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Tech_Frontiers_TinyDetectors_080811.appHeader = "<FONT SIZE=4><b>Fighting terrorism with technology<br><b></FONT><br>";
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Tech_Frontiers_TinyDetectors_080811[i++] = new Array("","Introduction","","http://msnbcmedia.msn.com/j/msnbc/Components/Photo/_new/080811-Detectors-5-hmed-02.hmedium.jpg","","Image: Charles Van Neste", "", "", "", "", "", "Jason K. Richards", "DOE/Oak Ridge National Laboratory", "273", "410", "#000000", "", "", "", "");
Tech_Frontiers_TinyDetectors_080811[i-1].body = "<b> <p style=\"font-size: 12pt; color: red\">Introduction</p> </b><p>Recently unveiled as part of the nation's anti-terrorism push, new devices are boasting smaller and more sophisticated sensors that can quickly detect explosives, radiation, chemicals and biological agents. At Oak Ridge National Laboratory, researcher Charles Van Neste (shown above) and colleagues have developed a new laser and sound-based method to identify potentially hazardous materials in the open air at a distance of more than 20 yards.<P ALIGN=RIGHT><i>&#8212; Bryn Nelson</i>";

Tech_Frontiers_TinyDetectors_080811[i++] = new Array("","Airport screenings","","http://msnbcmedia.msn.com/j/msnbc/Components/Photo/_new/Detector-1.hmedium.jpg","","Image: airport screening", "", "", "", "", "", "", "Courtesy of White House Office of Management and Budget", "273", "411", "#000000", "", "", "", "");
Tech_Frontiers_TinyDetectors_080811[i-1].body = "<b> <p style=\"font-size: 12pt; color: red\">Airport screenings</p> </b><p>Airport screeners check passengers and carry-on luggage for potential explosives or other hazardous substances. A new technology known as standoff photoacoustic spectroscopy could allow workers at airports and other sensitive locations to stand off at a distance and detect residue from TNT or other explosives.";

Tech_Frontiers_TinyDetectors_080811[i++] = new Array("","Harmful or harmless?","","http://msnbcmedia.msn.com/j/msnbc/Components/Photo/_new/Detector-2.vmedium.jpg","","Image: Alexander Graham Bell", "", "", "", "", "left", "", "Courtesy of Library of Congress", "298", "181", "#000000", "", "", "", "");
Tech_Frontiers_TinyDetectors_080811[i-1].body = "<b> <p style=\"font-size: 12pt; color: red\">Harmful or harmless?</p></b><p>Alexander Graham Bell, pictured in this portrait housed in the Library of Congress, first observed in the 1880s that certain frequencies of light can produce sound waves when pulsed onto a surface. With a version devised by Oak Ridge National Laboratory researchers, known as standoff photoacoustic spectroscopy, the signature sound can then be used to distinguish TNT or other explosives from harmless substances.";

Tech_Frontiers_TinyDetectors_080811[i++] = new Array("","Identifying explosives","","http://msnbcmedia.msn.com/j/msnbc/Components/Photo/_new/Detector-3.vmedium.jpg","","Image: standoff photoacoustic spectroscopy diagram", "", "", "", "", "left", "", "Graphic courtesy of Oak Ridge National Laboratory", "175", "198", "#000000", "", "", "", "");
Tech_Frontiers_TinyDetectors_080811[i-1].body = "<b> <p style=\"font-size: 12pt; color: red\">Identifying explosives</p></b><p>For the technique known as standoff photoacoustic spectroscopy, pulsed infrared  laser light (QCL in the diagram) can be reflected off a target and focused onto a quartz tuning fork sensor, producing a telltale vibration that reveals not only whether an explosive is present, but also which one it is.";

Tech_Frontiers_TinyDetectors_080811[i++] = new Array("","'Dirty bomb' detectors","","http://msnbcmedia.msn.com/j/msnbc/Components/Photo/_new/Detector-4.hmedium.jpg","","Image: Ephraim Fischbach, Jere Jenkins ", "", "", "", "", "", "David Umberger", "Purdue News Service", "273", "396", "#000000", "", "", "", "");
Tech_Frontiers_TinyDetectors_080811[i-1].body = "<b> <p style=\"font-size: 12pt; color: red\">'Dirty bomb' detectors</p></b><p>Purdue physics professor Ephraim Fischbach, at right, and nuclear engineer Jere Jenkins review radiation-tracking data as part of research to develop a system that would use sensor-equipped cell phones to detect and track radiation from &#147;dirty bombs&#148; or nuclear weapons. With GPS increasingly standard for cell phones, consumer networks could become de facto tracking systems.";

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