Dr. Umut Durak is a Research Scientist in the Department of Flight Dynamics and Simulation at the Institute of Flight Systems of the German Aerospace Center (DLR), Braunschweig, Germany. Dr. Halit Oguztuzun is an Associate Professor in the Computer Engineering Department at the Middle East Technical University, Ankara, Turkey. Dr. Levent Yilmaz is a Professor of Computer Science and Software Engineering, with a joint appointment in the Department of Industrial and Systems Engineering, at Auburn University, Auburn, AL, USA. His other publications include the Springer title Concepts and Methodologies for Modeling and Simulation.