| http://www.w3.org/ns/prov#value | - But the greatest impact of such devices ??? which more than a half-million students are using this fall on several thousand college campuses ??? may be cultural: they have altered, perhaps irrevocably, the nap schedules of anyone who might have hoped to catch a few winks in the back row, and made it harder for them to respond to text messages, e-mail and other distractions.
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