Kazuya Mera Yoshiaki Kurosawa Takumi Ichimura Emotion Oriented Intelligent System for Elderly People. 1128-1135 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3214&spage=1128 2004 conf/kes/2004-2 KES db/conf/kes/kes2004-2.html#MeraKI04