Synthesis and Optical Properties of Cu2CoSnS4 Colloidal Quantum Dots

Monodisperse quaternary chalcopyrite Cu2CoSnS4 colloidal quantum dots have been synthesized by acid peptization of a tailored Cu2CoSnS4 precursor displaying loosely packed, ultrafine primary crystallites. Well-defined peaks shifted to higher energy compared to the Cu2CoSnS4 bulk band gap value were observed on the UV-Vis absorption curve consistent with a quantum confinement behavior. First investigations by room temperature time resolved photoluminescence (TRPL) spectroscopy suggest that the photoluminescence emission does not arise from a donor–acceptor recombination.

Le rôle problématique d’éros dans le Timée de Platon

Parmi les difficultés bien connues du Timée compte celle touchant au rôle problématique d’éros dans la cosmologie que Platon met dans la bouche de Timée. Dans son exposé cosmologique, Timée rend compte de deux inflexions différentes d’éros – sexuelle et philosophique –, mais il n’explique pas comment ces deux inflexions sont censées coopérer pour rendre possible la vie la meilleure qui soit : la vie philosophique. Il se trouve que l’imprécision du « discours érotique » de Timée ainsi que son incapacité à rendre compte des conditions de possibilité de l’activité philosophique dans le cosmos qu’il dépeint font surgir la question de l’interprétation du dialogue dans son ensemble. Sans réaliser lui-même cette interprétation, notre article vise à lui en fournir l’éventuelle matière

Rising out of the ashes: Additive genetic variation for crown and collar resistance to Hymenoscyphus fraxineus in Fraxinus excelsior

Since the early 1990s, ash dieback due to the invasive ascomycete Hymenoscyphus fraxineus is threatening Fraxinus excelsior in most of its natural range. Previous studies reported significant levels of genetic variability in susceptibility in F. excelsior either in field or inoculation experiments. The present study was based on a field experiment planted in 1995, 15 years before onset of the disease. Crown and collar status were monitored on 777 trees from 23 open-pollinated progenies originating from three French provenances. Health status was modeled using a Bayesian approach where spatiotemporal effects were explicitly taken into account. Moderate narrow-sense heritability was found for crown dieback (h2 = 0.42). This study is first to show that resistance at the collar level is also heritable (h2 = 0.49 for collar lesions prevalence and h2 = 0.42 for their severity) and that there is significant genetic correlation (r = 0.40) between the severities of crown and collar symptoms. There was no evidence for differences between provenances. Family effects were detected, but computing individual breeding values showed that most of the genetic variation lies within families. In agreement with previous reports, early flushing correlates with healthier crown. Implications of these results in disease management and breeding are discussed

Etats généraux de la presse écrite - Livre vert

Les Etats généraux de la presse écrite, lancés par le président de la République le 2 octobre 2008, ont eu pour mission d\u27apporter des réponses aux difficultés économiques que rencontre la presse écrite, notamment face au développement de l\u27internet et des journaux gratuits. Coordonnées par le ministère de la culture et de la communication, les réunions thématiques des quatre pôles de réflexions, respectivement consacrés aux métiers du journalisme, au processus industriel de la presse, à l\u27impact d\u27internet et aux questions de société ont eu pour objectif d\u27établir un diagnostic complet. Plus de 150 professionnels y ont participé durant trois mois. A l\u27issue de 70 heures d\u27auditions et de débats, les chefs de pôles ont émis des propositions qui ont permis d\u27élaborer ce Livre vert présentant plus de 90 recommandations

Validation of a new 60 MeV proton beam-line for radiation hardness testing

A 60 MeV proton beam-line has been developed in Nice, France, in collaboration with the Centre National d'Etudes Spatiales (CNES). Experimental results are presented here to validate the beam-line for radiation hardness testing.Comment: RADECS conference 202

Low-Quality Housing Is Associated With Increased Risk of Malaria Infection: A National Population-Based Study From the Low Transmission Setting of Swaziland.

BackgroundLow-quality housing may confer risk of malaria infection, but evidence in low transmission settings is limited.MethodsTo examine the relationship between individual level housing quality and locally acquired infection in children and adults, a population-based cross-sectional analysis was performed using existing surveillance data from the low transmission setting of Swaziland. From 2012 to 2015, cases were identified through standard diagnostics in health facilities and by loop-mediated isothermal amplification in active surveillance, with uninfected subjects being household members and neighbors. Housing was visually assessed in a home visit and then classified as low, high, or medium quality, based on housing components being traditional, modern, or both, respectively.ResultsOverall, 11426 individuals were included in the study: 10960 uninfected and 466 infected (301 symptomatic and 165 asymptomatic). Six percent resided in low-quality houses, 26% in medium-quality houses, and 68% in high-quality houses. In adjusted models, low- and medium-quality construction was associated with increased risk of malaria compared with high-quality construction (adjusted odds ratio [AOR], 2.11 and 95% confidence interval [CI], 1.26-3.53 for low vs high; AOR, 1.56 and 95% CI, 1.15-2.11 for medium vs high). The relationship was independent of vector control, which also conferred a protective effect (AOR, 0.67; 95% CI, .50-.90) for sleeping under an insecticide-treated bed net or a sprayed structure compared with neither.ConclusionsOur study adds to the limited literature on housing quality and malaria risk from low transmission settings. Housing improvements may offer an attractive and sustainable additional strategy to support countries in malaria elimination

Apport des traçages à la connaissance du système karstique du Val d'Orléans. Historique et nouvelles avancées

Le Val d'Orléans, avec le petit cours d'eau qui donne son nom au département du Loiret, a de tout temps excité la curiosité et fait l'objet d'observations de plusieurs admirateurs du milieu naturel. Si l'étendue géographique du système karstique du Val d'Orléans est bien définie (du méandre de Guilly, près de Sully-sur-Loire à l'est, jusqu'à la confluence Loire-Loiret à l'ouest ; Fig. 1) ses limites hydrogéologiques précises, malgré de nombreux travaux menés, restent encore mal connues. Or, la délimitation du système est une étape essentielle et préalable à toute démarche visant à comprendre les altérations de la qualité de la ressource en eau pouvant résulter de la contribution d'eaux polluées à son alimentation et à assurer la protection de cette ressource