Eléments pour une analyse critique des systèmes d'information géographique

Nous dressons dans cet article un panorama des projets de systèmes d'informations géographique (SIG), et nous les analysons de différents points de vue, notamment en fonction de leur orgine, de leur problématique, ou du mode de circulation des informations qu'ils sous-tendent. Cette analyse aboutit à une typologie des projets de SIG, et au-delà, elle permet de poser les bases d'un guide méthodologique des SIG, destiné aux entreprises, aux collectivités locales, ainsi qu'aux organismes de recherche confrontés à l'évaluation à priori ou à posteriori de projets de SIG. (Résumé d'auteur

Controlled attenuation parameter (CAP): a new device for fast evaluation of liver fat?

International audienc

Clinical interpretation of Fibroscan® results: a real challenge

International audienc

Spread spectrum for imaging techniques in radio interferometry

We consider the probe of astrophysical signals through radio interferometers with a small field of view and baselines with a non-negligible and constant component in the pointing direction. In this context, the visibilities measured essentially identify with a noisy and incomplete Fourier coverage of the product of the planar signals with a linear chirp modulation. In light of the recent theory of compressed sensing and in the perspective of defining the best possible imaging techniques for sparse signals, we analyse the related spread spectrum phenomenon and suggest its universality relative to the sparsity dictionary. Our results rely both on theoretical considerations related to the mutual coherence between the sparsity and sensing dictionaries and on numerical simulation

Childhood emotional abuse and problematic social networking sites use in a sample of Italian adolescents: The mediating role of deficiencies in self-other differentiation and uncertain reflective functioning.

Childhood emotional abuse (CEA) is associated with various negative mental health outcomes. This study aimed to investigate the association between CEA and problematic social networking site (SNS) use in a sample of Italian adolescents. Using structural equation modeling, the study examined whether the relationship between CEA and problematic SNS use was sequentially mediated by self-other differentiation and uncertain reflective functioning in 1308 Italian adolescents (628 males, age range 13-19 years). A history of CEA was positively associated with problematic SNS use. Furthermore, deficiencies in self-other differentiation and uncertain reflective functioning partially mediated the relationship between CEA and problematic SNS use. The present study provides additional insight into the psychological dynamics underpinning problematic SNS use among adolescents. The clinical implications of these findings are discussed