Information Technology Reference
In-Depth Information
Fig. 9.4
A network of 12,691 co-cited references. Each year top 2,000 most cited references were
selected to form the network. The same three-cluster structure is persistent at various levels
CiteSpace provides system-level indicators to measure the quality of a cluster in
terms of its silhouette score, which is an indicator of its homogeneity or consistency.
Silhouette values of homogenous clusters tend to close to one. The change of the
modularity of a network over time can be used to measure the structure of the system
and its stability. In the regenerative medicine example, we have demonstrated
that the Nobel Prize winning discoveries caused a substantial amount of system
perturbation.
Figure
9.4
shows a network of 12,691 co-cited references based on the citation
behavior of top 2,000 papers per year on topics relevant to terrorism. The network
is clearly clustered. The majority of the attention was attracted to areas that have
demonstrated exponential grows as measured in terms of their citation bursts.
9.2
Jigsaw
Jigsaw is developed at Georgia Tech, led by John Stasko, who has been active
in software visualization, information visualization, and visual analytics. Jigsaw
integrates a variety of views for the study of a collection of text. The software
is available at
http://www.cc.gatech.edu/gvu/ii/jigsaw
.
Prospective users are highly
recommended to start with tutorial videos.
1
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