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or daily aggregation) does not yield significant difference in the results, and it
can be described with the size difference in the snapshot network.
Our findings emphasize the importance of preferential attachment in real-
world systems, since the elementary dynamic network models incorporating the
mechanisms of preferential attachments are the closest in behaviour to the trends
found in the empirical data.
In the second case, we found that, based on the change in its density (and other
related statistics, like the average centrailty values), the sexual network dataset
is still in the beginning of the evolution of its cumulative network. Another
interesting finding is that the degree distribution of the network is almost stable
for during the first 2,000 time steps it is exposing a power law pattern, but in
the next 200 a drastical change takes place in it deforming the distribution.
Acknowledgments. This work was partially supported by the European Union
and the European Social Fund through project FuturICT.hu (grant no.: TÁMOP-
4.2.2.C-11/1/KONV-2012-0013).
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