network noise temperature
121Positive feedback — Alarm or panic can spread by positive feedback among a herd of animals to cause a stampede. Positive feedback is energy taken from the output of a system and reapplied to the input, which is phase congruent with the input signal. A system… …
122Strain gauge — Typical foil strain gauge. The gauge is far more sensitive to strain in the vertical direction than in the horizontal direction. The markings outside the active area help to align the gauge during installation. A strain gauge (also strain gage)… …
123Roy Spencer (scientist) — Roy W. Spencer Ph.D. is a principal research scientist for the University of Alabama in Huntsville and the U.S. Science Team Leader for the Advanced Microwave Scanning Radiometer (AMSR E) on NASA’s Aqua satellite. He has served as senior… …
124News ticker — An example of a television news ticker, at the lower third of the screen. A news ticker (sometimes referred to as a crawler ) resides in the lower third of the television screen space on television news networks dedicated to presenting headlines… …
125earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …
126CenturyLink Field — WaMu Theater redirects here. For the theater in New York City formerly sponsored by Washington Mutual, see Madison Square Garden. CenturyLink Field …
127Airbreathing jet engine — An airbreathing jet engine (or ducted jet engine) is a jet engine propelled by a jet of hot exhaust gases formed from air that is drawn into the engine via an inlet duct. All practical airbreathing jet engines are internal combustion engines that …
128ear, human — ▪ anatomy Introduction organ of hearing and equilibrium that detects and analyzes noises by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium). The human ear, like …
