Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compilation of Hazardous and Benign Material Complex Dielectric
  Constants at Millimeter Wave Frequencies for Security Applications   This paper compiles measured complex dielectric constants of benign and
hazardous materials used for developing algorithms for personnel scanners at
airports at 30 GHz. The materials are grouped into broad classifications of
potential threat by mapping the materials to the complex dielectric constant
plane.

1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph