Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Epidemiological modeling of online social network dynamics   The last decade has seen the rise of immense online social networks (OSNs)
such as MySpace and Facebook. In this paper we use epidemiological models to
explain user adoption and abandonment of OSNs, where adoption is analogous to
infection and abandonment is analogous to recovery. We modify the traditional
SIR model of disease spread by incorporating infectious recovery dynamics such
that contact between a recovered and infected member of the population is
required for recovery. The proposed infectious recovery SIR model (irSIR model)
is validated using publicly available Google search query data for "MySpace" as
a case study of an OSN that has exhibited both adoption and abandonment phases.
The irSIR model is then applied to search query data for "Facebook," which is
just beginning to show the onset of an abandonment phase. Extrapolating the
best fit model into the future predicts a rapid decline in Facebook activity in
the next few years.

19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc