It markets brain scanning equipment to neurologists for imaging Alzheimer's suspects.

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Other measures have included closing the Sangatte refugee camp, tightening security at the Channel Tunnel and using scanning equipment that can find people hiding inside vehicles.

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But overall, consumer and business adoption of these technologies remains limited, due in part either to expense (high-end retinal scanning equipment can be costly) or lack of awareness.

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Caught in the middle is GE's medical division, the old home of current chief Jeffrey Immelt and the biggest seller of X-ray, MRI, ultrasound and CT-scanning equipment in the world.

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The scanning equipment weighed some 80kg and, for the most part, was being transported to the experiment sites by camel - a fitting mode of transport for such state-of-the-art kit.

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This will include scanning and speech synthesiser equipment and hand-held spell checkers - and in some cases, pupils will be able to keep equipment for use in work when they leave school.

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Google will not discuss its proprietary scanning technology, but, rather than investing in page-turning equipment, the company employs people to operate the machines, I was told by someone familiar with the process.

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