Ho-Young Kwak is Professor Emeritus, Chung-Ang University (Seoul Korea) where he taught and researched in the fields of fluid mechanics and thermodynamics for about 35 years. He obtained his Bachelor of Science in Physics at Seoul National University and MA in Plasma Physics and Ph.D. in Mechanical Engineering at the University of Texas at Austin. He has been working mostly on bubble nucleation and dynamics, especially on sonoluminescence phenomena. Another area of his research field is exergetic and thermoeconomic analysis of thermal systems. He is a permanent member of Korean Academy of Science and Technology. Professor Kwak was a visiting Professor at Cornell University.