Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Viscoelastic effects in a spherical Gravitational Wave antenna   Internal friction effects are responsible for line widening of the resonance
frequencies in spherical gravitational wave detectors, and result in
exponentially damped oscillations of its eigenmodes with a decay time which is
proportional to the quality factor of the mode and to its inverse frequency. We
study the solutions to the equations of motion for a viscoelastic spherical GW
detector based on various different assumptions about the material's
constituent equations. Quality factor dependence on mode frequency is
determined in each case, and a discussion of its applicability to actual
detectors is made.

17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
18
The categories of this paper are: econ
19
The categories of this paper are: eess