Authoring and Living Next-Generation Location-Based Experiences

Authoring location-based experiences involving multiple participants, collaborating or competing in both indoor and outdoor mixed realities, is extremely complex and bound to serious technical challenges. In this work, we present the first results of the MAGELLAN European project and how these greatly simplify this creative process using novel authoring, augmented reality (AR) and indoor geolocalisation techniques

Interaction Tangible sur Table, définitions et modèles

International audienceIn recent years, tangible user interfaces, which imply interactions performed with one or several objects, gain more and more interest in research in Human-Computer Interaction (HCI). The tangible object represents a subject or an action. It acts on the system, as an action in classical user interfaces (e.g,. GUI). Interaction on a table, which is a common furniture in everyday life and used in multiple activities (desktop, coffee table, kitchen table, etc.), opens a new way for research and development in HCI. In this article, we present definitions, models, and key issues elicited from the literature that enable understanding and reasoning about the couple within an interactive system. Then, we propose a framework that allows to characterize applications supported by the couple in a domain-independent manner.Depuis quelques années les interfaces tangibles impliquant des interactions réalisées via un objet (ou plusieurs) prennent de plus en plus d’importance dans les recherches en interaction homme-machine. L’objet tangible représente un sujet ou une action ; l’objet agit sur le système, telle une action sur une interface « classique ». L’interaction sur table, c’est-à-dire sur un meuble présent dans la vie courante et utilisé à diverses fins (bureau, table à manger, table de salon, table bar, etc.), ouvre un champ nouveau de recherche et de développement. La mise en exergue, issue de l’état de l’art, des définitions, modèles et problématiques, permet d’abord d’appréhender le couple (table, objet tangible) au sein d’un système interactif. Puis, nous proposons un cadre qui permet de positionner des applications mettant en oeuvre le couple (table, objet tangible). Le cadre est décrit de manière à être utilisé pour positionner des applications indépendamment du domaine

Improvised interfaces for real-time musical applications

International audienceComputers offer a wealth of promises for real-time musical control. One of them is to enable musicians to change the structure of their instruments in the same time they are playing them, allowing them to adapt their tools to their wills and needs. Few interaction styles provide enough freedom to achieve this. Improvised interfaces are tangible interfaces made out of found objects and tailored by their users. We propose to take advantage of these improvised interfaces to turn the surrounding physical environment into a dynamic musical instrument with tremendous possibilities. Methods dealing with design issues are presented and an implementation of this novel approach is described

Retour d’expérience sur l’intégration d’une PFT collaborative dans les projets de valorisation du patrimoine

International audience3D simulation has demonstrated the capacity to provide an effective representation of realistic, flexible and relevant architectural environments, of the past, present and future. It is currently possible to fully immerse the stakeholders of one project in the 3D digital mock-up, thanks to virtual reality solutions. However this need to explore the 3D digital mock-up comes within a wider context where the multidisciplinary collaboration is the real critical issue. During this process, sharing and comparing different data formats, 3D as well as 2D or text, is a critical step to improve and to archive the multidisciplinary discussions. For that purpose, we developped a collaborative solution taking advantage of the collaborative and interactive features of multi-touch tables. This device combines visualization of 3D environment and aggregation of additional information. It serves the sharing of expertise with a set of tools enabling anyone to build a common representation. Globale annotation, common visualization and remote control of data are among the objectives behind this contribution. This solution should improve flexibility, quality and completeness of professional exchanges.L’usage de la maquette numérique 3D est aujourd’hui pleinement intégré comme un moyen efficace permettant de visualiser de façon réaliste, flexible et pertinente des environnements architecturaux, passés, présents ou futurs. Il est aujourd’hui possible d’immerger les différents acteurs d’un projet dans cette maquette 3D grâce aux outils de la réalité virtuelle. Cependant ce besoin d’expérimenter la maquette 3D s’inscrit généralement dans un contexte plus large où le processus de collaboration multidisciplinaire est au centre des enjeux. Au cours de ces processus, le partage et la comparaison de différentes données, aussi bien 3D que 2D ou textuelles, est une étape critique pour favoriser et archiver le résultat de ces échanges multidisciplinaires. Confrontés à cette problématique, nous avons développé une solution de collaboration tirant profit des capacités de collaboration et d’interaction offertes par les tables tactiles. En combinant visualisation d’une représentation 3D partagée entre les utilisateurs et capacités d’agrégation des informations complémentaires, cette solution a été conçue et produite afin d’offrir un ensemble d’outils permettant à chacun de participer à la construction d’une représentation commune d’un site.L’annotation globale, la visualisation commune, le contrôle à distance comptent parmi les axes d’optimisation de cette plateforme cherchant à améliorer la flexibilité, la qualité et l’exhaustivité des échanges entre professionnels. D’une manière générale, l’intuitivité et la robustesse ont été mis en exergue afin de s’adresser directement aux professionnels et chercheurs sans nécessiter la présence d’un opérateur, tout en étant un complément efficace aux solutions d’immersion 3D

A Virtual Reality Simulator Based on Haptic Hard Constraints

Part VI: Haptics ApplicationsInternational audienceThis paper presents a real-time physically based platform for multi-sensory interactive simulation. It is centred on high quality dynamic requirements driven by the concept of instrumental interaction and is able to render a wide variety of physical phenomena : from very rigid interactions to large and complex phenomena such pastes or plastic soils. The platform consists in a precisely synchronized multiprocessor architecture extended with a DSP board used for the simulation of very reactive models. It aims for obtain simulation rate necessary for rigid object (1KHz and more) in the context of 6 Degree of Freedom

