Energy transfer from baryons to dark matter as a unified solution to small-scale structure issues of the Λ\LambdaCDM model

Using a semianalytic code, we show how baryon physics in a $\Lambda$CDM cosmology could solve the discrepancy between numerical predictions of dark matter haloes and observations, ranging from dwarf galaxies to clusters, without the need of nonstandard dark matter models as advocated, for example, by [Kaplinghat et al., Phys. Rev. Lett. 116, 041302, (2016)]. Combining well established results, we show, for the first time, how accounting for baryon physics, in particular dynamical friction mechanisms, leads to flat galaxy-cluster profiles and correlations in several of their properties, solves the so-called `diversity problem' and reproduces very well the challenging, extremely low-rising rotation curve of IC2574. We therefore suggest treating baryonic physics properly before introducing new exotic features, albeit legitimate, in the standard cosmological model.Comment: 10 pages, 4 figures, matching the accepted version on Phys. Rev.

Des euros et des hommes : modélisation d'un lien complexe

International audienceSince almost one century, coins circulation is used by historians as indicator of people networking through time and space. The introduction of a single currency, the euro, in 12 European countries on January 1st, 2002 offers the possibility of redrawing the paths of international mobility. Matching the analysis of the monetary distributions to study European mobilities requires formalizing precisely the concept and the particular effect of the various factors determining the intensity, the diversity and the extent of the international circulations. A modelling of the internationalization according to those various indicators has been conducted from the observation of the contents of 20,000 purses in metropolitan France between June, 2002 and December, 2011. Results allow to connect certain characteristics of territories and individuals with particular motives for the European mobility.Depuis près d’un siècle, la circulation monétaire est utilisée par les historiens comme un indicateur de la mise en relation des hommes à travers le temps et l’espace. La mise en circulation d’une monnaie unique, l’euro, dans 12 pays européens au 1er janvier 2002 offre la possibilité de retracer les chemins de la mobilité internationale au sein de cet espace. Relier l’analyse des répartitions monétaires avec l’étude des vecteurs de la mobilité européenne nécessite de formaliser de façon précise ce concept au moyen d’indicateurs déterminant l’intensité, la diversité et la portée des relations internationales. Une modélisation de l’internationalisation selon ces différents indicateurs a été réalisée à partir de l’observation du contenu de plus de 20 000 porte-monnaie en France métropolitaine, entre juin 2002 et décembre 2011. Les résultats permettent de relier certaines caractéristiques des territoires et des individus à des motifs particuliers de la mobilité européenne

The circulation of euro coins as markers of European mobility in France

This study examines the social and territorial structure of the relations between Eurozone countries and residents that we grasp by studying the diffusion of foreign euro coins (2002-2011). As a euro coin is conveyed across space by persons, it offers a good representation of both social and spatial networks, as well as it allows the study of both social and territorial inequalities with regards to international connectiveness. We use a series of individual-level representative surveys describing the content of the money bag of an amount of 21,669 respondents and analyse internationalization differences using logistic regressions. The results show that students and executives are the social categories that are the most connected to neighbouring peoples and which are therefore potential vectors of a European identity. They also demonstrate strong spatial and territorial variations of the openness of places and people to the rest of Europe—everything else being equal.Cet article s’intéresse à la structure des relations sociales et territoriales qui se tissent en Europe à travers l’étude de la diffusion des pièces de monnaie étrangères en euro (2002-2011). Dans la mesure où les pièces de monnaie circulent à la faveur de l’échange entre personnes, leur répartition est un marqueur indirect de la mise en réseau des territoires et des hommes qui reflète bien les inégalités territoriales et sociales dans l’accès à la mobilité internationale. Nous présentons dans cet article une série d’études individuelles représentatives décrivant le contenu du porte-monnaie de 21 669 enquêtés et analysant les différences en terme d’internationalisation sur la base de régressions logistiques. Les résultats montrent que les étudiants et les cadres sont les catégories sociales les plus connectées aux populations étrangères voisines et qu’elles sont en conséquence des vecteurs potentiels d’une identité européenne. Ils montrent également de fortes variations spatiales et territoriales en termes d’ouverture au reste de l’Europe des personnes et des lieux – toutes choses étant égales par ailleurs

Unilateral isolated primary cutaneous amyloidosis of the external auditory canal

Isolated primary cutaneous amyloidosis (PCA) of the external ear is extremely rare. We describe the case of a 65-year-old woman presenting with itching within the left external auditory canal (EAC). Otoscopy revealed a 3 mm whitish lesion involving the cartilaginous portion of the left EAC. The lesion was excised. Histological and immunohistochemical features were consistent with keratinic amyloidosis. A clinical workup was negative for systemic amyloidosis. As far as we know, only nine cases of PCA exclusively involving the EAC have been reported. The frequent occurrence of itching in these patients and the keratinic nature of the amyloid support the role of chronic stimulation/irritation in the pathogenesis of isolated amyloidosis the EAC

L’artiste au Moyen Âge

Traditionnellement, l’œuvre d’art du Moyen Âge a été considérée comme le produit d’un créateur anonyme, nourri par la foi, d’un artisan humble qui révélait par ses œuvres les aspirations et les craintes de son milieu et de son époque. Mais depuis longtemps, les historiens de l’art se sont attachés à relier une partie de ces œuvres à des personnalités individuelles, sculpteurs, architectes ou peintres (enlumineurs, verriers,…), à des noms, qu’ils soient de convention (le Maitre de Cabestany) o..

