Professor Dr. Hakan Çaliskan is a Professor of Mechanical Engineering at Usak University in Turkey. He received his BSc, MSc, and PhD degrees from the Department of Mechanical Engineering (Thermodynamics) at Pamukkale, Eskisehir Osmangazi, and Ege Universities in Turkey, respectively. He worked as a Professor in Department of Mechanical Engineering of Kyung Hee University in Republic of Korea, as a Professor in the Teikyo University in Japan, and as a Researcher in University of Ontario Institute of Technology (Ontario Tech University) in Canada. He is an Assistant Editor/Guest Editor/Editorial Board member of 16 international journals. He is an editorial board member in 11 international journals and an active reviewer in more than 30. He established Usak University Energy, Environment and Sustainability (ENÇES) Application and Research Center and also contributed to postgraduate education activities by establishing the Department of Energy and Environmental Sciences.