Results 271 to 280 of about 50,799,135 (318)
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Sampling bias in transgender studies
The Lancet Infectious Diseases, 2013Thus, urban and clinic samples might not represent the sex lives of transgender women in less urban areas, of higher economic positions, or those who are not primarily sexually attracted to men. Although high HIV prevalences can serve as an advocacy instrument in drawing attention to the health of transgender women, labelling a group that experiences ...
Greta R, Bauer, Ayden I, Scheim
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Sampling in software engineering research: a critical review and guidelines
Empirical Software Engineering, 2020Representative sampling appears rare in empirical software engineering research. Not all studies need representative samples, but a general lack of representative sampling undermines a scientific field. This article therefore reports a critical review of
Sebastian Baltes, P. Ralph
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1980
The following compilation of study designs is intended as a resource for both reviewers and practitioners of genetic toxicology. The study designs include the general requirements under Good Laboratory Practices regulations, methodology, and evaluation criteria.
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The following compilation of study designs is intended as a resource for both reviewers and practitioners of genetic toxicology. The study designs include the general requirements under Good Laboratory Practices regulations, methodology, and evaluation criteria.
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Micropaleontological Studies of Lunar Samples
Science, 1970Optical and electron microscopic studies of rock chips and dust from the bulk sample box returned by Apollo 11 and of petrographic thin sections and acid-resistant residues of lunar material have yielded no evidence of indigenous biological activity.
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Sample sizes for bioequivalence studies
Statistics in Medicine, 1991AbstractIn recent years a number of decision rules, based on sound statistical principles, have been proposed for deciding if a test formulation is bioequivalent to a reference formulation. The decision rule based on confidence intervals has been accepted by regulatory agencies, at least by the Food and Drug Administration of the United States.
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Recommendations for Conducting Longitudinal Experience Sampling Studies
Human–Computer Interaction Series, 2021Niels van Berkel, V. Kostakos
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The American Naturalist, 1972
The rarefaction method proposed by Sanders (1968) to allow one to compare the diversity of samples composed of different numbers of individuals and species is compared with the results that would be obtained if smaller random samples were taken from a universe defined by the observed sample. The rarefaction technique overestimates the number of species
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The rarefaction method proposed by Sanders (1968) to allow one to compare the diversity of samples composed of different numbers of individuals and species is compared with the results that would be obtained if smaller random samples were taken from a universe defined by the observed sample. The rarefaction technique overestimates the number of species
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Proceedings / Indian Academy of Sciences, 1948
(i) The incidence of white-fly is highly variable and the maximum variation occurs in leaves. The variations between the clumps and the canes if and when they exist are of a much lesser magnitude. Therefore, increase in the number of leaves alone in a sample is pre-eminently effective in the reduction of error of an estimate.
K. L. Khanna +3 more
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(i) The incidence of white-fly is highly variable and the maximum variation occurs in leaves. The variations between the clumps and the canes if and when they exist are of a much lesser magnitude. Therefore, increase in the number of leaves alone in a sample is pre-eminently effective in the reduction of error of an estimate.
K. L. Khanna +3 more
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Frequent blood sampling studies
2019Frequent blood sampling studies in 10 arhinia patients demonstrating apulsatile LH profiles in all patients. See main text Figure 1 for female patient #11 and Tables 1A and 1B for associated estradiol, testosterone, and inhibin B levels.
Delaney, Angela, Shaw, Natalie
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