Results 131 to 140 of about 2,215,341 (299)
Spectral Variability of Supergiant HD21389
, 2022 Late B- and early A-type supergiants are interesting evolved stars exhibiting photometric variability accompanied by spectral changes. Particularly interesting is a group of pulsating stars named after Deneb as α Cyg variables. Deneb-type variables are known for decades to show variability in both brightness and radial velocities. Despite this group of
Pivoňková, K. +3 more
openaire +1 more source
ENERGY-DEPENDENT POWER SPECTRAL STATES AND ORIGIN OF APERIODIC VARIABILITY IN BLACK HOLE BINARIES
, 2013 We found that the black hole candidate MAXI J1659-152 showed distinct power spectra, i.e., power-law noise (PLN) versus band-limited noise (BLN) plus quasi-periodic oscillations (QPOs) below and above about 2 keV, respectively, in observations with Swift
Zhang, Wenda, Yu, Wenfei
core
The nature of X-ray spectral variability in Seyfert galaxies
, 2003 We use a model-independent technique to investigate the nature of the 2–15 keV X-ray spectral variability in four Seyfert galaxies and distinguish between spectral pivoting and the two-component model for spectral variability.
Taylor, R.D., Uttley, P., McHardy, I.M.
core +1 more source
Directed evolution of enzymes at the crossroads of tradition and innovation
FEBS Open Bio, EarlyView.An iterative cycle of data‐driven enzyme optimization comprising four stages: genetic diversification of a template enzyme, expression of protein variants, high‐throughput evaluation, and machine‐learning‐guided redesign of the next variant library.
Maria Tomkova +2 more
wiley +1 more source
Correlations between Total and Spectral Solar Irradiance Variations
The Astrophysical JournalWe compare short-term (seven solar rotations), wavelength-dependent temporal variations in spectral solar irradiance (SSI) with those from the total solar irradiance (TSI). Using space-based measurements, we empirically find good correlations across most
Greg Kopp +2 more
doaj +1 more source
Quasar spectral slope variability in the optical band
, 2002 We performed a new analysis of B and R light curves of a sample of PG quasars. We confirm the variability-redshift correlation and its explanation in terms of spectral variability, coupled with the increase of rest-frame observing frequency for quasars ...
Vagnetti, F +2 more
core +1 more source
FEBS Open Bio, EarlyView.Lactoferrin promotes wound healing by activating MAPK, PI3K/Akt, and extracellular matrix pathways, enhancing fibroblast remodeling, proliferation, and re‐epithelialization. These mechanisms highlight its therapeutic potential in inflammation control, tissue repair, and remodeling.
Morgana Lüdtke Azevedo +4 more
wiley +1 more source
The Seismic RecordIt has been recognized that the between-event variability of peak ground acceleration (PGA) is significantly smaller than the variability of the stress drop calculated from corner frequency (the spectral stress drop).
Shota Shimmoto
doaj +1 more source
Remotely sensed spectral variability predicts reef fish diversity
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
doaj +1 more source
Wide-band spectral variability of peaked spectrum sources
, 2022 Characterizing spectral variability of radio sources is a technique that offers the ability to determine the astrophysics of the intervening media, source structure, emission, and absorption processes.
Timothy Galvin (23288839) +5 more
core