ Department : __________________________________________________ Address : __________________________________________________ Postal Code : _______________City : ____________________________ Country : __________________________________________________ Tel. : _______________________ Fax : __________________ Email : __________________________________________________ Send to: EMG'93 Conference Administrator CWI P.O. Box 4079 1009 AB Amsterdam The Netherlands -- Pieter Wesseling Faculty of Technical Mathematics and Informatics Delft University of Technology P.O. Box 5031 2600 GA Delft, The Netherlands Tel. +3115 - 783631 Fax +3115 - 787209 E-mail: witawes@dutinfh.tudelft.nl ------------------------------------------------------- Date: Tue, 25 Aug 1992 13:28:22 -0400 From: Dennis Duke Subject: Announcement - Workshop on Cluster Computing WORKSHOP ON CLUSTER COMPUTING Supercomputer Computations Research Institute Florida State University Tallahassee, Florida 32306 Wednesday, December 2 - Friday, December 4, 1992 Organizers: Peter Dragovitsch (drago@scri.fsu.edu), SCRI, FSU Dennis Duke (dduke@scri.fsu.edu), SCRI, FSU Uli Hansmann (hansmann@scri.fsu.edu), SCRI, FSU Neil Lincoln (nrl@nips.ssesco.com), SSESCO Vaidy Sunderam (vss@mathcs.emory.edu), Emory University The goal of the workshop is to bring together people who are interested in the issues of using heterogeneous clusters of computers as computational resources. This group of people would include: - computational scientists or other end-users who desire to exploit the power and capabilities of heterogeneous clusters as an alternative to conventional supercomputers or MPP's - software developers of queueing systems, parallel processing packages, and other software tools - system administrators interested in both the strategic and technical issues of running clusters, including in general any kind of heterogeneous collection of networked computers - vendors who are developing products to serve this market: (a) new generations of high performance workstations (b) new forms of packaging of workstations (c) new high speed networking products (d) new products for addressing mass storage and other I/O needs (e) any other applicable technology - persons who would like to share their experiences, and especially give critical advice on desired user requirements, shortcomings of present hardware and software configurations, successes and failures to date, overviews of planned projects, etc. Although most practical implementations of clusters to date consist of collections of RISC workstations, we are interested also in more general configurations which might include any number of distinct architectures, and a variety of new high-speed network interconnections. The format of the workshop will be to fill the day with contributed and invited talks, and to have informal evening gatherings designed to further enhance the opportunity for information exchange. We especially encourage contributions of a 'practical experience' nature, since this is likely to be of the most use to the many people who are involved in cluster computing, and will also be complimentary to the many conferences that stress more the academic side of computing and computer/computational science research. Please register for the workshop using the form attached below. We encourage as many attendees as possible to plan to make a presentation at the workshop. We do ask that speakers plan to address topics within the scope outlined above. Please send us a short abstract describing your talk, so we can plan an appropriate place in the schedule. An announcement of the schedule of speakers will be distributed as soon as possible. Within the limits of available time, we would like to accomodate as many speakers as practicable. The 'proceedings' of the workshop will be published via anonymous ftp. We will request each speaker to send us an approriate electronic version of his talk (ascii, postscript, tex, latex, troff, etc.). These will then be placed on the machine ftp.scri.fsu.edu for further distribution. Any questions or requests can be sent via email to cluster-workshop@scri.fsu.edu or to one of the organizers. SCRI can be reached by phone at (904)-644-1010. =============================================================================== REGISTRATION AND HOTEL INFORMATION WORKSHOP ON RISC CLUSTER COMPUTING December 2-4, 1992 PLEASE TYPE OR PRINT Name _____________________________________ Social Security Number ___________________ Company __________________________________ Address/Mailstop __________________________________________________ City/State/Zip/Country ____________________________________________ Email address _______________________________________ Workshop Program Number: 1903293 The registration fee for the workshop is $85, and includes three continental breakfasts, Wednesday and Thursday lunches, morning and afternoon break refreshments, and the food and drink for the evening sessions. There will be no workshop dinners. If you want to pay by check, please print out and fill in the above registration form, including especially the Workshop Program Number, and return the registration form and fee to: The Registrar Florida State University Conference Center 555 West Pensacola Street Tallahassee, Florida 32306 If you want to register by credit card, you may register by email by sending back an edited form of the above registration information, as well as the following credit card information: Credit Card Name _____________________________ Credit Card Number ___________________________ Name (as it appears on card) __________________________________ Expirations Date of Card _____________________ There is an additional 2% charge by the University for credit card registrations (bringing the total to $86.70). Email registrations, and all other inquiries about the workshop, may be sent to: email: cluster-workshop@scri.fsu.edu, or fax: (904)-644-0098, attention of Pat Meredith Hotel Information: The workshop hotel is the Holiday Inn, located within walking distance of the FSU Conference Center and SCRI on the FSU campus. The hotel does provide shuttle service to/from the Tallahassee airport. Rooms are $39 per night, single or double, and reservations should be made by November 10. Be sure to mention the Workshop on RISC Cluster Computing to get the special rate. Holiday Inn/Downtown University Center 316 West Tennessee Street Tallahassee, FL 32301 Phone: (904)-222-8000 Fax: (904)-222-8113 ------------------------------ End of MGNet Digest **************************