Recherche et enseignement supérieur: Les défis de la discipline économique

Séro-agglutination rapide et macroscopique pour la recherche d'anticorps de la Fièvre Q. chez les animaux

La dose tolérée et toxique de la saponine chez les chèvres et les moutons

Recherche d'informations dans la blogosphère : Défis et premières évaluations

This paper describes the main retrieval problems when facing with blogs. Using the classical tf idf vector-space model together with three probabilistic and one statistical language model, we evaluate them using a TREC test-collections composed of 100 topics. Using two performance measures, we show that ignoring a stemming approach results in a better performance than other indexing strategies ...

Recherche de la pertinence et de la nouveauté dans les textes

Information retrieval systems usually retrieve documents. Studies have been carried out in order to better answer users'needs and present systems that retrieve smaller chunks of texts. This paper presents an approach that aims at answering the TREC novelty track: retrieve relevant passages and detect what are the novel sentences among the relevant ones. We discuss the results we obtained on two...

Recherche de similarités dans les séquences d'ADN : modèles et algorithmes pour la conception de graines efficaces

Most commonly used similarity search methods in genomic sequences are heuristic ones.These are based upon text ltering that allows one to infer potential regions of similarity. Thisthesis proposes new lter de nitions to search for similarities in genomic sequences, and fastalgorithms to measure the e ciency of these lters.More precisely, we study the spaced seed model and propos...