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)
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)
This paper presents models for building multi-agent systems. First, we present a model for specifying multi-agent systems based on the Gaia methodology. Below we present a model for system verification based on the high level Petri net. For the evaluation of the models we present a case study in Intelligent Tutoring Systems in the domain of mathematics. In(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)
Social analysis in Twitter has become a very interesting research scenario. Twitter's popularity and the millions of spontaneous interactions between its users turned the social network into a rich data source. A possible use of this data is to measure collective sentiments related to events. In this short paper, we propose an analysis of the content shared(More)
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