Head-tracking ensures the position of the player and sends the virtual ball into the right area of the net with each movement.

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What GPS does outside, tracking and locating your position, Wifarer, with IPS does inside.

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Earlier this year Narayen picked up another audience-tracking tech firm, called Demdex, to further entrench his position among companies that manage, analyze and act upon what people do on the Web, particularly around selling stuff.

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An FAA spokesman said the agency was tracking the airplane on radar, so it knew the aircraft's position during the period without radio contact.

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The Justice Department said Mr. Liang's position at the FDA gave him access to the agency's password-protected tracking system used to manage drug applications and drug-safety issues.

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The Wii U controller contains the same motion tracking hardware as a Nintendo Wiimote, which means the system can track its relative position at all times, and update the controller screen depending on its orientation.

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For example, if your goal is to get a job as an advertising coordinator, you will probably come across the same keywords (i.e. accounts, AdWords, media planning, sales, marketing, tracking, supporting) over and over again in job postings for that kind of position.

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Keane dismissed reports that he had been tracking former Liverpool right-back Steve Finnan, claiming he was happy with his options in that position.

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Garmin's market breadth in the GPS industry is second to none, having developed innovative products and established a leadership position in each of the markets it serves, including automotive, aviation, marine, fitness, outdoor recreation, tracking, and wireless applications.

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