S’inscrivant dans le cadre des nouvelles recherches francaises en histoire sociale idees politiques, cet article propose de reconstruire la carriere du concept platonicien thymos l’histoire intellectuelle 20e et 21e siecles examinant sa circulation ses appropriations variees, ainsi que les differents contextes lesquels il a ete mobilise. Apres avoir restitue son emergence textes annees 1930 jeu...

Regularization is a common procedure when dealing with inverse problems. Because of the ill-posedness of many inverse problems, one needs to add some constraints as regularization to the problem in order to get a satisfactory solution. A difficulty when using multiple constraints is to properly choose a weighting parameter for each constraint. We propose here a vector field regularization metho...

Stochastic models are often economical to generate but problematic to render. Most previous algorithms rst generate a realization of the stochastic model and then render it. These algorithms become expensive when the realization of the stochastic model is complex, because a large number of primitives have to be rendered. In stochastic rendering we also model the intensity as a random eld, and t...

We present a general method to study the dissymmetry of anatomical structures such as the human brain. Our method relies on the estimate of 3D dissymmetry elds, the use of 3D vector eld operators, and T 2 statistics to compute signiicance maps. We also present a fully automated implementation of this method which relies mainly on the intensive use of a 3D non-rigid inter-patient matching tool. ...

With the rapid development in remote sensing, digital image processing becomes an important tool for quantitative and statistical analysis of remotely sensed images. These images contain most often complex natural scenes. Robust interpretation of such images requires the use of diierent sources of information about the scenes under consideration. This paper presents an integrated approach to th...

A common feature of organ-specific autoimmune disorders is a broad disease spectrum, which ranges from self-limited acute illnesses to relapsing or more chronic and fatal forms. The variation is less in disorders in which a threshold effect must be exceeded to result in symptoms, as in juvenile diabetes. However, a wide spectrum occurs in most autoimmune disorders, including uveitis, non-infect...

Résumé. Les modèles conditionnels du type modèles de Markov d’entropie maximale et champs de Markov conditionnels apportent des réponses aux lacunes des modèles de Markov cachés traditionnellement employés pour la classification et la segmentation de séquences. Ces modèles conditionnels ont été essentiellement utilisés jusqu’à présent dans des tâches d’extraction d’information ou d’étiquetage m...