For example, experienced gamers search more thoroughly than non-gamers, leading to better change detection performance.

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Blinkx uses speech recognition, visual analysis and scene change detection, which enable a more accurate search as well as the ability to search within videos for specific words or people.

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Seasoned criminals can, of course, figure out such rules and change their behaviour in an attempt to avoid detection.

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Iranian activists hailed the move as a valuable change that would make it easier for dissidents in Iran to organize, communicate and avoid detection by their government.

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He and Siddique Khan would change e-mail addresses frequently, informing each other of the new addresses in code to prevent detection.

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