Yuji Tasaki(Department of Materials Engineering, Nagaoka National College of Technology, 888 Nishikatagai, Nagaoka, Niigata 940-8532, Japan)
Shungo Toyama( Department of Materials Engineering, Nagaoka National College of Technology, 888 Nishikatagai, Nagaoka, Niigata 940-8532, Japan) | Shungo Toyama