compressions


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compressions

(in physical science) regions of high molecular density, such as a great amount of ultrasound energy, within a longitudinal wave.
References in periodicals archive ?
MCDonnell Douglas requested LEAD's imaging compression technology to be incorporated within this Docu Vision application in order to provide the smallest image file size while maintaining the best image quality.
It was extremely gratifying to learn that after testing and evaluating various compression methods available including JPEG, fractal, and wavelet, LEAD's proprietary compression technology (LEAD CMP) was selected for integration into McDonnell Douglas' documentation/data management system," said Rich Little, president of LEAD Technologies Inc.
The lower compression doesn't really mean a sacrifice in distance, as most people think.
Another interesting fact about compression is that there is no industry standard.
These can include % compression, and a sample's shape as reflected by its height, diameter, shape factor or surface to volume ratio.
One response that is normally accepted as a uniform response over a large range of configurations is that the Stress-Strain response of an elastomer compound in compression should be the same if: 1) The sample is compressed in a zero friction condition; 2) it has a stable sample shape; and 3) it has a "uniform" compressed cross-section.
Samples at high % compression can also begin to deviate from this same uniform response, similar to that seen with high shape factor samples.
Measurement and specification of elastomer compound response in compression is an important aspect of elastomer seal properties.
I was very impressed with the technology team at Compression Science and the solutions they are developing to help commercial broadcasters reduce bandwidth without sacrificing digital video quality," said Celso Azevedo, CEO of Compression Science.
While the uniaxial compression test is well documented in ASTM D575, roughness and lubrication were found to affect force-deflections quite significantly.
Friction was ignored in the modeling, which led to a true uniaxial compression mode of deformation.
For ASTM-D575 button compression testing, smooth, industrial platens were used along with steel ones, with the roughest surface "3," as scanned on figure 9.