MicroMAIS: executing and orchestrating Web services on constrained mobile devices

Mobile devices with their more and more powerful resources allow the development of mobile information systems in which services are not only provided by traditional systems but also autonomously executed and controlled in the mobile devices themselves. Services distributed on autonomous mobile devices allow both the development of cooperative applications without a back-end infrastructure and the development of applications blending distributed and centralized services. In this paper, we propose MicroMAIS: an integrated platform for supporting the execution of Web service-based applications natively on a mobile device. The MicroMAIS platform is composed of mAS and μ-BPEL. The former allows the execution of a single Web service, whereas the latter permits the orchestration of several Web services according to the WS-BPEL standard

Context-Aware Systems: A More Appropriate Response System to Hurricanes and Other Natural Disasters

AbstractA context-aware system may be defined as a system that can understand the context of a given situation and either share this context with other systems for their response or respond by itself. Context has many definitions such as additional information that further describes a given situation. However, the definition of context is very contentious – what is considered context in one system may be considered unimportant in another.In this paper, we focus on the ability of context-aware systems to respond to external events, in particular incoming hurricanes, in an appropriate, authorised and regular manner. Hurricanes are often problematic in that they may be difficult to predict, in terms of direction and intensity, and require immediate and appropriate responses. We look at how this system will respond to an authorised set of stimuli using a pre-defined sequence and set of behavioural rules. The response produced by the system will be appropriate depending on the context of the stimuli received

La contextualisation en entreprise (mettre en avant utilisateurs et développeurs)

Les applications contextuelles doivent gérer un flux contenu de contexte selon une logique approprié. Les travaux de recherche en contextualisation se limitent à proposer des plateformes de développement proposant des mécanismes d adaptation prédéfinie. Cette thèse se propose d étende l état de l art en proposant des nouveaux concepts formant la fondation pour la création d application contextuelles en adoptant des principes de l ingénierie logicielle et une décomposition fonctionnelle. Aussi, cela permet l intégration de comportements contextualisés à des applications non initialement conçus pour cela. La thèse propose une autre manière centrée-contexte permettant de séparer la représentation du contexte de son interprétation, offrant encore plus de flexibilité à la gestion de contexte. Les propositions sont analysées aux lumières d étude de cas et de simulations. Le résultat de la thèse est l introduction de nouvelle approche de création d applications contextuelles qui met en avant le développeur mais aussi l utilisateurContext-aware applications must manage a continuous stream of context according to dedicated business logic. Research was limited on proposing frameworks and platforms that have predefined behavior toward applications. This thesis attempts to extend background works by proposing new concepts serving as foundation for a flexible approach for building context-aware applications. The thesis examines the state of the art of context-aware computing, then adopts well-established software design principles and a functional decomposition for designing a reference model for context management enabling seamless integration of context-awareness into applications. Also, the thesis studies the use of context in common applications and proposes a context-centric modeling approach which allows the creation of a graph-based representation where entities are connected to each other through links representing context. Furthermore, the context graph decouples the presentation and the semantics of context, leaving each application to manage the appropriate semantic for their context data. Case studies are conducted for the evaluation of the proposed system in terms of its support for the creation of applications enhanced with context-awareness. A simulation study is performed to analyze the performance properties of the proposed system. The result of this thesis is the introduction of a novel approach for supporting the creation of context-aware applications that supports the integration of context-awareness to existing applications. It empowers developers as well as users to participate in the creation process, thereby reducing usability issuesEVRY-INT (912282302) / SudocSudocFranceF