\nopagenumbers \centerline{\bf CONCURRENCY: PRACTICE AND EXPERIENCE} \vskip 0.5in \noindent{\bf EDITOR} {\obeylines\smallskip {\bf Geoffrey C. Fox} Northeast Parallel Architectures Center Syracuse University 111 College Place Syracuse, New York 13244-4100 USA Tel: (315) 443-2163 Fax: (315) 443-1973 Email: gcf@nova.npac.syr.edu \smallskip} \vskip 0.25in \noindent{\bf ASSOCIATE EDITORS} {\obeylines\smallskip {\bf Anthony J. G. Hey} Southampton University, UK \medskip {\bf Paul Messina} California Institute of Technology, USA \smallskip} \vskip 0.25in \noindent{\bf EDITORIAL BOARD} {\obeylines\smallskip Donald M. Austin, {\it University of Minnesota, USA} Jacob Barhen, {\it Jet Propulsion Laboratory, USA} William J. Camp, {\it Sandia National Laboratories, USA} Erik DeBenedictis, {\it Scalable Computing, USA} Dennis Duke, {\it Florida State University, USA} W. M. Gentleman, {\it National Research Council of Canada, Canada} Milton Halem, {\it Goddard Space Flight Center, USA} Per Brinch Hansen, {\it Syracuse University, USA} Ken Kennedy, {\it Rice University, USA} H. T. Kung, {\it Harvard University, USA} Lennart Johnsson, {\it Thinking Machines Corporation, USA} David May, {\it INMOS Ltd., UK} Oliver McBryan, {\it University of Colorado, USA} Raul Mendez, {\it Institute for Supercomputing Research, Japan} Steve Otto, {\it Oregon Graduate Institute, USA} George Paul, {\it IBM Thomas J. Watson Research Center, USA} Dan Reed, {\it University of Illinois, USA} Joel Saltz, {\it University of Maryland, USA} Martin Schultz, {\it Yale University, USA} Karsten Schwan, {\it Georgia Institute of Technology} Danny Sorensen, {\it Rice University} David J. Wallace, {\it University of Edinburgh, UK} Andy White, {\it Los Alamos National Laboratory, USA} Hans Zima, {\it Institute of Statistics and Computer Science, Austria} \smallskip} \vskip 0.25in \noindent{\bf Submitting Manuscripts} \medskip Papers are encouraged from a broad range of authors and points of view and referees are chosen who will judge papers on quality and not approach. If you are interested in submitting a paper please contact the Editor directly at the address given above. Initially, you should supply three copies of your manuscript in hardcopy. When your paper has been accepted, the Publisher would prefer you to supply a machine readable version of the paper in \TeX house-style macros which are available from the Editor or Publisher. \vskip 0.25in \noindent{\bf Concurrency: Practice and Experience} is a major reference source for computer scientists who are involved in the design of concurrent computers and the associated languages and systems software. The practical stance is particularly useful for people from a wide variety of scientific disciplines---amongst them physicists, molecular biologists and chemists who need to utilize this high performance technology in their own application areas. \vskip 0.25in \noindent{\bf AIMS AND SCOPE} \medskip \noindent Recent developments in technology have stimulated the development of {\bf concurrent\/} computers. These machines consist of a collection of processors connected in a network---or alternatively a collection of processors sharing access to a common memory. These include both general purpose MIMD and SIMD architectures and special purpose systems such as neural networks. Optical and dataflow hardware can be expected in future. There are now several commercially available concurrent computers and an increasing number of microprocessor chips specifically designed to permit the construction of parallel computers varying in size from PC add-in boards with a few processors up to 64000-processor supercomputers. \medskip These machines are being successfully applied in a wide range of application areas especially in science and engineering. This is producing a substantial amount of practical experience in those problems which parallelize well and the features of hardware and systems software needed to use concurrency effectively. There are also new computational methods, such as cellular automata and massively parallel neural networks, which are particularly suited to concurrent execution. At present, there is no journal that brings this work together. Results, if published at all, are scattered throughout specialized technical journals. This journal focuses on practical experience with concurrent machines, especially: \item{$\bullet$}Concurrent solutions to specific problems \item{$\bullet$}Concurrent algorithms and computational methods \item{$\bullet$}Programming environments, operating systems and tools \item{$\bullet$}New languages \item{$\bullet$}Performance design, analysis, models and results \medskip The breadth of topics is illustrated by the following papers selected from recent issues: \medskip \noindent ``Experience with Multi-transputer Ada''\par {\it Judy M. Bishop, University of Pretoria, South Africa}\par {\it Ken S. Thomas, University of Southampton, United Kingdom} \medskip \noindent ``The Genesis Distributed Memory Benchmark --- I: Methodology and General Relativity Benchmark with Results for the SUPRENUM Computer''\par {\it C. Addison**, J. Allwright*, N. Binsted*, N. Bishop$\dag$, B. Carpenter*, P. Dalloz*, D. Gee*, V. Getov*,}\par {\it T. Hey*, R. Hockney*, M. Lemke$\ddag$, J. Merlin*, M. Pinches*, C. Scott*, and I. Wolton*}\par \vskip 3pt {\it *University of Southampton, United Kingdom; **Liverpool University, United Kingdom}\par {\it $\dag$University of the Witwatersrand, South Africa; $\ddag$Pallas GmbH, Germany} \medskip \noindent ``Parallelizing the Spectral Transform Method --- Part II''\par {\it David W. Walker, Patrick H. Worley, and John B. Drake}\par {\it Oak Ridge National Laboratory, United States} \medskip \noindent ``Parallel Language Developments in Europe: An Overview''\par {\it R. Perrott, The Queen's University, Northern Ireland} \medskip \noindent ``Allocating Data to Multicomputer Nodes for Physical Optimization Algorithms for Loosely Synchronous Computations''\par {\it Nashat Mansour and G. C. Fox}\par {\it Syracuse University, United States} \medskip \noindent ``Kernel-Kernel Communication in a Shared-Memory Multiprocessor''\par {\it E. M. Chaves, D. C. Das, T. J. LeBlanc, B. D. Marsh, and M. L. Scott}\par {\it University of Rochester, United States} \medskip \noindent ``Implementing Particle-in-Cell Plasma Simulation Code on the BBN TC2000''\par {\it Judy E. Sturtevant*, Phil M. Campbell*, and Arthur B. Maccabe**}\par {\it *Mission Research, Inc., United States}\par {\it **University of New Mexico, United States} \medskip \noindent ``Parallel Processing Applications for Data Analysis in the Social Sciences''\par {\it John Skvoretz, Shelley A. Smith, and Chuck Baldwin}\par {\it University of Southern Carolina} \medskip \noindent ``Parallel Computing in Aerospace Using Multi-Block Grids''\par {\it J. Hauser*, H. Wong*, W. Gentzsch**, H. G. Paap$\dag$}\par {\it *European Space Research and Technology Center, The Netherlands}\par {\it **FH Regensburg, Germany; $\dag$University of Bayreuth, Germany} \medskip \noindent ``Efficient Communication Primitives on Hypercubes''\par {\it Ching-Tien Ho, IBM Almaden Research Center, United States}\par {\it M. T. Raghunath, University of California at Berkeley, United States} \medskip \noindent ``Echidna, an Estelle-Compiler to Prototype Protocols on Distributed Computers''\par {\it C. Jard and J. Jezequel}\par {\it I.R.I.S.A. Campus de Beaulieu, France} \medskip \noindent ``Data Parallel Sorting for Particle Simulation''\par {\it Leonardo Dagum, NASA Ames Research Center, United States} \medskip \noindent ``Network Based Concurrent Computing on the PVM System''\par {\it G. A. Geist, Oak Ridge National Laboratory, United States}\par {\it V. S. Sunderam, Emory University, United States} \vskip 0.25in \noindent{\bf SUBSCRIPTION DETAILS} \noindent Volume 3 (1991)\ \ \ 6 issues\ \ \ \$270.00\par \noindent Volume 4 (1992)\ \ \ 6 issues\ \ \ \$295.00 \smallskip \noindent Bona fide personal subscribers are entitled to a 25\% discount on the full subscription price. \vskip 15pt \noindent{\bf Send now for a free sample copy---see Order Form overleaf} \vfill\eject \bye