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Schematic of an AGC used in the analog telephone network; the feedback from output level to gain is effected via a Vactrol resistive opto-isolator.. Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input.
Satellite loop of Typhoon Gaemi skirting the coast before making landfall in the northeastern coast of Taiwan on July 24. After many weeks of inactivity, on July 13, a tropical depression formed east of Vietnam, designated as 03W. Shortly after, it tracked into Vietnam, dissipating soon after.
Powerful Typhoon Mawar barreled over Guam on Wednesday with fierce winds and a devastating storm surge. AccuWeather meteorologists say the cyclone was likely the strongest in decades to impact the ...
It is an intermediate mass star that has left the red-giant branch before its core became degenerate and is now in a blue loop. [66] Models of stellar evolution in the blue loop phase show that the length of the blue loop is strongly affected by rotation and mixing effects inside the star.
The 1992 Atlantic hurricane season was a significantly below average season for overall tropical or subtropical cyclones as only ten formed. Six of them became named tropical storms, and four of those became hurricanes; one hurricane became a major hurricane (Category 3 to 5 strength on the Saffir–Simpson scale).
The storm's eye became visible on microwave satellite imagery before making landfall in Wanning, Hainan. It soon reached its peak intensity that day, with 10-minute sustained winds of 110 km/h (70 mph) and a minimum barometric pressure of 980 hPa (28.94 inHg).
Cirrus are wispy clouds made of long strands of ice crystals that are described as feathery, [1] hair-like, or layered in appearance. [2] First defined scientifically by Luke Howard in an 1803 paper, [3] their name is derived from the Latin word cirrus, meaning 'curl' or 'fringe'. [4]
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