Results 101 to 110 of about 838,163 (294)
Least Squares Estimation of Regression Parameters in Mixed Effects Models with Unmeasured Covariates
, 1996 this paper, included covariates may simultaneously be markers for several unmeasured covariates. The weight of a neonate is a marker for body surface area, which in turn is positively related to a component of fluid loss not measured.
Unmeasured Covariates +3 more
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background and Purpose White matter hyperintensities (WMH) are a core neuroimaging marker of cerebral small vessel disease (CSVD). Sleep apnoea (SA) is a recognized vascular risk factor, but its associations with regional WMH burden, short‐interval WMH change and cognitive performance in population‐based cohorts remain incompletely defined. We
Peng Cheng +4 more
wiley +1 more source
COVARIANT QUANTIZATION OF THE SUPERSTRING [PDF]
International Journal of Modern Physics A, 2001 After reviewing the Green-Schwarz superstring using the approach of Siegel, the superstring is covariantly quantized by constructing a BRST operator from the fermionic constraints and a bosonic pure spinor ghost variable. Physical massless vertex operators are constructed and, for the first time, N-point tree amplitudes are computed in a manifestly ...
openaire +5 more sources
Near-Optimal Unit Root Tests with Stationary Covariates with Better Finite Sample Size [PDF]
Numerous tests for integration and cointegration have been proposed in the literature. Since Elliott, Rothemberg and Stock (1996) the search for tests with better power has moved in the direction of finding tests with some optimality properties both in ...
Elena Pesavento
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Collaterals are crucial factors that influence the infarct growth rate (IGR). We aimed to determine whether a comprehensive multimodal collateral score (MCS), incorporating collateral assessment at the arterial, tissue, and venous levels, is associated with functional independence and provides incremental prognostic value over ...
Giorgio Busto +12 more
wiley +1 more source
Involuntary Weight Loss and Late-Life Depression in Korean Older Adults
Iranian Journal of Public Health, 2020 Background: To investigate the association between involuntary weight loss (IWL) and late-life depression (LLD) in a population-based cohort study. Methods: Data (N=6945) obtained from the 2008 baseline and 2011 follow-up assessments of the Living ...
Youngyun JIN +6 more
doaj
Analysis of Microbiome Data in the Presence of Excess Zeros
Frontiers in Microbiology, 2017 Motivation: An important feature of microbiome count data is the presence of a large number of zeros. A common strategy to handle these excess zeros is to add a small number called pseudo-count (e.g., 1).
Abhishek Kaul +3 more
doaj +1 more source
Multi-period credit default prediction with time-varying covariates [PDF]
In credit default prediction models, the need to deal with time-varying covariates often arises. For instance, in the context of corporate default prediction a typical approach is to estimate a hazard model by regressing the hazard rate on time-varying ...
Orth, Walter
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