نتایج جستجو برای: fwhm
تعداد نتایج: 2910 فیلتر نتایج به سال:
The size of the Gaussian kernel defines the "width" of the curve which determines in turn how much the data is smoothed. The width is not expressed in terms of the standard deviation ?, as customary in statistics, but with the Full Width at Half Maximum (FWHM). In this case the FWHM would be 2.35: The maximum of this curve is y = 0.4 at x = 0. The half maximum is y = 0.2 at x = -1.175 and at x ...
We derive black hole masses for a sample of about 300 AGNs in the redshift range 0 < z < 2.5. We use the same virial velocity measure (FWHM HβBC) for all sources which represents a significant improvement over previous studies. We review methods and caveats for determining AGN black hole masses via the virial assumption for motions in the gas producing low ionization broad emission lines. We de...
In 2014, Kielkopf and Allard (KA) performed a benchmark experiment where they measured the Full Width at Half Maximum (FWHM) of the Hα line at the electron densities Ne by two orders of magnitude greater than the corresponding previous benchmark experiments, namely up to Ne = 1.4 × 10 20 cm-3. No theoretical calculations of the FWHM of the Hα line existed in this range of Ne. In the present pap...
The use of pure heavy hydrocarbons like propane or isobutane has some advantages for drift chaders that measure the specific ionisation for particle identification. With a prototype of the ARGUS drift chamber various gases were tested with a 3 GeV/c electron beam. We found a dE/dx resolution for propane of Fwhm= 10.4% and for isobutane Fwhm = 9.9X, by a factor of + 1.6 better than that for argo...
In December 2003, the SIS-18 delivered a 350 MeV/u intense uranium beam and a record high intensity of more than 4 × 10 particles was achieved. The beam focal spot was elliptic while the beam power profile along the radial direction was Gaussian with a (FWHM)x = 0.85 mm and (FWHM)y = 1.6 mm. The experimentally measured temporal beam power profile is shown in Fig.1 which is very similar to a Gau...
OBJECTIVES In this study, we develop a microdensitometry method using full width at half maximum (FWHM) analysis of the retinal vascular structure in a spectral-domain optical coherence tomography (SD-OCT) image and present the application of this method in the morphometry of arteriolar changes during hypertension. METHODS Two raters using manual and FWHM methods measured retinal vessel outer...
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