Shigeyoshi Iizuka Yurika Katagiri Design for Confident Communication of Information in Public Spaces. 51-58 2007 conf/hci/2007-8 HCI (8) http://dx.doi.org/10.1007/978-3-540-73345-4_7 db/conf/hci/hci2007-8.html#IizukaK07