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Spectroscopie du 4(5)-méthylimidazole et de ses hydrates, hébergés en gouttelette d'hélium
No full textInternational audienc
Comment associer citoyens et experts aux décisions politiques ?
No full textarticle de réflexion sur politique et citoyennet
PWM-Induced Current Modelling in Stator Slots with Multiple Stacked Coils
No full textInternational audienceThis paper deals with the PWM-induced current and losses in a specific segmented winding structure. The proposed segmentation process enables to split a winding into several coils. These latter are supplied independently by H-bridge converters and are wound around the same magnetic circuit. This process leads to a deeper segmentation of electric drives for enhanced modularity and reduced voltage rating. The strong magnetic coupling between each coil is described, and the control degrees of freedom are presented. This study provides a model based on an analytical method and on an equivalent electrical circuit calibrated through experimental results. A trade-off is found between the losses related either to the distribution of the fundamental component of currents or to the switching power converter supply
« Il est nécessaire de te relire ! » : Que disent les annotations des enseignants sur leur conception de l’écriture et qu’en font les élèves ?
No full textNational audienceBased on a corpus of 264 end-of-primary-school copies, we propose an analysis of teachers' annotations concerning written and rewritten texts of various genres, based on their classification in terms of their objects, natures, syntactic characterizations and modes of enunciation, and we ask the question of their effects on the pupils.À partir d’un corpus de 264 copies de fin d’école primaire, nous proposons une analyse des annotations des enseignants concernant des textes écrits et réécrits de genres variés, à partir de leurs classements quant à leurs objets, leurs natures, leurs caractérisations syntaxiques et leurs modalités d’énonciation et nous posons la question de leurs effets sur les élèves
Les dictionnaires à l’heure du Do It Yourself : Quelle place pour le lexicographe ?
No full textInternational audienc
In Search of a Neural Model for Serial Order: a Brain Theory for Memory Development and Higher-Level Cognition
No full textInternational audienc
Boundary element method with high order impedance boundary condition in electromagnetism
No full textThe present paper introduces a surface formulation to solve the scattering problem for coated objects using the integral method and a high order impedance boundary condition (HOIBC). We study the existence and uniqueness of the solution, and we propose a discretization of this formulation trough Rao-Wilton-Glisson functions (RWG). Numerical results are obtained with a 3D MoM code running on MPI clusters. The experiments show how the HOIBC significantly improves the accuracy of the results compared to computations using the standard impedance boundary condition (SIBC)
Linking pressure gradients with the stability of molecular clouds in galactic outflows
No full textInternational audienceThe jets launched by actively accreting black holes are capable of launching several of the massive (million or billion solar mass) molecular outflows observed in galaxies. These outflows could suppress or enhance star formation in galaxies. To investigate the stability of clouds capable to form stars in outflows, we modeled CO and HCO+ ALMA data of the galaxy IC5063, in which black-hole jets impact molecular clouds. Using a radiative transfer code that self-consistently performs astrochemical and thermal balance calculations based on the available gas heating sources, we found that mechanical heating and cosmic ray (CR) heating are fully capable of individually reproducing the data. In our best-fit model, CRs provide about 1/3rd of the dense gas heating at the radio lobes, emphasizing the role of this often neglected mechanism in heating the gas and potentially generating outflows. The gas temperature and density indicate that the jet passage leads to an increase of about 1 order of magnitude in the internal pressure Pi of molecular clouds (with Pi/k from 8*10^5 up to 7*10^6 K cm^-3), irrespective of the excitation mechanism. From the fluxes of [S II] and [N II] lines in VLT MUSE data, the external pressure Pe of molecular clouds increases in several regions enough to exceed Pi. This result leads us to conclude that we are observing the expansion of an ionized overpressurized cocoon that compresses molecular clouds and that could lead to their collapse. Some jet-impacted clouds, nonetheless, near pathways that the jet cleared have increased Pi and decreased Pe. They are likely to undergo evaporation of their outer layers. Part of the evaporated layers could mass load the outflow thanks to ram pressure from co-spatial ionized gas flows. The observed pressure changes thus suggest that both star formation enhancement and suppression could simultaneously occur
La peine de mort, une histoire pénitentiaire. Le régime carcéral des condamnés à mort dans les prisons françaises, Cahier d'études pénitentiaires et criminologiques n°57
No full textCahier d'études pénitentiaires et criminologique