Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tracking of magnetic flux concentrations over a five-day observation and
  an insight into surface magnetic flux transport   The solar dynamo problem is the question of how the cyclic variation in the
solar magnetic field is maintained. One of the important processes is the
transport of magnetic flux by surface convection. To reveal this process, the
dependence of the squared displacement of magnetic flux concentrations upon the
elapsed time is investigated in this paper via a feature-recognition technique
and a continual five-day magnetogram. This represents the longest time scale
over which a satellite observation has ever been performed for this problem.
The dependence is found to follow a power-law and differ significantly from
that of diffusion transport. Furthermore there is a change in the behavior at a
spatial scale of 10^{3.8} km. A super-diffusion behavior with an index of 1.4
is found on smaller scales, while changing to a sub-diffusion behavior with an
index of 0.6 on larger ones. I interpret this difference in the transport
regime as coming from the network-flow pattern.

5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex