Results 301 to 310 of about 516,287 (323)
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Observations of regional strain variations
Journal of Geophysical Research, 1972An array of six strainmeters was used to determine a least-squares regional strain field in southern Nevada. The deformation occurs in several distinct episodes over the 8-month interval analyzed. In each episode the directions of principal axes remain NW and NE, and the deformation is almost entirely pure shear. The end of each episode is marked by an
Rainer Kind, Stewart W. Smith
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Observed phenotypic variation in a Paleozoic bryozoan
Paleobiology, 1995Documentation of morphologic variation within and among fossil species (and larger clades) provides fundamental data needed for studies of evolution, paleoecology, and the systematic foundation required for most fields of paleobiology. In paleontological (and, frequently, biological) studies, morphologic variation is used as a general proxy for genetic
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OBSERVER VARIATION IN THE CLINICAL ASSESSMENT OF STROKE
Age and Ageing, 1976Clinical assessments have to be used in epidemiological studies in the absence of more objective means of establishing diagnosis or recording events in the natural history of disease. This requires the standardization of definition, technique and interpretation as a means of reducing observer variability in clinical examination.
R. G. Smith +4 more
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Observer variation in the interpretation of bone scintigraphy
Journal of Clinical Epidemiology, 1996To assess the reliability of bone scintigraphy, a random sample of 100 bone scans was reviewed twice by each of two physicians. Observer variation in the description and interpretation of bone scintigrams varied by diagnosis. Good to excellent k values were obtained for inter- and intraobserver variation in relation to metastasis or normal scans.
Ruth Hardoff +4 more
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Beat to beat and observer variation of the electrocardiogram
American Heart Journal, 1968Abstract The BBV of selected ECG measurements was studied in an all male series consisting of 29 subjects with and 29 without heart disease. Nine consecutive beats of each of the 58 3-lead orthogonal records, selected to show minimal base-line disturbance, were converted by computer into enlarged digital plots.
Hubert V. Pipberger +5 more
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Observer variation in assessing renal scarring
The British Journal of Radiology, 1980To examine the extent of variation between experienced observers in recognizing renal scarring, 60 intravenous urograms from schoolgirls with bacteriuria were presented separately to three radiologists with a major interest in the radiology of the urinary tract.
Williams La +3 more
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Observer variation and reproducibility of endoscopic ultrasonography
Gastrointestinal Endoscopy, 1995To investigate interobserver variation and reproducibility of endosonographic findings, both experienced and inexperienced endosonographers evaluated depth of tumor invasion (T stage) and presence of lymph node metastasis (N stage) in 50 patients with nonobstructing esophageal carcinoma.
Rosalind U. van Stolk +6 more
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Accuracy and observer variation
Clinical Radiology, 1997P. Robinson, D. Wilson
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Observations of Time Variation in the Sun's Rotation
Science, 1993Observations of solar p-mode frequency splittings obtained at Big Bear Solar Observatory in 1986 and during 1988-90 reveal small (∼1 percent) changes in the sun's subsurface angular velocity with solar cycle. An asymptotic inversion of the splitting data yields the latitude dependence of the rotation rate and shows that the largest changes in the ...
Woodard, M. F., Libbrecht, K. G.
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Observed variations in the dip of the horizon
1896(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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