José Bravo1, Diane Cook2, Giuseppe Riva3. 1. MAmI Research Lab at Castilla-La Mancha University, Ciudad Real, Spain. Electronic address: Jose.Bravo@uclm.es. 2. Washington State University, Pullman, WA, United States. Electronic address: cook@eecs.wsu.edu. 3. Catholic University of Sacred Heart and Istituto Auxologico Italiano, Milan, Italy. Electronic address: giuseppe.riva@unicatt.it.