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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Pervasive Mob Comput. 2011 Dec;7(6):746–760. doi: 10.1016/j.pmcj.2011.09.002

Figure 2.

Figure 2

a) Accelerometer time series captured during walking in a sensor mounted on the forearm (3 second interval). b) Power spectrum.