He obtained his M.S. degree in medical informatics from the University of Heidelberg, Germany, and his Ph.D. degree in health informatics from the University of Minnesota. His research interests include the design and evaluation of home-based technologies for older adults and patients with chronic conditions and disabilities, smart homes and ambient assisted living applications and the use of telehealth in home care and hospice. He is the Chair of the International Medical Informatics Assosiation (IMIA) Working Group on Smart Homes and Ambient Assisted Living and the Chair of the American Medical Informatics Association (AMIA) Knowledge in Motion Working Group.