1. a Flow Japan, 4-129 Kamiyashiro, Meito-ku, Nagoya, Aichi 465-0025, Japan;, Email: jeon@flowcorp.com
2. b Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan
3. c Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan