Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on 'Piezonuclear decay of thorium' by F. Cardone et. al   Subjecting a solution of 228Th to ultrasound (20 kHz, 100W), Cardone et al.
[Phys. Lett. A 373 (2009) 1956] claim to observe an increase in the
transformation or decay rate of 228Th by a factor of 104. The evidence provided
seems however far from conclusive and in part contradictory to the claims made.
In fact, looking at the presented data we find it cannot be taken as
justification to discard the null hypothesis, namely, that the data from
exposed and non exposed samples are drawn from the same distribution. We
suggest a number of additional tests that should be made in order to improve
the quality of the study and test the hypothesis of so-called piezonuclear
reactions.

1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph