Toward Useful Services for Elderly and People with Disabilities 9th International Conference on Smart Homes and Health Telematics, ICOST 2011, Montreal, Canada, June 20-22, 2011. Proceedings - Abdulrazak, Bessam; Giroux, Sylvain; Bouchard, Bruno; Pigot, Hélène; Mokhtari, Mounir (Springer Berlin Heidelberg : Imprint: Springer, 2011)