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Les cirques et leurs spectacles dans les Gaules : état de la question
No full textInternational audienc
Prevalence and factors associated with the adoption of heat-adaptive behaviors among residents of a French southern region
No full textInternational audienceHeatwaves are becoming more frequent and intense, making it essential to examine individual protective strategies against their negative health effects. We conducted a survey (N = 1,515) in summer 2022 to investigate the prevalence of eight heat-adaptive behaviors (HABs) and the factors associated with their adoption. The population implemented the eight HABs heterogeneously, with closing shutters, blinds, or curtains and going to a cooler or air-conditioned place being the most and least adopted HABs, respectively. Using the Protective Action Decision Model (PADM), we found that greater perceived efficacy and descriptive norms were associated with higher adoption of HABs, as measured by an adaptation index, while greater perceived barriers led to lower adaptation. Conversely, demographic characteristics and self-reported health did not seem to be important predictors of adaptation. Our disaggregated analysis indicated that sociodemographic variables, such as gender or income, and threat perception variables exerted a heterogeneous impact on the eight HABs. Our study identified key drivers of HAB adoption that could help health authorities shape their communication campaigns to improve the population's adaptation to heatwaves
Understory plant indicator values poorly perform at monitoring temporal changes in French forest soil chemical properties
No full textInternational audienceUnderstory plant communities are widely used to infer soil conditions through species indicator values (IVs), scores reflecting species’ ecological preferences for factors such as soil acidity, moisture, or nutrient levels. While their reliability to describe soil conditions along spatial gradients is well established, their ability to capture temporal changes in soil chemistry remains largely untested at both temporal and geographical scales. We combined 26 years of vegetation monitoring with two French national soil surveys (1993–1997; 2007–2012) across 102 permanent forest plots to assess the reliability of community soil indices (CSIs) as bioindicators of soil pH, carbon-to-nitrogen ratio (C/N), and extractable phosphorus. CSIs were computed by averaging species IVs for each plot and survey. Temporal dynamics of measured soil properties and CSIs were analyzed using mixed-effects models at the national scale, while local trends were estimated separately for each plot to directly compare measured and vegetation-inferred changes. CSIs showed strong spatial correlations with measured pH and C/N, but weaker relationships for phosphorus. In contrast, no significant coupling was found between temporal changes in CSIs and measured soil parameters, with frequent mismatches in both direction and magnitude at the plot level. Measured soil dynamics were mainly driven by initial edaphic conditions and stand age, whereas CSI dynamics responded primarily to canopy openness and anthropogenic disturbances such tree harvesting. These findings confirm the value of IVs for spatial bioindication but highlight their limited sensitivity for detecting long-term soil changes, especially where soil changes remain modest
Alternative Cholesky Decomposition and family of scale mixture of Normal distribution: A joint modeling approach
No full textInternational audienc
Octupole deformation in quasiparticle states of odd-mass and odd-odd nuclei
No full textInternational audienceAs a follow up of [Phys. Scr. 99 055305 (2024)], where we studied axial octupole shapes in two-quasiparticle states of even-even nuclei, we investigate this type of shapes in odd-mass and odd-odd well-deformed nuclei, using the Skyrme-Hartree-Fock-BCS approach with selfconsistent blocking and a constraint on the expectation value of the axial octupole moment operator. To interprete the pattern of the resulting deformation energy curve as a function of , we extend the perturbative mechanism of Ref. [1]. We deduce selection rules which can predict, from the single-particle spectra at , whether in a given multiquasiparticle state the deformation energy curve has a local minimum at a vanishing or a finite value of . The predictions of this perturbative mechanism are compared with actual Skyrme-Hartree-Fock-BCS calculations with a constraint on the expectation value . Overall we obtain a qualitative agreement and we show that quantitative predictions are limited by the role of pairing correlations and strong octupole coupling between quasi-degenerate members of a single-particle parity doublet
Tertiary EOR-like microfluidic experiments: influence of viscosity ratio on oil clusters mobilization
No full textInternational audienc
Changements développementaux de la reconnaissance des émotions à partir des mouvements biologiques humains chez les enfants présentant un trouble du développement intellectuel et leurs pairs au développement typique.
