Sadanori Ito Shoichiro Iwasawa Megumu Tsuchikawa Yasuyuki Sumi Kenji Mase Yasuhiro Katagiri Kiyoshi Kogure Norihiro Hagita Implementation and Evaluation of Wearable Sensor Devices for Recording and Detecting Conversational Interaction. 130-137 2005 conf/iswc/2005 ISWC http://doi.ieeecomputersociety.org/10.1109/ISWC.2005.27 db/conf/iswc/iswc2005.html#ItoITSMKKH05