Uwe Kowalik Terumasa Aoki Hiroshi Yasuda BROAFERENCE - A Next Generation Multimedia Terminal Providing Direct Feedback on Audience's Satisfaction Level. 974-977 2005 conf/interact/2005 INTERACT http://dx.doi.org/10.1007/11555261_83 db/conf/interact/interact2005.html#KowalikAY05