[paper] Identification of Environment Using Signals From Users, Yasuyuki Ishida; Niwat Thepvilojanapong; Ryohei Suzuki; Susannna Pirttikangas; Kaoru Sezaki; Yoshito Tobe , The International Workshop on Sensor Network Technologies for Information Explosion Era (SeNTIE 2009), Taipei, Taiwan, May 2009, 2009-05-00, (2009)