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Experimental setup for assessing wireless sensor technology in classification of potentially disturbing wheelchair events. Superior/inferior (S/I) axes are y (inferior positive) for the chest IMU and x (superior positive) for the wheelchair IMU. Anterior/posterior (A/P) axes are z (posterior positive) for the chest IMU and y (posterior positive) for the wheelchair IMU. Medial/lateral (M/L) axes are x (medial positive) for the chest IMU and z (lateral positive) for the wheelchair IMU.
