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A radar beacon (racon) is a device that returns a distinctive signal when triggered by a radar, providing range, bearing and identification information. Learn about the principle of operation, the characteristics, the applications and the proposal for enhanced RACON.
Track while scan (TWS) is a radar mode that tracks multiple targets while scanning the airspace. Learn about its development, features, and applications, from the Soviet B-200 missile system to modern phased-array radars.
Ambient awareness (AmA) is a term used by social scientists to describe a form of peripheral social awareness through social media. This awareness is propagated from relatively constant contact with one's friends and colleagues via social networking platforms on the Internet. The term essentially defines the sort of omnipresent knowledge one ...
A ground proximity warning system (GPWS) is a device that alerts pilots if their aircraft is in danger of flying into the ground or an obstacle. GPWS can issue warnings such as "PULL UP" when the aircraft is in certain flying configurations or modes.
DEFCON is a system of five levels of readiness for the US Armed Forces, ranging from normal to nuclear war. Learn about the definition, history, and examples of DEFCON levels, and how they differ from other similar systems.
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.
Rayon, also called viscose or sabra silk, is a textile fiber made from natural sources of regenerated cellulose, such as wood and related agricultural products. Learn about its history, production methods, types, grades, and uses in clothing and other purposes.
The salience network is a large scale network of the human brain that detects and filters salient stimuli, and switches between the default mode network and central executive network. It involves the anterior insula, dorsal anterior cingulate cortex, and other regions, and is implicated in various psychiatric disorders.