Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The study of synchronous (by local time) changes of the statistical
  properties of thermal noise and alpha-activity fluctuations of a 239-Pu
  sample   Experimentally obtained and analyzed fine structure of statistical
distributions for two physically independent processes: alpha-decay rate
fluctuations of Pu-239 sample in Pushchino (Moscow region, Russia) and
equilibrium voltage fluctuations (Johnson noise) from metal-film resistor in
Tbilisi (Georgia). Special investigation of histograms shape similarity in
these processes demonstrated majority of previously studied effects, called -
macroscopic fluctuations. Offered qualitative model of the observed effects.

35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess