Subject: NA Digest, V. 94, # 35 NA Digest Sunday, August 28, 1994 Volume 94 : Issue 35 Today's Editor: Cleve Moler The MathWorks, Inc. moler@mathworks.com Today's Topics: NA Digest Calendar Temporary Address Change for Wei-Pai Tang New Address for Peter Petropoulos Sabbatical Address for Jane Cullum Temporary Address for Mike Osborne Seeking Position in CFD/Heat Transfer Seeking Position in Numerical Analysis Errata for Watkins Matrix Computations Book InterCom: Lean Mean Collective Communication Machine Parallel CFD Workshop at Oxford University Finite Element Mesh Generation Roundtable Workshop on Large-Scale CFD Problems Postdoc Position at CWI in Amsterdam Positions at NAG in Illinois and Hawaii Contents, SIAM Applied Mathematics Contents, SIAM Computing Contents, Computational and Applied Mathematics 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: NA Digest Date: August 28, 1994, 12:25:12 EDT Subject: NA Digest Calendar NA Digest Calendar Date Topic Place NA Digest # Sep. 6-10 Mathematics in Industry Kaiserslatern, Germany 7 Sep. 12 Scottish Computational Mathematics Strathclyde, Scotland 23 Sep. 22-24 Hellenic Mathematical Society Athens, Greece 8 Sep. 25-30 Computers and Mathematics Harare, Zimbabwe 28 Sep. 26 Dynamics of Discontinuous Systems Bristol, UK 20 Sep. 26-27 Acoustics and Electromagnetics Washington, DC 19 Sep. 26-28 Multilevel Methods Meisdorf, Germany 16 Sep. 26-28 Large-Scale CFD Problems Montreal, Canada 35 Sep. 26-30 Total Positivity Jaca, Spain 5 Sep. 28 Parallel CFD Oxford, UK 35 Sep. 30 Parallel Computing Oxford, UK 33 Sep. 30... Algorithms for Macromolecular Modeling Lawrence, KA 28 Oct. 2- 6 Applications of Operator Theory Winnipeg, Manitoba 17 Oct. 3- 4 ICASE/LaRC Industrial Roundtable Williamsburg, VA 33 Oct. 6- 7 Combustion, Environment, and Heating Columbus, Ohio 21 Oct. 6- 7 Large Systems of Equations Wuppertal, Germany 23 Oct. 9-11 European PVM Users Rome, Italy 30 Oct. 12-14 Scalable Parallel Libraries Mississippi State, MS 24 Oct. 13-14 60th birthday of Jean Descloux Lausanne, Switzerland 19 Oct. 17-20 Parallel Computational Fluid Dynamics Stuttgart, Germany 30 Oct. 18-21 High Performance Fortran Manno, Switzerland 34 Oct. 20-22 Systems, Control, Information Wuhan, China 8 Oct. 21-22 Wavelets and Image Processing Argonne, IL 34 Oct. 21-22 Differential Equations Knowville, TN 33 Oct. 22 Pacific Northwest N.A. Seminar Pullman, WA 31 Oct. 24-25 Finite Element Mesh Generation Albuquerque, NM 35 Oct. 24-26 Computational Molecular Dynamics Minneapolis, MN 19 Oct. 26-28 Singularities in PDEs Bristol, UK 26 Nov. 7- 9 Adaptive Grid Methods Hampton, VA 26 Nov. 12 Matrix Theory Salt Lake City, UT 21 Nov. 18 Parallell Computing Applications Utrecht, Nethelands 24 Nov. 14-18 SuperComputing '94 Washington, DC 6 Nov. 30... Computational Methods in Engineering Belo Horizonte, Brazil 11 Dec. 10-20 Knots&Nodes@Huia Huia, New Zealand 33 Dec. 16-19 Methods and Applications of Analysis Hong Kong 25 1995 Jan 3- 6 Computational Computer Design Maui, Hawaii 17 Jan. 9-10 Conference Honoring Ake Bjorck Linkoping, Sweden 26 Jan. 15-18 Bond Graph Modeling and Simulation Las Vegas, NV 4 Jan. 16-18 Markov Chains Raleigh, NC 7 Jan. 20-22 Numerical Treatment of Coupled Systems Kiel, Germany 34 Jan. 23-27 Optimal Design and Control Newport News, VA 31 Feb. 6- 9 Massively Parallel Computation McLean, VA 26 Feb. 8-10 Computational Issues in the Geosciences San Antonio, TX 27 Feb. 15-17 SIAM Conference on Parallel Processing San Francisco, CA Feb. 19-25 Applications of Interval Computations El Paso, TX 16 Mar. 17-18 Krylov Subspace Methods Raleigh, NC 29 Mar. 20-21 Nonconvex Energy Functions Rutgers, NJ 20 Mar. 28... Sci. Computation & Diff. Eqns. Stanford, CA 27 Apr. 2- 7 Multigrid Methods Copper Mountain, CO 30 Apr. 3- 6 Numerical Methods for Fluid Dynamics Oxford, UK 25 Apr. 24-28 3rd INRIA-SIAM Wave Propagation Conf. Juan-les-Pins, France 19 Apr. 26-30 Numerical Analysis & Applied Math. Constanza,Romania 26 May 21-24 Object-Oriented Numerics Conference Jackson Lake, WY 32 June 5- 9 Control and Information Shatin NT, Hong Kong 33 June 6-10 Inertial Manifolds Xi'an, China 21 June 18-21 Iterative Methods in Linear Albebra Blagoevgrad, Bulgaria 30 June 20-24 Honoring G. I. Marchuk Novosibirsk, Russia 28 July 3- 7 ICIAM, Int'l Cong. Indust. Appl. Math. Hamburg, Germany 23 July 10-12 Linear Algebra and Applications Manchester, UK 19 July 16... Mathematics of Numerical Analysis Park City, UT 5 July 17-21 Distributed Parameter Systems Warsaw, Poland 25 July 17-21 Modelling and Optimization Warsaw, Poland 32 July 31... Rocky Mountain Numerical Analysis Salt Lake City, UT 32 Aug. 27-31 Circuit Theory and Design Istanbul, Turkey 25 Sep. 17-21 Acoustics of Submerged Structures Boston, MA 22 ------------------------------ From: Wei-Pai Tang Date: Mon, 22 Aug 1994 09:15:30 -0700 Subject: Temporary Address Change for Wei-Pai Tang Effective immediately until 1 July 1995, my address will be: Wei-Pai Tang Mail Stop T20-G 5 RIACS NASA Ames Research Center Moffett Field, CAA 94035-1000 Email address: wptang@riacs.edu ------------------------------ From: Peter Petropoulos Date: Mon, 22 Aug 94 12:52:27 -0500 Subject: New Address for Peter Petropoulos New address for Peter Petropoulos Peter G. Petropoulos Dept. of Mathematics Rm. 208 Clements Southern Methodist University Dallas, TX 75275 Phone: (214)768-3243 Fax: (214)768-3056 e-mail: peterp@golem.math.smu.edu ------------------------------ From: Jane Cullum Date: Mon, 22 Aug 94 21:14:40 EDT Subject: Sabbatical Address for Jane Cullum As part of the NSF Visiting Professorships for Women Program from September 1, 1994 through August 31, 1995, I will be on sabbatical from IBM to the Department of Computer Science, the Institute for Systems Research, and the UMIACS at the University of Maryland, College Park. During that period of time please send correspondence, e-mail, fax to the following addresses. Jane Cullum Department of Computer Science A.V. Williams Building Room 3269 University of Maryland College Park, MD 20742 Office Phone: (301) 405-6741 e-mail: cullumj at cs.umd.edu fax: (301) 405-6707. ------------------------------ From: Mike Osborne Date: Fri, 26 Aug 1994 09:08:20 -0500 Subject: Temporary Address for Mike Osborne For the Fall Semester my address will be Department of Computer Science Texas A&M University College Station TX 77832-3112 email mike@cs.tamu.edu M.R.Osborne ------------------------------ From: Mizanur Rahma Date: Mon, 22 Aug 94 23:40:07 PDT Subject: Seeking Position in CFD/Heat Transfer I am seeking a research position in CFD, Heat Transfer, Turbulence modeling and algorithm development in vector and parallel supercomputers. I finished my Ph.D. in aerospace Engineering from UT at Austin. Presently, I am working as a post-doctoral fellow at Washington State University. I would be happy to send my CV and reprints of my published papers to anybody interested. My email is : na.mrahman@na-net.ornl.gov Thanks for your attention. Sincerely Dr. Mizanur Rahman Civil & Environmental Engineering Dept. Washinton State University Pullman, WA 99164 Tel:(509) 335-4871 (O) ------------------------------ From: C. G. Broyden Date: Thu, 25 Aug 1994 10:39:02 +0200 Subject: Seeking Position in Numerical Analysis Dear Colleagues, It looks as if my contract with the University of Bologna may be coming to a premature end. If, therefore, there are any institutions out there that could use my services for a few years or so, I would be grateful to hear from them. Thank you, C. G. Broyden Professore di Calcolo Numerico at the University of Bologna, Italy, formerly Professor of Computing Science, University of Essex, U.K. C. G. Broyden, Universita' di Bologna, Facolta' di Scienze MM NN FF, via Sacchi N.3 47023 Cesena, Italy. Tel. (My office): xx39-547-642809 Tel. (Segreteria): xx39-547-610000 Fax: xx39-547-610100 ------------------------------ From: David Watkins Date: Tue, 23 Aug 94 11:09:39 -0700 Subject: Errata for Watkins Matrix Computations Book An errata list for the book Fundamentals of Matrix Computations by David S. Watkins John Wiley and Sons, 1991 ISBN 0-471-61414-9 is now available by anonymous ftp from amath.washington.edu. cd pub/watkins and get fmcerrata.ps.gz. If you would rather receive a hard copy, I would be happy to send you one. Contact me at david.watkins@na-net.ornl.gov. If you know of any errors in the book that are not on the list, I'd like to hear from you. I'd also like to know if you find any errors in the list itself. I plan to revise the book within three years or so, so if you have any suggestions for improvements, I would be grateful to hear them. DSW david.watkins@na-net.ornl.gov ------------------------------ From: Robert van de Geijn Date: Wed, 24 Aug 1994 14:10:07 GMT Subject: InterCom: Lean Mean Collective Communication Machine We would like to announce the official release of the Interprocessor Collective Communications (InterCom) Library, iCC release R1.0.0 for the Intel family of Supercomputers. This library is the result of an ongoing collaboration between Mike Barnett (University of Idaho), David Payne (Intel SSD), Satya Gupta (Intel SSD), Lance Shuler (Sandia National Laboratories), Robert van de Geijn (University of Texas at Austin), and Jerrell Watts (California Institute of Technology), funded by the Intel Research Council, Intel SSD, and the University of Texas Center for High Performance Computing. The library implements a comprehensive approach to collective communication. The results are best summarized by the following performance table, representative of improvements obtained on a 16 X 32 Paragon, running under R1.1 of the O/S: vector NX InterCom ratio Operation length (sec) (sec) (NX/InterCom) Broadcast 8 bytes 0.0012 0.0013 0.92 64K bytes 0.031 0.012 2.58 1M bytes 0.51 0.10 5.10 Collect 8 bytes 0.42 0.0076 55.3 (unknown len) 64K bytes 0.47 0.017 27.6 1M bytes 1.11 0.080 13.9 Similar, or better, improvement is obtained under R1.2. Attaining the improvement in performance is as easy as linking in a library that automatically translates NX collective communication calls to iCC calls. Furthermore, the iCC library gives additional functionality like scatter, gather, a number of global combine (summation) variants, and more general "gopf" combine operations. An MPI-like group collective communications interface is planned for the next release. We would like to note that this library is not intended to compete with MPI. It was started as a research project into techniques required to develop high performance implementations of the MPI collective communication calls. We are making this library available as a service to the user community, with the hope that these techniques eventually are incorporated into efficient MPI implementations. The library is available from netlib (shortly) and via anonymous ftp. Questions about the library should be addressed to intercom@cs.utexas.edu ------------------------------ From: Bette Byrne Date: Mon, 22 Aug 1994 14:23:00 Subject: Parallel CFD Workshop at Oxford University INSTITUTE FOR COMPUTATIONAL FLUID DYNAMICS One-Day Workshop on Grid Partitioning and Parallel Applications Wednesday, 28 September, 1994 University of Oxford FIRST NOTICE AND CALL FOR CONTRIBUTIONS This one-day workshop will cover a number of related topics in the parallel computation of numerical approximations of p.d.e.'s in fluid dynamics, electromagnetics and other similar areas. - grid partitioning - parallel libraries - parallelisation tools - parallel grid generation - 'real' applications on 'real' hardware. Speakers will include Dr M Berzins (University of Leeds) Prof M Cross (University of Greenwich) Dr P I Crumpton (University of Oxford) Dr Y Hu (Daresbury Laboratory) Dr J Reed (University of Oxford) Dr N P Weatherill (University College, Swansea) It is also hoped to have speakers from RAL and University of Southampton. Additional presentations are invited. Particularly welcome would be talks on the use of parallel computing within industry. The meeting will take place in the Computing Laboratory and is planned to begin at 10.00 a.m. with coffee. It is hoped to keep the meeting as informal as possible with a few keynote talks to provide an overview of current research, the rest of the meeting being available for further presentations. There will be a charge of \pounds20 for academics and \pounds40 for non-academics to cover our expenses which will include coffee, lunch and tea. If you require any further information please contact: Bette Byrne, Oxford University Computing Laboratory, Wolfson Building, Parks Road, Oxford OX1 3QD, Tel: (0865) 273883, Fax: (0865) 273839, Email: bette@comlab.ox.ac.uk. ------------------------------ From: Greg Sjaardema Date: Mon, 22 Aug 94 09:55:13 MDT Subject: Finite Element Mesh Generation Roundtable 3rd Annual MESHING ROUNDTABLE Finite Element Mesh Generation October 24 & 25 Albuquerque, NM Sponsored by Sandia National Laboratories We are announcing our 3rd annual Meshing Roundtable to be held in Albuquerque, NM, on October 24, and 25th at the Albuquerque Sheraton Old Town Inn. Mesh generation is an enabling technology for the finite element, finite difference, and finite volume analysis methods. The development of automated meshing techniques significantly simplifies the pre-processing task, and as such is of significant interest to the user community. This roundtable is aimed at providing an international technical exchange forum amongst researchers working in the field of automated meshing algorithms, particularly unstructured meshing algorithms. At this roundtable, noted researchers developing meshing technology will present their most recent work in algorithm development. We are soliciting additional technical presentations from researchers working in this field. Although one-page abstracts with an accompanying presentation are adequate, we encourage full papers. The abstracts, papers, and copies of the presentation material will be published in the conference proceedings and in refereed journals as appropriate. Many of the major vendors of finite element pre-processing codes will be in attendance and most will be presenting their technical work. This is not an advertising forum, but a technical forum. The roundtable will include both formal and informal presentations, as well as panel discussions and informal debates. Technology to be presented includes automated paving and plastering meshing techniques for quadrilateral and hexahedral meshes, new logical whisker weaving hexahedral meshing algorithms, medial axis decomposition methods for hexahedral meshing, new plastering methods for tetrahedral meshing, and adaptive meshing techniques. CONFERENCE DETAILS: Date: October 24 and 25, 1994 Place: Sheraton Old Town Hotel 800 Rio Grande Blvd NW Albuquerque, NM 87104 Reservations: 1-800-237-2133 For registration forms and information contact: Tammy Wilson Conference Coordinator (tjwilso@sandia.gov) MS 0441 phone: (505) 844-0180 Sandia National Labs fax: (505) 844-9297 Albuquerque NM 87185-0441 For technical information, contact: Ted Blacker Conference Chairman (tdblack@sandia.gov) MS 0441 phone: (505) 844-9785 Sandia National Labs fax: (505) 844-9297 Albuquerque NM 87185-0441 ------------------------------ From: G. Guevremont Date: Fri, 26 Aug 1994 14:42:10 -0400 Subject: Workshop on Large-Scale CFD Problems International Workshop on Solution Techniques for Large-Scale CFD Problems September 26-28, 1994 Montreal, Quebec , Canada THEME The Workshop should be of considerable interest to engineers, scientists and researchers using and/or developing CFD methods for scientific and industrial applications. The Workshop is structured to promote interaction between attendees and lecturers. Discussion periods will follow presentations. POSTER SESSION In addition to the invited lectures, there will be a Poster Session. Those wishing to participate should contact as soon as possible: Dr. M.P. Robichaud Numerical Methods Group, Mail Stop 01TA4 Pratt & Whitney Canada 1000 Marie Victorin Longueuil, Quebec, Canada J4G 1A1 Tel: +1-514-677-9411 (ext. 4731) Fax: +1-514-647-2506 e-mail: ec33937@lilac.pwc.utc.com TECHNICAL PROGRAM SESSION 1: ALGORITHMS FOR MASSIVELY PARALLEL ARCHITECTURES (Mon, Sept 26) L. Fezoui, Strategies for Navier-Stokes solvers on MPP machines T.E. Tezduyar, Parallel finite element computation of 3-D