Conductor or conduction may refer to:

Music

* Conductor (music), a person who leads a musical ensemble, such as an orchestra. * ''Conductor'' (album), an album by indie rock band The Comas * Conduction, a type of structured free improvisation in music notably practiced by

Butch Morris Lawrence Douglas "Butch" Morris (February 10, 1947 – January 29, 2013) was an American cornetist, composer and conductor. He was known for pioneering his structural improvisation method, ''Conduction'', which he utilized on many recordings. B ...

Mathematics

Conductor (ring theory) In ring theory, a branch of mathematics, the conductor is a measurement of how far apart a commutative ring and an extension ring are. Most often, the larger ring is a domain integrally closed in its field of fractions, and then the conductor m ...

, an ideal of a ring that measures how far it is from being integrally closed *

Conductor of an abelian variety In mathematics, in Diophantine geometry, the conductor of an abelian variety defined over a local or global field ''F'' is a measure of how "bad" the bad reduction at some prime is. It is connected to the ramification in the field generated by t ...

, a description of its bad reduction *

Conductor of a Dirichlet character In analytic number theory and related branches of mathematics, a complex-valued arithmetic function \chi:\mathbb\rightarrow\mathbb is a Dirichlet character of modulus m (where m is a positive integer) if for all integers a and b: :1) \chi ...

, the natural (smallest) modulus for a character * Conductor (class field theory), a modulus describing the ramification in an abelian extension of local or global fields * Artin conductor, an ideal or number associated to a representation of a Galois group of a local or global field * Conductor of a numerical semigroup, the smallest integer in the semigroup such that all subsequent integers are likewise in the semigroup

Physics

* Electrical conductor, an object, substance or material allowing the flow of an electric charge **

Electrical resistivity and conductivity Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows ...

, the movement of charged particles through an electrical conductor **

Electrical resistance and conductance The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is , measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallel ...

** Fast ion conductor, a solid-state electrical conductor which conducts due to the movement of ions **

Mixed conductor Mixed conductors, also known as mixed ion-electron conductors (MIEC), are a single-phase material that has significant conduction ionically and electronically. Due to the mixed conduction, a formally neutral species can transport in a solid and th ...

, a solid state electrical conductor which conducts due to the movement of ions and electrons ** Electrical conduction system of the heart *

Thermal conduction Conduction is the process by which heat is transferred from the hotter end to the colder end of an object. The ability of the object to conduct heat is known as its ''thermal conductivity'', and is denoted . Heat spontaneously flows along a tem ...

, the transfer of thermal energy through matter ** Thermal conductivity * Optical conductor, such as Optical fiber

Transport

Bus conductor Bus conductors (also referred to as conductors, or clippies) were a common feature of many bus services across Europe until the late 1970s and early 1980s. The main reason two-person crews were needed was that most towns and cities used doubl ...

, a person who checks passengers' tickets on a bus * Conductor (rail), a captain of the crew of a train * Conductor (underground railroad), an operative of the ''Underground Railroad'' of the antebellum-era United States which guided slaves to freedom *

Mr. Conductor ''Shining Time Station'' is an American children's television series jointly created by British television producer Britt Allcroft and American television producer Rick Siggelkow. The series was produced by Quality Family Entertainment (the Ame ...

, a character in ''Shining Time Station'' and in ''Thomas and the Magic Railroad''

Other uses

* Conductor (architecture), a traditional name for a downspout * Conductor (company), a provider of SEO services platforms based in New York City * Conductor (military appointment), a senior Warrant Officer appointment in the Royal Logistic Corps and its predecessors * Conductor (software), a microservice orchestration system developed by Netflix * ''The Conductor'' (film), a 2012 Russian film by Pavel Lungin * Part of the palpal bulb of male spiders * In biology, the conductor of a recessive gene or genetic carrier * ''

The Orchestra Conductor ''The Orchestra Conductor'' ( pl, Dyrygent, and also known as ''The Conductor'') is a 1980 Polish drama film directed by Andrzej Wajda. It was entered into the 30th Berlin International Film Festival, where Andrzej Seweryn won the Silver Bear fo ...

'' aka ''The Conductor'', a 1980 Polish film by Andrzej Wajda * A special education teacher who can applies the methods of

conductive pedagogy Conductive pedagogy is pedagogy especially useful for disabled pupils like those with cerebral palsy. The main principles are: * Accepting persons the way they are, recognize their qualities, respect their personalities and use the capacity and the ...

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