compression

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Related to compressional: Compressional wave, Compressional strength

compression

 [kom-presh´un]
1. the act of pressing upon or together; the state of being pressed together.
2. in embryology, the shortening or omission of certain developmental stages.
3. the flattening of soft tissue to improve optical density in radiographic procedures such as mammography.

com·pres·sion

(kom-presh'ŭn),
A squeezing together; the exertion of pressure on a body in such a way as to tend to increase its density; the decrease in a dimension of a body under the action of two external forces directed toward one another in the same straight line.

compression

Clinical medicine Squeezing; pressure on a body or vital structure by 2 or more external forces, where the force is exerted by the bodies in a linear direction toward each other Telemedicine A process used to transmit graphic images by eliminating extraneous data and packaging the file into lean block of data that is de-compressed by the receiver Types Lossless, lossy. See Lossless compression, Lossy compression.

com·pres·sion

(kŏm-presh'ŭn)
A squeezing together; the exertion of pressure on a body to tend to increase its density; the decrease in a dimension of a body under the action of two external forces directed toward one another.

Compression

An increase in pressure from the surrounding water that occurs with increasing diving depth.

com·pres·sion

(kŏm-presh'ŭn)
A squeezing together; the exertion of pressure on a body in such a way as to tend to increase its density.
References in periodicals archive ?
Bulk viscosity of polypropylene (MPa.s) as a function of compressional stress (MPa) at the melt temperature of 205 ([degrees]C) and different compression speeds (mm/min).
The shear wave velocity in sandy sediment is much less than its compressional wave velocity [16,17].
Seismicity of northern Algeria reveals the compressional stress regime with a NNW-SSE direction of compression in the western and central regions as evidenced by the focal mechanisms of many events as the El Asnam, Mascara, Ain Temouchent, Tipaza and Boumerdes earthquakes (Figure 8) (Buforn et al., 2004).
The cost of suggested approach is low, because we could replace the expensive and time consuming coring and the laboratory test with alternative options, as we used compressional and shear sonic velocities for determining the rock mechanic parameters instead of the destructive core test.
2 and 3 shows that this proposed approach still requires that the simple compressional and tensional strengths in a given direction must be equal.
The Appalachian story is one of initial compressional faulting related to Paleozoic shortening, followed by extensional faulting related to Mesozoic rifting (Williams et al.
where [f.sub.c] is the uniaxial compressive strength, E is the elastic modulus, [V.sub.P] is the compressional wave velocity, and [alpha], [beta], a, and b are coefficients determined by experimental results.
The vertical seismic section XX' shows reactivation of the normal faults as compressional ones (Figure 10).
where [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] is incident pulse at the fluid, x = {[x.sub.1], [x.sub.3]}, C([omega]) is scale coefficient for the incident pulse, [H.sup.(2).sub.0] (*) is Hankel's function of second kind and zero order, is circular frequency, [c.sup.F] is compressional wave velocity in the fluid, r = r(x) is the distance from the receiver to the source (incident pulse), k is the wave number, and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] with Im [eta] < 0.
Here we present complex measurements of the resulting elastic waves using AE during impact experiments to determine material parameters, the compressional wave propagation in the target, to quantify fracturing in the target, as well as the localization of the impact.