incompressible flows A. Yeremin, Aggregated iterative techniques for solving 3-D CFD problems on parallel and massively parallel computers SESSION 2: ALGORITHMS FOR VECTOR AND PARALLEL ARCHITECTURES (Mon, Sept 26) J-J. Chattot, Parallel implementation of a chemical nonequilibrium flow solver K. Fujii, Performance of a parallel-vector supercomputer and its application to large-scale CFD problems A. Peters, Solving large incompressible time-dependent flow problems on scalable parallel computers M.P. Robichaud, Parallel finite element methodology for turbomachinery calculations SESSION 3: CONVERGENCE ACCELERATION TECHNIQUES, I (Tue, Sept 27) N.M. Nachtigal, QMR methods in CFD J.E. Pasciak, Preconditioning the pressure operator for the time-dependent Stokes problem Y. Saad, Preconditioning Krylov subspace methods for CFD applications H.A. van der Vorst, An introduction to hybrid iteration methods SESSION 4: POSTERS (Tue, Sept 27) SESSION 5: CONVERGENCE ACCELERATION TECHNIQUES, II (Tue, Sept 27) A. Arnone, On the use of multigrid in turbomachinery calculations P.W. Hemker, Defect correction and nonlinear multigrid for the steady Euler equations Ch. Hirsch, Recent developments on high performance Navier-Stokes solvers B. Koren, Improving Euler computations at low Mach numbers SESSION 6: DOMAIN DECOMPOSITION METHODS (Wed, Sept 28) H.U. Akay, Efficiency considerations for explicit CFD solvers on parallel computers O. Axelsson, Multilevel iteration methods for the Navier-Stokes equations M.M. Hafez, FE/FV simulations of viscous flows based on a zonal Navier-Stokes formulation - Part III O. Widlund, Iterative substructuring methods for spectral elements in 3-D SESSION 7: APPLICATION TO FLOW SIMULATIONS (Wed, Sept 28) R.K. Agarwal, Large-Scale aerospace applications of CFD A. Jameson, Aerodynamic design methods K. Morgan, Unstructured mesh methods for aerospace applications SESSION 8: ROUND TABLE DISCUSSION (Wed, Sept 28) All technical activities will take place at the Hotel Ruby Foo's, 7655 Decarie Blvd., Montreal, Quebec (Tel. 1-800-361-5419 or 1-514-731-7701) Hotel Reservation deadline: Sept 1 (6000-person congress in town same week) If you need information on registration or local arrangements, please contact: Dr. G. Guevremont CERCA 5160 Decarie Blvd., suite 400 Montreal, Quebec Canada H3X 2H9 Tel: +1-514-369-5273 Fax: +1-514-369-3880 e-mail: grantg@cerca.umontreal.ca ------------------------------ From: Jan Verwer Date: Wed, 24 Aug 1994 11:42:59 GMT Subject: Postdoc Position at CWI in Amsterdam POSTDOC POSITION AT CWI IN AMSTERDAM Applications are called for a post-doc position at the Numerical Mathematics Department of CWI (the Center for Mathematics and Computer Science) in Amsterdam. The postdoc is to deliver a contribution to the project 'ALGORITHMS FOR ATMOSPHERIC FLOW PROBLEMS', in which we study numerical algorithms and develop software for transport-chemistry PDE problems occurring in air-pollution modeling. The PDE problems are large systems of advection-diffusion-reaction equations. The reaction part describes the atmospheric chemistry. The problems are highly CPU intensive and one of our focus points therefore is high-performance computing, in particular MASSIVELY PARALLEL COMPUTING is of interest. The position is open for approximately 6 months, starting at the end of 1994 or early 1995. The postdoc researcher will be instructed to port a given 3D code, developed on a CRAY C98/4, to a CRAY T3D (256 processors). His or her task will be to assess the algorithms in use for parallelization prospects, to compare the two codes, and to finish a report on the research at the end of the 6-month period. The algorithms currently employed are well described in written reports and research papers. Applicants should preferably have experience with the Cray T3D or a machine with a similar architecture. Their background should be numerical mathematics, numerical software, algorithms for PDEs, vector and parallel computing. Experience with atmospheric transport-chemistry problems would be advantageous but is not strictly necessary. Applicants should