Naotake Hirasawa Tomonori Shibagaki Hideaki Kasai Understanding Requirements of Ubiquitous Application in Context of Daily Life. 45-50 2007 conf/hci/2007-8 HCI (8) http://dx.doi.org/10.1007/978-3-540-73345-4_6 db/conf/hci/hci2007-8.html#HirasawaSK07