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The current information systems (IS) are increasingly complex requiring an enormous work of modelling, using an enormous quantity of the data. Consequently, the designers are confronted with a set of problems concerned in their ignorance of the modelled field and the difficulty with the determination of the concepts and their relations. As solution, we(More)
When creating social recommender systems, trust between various users in social networks emerges as an essential decisive feature. This paper aims at calculating trust among users by identifying all possible relations that may exist among those users and evaluate them. Although many models were proposed to analyze computational trust in different(More)
These recent years, we have seen the emergence of several studies allowing a linkage between databases and ontologies to facilitate the design of databases. However, these studies do not address the needs of the advanced applications, because they do not integrate mechanisms that consider the temporal characteristic. In addition, the complexity of real-time(More)
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