11:15 AM - 11:30 AM
*Jonathan Tandang Macuroy1, Ryohei Takahashi1, Akira Hara2, Yoshinori Okaue2, Akira Imai3, Pearlyn Manalo1, Hinako Sato1, Andrea Agangi1 (1.Graduate School of International Resource Sciences, Akita University, 2.Sumitomo Metal Mining Co. Ltd., 3.Faculty of Engineering, Kyushu University)