From A Modular Visualization Environment to an Environment for Computational Problem Solving Ken Brodlie and Helen Wright University of Leeds facilities co embed a simulation as a control. lable data source in the visualization process. Yet there is a feeling that this facility is only rarely exploited. Marshall et al. [7] note: "Steering is often stated as a goal in scientific visualization, bur actual integrated applications are rare:' A possible answer is that HVE's have only tackled part of the problem. Certainly they provide an environment for carrying out a single simulation, with simple steering after an event has taken place. But scientists need much more than this. Rarely is a simulation carried out in isolation - it is far more likely to be one of a series OFcomputational experiments that the scientist is carrying o u t The scientist needs help in managing the sequence of experiments: storing results, comparing outcomes from different parameter secdngs, and so on. This will require a data management facility - something lacking in all current MVEs. Indeed Globus [4] contends: "We see no solution to the problem of inadequate database facilities, it appears to be inherent in the data flow model"
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