Conductor or conduction may refer to:

Music

Conductor (music) Conducting is the art of directing a musical performance, such as an orchestral or choral concert. It has been defined as "the art of directing the simultaneous performance of several players or singers by the use of gesture." The primary duti ...

, 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, 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) In algebraic number theory, the conductor of a finite abelian extension of local or global fields provides a quantitative measure of the ramification in the extension. The definition of the conductor is related to the Artin map. Local conductor Le ...

, a modulus describing the ramification in an abelian extension of local or global fields *

Artin conductor In mathematics, the Artin conductor is a number or ideal associated to a character of a Galois group of a local or global field, introduced by as an expression appearing in the functional equation of an Artin L-function. Local Artin conductors Su ...

, an ideal or number associated to a representation of a Galois group of a local or global field * Conductor of a

numerical semigroup In mathematics, a numerical semigroup is a special kind of a semigroup. Its underlying set is the set of all nonnegative integers except a finite number and the binary operation is the operation of addition of integers. Also, the integer 0 must b ...

, the smallest integer in the semigroup such that all subsequent integers are likewise in the semigroup

Physics

Electrical conductor In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge (electric current) in one or more directions. Materials made of metal are common electrical conductors. Electric current is gener ...

, 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 In materials science, fast ion conductors are solid conductors with highly mobile ions. These materials are important in the area of solid state ionics, and are also known as solid electrolytes and superionic conductors. These materials are usefu ...

, 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 The cardiac conduction system (CCS) (also called the electrical conduction system of the heart) transmits the signals generated by the sinoatrial node – the heart's pacemaker, to cause the heart muscle to contract, and pump blood through the ...

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 The thermal conductivity of a material is a measure of its ability to conduct heat. It is commonly denoted by k, \lambda, or \kappa. Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal ...

* Optical conductor, such as

Optical fiber An optical fiber, or optical fibre in Commonwealth English, is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to ...

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 conductor (North American English) or guard (Commonwealth English) is a train crew member responsible for operational and safety duties that do not involve actual operation of the train/locomotive. The ''conductor'' title is most common in No ...

, a captain of the crew of a train *

Conductor (underground railroad) The Underground Railroad was a network of clandestine routes and safe houses established in the United States during the early- to mid-19th century. It was used by enslaved African Americans primarily to escape into free states and Canada. T ...

, 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 rain gutter, eavestrough, eaves-shoot or surface water collection channel is a component of a water discharge system for a building. It is necessary to prevent water dripping or flowing off roofs in an uncontrolled manner for several reasons ...

, a traditional name for a downspout *

Conductor (company) Conductor, founded in 2006, started as a marketing services company. In 2010, it launched its cloud-based software platform called Conductor Searchlight, which provides SEO and content marketing solutions. The platform also offers suggestions for ...

, a provider of SEO services platforms based in New York City *

Conductor (military appointment) Conductor (Cdr) is an appointment held by a few selected warrant officers class 1 in the Royal Logistic Corps and is one of the most senior appointments that can be held by a warrant officer in the British Army. Previously conductor was the mo ...

, a senior Warrant Officer appointment in the Royal Logistic Corps and its predecessors *

Conductor (software) Conductor is a free and open-source microservice orchestration software platform originally developed by Netflix. Conductor was developed by Netflix to solve the problems of orchestrating microservices and business processes at scale in a clo ...

, a microservice orchestration system developed by Netflix * ''The Conductor'' (film), a 2012 Russian film by Pavel Lungin * Part of the

palpal bulb The two palpal bulbs – also known as palpal organs and genital bulbs – are the copulatory organs of a male spider. They are borne on the last segment of the pedipalps (the front "limbs" of a spider), giving the spider an appearance often descr ...

of male spiders * In biology, the conductor of a recessive gene or

genetic carrier A hereditary carrier (genetic carrier or just carrier), is a person or other organism that has inherited a recessive allele for a genetic trait or mutation but usually does not display that trait or show symptoms of the disease. Carriers are, ho ...

* ''

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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