Degree: PhD in Informatics. Jointly issued by Montpellier Laboratory of Informatics, Robotics and Microelectronics (LIRMM) - University of Montpellier, France, and Graduate Program in Computer Science - Pontifical Catholic University of Rio Grande do Sul (PUCRS), Brazil. Examination committee members: G. Gogniat, J. L. Guntzel, L. Torres, L.S. Indrusiak, C. Marcon, L. Ost, G. Sassatelli, F. G. Moraes.