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(computer science)
A computer operation in which two numbers are compared as to identity, relative magnitude, or sign.



comparing a gauge or quantity to be measured with a quantity that is reproducible in the measuring process.

Comparisons are made by instruments such as the equal-arm balance, the electric potentiometer, the photometer bench with a photometer, and the comparator for linear standards.



an act of thought by means of which the content of being and cognition is classified, ordered, and evaluated; in comparison, the world is understood to be “coherent” diversity. The act of comparison consists of the pairing of objects for the purpose of clarifying their relationship. Essential to this are the conditions, or bases, of comparison—the attributes that determine precisely what the possible relationships are between objects.

Comparison has meaning only in an aggregate of “homogeneous” objects that form a class. The comparability of objects in a class (tertium comparationis) is realized in terms of the attributes essential for a particular examination; objects comparable in terms of one basis may be incomparable in terms of another. For example, all people are comparable in terms of age, but not all are comparable with respect to “being older.”

The simplest and most important type of relationships revealed by means of comparison are the relationships of identity (equality) and difference. Comparison of this type leads in turn to the concept of universal comparability, that is, the notion that it is always possible to answer the question of whether objects are identical or different. Objects of visual experience are always comparable, although the condition of visibility, or observability, is a significant restriction. In theory, the visual comparison of objects is often impossible, and to compare objects it is necessary to resort to inferences and, eventually, to certain abstractions from which the inferences have been deduced. The supposition of universal comparability is therefore sometimes called the abstraction of comparability. As a rule, the abstraction of comparability is a nontrivial hypothesis and is valid within the framework and on the basis of the main principles of theory.

M. M. NOVOSELOV [24–1047–1; updated]

References in periodicals archive ?
However, specification choices related to obtaining accurate point estimates in difference-in-differences models--including the choice of comparison groups, the choice of the pre-intervention time interval, and addressing violations to the "parallel trends" assumption--have received scant attention in the literature.
In both healthy comparison groups and immunocompromised adults, IgM against Hia concentrations were higher than those of IgG, although the ratio was opposite for IgM and IgG isotypes of antibodies to Hib.
Responses of student participants in the SNC curriculum adoption group (intervention, n = 440) and in the comparison group (n = 249) to the BOE were analyzed using repeated-measures analyses of variance with baseline and one-year follow-up administrations as the repeated measures.
Most published studies that move beyond the impressionistic are limited by small samples, short-term exposure to the arts, self-report measurement bias, or lack of a comparison group.
On average, the IF group took roughly three times longer to reoffend than the comparison group, and the comparison group were convicted for five times as many substantive offences as the IF group.
The gait temporal-distance measurements during walking for exercise group and comparison group are shown in Table 2.
Few significant differences were found between intervention and comparison group characteristics; however, intervention group parents were significantly older (M = 44.
Table 5 presents ratios of base period to 6-month hospitalization rates for HF-only and diabetes mellitus-only beneficiaries for the intervention and comparison groups.
The purpose of this investigation was not to separate and examine individual components of the IMSE supplemental reading program; the purpose was to study the effectiveness of this program in a real-world setting in which the teachers in the treatment group implemented this program and the comparison group teachers did not.
In addition, there was also a significantly thicker endometrium in the treatment group after treatment than in the comparison group.
At pretest, no children in either treatment or comparison groups had scores that placed them in the higher stanines (7-9).
Table 1 Adolescents' social life, emotional state, and feelings toward parents, by research and comparison groups.

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