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Fuminao Shimizu
Department of Electronic Engineering, College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki, Fukushima 970
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Shozo Sawada
Department of Electronic Engineering, College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki, Fukushima 970
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Masaaki Takashige
Department of Electronic Engineering, College of Science and Engineering, Iwaki Meisei University, 5–5–1 Iino, Chuohdai, Iwaki, Fukushima 970