Results 31 to 40 of about 1,263,681 (273)
The phase relation between sunspot numbers and soft X-ray flares
, 2011 To better understand long-term flare activity, we present a statistical study on soft X-ray flares from May 1976 to May 2008. It is found that the smoothed monthly peak fluxes of C-class, M-class, and X-class flares have a very noticeable time lag of 13,
A. Antalová +28 more
core +1 more source
Discovery of a tight correlation between pulse lag/luminosity and jet-break times: a connection between gamma-ray burst and afterglow properties [PDF]
, 2001 A correlation is presented between the pulse lag and the jet-break time for seven BATSE gamma-ray bursts with known redshifts. This is, to our best knowledge, the first known direct tight correlation between a property of the gamma-ray burst phase (the ...
Galama, Titus J., Salmonson, Jay D.
core +2 more sources
Journal of Lipid Research, 1999 Premenopausal women and postmenopausal women given estrogen are protected from cardiovascular diseases compared with men. Previous studies investigated whether estrogen treatment protects low density lipoprotein (LDL) from in vitro oxidation as a ...
Dawn C. Schwenke +2 more
doaj +1 more source
The variability of optical \feii emission in PG QSO 1700+518
, 2010 It is found that \feii emission contributes significantly to the optical and ultraviolet spectra of most active galactic nuclei. The origin of the optical/UV \feii emission is still a question open to debate.
Baldwin +23 more
core +1 more source
Time-optimal control of time-lag systems with time-lag controls
Journal of Mathematical Analysis and Applications, 1975 AbstractThis paper considers the time-optimal control problem for a class of time-lag systems in which the time-lag is the control variable. It is shown that under certain conditions, the attainable set at any time t is convex, compact, and varies continuously with t. Using this result, a necessary condition for the time-optimal controls in the form of
openaire +1 more source
Existence of anticipatory, complete and lag synchronizations in time-delay systems [PDF]
, 2005 Existence of different kinds of synchronizations, namely anticipatory, complete and lag type synchronizations (both exact and approximate), are shown to be possible in time-delay coupled piecewise linear systems.
Lakshmanan, M., Senthilkumar, D. V.
core +3 more sources
Energies, 2023 Anaerobic digestion technology can play a significant role in the transition to a low-carbon and circular economy by producing bioenergy (biomethane) and organic fertilizer (digestate).
Joana Silva, Rita Fragoso
doaj +1 more source
The time-lag -- photon-index correlation in GX 339--4
, 2018 Black-hole transients exhibit a correlation between the time lag of hard photons with respect to softer ones and the photon index of the hard X-ray power law. The correlation is not very tight and therefore it is necessary to examine it source by source.
Kylafis, N., Reig, P.
core +1 more source
Stochastic Lag Time in Nucleated Linear Self-Assembly [PDF]
, 2016 Protein aggregation is of great importance in biology, e.g., in amyloid fibrillation. The aggregation processes that occur at the cellular scale must be highly stochastic in nature because of the statistical number fluctuations that arise on account of ...
Boal D. +6 more
core +3 more sources
Geo-spatial Information ScienceUnderstanding the feedback and reactions of soil moisture to meteorological factors in meteorological-hydrological processes is essential due to the growing importance of soil moisture in energy and water cycles in critical zones. Using soil moisture and
Qing Tian, Jianzhong Lu, Xiaoling Chen
doaj +1 more source