منابع مشابه
Statistical Assessment of Mediational Effects for Non-Linear Mediational Models
Elucidating causal relationship among variables of interests is critical to epidemiological studies. Such studies often involve mediational models, and require appropriate statistical assessment of mediational effects. However, the current statistical methodologies used to assess mediational effect are limited to linear association. Here, we propose a new definition of mediational effects for a...
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whereQf is the fractional charge of the quark, and the factor of 3 in front counts the three colors for each flavor. The cross section of the pure QED process is σ(e+e− → μ+μ−) = 4πα2/3s. The value of R, which counts directly the number of quarks, both flavor and colors, is expected to be constant so long as the centerof-mass (cm) energy of the annihilated e+e− does not overlap with resonances ...
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We examine a Poisson heuristic for judging the significance of local sequence alignments with gaps. Model parameters are estimated directly from the sequences to be aligned, so that laborious prior simulation studies or database comparisons for the estimation of parameters describing the connection between score and E-value are unnecessary. Simulation studies give evidence that this method give...
متن کاملPlasma vitamin E values in the newborn.
Plasma vitamin E values of newborn infants in a Coloured population of Cape Town have been determined. The mean plasma alpha-tocopherol value was 3,2 +/- 0,8 mg/l. A significant correlation between the plasma alpha-tocopherol level and plasma total lipid content (r = 0,45; P less than 0,001) and plasma cholesterol level (r = 0,65; P less than 0,001) has been found. However, maternal and neonata...
متن کاملConcerning the accuracy of MAST E-values
A recent article on the IMPALA algorithm by Schäffer et al. (1999) gives the misleading impression that the E-values returned by the MAST algorithm (Bailey and Gribskov, 1998) are unreliable. This erroneous conclusion was reached due to an inappropriate protocol in the experiment involving MAST in the IMPALA article. We have tested MAST using a redesigned protocol that causes MAST to behave as ...
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ژورنال
عنوان ژورنال: Epidemiology
سال: 2019
ISSN: 1044-3983
DOI: 10.1097/ede.0000000000001064