Mindanao State University - Iligan Institute of Technology, Mindanao State University - Iligan Institute of Technology, Mindanao State University - Iligan Institute of Technology, Mindanao State University - Iligan Institute of Technology, MSU-Iligan Institute of Technology, Mindanao State University - Iligan Institute of Technology, Curtin University, University of Pennsylvania, Hokkaido University, Hokkaido University Division of Sustainable Resources Engineering, affiliation not provided to SSRN, Hokkaido University Division of Sustainable Resources Engineering, Chulalongkorn University - Department of Mining and Petroleum Engineering and MSU-Iligan Institute of Technology