Professor Keiji Ujikawa
Yokohama National University, Japan

Keiji Ujikawa is a full professor in the Graduate School of International Social Sciences, Yokohama National University, Japan. He specializes in environmental economics, environmental policy studies, environmental valuation, and economic statistics. Professor Ujikawa's research interests include indicators, decision making, and impact assessment of sustainable development. He is also interested in economic, social, and environmental effects of renewable energy (energy conservation) expansion. In 2002, he received his Doctor of Philosophy in Economics from the Graduate School of Economics and Management, Tohoku University. In 2007, he was a visiting researcher in the Business School at Beijing Normal University, Beijing, China. He published several books and a large number of academic articles, and he served as the representative of research projects. In addition, he has trained many Master's and Ph.D. students from abroad.He is an editorial committee member of the Pan Pacific Association of Input-Output Studies (PAPAIOS). He is also a member of the Society for Environmental Economics and Policy Studies (SEEPS) and many other academic organizations.

Professor Nur Islami
Universitas Riau, Indonesia

Nur Islami received his B.Sc. from Universitas Riau and his M.Eng from Institut Teknologi Bandung (ITB), Indonesia, and Ph.D. degrees from University of Malaya, Malaysia. He worked in Caltex Pacific Indonesia (an Oil Company) in 1997-2000. He joined Universitas Riau, Indonesia as Lecturer from 2000 until now. He was as Visiting Senior Lecturer in University of Malaya (70 QS World Ranking), Malaysia from 2006 to 2015. During this period (2006-2015) he also was an instructor and consultant for the environment and exploration company that was related to the geophysics. He received the Professor since 2020 in the field of Geophysics from Universitas Riau, Indonesia. Now, Prof Nur Islami, Ph.D is the Vice President of Physics Society of Indonesia Riau. He is a reviewer in several Scopus-Indexed Journals and also associate editor of Arabian Journal of Geoscience. His research is correlated with the geophysical method for the environment and earth resources exploration. Prof Nur Islami has many publications in the reputed Scopus-indexed journals.