Professor Dr.-Ing. Jovan Mitrovic was a professor and Head of the Department of Thermal Process Engineering and Plant Technology at the University Paderborn, and a profes¬sor in Technical Thermo¬dynamics and Thermal Process En¬gineering at the Univer¬sity Stuttgart, both in Germany. After his retirement, he ac¬cepted a position of a visiting professor at the University in East Sarajevo, Republic of Srpska, Bosnia and Herzegovina, lecturing Thermo/Fluid Ener¬getic in Higher Educa¬tion Programme. He received his de¬gree in Me¬chanical En¬gineering from the University of Bel¬grade (Yugoslavia), and PhD (Dr.-Ing.) from the University Stuttgart, Ger¬many. His main research interests are transport phenomena with phase transitions, falling films heat transfer, and heat trans¬fer improvement. He is author/co-au¬thor of more than 120 papers published in refe¬reed journals; in 2004 he edited the book Heat Exchanger and Condenser Tubes. Professor Mitrovic is a member of the Editorial Board of Chemical Engineering and Tech¬nology. He has supervised/co-su¬pervised over 20 PhD Theses and over 120 Diploma/Master Dissertations.