Dr. Zarko is a Professor at the Maritime Faculty, University of Dubrovnik, CROATIA. Dr. Zarko spent several years as a field engineer and Marine engineer. He is Establishing a cruise management company from the beginning til full certification (Document of Compliance, ISO 9001, establishing technical dep; purchasing dep; HR dep). Managed planned maintenance system of the ships, implemented planned maintenance system -AMOS, organized shore support, purchased certifications from flag state and classification society. Planning and supervising dry docking. Managing vendors and services. Planning, organizing, and supervising refit and rebuilding of ship interiors, new cabins, restaurants, and other public spaces on the cruise ships. Chief Engineer of Cruise Ships. Dr. Zarko has authored over 50 journal articles and conference papers in high-quality engineering and scientific journals such as the NAŠE MORE, Promet-Traffic & Transportation, and Transactions on Maritime Science. Dr. Zarko is a member and a certified engineer of the Croatian Chamber of Engineers of Transport and Transportation Technology - a professional class of marine engineers and traffic engineers on inland waterways, a Junior Editor of the international scientific journal for the sea and seafaring Naše more; and of the Journal of Environmental Science and Engineering Technology. A member of the examination committee at the Ministry of Maritime Affairs of Transport and Infrastructure - Harbour Master's Office in Dubrovnik for taking state professional examinations of a ship's engineer, Chief engineer, and ship's electro-technical officer, He is also actively involved in the international exchange of teaching staff of the Erasmus+ program.

Dr. Gwanghyun Jo is an Associate Professor (Tenure Track) with the Department of Mathematical Data Science, Hanyang University ERICA, Republic of Korea. He received the B.S. (Feb. 2011), M.S. (Feb. 2013), and Ph.D (Feb. 2018). degrees in Department of Mathematical Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea. From 2018 to 2019, he was a Postdoctoral Researcher at Department of Mathematical Sciences in KAIST. He was an Assistant Professor (Tenure Track Sep. 2019~Sep. 2022) and Associate Professor (Tenure Track Oct. 2022~Aug. 2023) in the Department of Mathematics, Kunsan National University, Republic of Korea. Since Mar. 2025, he has been an Editor-in-Chief of JICCE (SCOPUS/KCI) (Korea Institute of Information and Communication Engineering/former Korean Institute of Maritime Information & Communication Sciences since 2003~2011). Also, he has served as a Vice President of Korea Institute of Information and Communication Engineering since Mar. 2025.

Currently, he is a member of the editorial board of International Journal of Fuzzy Logic and Intelligent Systems, Journal of Korean Institute of Intelligent Systems, and Journal of Korea Institute of Information and Communication Engineering.

Recently, he has been selected for Mid-Career Researcher Program grant from the National Research Foundation of Korea (NRF) for the project “Development of a mixed virtual volume method for prediction of multiphase flows in poroelastic media” (2025.9~2028.8).