Search results for "thèse"
showing 10 items of 68 documents
L'appropriation par l'entreprise partenaire des résultats d'une thèse CIFRE : exemple d'une recherche portant sur la formation initiale des sapeurs-p…
2023
Comparing Tangible and Fully Virtual Haptic Systems for HMI Studies in Simulated Driving Situations
2019
International audience; The contribution of tangible and intangible feedback is compared for virtual tactile car Human-Machine Interfaces (HMI) design, to measure their performance both in static conditions and while driving. A subjectively calibrated transparent glass provides tangible passive haptics, and visual cues are used to study sensory substitution-based intangible interactions. The results show that the performance of the subjects was significantly improved in driving conditions as they interacted faster, more accurately and with a higher satisfaction. In addition, our findings highlight that the contribution of tangible systems is significantly lower in driving conditions, raisin…
Effect of Footstep Vibrations and Proprioceptive Vibrations Used with an Innovative Navigation Method
2017
This study proposes to investigate the effect of adding vibration feedback to a navigation task in virtual environment. Previous study used footstep vibrations and proprioceptive vibrations in order to decrease the cyber-sickness and increase the sense of presence. In this study, we experiment the same vibration modalities but with a new navigation method. The results show that proprioceptive vibrations do not impact the sense of presence neither the cyber-sickness while footstep vibrations increase sense of presence and decrease in a certain way cyber-sickness. Burgundy region through the JCE funding project
Protonic ceramic fuel cell : elaboration and characterization. Investigation of the BaZr0.8Y0.2O3-d electrolyte by electrochemical impedance spectros…
2021
One of the current global challenges is to find novel, clean and efficient techniques for the energy production. The use of electrochemical cells and hydrogen is one of the solutions. These cells convert the excess energy produced by conventional systems into hydrogen by steam electrolysis. The hydrogen can be stored and transformed into electricity when needed in the fuel cell mode. Among the different electrochemical cells, protonic ceramic electrochemical cells have attracted much attention due to their high efficiency at intermediate temperature (400 – 600 °C). In addition, these systems offer the advantage of not diluting the fuel in electrolysis mode. This thesis work focuses on the e…
Archéozoologie des installations rurales de la fin de l'âge du Fer au début du Moyen Age
1995
Lepetz Sébastien, Méniel Patrice, Yvinec Jean-Hervé. Archéozoologie des installations rurales de la fin de l'Âge du Fer au début du Moyen Âge. In: Histoire & Sociétés Rurales, n°3, 1er semestre 1995. L'histoire rurale en France. Actes du colloque de Rennes (6-7-8 octobre 1994) pp. 169-182.
Organisation et conditions de la formation des doctorants dans le cadre de l'université française
2007
This research, refering to the theoretical framework of Pierre Bourdieu, shows that higher education can be considered as a “champ scientifique”, defined as a microcosm, relatively autonomous from the economic and social macrocosm, nevertheless strongly affected by its values and its evolution toward liberalism. This evolution is clearly perceveid in the structural reforms (contractualization, decentralization, increased autonomy...) inferred notably by the construction of the European Higher Education and Research Area. Higher education is structured in a hierarchy with dominating disciplines (mathematics, physique, chemistry...) at the center and, dominated disciplines (Social sciences an…
Visual scale factor for speed perception
2011
Speed perception is an important task depending mainly on optic flow that the driver must perform continuously to control his/her vehicle. Unfortunately, it appears that in some driving simulators speed perception is under estimated, leading into speed production higher than in real conditions. Perceptual validity is then not good enough to study driver’s behavior. To solve this problem, a technique has recently seen the light, which consists of modifying the geometric field of view (GFOV) while keeping the real field of view (FOV) constant. We define our visual scale factor as the ratio between the GFOV and the FOV. The present study has been carried out on the SAAM dynamic driving simulat…
Synthèse et réactivité chimiques et électrochimiques de dérivés d'imidazoliums : vers des procédés éco-responsables
2015
This work deals with the use of electrochemistry as a tool for alternative synthesis of new azolium-based molecules.A new electrosynthesis method was developed for the synthesis of imidazolium carboxylates (masked carbenes) leading to a wide library of compounds. This approach was compared to already reported chemical syntheses. In the current context of sustainable development, bio based products have been synthesized and optimization of the process was achieved in order to reduce waste and energy consumption.The key role of the hydrogenoxalate anion was demonstrated in the synthesis of ionic liquids and/or imidazolium salts. Some of them were employed as recyclable catalysts for Fischer e…
Aspects régionaux de l’élevage en Gaule septentrionale au second âge du Fer
2020
L’étude des restes animaux livre un certain nombre de paramètres susceptibles d’aider à la définition de groupes régionaux. Il s’agit d’abord de la morphologie des animaux, puis de données relatives à la pratique de l’élevage. L’examen auquel nous nous sommes livré montre que, pour l’instant, il reste beaucoup de problèmes à régler avant de parvenir à la définition d’éventuelles entités régionales à partir de l’étude des restes animaux. Die Untersuchung der Tierknochen liefert eine Reihe von Parametern, über die eine Definition von regionalen Gruppen möglich scheint. Es handelt sich v.a. um die Morphologie der Tiere einerseits und die Besonderheiten der Viehzucht andererseits. Unsere Unters…
Realism Score for Immersive Virtual Reality Systems and Driving Simulators
2016
International audience; Traditional 2D or 3D quality assessment methods are not sufficient to assess the realism of the outputs of a simulator/immersive virtual reality system. We propose an assessment method based on a scoring system through a new approach. The objective of this paper is to propose a score scale for any simulator or immersive display system that would represent how close to the human visual system the signals that are sent through the display are. Weighted items considered are contrast, acuity, frames per seconds, brightness, field of view and the number of color available.