Search

With the flourish of online education and distance learning, it's become very important to make the evaluation in e-learning scientifically and objectively. This paper presents an intelligent fuzzy evaluation system based on our innovative evaluation method where management rules made by the experts are used to help, optimize and decide. On this basis, we develop an evaluation method and algorithm based on the fuzzy logic concepts and new information technologies. Thus, intelligent applications are possible if one wish to automate the management and decision while making an alarm system based on relevant indicators. Finally, we come up with an “expert system” that can provide some solutions to the problems of measurement theory. In addition, we present a concrete example to compare this method with the traditional one then draw conclusions on the effectiveness of this method.

Vision plays an important role in improving comprehension and perception of electromagnetic fields. One reason electromagnetic fields is considered by students to be a difficult course is because electromagnetic fields, being vector functions of space and time, unlike mechanics, which deals with concrete objects, are conceptually abstract and hard to visualize. Invisibility is a considerable obstacle on the way to understanding physical phenomena. To overcome this obstacle, we present in this paper some interactive simulations mainly developed for educational purposes in electromagnetics in order to facilitate the understanding of field theory and vector analysis. This interactive simulations can be used as a virtual laboratory where students can explore the solutions on their own efforts and in every detail, hence, deepening their understanding of the subject matter.

Mobile Ad Hoc Networks (MANETs) are susceptible to a variety of attacks that threaten their operation and the provided services. Intrusion Detection Systems (IDSs) may act as defensive mechanisms, since they monitor network activities in order to detect malicious actions performed by intruders, and then initiate the appropriate countermeasures. IDS for MANETs have attracted much attention recently and thus, there are many publications that propose new IDS solutions or improvements to the existing. In this paper, we study the different existing IDS architectures for MANETs. We briefly present for each architecture, after an analysis, the strengths and weaknesses, the methods/techniques that have been proposed to improve the performances and the provided security services. Then, we propose a new IDS architecture for MANETs, this architecture is a combination model hierarchical based on clusters and cooperation model based on a multi-agent system (SMA). In this architecture, agents use a knowledge related to a global security ontology, it can be used to infer new detection rules.