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List of Delta IV Heavy launches. Delta IV Heavy for Exploration Flight Test-1. The Delta IV Heavy ( Delta 9250H) was an expendable heavy-lift launch vehicle. When it was in service from 2004 to 2024, it was the largest type in the Delta IV family and was the world's second highest-capacity rocket in operation, behind SpaceX 's Falcon Heavy ...
It is called the delta function because it is a continuous analogue of the Kronecker delta function, which is usually defined on a discrete domain and takes values 0 and 1. The mathematical rigor of the delta function was disputed until Laurent Schwartz developed the theory of distributions, where it is defined as a linear form acting on functions.
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 ...
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Delta Phi Epsilon (ΔΦΕ or DPhiE) is an international sorority founded on March 17, 1917 at New York University Law School in Manhattan. It is one of 26 social sororities that form the National Panhellenic Conference (NPC). [2]
Dirichlet kernel. In mathematical analysis, the Dirichlet kernel, named after the German mathematician Peter Gustav Lejeune Dirichlet, is the collection of periodic functions defined as. where n is any nonnegative integer. The kernel functions are periodic with period . Plot restricted to one period of the first few Dirichlet kernels showing ...
McDonnell Douglas DC-X. The DC-X, short for Delta Clipper or Delta Clipper Experimental, was an uncrewed prototype of a reusable single-stage-to-orbit launch vehicle built by McDonnell Douglas in conjunction with the United States Department of Defense 's Strategic Defense Initiative Organization (SDIO) from 1991 to 1993.
Delta Burke (born July 30, 1956) is an American actress, producer, and author. From 1986 to 1991, she starred as Suzanne Sugarbaker in the CBS sitcom Designing Women , for which she received two Emmy Award nominations for Outstanding Lead Actress in a Comedy Series .