565 research outputs found
Parallel Computing on a PC Cluster
The tremendous advance in computer technology in the past decade has made it
possible to achieve the performance of a supercomputer on a very small budget.
We have built a multi-CPU cluster of Pentium PC capable of parallel
computations using the Message Passing Interface (MPI). We will discuss the
configuration, performance, and application of the cluster to our work in
physics.Comment: 3 pages, uses Latex and aipproc.cl
ベクトルプロセッサのための高性能メモリアーキテクチャに関する研究
Tohoku University小林 広明課
Fast Low Fidelity Microsimulation of Vehicle Traffic on Supercomputers
A set of very simple rules for driving behavior used to simulate roadway
traffic gives realistic results. Because of its simplicity, it is easy to
implement the model on supercomputers (vectorizing and parallel), where we have
achieved real time limits of more than 4~million~kilometers (or more than
53~million vehicle sec/sec). The model can be used for applications where both
high simulation speed and individual vehicle resolution are needed. We use the
model for extended statistical analysis to gain insight into traffic phenomena
near capacity, and we discuss that this model is a good candidate for network
routing applications. (Submitted to Transportation Research Board Meeting, Jan.
1994, Washington D.C.)Comment: 11 pages, latex, figs. available upon request, Cologne-WP 93.14
Creation of fully vectorized FORTRAN code for integrating the movement of dust grains in interplanetary environments
The main objective is to improve the performance of a specific FORTRAN computer code from the Planetary Sciences Division of NASA/Johnson Space Center when used on a modern vectorizing supercomputer. The code is used to calculate orbits of dust grains that separate from comets and asteroids. This code accounts for influences of the sun and 8 planets (neglecting Pluto), solar wind, and solar light pressure including Poynting-Robertson drag. Calculations allow one to study the motion of these particles as they are influenced by the Earth or one of the other planets. Some of these particles become trapped just beyond the Earth for long periods of time. These integer period resonances vary from 3 orbits of the Earth and 2 orbits of the particles to as high as 14 to 13
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