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Matrices
Matrix (: matrices or matrixes) or MATRIX may refer to: Science and mathematics * Matrix (mathematics), a rectangular array of numbers, symbols or expressions * Matrix (logic), part of a formula in prenex normal form * Matrix (biology), the material in between a eukaryotic organism's cells * Matrix (chemical analysis), the non-analyte components of a sample * Matrix (geology), the fine-grained material in which larger objects are embedded * Matrix (composite), the constituent of a composite material * Hair matrix, produces hair * Nail matrix, part of the nail in anatomy Technology * Matrix (mass spectrometry), a compound that promotes the formation of ions * Matrix (numismatics), a tool used in coin manufacturing * Matrix (printing), a mould for casting letters * Matrix (protocol), an open standard for real-time communication * Matrix (record production), or master, a disc used in the production of phonograph records ** Matrix number, of a gramophone record * Diod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix (mathematics)
In mathematics, a matrix (: matrices) is a rectangle, rectangular array or table of numbers, symbol (formal), symbols, or expression (mathematics), expressions, with elements or entries arranged in rows and columns, which is used to represent a mathematical object or property of such an object. For example, \begin1 & 9 & -13 \\20 & 5 & -6 \end is a matrix with two rows and three columns. This is often referred to as a "two-by-three matrix", a " matrix", or a matrix of dimension . Matrices are commonly used in linear algebra, where they represent linear maps. In geometry, matrices are widely used for specifying and representing geometric transformations (for example rotation (mathematics), rotations) and coordinate changes. In numerical analysis, many computational problems are solved by reducing them to a matrix computation, and this often involves computing with matrices of huge dimensions. Matrices are used in most areas of mathematics and scientific fields, either directly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix (printing)
In the manufacture of metal type used in letterpress printing, a matrix (from the Latin meaning ''womb'' or ''a female breeding animal'') is the mould used to cast a letter, known as a sort (typesetting), sort. Matrices for printing types were made of copper. However, in printmaking the matrix is whatever is used, with ink, to hold the image that makes up the print, whether a plate in etching and engraving or a woodblock in woodcut. Description In letterpress or "cold metal" typesetting, used from the beginning of printing to the late nineteenth century, the matrix of one letter is inserted into the bottom of an adjustable-width hand mould, the mould is locked and molten type metal is poured into a straight-sided vertical cavity above the matrix. When the metal has cooled and solidified the mould is unlocked and the newly cast metal sort is removed. The matrix can then be reused to produce more copies of the sort.Meggs, Philip B. ''A History of Graphic Design.'' John Wiley & Sons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix (composite)
In materials science, a matrix is a constituent of a composite material. Functions A matrix serves the following functions: * It binds the fiber reinforcement. * It provides the composite component its shape and directs its surface quality. Organic Matrices Traditional materials such as glues, muds have traditionally been used as matrices for adobe and papier-mâché. The common matrices are polymers (mainly utilized for fibre reinforced plastics). The most common polymer-based composite materials which include carbon fibre, fibreglass and Kevlar, typically involve two parts at least, the resin and the substrate. Asphalt concrete, which is often used in the construction of roads, has a matrix called bitumen. Mud (wattle and daub) has observed considerable use. Epoxy is utilized as a structural glue or structural matrix material in the aerospace industry. Epoxy resin is, when cured, nearly transparent. Polyester resin is fit for most backyard projects. It tends to h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix (biology)
In biology, matrix (: matrices) is the material (or tissue) in between a eukaryotic organism's cells. The structure of connective tissues is an extracellular matrix. Fingernails and toenails grow from matrices. It is found in various connective tissues. It serves as a jelly-like structure instead of cytoplasm in connective tissue. Tissue matrices Extracellular matrix (ECM) The main ingredients of the extracellular matrix are glycoproteins secreted by the cells. The most abundant glycoprotein in the ECM of most animal cells is collagen, which forms strong fibers outside the cells. In fact, collagen accounts for about 40% of the total protein in the human body. The collagen fibers are embedded in a network woven from proteoglycans. A proteoglycan molecule consists of a small core protein with many carbohydrate chains covalently attached, so that it may be up to 95% carbohydrate. Large proteoglycan complexes can form when hundreds of proteoglycans become noncovalently attached ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix (Doctor Who)
The Time Lords are a fictional ancient race of extraterrestrial life, extraterrestrial people in the British science fiction television series ''Doctor Who''. Time Lords are so named for their command of time travel technology and their Nonlinear narrative, non-linear perception of time. Originally, they were described as a powerful and wise race from the planet Gallifrey, from which the Doctor was a renegade; details beyond this were very limited for the first decade of the series. They later became integral to many episodes and stories as their role in the universe developed. For the first eight years after the History of Doctor Who#2000s, series resumed in 2005, the Time Lords were said to have been destroyed during the Time War (Doctor Who), Last Great Time War at some point in the show's continuity between the television movie in 1996 and the show's revival. In 2013, the 50th anniversary special "The Day of the Doctor" concerned this supposed destruction and their eventu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ReBoot
