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Art-thérapie dans l’éducation thérapeutique ambulatoire du patient diabétique : les arts plastiques et le mouvement pour renforcer l’estime de soi et le lâcher prise
No full textPatients suffering from diabetes, a chronic metabolic disease, are faced with increased vigilance of their blood sugar and a permanent adaptation of their quality of life to regulate it and limit its complications. In order to facilitate their knowledge of the pathology and their adaptation to its consequences, therapeutic education programs are offered to volunteers. The patient actively participates in the workshops to increase their autonomy. Faced with the need to adapt and develop psychosocial skills, we have set up an art therapy cycle within the association of ETP, Diablim, with the objectives of strengthening self-esteem and letting go. Our study reveals what art therapy can bring to patients through collective sessions structured mainly around the visual arts and movement. In the first part, we present the pathology, its consequences, the interests of art therapy and the media used, then describe the experiment conducted and the therapeutic strategy adopted. Following is the presentation of the results from two of the beneficiaries and our analysis. Finally, in part 4, we open the discussion around these results, the limits of the study, our posture and question the link with education and the benefits of interdisciplinarityLes patients souffrant de diabète, pathologie chronique métabolique, sont confrontés à une vigilance accrue de leur glycémie et une adaptation permanente de leur qualité de vie pour la réguler et en limiter les complications. Afin de faciliter leur connaissance de la pathologie et leur adaptation à ses conséquences, des programmes d’éducation thérapeutique du patient sont proposés aux personnes qui le souhaitent. Le patient prend part activement aux ateliers afin d'accroître son autonomie. Face à la nécessité de s’adapter et des compétences psychosociales à développer, nous avons mis en place un cycle d’art-thérapie au sein de l'association ETAP Diablim avec pour objectifs de renforcer l’estime de soi et le lâcher prise. Notre étude révèle ce que peut apporter l’art-thérapie aux patients au travers de séances collectives structurées principalement autour des arts plastiques et du mouvement. En première partie, nous présentons la pathologie, ses conséquences, les intérêts de l’art thérapie et des média utilisés, pour ensuite décrire l’expérience menée et la stratégie thérapeutique adoptée. Suit l’exposé des résultats de deux des bénéficiaires et notre analyse. Enfin, en 4e partie, nous ouvrons la discussion autour de ces résultats, des limites de l’étude, de notre posture et questionnons le lien avec l’éducation et les bénéfices de l’interdisciplinarit
Phenomenological Aerodynamic Analysis of an Ejector Exposed to Large Inlet Pulsations
No full textInternational audienceTo enable the coupling of the unsteady, high-enthalpy flow exiting a Rotating Detonation Combustor (RDC) with a subsonic turbine, an ejector may be installed between the combustor and turbine. In the present work, a conventional ejector is investigated numerically using a Large-Eddy Simulation. Firstly, a stationary operating point is analyzed where sufficient agreement could be obtained with experimental data. Secondly, a new operating point is proposed where a sinusoidal acoustic pulsation is imposed at the primary ejector inlet. The pulsation generates a periodic fluctuation between sub- and supersonic velocity regimes at the primary nozzle exit, which is representative of local RDC exhaust velocities. In this first step, the exhaust gas temperature, flow angle, and gas composition are not considered. At this operating condition, a secondary normal shock appears periodically at the end of the constant-area mixing chamber and retracts upstream as a pressure wave. The shear layer, the boundary layer, the secondary shock, and the diffuser-induced separation are identified as kinetic energy loss sources within the ejector. The amplitude of total pressure fluctuations is reduced by 85% throughout the device, whereas the frequency is retained. The dampening characteristics are considered favorable for gas turbine integration
Considerare la multilinearità del corpo nella descrizione del movimento tramite Typannot
No full textInternational audienceLes Langues des Signes (LS) et la gestualité co verbale (GcV) sont produites par les mouvements du corps du locuteur en mobilisant ses différentes parties, de manière simultanée ou non. C’est principalement en raison de cette nature corporelle, multilinéaire et fortement inscrites dans une dynamique temporelle que le mouvement — pris en tant qu’objet d’étude linguistique à part entière — résiste aux tentatives de transcription systématique. Historiquement, la description du mouvement est réduite à une succession de postures et/ou aux trajectoires dessinées par les mains. Cette simplification impacte la capacité des linguistes à interroger le rôle du corps dans la constitution et la modulation du sens en LS. Typannot est un système de transcription typographique qui, en se basant sur une approche kinésiologique du mouvement , propose une description articulatoire du mouvement du corps (Boutet, 2018). Ce dernier y est analysé comme un ensemble de systèmes articulatoires (visage, doigts, membres supérieurs, etc.) composés d’articulateurs possédant chacun divers degrés de liberté (DdL). Nous présentons comment Typannot permet de décrire les mouvements en LS et GcV comme des phénomènes de transformations complexes distribués dans le temps et révélateurs de l’organisation corporelle productrice de sens.Bibliographie :Boutet D. (2018). Pour une approche kinésiologique de la gestualité: synthèse. Habilitation à diriger des recherches (HDR), Université de Rouen Normandie
Effet de la menace du stéréotype liée au vieillissement sur la capacité d’adaptation stratégique en mémoire épisodique en fonction de la difficulté de la tâche
