نتایج جستجو برای: flare
تعداد نتایج: 8240 فیلتر نتایج به سال:
BACKGROUND Systemic Lupus Erythematosus (SLE) is characterised by fluctuating periods of minimal disease activity and 'flare'. Flare is an important outcome variable impacting the disease burden associated with SLE. The objective of this study was to obtain population-based utility values for varying severities of flare to measure the impact on health-related quality of life (HRQoL) in Australi...
PURPOSE Existing flare photometers are based on the Tyndall effect, which requires sophisticated laser photometry. The ocular flare analysis meter (OFAM) is a nonlaser photometer that uses quantitative Rayleigh scatter and absorption from visible light to compute a flare value. This study is designed to correlate OFAM measurements with qualitative measurements of flare in vitro and in vivo. M...
This article discusses statistical models for solar flare interval distribution in individual active regions. We analyzed solar flare data in 55 active regions that are listed in the Geosynchronous Operational Environmental Satellite (GOES) soft X-ray flare catalog for the years from 1981 to 2005. We discuss some problems with a conventional procedure to derive probability density functions fro...
The continuous emission spectra of Hα, Hβ, and Hγ wave bands of the solar flare of 5 July 1989 have been analysed. We demonstrate that the flare not only emits at the line centres and wings of Hα, Hβ, and Hγ, but also in the continuum near these lines. The positions, durations, and configurations of the four flare kernels are respectively similar to those of a white light flare (WLF). Therefore...
In the framework of solar flare/coronal mass ejection theory, we propose a theoretical model for magnetar giant flare, which can explain the flaring activity on 2004 December 27 from SGR1806-20 comprehensively. As is the case with solar flare, explosive magnetic reconnection in magnetosphere takes a major role in the energetics of magnetar flare. However, cooling and energy transport processes ...
OBJECTIVE To determine the level of agreement of disease flare severity (distinguishing severe, moderate, and mild flare and persistent disease activity) in a large paper-patient exercise involving 988 individual cases of systemic lupus erythematosus. METHODS A total of 988 individual lupus case histories were assessed by 3 individual physicians. Complete agreement about the degree of flare (...
We have calculated the Hα and Ca ii 8542Å line profiles based on four different atmospheric models, including the effects of nonthermal electron beams with various energy fluxes. These two lines have different responses to thermal and nonthermal effects, and can be used to diagnose the thermal and nonther-mal heating processes. We apply our method to an X-class flare that occurred on 2001 Octob...
Mark A. Hughes,* Weijia Yang, and Daniel W. Hewak Toyota Technological Institute, 2-12-1, Hisakata, Tempaku, Nagoya 468-8511, Japan Université de Paris Sud 11, Institut de Chimie Moléculaire et des Matériaux d’Orsay, Laboratoire de Physico-Chimie de L’Etat Solide, UMR CNRS-UPS 8182, Bât. 410, 91405 Orsay Cedex, France Optoelectronics Research Centre, University of Southampton, Southampton SO17 ...
We present a 20 ks XMM-Newton observation of the prototypical Narrow-Line Seyfert 1 galaxy I Zw 1. The best-fit model to the data is a double blackbody plus a dominant power-law, on which complex soft absorption (possibly a blended edge or absorption lines) and/or OVII emission are superimposed, as well as strong Fe Kα emission. The iron feature in the high-energy spectra appears broad; however...
GRB050904 is very interesting since it is by far the most distant GRB event known to date (z = 6.29). It was reported that during the prompt high energy emission phase, a very bright optical flare was detected, and it was temporal coincident with an X-ray flare. Here we use two models to explain the optical flare, One is the “late internal shock model”, in which the optical flare is produced by...
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