Results 31 to 40 of about 1,262,484 (349)

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, A. Veronig, B. Joshi, B.L. Tan, C. L. Xu, D.H. Hathaway, E.W. Maunder, E.W. Maunder, H.A. Garcia, H.W. Newton, K.J. Li, K.J. Li, K.J. Li, K.R. Bromund, L. H. Deng, M. Schwabe, M. Storini, M. Temmer, M. Temmer, M.J. Aschwanden, M.S. Wheatland, O.R. White, R.C. Carrington, R.C. Carrington, R.M. Wilson, U. Feldman, W.J. Wagner, X. L. Yan, Z. Q. Qu   +28 more
core   +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

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, Bentz, Bian, Chen Hu, Elitzur, Greene, Hu, Hu, Hubeny, Jian-Min Wang, Kai Huang, Kaspi, Kaspi, Ke-Liang Huang, Kuehn, Laor, Li Zhang, Marziani, Peterson, Popović, Qi-Rong Yuan, Vestergaard, Vestergaard, Wei-Hao Bian   +23 more
core   +1 more source

Revealing the X-ray source in IRAS 13224-3809 through flux-dependent reverberation lags [PDF]

, 2013
IRAS 13224-3809 was observed in 2011 for 500 ks with the XMM-Newton observatory. We detect highly significant X-ray lags between soft (0.3 - 1 keV) and hard (1.2 - 5 keV) energies. The hard band lags the soft at low frequencies (i.e. hard lag), while the
Cackett, E. M., Fabian, A. C., Kara, E., Miniutti, G., Uttley, P.   +4 more
core   +3 more sources

Lag time for diagnosis and treatment in 1120 retinoblastoma children: Analysis from InPOG-RB-19-01

Indian Journal of Ophthalmology
Setting: Increased lag time for diagnosis and treatment is a key determinant of adverse retinoblastoma (RB) outcomes. Analysis from INPHOG-RB-19-01, a prospective, multicentric study of newly diagnosed RB with regard to lag time and its correlation with ...
Sima Das, Rachna Meel, Amita Mahajan, Rolika Bansal, Vijay Anand Reddy, Subhav Prasad, Neiwete Lomi, Sameer Bakhshi, Seema Kashyap, Kasturi Bhattacharjee, Devjyoti Tripathy, Nishant Verma, Usha Singh, Parag K Shah, Mobashir Sarfraz Ali, Asim Ghosh, Aakar Singh, Santosh G Honavar   +17 more
doaj   +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

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., Buback M., Nitin S. Tiwari, Oosawa F., Paul van der Schoot, Takalo M., van Kampen N. G.   +6 more
core   +3 more sources

Inner Size of a Dust Torus in the Seyfert 1 Galaxy NGC 4151

, 2003
The most intense monitoring observations yet made were carried out on the Seyfert 1 galaxy NGC 4151 in the optical and near-infrared wave-bands. A lag from the optical light curve to the near-infrared light curve was measured.
Antonucci R., Baribaud T., Bruce A. Peterson, Clavel J., Glass I. S., Hiroyuki Tomita, Keigo Enya, Kotilainen J. K., Masahiro Suganuma, Oknyanskij V. L., Oknyanskij V. L., Oknyanskij V. L., Takeo Minezaki, Tsutomu Aoki, Ulrich M.-H., Winkler H., Winkler H., Yoshii Y., Yukiyasu Kobayashi, Yuzuru Yoshii   +19 more
core   +1 more source

Clinical Characteristics and Prognostic Risk Factors for Pediatric B‐Cell Lymphoblastic Lymphoma: A Multicenter Retrospective Cohort Study for China Net Childhood Lymphoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐cell lymphoblastic lymphoma (B‐LBL) represents a rare variety of non‐Hodgkin lymphoma, with limited research on its biology, progression, and management. Methods A retrospective analysis was performed on the clinical characteristics of 256 patients aged ≤18 years who received treatment under the China Net Childhood Lymphoma (CNCL)‐
Zhijuan Liu, Jian Wang, Ling Jin, Yanlong Duan, Fu Li, Yueping Jia, Leping Zhang, Xiaojun Yuan, Wei Liu, Ying Liu, Ansheng Liu, Mincui Zheng, Yunpeng Dai, Lian Jiang, Lirong Sun, Xiaowen Zhai, Rong Liu, Chunju Zhou, Zifen Gao, Yonghong Zhang, Xiaomei Yang   +20 more
wiley   +1 more source