fixed-gain filtering
41Anechoic chamber — An anechoic chamber An anechoic chamber (an echoic meaning non echoing or echo free) is a room designed to stop reflections of either sound or electromagnetic waves. They are also insulated from exterior sources of noise. The combination of both… …
42Weather radar — in Norman, Oklahoma with rainshaft …
43Valve transmitters — Most high power transmitter amplifiers are of valve construction because of the high power required.Anode circuitsSince valves are designed to operate with much higher resistive loads than solid state devices, the most common anode circuit is a… …
44Space-based solar power — Left: Part of the solar energy is lost on its way through the atmosphere by the effects of reflection and absorption. Right: Space based solar power systems convert sunlight to microwaves outside the atmosphere, avoiding these losses, and the… …
45Ambulance — For other uses, see Ambulance (disambiguation) …
46Optical cavity — An optical cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser… …
47Radar MASINT — is one of the subdisciplines of Measurement and Signature Intelligence (MASINT) and refers to intelligence gathering activities that bring together disparate elements that do not fit within the definitions of Signals Intelligence (SIGINT),… …
48Buddhism — Buddhist, n., adj. Buddhistic, Buddhistical, adj. Buddhistically, adv. /booh diz euhm, bood iz /, n. a religion, originated in India by Buddha (Gautama) and later spreading to China, Burma, Japan, Tibet, and parts of southeast Asia, holding that… …
49Don Valley Parkway — The DVP Route of Heroes …
50Fall of Saigon — Infobox Military Conflict conflict=Fall of Saigon partof=Vietnam War caption=This well known photo taken by Hubert van Es shows South Vietnamese civilians scrambling to board a CIA Air America helicopter during the U.S. evacuation of Saigon. date …
