Variations sur l’insignifiant génétique : les métaphores du (non-)code

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.

Usages prescrits ou annoncés, usages observés. Réflexions sur les usages scolaires du numérique par les enseignants

The use of ICT for Education is an extremely complex issue that can and should be analyzed from different perspectives. This article does not intend to cover all of them but, instead, try to address only some of them by developing a high level view showing the contradictions that characterize different official statements and stressing some educational paradoxes. The article describes the Frenc...