Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Molecular Dynamics Study of a Thermal Expansion Coefficient: Ti Bulk
  with an Elastic Minimum Image Method   Linear thermal expansion coefficient (TEC) and specific heat of Ti bulk is
investigated by means of molecular dynamics simulation. Elastic Minimum Image
Convention of periodic boundary conditions is introduced to allow the bulk to
adjust its size according to the new temporarily fixed temperature. The TEC and
the specific heat of Ti are compared to the available theoretical and
experimental data.

35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph