HAL Université de Savoie
Not a member yet
59053 research outputs found
Sort by
Pourquoi et comment construire l’action publique par la recherche ?
No full textInternational audienc
Impact of Encapsulation Processing Conditions on Degradation Mechanisms of Carbon-Based Perovskite Solar Cells
No full textInternational audienc
Sur la complexité des jugements métacognitifs de la mémoire : preuves de la confiance rétrospective, du sentiment de savoir et des adultes âgés
No full textInternational audienceDissociations in types of memory tasks emerge when comparing feeling-of-knowing (FOK) judgments, predictions of upcoming performance, and retrospective confidence. This pattern has been used to construct theories of metacognitive access to memory, particularly in memory-impaired groups. In particular, older adults’ metacognitive sensitivity appears to vary between episodic (impaired) and semantic (intact) memory. However, this could be explained by the limitations of metacognitive measures and/or memory differences. We aimed to test these dissociations of metacognition with aging by comparing metacognitive efficiency in episodic and semantic tasks using two types of judgment: retrospective confidence judgments (RCJs) and FOK judgments. Metacognitive efficiency was estimated in 240 participants aged 19–79 years using a hierarchical Bayesian framework. Results showed that metacognitive efficiency for RCJs declined with age in the semantic task, even though task performance increased with age, while metacognitive efficiency was stable in the episodic task. Surprisingly, metacognitive efficiency was very low (although significantly higher than zero) for both FOK tasks regardless of age compared to similar previous studies. We suggested this might be due to the online testing. These results point to metacognition being multifaceted and varying according to judgment, domains, and populations.Des dissociations dans les types de tâches de mémorisation apparaissent lorsque l'on compare les jugements de sentiment de connaissance (FOK), les prédictions de performance à venir et la confiance rétrospective. Ce modèle a été utilisé pour élaborer des théories sur l'accès métacognitif à la mémoire, en particulier chez les groupes avec des troubles de la mémoire. En particulier, la sensibilité métacognitive des personnes âgées semble varier entre la mémoire épisodique (altérée) et la mémoire sémantique (intacte). Cependant, cela pourrait s'expliquer par les limites des mesures métacognitives et/ou les différences de mémoire. Nous avons voulu tester ces dissociations de la métacognition avec le vieillissement en comparant l'efficacité métacognitive dans des tâches épisodiques et sémantiques en utilisant deux types de jugement : les jugements de confiance rétrospectifs (RCJs) et les jugements FOK. L'efficacité métacognitive a été estimée chez 240 participants âgés de 19 à 79 ans àen s'appuyant sur un cadre hiérarchique bayésien. Les résultats ont montré que l'efficacité métacognitive pour les RCJs diminuait avec l'âge dans la tâche sémantique, même si la performance de la tâche augmentait avec l'âge, alors que l'efficacité métacognitive était stable dans la tâche épisodique. De manière surprenante, l'efficacité métacognitive était très faible (bien que significativement supérieure à zéro) pour les deux tâches FOK, quel que soit l'âge, par rapport à des études antérieures similaires. Nous avons suggéré que cela pouvait être dû au test en ligne. Ces résultats montrent que la métacognition est à facettes multiples et varie en fonction du jugement, des domaines et des populations
Strain Mapping and Phase Evolution in Single Palladium Nanoparticles During Electrochemical Hydrogen Absorption
No full textInternational audienc
Grotte Chauvet-Pont-d'Arc. Demande de prélèvements CNPA. Autorisation triennale 2025-2027
No full textLibérer vraiment et durablement l’entreprise [Caroline Mattelin-Pierrard]
No full textThis article examines how the process of adopting or rejecting liberated company management practices is constructed; this process is often portrayed as long, difficult, and complex. To address this question, we use a qualitative study based on narratives (Dumez, 2016) from two cases of companies in the process of liberation. Our results show that it is important for the process to be doubly coherent in order to sustain the adoption of liberation practices. We first show that the process involves three bundles of practices. These communication, support, and empowerment bundles have content coherence, i.e., configurations of interdependent practices. We then observe temporal coherence in the adoption of management practices, i.e., the preferred timeline for sustaining liberation. Beyond this double coherence, our analysis shows that adapting the process to the idiosyncrasies of the organisation is still necessary.Xerfi Canal a reçu Caroline Mattelin-Pierrard, Institut de Recherche en Gestion et Economie (Irege), Université Savoie Mont Blanc, Annecy-le-Vieux, France, pour parler de l'entreprise libérée.Une interview menée par Jean-Philippe Denis
Search for heavy long-lived charged particles with large ionization energy loss in proton-proton collisions at = 13 TeV
No full textInternational audienceA search for heavy, long-lived, charged particles with large ionization energy loss within the silicon tracker of the CMS experiment is presented. A data set of proton-proton collisions at a center of mass energy at = 13 TeV, collected in 2017 and 2018 at the CERN LHC, corresponding to an integrated luminosity of 101 fb, is used in this analysis. Two different approaches for the search are taken. A new method exploits the independence of the silicon pixel and strips measurements, while the second method improves on previous techniques using ionization to determine a mass selection. No significant excess of events above the background expectation is observed. The results are interpreted in the context of the pair production of supersymmetric particles, namely gluinos, top squarks, and tau sleptons, and of the Drell-Yan pair production of fourth generation (τ′) leptons with an electric charge equal to or twice the absolute value of the electron charge (e). An interpretation of a Z’ boson decaying to two τ′ leptons with an electric charge equal to 2e is presented for the first time. The 95% confidence upper limits on the production cross section are extracted for each of these hypothetical particles.[graphic not available: see fulltext
Search for excited tau leptons in the final state in proton-proton collisions at = 13 TeV
No full textInternational audienceResults are presented for a test of the compositeness of the heaviest charged lepton, , using data collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC. The data were collected in 2016-2018 and correspond to an integrated luminosity of 138 fb. This analysis searches for tau lepton pair production in which one of the tau leptons is produced in an excited state and decays to a ground state tau lepton and a photon. The event selection consists of two isolated tau lepton decay candidates and a high-energy photon. The mass of the excited tau lepton is reconstructed using the missing transverse momentum in the event, assuming the momentum of the neutrinos from each tau lepton decay are aligned with the visible decay products. No excess of events above the standard model background prediction is observed. This null result is used to set lower bounds on the excited tau lepton mass. For a compositeness scale equal to the excited tau lepton mass, excited tau leptons with masses below 4700 GeV are excluded at 95% confidence level; for = 10 TeV this exclusion is set at 2800 GeV. This is the first experimental result covering this production and decay process in the excited tau mass range above 175 GeV
Combination and interpretation of differential Higgs boson production cross sections in proton-proton collisions at = 13 TeV
No full textInternational audiencePrecision measurements of Higgs boson differential production cross sections are a key tool to probe the properties of the Higgs boson and test the standard model. New physics can affect both Higgs boson production and decay, leading to deviations from the distributions that are expected in the standard model. In this paper, combined measurements of differential spectra in a fiducial region matching the experimental selections are performed, based on analyses of four Higgs boson decay channels (, ZZ, WW, and ) using proton-proton collision data recorded with the CMS detector at = 13 TeV, corresponding to an integrated luminosity of 138 fb. The differential measurements are extrapolated to the full phase space and combined to provide the differential spectra. A measurement of the total Higgs boson production cross section is also performed using the and ZZ decay channels, with a result of 53.4 (stat) (syst) pb, consistent with the standard model prediction of 55.6 2.5 pb. The fiducial measurements are used to compute limits on Higgs boson couplings using the -framework and the SM effective field theory
Climate Impacts on Lake Food‐Webs Are Mediated by Biological Invasions
No full textInternational audienceABSTRACT Climate change and biological invasions are among the most important drivers of biodiversity and ecosystem change. Despite major advances in understanding their ecological impacts, these drivers are often considered individually, overlooking their possible complex interrelationship. By applying structural equation modeling to an extensive nationwide dataset of 430 fish communities across 257 French lakes, we investigated how taxonomic, size, and trophic diversities are impacted by climate warming and exotic species occurrence. Our goal was to compare their relative signature or lasting impacts after these factors had taken effect and to determine whether climate warming and biological invasions mediate the current state of community diversities. Drawing on a set of interconnected hypotheses, we suggest that biological invasions could be an important indirect effect of climate warming. This aspect must be considered to fully grasp the overall effects of climate change, beyond just its direct thermal impacts. Our results support our hypothesis that climate warming negatively impacts size and trophic diversities. However, these effects are mostly mediated by the warming‐induced increase in exotic species richness, which, in turn, promotes total species richness. These results suggest that exotic species have a substantial role in determining the impact of climate change, obscuring the diversity patterns predicted by temperature alone. We conclude that the impacts of climate change cannot be understood without considering its mediated effects via biological invasions, underscoring the need to grasp their intertwined roles in predicting and managing ecological consequences