Results 91 to 100 of about 324,715 (248)

Photometric Activity of the Symbiotic Star CH Cyg During 2008–2011

Open Astronomy, 2012
We present results of UBVRC observations of the symbiotic star CH Cyg before and after optical and X-ray bursts in 2009 at various timescales. Rapid variability was found only during a strong burst (U ~ 9.5 mag) in 2009 October, while during the low ...
Shugarov S., Kolotilov E., Komissarova G., Skopal A., Zemko P.   +4 more
doaj   +1 more source

Case report: Severe sinus tachycardia as a leading manifestation of systemic lupus erythematosus flare

Frontiers in Medicine, 2023
Systemic lupus erythematosus (SLE) is known to have various cardiac manifestations, including arrhythmias and tachycardia. However, it is rare to encounter severe sinus tachycardia as a presenting feature in patients with SLE.
Anas A. Ashour, Shafik Mansour, Mohamad Talal Basrak, Mohammad Altermanini, Bisher Sawaf, Mohamed A. Atta, Mhd Baraa Habib   +6 more
doaj   +1 more source

High-resolution observations of flare precursors in the low solar atmosphere [PDF]

Nature Astronomy, 2017
Solar flares are generally believed to be powered by free magnetic energy stored in the corona1, but the build up of coronal energy alone may be insufficient to trigger the flare to occur2.
Haimin Wang, Chang Liu, K. Ahn, Yan Xu, J. Jing, N. Deng, Nengyi Huang, Rui Liu, K. Kusano, G. Fleishman, D. Gary, W. Cao   +11 more
semanticscholar   +1 more source

Latent Class Analysis Identifies Distinct Phenotypes of Systemic Lupus Erythematosus Predictive of Flares after mRNA COVID-19 Vaccination: Results from the Coronavirus National Vaccine Registry for ImmuNe Diseases SINGapore (CONVIN-SING)

Vaccines, 2023
We recently reported that messenger ribonucleic acid (mRNA) coronavirus disease 2019 (COVID-19) vaccination was associated with flares in 9% of patients with systemic lupus erythematosus (SLE).
Tao Ming Sim, Manjari Lahiri, Margaret Ma, Peter Pak-Moon Cheung, Anselm Mak, Warren Fong, Stanley Angkodjojo, Chuanhui Xu, Kok Ooi Kong, Thaschawee Arkachaisri, Kee Fong Phang, Teck Choon Tan, Qai Ven Yap, Yiong Huak Chan, Melonie Sriranganathan, Tyng Yu Chuah, Nur Emillia Roslan, Yih Jia Poh, Annie Law, Amelia Santosa, Sen Hee Tay   +20 more
doaj   +1 more source

Rapid Buildup of a Magnetic Flux Rope during a Confined X2.2 Class Flare in NOAA AR 12673 [PDF]

Astrophysical Journal, 2018
Magnetic flux ropes (MFRs) are believed to be the core structure in solar eruptions; nevertheless, their formation remains intensely debated. Here we report a rapid buildup process of an MFR system during a confined X2.2 class flare occurred on 2017 ...
Lijuan Liu, Xin Cheng, Yuming Wang, Zhenjun Zhou, Yang Guo, J. Cui   +5 more
semanticscholar   +1 more source

Plaque Psoriasis Exacerbation and COVID-19 Vaccination: Assessing the Characteristics of the Flare and the Exposome Parameters

Vaccines
The diverse patient population and widespread vaccination in the COVD-19 era make vaccine-triggered episodes of psoriasis an ideal model of exposome research.
Emmanouil Karampinis, Myrto-Maria Papadopoulou, Kleoniki Chaidaki, Konstantina-Eirini Georgopoulou, Stavroula Magaliou, Angeliki Viktoria Roussaki Schulze, Dimitrios P. Bogdanos, Efterpi Zafiriou   +7 more
doaj   +1 more source

Seismic Emissions from a Highly Impulsive M6.7 Solar Flare

, 2008
On 10 March 2001 the active region NOAA 9368 produced an unusually impulsive solar flare in close proximity to the solar limb. This flare has previously been studied in great detail, with observations classifying it as a type 1 white-light flare with a ...
A. Kosovichev, A.-C. Donea, A.-C. Donea, A.-C. Donea, A.-C. Donea, C. Lindsey, D. Besliu-Ionescu, H. Moradi, H. Moradi, J. Aboudarham, J. C. Martínez-Oliveros, J.C. Martínez-Oliveros, J.J. Sudol, J.P. Li, M. Aschwanden, M.D. Ding, M.E. Machado, R. Chandra, S.P. Rajaguru, V.V. Zharkova, V.V. Zharkova, V.V. Zharkova, W. Uddin, Y. Liu   +23 more
core   +3 more sources

Dynamic reliability assessment of flare systems by combining fault tree analysis and Bayesian networks

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
Flaring is a combustion process commonly used in the oil and gas industry to dispose flammable waste gases. Flare flameout occurs when these gases escape unburnt from the flare tip causing the discharge of flammable and/or toxic vapor clouds.
Sohag Kabir, Mohammed Taleb-berrouane, Y. Papadopoulos   +2 more
semanticscholar   +1 more source

Solar Flare Prediction Model with Three Machine-learning Algorithms using Ultraviolet Brightening and Vector Magnetograms [PDF]

, 2016
We developed a flare prediction model using machine learning, which is optimized to predict the maximum class of flares occurring in the following 24 hr.
N. Nishizuka, Komei Sugiura, Y. Kubo, M. Den, S. Watari, M. Ishii   +5 more
semanticscholar   +1 more source

The development of lower-atmosphere turbulence early in a solar flare [PDF]

Science Advances, 2018
IRIS observation of the initiation of a solar flare suggests that turbulence helps to heat the Sun’s lower atmosphere. We present the first observational study of the onset and evolution of solar flare turbulence in the lower solar atmosphere on an ...
N. Jeffrey, L. Fletcher, N. Labrosse, P. Simões   +3 more
semanticscholar   +1 more source