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Spectral Analysis of Cardiovascular Variability Signals
1998It is well known that the control mechanisms of heart rate and blood pressure, as well as of many other cardiovascular parameters, manifest themselves though beat-to-beat variations in the related signals1,2. The quantification of these variations, both in control conditions and after provocative tests, plays a fundamental role for a better ...
CERUTTI, SERGIO +3 more
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Astrophysics, 1994
In careful analysis of the CCD-spectra of P Cyg it was possible to identify 10 of the 43 lines that have been unidentified up to now. The majority of the latter belong to multiply ionized atoms. The conclusion is reached that there is anomalous heating in certain layers of the stellar wind.
G. L. Israelyan, A. G. Nikogosyan
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In careful analysis of the CCD-spectra of P Cyg it was possible to identify 10 of the 43 lines that have been unidentified up to now. The majority of the latter belong to multiply ionized atoms. The conclusion is reached that there is anomalous heating in certain layers of the stellar wind.
G. L. Israelyan, A. G. Nikogosyan
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Optical Spectral Variability of Blazars
Journal of Astrophysics and Astronomy, 2014It is well established that blazars show flux variations in the complete electromagnetic (EM) spectrum on all possible time scales ranging from a few tens of minutes to several years. Here, we report the review of optical flux and spectral variability properties of different classes of blazars on IDV and STV time-scales. Our analysis show HSPs are less
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Variability of the endmembers in spectral unmixing
2019Spectral unmixing is an inverse problem in hyperspectral imaging that aims at recovering the spectra of the pure constituents of an image (called endmembers), as well as at estimating the proportions of said materials in each pixel (called abundances).
Drumetz, Lucas +2 more
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Spectral study of the irregular variables
Astrophysics, 1985Nineteen spectrograms for three variables with periodic fadings of the, namely, SV Cep, UX Ori, and DD Ser, obtained on the two meter telescope of the Shemakha Astrophysical Observatory with a reciprocal dispersion of 94 A/mm in H..gamma.., were used to compile a two dimensional quantitative spectral classification of those variables.
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2015
Older ground-based observations are reprocessed in order to assess the spectral variability of Ceres surface before the beginning of observations by the Dawn spacecraft. Ceres was observed with NACO on the VLT in 2004 and 2005, producing resolved spectra of the disk under different attitudes.
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Older ground-based observations are reprocessed in order to assess the spectral variability of Ceres surface before the beginning of observations by the Dawn spacecraft. Ceres was observed with NACO on the VLT in 2004 and 2005, producing resolved spectra of the disk under different attitudes.
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VARIABILITY OF SPECTRAL DISTRIBUTIONS OF LED
CIE x051:2025 Proceedings of the CIE 2025 Midterm Meeting Vienna, Austria, July 4-11, 2025: Scientific Conference (July 7-9, 2025)This paper investigates the variability of spectral characteristics among LED light sources with similar correlated colour temperature (CCT), using a dataset of 1752 measured spectral distributions. We evaluate how well CCT predicts two widely used metrics: the melanopic daylight efficacy ratio (MDER), relevant for human-centric lighting, and the G ...
Anders Thorseth +3 more
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Unmixing With Spectral Variability for Marine Mucilage Analysis
2023 13th Workshop on Hyperspectral Imaging and Signal Processing: Evolution in Remote Sensing (WHISPERS), 2023Çagatay Esi +2 more
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On the spectral analysis of blood pressure variability
American Journal of Physiology-Heart and Circulatory Physiology, 1986R W, de Boer +2 more
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Spectral Variability Augmented Two-Stream Network for Hyperspectral Sparse Unmixing
IEEE Geoscience and Remote Sensing Letters, 2022Qian Du, Yan Feng, Shaohui Mei
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