The long-standing goal of computer aided design (CAD)/computer aided engineering (CAE) integration demands seamless interfaces between geometric design and engineering analysis/simulation tasks. The key challenge to this integration stems from the distinct and often incompatible roles geometric representations play, respectively, in design and analysis. This paper critically examines and compar...

An important goal of a computer aided instruction system is to provide students with understandable explanations . Generating explanations requires that the instructional system must itself have some understanding of the topic, prefereably close to the kind the student should have . There is a growing amount of evidence that human understanding of physical systems is based on qualitative models...