Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Granular materials composed of shape-anisotropic grains   Granulate physics has made considerable progress during the past decades in
the understanding of static and dynamic properties of large ensembles of
interacting macroscopic particles, including the modeling of phenomena like
jamming, segregation and pattern formation, the development of related
industrial applications or traffic flow control. The specific properties of
systems composed of shape-anisotropic (elongated or flattened) particles have
attracted increasing interest in recent years. Orientational order and
self-organization are among the characteristic phenomena that add to the
special features of granular matter of spherical or irregular particles. An
overview of this research field is given.

17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int