In this paper, we discuss the problem of how a free-floating space manipulator can be mapped to a conventional, fixed-base manipulator which preserves both its dynamic and kinematic properties. This manipulator is called dynamically equivalent manipulator (DEM). The DEM concept not only allows us to model a free-floating space manipulator system with simple, well-understood methods, but also ca...

©1999 No part of this book may be reproduced in any form by print, photoprint, microfilm or any other means without the prior written permission from the publisher. A publication in coöperation with the Dutch researchgroups SIMULATION and COMPLEX SOCIETAL PROBLEMS of the NOSMO (Dutch Research group on Methodology) Validation of simulation models in the social sciences Cor van Dijkum and Etzel v...

Discussions about simulation credibility tend to focus on the issue of "validation", i.e., how well simulation predictions match real world observations. While validation is certainly a most direct and intuitively accessible measure of simulation credibility, the validation process has numerous well-known limitations. Validation is by no means the only measure of simulation credibility, however...

In der Chirurgie spielte Training schon immer eine wichtige Rolle. Mit der Einführung minimal-invasiver Verfahren ist der Bedarf deutlich gestiegen. Neben dem Tiermodell konnte der Anwender bisher nur auf Boxoder virtuelle Trainer zurückgreifen. ELITE (endoskopisch-laparoskopische interdisziplinäre Trainingseinheit) ist ein neues voll-synthetisches ex-vivo Trainingsmodell, mit dem die unterschi...

ENVISAT/ ASAR interferometry is a useful tool for the retrieval of geoand bio-physical parameters. In this paper the aim is show the quality of interferometric ENVISAT/ ASAR products. This objective will be approached in two ways. First, the timing accuracy of various ENVISAT/ ASAR products is evaluated. The geometric calibration and validation includes the determination of slant-range and azim...

Why Read This Chapter? To help you decide how to check your simulation – both against its antecedent conceptual models (verification) and external standards such as data (validation) – and in this way help you to establish the credibility of your simulation. In order to do this the chapter will point out the nature of these processes, including the variety of ways in which people seek to achiev...