have finished their Ph.D. The postdoc position is made possible by a EC research grant associated with the Human Capital and Mobility (HCM) project 'The Equations of Fluid Mechanics and Related Topics'. The CWI Research Group is one out of 16 research groups participating in this HCM project, which is coordinated by the Ecole Polytechnique, Palaiseau, France, under the leadership of Prof. Jean-Claude Nedelec. The position is open only for CITIZENS FROM THE EUROPEAN COMMUNITY from OUTSIDE the Netherlands. The salary is in accordance with CWI standards. CWI's personnel department can assist in finding housing. Please apply to Jan Verwer at the address below. Send a CV, description of research interests and copy of your Ph.D thesis. Jan Verwer CWI Kruislaan 413 1098 SJ Amsterdam The Netherlands tel. +31205924095 fax. +31205924199 email: janv@cwi.nl ------------------------------ From: Karl E. Knapp Date: Wed, 24 Aug 94 14:47 CDT Subject: Positions at NAG in Illinois and Hawaii Two Position Announcements -- Numerical Algorithms Group, Inc Numerical Algorithms Group, Inc is the North American subsidiary of The Numerical Algorithms Group (NAG), Ltd, based in Oxford, U.K. NAG is one of the world's premier Scientific Software companies. It is primarily known for its Numerical Libraries (in Fortran 77, C, and Fortran 90). NAG also develops and markets programming tools & compilers and a powerful Computer Algebra package. Scientific Visualization -- Chicago, IL area Recently, NAG obtained worldwide marketing and development rights to the IRIS Explorer Scientific Visualization package from Silicon Graphics, Inc. NAG Inc is now seeking a qualified individual to work in its Downers Grove, IL, office to help with development and to provide customer support of the IRIS Explorer product. Qualified candidates must have previous training or experience with Scientific Visualization software, preferably IRIS Explorer or AVS. The successful candidate must have strong UNIX, X-windows, and C++ programming skills. Superior communication skills are essential for this position. A background in an application area utilizing visualization is a plus, as is any experience in numerical computing. Occasional travel may be required. Parallel Algorithm Development / HPCC User Support -- Maui, Hawaii NAG Inc is seeking a Computational Mathematician for a limited-term (2 year) appointment to the Maui High Performance Computing Center in Kihei, Maui. NAG Inc is one of the MHPCC's industrial partners and already has one staff member on location at MHPCC's new complex, which houses an 80-node (soon to be 400-node) IBM SP2. The duties of this position will split the employee's time evenly between 1) providing applications consulting for MHPCC users and 2) developing scientific code for a new NAG Parallel Library. Qualified candidates must have a record of parallel algorithm research and an advanced degree in some computational science. Familiarity with High Performance Fortran, IBM SP2 systems, and portable software development issues are plusses. Previous FFT, numerical linear algebra, or optimization experience will be useful. U.S. citizenship is required. Salary for both positions will be commensurate with experience and qualifications. NAG Inc offers a generous benefits package, including medical & dental insurance, a liberal 401(k) plan, and four weeks of vacation per year. Reasonable relocation expenses will be paid by NAG. If you are interested in either of these positions, please write, email, or fax (no phone calls please) your resume or questions to: Karl E. Knapp, Technical Manager Numerical Algorithms Group, Inc. email: knapp@nag.com 1400 Opus Place, Suite 200 fax: 708-971-2706 Downers Grove, IL 60515-5702 ------------------------------ From: SIAM Date: Fri, 26 Aug 94 10:23:17 EST Subject: Contents, SIAM Applied Mathematics Contents SIAM Journal on Applied Mathematics Volume 54, Number 6, December 1994 Geometrical Aspects of the Diffraction of Critically Incident Bulk Waves and Gaussian Beams R. H. Tew The Gunn Effect: Instability of the Steady State and Stability