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Ab initio quantum chemistry program
Dirac (named after Paul Dirac; own notation DIRAC) is a relativistic ab initio quantum chemistry program. The full name is Program for Atomic and Molecular
Dirac_(software)
British physicist (1902–1984)
Paul Adrien Maurice Dirac (/dɪ.ˈræk/, dih-RAK; 8 August 1902 – 20 October 1984) was a British theoretical physicist who is considered to be one of the
Paul_Dirac
Video compression format
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
Dirac (video compression format)
Dirac_(video_compression_format)
Topics referred to by the same term
quantum physics. Dirac may also refer to: DiRAC, Distributed Research using Advanced Computing, a supercomputing facility Dirac (software), a relativistic
Dirac_(disambiguation)
GitLab. "DIRAC: Program for Atomic and Molecular Direct Iterative Relativistic All-electron Calculations". www.diracprogram.org. "Documentation Dirac". www
List of computational chemistry software
List_of_computational_chemistry_software
Acoustics process
software. Notable examples are IMAX cinemas, which use Audyssey MultEQ XT32, while Datasat processors (found in all DTS:X rooms) have Dirac software.
Digital_room_correction
open-source software (FOSS) packages, computer software licensed under free software licenses and open-source licenses. Software that fits the Free Software Definition
List of free and open-source software packages
List_of_free_and_open-source_software_packages
integral Dirac delta function Dirac comb Dirac measure Dirac operator Dirac algebra 5997 Dirac, an asteroid The various Dirac Medals Dirac (software) DiRAC supercomputing
List of things named after Paul Dirac
List_of_things_named_after_Paul_Dirac
Mathematical computing environment
r a c ( w − 1 ) ) {\displaystyle \mathrm {I} \pi \,(\mathrm {Dirac} (w+1)-\mathrm {Dirac} (w-1))} Find functions f that satisfy the integral equation
Maple_(software)
Open container format by Xiph.Org Foundation
2002). Dirac: a free and open video format developed by the BBC. Uses wavelet encoding. Lossless Dirac: a part of the specification of dirac covers lossless
Ogg
Output of a dynamic system when given a brief input
frequencies (see the Fourier transform of the Dirac delta function, showing infinite frequency bandwidth that the Dirac delta function has), the impulse response
Impulse_response
Free and open-source software and server
Client) is a free and open-source, portable, cross-platform media player software and streaming media server developed by the VideoLAN project. VLC is available
VLC_media_player
is the study of Dirac operators, and Dirac type operators in analysis and geometry, together with their applications. Examples of Dirac type operators
Clifford_analysis
US-based software and services company
American publicly traded company that develops data integration and analytics software. Palantir is headquartered in Miami, Florida, and was founded in 2003 by
Palantir
of video players compares general and technical information for notable software media player programs. For the purpose of this comparison, video players
Comparison of video player software
Comparison_of_video_player_software
Chemistry portal List of software for Monte Carlo molecular modeling List of computational physics software Comparison of software for molecular mechanics
List of quantum chemistry and solid-state physics software
List_of_quantum_chemistry_and_solid-state_physics_software
implementation of the Theora format, based on VP3, part of the Ogg Project Dirac as dirac-research, a wavelet based codec created by the BBC Research, and Schrödinger
List_of_open-source_codecs
Open-source toolkit for cheminformatics
chemistry and solid-state physics software Open source ABINIT ACES (CFOUR) AIMAll BigDFT COLUMBUS CONQUEST CP2K Dalton DIRAC DP code FLEUR FreeON MADNESS MOPAC
RDKit
Multimedia framework
FFmpeg is a free and open-source software project consisting of a suite of libraries and programs for handling video, audio, and other multimedia files
FFmpeg
Physical theory with fields invariant under the action of local "gauge" Lie groups
electron field. The bare-bones action that generates the electron field's Dirac equation is S = ∫ ψ ¯ ( i ℏ c γ μ ∂ μ − m c 2 ) ψ d 4 x {\displaystyle {\mathcal
Gauge_theory
In mathematics, the incomplete Fermi-Dirac integral, named after Enrico Fermi and Paul Dirac, for an index j {\displaystyle j} and parameter b {\displaystyle
Incomplete Fermi–Dirac integral
Incomplete_Fermi–Dirac_integral
Α video codec is software or a device that provides encoding and decoding for digital video, and which may or may not include the use of video compression
Comparison_of_video_codecs
Non-mathematical introduction
notion of quantum view". In 1931, Dirac proposed the existence of particles that later became known as antimatter. Dirac shared the Nobel Prize in Physics
Introduction to quantum mechanics
Introduction_to_quantum_mechanics
Free lossy video compression format
theora. Free and open-source software portal AV1 (open and royalty-free video coding format) Comparison of video codecs Dirac (video compression format)
Theora
Methods of mathematical approximation
of quantum mechanics in 20th century atomic and subatomic physics. Paul Dirac developed quantum perturbation theory in 1927 to evaluate when a particle
Perturbation_theory
American defense manufacturing company
hardware production. Alongside Palantir, 8VC, General Catalyst, Oklo Inc., Dirac and Atomic Industries, Hadrian is a founding member of the New American
Hadrian_Automation
Chinese-American physicist (1963–2018)
received numerous international awards, including the Buckley Prize, the Dirac Medal and Prize, the Europhysics Prize, the Physics Frontiers Prize and
Shoucheng_Zhang
Molecular modeling software
Glide is a molecular modeling software for docking of small molecules into proteins and other biopolymers. It was developed by Schrödinger, Inc. Kirkpatrick
Glide_(docking)
Algebra of 4D spacetime
A{\widetilde {J}}\rangle _{0\oplus 3}\,,} which is a real scalar invariant. The Dirac equation, for an electrically charged particle of mass m and charge e, takes
Algebra_of_physical_space
Intrinsic quantum property of particles
the Dirac equation, rather than being a more nearly physical quantity, like orbital angular momentum L). Nevertheless, spin appears in the Dirac equation
Spin_(physics)
Implementation of Microsoft Silverlight for Unix-based operating systems
allowed Moonlight to work with pluggable open codecs, such as Theora and Dirac. Preview releases of Moonlight 4.0, targeting Silverlight 4 compatibility
Moonlight_(runtime)
Class of mathematical software
Tensor software is a class of mathematical software designed for manipulation and calculation with tensors. SPLATT is an open source software package for
Tensor_software
BLYP, B3LYP, EDF1, EDF2, M06, ωB97X-D Exchange functionals: HF, Slater-Dirac, Becke88, Gill96, GG99, B(EDF1), PW91 Correlation functionals: VWN, LYP
Spartan_(chemistry_software)
Theoretical physicist (1939–2023)
November 8, 1939 – June 14, 2023) was an American theoretical physicist and Dirac Medallist. Born in Lubliniec, Poland in 1939 to a Ukrainian family, the
Roman_Jackiw
List of computer file compression formats
Media Video) FFmpeg (decoder only) NVDEC (for NVIDIA GPU) Dirac (SMPTE 2042-1) Schrödinger dirac-research FFmpeg (decoder only) Alliance for Open Media AV1
List_of_codecs
Setting of relativistic physics in geometric algebra
coordinate-free formulation for all of relativistic physics, including the Dirac equation, Maxwell equation and general relativity" and "reduces the mathematical
Spacetime_algebra
Audio and video transcoder
various types into the free Ogg Vorbis audio format, and the Theora, VP8 and Dirac video formats. It supports Ogg, Matroska and WebM containers for output
OggConvert
2021 Microsoft operating system version
functioning properly or not working at all; e.g., Asphalt 8 and Dirac audio improvement software (if cridspapo.dll is utilized). The basic system requirements
Windows_11
Business incubator in Cambridge, United Kingdom
A second phase, Dirac House was completed in July 1989, and the self-contained Jeffreys Building was completed in February 1990. Dirac House is named after
St_John's_Innovation_Centre
Greek non-profit space exploration foundation
two identical 3U CubeSats, named LAMARR (after Hedy Lamarr) and DIRAC (after Paul Dirac), flying in close proximity of each other. The mission is supported
Libre_Space_Foundation
Library of multimedia codecs
only) CineForm (decoding only) Cinepak Creative YUV (CYUV, decoding only) Dirac DNxHD Duck Corporation Truemotion 1, 2, and RT codecs (decoding only) FFV1
Libavcodec
Electron trajectories in electromagnetic fields
derive effects of magnetic structures to charged particles starting from the Dirac equation. As electrons can exhibit non-particle (wave-like) effects such
Electron_optics
Unconventional units of measurement intended as humor
Physicist Paul Dirac was known among his colleagues for his precise yet taciturn nature. His colleagues in Cambridge jokingly defined a unit of a dirac which was
List of humorous units of measurement
List_of_humorous_units_of_measurement
26 December 2021. "FAQ – Diracvideo". Dirac Video Compression. Archived from the original on 15 April 2009. "Dirac". SourceForge (Repository). 4 June 2013
Comparison of video container formats
Comparison_of_video_container_formats
Image sharpening technique
is a simple linear image operation—a convolution by a kernel that is the Dirac delta minus a gaussian blur kernel. Deconvolution, on the other hand, is
Unsharp_masking
Open-source AAC codec
Licensing or directly from the patent owners, and therefore FDK AAC Codec software may already be covered under those patent licenses when it is used for
Fraunhofer_FDK_AAC
Video compression format, succeeds H.264/MPEG-4 AVC
open-source codecs Versatile Video Coding – a codec develop by MPEG and ITU Dirac (video compression format) – an open format that is being developed by the
High_Efficiency_Video_Coding
Superimposition of two or more exposures to create a single image
by a Dirac delta measure (flash) and a constant finite rectangular window, in combination. For example, a sensitivity window comprising a Dirac comb combined
Multiple_exposure
Computational quantum mechanical modelling method to investigate electronic structure
principle. An exchange-energy functional was added by Paul Dirac in 1928. However, the Thomas–Fermi–Dirac theory remained rather inaccurate for most applications
Density_functional_theory
Computational chemistry software package
Parrinello in 1985 while working at SISSA, who were subsequently awarded the Dirac Medal by ICTP in 2009. In contrast to Born–Oppenheimer molecular dynamics
Car–Parrinello molecular dynamics
Car–Parrinello_molecular_dynamics
Video editing software
SVCD, DVD, x264/Blu-ray, ogg/mp4 ogm, Matroska mkv, dv, swf, Ogg Theora, Dirac, MNG, Snow, xvid, Flash and even animated GIF and PDF) Resampling of video
LiVES
2008 open and royalty-free video coding format
H.264. Compression-wise, VP8 offers better performance than Theora and Dirac. According to Glaser, the VP8 interface lacks features and is buggy, and
VP8
Video coding format developed by Microsoft
on 2028-08-24. AV1 Comparison of H.264 and VC-1 Video compression VC-2 (Dirac) Windows Media 9 Video Codec; SMPTE VC-1 (Full draft). Sustainability of
VC-1
List of Windows 11 operating system versions
working at all; e.g., Asphalt 8 (resolved since March 19, 2025), Dirac audio improvement software (if cridspapo.dll is utilized), and AutoCAD 2022. New features
Windows_11_version_history
Backend in computing
ACM/IEEE Supercomputing 2000: High Performance Networking and Computing. DIRAC: a scalable lightweight architecture for high throughput computing Grid
Cluster_manager
Estimate object properties from a finite number of projections
) {\displaystyle \mu (x,y)} and δ ( ) {\displaystyle \delta ()} is the Dirac delta function. This function is known as the Radon transform (or sinogram)
Tomographic_reconstruction
Sufficiency theorem for reconstructing signals from samples
mathematically equivalent method uses the Dirac comb and proceeds by convolving one sinc function with a series of Dirac delta pulses, weighted by the sample
Nyquist–Shannon sampling theorem
Nyquist–Shannon_sampling_theorem
Topics referred to by the same term
asteroid Schrödinger, an implementation of Dirac (video compression format) Schrödinger (company), a scientific software company Schrödinger (Hellsing), a fictional
Schrödinger_(disambiguation)
the audio & video codecs are integrated into Nero's Recode DVD ripping software. Nero certifies certain DVD player/recorder devices as Nero Digital compatible
Nero_Digital
Branch of chemistry
although some progress has been made in solving the fully relativistic Dirac equation. In principle, it is possible to solve the Schrödinger equation
Computational_chemistry
Fundamental physical law of electromagnetism
}{|\mathbf {r} |^{3}}}\right)=4\pi \delta (\mathbf {r} )} where δ(r) is the Dirac delta function, the result is ∇ ⋅ E ( r ) = 1 ε 0 ∫ ρ ( s ) δ ( r − s )
Coulomb's_law
Widely used standard for video compression
Microsoft and approved as a SMPTE standard in 2006 Comparison of H.264 and VC-1 Dirac (video compression format), a video coding design by BBC Research & Development
Advanced_Video_Coding
Chinese smartphone
Realme. Realme has developed the Dirac Power Sound small speaker sound quality optimization technology jointly with Dirac Research AB to enhance the audio
Realme_5
File format for storing digital video data
extension to derive which codec or program to use to play the files. The free software FFmpeg project's libraries have very wide support for encoding and decoding
Video_file_format
Type of approximation to an underlying physical theory
Regularization Renormalization Vacuum state Wick's theorem Wightman axioms Equations Dirac equation Klein–Gordon equation Proca equations Wheeler–DeWitt equation Bargmann–Wigner
Effective_field_theory
Audio codec
Nero AAC Codec is a set of software tools for encoding and decoding Advanced Audio Coding (AAC) format audio, and editing MPEG-4 metadata. It was developed
Nero_AAC_Codec
Chemical species structure notation
Arthur Weininger (Pomona; Daylight CIS) and Jeremy Scofield (Cedar River Software, Renton, WA) for assistance in programming the system." The Environmental
Simplified Molecular Input Line Entry System
Simplified_Molecular_Input_Line_Entry_System
place. "Schrödinger" – A Dirac codec implementation developed by David Schleef. Schrödinger (company), a scientific software company Schrödinger (Hellsing)
List of things named after Erwin Schrödinger
List_of_things_named_after_Erwin_Schrödinger
Form of entertainment in mathematics
Conway, Roger Penrose, Ian Stewart, Timothy Gowers, Stephen Hawking and Paul Dirac. The Journal of Recreational Mathematics was the largest publication on
Recreational_mathematics
American physicist and science educator
mathematician Marcel Riesz inspired Hestenes to study a geometric interpretation of Dirac matrices. He obtained his Ph.D. from UCLA with a thesis entitled Geometric
David_Hestenes
San Francisco-based venture capital firm
company to build that would have a material, positive impact on the world." Dirac: defense manufacturing AI startup that helps to build jet engines and submarines
Founders_Fund
Origin and evolution of the symbols used to write equations and formulas
formulated by Dirac to explain the behavior of the relativistically moving electron. The Dirac equation in the form originally proposed by Dirac is: ( β m
History of mathematical notation
History_of_mathematical_notation
compression format. WavPack – "Hybrid" (lossless/lossy) audio codec AV1 Dirac – a video compression format supporting both lossless and lossy compression
List_of_open_file_formats
Theory of subatomic structure
bound Exceptional Lie groups (G2, F4, E6, E7, E8) ADE classification Dirac string p-form electrodynamics Geometry Worldsheet Kaluza–Klein theory Compactification
String_theory
Method in computational fluid dynamics
\delta {\big (}x-X(s,t){\big )}\,ds,} where δ {\displaystyle \delta } is the Dirac δ function. The forcing can be extended to multiple dimensions to model
Immersed_boundary_method
Approximation method in quantum physics
determinant, a determinant of one-particle orbitals first used by Heisenberg and Dirac in 1926, trivially satisfies the antisymmetric property of the exact solution
Hartree–Fock_method
Company based in Cranbury, New Jersey
in Mills' work, are incompatible with the Schrödinger, Klein–Gordon and Dirac equations, key equations in the study of quantum systems. In 2008, the Journal
Brilliant_Light_Power
Russian university
of phase transitions Alexander Polyakov – quantum field theory classics, Dirac'86 and Lorentz'94 Medals Emmanuel Rashba – Soviet-American theoretical physicist
Moscow Institute of Physics and Technology
Moscow_Institute_of_Physics_and_Technology
Quantum chemistry algorithm
both the Lagrangian and the McLanchlan Variational Principle turn into the Dirac-Frenkel Variational Principle: ⟨ δ Ψ | i ∂ ∂ t − H | Ψ ⟩ = 0 {\displaystyle
Multi-configuration time-dependent Hartree
Multi-configuration_time-dependent_Hartree
New Zealand chemist (born 1962)
Association of Theoretical and Computational Chemists (WATOC) and received the Dirac Medal in 1999 and the Schrödinger Medal in 2011 from WATOC. In 2013, Gill
Peter_Gill_(chemist)
Multivalued function in mathematics
involving exponentials (e.g. the maxima of the Planck, Bose–Einstein, and Fermi–Dirac distributions) and also occurs in the solution of delay differential equations
Lambert_W_function
Distribution of variables which satisfies a stability property under linear combinations
upper bound corresponding to the normal distribution, and approaches the Dirac delta function in the limit as α → 0 {\displaystyle \alpha \rightarrow 0}
Stable_distribution
Numerical method for solving physical or engineering problems
reference coordinate system. The process is often carried out using FEM software with coordinate data generated from the subdomains. The practical application
Finite_element_method
British astrophysicist (1882–1944)
discoverers of quantum mechanics, Paul Dirac, also pursued this line of investigation, which has become known as the Dirac large numbers hypothesis. A somewhat
Arthur_Eddington
Scientific theory
exchange energy in orbital-free density functional theory (OFDFT) is the Dirac exchange as a Local Density Approximation (LDA) (1930) It is related to
Orbital-free density functional theory
Orbital-free_density_functional_theory
Reconstruction of a filtered signal
designing and applying a Wiener filter that shapes the estimated wavelet to a Dirac delta function (i.e., a spike). The result may be seen as a series of scaled
Deconvolution
The Molecular Modelling Toolkit (MMTK) is an open-source software package written in Python, which performs common tasks in molecular modelling. The Molecular
Molecular_Modelling_Toolkit
Four-dimensional number system
{\displaystyle \mathbb {H} ^{\otimes 2}\otimes _{\mathbb {R} }\mathbb {C} } (Dirac algebra). A quaternion is an expression of the form a + b i + c j + d k
Quaternion
Probability distribution
normal distribution to the case with zero variance can be defined using the Dirac delta measure δ μ {\textstyle \delta _{\mu }} , although the resulting random
Normal_distribution
Algebra based on a vector space with a quadratic form
define the Dirac equation and introduce the Dirac operator. The entire Clifford algebra shows up in quantum field theory in the form of Dirac field bilinears
Clifford_algebra
Measurement of a signal at discrete time intervals
(T)} , the sequence of delta functions is called a Dirac comb. Mathematically, the modulated Dirac comb is equivalent to the product of the comb function
Sampling_(signal_processing)
Application of mathematical methods to other fields
past holders include Isaac Newton, Charles Babbage, James Lighthill, Paul Dirac, and Stephen Hawking. Schools with separate applied mathematics departments
Applied_mathematics
Interplay between observation, experiment, and theory in science
Poincaré (1902), Ernst Cassirer (1920), Max Born (1949 and 1953), Paul Dirac (1958), Olivier Costa de Beauregard (1966), Eugene Wigner (1967), Lawrence
Scientific_method
Hungarian and American mathematician and physicist (1903–1957)
establish a rigorous mathematical framework for quantum mechanics, known as the Dirac–von Neumann axioms, in his influential 1932 work Mathematical Foundations
John_von_Neumann
3 dimensions of graphs of functions arbitrary points, lines and curves Dirac matrix calculations of interest in high energy physics quantifier elimination
Reduce (computer algebra system)
Reduce_(computer_algebra_system)
Branch of physics
Fermi–Dirac statistics. Using this idea, he developed the theory of paramagnetism in 1926. Shortly after, Sommerfeld incorporated the Fermi–Dirac statistics
Condensed_matter_physics
English theoretical physicist (1942–2018)
degrees, the Gold Medal of the Royal Astronomical Society (1985), the Paul Dirac Medal (1987) and, jointly with Penrose, the prestigious Wolf Prize (1988)
Stephen_Hawking
Random process independent of past history
P_{0}(x,\cdot )=\delta _{x}} , where δ x {\displaystyle \delta _{x}} is the Dirac-measure in x {\displaystyle x} , and X : Ω × [ 0 , ∞ ) → S {\displaystyle
Markov_chain
sets and relativistic methods (zeroth order regular approximation to the Dirac equation (ZORA), X2C: scalar relativistic and spin-orbit coupling) for all
Amsterdam_Density_Functional
Smartphone by OnePlus
custom ROM installs, and as a result the phone has received unofficial software support. degoogled ROMs can bring the phone up to Android 15 and include
OnePlus_5
DIRAC SOFTWARE
DIRAC SOFTWARE
Boy/Male
Indian
Old Arabic name
Girl/Female
Tamil
Beautiful, Splendor, Derived from Indira - Goddess laxmis name
Boy/Male
Indian
Scholar
Boy/Male
Muslim
Old Arabic name
Girl/Female
Indian
Beautiful, Splendor, Derived from Indira - Goddess laxmis name
Boy/Male
Muslim
Scholar
DIRAC SOFTWARE
DIRAC SOFTWARE
Surname or Lastname
English (Devon)
English (Devon) : apparently a habitational name possibly from Glidden in Hampshire, which is named from Old English gleoda ‘kite’ + dūn ‘hill’. Compare Gledhill. However, the concentration of the surname in Devon suggests that it may also have arisen from another place, now lost.
Surname or Lastname
English
English : variant of Grove 1.
Male
English
Anglicized form of Hebrew Benayah and Benayahu, BENAIAH means "God has built."Â In the bible, this is the name of the captain of David's guard and many other characters.
Boy/Male
Tamil
Sidharath | ஸிதà¯à®¤à®¾à®°à¯à®¤
Boy/Male
Russian
Gift from God.
Boy/Male
Indian
Men with all blessings of Allah
Girl/Female
Indian, Modern
Shower of Happiness
Girl/Female
Indian, Telugu
One Desire
Female
English
English variant spelling of French Corinne, CORRINE means "maiden."
Girl/Female
Arabic, Muslim
Intellect; Perception; Achievement; Attainment
DIRAC SOFTWARE
DIRAC SOFTWARE
DIRAC SOFTWARE
DIRAC SOFTWARE
DIRAC SOFTWARE
n.
A small branching shrub (Dirca palustris), with a white, soft wood, and a tough, leathery bark, common in damp woods in the Northern United States; -- called also moosewood, and wicopy.