Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical similarity between the compression of a porous material and
  earthquakes   It has been long stated that there are profound analogies between fracture
experiments and earthquakes; however, few works attempt a complete
characterization of the parallelisms between these so separate phenomena. We
study the Acoustic Emission events produced during the compression of Vycor
(SiO2). The Gutenberg-Richter law, the modified Omori's law, and the law of
aftershock productivity are found to hold for a minimum of 5 decades, are
independent of the compression rate, and keep stationary for all the duration
of the experiments. The waiting-time distribution fulfills a unified scaling
law with a power-law exponent close to 2.45 for long times, which is explained
in terms of the temporal variations of the activity rate.

22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph