
	Where results make sense

Topic: Dirac

Related Topics

Tarkin

Wavelet compression

Data compression

SPIHT

Charles Holker Carroll

Murdock, Nebraska

Colwell, Iowa

Newburgh Heights, Ohio

Certified Financial Planner

Phlebotomy

SIGCOMM

Decline and Fall

Ivanhoe

Moluccan Cockatoo

Hoshea

In the News (Sat 5 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Paul Dirac Summary
		Dirac shared the Nobel Prize for Physics with Erwin Schrödinger in 1933 for his "discovery of new fertile forms of the theory of atoms and for its applications." Few of Dirac's theories were simple to grasp, and for that reason he had few students during his career.
		Dirac was born in Bristol, England on August 8, 1902 to Charles Adrien Ladislas Dirac, a Swiss immigrant, and Florence Hannah (Holten) Dirac, a native of Britain.
		Dirac was the Lucasian Professor of Mathematics at Cambridge from 1932 to 1969.
	www.bookrags.com /Paul_Dirac (5890 words)

	Paul Dirac - Wikipedia, the free encyclopedia
		Paul Adrien Maurice Dirac, OM (August 8, 1902 – October 20, 1984) was a British theoretical physicist and a founder of the field of quantum physics.
		The positron was subsequently observed by Carl Anderson in 1932.
		Dirac was Lucasian professor of mathematics at Cambridge from 1932 to 1969.
	en.wikipedia.org /wiki/Paul_Dirac (1035 words)

	Kids.net.au - Encyclopedia Paul Dirac -
		Paul Adrien Maurice Dirac, (August 8, 1902 - October 20, 1984) was a physicist and a founder of the field of quantum physics.
		This allowed Dirac to predict the existence of the positron, the electron's anti-particle; the positron was subsequently observed by Anderson in 1932.
		Dirac was Lucasian professor of mathematics at Cambridge from 1932 to 1969 and an undergraduate at Bristol University.
	www.kids.net.au /encyclopedia-wiki/p./P.A.M._Dirac (222 words)

	Dirac - Wikipedia, the free encyclopedia
		Dirac's implementors make the preliminary claim of "a two-fold reduction in bit rate over MPEG-2 for high definition video"[1], an estimate which would put the design in about the same class of compression capability as the latest standardization efforts of H.264/AVC and VC-1.
		Dirac is one of several projects attempting to apply wavelets to video compression.
		The experimental and unfinished Dirac codec, written in C++, was released under an Open Source licence at SourceForge on 11 March 2004.
	en.wikipedia.org /wiki/Dirac (482 words)

	Dirac, Paul Adrien Maurice. The Columbia Encyclopedia, Sixth Edition. 2001-05
		In 1928, Dirac published a version of quantum mechanics that took into account the theory of relativity (see quantum theory).
		Dirac’s equation for the motion of a particle is a relativistic modification of the Schrödinger wave equation, the basic equation of quantum mechanics.
		Dirac also received the Copley Medal of the Royal Society in 1952 for this and other contributions to the quantum theory, including his formulation (with Enrico Fermi) of the Fermi-Dirac statistics and his work on the quantum theory of electromagnetic radiation.
	www.bartleby.com /65/di/Dirac-Pa.html (219 words)

	Paul Dirac - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-23)
		Paul Adrien Maurice Dirac, (August 8, 1902 – October 20, 1984) was a British theoretical physicist and a founder of the field of quantum physics.
		Paul Dirac shared the Nobel Prize for physics in 1933 with Erwin Schrödinger "for the discovery of new productive forms of atomic theory." Dirac was Lucasian professor of mathematics at Cambridge from 1932 to 1969.
		He called the equation for the time-evolution of a quantum-mechanical operator, which Dirac was in fact the first to write down, the 'Heisenberg equation of motion.' Most physicists speak of Fermi-Dirac statistics for half-integer spin particles and Bose-Einstein statistics for integer spin particles.
	www.hartselle.us /project/wikipedia/index.php/Paul_Dirac (1017 words)

	Paul Dirac (Site not responding. Last check: 2007-10-23)
		In 1937 Dirac married Margit Balasz (née Wigner), the sister of the famous Hungarian physicist Eugene Wigner.
		Dirac continued to publish important papers on the quantum theory of fields and gravity throughout his career, and was elected an Honorary Fellow of the Institute of Physics in 1971.
		In 1995 a plaque to Dirac was unveiled in Westminster Abbey, London.
	www.iop.org /diracbio.html (652 words)

	P. A. M. Dirac (Site not responding. Last check: 2007-10-23)
		Dirac was three years old when Einstein published his famous papers on relativity in 1905 and a year old when his predecessor Joseph Larmor began his tenure as Lucasian professor.
		Dirac was able to produce accurate values for the strength the magnetic field around the electron, as well as other important characteristics that had eluded everyone up to that time.
		Dirac's life was dedicated to physics with no interests outside of his work, but, besides quantum mechanics, he did work on isotope separation, magnetic monopoles, large-number hypothesis and other physics areas.
	security-books.com /lucasianchair.org/dirac.html (2525 words)

	CERN Courier - Paul Dirac: a genius in the - IOP Publishing - article
		With it, he was able to develop his transformation theory, which showed explicitly (see P Dirac 1927 in Further reading) how it was possible to relate a range of different formulations of quantum mechanics, all of them equivalent in their physical consequences, such as Schrödinger's wave equation and Heisenberg's matrix mechanics.
		In 1927 Dirac sought to develop a theory of the electron that satisfied this requirement and he published his relativistically invariant equation for the electron early in 1928 (see P Dirac 1928 in Further reading).
		Dirac's name would be high in physics records even if quantum mechanics and transformation theory were his only contributions to knowledge.
	www.cerncourier.com /main/article/42/7/15 (1851 words)

	Dirac (Site not responding. Last check: 2007-10-23)
		Dirac's implementors make the preliminary claim of "''a two-fold reduction in bit rate over MPEG-2 for high definition video''"http://www.bbc.co.uk/rd/projects/dirac/overview.shtml, an estimate which would put the design in about the same class of compression capability as the latest standardization efforts of H.264/AVC and VC-1.
		The Dirac equation is a relativistic quantum mechanical wave equation invented by Paul Dirac in 1928.
		The Dirac Medal of the ICTP is given each year by the Abdus Salam International Centre for Theoretical Physics(ICTP) in honour of physicist P.A.M. Dirac.
	www.wwwtln.com /finance/62/dirac.html (1031 words)

	SPACE.com -- Wild Posters Celebrate 100th Birthday of Dour Father of Antimatter
		Dirac's lack of popularity might have something to do with the fact that, despite winning the Nobel Prize in 1933, he was a recluse.
		Dirac is most famous for predicting the anti-electron, also known as the positron.
		The positron was detected shortly after Dirac predicted its existence, from the study of cosmic ray particles arriving from space.
	www.space.com /scienceastronomy/dirac_posters_020808.html (579 words)

	Dirac, Paul Adrien Maurice on Encyclopedia.com (Site not responding. Last check: 2007-10-23)
		In 1928, Dirac published a version of quantum mechanics that took into account the theory of relativity (see quantum theory).
		Dirac's equation for the motion of a particle is a relativistic modification of the Schrödinger wave equation, the basic equation of quantum mechanics.
		Dirac also received the Copley Medal of the Royal Society in 1952 for this and other contributions to the quantum theory, including his formulation (with Enrico Fermi) of the Fermi-Dirac statistics and his work on the quantum theory of electromagnetic radiation.
	www.encyclopedia.com /html/D/Dirac-P1a.asp (235 words)

	Featured Physicists - Paul Dirac 1902-1984
		Dirac's first degree, obtained at the Merchant Venturer's Technical College, was in electrical engineering, but he had no real interest in the subject and after graduating spent two years studying mathematics at the University of Bristol.
		In 1928 Dirac took an important step towards bringing quantum physics into conformity with Einstein's special theory of relativity by devising an equation (now called the Dirac equation) that could describe the behaviour of electrons at any speed up to the speed of light.
		During this period Dirac worked on a variety of topics including magnetic monopoles (hypothetical magnetic charges) and the speculation that the fundamental constants of physics might be gradually changing in a co-ordinated way.
	physicalworld.org /restless_universe/html/ru_dira.html (554 words)

	CERN Courier - Paul Dirac: a genius in the - IOP Publishing - article
		With it, he was able to develop his transformation theory, which showed explicitly (see P Dirac 1927 in Further reading) how it was possible to relate a range of different formulations of quantum mechanics, all of them equivalent in their physical consequences, such as Schrödinger's wave equation and Heisenberg's matrix mechanics.
		In 1927 Dirac sought to develop a theory of the electron that satisfied this requirement and he published his relativistically invariant equation for the electron early in 1928 (see P Dirac 1928 in Further reading).
		Dirac's name would be high in physics records even if quantum mechanics and transformation theory were his only contributions to knowledge.
	cerncourier.com /main/article/42/7/15 (1851 words)

	Dirac biography
		Dirac had been hoping to have his research supervised by Ebenezer Cunningham, for by this time Dirac had become fascinated in the general theory of relativity and wanted to undertake research on this topic.
		Dirac was appointed Lucasian professor of mathematics at the University of Cambridge in 1932, a post he held for 37 years.
		Although Dirac made vastly important contributions to physics, it is important to realise that he was always motivated by principles of mathematical beauty.
	www-groups.dcs.st-and.ac.uk /~history/Biographies/Dirac.html (2515 words)

	Paul Dirac: the purest soul in physics (February 1998) - Physics World - PhysicsWeb
		In Dirac's equation, spin did not have to be imported: it emerged - along with the magnetism of the electron - as an inevitable property of an electron that was both a quantum particle and a relativistic one.
		Dirac also showed how quantum waves for many electrons had to be constructed, incorporating the philosophically intriguing fact that any two of these particles are absolutely identical and so cannot be distinguished in any way.
		In a clever stroke of lateral thinking, Dirac realized that the quantum symmetry between waves of light and waves of matter implied that it is also possible for material particles to be scattered by light, a ghostly possibility that could be observed, as he showed in 1933 in a paper with Peter Kapitza.
	physicsweb.org /article/world/11/2/9/1 (3123 words)

	PAM Dirac (Site not responding. Last check: 2007-10-23)
		Dirac first came to Trieste in June 1968 on the occasion of the International Symposium on Contemporary Physics at which he delivered a lecture on the methods of theoretical physics.
		Dirac also attended the Marcel Grossman Meeting held at the Centre on the centennial of the birth of Albert Einstein in 1979.
		Abdus Salam, who proposed the institution of the Dirac Medal, was Dirac's student at Cambridge and it was after having listened to Dirac's lectures that he decided to devote his life to research rather than becoming a civil servant in his country.
	www.ictp.trieste.it /~sci_info/awards/Dirac/PAMDirac.html (320 words)

	Interview with Paul Adrian Maurice Dirac - F. David Peat
		Like Newton before him Dirac has made contributions that are respected by his colleagues not only for their depth of insight and clarity but for the power and economy with which mathematics is brought to bear upon the problems of nature.
		Dirac was able to show that the two theories were equivalent, and in the process provided quantum theory with a sound mathematical footing.
		Dirac is concerned with the occurrence of large numerical constants in physical theories.
	www.fdavidpeat.com /interviews/dirac.htm (2796 words)

	Frequently asked questions
		Dirac is named after the British physicist (of Swiss extraction) Paul Dirac, who was one of the great figures in modern physics.
		Dirac is relatively modular (which is one reason why it's a conventional hybrid codec rather than, say, 3D wavelets) so removing or adding tools was relatively easy.
		Dirac supports more or less any block sizes for motion compensation and this again helps in scaling the algorithms as larger blocks can be used for higher resolution pictures and smaller ones for low resolution pictures.
	dirac.sourceforge.net /faq.html (1508 words)

	The Dirac Equation and the Positron
		Paul Dirac himself suggested that "one should allow oneself to be led in the direction which the mathematics suggests." It takes a great deal of faith to be led by mathematics which produces some seemingly meaningless results, but that faith led Dirac to a correct relativistic electron equation and the prediction of the positron.
		Before Dirac invented his equation in 1928 the energy of a particle was modeled by the Shrodinger equation.
		At the time Dirac came out with his equation no one wanted to, or had the guts to, suggest that there might be a new particle with a positive charge and the mass of an electron.
	www.phy.duke.edu /~kolena/modern/deaton.html (901 words)

	Paul A.M. Dirac - Biography
		Paul Adrien Maurice Dirac was born on 8th August, 1902, at Bristol, England, his father being Swiss and his mother English.
		Dirac's work has been concerned with the mathematical and theoretical aspects of quantum mechanics.
		Dirac has travelled extensively and studied at various foreign universities, including Copenhagen, Göttingen, Leyden,Wisconsin, Michigan, and Princeton (in 1934, as Visiting Professor).
	nobelprize.org /physics/laureates/1933/dirac-bio.html (460 words)

	NSC: Chemistry: Dirac
		Dirac represents a four-component relativistic quantum chemistry program for calculations of molecular energies with SCF, DFT, MP2, CI, or CC wave functions, analytic gradients and response functions at the SCF level, and numerical gradients at the MP2 and CC levels.
		The Dirac quantum chemistry program is available to users at NSC under the condition that published work includes citation of the program (see below) as well as citations to papers describing the implementation in cases when certain features of the code have been used.
		To run Dirac one has to provide it with two input files called xxxx.inp and yyyy.mol where xxxx and yyyy are arbitrary strings.
	www.nsc.liu.se /software/chemistry/dirac/index.html (568 words)

	Dirac Video Codec
		Dirac is a video codec that provides general-purpose video compression and decompression tools comparable with state-of-the-art systems.
		Dirac is available for distribution under the MPL version 1.1 software license.
		Details on the license under which Dirac is distributed can be found in the licences section.
	dirac.sourceforge.net (155 words)

	Paul Adrien Maurice Dirac: Tutte le informazioni su Paul Adrien Maurice Dirac su Encyclopedia.it (Site not responding. Last check: 2007-10-23)
		Paul Adrien Maurice Dirac, (8 Agosto 1902 - 20 Ottobre 1984) fisico teorico, annoverato tra i fondatori della fisica quantistica.
		Nel 1928, partendo dai lavori di Pauli su sistemi non relativistici con spin, in una serie di articoli, derivò l'equazione che prese il suo nome e che descriveva l'elettrone da un punto di vista relativistico; il tutto partendo dall'invarianza relativistica, sviluppando una teoria di grande semplicità.
		Questo permise a Dirac, nel 1930, di predire l'esistenza del positrone, avente la stessa massa e carica dell'elettrone, ma di segno opposto (soluzioni ad energia negativa della sua equazione).
	www.encyclopedia.it /p/pa/paul_adrien_maurice_dirac.html (242 words)

	Bringing the Dirac Coincidences up to date
		In his paper, Dirac noted that, for some unexplained reason, the ratio of the electrostatic to gravitational force between an electron and a proton is roughly equal to the age of the universe divided by an elementary time constant, implying that
		The upshot, then, is that by combining Dirac’s empirical coincidences with standard inflation theory, one seems to arrive at a way of estimating vacuum energy densities that for the first time gives values consistent with observational constraints at all the critical cosmological epochs.
		O By linking Dirac’s coincidences to concepts drawn from inflation theory, we are led to the possibility that the most recent vacuum phase transition, due to quark-hadron confinement, led to a remnant vacuum energy making an appreciable contribution to the total mass-energy of the current universe.
	ourworld.compuserve.com /homepages/rajm/agdirac.htm (2042 words)

	BBC NEWS \| In Depth \| Newsmakers \| Paul Dirac: The unsung genius
		The resulting Dirac equation, still widely used today, was able to explain the mysterious magnetic and "spin" properties of the electron.
		For his achievement, Paul Dirac was awarded the Nobel Prize for Physics in 1933 at the age of 31.
		Charles Dirac was famously strict and would only allow his son to speak in perfect French at the dining table.
	news.bbc.co.uk /2/low/in_depth/uk/2000/newsmakers/2094374.stm (711 words)

	Paul Dirac
		Dirac was so unusual in the logic and precision of his interaction with the world, both in and out of physics, that legions of "Dirac stories" have become attached to him and have acquired a life of their own.
		At another time, Dirac was at a meeting in a castle, when another guest remarked that a certain room was haunted: at midnight, a ghost is said to appeared.
		Dirac married "Wigner's sister", so known among the physicists because she was the sister of the noted Hungarian theoretical physicist Eugene Wigner.
	www.dirac.ch /PaulDirac.html (1177 words)

	Dirac Release DIRAC04 Site Licence Agreement
		Dirac is an experimental code for the calculation of relativistic molecular properties.
		In the following all references to Dirac refer to all parts of Dirac Release DIRAC04, that is, all files in the distribution as well as generated object files and executables.
		The Dirac source code may not, in whole or in part, be included in any program code you distribute to other users, whether they have a Dirac licence or not, without the specific written consent of the Dirac authors or their representatives.
	dirac.chem.sdu.dk /obtain/Dirac-site_license.shtml (751 words)

Try your search on: Qwika (all wikis)