1. Government of Japan 2011 Annual Report on Aging Society http://www8.cao.go.jp/kourei/whitepaper/w-2013/zenbun/pdf/1s1s.pdf 2013
2. An analysis of problems of the development and installation of the Mimamori-care support camera system for persons with dementia in a group home;Sugihara;Sociotechnica,2010
3. Detection of abnormal action using image sequences for monitoring of aged persons;Seki;IEEJ Trans D,2005
4. Development of a sensing system for the estimation of the state of humans using infrared sensors arranged in a grid;Saito;IEEJ Trans E,2008
5. Development of a bathroom fall detection system using photodetectors;Kajiwara;IEEJ Trans E,2012