This article relates to interactive systems evaluation under the angle of inspection methods and more particularly of the Cognitive Walkthrough (CW) method. The basic versions of Cognitive Walkthrough are described, and also its evolutions and various variants. A synthesis according to different points of view (conceptual, methodological and technological), is proposed as well as research persp...

The concept of convergence of sequences of points has been extended by several authors to convergence of sequences of sets. The three such extensions that we will consider in this paper are those of Kuratowski, Wijsman and Hausdorff. We shall define statistical convergence for sequences of sets and establish some basic theorems, thereby obtaining generalizations of the corresponding results for...

ABITRACT Structure From Motion has been studied by S. Ullman [1]. The basic result is that given three views of four noncoplanar points, the structure (!.he relative depth of these points) can be uniquely determined. The original algorithm was complicate to imp'tement. In this study, We augment the problem to include the unknown scales among these frames and a new computational algorithm which ...