Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New type of thermoelectric conversion of energy by semiconducting liquid
  anisotropic media   The paper describes preliminary investigations of a new effect in conducting
anisotropic liquids, which leads to thermoelectric conversion of energy.
Nematic liquid crystals with semiconducting dopes are used. A thermoelectric
figure of merit ZT = 0.2 is obtained in experiments. The effect can be
explained by assuming that the thermocurrent in semiconducting nematics, in
contrast to the Seebeck effect, is a nonlinear function of the temperature
gradient and of the temperature itself. Though the discovered effect has to be
further investigated, the data obtained suggest that it can be effectively used
in alternative energy engineering.

8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th