Contribution à l’automatisation des processus de fragmentation, de duplication et de réplication des Bases de Données Distribuées à base des Protocoles Réseaux

La gestion distribuée des données nécessite des processus automatisés, bien adaptés aux règles de fragmentation, de duplication et de réplication de ces données sur plusieurs serveurs de Bases De Données (BDD). Notre contribution consiste à mettre en place des processus pour l’amélioration de la stratégie de gestion distribuée des données en intégrant tous les aspects d’analyse lexicale et syntaxique concernant les besoins en données significatives de chaque serveur, en particulier celles qui répondent aux différentes requêtes ou demandes les plus fréquemment soumises par les utilisateurs locaux. Il s’agit du développement d’un compilateur d’algèbre relationnelle et de requêtes SQL. L’automatisation de ces processus permettra aux administrateurs de BDD distribuées d’utiliser plus facilement les sous BDD en fonction du nombre de sites (serveurs de BDD) et des contraintes de division exprimées par les besoins des utilisateurs locaux. Les principaux apports de cette automatisation peuvent être résumés ainsi : Répartition automatique d’une BDD globale en plusieurs sous BDD locales,Extraction de données recherchées indépendamment de l’emplacement physique de leurs sources,Transfert global des données en cascade entre sites,Amélioration de l’équilibre de charges sur les serveurs,Allocation dynamique des fragments de données à plusieurs serveurs

Contribution to the semantic characterization of web service by non-functional properties for the selection and composition of services

This paper suggest an engineering oriented vision of services composition where the composition has its own life cycle and can be reused and adapted to operating contexts. We will present a specific model that enable the enrichment of ontology of services by non-functional properties corresponding to the quality of service, user profiles, preferences and security protocols of access to information corresponding to user profiles

An Elaboration of a Strategic Alignment Model of University Information Systems based on SAM Model

Information system is a guarantee of the universities' ability to anticipate the essential functions to their development and durability. The alignment of information system, one of the pillars of IT governance, has become a necessity. In this paper, we consider the problem of strategic alignment model implementation in Moroccan universities. Literature revealed that few studies have examined strategic alignment in the public sector, particularly in higher education institutions. Hence we opted for an exploratory approach that aims to better understanding the strategic alignment and to evaluate the degree of its use within Moroccan universities. The data gained primarily through interviews with top managers and IT managers reveal that the alignment is not formalized and that it would be appropriate to implement an alignment model. It is found that the implementation of our proposed model can help managers to maximize returns of IT investment and to increase their efficiency

Representing IT Projects Risk Management Best Practices as a Metamodel

Although still relatively new, the field of IT Governance has its own bodies of knowledge that include various methodologies, frameworks and techniques supported by an increasing growing base of research. IT Project Risk Management has since emerged as its own field. Many frameworks and methodologies were proposed by both practitioners and researchers. A review of the literature about the subject shows that there is a divergence between the two. The practitioners propose a set of good practices from professional environment but the heaviness of the proposed guides does not allow its application and adoption by managers or it’s improvement by researchers. Thus it calls for specific focus on IT governance frameworks best practices modelling in order to reach fusion between practitioners and researchers contributions. In this paper, special attention is dedicated to Project Management Institute’s guides. The main objective is representing IT Project Risk Management best practices as a Metamodel in order to complement different areas of knowledge