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*Ichinkhorloo Dagvadorj
Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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Takuma Matsumoto
Meme Media Laboratory, Hokkaido University, Sapporo 060-8628, Japan
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Yoshiharu Hirabayashi
Information Initiative Center, Hokkaido University, Sapporo, 060-0811, Japan
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Kiyoshi Kato
Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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Satoshi Chiba
Japan Atomic Energy Agency (JAEA), Tokai, Naka, Ibaraki 319-1195, Japan