Impact of the face angle to traveling trajectory during the riding standing-type personal mobility deviceJeyeon Kim, Kenta Sato, Naohisa Hashimoto, Alexey Kashevnik, Kohji Tomita, Seiichi Miyakoshi, Yusuke Takinami, Osamu Matsumoto and Ali BoyaliMATEC Web Conf., 161 (2018) 03001DOI: https://doi.org/10.1051/matecconf/201816103001