Psi
Encyclopedia
Alphabetic letters
- Psi (Greek)Psi (letter)Psi is the 23rd letter of the Greek alphabet and has a numeric value of 700. In both Classical and Modern Greek, the letter indicates the combination /ps/ . The letter was adopted into the Old Italic alphabet, and its shape is continued into the Algiz rune of the Elder Futhark...
(Ψ, ψ) 23rd letter of the Greek alphabet - Psi (Cyrillic)Psi (Cyrillic)Psi is a letter in the early Cyrillic alphabet, derived from the Greek letter psi . It represents the sound /ps/, as in English naps...
(Ѱ, ѱ), a letter of the early Cyrillic alphabet, adopted from Greek
Mathematics
- Tangential angleTangential angleIn geometry, the tangential angle of a curve in the Cartesian plane, at a specific point, is the angle between the tangent line to the curve at the given point and the x-axis. In geometry, the tangential angle of a curve in the Cartesian plane, at a specific point, is the angle between the tangent...
of a curve - Chebyshev functionChebyshev function[Image:ChebyshevPsi.png|thumb|right|The Chebyshev function ψ, with x [Image:ChebyshevPsi.png|thumb|right|The Chebyshev function ψ, with x ...
- Dedekind psi function
- Digamma function
- Polygamma functions
- Stream functionStream functionThe stream function is defined for two-dimensional flows of various kinds. The stream function can be used to plot streamlines, which represent the trajectories of particles in a steady flow. Streamlines are perpendicular to equipotential lines...
, in two-dimensional flows
Mind related
- PsychologyPsychologyPsychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...
or psychologist, denoted Ψ, used in the logo of various psychological associations - Psi ChiPsi ChiPsi Chi is the International Honor Society in Psychology, founded in 1929 for the purposes of encouraging, stimulating, and maintaining excellence in scholarship, and advancing the science of psychology. With over 1,050 chapters, Psi Chi is one of the largest honor societies in the United States...
, the National Honor Society in Psychology - Psi-TheoryPsi-TheoryPsi-Theory, developed by Dietrich Dörner, is about human action regulation, intention and behaviour. The theory describes a comprehensive model of the human brain, its cognitive processes, emotion and motivation. It is about the informational structure of an intelligent, motivated, emotional agent ...
, a theory about the human mind, a cognitive architecture
- Psi (parapsychology)Psi (parapsychology)Psi is a term from parapsychology derived from the Greek, ψ psi, 23rd letter of the Greek alphabet; from the Greek ψυχή psyche, "mind, soul".-Etymology:...
, psychic or paranormal phenomena - Psi hitPsi hitPsi hit and psi miss are terms used in discussion of parapsychological experimentation to describe the success or failure of the subject in achieving the desired result more often than could be expected through chance alone...
, a parapsychological experimentation term - Paranormal Site InvestigatorsParanormal Site InvestigatorsUnited Kingdom charity Paranormal Site Investigators is dedicated to advancing education, research and heritage in the area of anomalous experience. The charity has a membership of around 1400...
, an education and research charity in the UK
Natural science and technology
- PSI (computational chemistry)PSI (computational chemistry)PSI is an ab initio computational chemistry package originally written by the research group of Henry F. Schaefer, III . It performs high-accuracy quantum computations on small to medium-sized molecules....
, software - PSI (prion), an infectious protein in yeast
- Psi (instant messaging client)Psi (instant messaging client)Psi is a GPL instant messaging client for the XMPP protocol which uses the Qt toolkit. It runs on Linux, Windows, Mac OS X and eComStation.Ready-to-install deb and RPM packages are available for many Linux distributions...
, a popular XMPP client program - Pandemic Severity IndexPandemic Severity IndexThe Pandemic Severity Index is a proposed classification scale for reporting the severity of influenza pandemics in the United States. The PSI was accompanied by a set of guidelines intended to help communicate appropriate actions for communities to follow in potential pandemic situations...
, by the US Centers for Disease Control and Prevention - Pounds per square inchPounds per square inchThe pound per square inch or, more accurately, pound-force per square inch is a unit of pressure or of stress based on avoirdupois units...
, a unit of pressure - Photosystem IPhotosystem IPhotosystem I is the second photosystem in the photosynthetic light reactions of algae, plants, and some bacteria. Photosystem I is so named because it was discovered before photosystem II. Aspects of PS I were discovered in the 1950s, but the significances of these discoveries was not yet known...
, a protein complex involved in photosynthesis - Pneumonia severity indexPneumonia severity indexThe pneumonia severity index [PSI] or PORT Score is a clinical prediction rule that medical practitioners can use to calculate the probability of morbidity and mortality among patients with community acquired pneumonia....
- Pollutant Standards IndexPollutant Standards IndexThe Pollutant Standards Index, or PSI, provides a uniform system of measuring pollution levels for the major air pollutants. It is based on a scale devised by the United States Environmental Protection Agency to provide a way for broadcasts and newspapers to report air quality on a daily basis.The...
, an air pollution measure - Porous siliconPorous siliconPorous silicon is a form of the chemical element silicon which has introduced nanoporous holes in its microstructure, rendering a large surface to volume ratio in the order of 500 m2/cm3.-History:...
, a material - Program Specific InformationProgram Specific InformationProgram-specific information is metadata about a program and part of a MPEG transport stream.The PSI data contains five tables:* PAT * CAT * PMT...
, part of the MPEG transport stream protocol - Protocol for Stage Illumination, a communications protocol geared towards stage lighting and effects control
- Protein Structure InitiativeProtein Structure InitiativeThe Protein Structure Initiative is an ongoing effort begun in 2000 to accelerate discovery in structural genomics and contribute to understanding biological function. Funded by the U.S...
, a structural genomics initiative of the U.S. NIGMS - J/ψ meson, a subatomic particle
- Water potentialWater potentialWater potential is the potential energy of water per unit volume relative to pure water in reference conditions. Water potential quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure, or matrix effects such as surface tension...
, denoted Ψ, in physical chemistry, the potential energy of a water solution relative to pure water - Wave function, denoted ψ, in quantum mechanics
- 'Yaw' angle, denoted ψ in aerospace engineering, the rotation angle of a vehicle around the vertical axis with the Tait-Bryan convention
Organizations
- Paul Scherrer InstitutePaul Scherrer InstituteThe Paul Scherrer Institute is a multi-disciplinary research institute which belongs to the Swiss ETH-Komplex covering also the ETH Zurich and EPFL...
in Villigen, Switzerland - Poetry Slam, Inc.Poetry Slam, Inc.Poetry Slam, Inc. is the official 501 non-profit organization charged with overseeing the international coalition of poetry slams...
- Policy Studies InstitutePolicy Studies InstituteThe Policy Studies Institute is a British think-tank. It was formed in 1978 through the merger of the former Centre for the Study of Social Policy and Political and Economic Planning. Since 1998 it has been an independent subsidiary of the University of Westminster...
, a UK organization affiliated with the University of Westminster which undertakes research in matters pertaining to work and social policy and the environment - Population Services InternationalPopulation Services InternationalPopulation Services International is a global health organization with programs targeting malaria, child survival, HIV and reproductive health...
, an international healthcare NGO based in Washington DC - Professional Secretaries International
- Professors for a Strong IsraelProfessors for a Strong IsraelProfessors for a Strong Israel is a right-wing group of academics in Israel. They describe themselves as a "non-partisan organization of academics united by a shared concern for the security and the Jewish character of the State of Israel." It was founded in 1988 but stepped up its activities...
, a right-wing group of academics in Israel - Psychiatric Solutions, Inc., a corporation that owns psychiatric hospitals
- Public Services InternationalPublic Services InternationalPublic Services International is a global union federation of public sector trade unions. It 620 affiliated unions, in 160 countries, representing 20 million workers...
, a global union federation of public sector trade unions - Statisticians in the Pharmaceutical IndustryStatisticians in the Pharmaceutical IndustryStatisticians in the Pharmaceutical Industry, abbreviated to PSI, is an organisation for the promotion of statistical thinking in order to improve the quality of research and development in the pharmaceutical industry....
Entertainment
- Psi (comics)Psi (comics)Psi is a DC character created by Paul Kupperberg and Carmine Infantino for Daring New Adventures of Supergirl #1 .-Fictional character biography:...
, a character in DC Comics - Psi ComPsi ComPsi Com was an American gothic rock band of the early 1980s. Prominent in the underground Los Angeles music scene, the group is noted for being the first band of the acclaimed vocalist Perry Farrell who went on to achieve greater fame in the band Jane's Addiction, as well as the bands Porno for...
, a 1980s rock band - Psi CorpsPsi CorpsIn the fictional universe of Babylon 5, the Psi Corps is an agency of the Earth Alliance responsible for all humans with telepathic or other para-psychological abilities anywhere within Earth controlled space. All persons with Psi abilities are required to either join the Corps, face lifetime...
, in the Babylon 5 fictional universe, the ruling body of Earth's telepaths - Psi DivisionPsi DivisionPsi-Division is a fictional organisation in the Judge Dredd and Anderson: Psi-Division comic strips in 2000 AD and Judge Dredd: The Megazine. It is the branch of Mega-City One's Justice Department that deals in supernatural phenomena, using Judges with psychic abilities. Psi-Judges are often...
, a division in the Judge Dredd and 2000 AD series of comics - Psi Factor: Chronicles of the ParanormalPsi Factor: Chronicles of the ParanormalPsi Factor: Chronicles of the Paranormal is a Canadian science fiction drama television series which was filmed in and around Toronto, Ontario, Canada, and aired 88 episodes over four seasons from 1996 to 2000...
, a Canadian television series - Psi-ForcePsi-ForcePsi-Force was a thirty-two-issue comic book series published by Marvel Comics under their New Universe imprint from 1986 to 1989. Along with D.P...
, a comic series - Psi-HawkPsi-HawkPsi-Hawk is a fictional creation from the Marvel New Universe line. He first appeared in Psi-Force #1 .-Fictional character background:...
, a comic character - Psi LordsPsi LordsThe PSI-Lords are a fictional team of superbeings from the Valiant Comics universe. The characters first appearing in Rai and the Future Force #21 after a cameo in Magnus #36 and was featured in a short-lived, eponymous series of ten issues between 1994 and 1995...
, a comic series - Psi-Ops: The Mindgate ConspiracyPsi-Ops: The Mindgate ConspiracyPsi-Ops: The Mindgate Conspiracy is a video game developed by Midway Games for the Xbox, PlayStation 2 and Microsoft Windows PC platforms. It was also being developed for the Nintendo GameCube titled ESPionage but later cancelled. The game was released in North America on June 14, 2004; the...
, a video game in which characters use psychic powers - Psi PowerPsi PowerPsi Power is a 1978 song by the UK rock group Hawkwind. It was originally released as a single in the UK on 6 October 1978, being a slightly different version to the one on the album Hawklords....
, a 1978 song by the UK rock group Hawkwind - PSI, the psychic power used by some characters in the EarthBoundEarthBoundEarthBound, also known as EarthBound: The War Against Giygas! and released as in Japan, is a role-playing video game co-developed by Ape and HAL Laboratory and published by Nintendo for the Super Nintendo Entertainment System video game console...
series - PSI (album)PSI (album)-Personnel:Pitchshifter* J.S. Clayden - lead vocals and programming* Jim Davies - lead and rhythm guitar* Mark Clayden - bass* Jason Bowld - drums and percussionAdditional musicians* Johnny Mingus - live double bass on 'Stop Talking '...
, an album by Pitchshifter - PSI RecordsPSI RecordsPSI Records is an independent record label based in Nottingham, United Kingdom and Los Angeles, United States formed in 2002 by Pitchshifter frontman JS Clayden and his brother Mark Clayden.-History:...
, a music record label
Politics and government
- Partai Sosialis Indonesia ("Indonesian Socialist Party")
- Italian Socialist PartyItalian Socialist PartyThe Italian Socialist Party was a socialist and later social-democratic political party in Italy founded in Genoa in 1892.Once the dominant leftist party in Italy, it was eclipsed in status by the Italian Communist Party following World War II...
(Partito Socialista Italiano) - Italian Socialist Party (2007)
- United States Senate Homeland Security Permanent Subcommittee on Investigations, a sub-committee of the U.S. Senate
- Proliferation Security InitiativeProliferation Security InitiativeThe Proliferation Security Initiative is a global effort that aims to stop trafficking of weapons of mass destruction , their delivery systems, and related materials to and from states and non-state actors of proliferation concern. Launched by United States President George W...
, an international effort to interdict transfer of banned weapons and weapons technology - Public Sector Information, as in
- The European Union Directive on the re-use of public sector informationDirective on the re-use of public sector informationDirective 2003/98/EC on the re-use of public sector information, otherwise known as the PSI Directive is a EU directive that encourages EU member states to make as much public sector information available for re-use as possible. Previous to the creation of this directive this area was left to...
(PSI directive), adopted in November 2003 - The United Kingdom's Office of Public Sector InformationOffice of Public Sector InformationThe Office of Public Sector Information is the body responsible for the operation of Her Majesty's Stationery Office and of other public information services of the United Kingdom...
(OPSI), formerly Her Majesty's Stationary Office (HMSO)
- The European Union Directive on the re-use of public sector information
- Private Sector Involvement
Miscellaneous
- Pechersk School InternationalPechersk School InternationalPechersk School International provides education for children from the ages of two and a half to eighteen years in Kiev, Ukraine.-History:...
, in Kiev, Ukraine - Permanent Staff InstructorPermanent Staff InstructorA permanent staff instructor is a warrant officer class 2 , or senior non-commissioned officer , of the Regular British Army who has been selected to instruct Territorial Army soldiers...
, in the British Army - PSI-20PSI-20The PSI-20 is a benchmark stock market index of companies that trade on Euronext Lisbon, the main stock exchange of Portugal. The index tracks the prices of the twenty listings with the largest market capitalisation and share turnover in the PSI Geral, the general stock market of the Lisbon exchange...
, a stock market index of companies that trade on Euronext Lisbon, the main stock exchange of Portugal - Presentence investigationPresentence InvestigationA presentence investigation report is a legal term referring to the investigation into the history of person convicted of a crime before sentencing to determine if there are extenuating circumstances which should ameliorate the sentence or a history of criminal behavior to increase the harshness...
, in law, an investigation into the history of person convicted of a crime, before sentencing - Pre-shipment inspectionPre-shipment inspectionPre-shipment inspection, also called preshipment inspection or PSI, is an important and reliable quality control method for checking goods' quality while clients buy from the suppliers....
, a method of quality control - Professional Skills InstituteProfessional Skills InstituteProfessional Skills Institute is a nationally accredited private university in Toledo, Ohio. PSI specializes in training for allied health professions, and has students of seeking Associate Degrees as physical therapist assistants and medical assistants and other diplomas as medical secretaries...
, a private university in Toledo, Ohio - Pitch Shifter Industries, an acronym used by the British band PitchshifterPitchshifter (band)Pitchshifter are a British five-piece electronic-metal band from Nottingham, United Kingdom formed in 1989. The band was started by bassist and vocalist Mark Clayden, lead guitarist and programmer Johnny A...