acoustic locating system
41radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
42Signals intelligence — SIGINT redirects here. For the UNIX signal, see SIGINT (POSIX). RAF Menwith Hill, a large site in the United Kingdom, part of ECHELON and the UK USA Security Agreement. Signals intelligence (often contracted to SIGINT) is intelligence gathering… …
43Flagstaff, Arizona — Infobox Settlement official name = City of Flagstaff settlement type = City nickname = City of Seven Wonders website = http://www.flagstaff.az.gov/ imagesize = image caption = image mapsize = 250px map caption = Location in Coconino County the… …
44Tweeter — A tweeter is a loudspeaker designed to produce high frequencies, typically from around 2,000 hertz to 20,000 hertz (20,000 Hz, generally considered to be the upper limit of the human hearing). A few tweeters can manage response up to an octave or …
45mechanoreception — See mechanoreceptor. * * * Ability to detect and respond to mechanical stimuli in one s environment. A slight deformation of a mechanoreceptive neuron causes an electric charge at its surface, activating a response. Mechanoreceptors in pain spots …
46Counter-sniper tactics — A squad marksman with 2nd Battalion, 7th Cavalry Regiment, 4th Brigade Combat Team, 1st Cavalry Division, scans for enemy snipers at the Nineveh ancient ruins in Mosul, Iraq, April 4, 2007. Counter sniper tactics involves tactics used by a sniper …
47cetacean — cetaceous, adj. /si tay sheuhn/, adj. 1. belonging to the Cetacea, an order of aquatic, chiefly marine mammals, including the whales and dolphins. n. 2. a cetacean mammal. [1830 40; < NL Cetace(a) name of the order (see CET , ACEA) + AN] * * *… …
48Electronic article surveillance — For the electronic version of a journal article, see electronic article. Electronic article surveillance (EAS) is a technological method for preventing shoplifting from retail stores or pilferage of books from libraries. Special tags are fixed to …
49North Pacific right whale — North Pacific right whale[1] Si …
50Ground-penetrating radar — (GPR) is a geophysical method that uses radar pulses to image the subsurface. This non destructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and detects the reflected signals from… …
