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Attitude of trainees toward tribal entrepreneurship training on solar lantern development in Ladakh: a descriptive study. [PDF]

Front Sociol
Rafee M, Gotherwal SK, Dolma T, Sharma A, Rafiq R, Khenrab S.   +5 more
europepmc   +1 more source

Helicity of Solar Active Regions with Solar Cycles

EAS Publications Series, 2012
The helicity is an important quantity to present the basic topological configuration of magnetic field in the solar atmosphere. In this paper, we present the observational magnetic helicity in solar active regions with solar cycles and the corresponding possible model.
H. Zhang
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Twist of magnetic fields in solar active regions

Journal of Astrophysics and Astronomy, 2000
Extended abstractIn the solar atmosphere, the magnetic and current helicity have played an important role in the study of twisted magnetic field. Current helicity parameterh∥=B∥· (∇ ×B)∥and force free factorcan be used to analyze the distribution of twisted field (current helicity) in the photosphere (Seehafer 1990; Pevtsovet al.1995; Bao &amp ...
Hongqi Zhang, Lirong Tian, Shudong Bao   +2 more
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Infrared Photometry of Solar Active Regions

International Astronomical Union Colloquium, 2000
AbstractSimultaneous time series of broad-band images of two active regions close to the disk center were acquired at the maximum (0.80μm) and minimum (1.55μm) continuum opacities. Dark faculae are detected in images obtained as weighted intensity differences between both wavelength bands. The elements of quiet regions can be clearly distinguished from
M. Sobotka, M. Vázquez, M. Sánchez Cuberes, J. A. Bonet, A. Hanslmeier   +4 more
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Representing Solar Active Regions with Triangulations

1998
The solar chromosphere consists of three classes which contribute differently to ultraviolet radiation reaching the earth. We describe a data set of solar images, means of segmenting the images into the constituent classes, and a novel high-level representation for compact objects based on a triangulated spatial ‘membership function’.
Michael J. Turmon, Saleem Mukhtar
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Dominating active regions in the minima of solar activity

Proceedings of the International Astronomical Union, 2023
AbstractDuring minima of solar activity, it is possible to estimate the influence of convection zone turbulence on the magnetic flux tubes forming active regions (ARs), because the toroidal field of the old cycle weakens, and the new toroidal field is still weak. We analyzed ARs of solar minima between 23-24 and 24-25 solar cycles.
R. A. Suleymanova, V. I. Abramenko
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Cyclotron lines in the spectra of solar flares and solar active regions

Solar Physics, 1989
AbstractIt was shown by Zheleznyakov and Zlotnik (1980a, b) that in complex configurations of solar magnetic fields (in hot loops above the active centres, in neutral current sheets in the preflare phase, in hot X-ray kernels in the initial flare phase) a system of cyclotron lines in the spectrum of microwave radiation is likely to be formed.
V. V. Zheleznyakov, E. Ya. Zlotnik
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Active Region Evolution and Solar Flux Variations

Solar Physics, 1994
The goal of this study is to relate the changes in the solar radiative output to the growth and decay of magnetic active regions. We will test the assumption that each index of radiation variability is a convolution of an active-region magnetic driving function and a response function.
T. P. Hartsell, P. L. Bornmann
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Spectra of Solar Activity Regions

1965
From the brilliant lecture of Professor Minnaert we have learned how poor our knowledge is of the physical state of the undisturbed quiet solar atmosphere. But if we turn our attention to the phenomena of solar activity the position is still worse because only during the two past decades we accumulated more or less systematically important ...
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