Fig 4. Conceptual structure of contemporary CS.

As described by a word co-occurrence network [32] based on keywords (original author keywords, delimited by article title) occurrence network for the search conducted on 2015-12-17 resulting in 1935 hits. To be included, each keyword needed to co-occur at least three times with the same keyword in the dataset. Proximity determined by the ForceAtlas2 algorithm [33] in the software package Gephi (version 0.8.2, http://gephi.org). The larger the node, the more frequently the keyword co-occurs (higher total degree). Colors are selected with the modularity filter for “community detection” [34]. Nodes have been moved slightly to make room for the textual labels.