burst amplifier
71Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …
72Known Space — is the fictional setting of several science fiction novels and short stories written by author Larry Niven. It has also in part been used as a shared universe in the Man Kzin Wars spin off anthologies sub series.The epithet Known Space is an in… …
73Strategic Defense Initiative — Organization SDIO Agency overview Formed 1984 Dissolved 1993 (renamed) Superseding a …
74John Logie Baird — Infobox Engineer caption = name = John Logie Baird nationality = Scottish birth date = 13 August 1888 birth place = Helensburgh, Dunbartonshire, Scotland death date = 14 June 1946 death place = Bexhill on Sea education = spouse = parents =… …
75Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal …
76Noise — This article is about noise as an unwanted phenomenon. For other uses, see Noise (disambiguation). NASA researchers at Glenn Research Center conducting tests on aircraft engine noise in 1967 In common use, the word noise means any unwanted …
77Noise figure — (NF) is a measure of degradation of the signal to noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. The noise figure is defined as the ratio of the output noise power of a device to the portion thereof attributable… …
78Civil defense siren — Federal Signal Thunderbolt 1003 Civil Defense siren. A civil defense siren (also referred to as an air raid siren, tornado siren, tsunami siren, fire siren/whistle, flood siren, weather siren, time/curfew siren, or other outdoor warning siren) is …
79Addition — is the mathematical process of putting things together. The plus sign + means that two numbers are added together. For example, in the picture on the right, there are 3 + 2 apples meaning three apples and two other apples which is the same as… …
80Michael Gira — performing at The Doug Fir Lounge, Portland, OR. March 03, 2009. Background information Birth name Michael Rolfe Gira …
