Nizar Ghoula

Une ontologie de techniques de visualisation d'informations : application aux modèles urbains 3D enrichis

Une ontologie de techniques de visualisation d'informations: application auxmo eles urbains 3D enrichis

HAL (Le Centre pour la Communication Scientifique Directe), Jul 1, 2013

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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A Meta-model and Ontology for Managing Heterogenous Alignment Resources

2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT), Nov 1, 2013

Since the invention of the Semantic Web concept, the number of ontological and terminological res... more Since the invention of the Semantic Web concept, the number of ontological and terminological resources on the Web has been increasing. These heterogeneous resources may share entities or contain similar ones. To cope with the diversity of these resources and collect them, resources repositories have been created. Matching entities belonging to different resources is then required to use or combine them, which generates alignment resources. Thus, collecting and managing resulting alignments is useful in order to compose them, compare sets of alignments for the same input resources, enrich existing alignments from each other or enhance their quality. In this paper we introduce our approach for building a repository of heterogeneous alignments. We propose to represent alignments by means of a generic model and we introduce some operators and algorithms to import, compose, intersect and merge alignments. For a concrete application we use ontology alignments and parallel corpora.

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A Repository of Information Visualization Techniques to Support the Design of 3D Virtual City Models

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Sep 13, 2013

Virtual 3D city models are used for different applications such as urban planning, navigation, pe... more Virtual 3D city models are used for different applications such as urban planning, navigation, pedestrian behaviour, historical information, and disaster management. These applications require rich information models that associate urban objects not only with their geometric properties but also with other types of information. When designing such models the choice of visualization techniques is far from trivial because the city objects must be displayed together with additional information, such as historical facts, planning projects, pollutant concentration, noise level, etc. Finding relevant techniques depends on a set of criteria such as the type of information, but also on the tasks that will be performed and the associated context. Furthermore, a technique that is relevant when used in isolation may generate visual incompatibilities when used in conjunction with another one. We have defined a model for the representation of information visualization techniques in 3D city models. We have implemented this model in the form of an ontology and a knowledge base of techniques currently used in 3D city models or 3D GIS. The goal of such an approach is to provide a knowledge repository to support the design of 3D virtual city models in which non-geometric information must be presented. In this paper we describe the model and the ontology of information visualization techniques that we designed. We also show how the associated knowledge base can be used for the selection of visualization techniques depending on different criteria including task and context, and for the detection of visual incompatibilities between techniques when used in the same scene.

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Conference Presentation Reference

Opérateurs de gestion des alignements de ressources de connaissances hétérogènes GHOULA, Nizar, N... more Opérateurs de gestion des alignements de ressources de connaissances hétérogènes GHOULA, Nizar, NINDANGA, Hervé, FALQUET, Gilles Les applications du Web sémantique utilisent et produisent un grand nombre de ressources terminoontologiques.Malgré l'hétérogénéité de ces ressources, elles peuvent partager ou importer des mêmes entités(concepts, termes, individus,...). Idéalement, ces ressources doivent être alignées afin de pouvoir reformuler desrequêtes pour mieux exploiter le contenu du Web sémantique. Par conséquence, il est nécessaire de créer et degérer des grandes quantités d'alignements entre des ressources de connaissances. Peu de systèmes permettentd'offrir la possibilité de gérer des alignements. De ce fait, nous abordons cette problématique indépendammentdu type des ressources alignées ou du formalisme d'alignement utilisé. Cet article présente une approche de gestionde ressources d'alignements basée sur un modèle ontologique et un ensemble d'opé...

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Méthodologie de construction d'outil d'aide à la décision pour le choix de techniques d... more

Exchanges Documents Extraction Languages Web Ergonomics Interaction Semantics Servers

Other Grants and Activities - European Actions

New Results - Annotation of Information Resources

Une ontologie de techniques de visualisation d'informations: application aux modèles urbains 3D enrichis

De plus en plus d'environnements virtuels 3D servent à présenter des informations qui n'o... more De plus en plus d'environnements virtuels 3D servent à présenter des informations qui n'ont pas de représentation directe sous forme d'objets géométriques (textes, données numériques) et pour lesquelles une technique de visualisation appropriée doit être utilisée. C'est le cas notamment des modèles urbains 3D enrichis qui contiennent non seulement des objets géométriques (tels que des bâtiments) mais aussi des données sur la qualité de l'air, le bruit, la visibilité en un lieu, le comportement des piétons, etc. Il est clair que le choix des techniques de visualisation de ces données peut influer de manière importante sur l'utilisabilité d'un tel environnement. Dans cet article, nous proposons une représentation formelle de techniques de visualisation 3D sous la forme d'une ontologie de référence qui sera partagée et enrichie par les retours d'expérience de ses utilisateurs. Le but de cette ontologie est de servir de référentiel de connaissances po...

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AlignManager SoWeDo

O3DVT

A Meta-model and Ontology for Managing Heterogenous Alignment Resources

2013 IEEE/WIC/ACM International Joint Conferences on Web Intelligence (WI) and Intelligent Agent Technologies (IAT), 2013

Since the invention of the Semantic Web concept, the number of ontological and terminological res... more Since the invention of the Semantic Web concept, the number of ontological and terminological resources on the Web has been increasing. These heterogeneous resources may share entities or contain similar ones. To cope with the diversity of these resources and collect them, resources repositories have been created. Matching entities belonging to different resources is then required to use or combine them, which generates alignment resources. Thus, collecting and managing resulting alignments is useful in order to compose them, compare sets of alignments for the same input resources, enrich existing alignments from each other or enhance their quality. In this paper we introduce our approach for building a repository of heterogeneous alignments. We propose to represent alignments by means of a generic model and we introduce some operators and algorithms to import, compose, intersect and merge alignments. For a concrete application we use ontology alignments and parallel corpora.

