Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ITS-90 after definition of neon isotopic reference composition.
  Extent of the isotopic effect on previous inter-comparison results   Starting from the end of the past century, the importance has been recognized
of the effect of isotopic composition on some of the temperature fixed points
for the most accurate realizations of the ITS-90. In the original definition of
the latter, dating back to 1990, only a generic reference was made to natural
composition of the substances used for the realization of the fixed points,
except for helium. The definition of a reference isotopic composition for three
fixed points, e-H2, Ne and H2O, while eliminating the non-uniqueness of the
Scale in this respect, induced detectable differences in the present and future
realizations of the Scale, at the highest accuracy level, with respect to the
previous realizations, when they affected the results of past key comparisons,
namely the K1 and K1.1, and K2 and K2.1 to K2.5 and the related regional and
supplementary ones. The paper provides evidence of the extent of this effect by
using the results of the relevant key comparisons for Neon archived in the BIPM
KCDB, and of other comparisons existing in the literature: 1979-1984, 2007-2012
and 2009-2010 sealed cell comparisons; and discusses the meaning and the
outcomes of this evaluation.

31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat