Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonequilibrium distribution function in the presence of a heat flux at
  the interface between two crystals   A one-dimensional harmonic chain model is used to study the non-equilibrium
distribution function of phonons induced by a heat flux across the interface
between two crystals. Conditions are derived which govern the matching of
distribution functions on both sides of the interface. A generalization of the
Enskog--Chapman method for calculating the Kapitza conductance is introduced. A
precise relation is obtained under some simplifications.
  This version contains improved translation, modernized notation, and corrects
one mistake, that does not affect the final formulae.

5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an