In computing, rebooting is the process by which a running computer system is restarted, either intentionally or unintentionally. Reboots can be either a cold reboot (alternatively known as a hard reboot) in which the power to the system is physically turned off and back on again (causing an initial boot of the machine); or a warm reboot (or soft reboot) in which the system restarts while still powered up. The term restart (as a system command) is used to refer to a reboot when the operating system closes all programs and finalizes all pending input and output operations before initiating a soft reboot. Terminology Etymology Early electronic computers (like the IBM 1401) had no operating system and little internal memory. The input was often a stack of punch cards or via a switch register. On systems with cards, the computer was initiated by pressing a start button that performed a single command - "read a card". This first card then instructed the machine to read more card ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix (Neuromancer)
''Neuromancer'' is a 1984 science fiction novel by American-Canadian author William Gibson. Set in a near-future dystopia, the narrative follows Case, a computer hacker enlisted into a crew by a powerful artificial intelligence and a traumatised former soldier to complete a high-stakes heist. It was Gibson's debut novel and, following its success, served as the first entry in the Sprawl trilogy, followed by ''Count Zero'' (1986) and ''Mona Lisa Overdrive'' (1988). Gibson had primarily written countercultural short stories for science-fiction periodicals before ''Neuromancer''. Influences on the novel include the detective stories of Raymond Chandler, the comic art of Jean Giraud, and William S. Burroughs's ''Naked Lunch'' (1959). ''Neuromancer'' expanded and popularised the setting and concepts of an earlier Gibson story, "Burning Chrome" (1981), which introduced cyberspace—a digital space traversable by humans—and "jacking in", a bio-mechanical method of interfacing with co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commando (1985 Film)
''Commando'' is a 1985 American action film directed by Mark L. Lester and produced by Joel Silver. It stars Arnold Schwarzenegger in the lead role, alongside Rae Dawn Chong, Alyssa Milano, Vernon Wells, Bill Duke and Dan Hedaya. The musical score was composed by James Horner. ''Commando'' was released in the United States on October 4, 1985, where it received praise for the action sequences and humor. The film became a commercial success at the box office and was nominated for a Saturn Award for Best Special Effects, but lost to ''Back to the Future''. Plot In upstate California, John Matrix, a former United States Army Special Forces colonel, is informed by his former superior, Major General Franklin Kirby, that unknown mercenaries have killed all the other members of his former unit. The assassins attack Matrix's secluded mountain home and kidnap his young daughter, Jenny. While trying to intercept them, Matrix is tranquilized and abducted by the mercenaries, led by Ben ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irving Joshua Matrix
Irving Joshua Matrix — previously known as Irving Joshua Bush and commonly known as Dr. (I. J.) Matrix — is a fictitious polymath scientist, scholar, cowboy, and entrepreneur who made extraordinary contributions to perpetual motion engineering, Biblical cryptography and numerology, pyramid power, pentagonal meditation, extra-sensory perception, psychic metallurgy, and a number of other topics. He is an accomplished prestidigitator and a mathematician. Being a fictitious character he could perform tasks that were logically impossible; for example, he could "clap one hand in the air" when summoning a waiter or a minion.The Magic Numbers Of Dr. Matrix by Martin Gardner, Prometheus Books, 1985, Dr. Matrix was the satirical creation of '' |
Matrix (TV Series)
''Matrix'' is a Canadian fantasy adventure series that ran for 13 episodes in 1993. The series was broadcast by CTV in Canada, and the USA Network in the United States. The series was rebroadcast in 2000. Synopsis The series starred Nick Mancuso as Steven Matrix, a hitman who is killed during a job and sent to a version of Purgatory called The City In-Between. There he is given a choice: to be sent to Hell for all the murders he's committed, or return to Earth and help people. Once alive again, Matrix receives periodic assignments from The City In-Between. Cast * Phillip JarrettBilly Hicks * Carrie-Anne MossLiz Teel * John VernonNarrator Production The central premise of this series may be derived from "Sea of Fire", an episode of the TV series '' The Equalizer''. In that episode, Robert McCall ( Edward Woodward's character) attempts to scare a street gang into going straight by taking them to a morgue. There, McCall introduces the gang to one of his friends, a former h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Gardner
Martin Gardner (October 21, 1914May 22, 2010) was an American popular mathematics and popular science writer with interests also encompassing magic, scientific skepticism, micromagic, philosophy, religion, and literatureespecially the writings of Lewis Carroll, L. Frank Baum, and G. K. Chesterton.Martin (2010) He was a leading authority on Lewis Carroll; '' The Annotated Alice'', which incorporated the text of Carroll's two Alice books, was his most successful work and sold over a million copies.Martin Gardner obituary (2010) He had a lifelong interest in magic and illusion and in 1999, ''MAGIC'' magazine named him as one of the "10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrix App
Matrix was an instant messaging (IM) and communications network that was shut down by cooperation between Dutch and French police in December 2024. It was also known by the names Mactrix, Totalsec, X-Quantum and Q-Safe. History Dutch police discovered the network while investigating the murder of Peter de Vries in 2021. A mobile phone was found in the getaway car. The phone was found to be connected to the Matrix network. A joint task force involving Dutch and French police was formed, with 2.3 million messages in 33 languages intercepted. Police forces in Italy, Lithuania, Spain and Germany were also involved. Europol and Eurojust coordinated the investigation. Infrastructure The service operated on around 40 servers throughout Europe and had about 8000 users. Users paid between $1350 and $1700 in cryptocurrency for a Google Pixel handset and six months subscription to the service. Seizures and arrests Simultaneous raids and searches took place on 3 December 2024 in four countri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
