Research Reports
Permanent URI for this collectionhttp://dl.cerist.dz/handle/CERIST/34
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Item Selection of Information Sources using a Genetic Algorithm(CERIST, 2017-01-02) Lebib, Fatma Zohra; Drias, Habiba; Mellah, HakimaWe address the problem of information sources selection in a context of a large number of distributed sources. We formulate the sources selection problem as a combinatorial optimization problem in order to yield the best set of relevant information sources for a given query. We define a solution as a combination of sources among a huge predefined set of sources. We propose a genetic algorithm to tackle the issue by maximizing the similarity between a selection and the query. Extensive experiments were performed on databases of scientific research documents covering different domains such as computer science and medicine. The results based on the precision measure are very encouraging.Item Data mining pour la construction de communautés d'utilisateurs(CERIST, 2016-05-10) Boulkrinat, Nour El Houda; Drias, Habiba; Mellah, Hakima; Khellouf, Hassina; Bouchabou, AidaLes communautés d’utilisateurs sont tenues ensemble par un intérêt commun dans un champ de savoir et sont conduites par un désir et un besoin de partager des idées, des expériences, des modèles, des outils et des meilleures pratiques. Dans ce travail nous présentons notre solution pour la construction de communautés d’utilisateurs en tenant compte des centres d’intérêts et en se basant sur la technologie du data mining. Les centres d’intérêts seront introduits à partir d’une ontologie dédie au domaine de l’informatique. Quant au data mining, il sera utilisé pour la segmentation des communautés via l’utilisation de l’algorithme K-means. Cette construction de communautés aidera le système de recherche d’information à l’acquisition implicite des nouveaux profils par la sélection ou l’adaptation d’un profil prédéfini, et à la reformulation des requêtes de l’utilisateur en fonction de nouvelles connaissances acquissent à partir de la communauté où il appartient.Item Enterprise information system, agility and complexity, what is the relationship?(CERIST, 2016-02-05) Mellah, Hakima; Drias, HabibaComplexity term is present everywhere. Complexity surrounds information, information system, organization as well as computing systems. In this work we present some challenges that deal with complexity. Why enterprise organization can be seen as complex? From what, complexity can arise within enterprise information system? What is relationship between complexity and agility? What are factors that may evolve complexity within enterprise information system? How computing system led information system towards complexity? To response to all this challenges, several dimensions dealing with complexity are displayed such as dynamics in enterprise information system components, while interacting, that can be tolerated by components autonomy, intelligibility that causes knowledge evolving, and inter-connectivity that is necessary with distribution. All these factors influence each others, within in a three dimensional system. UML modeling of enterprise information system that includes complexity parameters is given.Item Exploring a self organizing Multi Agent System for service discovery(CERIST, 2009-09) Mellah, Hakima; Drias, Habiba; Banarjee, Soumya; Hassas, SalimaThe paper presents a Multi Agent System (MAS) approach, for service discovery process to consider the user in the service discovery process involoving his interactions under constraints. The service discovery has become an emerging phenomena in software engineering and process engineering as well. The proposed MAS has demonstrated significant self oranizining potential. This feature is very crucial for assuring a correct service delivery, to avoid failures or mal-function for the service discovery environment. The requirement for self organizing choreographed services have been well realized, in case of operational, functional and behavioral faults. Self organization within the MAS is adopted by the recourse to a self organizing protocol conceived from bacteria colony and evolutinary computation paradigm.Item A formal approach for a self organizing protocol: Production System application(CERIST, 2009-10) Mellah, Hakima; Drias, Habiba; Hassas, SalimaAny dysfunction in production system (PS) is likely to be very expensive; so modelling by Multi Agent Systems (MAS) makes the production system (PS) possible to have aspects of robustness, reactivity and flexibility, which allow the PS control to be powerful and to react to all the risks being able to occur. In order to have a fault-tolerant PS, we propose when and how to recourse to a self organizing protocol making the MAS capable of changing its communication structure or organization, and thus reorganizing itself without any external intervention.Item Toward a business process collaboration in E-commerce exchange using Web serice(CERIST, 2009) Khelifa, Lydia Nadia; Aklouf, Youcef; Drias, Habiba; Boumellil, Lamia SabihaB2B e-commerce is an emergent area, which the profit of enterprises depend on its performance. Business Process collaboration is a challenge that companies are facing to. However, emergent specifications resulted from the convergence of web services and grid i-e Web Service Resource Framework (WSRF) open new horizon for the collaboration of business Processes. WSRF specifies a WS-Resource approach to model and manage state in a Web services context. In this paper, we present our vision of integrating WSRF in business process collaboration which is described through a collaborative Business Process defined by all participants. WSRF is used to virtualize and encapsulate the private Business Processes. The WS-Notification is used to notify about the state changes to coordinate participant Business ProcessesItem Découverte Des Grid Services Publiés Dans Des Registres Hétérogènes(CERIST, 2009-03) Boulkrinat, Nour El Houda; Aklouf, Youcef; Drias, HabibaL’environnement du grid est caractérisé par des ressources multiples et dynamiques, publiées dans des registres qui sauvegardent les informations relatives aux ressources, tel que : MDS (Monitoring and Discovery System) et GMD (Grid Market Directory). Il se trouve que parfois, les besoins des utilisateurs nécessitent d’autres ressources et applications publiées dans d’autres registres comme : UDDI (Universal Description Discovery and Integration) ou ebXML. La découverte et l’accès aux grid services publiés dans des registres hétérogènes, devient alors une tâche complexe. Cet article s’intéresse à la résolution de ce problème, à cet effet, nous proposons une approche de découverte qui permettra aux utilisateurs un accès transparent à ces registres sans se soucier de leurs structures.