Results 11 to 20 of about 153,264 (305)
Spectral Variability of FSRQs [PDF]
Journal of Astrophysics and Astronomy, 2011 The optical variability of 29 flat spectrum radio quasars in SDSS Stripe 82 region are investigated by using DR7 released multi-epoch data. All FSRQs show variations with overall amplitude ranging from 0.24 mag to 3.46 mag in different sources. About half of FSRQs show a bluer-when-brighter trend, which is commonly observed for blazars.
Minfeng Gu, Y. L. Ai
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Variability of spectral tristimulus values [PDF]
Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1961 As the spectral tristimulus values of the CIE Standard Observer System for Colorimetry are measurable quantities, their variabilities should be known. This paper describes a procedure for deriving "within" and "between" variances and covariances in the spectral tristimulus values, based on color-matching data for individual observers.
Nimeroff, Isadore +2 more
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Spectral Variability in Radio-Loud Quasars [PDF]
Journal of Astrophysics and Astronomy, 2014 5 pages, 3 figures, accepted to JApA, conference proceeding paper for Variability of Blazars - From Jansky to Fermi (VBJF), Dec.
Gu, Minfeng
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Spectral analysis of heart period variability in anorexia nervosa [PDF]
Vojnosanitetski Pregled, 2005 The aim of this study was to investigate the response of autonomic cardiac control to postural change using spectral analysis, in patients with anorexia nervosa.
Platiša Mirjana M. +2 more
doaj +3 more sources
Spectral variability of the particulate backscattering ratio [PDF]
Optics Express, 2007 The spectral dependency of the particulate backscattering ratio is relevant in the fields of ocean color inversion, light field modeling, and inferring particle properties from optical measurements. Aside from theoretical predictions for spherical, homogeneous particles, we have very limited knowledge of the actual in situ spectral variability of the ...
Whitmire, A. L. +3 more
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Remotely sensed spectral variability predicts reef fish diversity [PDF]
Ecological IndicatorsIn terrestrial landscapes, the spectral variability hypothesis (SVH) enables estimation of species diversity from satellite data, thereby allowing biodiversity assessments to be upscaled. Whether the SVH works in the marine realm is an open question.
A.C.B. Bakker +7 more
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Spectral Line Depth Variability in Radial Velocity Spectra [PDF]
, 2022 Stellar active regions, including spots and faculae, can create radial velocity (RV) signals that interfere with the detection and mass measurements of low mass exoplanets.
Plavchan, Peter +5 more
core +2 more sources
Remote Sensing, 2023 In hyperspectral unmixing, dealing with nonlinear mixing effects and spectral variability (SV) is a significant challenge. Traditional linear unmixing can be seriously deteriorated by the coupled residuals of nonlinearity and SV in remote sensing ...
Zhangqiang Yin, Bin Yang
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Applied Sciences, 2022 The purpose of hyperspectral unmixing (HU) is to obtain the spectral features of materials (endmembers) and their proportion (abundance) in a hyperspectral image (HSI).
Baohua Jin +4 more
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Remote Sensing, 2022 During the oil extraction procedure, natural gases escape from wells, and the process of recuperating such gases requires important investments from oil and gas companies. That is why, most often, they favor burning them with flares. This practice, which
Fatima Zohra Benhalouche +3 more
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