Tsutomu Terada Masahiko Tsukamoto Keisuke Hayakawa Tomoki Yoshihisa Yasue Kishino Atsushi Kashitani Shojiro Nishio Ubiquitous Chip: A Rule-Based I/O Control Device for Ubiquitous Computing. 238-253 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3001&spage=238 2004 conf/pervasive/2004 Pervasive db/conf/pervasive/pervasive2004.html#TeradaTHYKKN04