365 Index A accelerometers 246, 247, 248, 261, 263, 265 access control 30, 31, 32, 44, 46, 48 accountability 24, 29, 42 activity monitoring 248 actor-network theory (ANT) 121 ad hoc networks 116 Advanced Audio Distribution Profile (A2DP) 276, 277 aging concept 93 assisted living facility (ALF) 144, 153, 155, 159 assistive medical devices 80 asynchronous communications 22 asynchronous monitoring 7 atrial fibrillation 7 audit trail 48 authentication 33, 34, 38, 39, 46, 48, 99, 101, 103, 104, 107, 108, 109, 110, 116, 117 authorization 116 availability 94, 99, 109