HAL Portal UDL Université de Lyon
Not a member yet
327890 research outputs found
Sort by
"'Canta sola a Lisi y la amorosa pasión de su amante’: claves y contextos"
No full textInternational audienc
La justice sociale à l’horizon d’une morale sans Dieu : les mutations du sacré chez Ferdinand Buisson
No full textInternational audienceAccording to Ferdinand Buisson (1841-1932), the process of secularizing the school and then the State – of which he was a major player in both cases – had a meaning that was not limited to a separation of religion and politics. The point here is to argue that, as Buisson saw it, this dual process was part of a more ambitious perspective, that of a radical transformation of the sacred: from the religious to the political, from a dogmatic truth to an ideal of justice, from Christianity to socialism. Buisson's vision of the religious and sacred no longer takes the form of a superior divine power imposing itself on mankind, but rather as a drive by mankind itself towards its own moral fulfillment, which at the beginning of the 20th century presupposed a social, economic and political purpose, a purpose to which the secular educational institution could contribute.Selon Ferdinand Buisson (1841-1932), le processus de laïcisation de l’école puis celui de l’État – dont il est dans les deux cas un acteur majeur – recouvre une signification qui ne s’épuise pas dans une séparation du religieux et du politique. Il s’agira ici de soutenir que, tel que Buisson le conçoit, ce double processus s’inscrit dans une perspective plus ambitieuse, celle d’une mutation radicale du sacré : du religieux au politique, d’une vérité dogmatique à un idéal de justice, du christianisme au socialisme. Si le religieux et le sacré sont présents chez Buisson, ils ne se conçoivent plus sous l’espèce d’une puissance divine supérieure s’imposant à l’humanité mais comme un élan de l’humanité elle-même vers son propre accomplissement moral, lequel suppose selon lui une visée sociale, économique et politique, à la réalisation de laquelle l’institution scolaire laïque est susceptible de contribuer
Efficacy of transcranial direct current stimulation for depression: individual patient data meta-analysis
No full textInternational audienceBackground Transcranial direct current stimulation (tDCS) shows promise for treating depression, but heterogeneous findings from randomised controlled trials (RCTs) – likely due to patient characteristics and methodological differences – limit clear conclusions about its efficacy. Aims This individual patient data meta-analysis (IPD-MA) aims to evaluate the efficacy of tDCS for depression and explore moderators of clinical depression improvement. Method Databases (PubMed, Embase, Web of Science, Cochrane Library) were searched up to 1 February 2025 for RCTs comparing active versus sham tDCS in acute depressive episodes. The outcomes were Hedges’ g for continuous measures of depressive symptoms, odds ratio for response and remission rates and analyses of individual/methodological moderators of clinical improvement. Acceptability was assessed via dropout rates. Heterogeneity was quantified using the I ² statistic. Publication and risk of bias were evaluated with Egger’s test and Cochrane Risk of Bias Tool, respectively. Results Of 29 eligible RCTs, 18 data-sets provided IPD, totalling 1246 included in the IPD-MA (651 active, 595 sham; mean age 43.2, 63.4% female). Most studies (90%) had low risk of bias. Active tDCS showed small but statistically significant effects on depression improvement (Hedges’ d = 0.24, 95% CI = 0.11–0.35) and response rates (odds ratio 1.33, 95% CI = 1.04–1.72), with low-to-moderate heterogeneity. No significant difference in remission rates (odds ratio 1.30, 95% CI = 0.98–1.74) and dropout rates (12.7% active, 11.3% sham) were observed between groups. Only sample size significantly moderated clinical improvement, with larger trials showing smaller between-group differences. Conclusions In this IPD data-set, tDCS showed modest efficacy for depression. Future research should clarify its mechanisms, considering non-specific placebo effects
On the Application of <sup>238</sup>U, <sup>235</sup>U, and <sup>232</sup>Th Decay Series Disequilibria to Understanding the Processes and Timescales of Oceanic Basalt Petrogenesis
No full textInternational audienceUnderstanding how processes of magma genesis and magma differentiation control and modify the chemical composition of erupted lavas from the geochemical measurements of the latter is an under-constrained inverse problem, as there is only one known parameter—the measured composition of the erupted lava—but two unknown parameters—the chemical composition and lithology of the source before melting and how melting, crystallization, and melt–rock interactions act to alter the lava en route to the surface. In this invited contribution, we review nearly seven decades of scientific research that demonstrate the potential of U and Th decay series measurements for unraveling the complexities of oceanic magmatism. We review the underlying nuclear theory, geochemical principles, and application of the 238U, 235U, and 232Th decay series for (i) defining the timescales of magma genesis during decompression mantle melting, (ii) establishing the timescales of magma recharge and magma degassing, and (iii) determining the eruption ages of oceanic Quaternary volcanism
Tiques et santé. Biologie, maladies, maîtrise du risque
No full textInternational audienceFace aux déséquilibres écologiques et au risque croissant d’épidémies liés au changement global, il est légitime de s’interroger sur le rôle des tiques, connues pour transmettre de nombreux agents pathogènes à l’homme et l’animal. Elles peuvent être à l’origine d’un certain nombre de maladies, comme la maladie de Lyme.Cet ouvrage présente en premier lieu des éléments de base sur la biologie et l’écologie de ces parasites : quels sont leurs habitats, leurs hôtes préférés ? Comment localisent-ils ces hôtes et comment se reproduisent-ils ? Quels agents pathogènes transmettent-ils ? Sommes-nous égaux face au risque de piqûre ? Quelles sont les zones les plus infestées ? Les composantes du risque lié aux tiques et les moyens de connaître et suivre ce risque sont ensuite détaillés. Des stratégies sont proposées, qu’il s’agisse d’actions individuelles (adaptation des comportements, recours éventuel à la vaccination) ou collectives (meilleure gestion des zones de contact entre espaces naturels et zones habitées).Ce livre s’adresse à toute personne pratiquant des activités de plein air, ainsi qu’aux étudiants et enseignants. Il invite, sans alarmisme, à une approche basée sur la vigilance
The Generation Phases of Flow Matching: a Denoising Perspective
No full textFlow matching has achieved remarkable success, yet the factors influencing the quality of its generation process remain poorly understood. In this work, we adopt a denoising perspective and design a framework to empirically probe the generation process. Laying down the formal connections between flow matching models and denoisers, we provide a common ground to compare their performances on generation and denoising. This enables the design of principled and controlled perturbations to influence sample generation: noise and drift. This leads to new insights on the distinct dynamical phases of the generative process, enabling us to precisely characterize at which stage of the generative process denoisers succeed or fail and why this matters
Contrats internationaux de recherche-développement - Transferts internationaux de brevets, d'inventions non brevetées et de logiciels.
No full textÉduquer l'attention des élèves grâce au programme ATOLE : évaluations et présentation du projet EvATOLE
No full textCe manuscrit présente le programme ATOLE (Apprendre à être attentif, à l’école) et les résultats de deux dispositifs d’évaluation visant à étudier son impact sur l’attention des élèves. ATOLE est un programme d’éducation de l’attention fondé sur des résultats établis en neurosciences cognitives et en sciences de l’éducation, visant à développer chez les élèves une meilleure compréhension et régulation de leur attention dans le contexte ordinaire de la classe.Une première étude conduite en 2016–2017 a évalué les effets d’ATOLE sur la stabilité attentionnelle d’élèves du primaire et du collège à l’aide d’un test informatisé bref (BLAST). Les résultats montrent des améliorations significatives de la stabilité attentionnelle dans plusieurs classes ATOLE, absentes dans les classes contrôle, bien que les analyses globales ajustées indiquent des effets hétérogènes et dépendants du niveau initial des élèves.Ces résultats ont conduit au projet EvATOLE, une évaluation à plus grande échelle intégrant des outils plus écologiques, des mesures quantitatives et qualitatives, et un accompagnement pédagogique structuré. Les données suggèrent des effets positifs du programme sur la régulation attentionnelle, la métacognition des élèves et certaines pratiques enseignantes. L’ensemble de ces travaux souligne l’intérêt d’une éducation explicite de l’attention, tout en mettant en évidence l’importance du temps long et du contexte pédagogique pour en maximiser les effets
Systematic home visit planning prior to hospital discharge: a propensity-score matched comparative cohort study of over one million mother-infant dyads with one-year follow-up
No full textInternational audienceProblemMaternal mental health problems are leading causes of morbidity and mortality in high-income countries, yet follow-up after birth remains inconsistent.BackgroundSystematic postnatal home visits are recommended but many women do not receive them. clinical and economic impact of a structured scheduling of visits before discharge has not been fully evaluated.AimTo determine whether systematically arranged postpartum home visits were associated with reduced maternal rehospitalisations for mental health conditions. Secondary objectives included maternal and infant outcomes and healthcare costs within the first year.MethodsWe conducted a matched cohort study using national administrative data from 1297,646 low risk mother-infant dyads. In the intervention group, a midwife home visit was scheduled before discharge. Controls were matched on demographic and obstetric variables. The main outcome was maternal rehospitalisation for mental health conditions (ICD-10 codes F30–F45, F48, including depression or anxiety) within one year postpartum, excluding psychoses (F20–F29). Secondary outcomes included all-cause rehospitalisation for mothers and/or infants, use of emergency services, mortality, and overall healthcare costs.FindingsA scheduled home visit occurred in 95 % of cases in the intervention group, compared to 52 % in controls (p < 0.0001). The intervention was associated with fewer maternal mental health-related rehospitalisations (RR=0.82, p < 0.0001) and slightly reduced overall rehospitalisation rates for mothers and infants. Mortality was unchanged. Mean healthcare costs were marginally lower in the intervention group.DiscussionSystematic discharge planning may improve continuity of care and reduce psychiatric morbidity.ConclusionsPostpartum home visit scheduling supports better outcomes and may offer modest economic benefits
Gaussian Mixture Model with unknown diagonal covariances via continuous sparse regularization
No full textThis paper addresses the statistical estimation of Gaussian Mixture Models (GMMs) with unknown diagonal covariances from independent and identically distributed samples. We employ the Beurling-LASSO (BLASSO), a convex optimization framework that promotes sparsity in the space of measures, to simultaneously estimate the number of components and their parameters. Our main contribution extends the BLASSO methodology to multivariate GMMs with component-specific unknown diagonal covariance matrices. This setting is significantly more flexible than previous approaches, which required known and identical covariances. We establish non-asymptotic recovery guarantees with nearly parametric convergence rates for component means, diagonal covariances, and weights, as well as for density prediction. A key theoretical contribution is the identification of an explicit separation condition on mixture components that enables the construction of non-degenerate dual certificates—essential tools for establishing statistical guarantees for the BLASSO. Our analysis leverages the Fisher-Rao geometry of the statistical model and introduces a novel semi-distance adapted to our framework, providing new insights into the interplay between component separation, parameter space geometry, and achievable statistical recovery