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*Ryohei Takanami
New Industrial Research and Development Center, Osaka Sangyo Univ.
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Xiaming Chin
Dept. of civil Engineering, Osaka Sangyo Univ. graduate school
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Hiroaki Ozaki
Dept. of Civil Engineering, Osaka Sangyo Univ.
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Shintarou Hayashi
Dept. of Civil Engineering, Osaka Sangyo Univ.