نتایج جستجو برای: ratio scale
تعداد نتایج: 1049385 فیلتر نتایج به سال:
Measurements of flow past simulated sinusoidal hills were taken in an atmospheric boundary layer wind tunnel (ABLWT) that modeled typical full-scale complex terrain for many wind turbine locations in the Altamont Pass, California, USA. Velocity profiles and speed-up factors for several model hills were determined. All hills modeled had the same height and sinusoidal cross-section, and length-to...
BACKGROUND This paper examines the Willingness to Pay (WTP) for a quality-adjusted life year (QALY) expressed by people who attended the healthcare system as well as the association of attitude towards risk and other personal characteristics with their response. METHODS Health-state preferences, measured by EuroQol (EQ-5D-3L), were combined with WTP for recovering a perfect health state. WTP ...
INTRODUCTION Biological evidence suggests that vitamin D might be involved in regulating mood. The relationship between 25-hydroxyvitamin D (25OHD) and the onset of depressive symptoms was examined over a 4.4-year follow-up in a sample of older adults. METHODS This research was part of the Progetto Veneto Anziani (Pro.V.A.), an Italian population-based cohort study on a total of 1,039 women a...
By convention, carbon isotope ratios are expressed relative to VPDB defined by the calcite standard NBS19 in 1980s. [See T. Coplen, Pure Appl. Chem. 1994, 66, 273–276.] To improve realization of scale, a second fixed point (lithium carbonate, LSVEC) was introduced 2006 [T. Coplen et al. Anal. 2006, 78, 2439–2441], which is now known be isotopically unstable. [Assonov, S. Rapid Commun. Mass Spec...
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