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L'IRM cardiovasculaire, malgré son émergence récente, occupe une place de plus en plus importante en routine clinique. Elle se distingue des autres modalités d'imagerie par son innocuité, son excellente résolution spatiale, son bon contraste et par sa capacité d'imager ...

Membres du Jury: P.Labastie (LCAR Toulouse, France) :président B.Huber (Ciril,Caen,France) :rapporteur F.Martin (UAM, Madrid, Espagne) :Rapporteur M.Farizon (IPNL, Lyon, France) S.Martin (LASIM, Lyon, France) P.Moretto-Capelle (LCAR, Toulouse) :Dir. de thèse; A quantita...

The Spectral Clustering consists in creating, from the spectral elements of a Gaussian affinity matrix, a low-dimension space in which data are grouped into clusters. This unsupervised method is mainly based on Gaussian affinity measure, its parameter and its spectral e...

Obtenue avec la mention très honorable avec les félicitations du jury à l'unanimité; Based on a 4-year ethnography conducted in a GEM ("groupe d'entraide mutuelle", i.e. mutual help group) located in a major French city, this investigation focuses on the institutional a...

In this manuscript, we present a shape optimization method based on CAD parameters such as lengths, angles, etc. We rely on gradient-based optimization techniques. The sensitivity of the objective function, with respect to the mesh nodes position, is provided by an adjo...

Despite their remarkable success, the first widely spread versions of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 Wireless Local Area Network (WLAN) standard, IEEE 802. 11 a/b/g, featured low spectral efficiencies that are becoming insufficient t...

Hyperstreams are collections of streams with references. The hope is that structured data on a hyperstream can be monitored with lower latency than when communicated on a stream, since data on hyperstreams may be received in parallel rather than in a purely sequential m...

The human genome consists mainly of DNA, a macromolecule consisting of a long linear sequence of bases, tightly packed to fit in the relatively small nucleus. The packing gives rise to multiple hierarchical organizational levels. Recent research has shown that, along wi...

Faidherbia albida (Del.) A. Chev. (syn. Acacia albida, Del.) is a multipurpose tree of the legume family, widespread in Africa. Its strategy in the face of drought appears very original: it is present in semi-arid zones but its phenology is reversed in relation to the r...

This thesis is devoted to the unmixing issue in hyperspectral images, especiallyin presence of small sized objects. Hyperspectral images contains an importantamount of both spectral and spatial information. Each pixel of the image canbe assimilated to the reflection spe...