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A Repository of Information Visualization Techniques to Support the Design of 3D Virtual City Models

Lecture Notes in Geoinformation and Cartography, 2014

Virtual 3D city models are used for different applications such as urban planning, navigation, pe... more Virtual 3D city models are used for different applications such as urban planning, navigation, pedestrian behaviour, historical information, and disaster management. These applications require rich information models that associate urban objects not only with their geometric properties but also with other types of information. When designing such models the choice of visualization techniques is far from trivial because the city objects must be displayed together with additional information, such as historical facts, planning projects, pollutant concentration, noise level, etc. Finding relevant techniques depends on a set of criteria such as the type of information, but also on the tasks that will be performed and the associated context. Furthermore, a technique that is relevant when used in isolation may generate visual incompatibilities when used in conjunction with another one. We have defined a model for the representation of information visualization techniques in 3D city models. We have implemented this model in the form of an ontology and a knowledge base of techniques currently used in 3D city models or 3D GIS. The goal of such an approach is to provide a knowledge repository to support the design of 3D virtual city models in which non-geometric information must be presented. In this paper we describe the model and the ontology of information visualization techniques that we designed. We also show how the associated knowledge base can be used for the selection of visualization techniques depending on different criteria including task and context, and for the detection of visual incompatibilities between techniques when used in the same scene.

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An ontology of 3D visualization techniques for enriched 3D city models

Usage, Usability, and Utility of 3D City Models – European COST Action TU0801, 2012

Models, which represent in 3 dimensions the geometric elements of a city, are called 3D city mode... more Models, which represent in 3 dimensions the geometric elements of a city, are called 3D city models. Those models are used for an intended wide range of applications beyond mere visualization. Such uses are made possible by enriching the geometrical aspects with urban or environmental data that cannot be perceptible to a user without a visual abstraction. Using such models implies interacting with them in order to perform specific tasks related to the visualized data. Those data are potentially heterogeneous in terms of types, scales, issues, etc. When creating an enriched 3D city model, the designer faces the problem of choosing the most relevant visualization techniques for those heterogeneous data that have to be displayed within the same scene. In this paper we address the problem related to the visualization of enriched 3D city models by proposing a formal representation of existing visualization techniques in the form of an ontology of 3D visualization techniques. We also show how this ontology can be used for computational reasoning and help for the selection of visualization techniques by checking if a technique is compatible with a dataset to display or to a technique already selected and used in the same scene. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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TOK: Un modèle d’entrepôt de ressources linguistiques, terminologiques et ontologiques

Résumé: Des dictionnaires multilingues, des ontologies générales ou de domaine, des thesaurus de ... more Résumé: Des dictionnaires multilingues, des ontologies générales ou de domaine, des thesaurus de termes, et d'autres ressources de même type sont construites ou réutilisées pour la gestion de connaissances. Ces ressources sont de natures hétérogènes et ont des modèles différents. La manipulation, l'intégration et la mise en correspondance de ces ressources sont difficiles en raison de la différence au niveau de la représentation. Dans le but de faciliter l'usage des ressources de connaissances et leurs combinaisons, nous ...

Session details: OD4LS'16

It is our great pleasure to welcome you to the 1st Workshop on Open Data for Local Search, associ... more It is our great pleasure to welcome you to the 1st Workshop on Open Data for Local Search, associated with WWW 2016. Local search engines are specialized information retrieval systems enabling users to discover amenities and services in their neighborhood (schools, businesses, hospitals, etc.). Developing a local search system still raises scientific questions, as well as very specific technical issues. One of the main problems encountered is the partial availability or even the absence of informative contents related to local actors, merchants or service providers. Introducing open data in the architecture of local search engines supports the identification and collection of structured content. Collaborative data such as those made available by the OpenStreetMap Foundation can be of help to identify new dealers, and improve their geolocation. Semantic Web resources such as DBpedia contain keywords or content for enriching ontologies associated with a local search service. Open data...

Méthodologie de construction d'outil d'aide à la décision pour le choix de techniques d'alignement à travers les évaluations

Gestion des méthodologies d'alignement à travers les évaluations Méthodologie de construction d'o... more

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Terminology Management : New Perspectives

These tools can be integrated with several Electronic Document Management Systems (EDMS) or with ... more These tools can be integrated with several Electronic Document Management Systems (EDMS) or with search engines. Despite the existence of a considerable number of open source tools in the CAT field, these tools remain complex and their integration incomplete. Thus, they do not meet the complete chain of needs commonly expressed by Translation Services and Language Service Providers. Additionally, they generally don't benefit from a robust distribution and support structure and some of them are not really scalable.

Terminology management revisited

Large repositories publishing and sharing terminological, ontological and linguistic resources ar... more Large repositories publishing and sharing terminological, ontological and linguistic resources are available to support the development and use of translation. However, despite the availability of language resources within online repositories, some natural languages associations cannot be found (rare languages or non-common combinations, etc.). Consequently, multiple tools for composing linguistic and terminological resources offer the possibility to create missing language associations. These generated resources need to be validated in order to be effectively used. Manually checking these resources is a tedious task and in some cases hardly possible due to the large amount of entities and associations to go through or due to the lack of expertise in both languages. To solve this matter and generate sound and safe content, tools are needed to automatically validate and filter associations that make no sense. Hence, a validation tool is based itself on external resources such as para...

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