A Personal Learning Environment (PLE) is a self-defined collection of services, tools, and devices that help learners build their Personal Knowledge Networks (PKN), encompassing tacit knowledge nodes (i.e. people) and explicit knowledge nodes (i.e. information).
Dr.rer.nat. Mohamed Amine Chatti is an assistant professor of computer science in the Learning Technologies Group (Informatik 9) at RWTH Aachen University, Germany. He has a diploma degree in computer science from the University of Kaiserslautern, Germany, in 2004 and a PhD degree in computer science from RWTH Aachen University, Germany, in 2010. His research focuses on Web Information Systems, Technology Enhanced Learning, and Knowledge Management.