Results 21 to 30 of about 423,592 (152)

Numerical simulations of sunspots [PDF]

, 2006
The origin, structure and evolution of sunspots are investigated using a numerical model. The compressible MHD equations are solved with physical parameter values that approximate the top layer of the solar convection zone.
Hurlburt, Neal, Botha, Gert, Rucklidge, Alistair   +2 more
core   +1 more source

Successive Flux Rope Eruptions from δ-sunspots Region of NOAA 12673 and Associated X-class Eruptive Flares on 2017 September 6 [PDF]

The Astrophysical Journal, 2018
Abstract In this article, we present a multiwavelength analysis of two X-class solar eruptive flares of classes X2.2 and X9.3 that occurred in the sigmoidal active region NOAA 12673 on 2017 September 6, by combining observations of Atmospheric Imaging Assembly and Helioseismic Magnetic Imager instruments on board the Solar Dynamics ...
Prabir K. Mitra, Bhuwan Joshi, Avijeet Prasad, Astrid M. Veronig, R. Bhattacharyya   +4 more
openaire   +2 more sources

A MULTI-INSTRUMENT ANALYSIS OF A C4.1 FLARE OCCURRING IN A δ SUNSPOT

The Astrophysical Journal, 2016
ABSTRACT We present an analysis of multi-instrument space- and ground-based observations relevant to a C4.1 solar flare that occurred in the active region (AR) NOAA 11267 on 2011 August 6. Solar Dynamics Observatory observations indicate that at the flare’s beginning, it was localized in the preceding sunspot of the AR, which exhibits a ...
Salvo L. Guglielmino, M. Falco, A. Cristaldi, A. Cristaldi, P. Romano, Ilaria Ermolli, Serena Criscuoli, Francesca Zuccarello, F. P. Zuccarello   +8 more
openaire   +5 more sources

The Functional Role and Molecular Characterization of the Therapeutic Target CLDN6 in Germ Cell Tumors

Andrology, EarlyView.
ABSTRACT Background The tight junction protein CLDN6 has been identified as a cancer‐associated cell surface marker that is rarely expressed in healthy tissues. In testicular germ cell tumors (GCT), CLDN6 is particularly detectable in seminomas, embryonal carcinomas, and choriocarcinomas.
Jule Zwick, Margaretha A. Skowron, Gereon Poschmann, Patrick Petzsch, Ann Kathrin Bergmann, Kai Stühler, Jochen Hecht, Daniel Nettersheim   +7 more
wiley   +1 more source

Macular telangiectasia type 2 genetic risk variants associated with clinical characteristics in the Slovenian cohort

Acta Ophthalmologica, EarlyView.
Abstract Purpose Early diagnosis of macular telangiectasia type 2 (MacTel) remains challenging, and the contribution of genetic variation to its clinical heterogeneity is unclear. This study investigated associations between MacTel risk variants and clinical characteristics in a Slovenian cohort.
Ajda Kunčič, Nataša Debeljak, Petra Hudler, Janez Smerkolj, Mojca Urbančič   +4 more
wiley   +1 more source

Fine Structure and Formation Mechanism of a Sunspot Bipolar Light Bridge in NOAA AR 13663

The Astrophysical Journal
Bipolar light bridges (BLBs) are bright regions located between sunspot umbrae of opposite magnetic polarity. They are typically characterized by strong magnetic fields and intense flows, which are believed to be closely associated with major solar ...
Fangfang Qiao, Hao Li, Jiasheng Wang, Yadan Duan, Zheng Sun, Leping Li   +5 more
doaj   +1 more source

Optic nerve head blood flow autoregulation during isometric exercise in primary open‐angle glaucoma assessed by laser speckle flowgraphy

Acta Ophthalmologica, EarlyView.
Abstract Purpose To assess optic nerve head blood flow (ONHBF) autoregulation in patients with early‐ to moderate‐stage primary open‐angle glaucoma (POAG) and age‐ and sex‐matched healthy controls using laser speckle flowgraphy (LSFG) and isometric handgrip exercise.
Theresa Lindner, Viktoria Pai, Patrick Janku, Nikolaus Hommer, Anton Hommer, Liudmyla Petric, Ulrich Graf, Leopold Schmetterer, Gerhard Garhöfer, Doreen Schmidl   +9 more
wiley   +1 more source

Geopolitical Risk and Domestic Bank Deposits

Financial Management, EarlyView.
ABSTRACT We investigate the relationship between global geopolitical risk and bank deposit flows across a wide panel of European countries. Motivated by the pivotal role of deposit stability for financial intermediation and systemic resilience, we explore whether geopolitical shocks alter depositors’ portfolio choices.
Dimitris Anastasiou, Theodore Kapopoulos, Steven Ongena, Athanasios Sakkas   +3 more
wiley   +1 more source

Rational Expectations Fools' Bubbles

International Economic Review, EarlyView.
ABSTRACT We develop a rational, Walrasian model of speculative bubbles inspired by the Kindleberger–Minsky view, which describes bubbles as wave‐like market processes. Touched off by an initial shock, price booms are initially self‐reinforcing but become self‐destructive later when prices surpass fundamental value.
Luis Araujo, Antonio Doblas‐Madrid
wiley   +1 more source

Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting

Journal of Time Series Analysis, EarlyView.
ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss, Panagiotis Maouris, Efstathios Paparoditis   +2 more
wiley   +1 more source