Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Principles of thermal design with nematic liquid crystals   Highly engineered materials are arousing great interest because of their
ability to manipulate heat, as described by coordinate transformation approach.
Based on the recently developed analog gravity models, this paper presents how
a simple device based on nematic liquid crystal can achieve in principle either
thermal concentration or expulsion. These outcomings are shown to stem from
topological properties of a disclination-like structure, induced in the nematic
by anchoring conditions.

22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex