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Tourists who drift aimlessly during a sightseeing tour are moving randomly - just like electrons that move from one atom to the next. To obtain a better understanding of these random motions it is often useful to reduce their complexity. Physicists do this by simulating random walks

In what's becoming a predictable move, Syria has shut down Internet access in an attempt to quash the organization of a national uprising, dubbed Children's Friday and inspired in part by a now viral YouTube video of the body of a tortured and murdered 13-year-old boy . As reported by Renesys , a business communications intelligence firm that also chronicled the Net shut-down in Egypt , Syria began to shut its Net access at 6:35 a.m