Web mashup is a lightweight technology used to integrate data from remote sources without direct access to their databases. As a data consumer, a Web mashup application creates new contents by retrieving data through the Web application programming interface (API) provided by the external sources. As a data provider, the service program publishes its Web API and implements the specified functions. In the project reported by this thesis, we have implemented two Web mashup applications to enhance the Web site oystersentinel.org: the Perkinsus marinus model and the Oil Spill model. Each model overlay geospatial data from a local database on top of a coastal map from Google Maps. In addition, we have designed a Web-based data publishing service. In this experimental system, we illustrated a successful Web mashup interface that allows outside developers to access the data about the local oyster stock assessment.

Le Web2.0 est envisagé comme un espace ouvert aux services et met les gens au centre de cette optique. Le succès de contenus générés par utilisateur laisse entrevoir une nouvelle perspective en permettant aux utilisateurs de créer eux-même leurs propres services. La première contribution de la thèse consiste à en fournir un état de l'art complet. Nous donnons une description précise des UGS, puis analysons leurs défis par un parcours de différentes technologies. Notre deuxième contribution repose sur la conception et l'implémentation d'une plate-forme de mashups simple dont le but est une plus grande motivation dans l'utilisation des mashups. Nous présentons, pour le consommateur, un système de mashup basé sur les activités quotidiennes en reliant les événements du calendrier à des gadgets utiles. Le système, appelé EBSP, a été évalué par 131 utilisateurs finaux pour tester sa convivialité. De plus, il est utilisé comme un exemple représentatif dans la proposition d'un modèle d'acceptation par l'utilisateur des mashups de consommateur. Notre troisième contribution focalisée sur le problème d'utilisation de l'annotation sociale à soutenir la découverte widget web. Un modèle de découverte de gadgets amélioré est proposé en se basant sur des annotations sociales. En utilisant le service en ligne Widgetbox.com, nous démontrons la validité et l'efficacité de notre modèle. En quatrième lieu, nous avons conçu un système original en ligne de réseaux sociaux orienté activités. Le système, appelé Dig-Event, fournit un espace social ouvert pour les utilisateurs afin de partager les événements et découvrir les activités d'intérêt mutuel parmi les contacts sociaux / Web 2.0 is envisioned as an open garden for services and it puts people into the centre of the vision. The success of the user generated content raises the new idea of enabling end-users to create their own services. The first contribution of the thesis is to provide a comprehensive survey of the state–of-the-art development in this area. We give the specific description of UGS, and then go through different technologies to analyze their challenges. Our second contribution lies in designing and implementing a simple mashup platform which provides the greater motivation for mashups usage. We present a consumer mashup framework based on daily activities, by relating every-day calendar events to useful gadgets. The system, named EBSP, was evaluated by 131 end-users to test for its usability. Also, as a representative example, the system is used in a proposed user-acceptance model for consumer mashups. Our third contribution focuses on the problem of using social annotation to support web widget discovery. An enhanced web gadget discovery model is proposed based on social tagging. Using the online service Widgetbox.com, we demonstrate the accuracy and efficiency of our proposed model. Fourthly, we designed a novel system for activity-oriented online social networking named Dig-Event. Dig-Event provides an open, social space for users to share events and discover the activities of mutual interests among social contacts. It allows users to share their activities, to customize their social circles, to conduct events, and to socialize around them. The features of event recommendation and integration with existing social networks further boost the event socializing experience

Web 2.0 is envisioned as an open garden for services and it puts people into the centre of the vision. The success of the user generated content raises the new idea of enabling end-users to create their own services. The first contribution of the thesis is to provide a comprehensive survey of the state-of-the-art development in this area. We give the specific description of UGS, and then go through different technologies to analyze their challenges. Our second contribution lies in designing and implementing a simple mashup platform which provides the greater motivation for mashups usage. We present a consumer mashup framework based on daily activities, by relating every-day calendar events to useful gadgets. The system, named EBSP, was evaluated by 131 end-users to test for its usability. Also, as a representative example, the system is used in a proposed user-acceptance model for consumer mashups. Our third contribution focuses on the problem of using social annotation to support web widget discovery. An enhanced web gadget discovery model is proposed based on social tagging. Using the online service Widgetbox.com, we demonstrate the accuracy and efficiency of our proposed model. Fourthly, we designed a novel system for activity-oriented online social networking named Dig-Event. Dig-Event provides an open, social space for users to share events and discover the activities of mutual interests among social contacts. It allows users to share their activities, to customize their social circles, to conduct events, and to socialize around them. The features of event recommendation and integration with existing social networks further boost the event socializing experience