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Juliane Werner: Existentialisme en Autriche. Traduction d'une notice de dictionnaire en ligne. In: DECAF - Dictionnaire des Echanges Culturels entre l'Autriche et la France / Projet-ANR-22-CE91-0001
No full textJuliane Werner: Existentialismus in Österreich. Notice de dictionnaire en ligne. In: DECAF - Dictionnaire des Echanges Culturels entre l'Autriche et la France / Projet-ANR-22-CE91-0001Der Eintrag gibt einen Überblick, wie das existentialistische Schreiben, Denken und Leben des Pariser Kreises um Jean-Paul Sartre nach dem Zweiten Weltkrieg in Österreich aufgenommen wurde, in Periodika, am Theater, an Universitäten, als Mode und Subkultur sowie als literarischer und philosophischer Impuls für österreichische Schriftsteller und Schriftstellerinnen.Cette notice propose une analyse de la réception en Autriche de l’écriture, de la pensée et du mode de vie existentialistes développés au sein du cercle parisien entourant Jean-Paul Sartre[1] après la Seconde Guerre mondiale. Elle examine cette réception à travers divers canaux, tels que la presse périodique, le théâtre, les universités, mais aussi en tant que phénomène de mode, expression d’une sous-culture ou encore comme source d’inspiration littéraire et philosophique pour les écrivaines et les écrivains autrichien·ne·s
Effets de la taille et de l’indépendance du Conseil d’Administration sur la performance des sociétés endettées
No full textInternational audienceCet article s’intéresse aux relations entre la structure du CA et la performance des sociétés endettées. L’endettement, comme moyen de contrôle du dirigeant et facteur de complexité, est considéré comme une problématique majeure en gouvernance financière. L’article propose d’étudier l’effet de la taille et de l’indépendance du CA sur la performance des sociétés endettées. L’étude statistique repose sur les sociétés appartenant à l’indice CAC All-Tradable entre 2015 et 2019. Les résultats démontrent surtout qu’il n’est pas dans l’intérêt financier des sociétés endettées d’opter pour des CA de taille importante et majoritairement indépendants
Fast Field Strength Prediction Using Modern Machine Learning in European Cities From Few RF-EMF Measurements: A Neural Tangent Kernel Perspective
No full textInternational audienceThe rapid growth of 5G and 6G networks, with their dense deployments, millimeter wave communications, and dynamic beamforming, necessitates scalable simulation tools for performance evaluation, network design, and electromagnetic field (EMF) exposure assessment. EMF simulations model exposure across frequency, space, and time, typically based on base stations, user devices, and deterministic and empirical models. These simulations are essential for network operators and researchers for network planning, assessing human exposure to RF-EMF, and ensuring compliance with safety regulations considering factors like frequency, power levels, antenna configurations, and the environment, but they often require extensive computational resources and large simulation time. To address this, we propose an infinitely wide convolutional neural network approach for fast and accurate EMF exposure estimation. Remarkably, taking the width of a neural network to infinity allows for improved computational performance. We compute a convolutional neural tangent kernel from the infinite-width network to perform matrix imputation for exposure estimation. Proposed method estimates exposure fields using less than 7% of simulation points and outperforms other machine learning models, predicting exposure levels which fall below the safety limit set by ICNIRP in under 3, 66 × 10−3 seconds
Caractérisation d'un environnement industriel 4.0 pour la localisation par interférométrie
No full textInternational audienceCaractérisation d'un environnement industriel 4.0 pour la localisation par interférométri
[Invited] Topological Phase Transitions And Edge States In Ssh-type Elastic Systems With Periodic And Disordered Non-hermitian Modulations
No full textInternational audienceBased on a generalized Su-Schrieffer-Heeger model, we design a non-Hermitian periodic or disordered elastic platform with feedback control where we theoretically study the topological phase diagrams and edge states. Considering both one and two-dimensional structures, we demonstrate in theory and simulations the relative effects of non-Hermiticity and disorder
Thermal Enhancement of GaN Schottky Diodes Annealed at 600°C for High Power and High Temperature RF Applications
No full textInternational audienceIn this paper, we report the investigation of the thermal enhancement and the behavior of GaN Schottky diodes grown by metal organic chemical vapor deposition (MOCVD) on sapphire substrates for RF power applications and their potential to operate under extreme temperature. The Schottky barrier diodes show a Schottky barrier height ( B) close to 0.93 eV and an ideality factor (η) near unity with 1.03. Pt/Au anodes annealed at 500°C and 600ºC show an improvement of the electrical characteristics and a breakdown voltage as high as 130 V for a drift layer thickness of 1 μm and doping of 10ˆ16 cm-3
STABILITY OF ABSTRACT COUPLED SYSTEMS
No full textWe study stability of abstract differential equations coupled by means of a general algebraic condition. Our approach is based on techniques from operator theory and systems theory, and it allows us to study coupled systems by exploiting properties of the components, which are typically much simpler to analyse. As our main results we establish resolvent estimates and decay rates for abstract boundary-coupled systems. We illustrate the power of the general results by using them to obtain rates of energy decay in coupled systems of one-dimensional wave and heat equations, and in a multi-dimensional wave equation with an acoustic boundary condition
Silicate–sulfide interaction within quenched melts of space weathered Ryugu grains
No full textInternational audienceThe first few microns of the surface of airless bodies are subject to severe changes due to the harsh environment of space, known as space weathering. The Hayabusa2 sample return mission from the asteroid Ryugu provides the first opportunity to study these effects on a carbonaceous and hydrated body. Understanding the structural and chemical changes that occur in the space weathered layers of Ryugu is crucial to correctly interpreting the mechanisms involved in such processes. This study employs transmission electron microscopy to achieve the spatial resolution necessary to analyze the nanoscale heterogeneities in these modified layers. The chemical analyses indicate that features present are likely to represent the spattering of a Ryugu‐like material, possibly from a different lithology of the asteroid. However, such material appears to be completely dehydroxylated and depleted in sulfur by approximately 20%. Furthermore, the nanoscale dispersion of vesicles and rounded nanosulfides found in these melt layers helps to estimate the temperatures (>1300°C) and the time scales (<10−8 s) involved in their formation. In addition, this study describes and discusses a unique spherical feature not previously observed in Ryugu samples. The 3 μm‐sized object shows strong similarities to microchondrules observed in some carbonaceous (CM2) and ordinary chondrites, suggesting a divergent thermal history from that of the melt layers