Browsing by Author "Sadallah, Madjid"

Now showing 1 - 17 of 17
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    A flexible distance for the spatial placement in a multimedia document
    (Institute of Electrical and Electronics Engineers ( IEEE ), 2008-04-07) Maredj, Azze-Eddine; Tonkin, Nourredine; Sadallah, Madjid; Alimazighi, Zaia
    In the multimedia documents authoring systems the management of spatial and temporal inter-objects relations is the most delicate task. Spatial relations management refers to the appropriate means to express relations between the document objects and guarantee their consistency. Usually it is represented by spatial model which performances depend on its expressivity degree, on its positioning precision and on the ability to express a desired overlap. One of the most important factor that affects performnaces is the distance associated to the relations. To enhance the expressivity and precision degrees and to allow the specification of desired overlap, we introduce, in this paper, the flexible distance concept.
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    A Framework for Usage-based Document Reengineering
    (ACM New York, NY, USA, 2013-09) Sadallah, Madjid; Encelle, Benoît; Maredj, Azze-Eddine; Prié, Yannick
    This ongoing work investigates usage-based document reengineering as a means to support authors in modifying their documents. Document usages (i.e. usage feedbacks) cover readers' explicit annotations and their reading traces. We first describe a conceptual framework with various levels of assistance for document reengineering: indications on reading, problem detection, reconception suggestions and automatic reconception propositions, taking our example in e-learning document management. We then present a technical framework for usage-based document reengineering and its associated models for documents, annotations and traces representation.
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    A spatial model for editing multimedia documents
    (CERIST, 2010-09) Tonkin, Nourredine; Maredj, Azze-Eddine; Sadallah, Madjid
    In the multimedia documents authoring systems the management of spatial and temporal inter-objects relations is the most delicate task. Spatial relations management refers to the appropriate means to express relations between the document objects and guarantee their consistency. Usually it is represented by spatial model which performances depend on its expressivity degree, on its positioning precision and on the ability to express a desired overlap. One of the most important factors that affect performances is the distance associated to the relations. To enhance the expressivity and precision degrees and to allow the specification of desired overlap, we introduce, in this paper, the flexible distance concept.
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    A spatial model for editing multimedia documents
    (2010-10-18) Maredj, Azze-Eddine; Tonkin, Nourredine; Sadallah, Madjid
    Dans le domaine de l’édition et de documents multimédia, la gestion du placement spatial des objets constitue un des points le plus délicats dans la conception de documents. Il s'agit de pouvoir exprimer les relations spatiales entre les objets et de garantir leur cohérence. Cette gestion est représentée par un modèle dont les performances se mesurent par sa puissance d’expressivité, sa précision de placement et par la spécification du recouvrement désiré. Un des éléments déterminant dans les performances d’un modèle spatial est la distance associée aux relations. Dans cet article, nous présentons une nouvelle définition de la distance qui donne un grand degré d’expressivité et de précision aux relations et permet la spécification du recouvrement désiré dans un document multimédia.
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    CHM: an annotation-and component-based hypervideo model for the Web
    (Springer Verlag, 2012-07-21) Sadallah, Madjid; Aubert, Olivier; Prié, Yannick
    Hypervideos are hypermedia documents that focus on video content. While they have long been deployed using specialized software or even hardware, the Web now offers a ground for them to fit into standardized languages and implementations. However, hypervideo design also currently uses very specific models limited to a single class of documents, or very generic hypermedia models that may not appropriately express their specific features. In this article we describe such features, and we introduce CHM, an annotation-driven and component-based model to conceptualize hypervideos through a high level operational specification. An extensible set of high level components is defined to emphasize the presentation and interaction features modeling, while lower level components offer more flexibility and customization opportunities. Being annotation-based, the model promotes a clear separation between video content/metadata and their various potential presentations. We also describe WebCHM, an implementation of CHM with standard Web technologies that provides a general framework to experiment with hypervideos on the Web. Two examples are provided as well as a preliminary usage study of the model and its implementation to validate our claims and proposals.
