Nouvelles observations sur les fissures radiales du Douglas

Nouvelles donnees sur les chauves-souris fossiles de localites du Pleistocene moyen et superieur de France

New data on bat fossils from Middle and Upper Pleistocene localities of France * Nouvelles donnees sur les chauves-souris fossiles de localites du Pleistocene moyen et superieur de France Paloma Sevilla a , * , Jean Chaline b a DepartamenlO de PaleonlOlogta, Facultad de Ciencias Geologicas (UCM) e lnstituto de Geologta Economica (CSIC), C/Jose Antonio Novais 2, 28040 Madrid, Spain b UMR 5561 du...

Notes sur les Ixodidés du genre Hyalomma (Koch)

Les inscriptions du temps sur les cadrans solaires

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.