Search results for " Virtue"
showing 10 items of 109 documents
Traffic congestion reduction based on vehicle platoons and intelligent crossroads interactions
2021
Intersections are at the core of urban congestion. For more than a decade, new approaches based on autonomous and connected driving have been proposed. They aim to improve the performance of traffic control at intersections, by harnessing connectivity and driving automation (longitudinal control). These approaches have in common the fact that vehicles can negotiate together their right of way to use the conflicting space. However, they are different in terms of the way they share the space and optimization techniques. The challenge is to define the sequence of access of vehicles to the common space (which one goes first, which is the second, and so on) and the speed profile of vehicles to a…
Dispositif virtuel d'aide à la chirurgie de l'épaule
2008
The goal of this research is to design a virtual reality prototype to assit an orthopedic surgeon during the replacement of the glenohumeral joint by prosthesis. This system aims to optimize the movements of prosthesized shoulder joint from a choice of various scenarios of pose. These works encompasses several topics such as : orthopedic surgery, image analysis, computer graphics and virtual reality. The chosen process includes a phase of modelling of the bony part of the articulation by simple geometric forms, this model is parameterized from radios or CT scans ; a phase of simulation of the movements of healthy glenohumeral joint ; nally the phase of simulation of cutting and drilling wit…
Interaction peripheral device capable of controlling an element for touching and grasping multidimensional virtual objects
2015
An interaction peripheral device capable of controlling an element for touching and grasping multidimensional virtual objects, including at least two interaction modules, each interaction module being intended to be actuated by a finger of an operator and including a control sensor allowing control of displacement, according to a predetermined number of degrees of freedom, of a portion of the element for touching and grasping virtual objects by bending/extending and/or adduction/abduction displacement of the finger of the operator, and a vibrator able to emit a vibration upon touching and/or letting go of a virtual object by a portion of said element for touching and grasping virtual object…
A predictive approach for a real-time remote visualization of large meshes
2012
Déjà sur HAL; Remote access to large meshes is the subject of studies since several years. We propose in this paper a contribution to the problem of remote mesh viewing. We work on triangular meshes. After a study of existing methods of remote viewing, we propose a visualization approach based on a client-server architecture, in which almost all operations are performed on the server. Our approach includes three main steps: a first step of partitioning the original mesh, generating several fragments of the original mesh that can be supported by the supposed smaller Transfer Control Protocol (TCP) window size of the network, a second step called pre-simplification of the mesh partitioned, ge…
Artificial Potential Field Simulation Framework for Semi-Autonomous Car Conception
2017
International audience; Artificial potential field is investigated to provide a high level of synergy between driver and semi-autonomous vehicle. This article presents a framework developed to test the performances of this approach. Stand-alone performances of this system is tested for a lane keeping and cruise control application. Performances are promising and future development is discussed.
Quelle efficacité d’une gestion à une échelle paysagère large des abondances locales d’adventices? Une approche de modélisation à l’échelle du paysage
2019
Prod 2019-15n SPE GESTAD INRA; National audience; Compte tenu de la dispersion des graines à des échelles plus larges que la parcelle, prendre en compte l’échelle du paysage est un levier d’action potentiel pour une gestion durable de la flore adventice. A l’aide d’un modèle de dynamique spatiale des adventices, nous avons traité la question : est-il possible de réduire les abondances locales d’adventices dans les cultures annuelles en introduisant dans les paysages des prairies permanentes, habitats défavorables aux adventices annuelles. Dans les paysages avec beaucoup de prairies permanentes, les densités de graines dans les cultures annuelles étaient plus faibles que dans des paysages av…
Effet d'un affichage environnemental sur les choix alimentaires des consommateurs : essai contrôlé randomisé dans un supermarché en réalité virtuelle
2021
National audience
« A propos d’un paysage urbain », Journée d’études « Paysages en Mouvement », Université Paul Valéry, 17 juin 2022.
2022
Présentation d'une application de RV.
De l’histoire romancée à l’histoire virtuelle
2020
International audience
L’apprentissage en environnement virtuel : rôle du guidage et du feedback sur la compréhension des écosystèmes forestiers
2021
As part of the E-Fran project, we studied cognitive processes related to learning in order to optimize a virtual reality forest simulator. This thesis work resulted in four experiments involving a test of multimedia learning principles (Mayer, 2009, 2014,2021) in virtual reality, as well as the cognitive mechanisms underlying acquisitions in the forest ecosystem domain. Our first study focused on learning about the decomposition of organic matter with over 100 5th grade students. We created a 3D environment respecting the principle of semantic coherence in order to compare two groups of students who studied either the lesson according to a fixed semantically coherent presentation or the les…