Electronic Noses Sniff Out a Market or Two

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As the devices get smaller and prices come down, the applications are bound to multiply. "Miniaturization could significantly affect the e-nose market," says Harry Goldstein, who follows the business for Technical Insights. He imagines factories of the future filled with thousands of cheap, tiny sensors. "If there's a chemical spill, we could find out what's going on instantly instead of waiting until someone falls over."

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RAY KELLY, New York City Police Commissioner, on the arrest of a New Jersey man in one of the nation's most baffling missing-children cases, the disappearance more than three decades ago of 6-year-old Etan Patz.
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