Clearly, it's an easier path: no debates over the location or conditions of confinement.

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With each page request, Silk dynamically determines a division of labor between the mobile hardware and Amazon EC2 (i.e. which browser sub-components run where) that takes into consideration factors like network conditions, page complexity and the location of any cached content.

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In the years ahead, however, many more astronomical spacecraft will choose to sit at this location because of the very stable conditions it enjoys.

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Additional considerations must be made for traffic volume, accident history in the particular location, number of lanes and other road conditions, such as the presence of hills and curves.

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What Amazon signals, I think, is the location and climatic conditions inside tomorrow's big arena of business competition.

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Anyone with something to add can enter a street address and leave a marker on the map at that location, providing a few lines of text about conditions at that spot.

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In 2004 it engaged in a partnership with Minnesota Department of Transportation, U.S., to equip 100 state vehicles with sensors to collect traffic-related data including vehicle speed, location, heading and even localised weather conditions, with the aim of developing the next generation of transportation and driver information systems.

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Predicting the location of the termination shock was hard, the researchers say, because the precise conditions in interstellar space are unknown.

BBC: Voyager impression (Nasa)