Redescription d’Acanthocheilus rotundatus(Ascaridoidea, Nematoda), parasite de requins (Pleurotremata, Selachii). Considérations sur les affinités du genreAcanthocheiluset conclusions taxonomiques

Interrogation de données multimédia fondée sur les connaissances du domaine

In this paper, we present a domain knowledge based approach to retrieve multimedia data described by using the MPEG-7 standard. This standard is used since it provides tools to represent, in the same description, the structural and semantic aspects of the multimedia content. However, due to its XML schema based definition, MPEG-7 lacks ability to describe implicit information and to integrate d...

Sur les sous-groupes nilpotents du groupe de Cremona

We describe the nilpotent subgroups of the group Bir(P(C)) of birational transformations of the complex projective plane. Let N be a nilpotent subgroup of class k > 1; then either each element of N has finite order, or N is virtually metabelian.

Etat actuel de nos connaissances sur les argasidés de l'Iran

Notes sur les Ixodidés du genre Hyalomma (Koch)

Considérations sur l'évaluation de la robustesse en recherche d'information

This paper describes and evaluates vector-space, probabilistic and language IR models used to retrieve news articles from a corpus written in the French language. Based on three CLEF test-collections and 151 topics, we analyze the retrieval effectiveness of these approaches and analyze the poor retrieval results of hard topics. An appropriate robust evaluation is not easy because both the mean ...