نتایج جستجو برای: filling ratio
تعداد نتایج: 536249 فیلتر نتایج به سال:
BACKGROUND Tissue Doppler parameters correlate with left ventricular (LV) filling pressure and can be useful as prognostic indexes for patients with heart failure. OBJECTIVE Determine whether tissue Doppler parameters can predict events during long term follow-up of outpatients with LV systolic dysfunction. METHODS Retrospective study with 73 patients (aged 60.9+/-12.1 years) who underwent ...
We model solar spectral irradiance variations under the assumption that they are produced by sunspots and faculae alone. The model is based on three components, i.e. quiet Sun, assumed to be temporally invariant, sunspots and faculae whose temporal variations are mimicked using time series of sunspot areas and Mg II core-to-wing ratios. The detailed flux spectrum for each component is employed....
Electron temperatures derived from the He I recombination line ratios, designated T e (He I), are presented for 48 planetary nebulae (PNe). We study the effect that temperature fluctuations inside nebulae have on the T e (He I) value. We show that a comparison between T e (He I) and the electron temperature derived from the Balmer jump of the H I recombination spectrum, designated T e (H I), pr...
The line ratios from coronal gas in Seyferts can be successfully fitted with photoionized clouds of high densities and low volume filling factor. The ionization parameter implied is sufficiently high that models must consider the effect of radiation pressure from the active nucleus. In spite of the nucleus gravitational force, radiation pressure is sufficiently strong to compress and radially a...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید