Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One of Possible Applications of High-Tc Superconductors   Possible application of a result contradicting to the second law of
thermodynamics is announced. According to this result the chaotic energy of
thermal fluctuation can be transformed in electric energy of direct current in
an inhomogeneous superconducting ring. Although the power of this
transformation is very weak this effect has optimistic perspective of wide
application because useful energy can be obtained from heat energy in the
equilibrium state. It is explain why the second law can be broken in some
quantum systems. In the last years some authors have concluded almost at once
on violation of the second law in different quantum systems: A.E.Allahverdyan
and Th.M.Nieuwenhuizen, PRL 85, 1799 (2000); cond-mat/0011389; V.Capec and
J.Bok Czech. J. of Phys. 49, 1645 (1999); cond-mat/0012056; Physica A 290, 379
(2001); D. Sheehan, Phys. Plasmas 2 (6), 1893 (1995); Phys. Rev.E 61, 4662
(2000); P. Weiss, Science News, 158, 234 (2000).

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The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph