Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ridge Network in Crumpled Paper   The network formed by ridges in a straightened sheet of crumpled paper is
studied using a laser profilometer. Square sheets of paper were crumpled into
balls, unfolded and their height profile measured. From these profiles the
imposed ridges were extracted as networks. Nodes were defined as intersections
between ridges, and links as the various ridges connecting the nodes. Many
network and spatial properties have been investigated. The tail of the ridge
length distribution was found to follow a power-law whereas the shorter ridges
followed a log-normal distribution. The degree distribution was found to have
an exponentially decaying tail, and the degree correlation was found to be
disassortative. The facets created by the ridges and the Voronoi diagram formed
by the nodes have also been investigated.

15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex