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The full name is Program for Atomic and Molecular Direct Iterative Relativistic All-electron Calculations, in short PAM DIRAC. It is capable of calculating various molecular properties using the Hartree–Fock , MP2 , density functional theory , configuration interaction and coupled cluster electronic structure theories.
Dirac (and Dirac Pro, a subset standardised as SMPTE VC-2) is an open and royalty-free video compression format, specification and software video codec developed by BBC Research & Development. [ 4 ] [ 5 ] [ 6 ] Dirac aimed to provide high-quality video compression for Ultra HDTV and competed with existing formats such as H.264 .
In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form, or including electromagnetic interactions, it describes all spin-1/2 massive particles, called "Dirac particles", such as electrons and quarks for which parity is a symmetry.
In mathematical physics, the Gordon decomposition [1] (named after Walter Gordon) of the Dirac current is a splitting of the charge or particle-number current into a part that arises from the motion of the center of mass of the particles and a part that arises from gradients of the spin density.
Eighteen states and the ACLU filed lawsuits seeking to prevent President Trump from denying citizenship to children born in the U.S. to non-citizens.
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1315 ahead. Let's start with a few hints.
It will feature a live blog, analysis from Karl and a preview from 538 on what Trump might tackle in his first 100 days. How to watch Donald Trump's 2nd inauguration originally appeared on abcnews ...
A Dirac comb is an infinite series of Dirac delta functions spaced at intervals of T. A so-called uniform "pulse train" of Dirac delta measures, which is known as a Dirac comb, or as the Sha distribution, creates a sampling function, often used in digital signal processing (DSP) and discrete time signal analysis