Other Network Approaches

Social Network Analysis – 9/11 Terrorist Network


Copyright OrgNet. For a larger view of the image click here.

For more information about this particular study follow this link.


Biotech Industry Network


Copyright Douglas White.

“Biotechnology as a knowledge-based industry involves extensive reliance on organizational learning. This occurs through networks of dense collaborative ties among organizations.” This model shows the “emergence of the industry network of contractual collaborations from 1988-99 in relation to both firm-level organizational and financial changes.”

For more information about this project follow this link.

Citations Network


For a larger view of the image click here.

This concept was initially led by Sid Redner, from Boston University, who showed that the network of scientific papers, connected by citations, has a power law degree distribution. In a test of this concept papers from the Mathematical Physics Archive were examined for reciprocal citation of the authors, yielding the preceding graph, where colors indicate areas of obvious curvature that were then checked for content. The strongest curvature is the area in red, statistical mechanics, which is reasonable given the nature of the database.


The Worm Brain


Copyright Eckmann/Moses. For a larger view of the image click here.

Eckmann and Moses used a curvature analysis as a test in known biological systems to explore if it gave meaningful results. In C. elegans worm they plotted the reciprocal connections between neurons in the worm. The height is proportional to curvature. The red nodes are amphid cells, the yellow nodes are other sensory neurons of the head, and blue nodes are motor neurons of the nerve ring. Only co-links are shown, and triangles are enhanced.