Chin-De Liu Pau-Choo Chung Yi-Nung Chung Monique Thonnat Understanding of human behaviors from videos in nursing care monitoring systems. 91-103 2007 16 J. High Speed Networks 1 http://iospress.metapress.com/content/6v9w9tdgaawjt0ud/ db/journals/jhsn/jhsn16.html#LiuCCT07