Problématiques de genre et représentations de soi

Représentations et régularisations pour la classification de sentiments

As web 2.0 is spreading, users get used to give their opinion on forums, blogs and e-commerce websites. This is a valuable piece of information for many applications such as consumer modeling, sales prediction or opinion survey. According to the literature, the efficiency of opinion mining tools will mainly relies on the ability of discriminating texts that express positive sentiments from text...

Enjeux et problématiques de conception d'un jeu sérieux pour la prise de décision

This paper introduces design principles of serious games which goal is to understand the player/learner decision process. The analytical dimension is the core of gameplay questions: what are the mechanics able to make the player aware of his behavior as a decision-maker? This research questions the video game as a tool to develop the reflexivity and put in perspective the decision-making of the...

Apprentissage de représentations de documents et leur exploitation en recherche d'information

In order to perform the document-query similarity, many information retrieval (IR) models represent documents and queries as sets of weighted key words, called « bag of words », or a bag of concepts derived from a linguistic ontology, or constructed automatically by LSI or LDA techniques, to fill the gap between the query vocabulary and the one used in the document. Recent approaches propose to...

Description de Hyalomma dromedarii (Koch 1844) Morphologie de la larve et de la nymphe

Espaces de représentations complètement réductibles

We study some geometric properties of actions on nonpositively curved spaces related to complete reducibility and semisimplicity, focusing on representations of a finitely generated group Γ in the group G of rational points of a reductive group over a local field, acting on the associated space (symmetric space or affine building). We prove that the space of completely reducible classes is the ...