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Fracture toughness and fatigue crack propagation resistance of a pressure vessel low-alloy steel in CH4/H2 gas blends
No full textInternational audienceThis paper reports on an experimental study initiated in the framework of the HORIZON EUROPE BioStar2C project to review the applicability of Compressed Natural Gaz (CNG) tank to gas blends containing biomethane and a small percentage of hydrogen. Indeed, up to now, standards recommend a maximum percentage of 2% hydrogen in volume in the gas. However, the effect of an hydrogen concentration around 2% on the susceptibility to hydrogen embrittlement of the steel used has not been extensively documented so far. Within this framework, the present study is concerned with the fracture toughness and fatigue crack growth resistance of a low-alloy 34CrNiMo6 steel in methane blended with different hydrogen concentrations of 2%, 4% and 6%. A special attention was paid to the impact of hydrogen on fracture toughness properties, namely KQ, CTOD and Jm, and to the fatigue crack growth rate enhancement under cyclic loading. The results indicate a limited effect of the hydrogen percentage, in the range considered, on the fracture toughness properties KQ, CTOD and Jm , while the fatigue crack growth rates are in any case typically one order of magnitude higher than in air. These data are analysed on the basis of fracture surface observations. Finally, a comparison with data obtained in hydrogen gas with a pressure corresponding to the 4% blend suggests an effect of the total pressure, particularly pronounced around the transition between the moderately accelerated and the highly-accelerated fatigue crack growth regimes.Differences in the mechanisms at play are discussed
Navigation et transition dans le dialogue : étude des marqueurs de projet dans les interactions d’escape game en anglais
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The role of oxygen vacancies on the hydrodeoxygenation of lignin-derived compounds over Pd/SiCeO<sub>2</sub> catalysts
No full textInternational audienceThis work studies the effect of oxygen vacancies in a silica-doped ceria support on the mechanism of HDO reaction of phenol, m-cresol, xylenol and anisole over Pd-based catalysts. Increasing the silica content increased the density of oxygen vacancies due to the decrease in the CeO2 crystallite size. The addition of silica also promoted the reaction rate for HDO of phenolic compounds, whereas the rate for HDO of anisole remained approximately constant. These results revealed that the oxygen vacancies promoted the cleavage of the C-OH bond of phenolic molecules. Moreover, the presence of an electron donor on the aromatic ring reduces the energy barrier necessary for the cleavage of the Carom – OH bond. In the case of anisole, this molecule adsorbs on the Ce cations close to the metallic particles and then, the variation of the concentration of oxygen vacancies does not affect the rate of HD
Design and analysis of a redundant actuated humanoid wrist joint parallel mechanism
No full textInternational audienceWith the widespread application of humanoid robots and industrial robotic arms in production and daily life, their limited flexibility and weak load-bearing performance have become inadequate to meet practical demands. This study employs biomimetic design principles to analyze the biomechanical and structural properties of the human wrist joint. Based on this analysis, we propose a novel redundantly driven two-degree-of-freedom (2-DOF) parallel mechanism. Firstly, kinematic analysis is conducted from perspectives including degrees of freedom, inverse kinematics, and Jacobian matrix, with its performance validated through numerical models and simulation analysis. Subsequently, the mechanism's performances are evaluated through workspace analysis, singularity investigation, and dexterity assessment, demonstrating its singularityfree workspace and high operational dexterity. Based on these analyses, an experimental platform was established, physical prototypes were fabricated, and a control system was designed. The experimental results validate both the feasibility of the humanoid wrist joint design and its potential for practical applications. This structure demonstrates broad applicability across multiple fields, such as humanoid robot wrist joints, wrist rehabilitation equipment, industrial robotic arms, and special robots
Influence of high-voltage electrode shape on granular metal particle trajectories in a roll-type electrostatic separator
No full textInternational audienceElectrostatic separation is recognized as an effective and robust recycling method, offering advantages such as low cost, energy efficiency and simplicity in operation. Nevertheless, the process is complex and involves multiple factors, necessitating careful selection of geometric and electrical parameters to effectively handle various material combinations and achieve optimal results. This study investigates the effects of the shape of the electrode connected to the high voltage (HV), the variation in the distance between the HV electrode and the rotating grounded cylindrical electrode, and the angular position of the HV electrode on the trajectories of conductive metal particles in a roll-type electrostatic separator. For this purpose, the particle trajectories were visualized with a High-speed camera. Indeed, visualizing the particle trajectories proved useful and innovative in terms of electrode design. The position and shape of the HV electrode were found to be influential parameters in the particle trajectories. The visualization of these trajectories allowed the adjustment of the HV electrode’s position to prevent interference with low-mass aluminum particles. It was found that better control of the particle trajectories can be achieved by using an inverted S-shaped HV electrode as compared to using an elliptical HV electrod