Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A 3D acoustic propagation model for shallow waters based on an indirect
  Boundary Element Method   The purpose of this work is twofold: (a) To present the theoretical
formulation of a 3D acoustic propagation model based on a Boundary Element
Method (BEM), which uses a half-space Green function in place of the more
conventional free-space Green function and (b) to show a numerical
implementation aimed to explore the formulation in simple idealized cases
--controlled by a few parameters--, and provides necessary tests for the
accuracy and performance of the model. The half-space Green's function, which
has been used previously in scattering and diffraction, adds terms to the usual
expressions of the integral operators without altering their continuity
properties. Verifications against the Pekeris waveguide suggest that the model
allows an adequately prediction for the acoustic field. Likewise, numerical
explorations in relation to the necessary mesh size for the description of the
water-sediment interface allow us to conclude that a TL prediction with
acceptable accuracy can be obtained with the use of a bounded mesh around the
desired evaluation region.

34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an