Meeting challenges of activity recognition for ageing population in real life settings. - Aimilia Papagiannaki; Evangelia I. Zacharaki; Konstantinos Deltouzos; Roberto Orselli; Anne Freminet; Sibora Cela; Elena Aristodemou; Marina Polycarpou; Marina Kotsani; Athanase Benetos; John Ellul; Vasileios Megalooikonomou (HealthCom, 2018)