Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the determination of Poisson's ratio of stressed monolayer and
  bilayer submicron thick films   In this paper, the bulge test is used to determine the mechanical properties
of very thin dielectric membranes. Commonly, this experimental method permits
to determine the residual stress (s0) and biaxial Young's modulus (E/(1-u)).
Associating square and rectangular membranes with different length to width
ratios, the Poisson's ratio (u) can also be determined. LPCVD Si3N4 monolayer
and Si3N4/SiO2 bilayer membranes, with thicknesses down to 100 nm, have been
characterized giving results in agreement with literature for Si3N4, E = 212
$\pm$ 14 GPa, s0 = 420 $\pm$ 8 and u = 0.29.

31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga