Affiliation: | 1. Department of Mechanical Engineering, Graduate School of Engineering, Division of Fundamental Engineering, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan;2. Department of Mechanical Engineering, Vocational College, Universitas Gadjah Mada, Sekip Unit IV Bulaksumur, Yogyakarta 55281, Indonesia;3. Department of Electrical and Informatic Engineering, Vocational College, Universitas Gadjah Mada, Sekip Unit IV Bulaksumur, Yogyakarta 55281, Indonesia |