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— Reducing the production costs associated with digital materials in the e-Learning area is a imperative need. One of the followed strategies is to build didactical materials as modular and reusable components, called digital Learning Objects (LO). Their most important advantage is their ability for integrating easily with other more complex LO to build(More)
A performance analysis methodology for transmission line primary protection systems is presented, based on a probabilistic approach to protection system successful operation. The protection system operation is represented by reliability graphs, and a probabilistic model of the distance protection is considered. The system successful operation is described(More)
—The generation of digital objects is a costly task and also there are very few tools that support the extraction of learning objects from existing digital materials. In this paper we present the general architecture of a system to extract learning objects from digital material, such as for example HTML pages or Word documents. One of the main features of(More)
Following the Part I paper, a comparative performance analysis is presented, considering four different transmission line protection schemes, equipped with aided communication channels. In the Part I paper, the performance analysis methodology was presented, which is based on a probabilistic approach to protection system successful operation. The system(More)
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