Résumé. Le volume d’information contenu dans un entrepôt de données s’accroît sans cesse, augmentant de ce fait le temps d’exécution des requêtes décisionnelles. Pour y remédier, l’administrateur doit, durant la phase de conception physique de l’entrepôt, effectuer une sélection de structures d’optimisation (index, vues matérialisées ou fragmentation), puis assurer leur gestion et maintenance. ...

Résumé. Le choix des mesures d’intérêt (MI) afin d’évaluer les règles d’association est devenu une question importante pour le post-traitement des connaissance en ECD. Dans la littérature, de nombreux auteurs ont discuté et comparé les propriétés des MI afin d’améliorer le choix des meilleures mesures. Cependant, il s’avère que la qualité d’une règle est contextuelle : elle dépend à la fois de ...

This work presents an approach to circumvent one of the major problems with techniques to build and apply software quality estimation models, namely the use of precise metric thresholds values. We used a fuzzy logic based approach to investigate the stability of a reusable class library interface, using structural metrics as stability indicators. To evaluate this new approach, we conducted a st...

This paper briefly outlines observa.tions fi'om texts made with respect to rhetorical relations and communicative goals. Then it will be shown how these ol)servations have been encoded into knowledge resources which are part of an integrated architecture for the gelmration of multimedia output. Both communicative goals and rhetorical relations are virtual constructs surface signals hint at thei...

Recent work suggests that variation in online language production reflects the fact that speech is information-theoretically efficient for communication. We apply this idea to studying the offline, structural properties of language, asking whether lexical properties may similarly reflect communicative pressures. We present evidence for the Communicative Lexicon Hypothesis (CLH): human lexical s...

Gestures are an integral part of speaking. They allow expression of thoughts that are difficult to articulate. They promote fluency of speech. Can gestures also facilitate reasoning, problem solving, and other cognitive processes? In the present task, people assembled an object and then made a video explaining how to assemble, using speech and gesture or gesture alone. A control group merely re...

While intentions are at the center of communication theories such as Relevance Theory, and also of theories of action in general, the interaction between communicative and non-communicative intentions has not been much investigated within the relevance-theoretic framework. This paper discusses Bratman’s (1987) Theory of Planning, which recognizes the critical role of intentions in governing our...

We present a way to mix the lower control of agents with the high level specifications of their goals. This paper addresses various topics required to animate virtual humans in a distributed way such as combining primary actions into tasks, using verbal communication between virtual humans and directing them with high level orders. Our models have been tested into a multi-languages / multi-modu...