Nous abordons la gestion efficace de documents XML dans un réseau pair à pair structuré, basé sur une table de hachage distribuée. Nous présentons une approche permettant d’exploiter des vues matérialisées déployées indépendamment sur le DHT par les pairs. Ces vues sont utilisées pour répondre à des requêtes de motifs d’arbes XML. Nous proposons des algorithmes pour la maintenance distribuée de...

We investigate three-dimensional cylinder wakes of incompressible fully developed flows at Re = 300, resulting from control induced by tangential motions of the cylinder surface. The motion of the cylinder surface, in two dimensions, is optimized using evolution strategies, resulting in significant drag reduction and drastic modification of the wake as compared to the uncontrolled flow. The qua...

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This paper deals with the impact of fault prediction techniques on checkpointing strategies. We extend the classical analysis of Young in the presence of a fault prediction system, which is characterized by its recall and its precision, and which provides either exact or windowbased time predictions. We succeed in deriving the optimal value of the checkpointing period (thereby minimizing the wa...

This preprint appeared firstly in Russian in 1997. Some truncated versions of this preprint were published in English and French, here a fully translated version is presented. The translation in English was done by O. V. Feodoritova and V. Deledicque to whom I express my gratitude. Key-words: Godunov’s Scheme, hyperbolic systems of conservation laws. ∗ Sobolev Institute of Mathematics, Novosibi...

The authorship attribution problem can be viewed as a categorization problem. To determine the most effective features to discriminate between different writers (or categories), we have evaluated seven feature selection functions (e.g., pointwise mutual information, information gain, odds ratio, !, or correlation coefficient). We have also considered two selection functions proposed in the cont...

Résumé Cet article présente une stratégie de partitionnement déterministe pour paralléliser le parcours des espaces de recherche, dans le but de résoudre les problèmes de Programmation Par Contraintes (PPC). Ce travail est réalisé dans le cadre d’un projet industriel nommé PAJERO, dont le but est de proposer un solveur de PPC parallèle qui doit répondre toujours la même solution en utilisant le...

The Interactive Strategy Trainer for Active Reading and Thinking (iSTART) is an intelligent tutoring system that provides students with automated training on reading strategies. In particular, iSTART helps students integrate textual information into a coherent mental representation through self-explanation. The goal of the present study was to examine how text cohesion influences qualitatively ...

Le terme d'allergiti cree par VON PIRQUET en 1906 designe "l'etat d'un individu qui sensi­bilise a un substance, y reagit ulterieurement d'une facon anormale, c'est a dire exageree (Pasteur Vallery Ra dot).  On distingue schematiquement deux types d'allergie: L'hypersensibilie imme<liat de type humorale et l'hypersensibilite du type retarde ou cellulaire.  Si dans la. clinique, les lesions cu...