It's also unclear if the blue light seen atop the controller serves a function -- a stand-in for Move support, perhaps?

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In the hand the controller feels light, and it feels comfortable.

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The controller also features a light bar, which means a new PlayStation camera can more easily track the device for motion control.

WSJ: Sony shows PlayStation 4 capabilities, but no box

In another experiment the researchers wake up sleeping mice by sending a light signal to the hypothalamus, the brain's controller of sleep-wake cycles.

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Their solar panel system is integrated with the lights via the room controller, drawing power from man-made and natural light.

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The problem first came to light when a member of the public contacted Basildon and Thurrock Hospital Foundation Trust's internal data controller in November 2010.

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