of the Solitary Wave in Long Extrinsic Semiconductors Luis L. Bonilla, Francisco J. Higuera, and Stephanos Venakides Resolution and Stability Analysis of an Inverse Problem in Electrical Impedance Tomography - Dependence on the Input Current Patterns David C. Dobson and Fadil Santosa On the Dynamics of a Closed Thermosyphon J. J. L. Velazquez Resonant Mode Interactions and the Bifurcation of Combustion-Driven Acoustic Oscillations in Resonance Tubes Stephen B. Margolis Pseudospectra of the Convection-Diffusion Operator Satish C. Reddy and Lloyd N. Trefethen A Generalized Secondary Frost Heave Model Andrew C. Fowler and William B. Krantz Numerical Simulation of Uniaxial Compression of a Granular Material with Wall Friction Carl L. Gardner and David G. Schaeffer Algorithms for the Nonclassical Method of Symmetry Reductions Peter A. Clarkson and Elizabeth L. Mansfield Stable Rotating Waves in Two-Dimensional Discrete Active Media Joseph E. Paullet and G. Bard Ermentrout Exact and Asymptotic Solutions for the Time-Dependent Problem of Collective Ruin I Charles Knessl and Craig Steven Peters Heavy Traffic Asymptotics for a Gated, Infinite-Server Queue with Uniform Service Times Xiaoming Tan and Charles Knessl Variance Reduction for Simulated Diffusions Nigel J. Newton ------------------------------ From: SIAM Date: Fri, 26 Aug 94 14:01:13 EST Subject: Contents, SIAM Computing Contents SIAM Journal on Computing Volume 23, Number 6, December 1994 A Grammar-Based Approach Towards Unifying Hierarchical Data Models Marc Gyssens, Jan Paredaens, and Dirk Van Gucht Selecting Heavily Covered Points Bernard Chazelle, Herbert Edelsbrunner, Leonidas J. Guibas, John E. Hershberger, Raimund Seidel, and Micha Sharir Distributed Algorithms for Unidirectional Networks Yehuda Afek and Eli Gafni Simple and Fast Algorithms for Linear and Integer Programs with Two Variables Per Inequality Dorit S. Hochbaum and Joseph (Seffi) Naor Computing the Order of a Locally Testable Automaton Sam Kim and Robert McNaughton A Polynomial-Time Algorithm for the Perfect Phylogeny Problem When the Number of Character States is Fixed Richa Agarwala and David Fernandez-Baca Priority Queues and Permutations M. D. Atkinson and Robert Beals A Model for Asynchronous Shared Memory Parallel Computation Naomi Nishimura Tight Bounds on Oblivious Chaining Shiva Chaudhuri Requirements for Deadlock-Free, Adaptive Packet Routing Robert Cypher and Luis Gravano On Languages Reducible to Algorithmically Random Languages Ronald V. Book A Fast Algorithm for Optimum Height-Limited Alphabetic Binary Trees Lawrence L. Larmore and Teresa M. Przytycka Improved Algorithms for Linear Inequalities with Two Variables Per Inequality Edith Cohen and Nimrod Megiddo ------------------------------ From: Carlos Moura Date: Fri, 26 Aug 94 20:37:39 EST Subject: Contents, Computational and Applied Mathematics COMPUTATIONAL AND APPLIED MATHEMATICS (Matematica Aplicada e Computacional) Published by Birkhauser and SBMAC - Brazilian Society for Computational and Applied Mathematics Vol.13 n.1 1994 ANDREI BREAZNA Generalizations of Bendixson's Negative Criterion S. BERTOLOLUZZA and G. NALDI Some Remarks on Wavelet Interpolation ZHIJIAN HUANG A New Method for Solving Nonlinear Underdetermined Systems N. DENG, E. SPEDICATTO and M. ZHU A Local Convergence Theorem for Nonlinear ABS Algorithms Y. EBIHARA and M. KUROKIBA On Some Degenerate Quasilinear Wave Equations with Time Dependent Linear Damping M. C. VIEIRA and T. N. RABELLO Unilateral Problem for the Navier-Stokes Operators in Noncylindrical Domains Vol.12 n.3 1993 J. BAUMEISTER and E. R. von STOCKERT On an Integral Related to an Inverse Problem in Magnetocardiography J. DOUGLAS, Jr. and J. WANG A New Family of of Mixed Finite Element Spaces over Rectangles J. M. STERN and S. A. VAVASIS Active Set Methods for Problems in Column Block Angular Form W. C. CONNETT, W. L. GOLIK and A. L. SCHWARTZ A Super- convergent Scheme on Irregular Grids for Systems of Two-Point Boundary Value Problems ------------------------------ End of NA Digest ************************** -------