129 research outputs found
Un trivial sportâsantĂ©
peer reviewedLâĂ©volution de la sociĂ©tĂ© est telle que la sĂ©dentaritĂ© et le nombre de personnes en surpoids ne font quâaugmenter. En touchant la quasi-totalitĂ© des jeunes, lâĂ©ducation physique se trouve en premiĂšre ligne pour agir. Toutefois, le temps hebdomadaire qui lui est imparti et le temps dâactivitĂ© effectif dans une leçon ne peuvent ĂȘtre suffisants pour exercer un effet dĂ©cisif sur leur santĂ©. Il peut alors ĂȘtre intĂ©ressant que le professeur dâĂ©ducation physique endosse un rĂŽle supplĂ©mentaire dâĂ©ducateur Ă la santĂ©. Le principe est de faire acquĂ©rir les compĂ©tences (motrices, techniques, tactiques, etc.) prĂ©vues par le programme mais aussi et surtout, dâapporter aux Ă©lĂšves des informations importantes pour leur vie de citoyen, des idĂ©es, des astuces, des mises en garde quâils pourraient retenir et appliquer au quotidien. Ainsi la physical literacy (lâĂ©ducation de lâĂ©lĂšve par le mouvement) et lâaccountability (le fait dâamener un Ă©lĂ©ment nouveau supplĂ©mentaire Ă lâĂ©lĂšve lors de chaque cours) deviennent prioritaires donnant rĂ©ellement Ă lâĂ©ducation physique lâambition dâune formation de citoyens physiquement Ă©duquĂ©s. Cela nĂ©cessite de faire Ă©voluer les pratiques des enseignants et de faire que la dimension santĂ© constitue un fil rouge tout au long de la scolaritĂ© des Ă©lĂšves. En effet, les approches liant santĂ© et EPS reposent trĂšs souvent sur la motivation extrinsĂšque des Ă©lĂšves (points, sanction, Ă©valuation certificativeâŠ) en contradiction avec lâambition Ă©ducative visant « lâimplication spontanĂ©e » des jeunes et le concept dâancrage sociĂ©tal qui est actuellement privilĂ©giĂ© dans certaines structures de formation. Nous avons donc envisagĂ© un dispositif visant lâacquisition de connaissances thĂ©oriques en situation, avant, pendant ou aprĂšs chaque leçon, au bĂ©nĂ©fice de lâimplication des Ă©lĂšves
Immersion dans un environnement 3 dimensions - Atelier pratique
Introduction et objectifs de lâatelier pratique
Dans le cadre de lâapplication des nouvelles technologies au service de lâapprentissage, la vidĂ©o trois dimensions permet dâimmerger le praticien au sein dâun contexte rĂ©el. Ceci a notamment pour intĂ©rĂȘt de lui offrir la possibilitĂ© de sâentraĂźner Ă agir au sein de contextes prĂ©alablement dĂ©finis. Lâobjectif de cet atelier pratique est donc de faire vivre cette expĂ©rience aux enseignants-chercheurs intĂ©ressĂ©s par le concept afin de voir Ă quel point lâimmersion au sein dâune vidĂ©o filmĂ©e en 360° peut aider Ă la formation des intervenants dans le milieu de lâactivitĂ© physique.
Description de lâatelier pratique
DiffĂ©rentes sĂ©quences vidĂ©os ont Ă©tĂ© enregistrĂ©es prĂ©alablement Ă lâaide dâune camĂ©ra 360°. Celles-ci ont pris pour cadre diffĂ©rentesdisciplines sportives (athlĂ©tisme, sports collectifs âŠ). Durant lâatelier, les praticiens auront lâoccasion de choisir une des situations proposĂ©es et de sây immerger Ă lâaide dâun casque de rĂ©alitĂ© virtuelle. Une fois intĂ©grĂ© dans lâenvironnement, lâintervenant sera invitĂ© Ă agir comme sâil animaitrĂ©ellement une sĂ©ance de cours (observations, feedbacks, encouragements âŠ). Les autres participants pourront suivre sur un grand Ă©cran le film de la sĂ©ance afin de se rendre compte de ce que vit lâintervenant immergĂ© dans lâenvironnement 3D. AprĂšs chaque sĂ©quence, une pĂ©riode dâĂ©changes sera proposĂ©e afin de partager les ressentis.
