sample


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sample

[′sam·pəl]
(science and technology)
Representative fraction of material tested or analyzed in order to determine the nature, composition, and percentage of specified constituents, and possibly their reactivity.
(statistics)
A selection of a certain collection from a larger collection.

sample

A small specimen of material, or a single unit of many such items to be furnished, which is in conformity with the requirements for the specifications; furnished for review and approval; establishes standards by which work will be judged.

sample

(digital signal processing)
The result of measuring the amplitude of an analog signal at a specified time. In digital signal processing a sample is a signed or unsigned number and the number of samples per second is called the sample rate.
References in periodicals archive ?
Several reasons have been given by these proponents to support their claims that sampling and sample size considerations are not relevant in qualitative research.
A relationship between negative perceptions and anxiety levels was found in both samples (adult r=.67, p<.001; young adult r=.74, p<.001).
"In scientific field work, nothing is more important than the ability to identify your samples, to associate them with your observations and log entries, and to catalog them once they reach the lab," he says.
Super Ultra-Small Angle Neutron Scattering (SUSANS) studies over wave vector transfers of [10.sup.-4] [nm.sup.-1] to [10.sup.-3] [nm.sup.-1] afford information on micrometer-size agglomerates in samples. Using a right-angled magnetic air prism, we have achieved a separation of [approximately equal to] 10 arcsec between [approximately equal to] 2 arcsec wide up- and down-spin peaks of 0.54 nm neutrons.
The researchers aim to make the test sensitive enough to detect ADDLs in blood or urine samples.
(2.) UCLA Center for Health Policy Research, The CHIS 2001 Sample: Response Rate and Representativeness, Los Angeles: UCLA Center for Health Policy Research, 2003.
Importantly, the air samples indicated "total fibers" were well within OSHA-regulated asbestos limits for workers.
The stereobinocular microscope helps identify the various minerals and mineral sites present in a sample. The widefield, low-power stereobinocular microscope gives an erect, three-dimensional image that makes it ideal for manipulating a sample.
Samples were collected from formations of Cambrian, Ordovician, Cretaceous, Palaeogene, and Neogene age over a large area in the Baltic, representing more than 2 km difference in (palaeo-) burial depth of the Palaeozoic rocks.
His subsequent album was called All Samples Cleared.
About one-third of the sample also knew the approximate percentage of the world's population that was Muslim (35%), and could name Pakistan as one of the three countries in the world with the greatest number of Muslims (31%).
Four off-line samples were taken, beginning 5 to 10 minutes following the on-line measurement and after 20 seconds of breath holding.