EMG sensors Internet of Things (IoT) Lie group Parkinson’s disease Technology: general issues WBSN accelerometer activation patterns activity recognition ankle kinematics automatic detection of the FRP automotive radar back propagation cerebral palsy co-activation coefficient of variation cognitive engagement deep learning electrogoniometer embedded systems estimation model falls flexion-relaxation phenomenon gait variability gait-event detection gait-phase classification hemiplegia human activity recognition (HAR) inertial sensor knee