Apports et perspectives de lâatelier pratique
Pour les participants, lâapport principal de cet atelier consiste Ă pouvoir tester une nouvelle technologie pouvant, Ă court terme, ĂȘtre utilisĂ©e comme outil dâapprentissage. En effet, plusieurs axes de formation peuvent ĂȘtre imaginĂ©s sur base de la vidĂ©o 3D : sâentraĂźner au sein de contextes inhabituels ou difficiles Ă gĂ©rer pour lâintervenant, comparer son action avec celles dâautres personnes ayant agi dans un environnement strictement identique, revoir sa propre performance afin de faire son auto-critique, ĂȘtre guidĂ© durant lâaction par un formateur afin dâatteindre des objectifs prĂ©dĂ©finis (rĂ©aliser une meilleure observation, donner plus de feedbacks, âŠ)
Analyse qualitative du contenu des temps morts en volleyball Ă l'aide de la 3D
The timeout in sport is relatively well analysed in the literature. Nevertheless, no study concerns the relevance of the information transmitted to the players. Our study aims to determine the relevance of the content transmitted to the players during volleyball timeouts with a 3D device. We immerged 17 coaches into two sequences of a volleyball game. They had to think aloud during the game and talk directly to the players during the timeouts. Between the sequences, they also had to transcribe and rate all the observations they remembered. By comparing the observations made, the speech during the timeouts and the rating of the coachesâ observations, we obtained some interesting results. Few coaches transmitted all the observations considered as the most important to their players during the timeouts, but this selection of the information seemed better in a negative game context. Another result is that the coaches did not seem to be influenced by the short-term memory as the transmitted content rarely corresponded to the last observations made just before the timeout. This study offers perspectives in coaching analysis and education as the 3D device seems to be a tool allowing the study of aspects difficult to attain with other methods
Relevance of 3D video observation training tool in competitive context: Exploratory research with volleyball coaches
CO2 Injectivity in geological storages: an overview of program and results of the GeoCarbone-Injectivity Project
International audienceThe objective of the GeoCarbone-Injectivity project was to develop a methodology to study the complex phenomena involved in the near wellbore region during CO2 injection. This paper presents an overview of the program and results of the project, and some further necessary developments. The proposed methodology is based on experiments and simulations at the core scale, in order to understand (physical modelling and definition of constitutive laws) and quantify (calibration of simulation tools) the mechanisms involved in injectivity variations: fluid/rock interactions, transport mechanisms, geomechanical effects. These mechanisms and the associated parameters have then to be integrated in the models at the wellbore scale. The methodology has been applied for the study of a potential injection of CO2 in the Dogger geological formation of the Paris Basin, in collaboration with the other ANR GeoCarbone projects
Anthropologies numériques une nouvelle édition
Le Cube et Les Ă©crans de la libertĂ© proposĂšrent deux jours de dĂ©couvertes et de rencontres autour de lâanthropologie, des arts numĂ©riques et du cinĂ©ma. Des crĂ©ateurs et des chercheurs de renommĂ©e internationale sont venus prĂ©senter des nouvelles formes dâexpressions anthropologiques et artistiques autour de la projection de films, de web-documentaires, dâinstallations et de discussions. La rĂ©alitĂ© nâest-elle pas toujours lâobjet de perceptions diffĂ©rentes, tour Ă tour sensibles, rationnelles,..
Implementation of ultrasonic sensing for high resolution measurement of binary gas mixture fractions
We describe an ultrasonic instrument for continuous real-time analysis of the fractional mixture of a binary gas system. The instrument is particularly well suited to measurement of leaks of a high molecular weight gas into a system that is nominally composed of a single gas. Sensitivity < 5 Ă 10â5 is demonstrated to leaks of octaflouropropane (C3F8) coolant into nitrogen during a long duration (18 month) continuous study. The sensitivity of the described measurement system is shown to depend on the difference in molecular masses of the two gases in the mixture. The impact of temperature and pressure variances on the accuracy of the measurement is analysed. Practical considerations for the implementation and deployment of long term, in situ ultrasonic leak detection systems are also described. Although development of the described systems was motivated by the requirements of an evaporative fluorocarbon cooling system, the instrument is applicable to the detection of leaks of many other gases and to processes requiring continuous knowledge of particular binary gas mixture fractions
High power multimode fiber amplifier with wavefront reshaping for high beam quality recovery
International audienc
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