contraction


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Related to contraction: muscle contraction

contraction,

in physics: see expansionexpansion,
in physics, increase in volume resulting from an increase in temperature. Contraction is the reverse process. When heat is applied to a body, the rate of vibration and the distances between the molecules composing it are increased and, hence, the space occupied by the
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.

contraction,

in writing: see abbreviationabbreviation,
in writing, arbitrary shortening of a word, usually by cutting off letters from the end, as in U.S. and Gen. (General). Contraction serves the same purpose but is understood strictly to be the shortening of a word by cutting out letters in the middle, the omission
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.

contraction

[kən′trak·shən]
(graphic arts)
A microfilm defect in the form of a compressed image that occurs when the film speed is reduced as the document passes through a rotary microfilmer.
(mathematics)
A function f from a metric space to itself for which there is a constant K that is less than 1 such that, for any two elements in the space, a and b, the distance between f (a) and f (b) is less than K times the distance between a and b.
(mechanics)
The action or process of becoming smaller or pressed together, as a gas on cooling.
(physiology)
Shortening of the fibers of muscle tissue.

contraction

Of concrete, the sum of volume changes occurring as the result of all processes affecting the bulk volume of a mass of concrete.

contraction

1. Physiol any normal shortening or tensing of an organ or part, esp of a muscle, e.g. during childbirth
2. Pathol any abnormal tightening or shrinking of an organ or part

contraction

References in periodicals archive ?
Insulin induces airway smooth muscle contraction. Br J Pharmacol 2007; 150: 136-42.7.
"Although the error pertaining to the projections for 2015 presented here is relatively large, the evidence for a more protracted activity contraction is consistent with some of the attributes of this recession, such as high private and public sector indebtedness levels, adverse credit conditions and deleveraging, weighing further on domestic demand, most notably investment," the ERC said.
Surface electromyography was used to assess changes in muscles involved in isometric contraction. A two-channel EMG system was used to record the SEMG signal during the isometric contraction (iWorks system Model 214, Dover, USA).
The expected contraction in the current account deficit during 2019 is mainly attributed to an increase in secondary income, and improvement in trade balance.
Since [f.sub.i] is a weak contraction, by the condition of Krasnoselskii-Stetsenko [KrSt69], whose equivalence with Browder's definition is established by Jachymski [J97, Theorem 1 (d)], there exists a continuous function [[psi].sub.i] : [0, +[infinity]) [right arrow] [0, +[infinity]) such that [[psi].sub.i](t) > 0 if t > 0, and,
As shown in Figure 1, the average contraction strain of cement mortar increases with time and finally tends to be stable.
Although the contraction was slower than that of the previous month, the resulting political tensions worsened business activity at the Lebanese private companies, which was reflected in the dropping levels of output and new orders."
The uterine contractions were recorded on a chart recorder (Biodevices, Ambala, India).
A rapid contraction phase during the first 24 hours was observed for all seeding densities of hMSC (passage 4), with the gels contracting by approximately 20% (Figure 2a).
The maximal elbow flexion and voluntary extension contraction torques were determined for each subject using maximum voluntary isometric elbow flexion and extension contraction (MVC) tests.
Mouse ASM contraction was measured in TRs as previously described [17].
The neuromuscular activity during muscle contraction has been studied in depth by means of electromyography (EMG) and mechanomyography (MMG) signals (e.g., [1, 2]).

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