Gabriel Plascencia has a Ph. D. degree from the Department of Materials Science & Engineering, University of Toronto, Canada. The same year, he joined the faculty of graduate studies at the Center for Research and Technical Innovation of the National Polytechnic Institute in Mexico City. David Jaramillo Vigueras is a metallurgical engineer from the National Polytechnic Institute (IPN) in Mexico. He has been a professor at the IPN since 1976 at the undergraduate and graduate levels, being also appointed Dean of Research, and Dean of Undergraduate studies at IPN. He has vast experience on industrial consulting in mechanical metallurgy, mechanical integrity and heat treatment of alloys.