Mostafa Ezziyyani

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The explosion of the number of web-based information sources has drastically increased the need for intelligent mediation tools to be implemented between the users and these information resources. These tools must overcome the limitations of the current search engines while making it possible for the users to submit more sophisticated queries than simple(More)
In the context of heterogeneous integration systems the choice of data sources that respond to user requests is usually a very difficult task. It is precisely because the data sources can often be replaced by overlapping and some data transfer are unpredictable and not useful. Consuming entirely or partially the data produced by set of sources before(More)
In a heterogeneous dynamic environment, such as disasters, the continuous adaptation is a perfect solution to offer the adequate services to clients. This Concept is a key to process varying requirement of different users. This is why; we must model the user's context information and structure the services according to the user profile. In this paper, we(More)
Intrusion detection systems are often used to collect and analyze network traffic to help administrators prepare and deal with attacks. In behavioral approach, these detection systems work on the entire network to detect anomalies after establishing the network's normal profile involving all users. In this article we present a new method for intrusion(More)
—In the distributed environment where a query involves several heterogeneous sources, communication costs must be taken into consideration. In this paper we describe a query optimization approach using dynamic programming technique for set integrated heterogeneous sources. The objective of the optimization is to minimize the total processing time including(More)
The goal of this research is to promote the establishment of an information system to provide to the Internet users the quality information on health and medicine related to the Patient Medial Documents (PMD). This information are extracted from several certified heterogeneous sources of the health localized dynamically. In addition, all the data of the(More)
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