122 research outputs found
SIXIĂME ATELIER : ReprĂ©sentation et raisonnement sur le temps et l'espace (RTE 2011)
Actes de l'atelier RTE 2011, Plate-forme AFIA, ChambĂ©ryNational audienceLa reprĂ©sentation du temps et de l'espace ainsi que les modĂšles de raisonnements associĂ©s sont des thĂšmes largement Ă©tudiĂ©s en informatique, d'une maniĂšre gĂ©nĂ©rale, et en intelligence artificielle, en particulier. Ces thĂšmes sont de plus en plus importants dans de nombreux domaines de notre sociĂ©tĂ©, en particulier lĂ oĂč est disponible une trĂšs grande quantitĂ© d'informations et de services Ă©voluant au cours du temps ou dans l'espace. Les techniques temporelles et/ou spatiales sont, par exemple, importantes dans : la gestion des grandes quantitĂ©s de donnĂ©es, l'analyse et la fouille de ces donnĂ©es, la simulation et l'analyse de l'Ă©volution temporelle de processus, l'Ă©valuation de la sĂ©curitĂ© et la sĂ»retĂ©, la gestion dynamique des connaissances, la gestion de l'espace, la prĂ©vention des risques naturels, la modĂ©lisation des systĂšmes dynamiques et complexes, etc. Elles offrent une alternative ou un complĂ©ment aux mĂ©thodes statistiques et mathĂ©matiques de modĂ©lisation de l'espace et du temps
Adaptation de documents multimédia : Approche sémantique de la dimension spatiotemporelle des documents SMIL
MĂ©moire de mastĂšre d'informatique, UniversitĂ© Joseph Fourier-INPG, Grenoble (FR) - laborie2004aL'essor du multimĂ©dia permet le dĂ©veloppement de nombreuses applications mariant les technologies de l'Ă©crit, de l'image et du son. D'autre part, les rĂ©centes avancĂ©es technologiques permettent aux documents multimĂ©dia d'ĂȘtre prĂ©sent sur de nombreuses plates-formes (tĂ©lĂ©phones portables, PDA, ordinateurs de bureau...). Cette diversification des utilisations et des supports a entraĂźnĂ© un besoin d'adaptation des documents Ă leur contexte d'exĂ©cution. Pour assurer la proximitĂ© entre un document adaptĂ© et son document source, une approche sĂ©mantique a Ă©tĂ© dĂ©veloppĂ©e Ă partir de spĂ©cifications qualitatives des documents multimĂ©dia. Notre travail consiste Ă Ă©tendre cette approche Ă un langage exĂ©cutable de documents : SMIL. Un document SMIL ne pouvant ĂȘtre directement adaptĂ© avec l'approche proposĂ©e, nous introduisons diverses transformations des spĂ©cifications de documents en SMIL vers des descriptions qualitatives dont nous montrons quĂelles assurent la propriĂ©tĂ© de neutralitĂ©. De plus, l'approche sĂ©mantique ayant Ă©tĂ© initialement appliquĂ©e uniquement Ă la dimension temporelle, nous l'appliquons par la suite Ă la dimension spatio-temporelle des documents SMIL. Enfin, nous raffinons les mesures de proximitĂ© Ă l'aide de graphes de voisinage adaptĂ©s au type d'objets multimĂ©dia manipulĂ©s ainsi qu'au type de langage de spĂ©cification utilisĂ©
On using generic profiles and views for dynamic web services adaptation
International audienceThe emergence of mobile technologies allows users to be connected to services anytime, anywhere and anyhow. However, this mobility requires new constraints on the execution of the services and their presentations to users. Hence, these ones must be selected and adapted according to not only the user's profile but also his context. In this paper, we present a new context-aware adaptation architecture based on Web Services, named CA-WIS. Our proposal aims users to interact with web services that correspond to their needs and their contexts
Semantic adaptation of multimedia documents
laborie2011aInternational audienceMultimedia documents have to be played on multiple device types. Hence, usage and platform diversity requires document adaptation according to execution contexts, not generally predictable at design time. In an earlier work, a semantic framework for multimedia document adaptation was proposed. In this framework, a multimedia document is interpreted as a set of potential executions corresponding to the author specification. To each target device corresponds a set of possible executions complying with the device constraints. In this context, adapting requires to select an execution that satisfies the target device constraints and which is as close as possible from the initial composition. This theoretical adaptation framework does not specifically consider the main multimedia document dimensions, i.e., temporal, spatial and hypermedia. In this paper, we propose a concrete application of this framework on standard multimedia documents. For that purpose, we first define an abstract structure that captures the spatio-temporal and hypermedia dimensions of multimedia documents, and we develop an adaptation algorithm which transforms in a minimal way such a structure according to device constraints. Then, we show how this can be used for adapting concrete multimedia documents in SMIL through converting the documents in the abstract structure, using the adaptation algorithm, and converting it back in SMIL. This can be used for other document formats without modifying the adaptation algorithm
Semantic multimedia document adaptation with functional annotations
laborie2009aInternational audienceThe diversity of presentation contexts (such as mobile phones, PDAs) for multimedia documents requires the adaptation of document specifications. In an earlier work, we have proposed a semantic adaptation framework for multimedia documents. This framework captures the semantics of the document composition and transforms the relations between multimedia objects according to adaptation constraints. In this paper, we show that capturing only the document composition for adaptation is unsatisfactory because it leads to a limited form of adapted solutions. Hence, we propose to guide adaptation with functional annotations, i.e., annotations related to multimedia objects which express a function in the document. In order to validate this framework, we propose to use RDF descriptions from SMIL documents and adapt such documents with our interactive adaptation prototype
Toward a Context-Aware and Automatic Evaluation of Elderly Dependency in Smart Homes and Cities
International audienceIn this work, we propose a framework for automatic dependency evaluation that can notify the changes of the elderly dependency, hence providing persons with required services in time. In order to validate our approach, we target the French dependent population. Especially, we focus our proposal on the AGGIR dependency model used in the French medical field. Our objective is to provide a flexible architecture and an extensible model linked to opened data that can refer to a wide variety of services (hardware sensors and software; simple or composed services)
Création et utilisation d'un résumé de métadonnées pour interroger efficacement des collections multimédias distribuées
National audienceActuellement, de nombreux contenus multimĂ©dias sont crĂ©Ă©s Ă partir de plusieurs sources et stockĂ©s dans des environnements distribuĂ©s. Pour Ă©viter de centraliser l'ensemble des mĂ©tadonnĂ©es d'un systĂšme et rĂ©pondre efficacement Ă une requĂȘte d'un utilisateur, nous proposons d'engendrer et d'utiliser un rĂ©sumĂ© de mĂ©tadonnĂ©es. Ce dernier aura pour fonction de localiser certaines unitĂ©s de stockage qui contiennent les donnĂ©es multimĂ©dias dĂ©sirĂ©es. L'originalitĂ© de ce rĂ©sumĂ© rĂ©side en le fait qu'il soit construit automatiquement sur la base des mĂ©tadonnĂ©es extraites durant l'indexation. Dans cet article, nous montrons comment construire un tel rĂ©sumĂ© et illustrons notre approche au moyen de technologies issues du Web SĂ©mantique, telles que RDF et SPARQL pour reprĂ©senter et interroger des mĂ©tadonnĂ©es sĂ©mantiquement dĂ©finies
Adaptation spatiale efficace de documents SMIL
10 pagesLa multiplication des supports de présentation multimédia entraßne un besoin d'adaptation des documents à leur contexte d'exécution. Nous avons proposé une approche sémantique d'adaptation de documents multimédia qui a été temporellement définie à l'aide de l'algÚbre d'intervalles d'Allen. Cet article étend ces précédents travaux à la dimension spatiale des documents SMIL. Notre objectif est de trouver une représentation spatiale qualitative permettant de calculer un ensemble de solutions d'adaptation proche du document initial. La qualité d'une adaptation se mesure à deux niveaux : expressivité des solutions d'adaptation et rapidité de calcul. Dans ce contexte, nous caractérisons la qualité de l'adaptation selon plusieurs types de représentations spatiales existantes. Nous montrons que ces représentations ne permettent pas d'avoir une qualité d'adaptation optimale. Nous proposons alors une nouvelle représentation spatiale suffisamment expressive permettant d'adapter rapidement des documents multimédia SMIL
Towards an Integrated Full-Stack Green Software Development Methodology
Existing green/eco responsible approaches for IT are frequently domain-specific and very focused on one topic. For example, some works are focused on saving energy with better virtual machine management on cloud infrastructures or data management in wireless sensor networks, in order to minimize the data transfers and sensorsâ wakeups. Nevertheless, they consider only limited aspects in the whole software development process; indeed, very few researches propose a global approach. In this context, we envision a green development methodology that approaches energy saving aspects from the design phase and at all the system layers (software, hardware, user requirements, execution contexts, etc.), which can provide positive leverage as well as avoid side effects (one decision can be positive at one system layer but may trigger negative impact on other layers). We motivate the interest of this vision and describe key ideas regarding how to address these considerations in the development methodology
Multimedia document summarization based on a semantic adaptation framework
Qualitative representation and reasoning ; SMIL documentsInternational audienceThe multiplication of presentation contexts (such as mobile phones, PDAs) for multimedia documents requires the adaptation of document specifications. In an earlier work, a semantic framework for multimedia document adaptation was proposed. This framework deals with the semantics of the document composition by transforming the relations between multimedia objects. However, it was lacking the capability of suppressing multimedia objects. In this paper, we extend the proposed adaptation with this capability. Thanks to this extension, we present a method for summarizing multimedia documents. Moreover, when multimedia objects are removed, the resulted document satisfies some properties such as presentation contiguity. To validate our framework, we adapt standard multimedia documents such as SMIL documents
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