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Innocence enfantine : les enjeux du <i>Richard III</i> de Shakespeare
No full textInternational audienc
New insights into the first cervical vertebrae of Otavipithecus and Nacholapithecus
No full textInternational audienceFossil hominoids are crucial to understand the selection pressures that played a role in the emergence of modern hominoid positional behaviors. Here we investigate the morphology of the atlas of Otavipithecus namibiensis (GSN BA 104'91, Namibia) and Nacholapithecus kerioi (KNM-BG 35250BE, Kenya) for identifying potential positional-related signals and discussing functional and evolutionary implications. Published data from GSN BA 13'21, a second Otavipithecus atlas from Namibia, were integrated. For comparative material, 105 atlases of extant catarrhines and platyrrhines were included. In addition to standard linear measurements, the morphology of GSN BA 104'91 and KNM-BG 35250BE was investigated by landmark-based geometric morphometric (GM) method and statistical analyses. The dimensions of the Miocene specimens fall within, or closely approximate to, the range of variation of Pan and Hylobates. Our GM analyses indicate that GSN BA 104'91 is more similar to Pan. When the right lateral mass only is considered, GSN BA 104'91 and KNM-BG 35250BE show similarities with hominoids and cercopithecoids. Our results possibly support a positional repertoire in Otavipithecus that would have been partly similar with extant hominoids, and in particular with Pan (e.g., terrestrial quadrupedalism, climbing), and the presence of a mix of hominoid-like and cercopithecoid-like traits in the axial skeleton of Nacholapithecus
Fourquet-Courbet, M.-P. & Courbet, D. (2020). <i>Connectés et heureux ! Du stress digital au bien-être numérique</i>. Paris : Dunod
No full textRubrique : Note de lectureInternational audience[Référence : Fourquet-Courbet Marie-Pierre et Courbet Didier, Connectés et heureux : du stress digital au bien-être numérique, Malakoff : Dunod, 2020, 238 p., ISBN : 978-2-10-080704-8 (imprimé) ; 978-21-0080-930-1 (numérique).
Modeling conductive thermal transport in three-dimensional fibrous media with fiber-to-fiber contacts
No full textInternational audienceUnderstanding heat transfers in fibrous materials, particularly conduction, is a major challenge due to their heterogeneous and multiscale nature, and the unknown contribution of fiber-to-fiber contacts. In most previous modeling studies, the existence of thermal contact resistance is not considered, and the computational complexity limits the size of simulated samples, which often leads to imprecise or inaccurate predictions. The same problem arises when considering electrical conduction through fibrous materials. In this work, we describe a computationally efficient simulation approach based on a multinodal representation to analyze the steady-state heat conduction through the solid structure in numerically generated three-dimensional fibrous networks, including contact resistance. We show that the solid conductivity in these networks is governed by a master curve that depends on a single parameter: a characteristic ratio representing the interplay between the intrinsic fiber conductivity and contact resistance as well as the influence of other geometric parameters, which numerically validates previous theoretical studies. However, we observe a deviation to this established theory for poorly connected networks. We derive an expression for a correction factor, considering the influence of correlations between fiber temperatures, and we then find good agreement with our simulation data. Our results demonstrate that the solid conductivity can be fully predicted based on geometric quantities, regardless of the extent of network connectivity, thus generalizing previous studies on this topic. This work, contributing to improve our understanding of conductive heat transport in fibrous media, may prove useful in the development of accurate predictive models and optimization strategies for fibrous insulation materials
Acceptance Assessment of CACs in Educational Context
No full textThis report examines the opinions of the various stakeholders likely involved in a Context- Aware Classroom (CAC) regarding its acceptance and acceptability in an academic environment. This opinion is important because, if unfavorable, it will hinder its use. After reviewing the main models of technology acceptance and acceptability, we focus on CACs to examine a few studies, still rare, that focus on these parameters. We then detail 5 empirical studies on the acceptance of new educational technologies. Study 1 and 2 are about the acceptability of AI-based educational systems and generative AI systems, respectively. The other three studies are mostly devoted to CACs. Study 3 questions the values attached to the future use (acceptability) of CACs. Study 4 is about their acceptance, since participants actually had classes in CACs. Eventually, Study 5 explores the design and prototyping of CACs and learning analytics-based systems to monitor students’ engagement, implementing a UX design method: personas
Arc Blanc: A Real-Time Ocean Simulator
No full textInternational audienceThe oceans cover the vast majority of the Earth. Therefore, their simulation has many scientific, industrial and military interests, including computer graphics domain. By fully exploiting the multi-threading power of GPU and CPU, current state-of-the-art tools can achieve real-time ocean simulation, even if it is sometimes needed to reduce the physical realism for large scenes. Although most of the building blocks for implementing an ocean simulator are described in the literature, a clear explanation of how they interconnect is lacking. Hence, this paper proposes to bring all these components together, detailing all their interactions, in a comprehensive and fully described real-time framework that simulates the free ocean surface and the coupling between solids and fluid. This article also presents several improvements to enhance the physical realism of our model. The two main ones are: calculating the real-time velocity of ocean fluids at any depth; computing the input of the solid to fluid coupling algorithm
"Tout ce bruit en train de devenir une parole...". La germination de l’œuvre claudélienne et le moment critique de 1907
No full textInternational audienceAt the death of Jacques Rivière, Claudel payed tribute to the vocation of his first major critic: ensuring deep attention to the artistic creation. Indeed, Rivière's style of criticism was inseparable from his vocation as a publisher. He also brings together communities of readers, calling on them to exchange and deepen their emotions. The effects of Claudel's genius and Rivière's enthusiasm left their mark on a whole generation of his young artist friends.À la mort de Jacques Rivière, Claudel saluait la vocation de son premier critique d'importance : assurer une écoute essentielle de la création artistique en train de surgir. En effet, la critique de Rivière est indissociable de sa vocation d'éditeur. Il rassemble aussi des communautés de lecteurs qu'il appelle à l'échange, à l'approfondissement vécu de leurs émotions. Les effets du génie claudélien et de l'enthousiasme de Rivière marquent toute une génération de jeunes artistes de ses amis
Les causes de nullité des décisions sociales
No full textArticle publié dans le dossier L'ordonnance portant réforme des nullités en droit des sociétés : un texte de rupture ?, Colloque IRDA Paris du 3 avril 2025.International audienc
Combination of electrochemical and ultrasonic activations: a way to improve electroreforming of molecules from biomass
No full textInternational audienceBiomass-assisted water electrolysis is a technology that attracts more and more attention because it relies on a non-thermal conversion process and biomass is the most abundant contemporary source of carbon, and therefore the best renewable CO2-neutral substitute to fossil resources. Amongst molecules issued from biomass, glucose represents the most abundant one [1]. Moreover, the free energy of glucose electrooxidation into CO2 (eq. 1) leads to a electrochemical potential under standard conditions at 25 °C of -0.012 V vs SHE (standard hydrogen electrode), a significantly lower value than that of the standard water oxidation potential (+1.23 V vs SHE) [2]. This allows expecting low cell voltages for hydrogen production and makes the electro-oxidation of glucose at the anode with simultaneous generation of hydrogen at the cathode in electrosynthesis reactors a promising and efficient process for the co-production of hydrogen and bio-sourced value-added chemicals. C6H12O6 + 6 H2O → 6 CO2 + 24 H + 24 e- E° = -0.012 V vs SHE (1)Although thermodynamically favorable, the electrooxidation reaction of glucose is kinetically slow (complex multielectronic reaction). Ultrasounds (US) have already been used to improve the kinetics of electrochemical reactions [2,3]. In the present contribution, we aim at investigating the electrooxidation of 0.1 M of glucose (and possibly derivatives) in 0.1 mol L−1 NaOH on polycrystalline Pt and Ni surfaces under silent and ultrasonic conditions. The effect of US ranging from low to high frequency domains will be investigated. Linear sweep voltammograms and chronoamperograms (CA) will be recorded to compare activity (onset potential and current densities) and stability of the system. High-performance liquid chromatography will be used to analyze reaction products accumulated in the CA experiments and to determine the influence of US on selectivity
Amitiés, couples, sexualités : penser le continuum des intimités relationnelles
No full textDocument de travail n°305, Aubervilliers : Ined, 2025Ce document de travail propose un outillage méthodologique pour penser l'intimité en sciences sociales à partir d'une perspective historique. Les intimités sont caractérisées par trois composantes majeures : leur dimension relationnelle, le fait qu’il s’agisse de liens de proximité, et enfin le fait que ces liens prennent corps dans des configurations matérielles situées socialement et historiquement. Nous proposons de penser ensemble amitiés, couples et sexualités dans le continuum des intimités relationnelles pour mesurer ce que les porosités et les logiques transversales de ces liens