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*sanath De silva
Graduate School of Science and Engineering, Saitama Univ., Japan Dept. of Mechanical and Manufacturing, Univ. of Ruhuna, Sri Lanka
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Uma Maheswari Rajagopalan
Dept. Mech, Eng. Faculty of Engineering. Shibaura Institute of Technology, Japan
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Li Danyang
Graduate School of Science and Engineering, Saitama Univ., Japan
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Hirofumi Kadono
Graduate School of Science and Engineering, Saitama Univ., Japan