Results 251 to 260 of about 2,241,913 (305)

On the validity of the kubo formulae for transport coefficients

Physics Letters, 1963
Attempts have been made to express transport coefficients in terms of time correlation functions. The validity of these expressions is examined by studying the viscosity coefficient of a diffuse simple gas in classical theory. In the lowest order of density the viscosity relation reduces to the Chapman-Enskog result.
E.G.D. Cohen, M.H.J.J. Ernst
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Is a .51 validity coefficient good? Value sensitivity for interview validity

International Journal of Selection and Assessment, 2017
Human‐resource professionals (n = 201) were presented with meta‐analytic validity coefficients associated with unstructured and structured employment interviews. When presented alone, the unstructured interview received a higher effectiveness rating—despite having a smaller validity coefficient—than the structured interview received (d = −.30).
Scott Highhouse, Margaret E. Brooks, Sami Nesnidol, Stacy Sim   +3 more
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Validated Bounds for Taylor Coefficients of Analytic Functions

Reliable Computing, 2001
The author obtains rigorous bounds for the Taylor coefficients of analytic functions. The methods are based on interval arithmetic and modified versions of Cauchy's estimate. Interval arithmetic is a subject described, for instance, in the following books: \textit{M. S. Petkovic} and \textit{L. D.
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Customised birthweight: Coefficients for an Australian population and validation of the model

Australian and New Zealand Journal of Obstetrics and Gynaecology, 2006
AbstractBackground:  Published birthweight references in Australia do not fully take into account constitutional factors that influence birthweight and therefore may not provide an accurate reference to identify the infant with abnormal growth. Furthermore, studies in other regions that have derived adjusted (customised) birthweight references have ...
Pain, S., Chang, A. M. Z., Flenady, V., Chan, F. Y.   +3 more
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A Predictive Confidence Interval for the Validity Coefficient

The Journal of Experimental Education, 1956
(1956). A Predictive Confidence Interval for the Validity Coefficient. The Journal of Experimental Education: Vol. 24, No. 4, pp. 323-324.
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Validity Coefficients and Correlated Errors in Test Theory

The Journal of Experimental Education, 1977
Simple formulas for test validity in predictor-criterion test situations are derived from the expected-value concept of true score without assuming that error scores on distinct tests are uncorrelated. The formulas apply when scores are not experimentally independent and reduce to the usual results of the classical model if the correlation between ...
Donald W. Zimmerman, Richard H. Williams
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Validation of the Salt Diffusion Coefficient in Porous Materials

2003
The durability of porous building materials largely depends on the transport of liquids and dissolved salts into the material. When the moisture dries out, salts will crystallise introducing important forces in the solid matrix of the porous material. These interaction forces may result in cracking of the material.
Poupeleer, A. S., Carmeliet, J., Roels, S., Van Gemert, D.   +3 more
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Cumulative STF coefficients evaluation and validation

Metascience in Aerospace
<p>Decomposition of geophysical functions in ranks on degrees of components of a single position vector with coefficients in the form of the indexes of tensors, symmetric and traceless on any couple (symmetric and trace free [STF] tensors or deviators), is applied along with decomposition on surface harmonics (scalar, vector, and tensor).
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Three Coefficients for Analyzing the Reliability and Validity of Ratings

Educational and Psychological Measurement, 1985
Three numerical coefficients (V, R, and H) for analyzing the validity and reliability of ratings are described. Each coefficient, which ranges in value from 0 to 1, is computed as the ratio of an obtained to a maximum sum of differences in ratings, or as 1 minus that ratio. Computer programs for calculating the coefficients, their associated individual
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Assay Validation Using the Concordance Correlation Coefficient

Biometrics, 1992
A new reproducibility index, called the concordance correlation coefficient, has been proposed (Lin, 1989, Biometrics 45, 255-268) to evaluate the reproducibility of an assay, method, or instrument. This index includes measurements of precision and accuracy. Based on certain criteria about the allowable losses in precision and accuracy, one can compute
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