See also. 1  Discovery of cosmic microwave background radiation. 2  Generationârecombination noise. 3  Matched filter for noise reduction in modems. 4  Noise reduction and noise cancellation for audio and images. 5  Error correction for digital signals subject to noise. 6  Phonon noise.
The city of Greenville was incorporated in 1831 and adopted the Council-Manager form of government in 1976. The Council-Manager form consists of an elected City Council, which is responsible for policy making, and a professional City Manager, appointed by the council, who is responsible for administration.
Graham was laid out in 1849 as the county seat of the newly formed Alamance County, and was incorporated as a town in 1851; it became a city in 1961. It was named for William Alexander Graham, U.S. senator from North Carolina (1840â1843) and governor of North Carolina (1845â1849).