Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Order From Chaos: A Reconsideration of Fundamental Principles   Traditional discussions of the Second Law of Thermodynamics studied the
limits of very specific types of devices, such as heat engines, chemical
reactions, and molecules channeled by valves. Allahverdyan and Nieuwenhuizen
(cond-mat/0110422) have come the closest to proving a more general form of the
Second Law, applicable to field effect devices -- but recently
(cond-mat/0408537) they have observed counterexamples and loopholes. This paper
discusses recent field effect nanotechnologies which might permit a more
substantial counterexample. Efforts were made to disprove the possibility of
extracting electricity from ambient heat, from another perspective -- but these
efforts led only to a new result on the equivalence of classical and quantum
statistics, which may be important to the backwards-time interpretation of
quantum mechanics.

31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin