Everything about Network Analysis totally explained
» For electrical network analysis, see Network analysis (electronics).
Network analysis is the analysis of networks through
network theory (or more generally
graph theory). The networks may be
social,
transportation,
electrical,
biological,
Internet networks, etc.
Analysis includes descriptions of
structure, such as
small-world networks,
social circles or
scale-free networks,
optimisation, such as
Critical Path Analysis and
PERT (Program Evaluation & Review Technique),
dynamics as in
Sequential dynamical systems and properties such as flow assignment.
Centrality measures
Information about the relative importance of nodes and edges in a graph can be obtained through
centrality measures, widely used in disciplines like
sociology. For example,
eigenvector centrality uses the
eigenvectors of the
adjacency matrix to determine nodes that tend to be frequently visited.
Social network analysis
Social network analysis maps relationships between individuals in
social networks. Such individuals are often persons, but may be
groups (including
cliques),
organizations,
nation-states,
web sites, or
citations between scholarly publications (
scientometrics).
Network analysis, and its close cousin
traffic analysis, has significant use in intelligence. By monitoring the communication patterns between the network nodes, its structure can be established. This can be used for uncovering insurgent networks of both hierarchical and
leaderless nature.
Link analysis
Link analysis is a subset of network analysis, exploring associations between objects. An example may be examining the addresses of suspects and victims, the telephone numbers they've dialed and financial transactions that they've partaken in during a given timeframe, and the familial relationships between these subjects as a part of police investigation. Link analysis here provides the crucial relationships and associations between very many objects of different types that are not apparent from isolated pieces of information. Computer-assisted or fully automatic computer-based link analysis is increasingly employed by
banks and
insurance agencies in
fraud detection, by telecommunication operators in telecommunication network analysis, by medical sector in
epidemiology and
pharmacology, in
law enforcement investigations, by
search engines for
relevance rating (and conversely by the
spammers for
spamdexing and by business owners for
search engine optimization), and everywhere else where relationships between many objects have to be analyzed.
Web link analysis
Several
Web search ranking algorithms use link-based centrality metrics, including (in order of appearance)
Marchiori's
Hyper Search,
Google's
PageRank, Kleinberg's
HITS algorithm, and the
TrustRank algorithm. Link analysis is also conducted in information science and communication science in order to understand and extract information from the structure of collections of web pages. For example the analysis might be of the interlinking between politicians' web sites or blogs.
Further Information
Get more info on 'Network Analysis'.
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