Marlos Silva

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Some researchers have developed relevant and diverse proposals for improving the content quality of the learner model in Intelligent Tutoring Systems, mainly reducing its uncertainty. Following this aim, this paper proposes an open learner modeling approach using Bayesian networks, focusing on negotiation mechanism to solve detected cognitive conflicts that(More)
A vaccine containing integral membrane glycoproteins from the intestine of Haemonchus contortus was evaluated in three groups of eight 5 months old grazing calves, naturally infected by Haemonchus similis, Haemonchus placei and other gastrointestinal nematodes. Vaccinated calves received 5 or 50μg of the antigen and 1mg of saponin adjuvant, while the(More)
To better evaluate the usefulness of female Haemonchus specimens for specific identification, we undertook a detailed analysis of the morphology of a collection of worms obtained from cattle and sheep in shared pastures. Based on the results, we also more precisely evaluated the host-specificity of Haemonchus contortus, H. placei and H. similis occurring(More)
With the emerging growth of Web Services technology, the Web is now evolving to become a service provider. In this context, a major challenge is the Semantic Web Services discovery and composition problem. This task is hard because injecting context into adaptive service integration and management raises a number of significant difficulties, i.e. defining(More)
The Interactive Digital TV may be the main source of digital inclusion in the world besides it being a means of spreading education to a greater number of people in anywhere. In this new form of interaction, the concept of learning based on interactive TV (t-learning) arises, which it will make a simple viewer in a student that would have access to(More)