No full textInternational audienceIndividuals with intellectual developmental disorders (IDD) often experience difficulties in emotion recognition. Previous research has primarily investigated these difficulties through tasks involving emotional facial expressions. However, no study has yet explored emotion recognition through other modalities, such as dynamic bodily expressions. The current study aimed to investigate developmental changes in emotion recognition through human biological motion presented in point-light displays (HBM-PLD) in children with IDD. Forty-two children with IDD and 157 typically developing (TD) children aged between 4 and 18 years participated in tasks requiring the recognition of emotional HBM-PLD (joy, anger, fear, sadness, and neutral) presented on a screen. We relied on a matched-pair design with two comparison groups: 31 pairs of participants were matched by chronological age (CA-matching) and 36 pairs were matched by fluid intelligence score assessed with Raven’s 2 Progressive Matrices (CE-matching). Results showed that children with IDD performed significantly worse than their TD peers when matched by chronological age. However, when matching was based on cognitive efficiency, these differences were greatly reduced, bringing the performances of children with IDD closer to those of younger TD children with similar cognitive efficiency. Generalized additive modeling (GAM) demonstrated that these differences could be explained by chronological age (reflecting experience related to development) and fluid intelligence (reflecting reasoning abilities). These results, obtained for the first time using HBM-PLD, provide empirical support for the hypothesis that emotion recognition abilities in children with IDD may reflect a developmental delay. The discussion highlights important considerations for developing targeted interventions tailored to individuals with IDD
Bail commercial et procédures collectives
No full textInternational audienceDe l'actualité jurisprudentielle à l'expérimentation du tribunal des activités économique
Logarithmic density of rank ≥ 1 and rank ≥ 2 genus-2 Jacobians and applications tohyperelliptic curve cryptography
No full textIn this work we study quantitative existence results for genus-2 curves over Q whose Jacobians have Mordell-Weil rank at least 1 or 2, ordering the curves by the naive height of their integral Weierstrass models. We use geometric techniques to show that asymptotically the Jacobians of almost all integral models with two rational points at infinity have rank r ≥ 1. Since there are ≍ X 13 2 such models among the X 7 curves y 2 = f (x) of height ≤ X, this yields a lower bound of logarithmic density 13/14 for the subset of rank r ≥ 1. We further present a large explicit subfamily where Jacobians have ranks r ≥ 2, yielding an unconditional logarithmic density of at least 5/7. Independently, we give a construction of genus-2 curves with split Jacobian and rank 2, producing a subfamily of logarithmic density at least 2/21. Finally, we analyze quadratic and biquadratic twist families in the split-Jacobian setting, obtaining a positive density of rank-2 twists. These results have implications for Regev's quantum algorithm in hyperelliptic curve cryptography
Mathematical Modeling of Mucus Transport in the Bronchial Tree with Ventilation Effects
No full textMucociliary clearance plays a central role in respiratory defense by transporting mucus along the bronchial tree through the combined action of cilia, mucus secretion, and airflow. We propose a multiscale mathematical model of this process that explicitly couples ciliary-driven transport, mucus production, and ventilation effects. The model combines a one-dimensional variational formulation for mucus velocity within individual airways with a system of ordinary differential equations describing the evolution of mucus thickness across bronchial generations. Realistic airway geometry and breathing scenarios are incorporated. The analysis reveals stable equilibrium mucus distributions in the absence of ventilation and periodic regimes under physiological breathing. Numerical results quantify the impact of secretion, ciliary activity, and airflow, and highlight nonlinear feedbacks between mucus accumulation and airway resistance, with potential relevance for pathological conditions