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Compte bancaire de l'enfant : la banque doit rechercher le double accord parental pour tout retrait ou virement (commentaire de l'arrêt Cass., com. 12 juin 2025, n° 24-13.604)
No full textInternational audienc
Les « doubles suivis » comme situations frontières [synthèse du rapport de recherche]: Pratiques professionnelles et différenciations sociales des jeunes suivis par l'ASE et la PJJ
No full textAvec Machiavel, penser la liberté politique dans un monde en guerre
No full textNotre démocratie est en crise, comment la réinventer ? Que nous enseignent ceux qui, au cours des âges, furent ses concepteurs ? Troisième volet de notre série consacrée aux philosophes et à la démocratie avec Nicolas Machiavel (1469-1527). Pour le Florentin, la conflictualité est un horizon politique indépassable : le « peuple » doit être armé pour ne pas subir la tyrannie des « Grands » et les républiques doivent être puissantes pour ne pas subir l’impérialisme des États voisins
Temperature sensor based on topological edge states in one-dimensional photonic crystals with a superconductor cavity
No full textInternational audienceIn this study, we investigate topological edge states (TES) arising at the interface of two distinct one-dimensional topological photonic crystals (1D-TPhCs) with a superconducting layer at the interface, designed for high-performance sensing. To investigate the optical properties and topological edge states of the proposed structure, both the transfer matrix method (TMM) and the finite element method (FEM) were used. The TES and the sensitivity induced by the proposed structure strongly depend on the thickness of the superconducting layer, the polarization of the waves, and the number of periods. The proposed structure exhibits exceptional performance, with a sensitivity S nm/K, a quality factor Q , and a figure of merit FOM /K, making it a promising candidate for ultra-sensitive temperature detection in photonic sensor applications
Authoritarian nostalgia and support for (populist radical) right parties
No full textInternational audienceFor decades, party politics literature has argued that populist radical right (PRR) parties must distance themselves from their countries' authoritarian pasts to achieve electoral relevance in a Sartorian sense. Yet, we now observe the growing success and influence of PRR parties that not only embrace nostalgia for this past but also maintain ties to it. The use of what we term 'authoritarian nostalgia' is not only becoming more widespread across politics but has proven effective across diverse segments of the electorate. This study examines the extent to which (populist radical) right supporters approve of their countries' authoritarian histories and view these past regimes favourably. Using original survey data fielded in Spain and Portugal and a novel set of survey items measuring authoritarian nostalgia, we find that supporters of VOX and Chega are more likely to express a broad sense of collective nostalgia, particularly through a longing for their country's "old, glorious days", but demonstrate strong nostalgia for Franco and Salazar's authoritarian regimes more specifically. Furthermore, we observe similar affinities for the authoritarian past amongst traditional right-wing supporters, and this primarily for Partido Popular (PP) supporters in Spain (with less convincing evidence for PPD/PSD supporters in Portugal). Our findings suggest that, rather than hindering electoral performance, authoritarian nostalgia can, in fact, stimulate (populist radical) right-wing electorates.</div
Classifieurs Électroniques Organiques pour la Détection
No full textThis monograph describes nine years of research carried out at the Institute for Electronics, Micro-electronics and Nanotechnologies (IEMN), developed around defining a generic concept for detection, filling a void between metrological sensors and biological senses, sensing an environment's qualities along with their measurable properties in information generation technologies. The first chapter introduces fundamental notions of recognition for complex environments, such as for their chemistry, for which organic semiconductors can embed two new functionalities in consumer electronics. The second and third chapters mostly summarize contributions to the state-of-the-art literature on these matters: in the second chapter, on studying conducting polymers as both chemical detectors and conductimetric transducers, and the third chapter, on studying electropolymerization sensitivity to conceptualize evolutionary electronics. The fourth chapter presents several results on the conception of several "classifiers" exploiting both functionalities: in tasks aiming at integrating different sensitivities at a very small scale, at broadening sensing devices' receptive fields based on experience, and at physically engraving the experience data in a sensing hardware. Along with this monograph are also associated four appendices, summarizing different elements related to the context of this research.Ce monographe décrit neuf années de recherches menées à l’Institut d’Électronique de Microélectroniqueet de Nanotechnologie (IEMN), articulées autour de la définition un concept générique de systèmes dedétection, comblant un vide entre capteurs métrologiques et sens biologiques, qui intègrerait intrinsèquementla nature qualitative d’un environnement à ses propriétés mesurables dans les technologies de générationde l’information. Le premier chapitre introduit des notions fondamentales autour de la reconnaissanced’environnements complexes, notamment dans leur chimie, pour laquelle les semi-conducteurs organiquespermettent d’apporter deux nouvelles fonctionnalités dans l’électronique grand public. Les deuxième ettroisième chapitres résument essentiellement des contributions apportées à l’état de l’art sur ces sujets :dans le deuxième chapitre, autour de l’étude des polymères conducteurs en tant que détecteurs chimiqueset transducteurs conductimétriques, et dans le troisième chapitre, autour de l’étude de la sensibilité del’électropolymérisation pour concevoir de l’électronique évolutive. Le quatrième chapitre expose plusieursrésultats sur la conception de différents « classifieurs » utilisant ces deux fonctionnalités : dans des projetsvisant à intégrer des sensibilités variées à très petite échelle, agrandir le champs réceptif des systèmes dedétection en fonction de l’expérience, et graver physiquement l’information de cette expérience dans lematériel des systèmes de détection. Quatre annexes sont également associées à ce monographe, rassemblantdifférents éléments associés au contexte de cette recherche
Terahertz Self-Induced Dynamic Slow-Light Behavior in Metasurfaces
No full textInternational audienceDynamically reconfigurable metasurfaces are complex to realize because they require exotic materials, external stimuli, or both. However, with the advent of intense THz transients, these conventional preconditions can be bypassed. Strong THz fields are capable of invoking modulation of the electronic configuration in materials through impact ionization. In this context, we report the diligent intertwining of strong THz field-induced nonlinearities and the structural interactions of near-field coupled metastructures. We experimentally demonstrate a well-established metal-on-silicon metasurface framework to achieve reconfigurability that is devoid of any exotic materials or external stimuli. Aided by meta-geometry, intense THz transients modify the dispersion of the silicon substrate, leading to self-induced nonlinear modulations in conductivities. Altering the conductivity through impact ionization results in dynamically reconfigurable electromagnetically induced transparency (EIT) effects in a self-sustained manner, controlling the slow-light characteristics (group delay and the group velocity) by more than 6 times. These outcomes could potentially enable versatile applications in upcoming 6G technologies and on-chip silicon-based integrated photonics
Measurement of surface acoustic wave attenuation in aluminum using transverse acoustic field
No full textInternational audienceThis paper deals with the estimation of the attenuation of surface acoustic waves (SAWs). The proposed solution consists in measuring the displacement field transversely to the axis of propagation of the acoustic beam at several distances from the transducer, considering the entire field. Unlike measurements taken along the beam axis (the usual configuration), these transverse measurements avoid any positional error with respect to this axis. Furthermore, measurements in perpendicular planes integrate the beam's total energy, allowing divergence to be taken into account. Finally, as the measurement is carried out in the very near field (corresponding to the first tenth of the Fresnel zone), the SAW beam still has sufficient amplitude, enabling measurements to be made in a wider frequency range up to several tens of megahertz. The results of attenuation measurements on an aluminum sample at frequencies ranging from 10 to 50 MHz using the two approaches mentioned are reported, demonstrating the benefits of the proposed method in terms of measurement error