Search results for "Human-Computer Interaction"
showing 10 items of 605 documents
Implementing a Semantic Catalogue of Geospatial Data.
2014
International audience; Complex spatial analysis requires the combination of heterogeneous datasets. However the identification of a dataset of interest is not a trivial task. Users need to review metadata records in order to select the most suitable datasets. We propose the implementation of a system for metadata management based on semantic web technologies. Our implementation helps the user with the selection task. In this paper, we present a CSW that uses a triplestore as its metadata repository. We implement a translator between Filter Encoding and SPARQL/GeoSPARQL in order to comply to basic OGC standards. Our results are promising however, this is a novel field with room for improvem…
un modèle sémantique spatio-temporel pour capturer la dynamique des environnements
2014
National audience; Les Systèmes d'Information Géographique se sont peu à peu imposés comme des outils performants pour organiser, représenter, analyser et visualiser des données géographiques. Toutefois, l'intégration d'une dimension temporelle dans les SIG reste un défi de la recherche en sciences de l'information géographique. Dès lors, le développement de modèles spatio-temporels adaptés à l'étude de phénomènes géographiques réels devient un enjeu majeur dans la conception de systèmes d'informations dédiés à l'évolution d'entités spatiales. Dans ces travaux, nous proposons un nouveau modèle spatio-temporel basé sur une ontologie intégrant les connaissances des experts sur les données géo…
LC3: un modèle spatial et sémantique pour découvrir la connaissance dans les jeux de données géospatiaux
2015
National audience; Il est nécessaire pour les gérants de territoires d’avoir un aperçu des connaissances actuelles et de l’évolution de certaines caractéristiques de la biosphère. Les outils de télédétection enregistrent une grande quantité d’informations liées à la couverture terrestre permettant l’étude de processus dynamiques. Toutefois, le volume des jeux de données nécessite de nouveaux outils pour identifier des motifs et extraire de la connaissance. Nous proposons un modèle capable de découvrir la connaissance sur des données parcellaires et permettant l’analyse des phénomènes dynamiques à l’aide de données temporelles, spatiales et thématiques. Le modèle est appelé Land Cover Change…
A Semantic analysis of moving objects, using as a case study maritime voyages from eighteenth and nineteenth centuries
2014
International audience; In this paper, we present a spatial model designed to extract knowledge from the tracks of moving objects. The model uses a perdurantism approach, implemented using Semantic Web technologies. In order to show the capabilities of the model, we employ it to handle a large dataset composed of historic maritime records. By using Semantic Web tools, we are able to implement rules and identify user defined patterns. Although there are limitations due to currently available tools, our results are promising.
Semantics for Spatio-temporal "Smart Queries"
2013
International audience; There is a demand to enhance the meaning of objects and their relationships in the geospatial domain.This need has led to a new fi eld of research called geosemantics, which takes advantage of state of art databases and inference mechanism of ontologies. Current geosemantic proposals involve mixed solutions using spatial databases to store geographic objects and a separate ontology to provide semantic capabilities to the system. However making a simple query involves requesting information from both components which is problematic. In our previous work we proposed a functional standalone based architecture, that uses SWRL to solve spatio-temporal problems.In this pap…
LC3 A Spatial-temporal Data Model to Study Qualified Land Cover Changes
2015
International audience; Land cover changes caused by humans have reached points never witnessed in history before. Consequences of these changes are environmental degradation, pollution of water, biodiversity loss and climate change among others. It is in this frame that the interest of the scientific community for this type of events has increased in the last decades. Nowadays, researchers have access to sophisticated monitoring tools and techniques. However, the new threat is that over abundance of information would hide relevant facts and processes. In our research we use data from the CORINE (Coordination of Information on the Environment) program. This program has compiled land cover i…
Using Semantic Web Technologies to Follow the Evolution of Entities in Time and Space
2013
International audience; In this paper we present the "continuum model". Our work follows a "perdurantism" approach and is designed to handle dynamic phenomena extending the 4D-fluent with the use of semantic web technologies. In our approach we represent dynamic entities as constituted by timeslices each with semantic, geometric, temporal and identity components. Our model is able to link the diverse representations of an entity and allows the inference of qualitative information from quantitative one. The inference results are later added to the ontology in order to improve knowledge about the phenomenon. The model has been implemented using OWL and SWRL. Our preliminary results are promis…
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…
Couplage visuo-haptique en environnement de conduite simulée
2012
Our visual-haptic system is requested as soon as our arms interact with our external environment. There is a coupling between visual and haptic modalities, so that the central nervous system takes in account the reliability and accuracy of both modalities in order to weigh their influence in the visual-haptic integration. Thus there is a rebalancing of the weight of each modality in the context of the visual-haptic solicitation. Typically, psychophysical studies implement short and repeated tasks, with or without sensory conflict, to understand the mechanisms underlying the visual-haptic coupling. Applied in our context, this method is excluded because we have to maintain the ecological cha…
Périphérique d'interaction apte à contrôler un élément de toucher et de préhension d'objets virtuels multidimensionnels
2012
Ne pas le transférer sur HAL (déjà déposé sur HAL par le co-auteur (hors ENSAM)) L’invention concerne un périphérique d’interaction (1) apte à contrôler un élément de toucher et de préhension d’objets virtuels multidimensionnels, comportant au moins deux modules d’interaction (20), chaque module d’interaction (20) étant destiné à être actionné par un doigt d’un opérateur et comportant un capteur de commande permettant de commander un déplacement, selon un nombre de degrés de liberté prédéterminé, d’une partie de l’élément de toucher et de préhension d’objets virtuels par déplacement en flexion/extension et/ou adduction/abduction du doigt de l’opérateur, et un vibreur apte à émettre une vibr…