1. Information Systems and New Media, University of Siegen, 57072 Siegen, Germany
2. Smart Aging Research Centre, Tohoku University, Sendai 980-8577, Japan
3. AIST AI Research Centre, AIST Tokyo Waterfront, 3-4-7-Aomi Koto-ku, Tokyo 135-0064, Japan
4. Sarah Janböcke ODR GmbH on Behalf of Smart Aging Research Centre, Tohoku University, 45219 Essen, Germany
5. IMT Atlantique, Bretagne—Pays de la Loire, École Mines-Télécom, 44300 Nantes, France
6. IRCCS INRCA, 60124 Ancona, Italy
7. Dipartimento di Ingegneria Industriale e Scienze Matematiche, Università Politecnica delle Marche, 60121 Ancona, Italy