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Delta modulation ( DM or Δ-modulation) is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information where quality is not of primary importance. DM is the simplest form of differential pulse-code modulation (DPCM) where the difference between successive samples is encoded into n-bit data ...
The nabla symbol. The nabla is a triangular symbol resembling an inverted Greek delta: [1] or ∇. The name comes, by reason of the symbol's shape, from the Hellenistic Greek word νάβλα for a Phoenician harp, [2] [3] and was suggested by the encyclopedist William Robertson Smith in an 1870 letter to Peter Guthrie Tait. [2] [4] [5] [6] [7]
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.
d'Alembert operator. In special relativity, electromagnetism and wave theory, the d'Alembert operator (denoted by a box: ), also called the d'Alembertian, wave operator, box operator or sometimes quabla operator [1] ( cf. nabla symbol) is the Laplace operator of Minkowski space. The operator is named after French mathematician and physicist ...
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 ...
Theta Delta Sigma Society, Inc. (ΘΔΣ) is a national gender inclusive multicultural fraternal organization founded in 2001 at the University at Buffalo (SUNY). Theta Delta Sigma is a non-partisan and non-sectarian organization that has been "a partner in the values-based fraternal movement".
Colt Delta Elite. The Colt Delta Elite is a modified series 80 M1911 pistol chambered for the 10mm Auto cartridge. It was first introduced in 1987 by the Colt's Manufacturing Company. [1] The Delta Elite is credited as being the first firearm produced by a major manufacturer to chamber the 10mm.
Delta-. v. (physics) In general physics, delta-v is a change in velocity. The Greek uppercase letter Δ (delta) is the standard mathematical symbol to represent change in some quantity. Depending on the situation, delta- v can be either a spatial vector (Δ v) or a scalar (Δ v ). In either case it is equal to the acceleration (vector or scalar ...