11:15 〜 11:30
*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)