A new method for the solution of the Schrodinger equation

We present a new method for the solution of the Schrodinger equation applicable to problems of non-perturbative nature. The method works by identifying three different scales in the problem, which then are treated independently: An asymptotic scale, which depends uniquely on the form of the potential at large distances; an intermediate scale, still characterized by an exponential decay of the wave function and, finally, a short distance scale, in which the wave function is sizable. The key feature of our method is the introduction of an arbitrary parameter in the last two scales, which is then used to optimize a perturbative expansion in a suitable parameter. We apply the method to the quantum anharmonic oscillator and find excellent results.Comment: 4 pages, 4 figures, RevTex

Bidirectional Psychoneuroimmune Interactions in the Early Postpartum Period Influence Risk of Postpartum Depression

More than 500,000 U.S. women develop postpartum depression (PPD) annually. Although psychosocial risks are known, the underlying biology remains unclear. Dysregulation of the immune inflammatory response and the hypothalamic–pituitary–adrenal (HPA) axis are associated with depression in other populations. While significant research on the contribution of these systems to the development of PPD has been conducted, results have been inconclusive. This is partly because few studies have focused on whether disruption in the bidirectional and dynamic interaction between the inflammatory response and the HPA axis together influence PPD. In this study, we tested the hypothesis that disruption in the inflammatory-HPA axis bidirectional relationship would increase the risk of PPD. Plasma pro- and anti-inflammatory cytokines were measured in women during the 3rd trimester of pregnancy and on Days 7 and 14, and Months 1, 2, 3, and 6 after childbirth. Saliva was collected 5 times the day preceding blood draws for determination of cortisol area under the curve (AUC) and depressive symptoms were measured using the Edinburgh Postpartum Depression Survey (EPDS). Of the 152 women who completed the EPDS, 18% were depressed according to EDPS criteria within the 6 months postpartum. Cortisol AUC was higher in symptomatic women on Day 14 (p = .017). To consider the combined effects of cytokines and cortisol on predicting symptoms of PPD, a multiple logistic regression model was developed that included predictors identified in bivariate analyses to have an effect on depressive symptoms. Results indicated that family history of depression, day 14 cortisol AUC, and the day 14 IL8/IL10 ratio were significant predictors of PPD symptoms. One unit increase each in the IL8/IL10 ratio and cortisol AUC resulted in 1.50 (p = 0.06) and 2.16 (p = 0.02) fold increases respectively in the development of PPD. Overall, this model correctly classified 84.2% of individuals in their respective groups. Findings suggest that variability in the complex interaction between the inflammatory response and the HPA axis influence the risk of PPD

R-chie: a web server and R package for visualizing RNA secondary structures

Visually examining RNA structures can greatly aid in understanding their potential functional roles and in evaluating the performance of structure prediction algorithms. As many functional roles of RNA structures can already be studied given the secondary structure of the RNA, various methods have been devised for visualizing RNA secondary structures. Most of these methods depict a given RNA secondary structure as a planar graph consisting of base-paired stems interconnected by roundish loops. In this article, we present an alternative method of depicting RNA secondary structure as arc diagrams. This is well suited for structures that are difficult or impossible to represent as planar stem-loop diagrams. Arc diagrams can intuitively display pseudo-knotted structures, as well as transient and alternative structural features. In addition, they facilitate the comparison of known and predicted RNA secondary structures. An added benefit is that structure information can be displayed in conjunction with a corresponding multiple sequence alignments, thereby highlighting structure and primary sequence conservation and variation. We have implemented the visualization algorithm as a web server R-chie as well as a corresponding R package called R4RNA, which allows users to run the software locally and across a range of common operating systems

Modeling quark-hadron duality for relativistic, confined fermions

We discuss a model for the study of quark-hadron duality in inclusive electron scattering based on solving the Dirac equation numerically for a scalar confining linear potential and a vector color Coulomb potential. We qualitatively reproduce the features of quark-hadron duality for all potentials considered, and discuss similarities and differences to previous models that simplified the situation by treating either the quarks or all particles as scalars. We discuss the scaling results for PWIA and FSI, and the approach to scaling using the analog of the Callan-Gross relation for y-scaling.Comment: 38 pages, 21 figure