Pedro O.S. Vaz de Melo is an associate professor in the Computer Science Department (DCC) of Federal University of Minas Gerais (UFMG). He has degree (2003) and Masters (2007) in Computer Science from the Pontifical Catholic University of Minas Gerais (2003). He got his Ph.D. at Federal University of Minas Gerais (UFMG) with a one year period as a visiting researcher in Carnegie Mellon University and a five months period as a visiting researcher at INRIA Lyon. His research interest is mostly focused on knowledge discovery and data mining in complex and distributed systems. Pedro has published more than sixty peer reviewed papers in journals, magazines and conferences, such as ACM TKDD, PLOS ONE, IEEE Commag, ACM SIGKDD, WWW and ICWSM. He has also received several grants from CNPq and Fapemig and two Google Research Awards for Latin America.