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The stability of 3D skyrmions under mechanical stress studied via Monte Carlo calculations
No full textInternational audienc
Dual Photocatalysis for the Straightforward Coupling of Thiosugars and Arylsulfoximines: Towards Unprecedented Cyclic Heteroatomic Structures
No full textInternational audienceA general, scalable and easy to implement protocol is described for the coupling of thiosugars and various ortho-functionalized S-aryl S-perfluoroalkyl sulfoximines. This dual photocatalysis methodology was developed with a commercial hydrogen atom transfer reagent and produced key structures that were transformed into original cyclic skeletons bearing previously undescribed chemical functions
3D Modelling Approach for Ancient Floor Plans' Quick Browsing
No full textInternational audienceAlthough 2D architectural floor plans are a commonly used way to express the design of a building, 3D models provide precious insight into modern building usability and safety. In addition, for a historical monument like the Palace of Versailles, the 3D models of its ancient floor plans help us to reconstruct the evolution of its buildings over the years. Such old floor plans are hand made and thus present some problems in automatic creation of a 3D model due to the drawing style variability. In this paper, we introduce a fully automatic and fast method to compute 3D building models from a set of architectural floor plans of the Palace of Versailles dated to the 17 th and 18 th century. First, we detect and localise walls in an input floor plan image using a statistical image segmentation model based on the U-net convolutional neural network architecture and a binary wall mask image is obtained. Secondly, using the generated wall mask image, the 3D model is built upon the linear edge segments representing the detected wall sides in the mask image. In order to cope with the lack of accurate ground truth information for the 3D models of ancient floor plans, we use a dedicated semi-automatic software to build a set of reference 3D models that describe plans' wall projections from three sides of view. We evaluate the performance of our approach on an input floor plan image by measuring the overlapping between the 3D reference model and our 3D model. Our fast and fully automatic approach performs efficiently and produces quite accurate 3D models with 84.2% of IoU score in average. Furthermore, its performance surpasses the performance of the state of the art approach in the wall detection task
Le kit Aller-vers, destiné au Centre de Ressources en Travail Socialhttps://jouvegroup.sharepoint.com/:w:/r/sites/DGCS-Groupeprojet/Documents%20partages/Kit%203%20-%20Aller%20vers/4.%20Brief/Brief%20M%20Base%20kit%203%20-%20ALLER%20VERS_vLL%2002.02.2022.docx?d=wf9aeb41d5553452cbe340d7f4a028cdb&csf=1&web=1&e=04zG0M
No full textLe kit Aller-vers, destiné au Centre de Ressources en Travail Socialhttps://jouvegroup.sharepoint.com/:w:/r/sites/DGCS-Groupeprojet/Documents%20partages/Kit%203%20-%20Aller%20vers/4.%20Brief/Brief%20M%20Base%20kit%203%20-%20ALLER%20VERS_vLL%2002.02.2022.docx?d=wf9aeb41d5553452cbe340d7f4a028cdb&csf=1&web=1&e=04zG0
Dispositif hybride et classe inversée : lexiculturologie numérique en CLE
No full textInternational audienc
Anomalous diffusion in single and coupled standard maps with extensive chaotic phase spaces
No full textInternational audienceWe investigate the long-term diffusion transport and chaos properties of single and coupled standard maps. We consider model parameters that are known to induce anomalous diffusion in the maps' phase spaces, as opposed to normal diffusion which is associated with Gaussian distribution properties of the kinematic variables. This type of transport originates in the presence of the so-called accelerator modes, i.e. non-chaotic initial conditions which exhibit ballistic transport, which also affect the dynamics in their vicinity. We first systematically study the dynamics of single standard maps, investigating the impact of different ensembles of initial conditions on their behavior and asymptotic diffusion rates, as well as on the respective timescales needed to acquire these rates. We consider sets of initial conditions in chaotic regions enclosing accelerator modes, which are not bounded by invariant tori. These types of chaotic initial conditions typically lead to normal diffusion transport. We then setup different arrangements of coupled standard maps and investigate their global diffusion properties and chaotic dynamics. Although individual maps bear accelerator modes causing anomalous transport, the global diffusion behavior of the coupled system turns out to depend on the specific configuration of the imposed coupling. Estimating the average diffusion properties for ensembles of initial conditions, as well as measuring the strength of chaos through computations of appropriate indicators, we find conditions and systems' arrangements which systematically favor the suppression of anomalous transport and long-term convergence to normal diffusion rates
Le lâcher-prise, une solution en cas d'échec ? Par Béatrice Mabilon-Bonfils
No full textarticle de blog et chronique radio France ble
Reaction dynamics within a cluster environment
No full textInternational audienceThis perspective article reviews experimental and theoretical works where rare gas clusters and helium nanodroplet are used as nanoreactor to investigate chemical dynamics in a solvent environment. A historical perspective is presented first, then specific considerations on the mobility of reactants within these reaction media. The dynamical response of pure clusters and nanodroplets to photoexcitation is shortly reviewed before examining the role of the cluster (or nanodroplet) degrees of freedom on the photodynamics of the guest atoms and molecules
La formation en question au sein des TNE - TNE Bretagne
No full textLa formation en question au sein des TNE - TNE Bretagn