Results 41 to 50 of about 10,165,445 (355)
Multiwavelength study of 20 jets that emanate from the periphery of active regions [PDF]
, 2016 Aims. We present a multiwavelength analysis of 20 EUV jets which occurred at the periphery of active regions close to sunspots. We discuss the physical parameters of the jets and their relation with other phenomena such as H α surges, nonthermal type-III
Sargam M. Mulay +3 more
semanticscholar +1 more source
Measuring Magnetic Field With Atacama Large Millimeter/Submillimeter Array
Frontiers in Astronomy and Space Sciences, 2020 The article discusses the use of magnetic bremsstrahlung at short radio wavelengths for measuring solar magnetic fields. The polarization and brightness spectra observed at millimeter wavelengths can be used to deduce the vertical component of the ...
Maria Loukitcheva +2 more
doaj +1 more source
Facial expression recognition using optimized active regions
Human-Centric Computing and Information Sciences, 2018 In this paper, we report an effective facial expression recognition system for classifying six or seven basic expressions accurately. Instead of using the whole face region, we define three kinds of active regions, i.e., left eye regions, right eye ...
Ai Sun +4 more
semanticscholar +1 more source
THE ORIGIN OF NET ELECTRIC CURRENTS IN SOLAR ACTIVE REGIONS [PDF]
, 2015 There is a recurring question in solar physics regarding whether or not electric currents are neutralized in active regions (ARs). This question was recently revisited using three-dimensional (3D) magnetohydrodynamic (MHD) numerical simulations of ...
K. Dalmasse +5 more
semanticscholar +1 more source
Solar activity and its evolution across the corona: recent advances
Journal of Space Weather and Space Climate, 2013 Solar magnetism is responsible for the several active phenomena that occur in the solar atmosphere. The consequences of these phenomena on the solar-terrestrial environment and on Space Weather are nowadays clearly recognized, even if not yet fully ...
Zuccarello Francesca +17 more
doaj +1 more source
MEASUREMENTS OF NON-THERMAL LINE WIDTHS IN SOLAR ACTIVE REGIONS [PDF]
, 2015 Spectral line widths are often observed to be larger than can be accounted for by thermal and instrumental broadening alone. This excess broadening is a key observational constraint for both nanoflare and wave dissipation models of coronal heating.
D. Brooks, H. Warren
semanticscholar +1 more source
Preventive Medicine Reports, 2020 Regular physical activity is a key modifiable non-pharmacological treatment to enhance sleep quality, a key predictor of optimal health and wellbeing. Most of the evidence on physical activity and sleep quality is based on studies assessing the effects ...
Jason A. Bennie, Susanne Tittlbach
doaj +1 more source
Evidence of Twisted Flux-Tube Emergence in Active Regions [PDF]
, 2015 Elongated magnetic polarities are observed during the emergence phase of bipolar active regions (ARs). These extended features, called magnetic tongues, are interpreted as a consequence of the azimuthal component of the magnetic flux in the toroidal flux-
M. Poisson +3 more
semanticscholar +1 more source
What Are the Causes of Super Activity of Solar Active Regions?
The Astrophysical Journal, 2023 Flare productivity varies among solar active regions (ARs). This study analyzed 20 ARs of contrasting sunspot areas and flare productivities to understand the super flare productivity of certain ARs.
Suman K. Dhakal, Jie Zhang
doaj +1 more source
Abrupt longitudinal magnetic field changes in flaring active regions [PDF]
, 2010 We characterize the changes in the longitudinal photospheric magnetic field during 38 X-class and 39 M-class flares within $65^{\circ}$ of disk-center using 1-minute GONG magnetograms.
Aschwanden +31 more
core +3 more sources