L. T. Correia

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Addresses the problem of autonomous underwater vehicle (AUV) control architectures. A particular approach is proposed in which the architecture is structured accordingly to the type of missions the vehicle should perform, with a strong emphasis on its reactive capabilities. A definition of nonconfigurable mission independent behaviours, common to all(More)
The evaluation of pollutant levels is a key aspect on the issue of keeping a clean environment. Conventional techniques include the utilisation of a fixed setup incorporating pollutant sensors. However, these approaches are a very long way from an accurate monitoring. Thus, to improve pollutant monitoring on a power plant chimney, the use of robotic agent(More)
Remote operations in harsh environments, such as those found in the search & rescue and humanitarian demining domains, achieve better results when a strong interaction among users and robots is considered. In addition, robots should be disposable and robust, which can be achieved through parsimonious design. This paper presents a multi-agent system to solve(More)
We develop a dynamic Bayesian beta model for modeling and forecasting single time series of proportions. This work is related to the class of the so called dynamic generalized linear models (DGLM). We use non-conjugate priors and some forms of approximate Bayesian analysis, including Linear Bayesian estimation. Some applications to both real and simulated(More)
We address the problem of finding the correct agents to interact with from a general standpoint. We take the payoff obtained by agents in any game with dilemma as an input to our model. Its output is a probability distribution used in the partner selection that increasingly favours cooperative agents. Our approach contrasts with others designed for specific(More)
In this paper we describe a mapping strategy for a mobile robot. The environment is represented by a graph relating locations of particular places. The qualitative nature of the movements the robot executed to reach such places is also represented in the graph. The sensorial capacity is not demanding; a few distance sensors and a pair of odometers are(More)