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Aerospace Data Facility-Colorado ( ADF-C) or Space Delta 20 ( DEL 20) one of three satellite ground stations operated by the National Reconnaissance Office (NRO) and United States Space Force in the continental United States. [1] Located within Buckley Space Force Base in Aurora, Colorado, the facility is responsible for the command and control ...
Delta Sigma Theta Sorority, Inc. ( ΔΣΘ) is a historically African American sorority. The organization was founded by college-educated women dedicated to public service with an emphasis on programs that assist the African American community. Delta Sigma Theta was founded on January 13, 1913 by twenty-two women at Howard University in ...
Delta purchased the aircraft at a steep discount: $19.6m each, well below their $33.2m production cost, which led Boeing to accuse the company of dumping the aircraft. Delta would later increase its order to a total of 145 A220 aircraft. For its wide-body fleet, Delta acquired 25 Airbus A330neo and 42 of the newly introduced Airbus A350 ...
t. e. In thermodynamics, the Gibbs free energy (or Gibbs energy as the recommended name; symbol ) is a thermodynamic potential that can be used to calculate the maximum amount of work, other than pressure-volume work, that may be performed by a thermodynamically closed system at constant temperature and pressure.
History. Microsoft co-founder Paul Allen founded Apex Learning in 1997 for the purpose of applying for online courses and test prep material in grades 6–12. The company initially focused on Advanced Placement courses and test prep. [2] Within one year of operation, 200 students used the Apex platform. [citation needed]
δ. 15. N. In geochemistry, hydrology, paleoclimatology and paleoceanography, δ15N (pronounced "delta fifteen n") or delta-N-15 is a measure of the ratio of the two stable isotopes of nitrogen, 15 N: 14 N. [1]
The Convair F-102 Delta Dagger was an interceptor aircraft designed and produced by the American aircraft manufacturer Convair. A member of the Century Series , the F-102 was the first operational supersonic interceptor and delta-wing fighter operated by the United States Air Force (USAF).
t. e. In mathematical analysis, the Dirac delta function (or δ distribution ), also known as the unit impulse, [1] is a generalized function on the real numbers, whose value is zero everywhere except at zero, and whose integral over the entire real line is equal to one. [2] [3] [4] Since there is no function having this property, modelling the ...