Modélisation des processus de transport dans les architectures supramoléculaires et les interfaces organiques

L optimisation de cellules solaires organiques repose sur l amélioration de différents paramètres électroniques et structuraux. En particulier, les processus de séparation et de transport de charge doivent être optimisés pour obtenir des rendements élevés. Les processus de séparation de charge dans ces dispositifs s effectuent aux interfaces donneur/accepteur suite à un décalage entre les niveaux électroniques de ces deux matériaux. Suivant leur nature, des interactions aux interfaces peuvent conduire à l apparition d un dipôle pouvant favoriser ou défavoriser la génération de charges libres ; toutefois, l origine de ce dipôle d interface est très mal connue. Ainsi, la première partie de cette thèse s est attaché à une meilleure compréhension de l origine de ce dipôle en appliquant une approche théorique multi-échelle sur un système D/A typique : l interface pentacène/C60. L amélioration des cellules solaires organiques repose également sur l augmentation des longueurs de diffusion d exciton et de la mobilité des porteurs de charge dans les couches actives. Ainsi, l extension de l ordre structural au sein d une hétérojonction constituée de deux cristaux liquides colonnaires électroniquement complémentaires pourrait aider à améliorer ces paramètres. En deuxième partie, nous avons donc analysé l impact du désordre structural présent au sein d un auto-assemblage monodimensionnel de perylène diimide sur les paramètres électroniques gouvernant le transport de charge en couplant des calculs de dynamique moléculaire à des calculs de chimie quantique. Les mobilités des porteurs de charge ont été estimées en simulant des mesures de mobilité en temps de vol calculées dans le cadre du formalisme de Marcus puis comparées à l expérience. Des résultats préliminaires issus de simulations de dynamique moléculaire sur une hétérojonction entre deux cristaux liquides électroniquement complémentaire récemment synthétisés ont été reportés en dernière partie.The development of efficient organic solar cells relies on the optimization of different correlated electronic and structural parameters. In particular, efficient charge separation and charge transport processes are essential to get high conversion yields. The charge separation processes in these devices occur at the donor/acceptor interfaces due to the energetic mismatch between the electronic structures of the two materials. Depending on the nature of these materials, interfacial interactions may lead to the appearance of a significant dipole that can help or disadvantage the generation of free charges. However, the origin of this interface dipole is still unclear. Thus, the first part of this thesis presents a multiscale theoretical approach to address the origin of the interface dipole at a prototypical D/A interface: the pentacene/C60 interface. Improving of the conversion efficiency of organic solar cells also relies on the increase of both the exciton diffusion length and of the charge carrier mobilities. For this purpose, a possible route is to expand the structural order inside the heterojunction via the self-organization of two electronically complementary columnar liquid crystals. This point is investigated in the second part of this thesis. First, we address the impact of the structural disorder on the electronic parameters mediating the charge transport properties in a one-dimensional self-assembly of perylene diimides by coupling molecular dynamics simulations to quantum-chemical calculations. The charge carrier mobilities are evaluated by means of time-of-flight numerical simulations in the framework of the Marcus formalism and compared to the experience. Then, we present preliminary results issued from atomistic molecular dynamics simulations on the heterojunction between two recently synthesized electronically complementary discotic liquid crystals.BORDEAUX1-Bib.electronique (335229901) / SudocSudocFranceF

'GXtar' : an interface using guitar techniques

National audienc

Guide to Brain-Computer Music Interfacing

XVIII, 313 p. 103 illus.online resource

Ergotic Sounds : A New Way to Improve Playability, Believability and Presence of Virtual Musical Instruments

Special issue: Enaction and MusicInternational audienceWe explore how an 'ergotic gesture-sound situation' is a genuine way to improve the playability, believability and presence of virtual musical instruments. An ergotic gesture-sound situation is a situation where the instrumental gesture and the sound produced are intimately energetically linked. We perform two sets of experiments: the first aims at identifying the respective role of haptic and auditory perceptions in recognition of a virtual object, here a virtual bowed string; the second aims at evaluating the role of haptic and auditory perceptions with respect to action, in the achievement of a difficult musical task. The musical goal consists in maintaining the continuity of sound when changing bow direction. The first experiments are subjective experiments. They show that the feeling of presence of the bowed string is strongly reinforced when sounds and gestural friction are intimately linked, as is the case when the vibrations of the string are returned to the fingers. The second are subjective and objective experiments. They show that achieving the goal is significantly improved by instrumental force feedback. Further, they show that the main property of subjects' performance with the virtual bowed string is fast adaptive dynamic learning due to the physical relation between action plus gesture perception and auditory perception, and that playing and embodiment are notably improved by a strong physical haptic resistance

Improvised interfaces for real-time musical applications

International audienceComputers offer a wealth of promises for real-time musical control. One of them is to enable musicians to change the structure of their instruments in the same time they are playing them, allowing them to adapt their tools to their wills and needs. Few interaction styles provide enough freedom to achieve this. Improvised interfaces are tangible interfaces made out of found objects and tailored by their users. We propose to take advantage of these improvised interfaces to turn the surrounding physical environment into a dynamic musical instrument with tremendous possibilities. Methods dealing with design issues are presented and an implementation of this novel approach is described