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    Component-based hypervideo model: high-level operational specification of hypervideos
    (ACM New York, NY, USA, 2011) Sadallah, Madjid; Aubert, Olivier; Prié, Yannick
    Hypervideo offers enhanced video-centric experiences. Usually defined from a hypermedia perspective, the lack of a dedicated specification hampers hypervideo domain and concepts from being broadly investigated. This article proposes a specialized hypervideo model that addresses hypervideo specificities. Following the principles of component-based modeling and annotation-driven content abstracting, the Component-based Hypervideo Model (CHM) that we propose is a high level representation of hypervideos that intends to provide a general and dedicated hypervideo data model. Considered as a video-centric interactive document, the CHM hypervideo presentation and interaction features are expressed through a high level operational specification. Our annotation-driven approach promotes a clear separation of data from video content and document visualizations. The model serves as a basis for a Web-oriented implementation that provides a declarative syntax and accompanying tools for hypervideo document design in a Web standards-compliant manner.
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    Component-based Hypervideo Model: high-level operational specification of hypervideos
    (CERIST, 2011-06) Sadallah, Madjid; Aubert, Olivier; Prié, Yannick
    Hypervideo offers enhanced video-centric experiences with attractive and powerful features. Usually defined from a hypermedia perspective, the lack for a dedicated specification prevents hypervideo domain and concepts from being broadly investigated. This article proposes a formal hyper¬video model beyond conventional and very general ones. Followingtheprinciples of component-based modeling and annotation-driven content abstracting, CHM – the proposed Component-based Hypervideo Model - is a high level rep-resentation of hypervideos that intends to expose a gen¬eral, easy to use, comprehensive, expressive, intuitive and dedicated hypervideo data model. Considered as a video-¬centric interactive document, the CHM hypervideo presen¬tation and interaction features are emphasized throughhigh level document operational specification. Our annotation¬-driven approach promotes a clear separation of data from video content and document visualizations. The model serves as a basis for a Web-oriented implementation that provides a declarative syntax and accompanying tools for hypervideo documents design in a simple yet powerful and Web standards¬ compliant manner.
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    Extension of the Wahl-Rothermel temporal model for the multimedia documents
    (2007-04-12) Maredj, Azze-Eddine; Alimazighi, Zaia; Sadallah, Madjid
    Multimedia presentation defines composition of different media having inherent or assigned temporal behavior: text, images, animations, audio and video. Temporal composition is the most important feature of multimedia presentations because it defines the overall scheduling of temporal events. In this paper, our goal is to propose an extension of Whal and Rothermel temporal model to increase its degree of expressiveness. For that, a new delay definition is proposed.
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    Hypervideo and Annotations on the Web
    (IEEE Computer Society Washington, DC, USA, 2011-09-08) Sadallah, Madjid; Aubert, Olivier; Prié, Yannick
    Effective video-based Web information system deployment is still challenging, while the recent widespread of multimedia further raises the demand for new online audiovisual document edition and presentation alternatives. Hyper video, a specialization of hypermedia focusing on video, can be used on the Web to provide a basis for video-centric documents and to allow more elaborated practices of online video. In this paper, we propose an annotation-driven model to conceptualize hyper videos, promoting a clear separation between video content/metadata and their various potential presentations. Using the proposed model, features of hyper video are grafted to wider video-based Web documents in a Web standards-compliant manner. The annotation-driven hyper video model and its implementation offer a general framework to experiment with new interaction modalities for video-based knowledge communication on the Web.
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    Leveraging Learners' Activity Logs for Course Reading Analytics Using Session-Based Indicators
    (Inderscience, 2019) Sadallah, Madjid; Encelle, Benoît; Maredj, Azze-Eddine; Prié, Yannick
    A challenge that course authors face when reviewing their contents is to detect how to improve their courses in order to meet the expectations of their learners. In this paper, we propose an analytical approach that exploits learners' logs of reading to provide authors with insightful data about the consumption of their courses. We first model reading activity using the concept of reading-session and propose a new and efficient session identification. We then elaborate a list of indicators computed using learners' reading sessions that allow to represent their behaviour and to infer their needs. We evaluate our proposals with course authors and learners using logs from a major e-learning platform. Interesting results were found. This demonstrates the effectiveness of the approach in identifying aspects and parts of a course that may prevent it from being easily read and understood, and for guiding the authors through the analysis and review tasks.
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    MediaStudio : Un système d’édition et de présentation de documents multimédia interactifs
    (CERIST, 2010) Maredj, Azze-Eddine; Sadallah, Madjid; Tonkin, Nourredine
    In the actual standards and multimedia systems, the documents are often written in an event based approach which makes the programming techniques not adapted to the incremental edition process. The documents maintenance has become very hard and very expensive and the construction of such documents is not adapted to the non-computer scientist users. Moreover, works done in this field have mainly focused on the temporal dimension while the development of such systems should consider all the multimedia document dimensions (temporal, spatial, structural and hypermedia) to mutualize their conception and implementation. Furthermore, the documents adaptation to particular users reading profiles is not considered whereas for some application fields, like learning, this remains an important need. On the basis of those observations, MediaStudio will try to be a contribution to the field of editing and presenting interactive multimedia documents through a set of propositions to compensate the mentioned insufficiencies.
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    Un modèle logique de documents pour les interactions multimédia
    (JTEA, 2008-05-02) Maredj, Azze-Eddine; Alimazighi, Zaia; Tonkin, Nourredine; Sadallah, Madjid
    La dimension temporelle d’un document multimédia interactif confère à ses objets des comportements différents de ceux d’un document classique. De nouveaux besoins de lecture doivent être considérés pour maîtriser sa complexité de perception. Les interactions utilisateur sont une solution à ces besoins. Toutefois, dans les systèmes multimédia actuels, c’est uniquement sur les objets du document que reposent ces interactions et de plus le lecteur est réduit à un rôle passif. Dans cet article, nous proposons un modèle logique de documents multimédia où les objets ne sont plus perçus comme des entités indissociables mais peuvent être regroupés en scènes définissant des parcours de lecture selon le besoin. De plus, le lecteur peut définir ses propres parcours de lecture. Un ensemble de mécanismes d’interactions y est proposé. --------------- The temporal dimension of an interactive multimedia document confers to its objects behaviors different from those of a traditional document. New needs for reading must be considered to control its complexity of perception. The user interactions are a solution to these needs. However, in the current multimedia systems, the interactions are based only on the document objects and the reader is reduced to a passive role. In this paper, we propose a logical model for multimedia documents where the objects are no longer seen as inseparable entities but can be grouped into scenes defining paths of reading as needed. In addition, the reader can define its own paths of reading. A set of interaction mechanisms is proposed.
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    Modèles et Outils Documentaires pour les Hypervidéos sur le Web
    (Université Abderrahmane Mira de Béjaia, 2011-11-16) Sadallah, Madjid; Prié, Yannick
    Avec l’émergence de nouvelles formes de présentation et de représentation des documents audiovisuels, l’hypervidéo - une technologie attractive axée sur l’hypermédia à forte composante vidéo - introduit de nouvelles pratiques d’accès et de partage de la connaissance des documents audiovisuels complexes. Son objectif est d’instaurer une culture audiovisuelle axée sur une lecture active et des expériences utilisateurs inouïes avec des paradigmes de présentation nouveaux et des alternatives d’interactions encore plus élaborées. Généralement définis par des représentations hypermédia conventionnelles, les concepts et pratiques utilisés jusque là sont trop généraux pour couvrir tout ce qui caractérise les hypervidéos, ce qui les empêche d’être mieux étudiées et plus répandues. Le besoin d’un fondement théorique a motivé la proposition de CHM - Component-based Hypervideo Model -, un modèle de données qui considère les hypervidéos au delà de ceux de l’hypermédia et du multimédia trop généraux et peu expressifs. Il suit les principes de la modélisation à base de composants et la description à base d’annotations. Le modèle proposé sert comme base théorique pour une implémentation qui cible la vidéo sur le Web, présentée comme preuve des principes avancés et ayant comme perspective d’avancer des éléments de réponse pour une meilleure prise en charge et une exploitation optimale de la vidéo sur le Web.
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    Modèles et Outils documentaries pour les hypervidéos sur le web
    (CERIST, 2012) Sadallah, Madjid; Maredj, Azze-Eddine; Aubert, Olivier; Prié, Yannick
    Avec l'émergence de nouvelles formes de présentation et de représentation des documents audiovisuels, l'hypervidéo - une technologie attractive axée sur l'hypermédia à forte composante vidéo - introduit de nouvelles formes de diffusion de documents audiovisuels à structures complexes. Son objectif est de permettre des expériences utilisateurs inouïes avec des paradigmes de présentation nouveaux et des alternatives d'interactions encore plus élaborées. Généralement considérées via des modèles hypermédias, les concepts et les représentations associés aux hypervidéos restent encore trop généraux pour couvrir toutes leurs caractéristiques, les empêchant d'être mieux étudiées et plus répandues. Le besoin d'un fondement théorique spécifique aux hypervidéos a motivé la proposition du modèle CHM - Component-based Hypervideo Model -, élaboré suivant les principes de la modélisation base de composants et la description à base d'annotations. Cette nouvelle base théorique sert comme fondement pour une implémentation des hypervidéos ayant pour cible la vidéo sur le Web, présentée comme preuve des principes avancés et ayant en perspective de proposer une meilleure prise en charge et une exploitation optimale de la vidéo sur le Web. ---- Defined as a specialization of hypermedia focusing on interactive video, hypervideo is an attractive technology that promises non-conventional and powerful features. It aims to bring more powerful capabilities for video-centric documents and to offer novel user experiences with more elaborated practices and advanced interaction alternatives. Usually considered from a conventional hypermedia perspective, the underlying concepts and representations are too general to qualify hypervideos, preventing this kind of documents from being broadly investigated. The need for theoretical foundations for hypervideos motivates the present work. With the aim to provide a formal data model that considers hypervideo beyond the very general and conventional hypermedia ones, CHM - Component-based Hypervideo Model - is an attempt to theorize hypervidéos using a component-based modeling and an annotation-driven document description. The proposed model serves as a basis for a Web-oriented implementation used as a proof of principles and a means to provide a basis for more elaborated practices of online video implementation since the features of hypervideo are grafted to wider video-based Web documents in a simple yet powerful and Web standards-compliant manner
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    Models and Tools for Usage-based e-Learning Documents Reengineering
    (2019-04-25) Sadallah, Madjid
    Providing high-quality content is of utmost importance to drive successful reading. Besides, designing documents that are received the way the author wishes has always been difficult, and the digital world increases this difficulty by multiplying the possibilities related to mixed medias and interactivity. This compels authors to continuously review the delivered content to meet readers' needs. Yet it remains challenging for them to detect the comprehension barriers that may exist within their documents, and to identify how these latter can be improved accordingly. This compels authors to continuously review the delivered content to meet readers' needs. Yet it remains challenging for them to detect the comprehension barriers that may exist within their documents, and to identify how these latter can be improved accordingly. In this thesis, we focus on an educational context, where reading is a fundamental activity and the basis of many other learning activities. We propose a learning analytics approach for assisting course authors to maintain their courses to sustain learning. The proposals are based on theoretical background originated from research on learning analytics, reading comprehension and content revision. We advocate \usage-based document reengineering", a process defined as a kind of reengineering that changes document content and structures based on the analysis of readers' usages as recorded in their reading traces. We model reading activity using the concept of reading-session and propose a new session identification method. Using learners' reading sessions, a set of indicators related to different aspects of the reading process are computed and used to detect comprehension issues and to suggest corrective content revisions. The results of the analytics process are presented to authors through a dashboard empowered with assistive features. We instantiate our proposals using the logs of a major e-learning platform, and validate it through a series of studies. The results show the effectiveness of the approach and dashboards in providing authors with guidance in improving their courses accordingly.
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    Towards Reading Session-based indicators in Educational Reading
    (CERIST, 2015-06) Sadallah, Madjid; Encelle, Benoît; Maredj, Azze-Eddine; Prié, Yannick
    It is a challenging task to identify eLearning courses parts that have to be revised to best suit learners’ requirements. Reading being one of the most salient learning activities, one way of doing so is to study how learners consume courses. We intend to support course authors (e.g. teachers) during courses revision by providing them with reading indicators. We use the concept of reading session to denote a learner’s active reading period, and we provide several associated reading indicators. In our server-side approach, reading sessions and indicators are calculated using web server logs. We evaluate the relevance of our proposals using logs from a major French eLearning platform. Results are promising: calculated reading sessions are theoretically more precise than other best applicable approaches, and course authors consider suggested indicators to be appropriate to courses revision. Using reading sessions and associated indicators could facilitate authors’ work of course reengineering.
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    Towards reading session-based indicators in educational reading analytics
    (Springer, 2015-09) Sadallah, Madjid; Encelle, Benoît; Maredj, Azze-Eddine; Prié, Yannick
    It is a challenging task to identify eLearning courses parts that have to be revised to best suit learners' requirements. Reading being one of the most salient learning activities, one way of doing so is to study how learners consume courses. We intend to support course authors (e.g. teachers) during courses revision by providing them with reading indicators. We use the concept of reading session to denote a learner's active reading period, and we provide several associated reading indicators. In our server-side approach, reading sessions and indicators are calculated using web server logs. We evaluate the relevance of our proposals using logs from a major French eLearning platform. Results are promising: calculated reading sessions are theoretically more precise than other best applicable approaches, and course authors consider suggested indicators to be appropriate to courses revision. Using reading sessions and associated indicators could facilitate authors' work of course reengineering.