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Tetrad (other)
Tetrad ('group of 4') or tetrade may refer to: * Tetrad (area), an area 2 km x 2 km square * Tetrad (astronomy), four total lunar eclipses within two years * Tetrad (chromosomal formation) * Tetrad (general relativity), or frame field ** Tetrad formalism, an approach to general relativity * Tetrad (geometry puzzle), a set of four simply connected disjoint planar regions in the plane * Tetrad (meiosis), the four cells produced by meiotic cell division * Tetrad (music), a set of four notes ** Tetrad (chord), a series of four notes * Tetrad (symbol), or tetractys, a triangular figure of ten points arranged in four rows, and mystical symbol * Medical tetrad, a group of four signs or symptoms which characterise a specific medical condition * Nibble, or tetrade, a 4-bit group * a tuple of length 4 * Tetrad Islands, in the Antarctic See also * * 4 * Triad (other) ('group of 3') * Pentad (other) ('group of 5') * Dark tetrad, group of four undesirable personality t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrad (area)
A tetrad is an area 2 km x 2 km square. The term refers to any of the 25 such squares which make up a standard hectad A hectad is an area 10 km x 10 km square. The term has a particular use in connection with the British Ordnance Survey national grid, and then refers to any of the 100 such squares which make up a standard 100 km x 100 km myr .... Tetrads are sometimes used by biologists for reporting the distribution of species to maintain a degree of confidentiality about their data, though the system is not in universal use. The tetrads are labelled from ''A'' to ''Z'' (omitting ''O'') according to the "DINTY" system as shown in the grid below, which takes its name from the letters of the second line. References Units of area {{measurement-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medical Triad
A medical triad is a group of three signs or symptoms, the result of injury to three organs, which characterise a specific medical condition. The appearance of all three signs conjoined together in another patient, points to that the patient has the same medical condition, or diagnosis. A medical tetrad is a group of four, while a pentad is a group of five. Triads Tetrads Pentads See also * Medical eponyms * Pathognomonic * List of eponymously named medical signs References {{reflist Medical lists, Medical triads and pentads Medical triads Medical pentads ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dark Tetrad
The dark triad is a psychological theory of personality, first published by Delroy L. Paulhus and Kevin M. Williams in 2002, that describes three notably offensive, but non-pathological personality types: Machiavellianism, sub-clinical narcissism, and sub-clinical psychopathy. Each of these personality types are called ''dark'' because each is considered to contain malevolent qualities. All three dark triad traits are conceptually distinct although empirical evidence shows them to be overlapping. They are associated with a callous–manipulative interpersonal style. * Narcissism is characterized by grandiosity, pride, egotism, and a lack of empathy. * Machiavellianism is characterized by manipulation and exploitation of others, an absence of morality, unemotional callousness, and a higher level of self-interest. * Psychopathy is characterized by continuous antisocial behavior, impulsivity, selfishness, callous and unemotional traits (CU), and remorselessness. High scores in these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentad (other)
{{disambiguation ...
Pentad ('group of 5') or pentade may refer to: * Pentad (chord), a five-note chord * Pentad (computing), or pentade, a 5-bit group *a division of the solar term *Dramatistic pentad, Kenneth Burke's method of analyzing motivation * Medical pentad, a group of five signs or symptoms which characterise a specific medical condition *a tuple of length 5 See also * 5 * Quintet (other) * Tetrad (other) ('group of 4') * Hexad (other) ('group of 6') * Lustrum, a five-year period in Ancient Rome. * Pentadic numerals * ''p''-adic number * Quinary Quinary (base-5 or pental) is a numeral system with 5 (number), five as the radix, base. A possible origination of a quinary system is that there are five finger, digits on either hand. In the quinary place system, five numerals, from 0 (number) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triad (other)
Triad or triade may refer to: * a group of three Businesses and organisations * Triad (American fraternities), certain historic groupings of seminal college fraternities in North America * Triad (organized crime), a Chinese transnational organized crime syndicate * Triad Broadcasting, an American radio station operator * Triad High School (other), several uses * Triad Hospitals, an American hospital operator * Triad International, a multi-national private investment corporation * Triad Racing Technologies, a body parts and chassis supplier for NASCAR teams * Triad Securities, a finance company * Triad Strategies, an American lobbying firm * Triad Theater, a performing arts venue in New York City Arts and entertainment Fictional characters * The Triad (''Charmed''), fictional characters in the TV series * Triad (superhero), alias of DC Comics' Luornu Durgo Film and television * ''Triad'' (film), a 1938 German film * ''Triads, Yardies and Onion Bhajees'', a 2003 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrad Islands
Tetrad Islands is a group of small islands lying southeast of Borge Point at Mikkelsen Harbor on Trinity Island in the Palmer Archipelago. They were shown on a 1952 Argentine government chart. The name given by the United Kingdom Antarctic Place-Names Committee The UK Antarctic Place-Names Committee (or UK-APC) is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory (BAT) and ... (UK-APC) in 1960 is descriptive; there are four islands in the group. See also * List of Antarctic and sub-Antarctic islands References Islands of the Palmer Archipelago {{PalmerArchipelago-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuple
In mathematics, a tuple is a finite ordered list (sequence) of elements. An -tuple is a sequence (or ordered list) of elements, where is a non-negative integer. There is only one 0-tuple, referred to as ''the empty tuple''. An -tuple is defined inductively using the construction of an ordered pair. Mathematicians usually write tuples by listing the elements within parentheses "" and separated by a comma and a space; for example, denotes a 5-tuple. Sometimes other symbols are used to surround the elements, such as square brackets "nbsp; or angle brackets "⟨ ⟩". Braces "" are used to specify arrays in some programming languages but not in mathematical expressions, as they are the standard notation for sets. The term ''tuple'' can often occur when discussing other mathematical objects, such as vectors. In computer science, tuples come in many forms. Most typed functional programming languages implement tuples directly as product types, tightly associated with algebr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nibble
In computing, a nibble (occasionally nybble, nyble, or nybl to match the spelling of byte) is a four-bit aggregation, or half an octet. It is also known as half-byte or tetrade. In a networking or telecommunication context, the nibble is often called a semi-octet, quadbit, or quartet. A nibble has sixteen () possible values. A nibble can be represented by a single hexadecimal digit (–) and called a hex digit. A full byte (octet) is represented by two hexadecimal digits (–); therefore, it is common to display a byte of information as two nibbles. Sometimes the set of all 256-byte values is represented as a table, which gives easily readable hexadecimal codes for each value. Four-bit computer architectures use groups of four bits as their fundamental unit. Such architectures were used in early microprocessors, pocket calculators and pocket computers. They continue to be used in some microcontrollers. In this context, 4-bit groups were sometimes also called ''characters' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrad (symbol)
The tetractys ( el, τετρακτύς), or tetrad, or the tetractys of the decad is a triangular number, triangular figure consisting of ten points arranged in four rows: one, two, three, and four points in each row, which is the geometrical representation of the fourth triangular number. As a mysticism, mystical symbol, it was very important to the secret worship of Pythagoreanism. There were four seasons, and the number was also associated with planetary motions and music. Pythagorean symbol # The first four numbers symbolize the ''musica universalis'' and the Cosmos as: ## (1) Unity (Monad (philosophy), Monad) ## (2) Dyad (Greek philosophy), Dyad – Power – Limit/Unlimited (peras/Apeiron (cosmology), apeiron) ## (3) Harmony (Triad) ## (4) Kosmos (Tetrad) # The four rows add up to ten, which was unity of a higher order (The Dekad). # The Tetractys symbolizes the classical element, four classical elements—air, fire, water, and earth. # The Tetractys represented the organiz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrad (astronomy)
In astronomy, a tetrad is a set of four total lunar eclipses within two consecutive years. List of tetrad events 1949–2000 2001–51 See also * for statistics by century * Grouping of dark personality traits. * Apocalyptic preaching of |
Tetrad (chord)
In music theory, a tetrachord ( el, τετράχορδoν; lat, tetrachordum) is a series of four notes separated by three intervals. In traditional music theory, a tetrachord always spanned the interval of a perfect fourth, a 4:3 frequency proportion (approx. 498 cents)—but in modern use it means any four-note segment of a scale or tone row, not necessarily related to a particular tuning system. History The name comes from ''tetra'' (from Greek—"four of something") and ''chord'' (from Greek ''chordon''—"string" or "note"). In ancient Greek music theory, ''tetrachord'' signified a segment of the greater and lesser perfect systems bounded by ''immovable'' notes ( ); the notes between these were ''movable'' ( ). It literally means ''four strings'', originally in reference to harp-like instruments such as the lyre or the kithara, with the implicit understanding that the four strings produced adjacent (i.e., conjunct) notes. Modern music theory uses the octave as the basic u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrad (music)
A tetrad is a set of four notes in music theory. When these four notes form a tertian chord they are more specifically called a ''seventh chord'', after the diatonic interval from the root of the chord to its fourth note (in root position close voicing). Four-note chords are often formed of intervals other than thirds in 20th- and 21st-century music, however, where they are more generally referred to as ''tetrads'' (see, for example, , , and ). Allen Forte in his ''The Structure of Atonal Music'' never uses the term "tetrad", but occasionally employs the word ''tetrachord'' to mean any collection of four pitch class In music, a pitch class (p.c. or pc) is a set of all pitches that are a whole number of octaves apart; for example, the pitch class C consists of the Cs in all octaves. "The pitch class C stands for all possible Cs, in whatever octave positio ...es . In 20th-century music theory, such sets of four pitch classes are usually called "tetrachords" (; ). Reference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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