Results 51 to 60 of about 2,120,250 (297)

Host Galaxies and the Spectral Variability of Quasars [PDF]

, 2001
Brightness variability of QSOs is associated with variations of the spectral energy distribution in the optical-UV range. The observed change of the spectral shape depends on the contribution of the host galaxy. Simulations, taking into account luminosities and spectra expected for the host galaxies, are compared with the observed spectral variability ...
VAGNETTI, FAUSTO, Trevese, D.
openaire   +3 more sources

Intra- and Inter-Individual Spectral Pattern Variability of sEMG in Elbow Flexor Motor Tasks

Sensors
Understanding intra- and inter-individual variability in muscle activation is essential for applications in rehabilitation, ergonomics, and motor control research.
Piotr S. Wawryka, Ludwin Molina Arias, Grzegorz Frankowski, Patryk Ciężarek, Joanna Zyznawska, Jan T. Duda   +5 more
doaj   +1 more source

The spectral variability of FSRQs

, 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.
Gu, Minfeng, Ai, Y. L.
openaire   +2 more sources

A LIBS Spectral Self-Absorption Correction Method Using Voigt Profile Fitting for the Application of Magnesium Analysis in Phosphorus Ore

, 2020
The concentration of MgO is one of the most important parameters in the phosphate ore flotation. The fast detection of the concentration of MgO has great significance for the optimization of the flotation, the improvement of the efficiency and the ...
Sun Lan-xiang, Qi Li-feng, Zeng Peng, Zhang Peng, Yu Hai-bin   +4 more
core   +1 more source

Determinants of short-period heart rate variability in the general population [PDF]

, 2001
Decreased heart rate variability (HRV) is associated with a worse prognosis in a variety of diseases and disorders. We evaluated the determinants of short-period HRV in a random sample of 149 middle-aged men and 137 women from the general population ...
Kuch, Bernhard, Sinnreich, R., Sapoznikov, D., Kark, J. D., Hense, H. W., Eckardstein, A. von, Bolte, H.-D.   +6 more
core   +1 more source

OPTICAL POLARIZATION AND SPECTRAL VARIABILITY IN THE M87 JET [PDF]

The Astrophysical Journal, 2011
14 pages, 7 figures, ApJ, in ...
Perlman, Eric S., Adams, Steven C., Cara, Mihai, Bourque, Matthew, Harris, D. E., Madrid, Juan P., Simons, Raymond C., Clausen-Brown, Eric, Cheung, C. C., Stawarz, Lukasz, Georganopoulos, Markos, Sparks, William B., Biretta, John A.   +12 more
openaire   +4 more sources

Sun-as-a-star variability of Hα and Ca II 854.2 nm lines

Frontiers in Astronomy and Space Sciences
Studies of stellar magnetic fields mostly rely on proxies derived from chromospheric lines, typically forming in the UV and shorter wavelengths and therefore accessible only from space based observatories.
Garrett Zills, Serena Criscuoli, Luca Bertello, Alexei Pevtsov   +3 more
doaj   +1 more source

An examination of the spectral variability in NGC 1365 with Suzaku [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
19 pages, 11 figures, accepted for publication in ...
Brenneman L. W., Risaliti G., Elvis M., Nardini E.   +3 more
openaire   +3 more sources

Acute Neurological Events in Children With Hemoglobin SC Disease: A Multicenter Retrospective Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neurological manifestations in children with hemoglobin SC (HbSC) disease remain insufficiently characterized, particularly regarding acute events. The aim of this study was to describe the spectrum and frequency of acute neurological events in a multicenter cohort of children with HbSC disease.
Célia Paulmin, Bérengère Koehl, Audrey Maudoux, Hanine Mansour, Marie‐Hélène Odievre, Nathalie Garrec, Emilie Georget, Cécile Arnaud, Slimane Allali, Lydia Doumdo, Marie Belloy, Corinne Guitton   +11 more
wiley   +1 more source

Generating Fuzzy Membership Functions for Modeling Wetland Ecosystems From Multispectral Remote Sensing Images

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The inherent fuzziness of wetland ecosystems largely accounts for the spectral variability of wetland ecosystems in remote sensing images. In addition, a limited spatial resolution leads to the presence of many mixed pixels in middle-resolution ...
Jifa Guo, Shihong Du
doaj   +1 more source