Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hemispheric Preference and Cyclic Variation of Solar Filament Chirality
  from 2000 to 2016   It is well known that solar filaments are features in the solar atmosphere
which show a hemispheric preference in their chirality. The hemispheric
preference is such that the dextral chirality dominates in the northern
hemisphere while the sinistral chirality dominates in the southern. Determining
the strength and cyclic variation of the degree of this hemispheric preference,
however, is challenging and tedious and thus needs to be automated. In this
paper, we follow Dr. Pietro Bernasconi's algorithm (Bernasconi et al. 2005) to
detect filament chirality with two parallel channels of application. The
algorithm is applied to H-alpha images by "Advanced Automated Filament
Detection and Characterization Code" (AAFDCC) (Bernasconi et al. 2005) or the
algorithm is explained to a human and the human determines the chirality of the
solar filament. We have conducted this exercise on data during the month of
August from years 2000 to 2016 and we found that 83 % of our visually
determined filaments follow the hemispheric chirality preference, while 58 % of
automatically determined filaments follow it. Our visually compiled results
have over 90 % agreement with those of Pevtsov et al. (2003), yet the visually
determined chiralities of filaments disagree with automated determinations
significantly. We find that the hemispheric preference remained the same
between solar cycles 23 and 24 but the preference is very difficult to
determine during the solar minimum of 2008-2010 primarily due to the absence of
filaments.

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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: ao-sci
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The categories of this paper are: patt-sol
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an