Chun-Gil Park. He has accomplished his doctoral degree in Mathematics from the University of Maryland and is currently working as a professor at Hanyang University. He is working for several journals such as Journal of Nonlinear Science and Applications and Journal of Computational Analysis and Applications as the associate editors and Journal of Nonlinear Analysis and Applications as the Editor-in-Chief. His main research topics include operator algebras, functional inequalities, functional equations, non-commutative geometry, fixed point theory and fuzzy mappings. He has published a number of academic articles on international journals related to operator algebras, functional inequalities, functional equations, non-commutative geometry, fixed point theory and fuzzy mappings. Within the last twenty years, he has successfully published more than 500 articles on SCI-E journals.