Conception d'une architecture logicielle pour l'intégration des systèmes de positionnement, contrôle et propulsion d'un dispositif ferromagnétique endovasculaire autonome guidé par IRM

Problématique actuelle -- Objectifs du projet -- Les piliers du projet -- Objectifs du projet -- Les piliers du projet -- Objectifs et requis de la présente étude -- Contraintes du projet -- Description de l'environnement informatique du système d'imagerie par résonance magnétique retenu -- Séquences IRM -- Environnement de développement : IDEA/ICE -- Capacités en temps réel de l'Avanto -- Interaction, intégration des modules et vues d'ensemble de l'architecture -- Constitution des classes

A half-degenerate optical resonator for cold-atom interferometry

International audienceWe present the analysis of a half degenerate optical resonator consisting of a lens located between two plane mirrors. This resonator was designed to support a large waist (cm) Gaussian beam for applications to precision inertial measurements based on large momentum transfer atom interferometry. We investigate the spatial profile of the resonating beam, and the optical gain for different beam size, and the influence of misalignments on the degeneracy of the cavity. FFT simulations show that aberrations and surface imperfections of the optics are the main contributors to spatial inhomogeneities of the resonating beam, which supports our experimental results. We also report the stability of this resonator locked to an ultra-stable optical reference

A half-degenerate optical resonator for cold-atom interferometry

International audienceWe present the analysis of a half degenerate optical resonator consisting of a lens located between two plane mirrors. This resonator was designed to support a large waist (cm) Gaussian beam for applications to precision inertial measurements based on large momentum transfer atom interferometry. We investigate the spatial profile of the resonating beam, and the optical gain for different beam size, and the influence of misalignments on the degeneracy of the cavity. FFT simulations show that aberrations and surface imperfections of the optics are the main contributors to spatial inhomogeneities of the resonating beam, which supports our experimental results. We also report the stability of this resonator locked to an ultra-stable optical reference

Study of a large mode, compact, degenerate optical resonator for a tophat beam

International audienc

Study of a large mode, compact, degenerate optical resonator for a tophat beam

International audienc

A large mode optical resonator for enhanced atom interferometry

International audienc

A large mode optical resonator for enhanced atom interferometry

International audienc

Cartographic and topo-bathymetric archive dataset on the French Rhône River (17th-20th centuries)

This dataset presents 350 cartographic and topo-bathymetric resources on the French Rhône River (530 km in length) compiled from the 17th to mid-20th century, with a temporal focus prior to extensive river training (1860s). The data were collected in 14 national, regional, and departmental archive services: National Archives of Pierrefitte-sur-Seine (AN), Bibliothèque nationale de France (BnF), National Institute of Geographic and forest information (IGN), National Company of the Rhône River (CNR), Regional Directorate for Environment, Development and Housing (DREAL), University of Grenoble, Departmental Archives of Rhône (AD69), Ain (AD01), Gard (AD30), Savoie (AD73), Drôme (AD26), Ardèche (AD07), Isère (AD38), and Vaucluse (AD84). This database contains four datasets: - The iconographic dataset. The archived resources contain 3436 images stored in 32 files and 342 sub-files. - The table describing the properties of the 350 data items. This table has 18 columns that include the following: (1) the type of data: i.e. map, cross-section, long profile, table, topo-bathymetry drawn on the map, (2) the source (archive service) and reference (box number), (3) the original title (in French) and a translated English title, (4) the scale, author, and survey period, (5) the communes covered by the upstream-downstream Kilometric Points (KPs; km 0 is in Lyon, distances upstream from this reference point are negative and distances downstream are positive; the KPs were identified in ArcMap 10.5 using the GIS layer of riverine communes and active channels in 1860, to help in locating the maps with secondary channels), (6) comments on the quality and content of the data, (7) the number of images and their type (on a table or a magnetic board, HD scan, scanned and georeferenced), and (8) the storage file and sub-file. - The table listing the 281 archive box references consulted in this study. - The GIS polyline layer of the longitudinal coverage of the 350 data items (geographic coordinate system: WGS84 EPSG 4326)