commutationˌkɒm yəˈteɪ ʃən
commutation (n)
- plural
- commutations
English Definitions:
commutation, commuting (noun)
the travel of a commuter
commutation (noun)
a warrant substituting a lesser punishment for a greater one
commutation, re-sentencing (noun)
(law) the reduction in severity of a punishment imposed by law
substitution, exchange, commutation (noun)
the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help"
commutation (Noun)
A passing from one state to another; change; alteration; mutation.
commutation (Noun)
The act of giving one thing for another; barter; exchange.
commutation (Noun)
Substitution of one thing for another; interchange.
commutation (Noun)
Specifically, the substitution of one kind of payment for another, especially a switch to monetary payment from obligations of labour.
commutation (Noun)
The change to a lesser penalty or punishment by the State
commutation (Noun)
Substitution, as a means of discriminating between phonemes.
commutation (Noun)
The reversal of an electric current.
Commutation
In neurophysiology, commutation is the process of how the brain's neural circuits exhibit non-commutativity. Physiologist Douglas B. Tweed and coworkers consider whether certain neural circuits in the brain exhibit noncommutativity and state: In noncommutative algebra, order makes a difference to multiplication, so that . This feature is necessary for computing rotary motion, because order makes a difference to the combined effect of two rotations. It has therefore been proposed that there are non-commutative operators in the brain circuits that deal with rotations, including motor system circuits that steer the eyes, head and limbs, and sensory system circuits that handle spatial information. This idea is controversial: studies of eye and head control have revealed behaviours that are consistent with non-commutativity in the brain, but none that clearly rules out all commutative models. Tweed goes on to demonstrate non-commutative computation in the vestibulo-ocular reflex by showing that subjects rotated in darkness can hold their gaze points stable in space - correctly computing different final eye-position commands when put through the same two rotations in different orders, in a way that is unattainable by any commutative system.
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"commutation." Kamus.net. STANDS4 LLC, 2024. Web. 23 Apr. 2024. <https://www.kamus.net/english/commutation>.
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