Results 261 to 270 of about 1,867,915 (314)
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Sampling strategies for linkage studies
European Archives of Psychiatry and Clinical Neuroscience, 1991Broadly there are three alternative sampling strategies for linkage studies of complex disorders such as schizophrenia. These are to select either affected sib pairs (and their parents) or small-to-medium-size pedigrees, or large pedigrees. The advantages and disadvantages of each are discussed.
L R, Goldin, M M, Martinez, E S, Gershon
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Magnetic Studies of Lunar Samples
Science, 1970The remanent magnetism of a lunar type C breccia sample includes a large viscous component with a time constant of several hours, and a high coercivity remanence, possibly acquired by impact processes on the lunar surface. Ilmenite(?) and metallic iron in breccias, and ferrous and metallic iron in glass beads separated from lunar fines (type D) were ...
R R, Doell +3 more
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Unified study of color sampling
Applied Optics, 1989In this study, we unify some previous research work on the design of optimal color sensors and the reconstruction of color signals from color samples. We show that they are all based on a simple linear vectorspace representation derived from the Karhunen-Loeve (K-L) expansion theorem. We also show how this idea works by two simulation examples.
Y L, Chang, P, Liang, S, Hackwood
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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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Studies of a sample of CPM stars
Astrophysics and Space Science, 1988A sample of CPM stars selected from the AGK2/3 is used to investigate the following points: (a) What is the distribution of mass ratios of binaries with wide separations?, and (b) what is the proportion of wide binaries among stars. The distribution previously derived from the visual binaries of the Bright Star Catalogue seem to be an acceptable ...
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Sample Size in the Study of Behaviour
Ethology, 2010AbstractThe choice of an appropriate sample size for a study is a notoriously neglected topic in behavioural research, even though it is of utmost importance and the rules of action are more than clear – or are they? They may be clear if a formal power analysis is concerned.
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Sampling Intervals Verification in Pharmacokinetics Studies
Drug Research, 2013Regulatory agencies do not specify how to plan the sampling intervals in pharmacokinetics (PK) studies. Every interval between each sampling point forms one of the fractions of the area under the curve (AUC). The aim of this study is to propose a method of qualitative evaluation of PK studies, on the basis of the analysis of the partial AUC fields ...
T, Grabowski +3 more
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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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Sampling and Samples in Cross-Cultural Studies
Behavior Science Research, 1976The various samples and sampling universes available to the researcher about to undertake a cross-cultural study are systematically reviewed. Discussed are the Human Relations Area Files, the "World Ethnographic Sample," the Ethnographic Atlas (both the complete atlas as well as the summary version), the Standard Cross-Cultural Sample, the Quality ...
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