Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How well developed are altmetrics? A cross-disciplinary analysis of the
  presence of 'alternative metrics' in scientific publications   In this paper an analysis of the presence and possibilities of altmetrics for
bibliometric and performance analysis is carried out. Using the web based tool
Impact Story, we collected metrics for 20,000 random publications from the Web
of Science. We studied both the presence and distribution of altmetrics in the
set of publications, across fields, document types and over publication years,
as well as the extent to which altmetrics correlate with citation indicators.
The main result of the study is that the altmetrics source that provides the
most metrics is Mendeley, with metrics on readerships for 62.6% of all the
publications studied, other sources only provide marginal information. In terms
of relation with citations, a moderate spearman correlation (r=0.49) has been
found between Mendeley readership counts and citation indicators. Other
possibilities and limitations of these indicators are discussed and future
research lines are outlined.

22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat