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Constitutionnalité du lissage des variations des valeurs locatives en cas de changement d'affectation des locaux industriels
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Les policy venues de la méthanisation à l’échelle nationale. Des forums et arènes en compétition pour cadrer et instrumenter le secteur
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Des capteurs plasmo-photoniques pour la sécurité sanitaire des produits agricoles
No full textInternational audienceLa co-intégration de guides d’onde plasmonique et photonique sur une puce silicium suivant une configuration interférométrique à branche unique, dite bimodale permet d’atteindre une sensibilité inégalée lors de la détection de traces de molécules. Des puces fabriquées à bas coût et un prototype d’instrument complet démontrent leur capacité à détecter des contaminants d’intérêt pour le secteur agricole
Understanding dopaminergic dose reduction following STN-DBS: mediation analysis
No full textInternational audienceBackground Levodopa equivalent dopaminergic dose (LEDD) reduction after subthalamic nucleus deep brain stimulation (STN-DBS) in Parkinson’s disease varies widely. Identifying predictors may guide patient selection and programming. Our objectives were to identify predictors of LEDD reduction and to test whether motor improvement mediates this association. Methods Data from 144 patients treated by STN-DBS were analysed. Predictors of LEDD reduction were selected using the Boruta algorithm, a machine-learning method comparing variable importance to randomised features and then tested in a structural equation model for direct and motor-mediated effects. Results Mean LEDD reduction was 41.7% (±38.2%) and motor improvement was 48.6% (±26.7%) at 1 year. Among the four predictors identified by Boruta, lower baseline LEDD (β=0.39, p=0.001), greater axial impairment (β=−0.25, p=0.003) and higher total volume of tissue activated (β=−0.17, p=0.031) were directly associated with lower LEDD reduction, independent of motor improvement. Sensorimotor STN overlap was not directly linked to LEDD reduction but was positively associated with motor improvement (β=0.34, p=0.001), which showed a trend-level effect on LEDD reduction (β=0.16, p=0.065). The total effect of sensorimotor STN overlap on LEDD reduction was not significant. Discussion Dopaminergic dose reduction after STN-DBS is constrained by preoperative axial symptoms and stimulation spread, independently of motor improvement, while sensorimotor STN overlap improves motor symptoms but not dose reduction. Integrating motor phenotype with anatomical guidance may enhance medication management post DBS
Expériences fraternelles d’adolescents identifiés HPI
No full textInternational audienceObjectifs. Cet article souhaite contribuer à une meilleure compréhension desexpériences fraternelles d’adolescents identifiés à haut potentiel intellectuel (HPI) etinterroger les effets perçus de cette étiquette dans la fratrie. Ces expériences sont peuétudiées, les recherches sont parfois anciennes et, à notre connaissance, aucune n’aété conduite en France. Pourtant, ces relations sont centrales dans le développementsocial puisqu’elles permettent de faire l’apprentissage des rapports sociaux. Méthode.Cet article présente les résultats d’une étude qualitative menée auprès de 27adolescents HPI âgés de 10 à 15 ans, recrutés en France, via des entretiens semidirectifs,après l’obtention du consentement écrit des parents et des adolescents. Uneanalyse de contenu thématique assistée par le logiciel N’Vivo a été conduite, à partird’une grille inspirée des dimensions classiques des relations fraternelles (chaleur,opposition, identification). Résultats. Les expériences fraternelles apparaissentambivalentes, conjuguant chaleur (partage, entraide, proximité) et opposition (conflits,violences parfois ludiques, antagonisme), tout en restant globalement satisfaisantes.Des processus d’identification et de différenciation coexistent. L’étiquette de HPI n’estpas jugée déterminante ; des effets perçus sont surtout rapportés lorsque cettecaractéristique est partagée au sein de la fratrie. Discussion. Les résultats plaidentpour considérer le frère ou la soeur également identifié(e) HPI comme une ressourcerelationnelle et un appui de socialisation, sans surestimer le rôle de l’étiquette auregard des dynamiques fraternelles ordinaires. Conclusions. Les expériencesfraternelles d’adolescents identifiés HPI sont marquées par une ambivalencenormative et des enjeux identitaires, l’étiquette jouant un rôle secondaire sauflorsqu’elle fonde une norme partagée dans la fratrie
Born to be alive. Isotopic evidence of investment in the survival of immature individuals in the Neolithic period, ecological influences and the construction of social identities
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Toward unprivileged, portable and generic network topology discovery
No full textInternational audienceWith the increase in size and complexity of supercomputers, it has become crucial to match applications and communication libraries to the underlying network topology. This matching may allow minimizing the time spent in waiting for high-latency communication and limiting contention on the network. While MPI implementations rely mostly on software such as hwloc to retrieve information about nodes topology, no tool currently gathers network topology information in a generic and portable fashion.In this paper, we propose an algorithm inspired by the Steiner Spanner problem that exploits end-to-end latency measurements to reconstruct a network topology. Our solution reconstructs the topology graph from a matrix of measured communication times. This is achieved by iteratively adding nodes to the graph while trying to match the shortest path length in the graph to the communication times. The total weight and the number of edges in the graph are also minimized
Moderate-length lifted quantum Tanner codes
No full textWe introduce new families of quantum Tanner codes, a class of quantum codes that first appeared in the work of Leverrier and Zémor [LZ22]. These codes are built from two classical Tanner codes, for which the underlying graphs are extracted from coverings of 2D geometrical complexes, and the local linear codes are tensor-products of cyclic or double-circulant linear codes. The advantage of code lifting is that, for any lift of odd index t of an [[n, k, d]]-code, we can adapt the study of the transfer homomorphism arising in cellular homology to describe symmetries of its logical operators and to establish that its dimension is lower bounded by k, and its distance is upper bounded by t • d. Moreover, when the dimension of the lifted code is equal to k, its distance is lower bounded by d. These parameter bounds also apply to the previous methods of code lifting [Gue25]. Finally, We present several explicit families, and identify instances of moderate length quantum codes which are degenerate, have low check weight, and whose distance surpasses the square root of the code length. Among them, we report the existence of a [[96, 2, 12]]-code whose distance growth saturates our bound, and for which half of the checks are of weight 8 and the other half of weight 4
Social gaps, perceived inequality and protests
No full textInternational audienceLatent feelings of economic vulnerability and social stagnation may have catalyzed the unprecedented uprisings that shook Latin America and other parts of the world in 2018–2019. We document this process in the context of Chile, leveraging survey data on protest participation and its potential determinants. Specifically, we construct a “social gap” index, measuring the disconnect between objective and perceived social status. Our findings suggest that this status misperception predicts protest involvement beyond factors such as perceived living costs, the subjective value of public services, peer influence, redistributive views and political demands. Notably, the social gap operates independently of broader feelings of unfairness and anger toward inequalities in explaining protests
Revealing the role of functional binder PEDOT:PSSTFSI in cathode-electrolyte interphase formation on LiFe<sub>0.4</sub>Mn<sub>0.6</sub>PO<sub>4</sub> electrodes of Li-ion battery
No full textInternational audienceThe stability of the cathode–electrolyte interphase (CEI) plays a critical role in determining the long-term performance of Li-ion batteries, particularly under high-voltage operation. This work investigates CEI formation and evolution in LiFe0.4Mn0.6PO4 (LFMP) composite positive electrodes using PEDOT:PSSTFSI, a conductive polymer that replaces both carbon black and polyvinylidene fluoride (PVDF) binder in the electrode formulation. Electrochemical tests, XRD, and XPS confirm PEDOT:PSSTFSI's electrochemical stability up to 4.5 V vs. Li+/Li and non-reactivity towards the active material. Reversible redox activity is observed in XPS, but it does not affect long-term structural or electrochemical stability. XPS analysis of C 1s, O 1s, P 2p, and F 1s spectra across different charge states reveals that PEDOT:PSSTFSI promotes a thinner, more stable CEI without altering its composition compared to carbon-containing references. This reduced interfacial degradation corresponds with improved performance at higher voltages during extended cycling. The results underscore PEDOT:PSSTFSI's promise as a multifunctional binder offering conductivity, stability, and interfacial control for advanced Li-ion positive electrodes.</p