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Delta bond. In chemistry, delta bonds ( δ bonds) are covalent chemical bonds, where four lobes of one involved atomic orbital overlap four lobes of the other involved atomic orbital. This overlap leads to the formation of a bonding molecular orbital with two nodal planes which contain the internuclear axis and go through both atoms.
Delta Gamma ( ΔΓ ), commonly known as DG, is a women's fraternity in the United States and Canada with over 250,000 initiated members. [1] It has 150 collegiate chapters and more than 200 alumnae groups. [2] The organization's executive office is in Columbus, Ohio. [3] Delta Gamma is one of 26 national sororities under the umbrella ...
Female students at Brown University, approximately 45 miles from Tufts, created the women's fraternity Delta Sigma (local) in 1896. [5] Phi Gamma was a women's society established at the University of Maine in February 1897 and was the first sorority on campus. [6] [7] Its original members were Agnes Burnham, Autense Cousens, Susie Davis, Rena ...
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 ...
Mathematics. Δ, a difference of state between two before and after state schemas in the Z notation. δ {\displaystyle \delta } , the first Feigenbaum constant. Delta connective, a unary connective in t-norm fuzzy logics. Delta method for approximating the distribution of a function.
The empty delta sign is a radiologic sign seen on brain imaging which is associated with cerebral venous sinus thrombosis. It is usually seen on magnetic resonance imaging (MRI) or computed tomography (CT) scans with contrast. It is seen as dural wall enhancement in the absence of intra-sinus enhancement (there is no enhancement in the lumen of ...
Delta Dawn. " Delta Dawn " is a song written by musician Larry Collins and country songwriter Alex Harvey. [a] The first notable recording of the song was in 1971 by American singer and actress Bette Midler for her debut album. However it is best known as a 1972 top ten country hit for Tanya Tucker [1] and a 1973 US number one hit for Helen Reddy .
Delta method. In statistics, the delta method is a method of deriving the asymptotic distribution of a random variable. It is applicable when the random variable being considered can be defined as a differentiable function of a random variable which is asymptotically Gaussian .