Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Macroscopic acousto-mechanical analogy of a microbubble   Microbubbles, either in the form of free gas bubbles surrounded by a fluid or
encapsulated bubbles used currently as contrast agents for medical echography,
exhibit complex dynamics under specific acoustic excitations. Nonetheless,
considering their micron size and the complexity of their interaction
phenomenon with ultrasound waves, expensive and complex experiments and/or
simulations are required for their analysis. The behavior of a microbubble
along its equator can be linked to a system of coupled oscillators. In this
study, the oscillatory behavior of a microbubble has been investigated through
an acousto-mechanical analogy based on a ring-shaped chain of coupled pendula.
Observation of parametric vibration modes of the pendula ring excited at
frequencies between $1$ and $5$ Hz is presented. Simulations have been carried
out and show mode mixing phenomena. The relevance of the analogy between a
microbubble and the macroscopic acousto-mechanical setup is discussed and
suggested as an alternative way to investigate the complexity of microbubble
dynamics.

11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg