15 Result(s)
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Chapter and Conference Paper
Virtual Reality and Desktop as a Combined Interaction-Visualisation Medium for a Problem-Solving Environment
The paper addresses the problem of how to make a human-machine interaction user-friendlier within a problem-solving environment. Two different projection modalities — virtual reality and desktop solution — are...
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Chapter and Conference Paper
Lattice Boltzmann, a Robust and Accurate Solver for Interactive Computational Hemodynamics
Surgical planning as a treatment for vascular diseases requires fast blood flow simulations that are efficient in handling changing geometry. It is, for example, necessary to try different paths of a planned b...
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Chapter and Conference Paper
ISS-Studio: A Prototype for a User-Friendly Tool for Designing Interactive Experiments in Problem Solving Environments
In Problem Solving Environments (PSE), Interactive Simulation Systems (ISS) are an important interactive mode for studying complex scientific problems. But efficient and user-friendly tools for designing inter...
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Chapter and Conference Paper
Experiments with Migration of Message-Passing Tasks
The combined computing capacity of the workstations that are present in many organisations nowadays is often under-utilised, as the performance for parallel programs is unpredictable. Load balancing through dy...
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Chapter and Conference Paper
Performance Analysis of Parallel N-Body Codes
N-body codes are routinely exploited for simulation studies of physical systems, e.g. in the fields of Computational Astrophysics and Molecular Dynamics. Typically, they require only a moderate amount of run-ti.....
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Chapter and Conference Paper
Simulating Job Scheduling for Clusters of Workstations
In this paper we study hierarchical job scheduling strategies for clusters of workstations. Our approach uses two-level scheduling: global scheduling and local scheduling. The local scheduler refines the sched...
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Chapter and Conference Paper
Performance Measurements on Dynamite/DPVM
The total computing capacity of workstations can be harnessed more efficiently by using a dynamic task allocation system. The Esprit project Dynamite provides such an automated load balancing system, through t...
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Chapter and Conference Paper
Preserving locality for optimal parallelism in task allocation
Genetic Algorithms have been applied to several combinatorial optimisation problems, including the well known task allocation problem, originating from parallel computing. We introduce random task graphs as a ...
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Chapter and Conference Paper
High performance simulation for resonant-mass gravitational radiation antennas
In this paper the design and validation of a high performance simulation is discussed that is of critical value to the feasibility study of the GRAIL project, the aim of which is to build a gravitational radia...
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Chapter and Conference Paper
Breaking the curse of dynamics by task migration: Pilot experiments in the polder metacomputer
With the advent of high speed networks, distributed cluster computing and metacomputing have assumed an enormous interest. However, software methods and techniques to make the full potential of these distribut...
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Chapter and Conference Paper
Load balancing by redundant decomposition and map**
In this paper a methodology is presented that has been developed in the CAMAS3 project for the purpose of decomposition and map** of parallel processes to processor topologies. The methodology has been implemen...
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Chapter and Conference Paper
Simulating light scattering from micron-sized particles
Employing the combination of a kernel with low computational complexity, implemented on powerful HPC systems, we are now able to push the limits of simulation of light scattering from arbitrary particles towar...
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Chapter and Conference Paper
Constrained migration of an atmospheric circulation model
In the migration of large production codes from sequential to parallel implementations a total rewriting of the original code is often prohibited. The reason for this is that very complicated codes took years ...
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Chapter and Conference Paper
A comparison of the Iserver-Occam, parix, express, and PVM programming environments on a Parsytec GCel
We compare the Iserver-Occam, Parix, PVM, and Express parallel programming environments on a Parsytec GCel with 512 T805 transputers. The comparison will be made by a detailed analysis of the performance of on...
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Chapter and Conference Paper
Simulated Annealing for N-body systems
In this paper we discuss the map** of the physical problem of 2D crystallization with spherical boundary conditions onto a Simulated Annealing model, and the map** of this model onto a parallel computer. W...
