On the basis of the linked-graph expansion theorem established by one of us, it is shown that the modified F model in a small electric field is related to a two-dimensional nearest-neighbor Ising model in an external magnetic field. Applying this relation to the critical isotherm we get ~5 = 7, and confirm the scaling relation. R~sum~ Sur la base du th6or~me de d6veloppement en graphes li6s 6ta...

RÉSUMÉ. Dans cet article, nous généralisons le flot de vecteurs gradients (GVF) pour les images à valeurs vectorielles. Nous basons notre méthode sur la définition d’un tenseur de structure multicomposante pondéré par une estimation aveugle du contraste, exploitant l’intégralité de l’information spatio-spectrale pour réduire la sensibilité au bruit et affiner les orientations du champ de forces...

County Council (ALF), the ChAMP Consortium, the Swedish Strategical Research Foundation (SSF), the V ardal Foundation, and Karolinska Institutet. Disclosure of potential conflict of interest: S. E. Dalhen has received grants from the Swedish Science Foundation, the Swedish Research Council, and the Swedish Heart-Lung Foundation; has a board membership with RSPR Pharma; and has consultant arrang...

GRAME est une institution musicale dont la vocation principale est le développement et le rayonnement de la création musicale contemporaine. Créé à Lyon en 1982, GRAME est en convention pluri-annuelle avec l’Etat, la Ville de Lyon et la région Rhône-Alpes, mais reçoit également le soutien de la SACEM, de la SPEDIDAM, du FCM, de l’Institut Français, de l’ANR, de l’Union européenne. GRAME a été l...

The German Satellite CHAMP (Challenging Minisatellite Payload) has the unique ability to measure the surface forces present. The total density can be easily derived from this measurement, with the help of models of solar radiation pressure and Earth’s albedo. This total density will be compared with the total density from two models, MSIS-86 (Hedin, 1987) and DTM-78 (Barlier et al., 1977). The ...

The new satellite missions CHAMP, GRACE and GOCE will provide significantly improved global gravity field information in terms of quality and spatial resolution. In order to quantify the quality of these gravity field models independently from the estimation procedure, new validation concepts are necessary using external information. Validation requires the processing of selected level 3 produc...

– We discuss the asymptotic behavior of weighted empirical processes of stationary linear random fields in Z with long-range dependence. It is shown that an appropriately standardized empirical process converges weakly in the uniform-topology to a degenerated process of the form fZ, where Z is a standard normal random variable and f is the marginal probability density of the underlying random f...