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This followed the retirement of Delta II in 2018 and single-stick (non-Heavy) variants of the Delta IV in 2019. With the start of 2024, Vulcan Centaur took its first flight in time to maintain continuity of ULA's service in the heavy-lift launch vehicle market before the Delta IV Heavy program came to an end three months later on April 9, 2024.
Delta Air Lines is a major American airline. [1] [2] The company's history began with the world's first aerial crop dusting operation called Huff Daland Dusters Inc., founded in 1925 in Macon, Georgia [3] to combat the boll weevil infestation of cotton crops. [4] C.E. Woolman, general manager and later Delta's first CEO, led a group of ...
Single delta potential. The time-independent Schrödinger equation for the wave function ψ(x) of a particle in one dimension in a potential V(x) is. where ħ is the reduced Planck constant, and E is the energy of the particle. The delta potential is the potential. where δ(x) is the Dirac delta function. It is called a delta potential well if ...
Web portal. A web portal is a specially designed website that brings information from diverse sources, like emails, online forums and search engines, together in a uniform way. Usually, each information source gets its dedicated area on the page for displaying information (a portlet ); often, the user can configure which ones to display.
The " Cornfield Bomber " is the nickname given to a Convair F-106 Delta Dart of the United States Air Force 's 71st Fighter-Interceptor Squadron which made an unpiloted landing in a farmer's field in Montana in 1970. Suffering only minor damage after the pilot had ejected from the aircraft during a training mission gone awry, the aircraft was ...
The Dassault Mirage 2000 is among the most successful delta-winged fighter jets, being used by many countries to this day. A delta wing is a wing shaped in the form of a triangle. It is named for its similarity in shape to the Greek uppercase letter delta (Δ). Although long studied, it did not find significant applications until the Jet Age ...
The Yangtze Delta or Yangtze River Delta ( YRD, Chinese: 长江三角洲 or simply Chinese: 长三角 ), previously known as the Shanghai Economic Zone, is a triangle-shaped megalopolis generally comprising the Wu -speaking areas of Shanghai, southern Jiangsu, northern Zhejiang, southern Anhui. The area lies in the heart of the Jiangnan region ...
Delta Kappa Epsilon (ΔΚΕ), commonly known as DKE or Deke, is one of the oldest fraternities in the United States, with fifty-six active chapters and five active colonies across North America. It was founded at Yale College in 1844 by fifteen sophomores who were discontented with the existing fraternity order on campus.