One of the cool things about the new Apple TV Remote is that it has a built-in accelerometer, and similar to mobile devices, this allows you to guage the device's position/orientation in space. Essentially, on either a mobile device or the remote control, the accelerometer makes three discrete measurements based on the orientation and center point of the device. Accelerometer events The accelerometer event returns several useful values, including: event.name -- This property will always be "accelerometer". event.isShake -- This property will be true if a rapid movement of the device is detected. event.xGravity / event.yGravity / event.zGravity -- These events are probably the most useful. They are normalized, so you get a value between -1.0 and 1.0. These values are also smoothed out to adjust for micro-movements and prevent jerky actions. event.xInstant, event.yInstant, event.zInstant -- These values report the change since the last event, for instance the current event

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Step counting has long been used as a method of measuring distance. Starting in the mid-1900s, researchers became interested in using steps per day to quantify ambulatory physical activity. This line of research gained momentum after 1995, with the introduction ...