Joselito Medina-Marin received his M.S. and Ph.D. in electrical engineering from the Research and Advanced Studies Centre, National Polytechnic Institute, Mexico, in 2002 and 2005, respectively. He is a Professor of Advanced Research at the Industrial Engineering Centre, Autonomous University of Hidalgo State, Pachuca, Hidalgo, Mexico. He is also a member of the National System of Researchers, currently at level 1. His current research interests include artificial neural networks, Petri net theory and its applications, active databases, simulation, and programming languages.