Fadhlil Rizki Muhammad, Bogor Agricultural University, Bogor, Indonesia, Sandro W. Lubis, Rice University, Mechanical Engineering, Houston, TX, United States, Sonni Setiawan, Bogor Agricultural University, Geophysics and Meteorology, Bogor, Indonesia and Givo Alsepan, Hokkaido University, Department of Natural History Sciences, Sapporo, Japan