New sensor upgrades artificial bomb sniffers
...niffing device they hope will improve detection of bombs and landmines. Although experts predict that a practical device is at least five years away from actual use at airports, on battlefields and elsewhere, the researchers say their new sensor will improve the sensitivity and reliability of current proto...Model predicting colorectal cancer screening suggests higher mortality for virtual colonoscopy
...eaths among those exposed to radiation from atomic bombs in the 1940s. Using this assumption, the Oregon model predicts 25 radiation related deaths per 100,000 associated with virtual colonoscopy. Overall, the model attributes nine procedure-related deaths per 100,000 to traditional colonoscopy, compared......inside people's shoes, bags and clothing for guns, bombs and contraband. T-rays lie between microwaves, whose wavelengths measure from centimeters to millimeters, and light, with wavelengths measured in nanometers, or billionths of a meter. The gap between -- the so-called terahertz gap -- contains wavelen...