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Display Hardware The PowerWall's display is a single 6 foot by 8 foot screen illuminated from the rear by a 2 by 2 matrix of Electrohome video projectors. These projectors are driven by 4 RealityEngine2 graphics engines. The Ciprico disk arrays supply the RealityEngines with more than 300 MegaBytes per second of data in order to display smooth motion animation across the entire viewing area. The PowerWall does not consist solely of a high resolution display system; it is in itself a supercomputing system. In the configuration set up at Supercomputing '94, the PowerWall is an integrated visualization system connected by a HiPPI network to the POWER CHALLENGEarray distributed parallel processing system which includes large and extremely fast disk storage systems for raw or image data and many powerful Silicon Graphics MIPS R8000 processors.

third - index of third place neuron (if there are more than two output neurons). Must be a normalized float or DP vector or the same size as the training patterns used to train the weights. It could be used to classify any type of data, if the data could be input as a normalized vector. If necessary, resample the spectra to the same dispersion (eg. Extract the same wavelength region from all spectra.

The main challenge lies in visually representing the mental models users apply in attempting to understand performance information. It is challenging to relate performance information back to the abstractions that the user understands, particularly when a performance view that appeals to one person's mental model may have little in common with models held by others. The solution is that the visualization techniques and methods used to construct graphic displays of the data must be closely integrated with the models of parallel computation the data represent. In the following section, we discuss a paralel performance visualization model and an underlying theory for applying visualization principles. We then discuss visualization principles and scenarios.

No part of this book may be reproduced in any form by any electronic or mechanical means (including photocopying, recording, or information storage and retrieval) without permission in writing from the publisher. This book was set in by the authors and was printed and bound in the United States of America. Library of Congress Cataloging-in-Publication Data This book is also available in postscript and html forms over the Internet. (Xnetlib is an X-window interface to the netlib software based on a client-server model. Send snail mail orders to The MIT Press Book Order Department 55 Hayward Street Cambridge, MA 02142.

A site I really like: http://www.scca.org.mk

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