Bipolar Percussion
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Bipolar may refer to:


Astronomy

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Bipolar nebula A bipolar nebula is a type of nebula characterized by two lobes either side of a central star. About 10–20% of planetary nebulae are bipolar. Formation Though the exact causes of this nebular structure are not known, it is often thought to im ...
, a distinctive nebular formation *
Bipolar outflow A bipolar outflow comprises two continuous flows of gas from the poles of a star. Bipolar outflows may be associated with protostars (young, forming stars), or with evolved post-AGB stars (often in the form of bipolar nebulae). Protostars I ...
, two continuous flows of gas from the poles of a star


Mathematics

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Bipolar coordinates Bipolar coordinates are a two-dimensional orthogonal coordinates, orthogonal coordinate system based on the Apollonian circles.Eric W. Weisstein, Concise Encyclopedia of Mathematics CD-ROM, ''Bipolar Coordinates'', CD-ROM edition 1.0, May 20, 19 ...
, a two-dimensional orthogonal coordinate system * Bipolar set, a derivative of a
polar set In functional and convex analysis, and related disciplines of mathematics, the polar set A^ is a special convex set associated to any subset A of a vector space X, lying in the dual space X^. The bipolar of a subset is the polar of A^\circ, but ...
*
Bipolar theorem In mathematics, the bipolar theorem is a theorem in functional analysis that characterizes the bipolar (that is, the polar of the polar) of a set. In convex analysis, the bipolar theorem refers to a necessary and sufficient conditions for a cone ...
, a theorem in convex analysis which provides necessary and sufficient conditions for a cone to be equal to its bipolar


Medicine

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Bipolar disorder Bipolar disorder (BD), previously known as manic depression, is a mental disorder characterized by periods of Depression (mood), depression and periods of abnormally elevated Mood (psychology), mood that each last from days to weeks, and in ...
, a mental disorder that causes periods of depression and periods of elevated mood **
Bipolar I disorder Bipolar I disorder (BD-I; pronounced "type one bipolar disorder") is a type of bipolar spectrum disorder characterized by the occurrence of at least one manic episode, with or without mixed or psychotic features. Most people also, at other ti ...
, a bipolar spectrum disorder characterized by the occurrence of at least one manic or mixed episode **
Bipolar II disorder Bipolar II disorder (BP-II) is a mood disorder on the bipolar spectrum, characterized by at least one episode of hypomania and at least one episode of major depression. Diagnosis for BP-II requires that the individual must never have experienc ...
, a bipolar spectrum disorder characterized by at least one episode of hypomania and at least one episode of major depression ** Bipolar disorder not otherwise specified, a diagnosis for bipolar disorder when it does not fall within the other established sub-types *
Bipolar neuron A bipolar neuron, or bipolar cell, is a type of neuron characterized by having both an axon and a dendrite extending from the soma (cell body) in opposite directions. These neurons are predominantly found in the retina and olfactory system. The em ...
, a type of neuron which has two extensions


Music


Albums

* ''Bipolar'' (Up Dharma Down album), 2008 * ''Bi-Polar'' (Vanilla Ice album), 2001 * ''Bipolar'', a 2009 album by rock group El Cuarteto de Nos * ''Bipolar'', a 2019 EP by American singer-songwriter Yot Club


Songs

* "Bipolar" (Peso Pluma song), 2023 *"Bipolar", a song by Blonde Redhead from their 1997 album ''
Fake Can Be Just as Good ''Fake Can Be Just as Good'' is the third studio album by American alternative rock band Blonde Redhead. It was released on March 11, 1997 by Touch and Go Records. Track listing Personnel Credits are adapted from the album's liner notes. Bl ...
'' * "Bipolar", a song by Gloria Trevi from her 2013 album ''De Película'' * "Bipolar", a song by Gucci Mane from his 2018 album '' Evil Genius'' *"Bipolar", a 2019 song by
Kiiara Kiara Saulters (born May 24, 1995), known professionally as Kiiara, is an American singer-songwriter from Wilmington, Illinois. She is currently signed to Atlantic Records. Her 2015 single "Gold" peaked at number 13 on the ''Billboard'' Hot 10 ...
*"Bi Polar", a 2021 song by
Bhad Bhabie Danielle Peskowitz Bregoli (born March 26, 2003), better known by her stage name Bhad Bhabie (, "bad baby"), is an American rapper and Internet personality. During an appearance on the talk show ''Dr. Phil (talk show), Dr. Phil'' in September ...
*"Bye Bipolar", a song by
Brandy Brandy is a liquor produced by distilling wine. Brandy generally contains 35–60% alcohol by volume (70–120 US proof) and is typically consumed as an after-dinner digestif. Some brandies are aged in wooden casks. Others are coloured ...
from '' B7'', 2020


Technology

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Bipolar electricity transmission A high-voltage direct current (HVDC) electric power transmission system uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. Most HVDC links use voltages betwe ...
, using a pair of conductors in opposite polarity *
Bipolar encoding In telecommunication, bipolar encoding is a type of return-to-zero (RZ) line code, where two nonzero values are used, so that the three values are +, −, and zero. Such a signal is called a duobinary signal. Standard bipolar encodings are designe ...
, a type of line code where two nonzero values are used **
Bipolar violation A bipolar violation, bipolarity violation, or BPV, is a violation of the bipolar encoding rules where two pulses of the same polarity occur without an intervening pulse of the opposite polarity. This indicates an error in the transmission of t ...
, a violation of the bipolar encoding rules *
Bipolar electric motor A bipolar electric motor is an electric motor with only two (hence ''bi-'') poles to its stationary field. They are an example of the simple brushed DC motor, with a commutator. This field may be generated by either a permanent magnet or a fie ...
, an electric motor with only two poles to its stationary field **
Bipolar (locomotive) The Milwaukee Road's class EP-2 comprised five electric locomotives built by General Electric in 1919. They were often known as Bipolars, which referred to the bipolar electric motors they used. Among the most distinctive and powerful electric lo ...
, a locomotive using a bipolar electric motor *
Bipolar signal In telecommunications, a bipolar signal is a signal A signal is both the process and the result of transmission of data over some media accomplished by embedding some variation. Signals are important in multiple subject fields including si ...
, a signal that may assume either of two polarities, neither of which is zero * Lithic reduction: Bipolar percussion (archaeology)


Transistors

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Bipolar junction transistor A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier. A ...
(BJT) *
Heterojunction bipolar transistor A heterojunction bipolar transistor (HBT) is a type of bipolar junction transistor (BJT) that uses different semiconductor materials for the emitter and base regions, creating a heterojunction. The HBT improves on the BJT in that it can handle si ...
(HBT) *
Insulated-gate bipolar transistor An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily forming an electronic switch. It was developed to combine high efficiency with fast switching. It consists of four alternating layers (NPNP) that ...
(IGBT)


Other uses

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Bipolarisation Bipolarisation or bipolarization (American English) in politics, is a state where forces are organized around two rival powers, neither of which can dominate the other. Its application as a model for international relations has given rise to dive ...
or Bipolarity,
polarity in international relations Polarity in international relations is any of the various ways in which power is distributed within the international system. It describes the nature of the international system at any given period of time. One generally distinguishes three types ...
involving two states


See also

* Dipole (disambiguation) {{disambiguation