Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: To the interpretation of the upturn observed by ATIC in heavy nuclei to
  iron ratios   It is argued that the upturn observed in heavy nuclei to iron ratios as
measured in the ATIC experiment could be understood within the model of closed
galaxy with embedded local regions containing the sources of CR (Peters,
Westergaard, 1977). The universal upturn near the energies of 200-300 GeV/n in
the spectra of abundant primary nuclei is also predicted by this model, but it
also predicts the source spectral index to be near 2.5.

26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th