FIGURE 4.

Comparative map showing the cumulative publication and cooperation networks across the country. While nodes represent countries, each node’s size is proportional to the number of publications. Based on the number of collaborations, the nodes are arranged in counter-clockwise order and a link between two nodes represents a collaboration. The link’s width indicates the strength of a specific collaboration. Moreover, if the two countries cooperated more closely, the link between them became thicker and hotter.