Optimal local laws and CLT for the circular Riesz gas

We study the long-range one-dimensional Riesz gas on the circle, a continuous system of particles interacting through a Riesz (i.e inverse power) kernel. We establish near-optimal rigidity estimates on gaps valid at any scale. Leveraging on these local laws and using a Stein method, we provide a quantitative Central Limit Theorem for linear statistics. The proof is based on a mean-field transport and on a fine analysis of the fluctuations of local error terms through the study of Helffer-Sj\"ostrand equations. The method can handle very singular test-functions, including characteristic functions of intervals, using a comparison principle for the Helffer-Sj\"ostrand equation

Méthode rationnelle de classement d\u27une bibliothèque

« Document numérisé pour l\u27ENSSIB » - Ce traité de Pierre Boursier vise au premier chef les collectionneurs et les amateurs de livres. L\u27auteur commence par un inventaire des classements adoptés par cette catégorie du lectorat. Après avoir exposé les défauts de chacun de ces modes de classement, il présente la méthode chronologique comme la plus adaptée pour ce type de bibliothèque. Sa méthode consiste à regrouper les livres par formats et à les classer en fonction de la date de naissance de leur auteur. Afin de faciliter les recherches, il recommande la constitution d\u27un catalogue sur fiches par auteurs classées chronologiquement mais aussi un système de rangement physique particulier. Il souligne les avantages de son système, mais évoque aussi les objections qui lui ont été faites à ce propos. Il conclut néanmoins sur la supériorité de sa méthode sur les autres. Son objectif reste d\u27en faire des adeptes. L\u27intérêt de ce document est principalement d\u27ordre historique et technique, permettant d\u27apprécier les différents modes de classement existants à l\u27époque en matière de bibliothèque privée

Enhancement of a new methodology based on the impulse excitation technique for the nondestructive determination of local material properties in composite laminates

A new approach for the nondestructive determination of the elastic properties of composite laminates is presented. The approach represents an improvement of a recently published experimental methodology based on the Impulse Excitation Technique, which allows nondestructively assessing local elastic properties of composite laminates by isolating a region of interest through a proper clamping system. Different measures of the first resonant frequency are obtained by rotating the clamping system with respect to the material orientation. Here, in order to increase the robustness of the inverse problem, which determines the elastic properties from the measured resonant frequencies, information related to the modal shape is retained by considering the effect of an additional concentrated mass on the first resonant frequency. According to the modal shape and the position of the mass, different values of the first resonant frequency are obtained. Here, two positions of the additional mass, i.e., two values of the resonant frequency in addition to the unloaded frequency value, are considered for each material orientation. A Rayleigh–Ritz formulation based on higher order theory is adopted to compute the first resonant frequency of the clamped plate with concentrated mass. The elastic properties are finally determined through an optimization problem that minimizes the discrepancy on the frequency reference values. The proposed approach is validated on several materials taken from the literature. Finally, advantages and possible limitations are discussed

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

Noninvasive Tests of Liver Fibrosis and Their Combination in NAFLD: From Selected Patients to Real-Life Populations

Nonalcoholic fatty liver disease (NAFLD) has become extremely common, now affecting 25% of the worldwide population. All physicians, regardless of their specialty, are seeing NAFLD patients in their daily clinical practice, and all are challenged by the identification of the small subgroup having an advanced form of the disease. As with the other causes of chronic liver disease, it is now well established that liver fibrosis is the main predictor of the prognosis in NAFLD, justifying the interest in diagnosing fibrosis. Because it is not conceivable to perform liver biopsy (currently the best reference, albeit imperfect, for liver fibrosis evaluation) in large populations, noninvasive testing represents an attractive option for the diagnosis and screening of NAFLD patients with advanced liver disease in need of specialized management. The noninvasive tests currently available are mainly represented by blood tests, either simple blood tests combining common indirect markers of liver fibrosis or specialized blood tests, including direct markers of liver fibrogenesis and fibrolysis, and elastography devices. This article is protected by copyright. All rights reserved

WHICH ARE THE EFFECTS OF BODY-OBJECTIFICATION AND INSTAGRAM-RELATED PRACTICES ON MALE BODY ESTEEM? A CROSS-SECTIONAL STUDY

Objective: According to the objectification framework, media pressure toward body models promotes the internalization of beauty ideals that negatively influence individuals’ body image and self-esteem. Historically, women have been the main target of sociocultural pressures. However, research has recently suggested that self-objectification is a male phenomenon as well, which can be inscribed in men’s body experiences. Nevertheless, fewer studies have specifically focused on the male experience and general consequences of body-objectification are yet to be extensively analyzed regarding males’ body image features. The current cross-sectional study explores the consequences of body-objectification on male body esteem, specifically testing the predictive role of exercising/dietary habits, body-objectification features, and SNS-related practices on male body esteem. Method: A total of 238 male participants (mean age = 24.28 years, SD = 4.32) have been involved in an online survey. Three hierarchical analyses were performed to test the influence of objectified body consciousness and social networking-related experiences (i.e. Instagram intensity use, photo manipulation, selfie feedback investment) on young men’s body esteem with specific reference to the weight, appearance, and attribution features of the Body Esteem Scale. Results: Findings highlighted that body shame played an interesting key role, influencing negatively all the body esteem dimensions, thus highlighting that attention needs to be deserved on this feature of OBC regarding males’ experience. On the contrary, appearance control-related dimensions positively influenced body esteem. Overall, findings confirmed that objectification theory can adequately mark a pathway by which media imagery is internalized also by men and may negatively affect their body esteem. Conclusions: Despite some limitations, this study may contribute to enlarging our knowledge on male body image and self-objectification experience and support literature shattering the stereotype that body dissatisfaction is a “female-exclusive” issue. Likewise, beyond some questioning positions, these findings also encourage further exploration of a healthier “control dimension”, including body appearance related activities and beliefs