Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Programmable Mechanical Resonances in MEMS by Localized Joule Heating of
  Phase Change Materials   A programmable micromechanical resonator based on a VO2 thin film is
reported. Multiple mechanical eigenfrequency states are programmed using Joule
heating as local power source, gradually driving the phase transition of VO2
around its Metal-Insulator transition temperature. Phase coexistence of domains
is used to tune the stiffness of the device via local control of internal
stresses and mechanical properties. This study opens perspectives for
developing mechanically configurable nanostructure arrays.

2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin