Abstract
In this chapter, we present basic terminologies and concepts of graph theory in addition to a few social network measures that will be used throughout the book. Then we explain more advanced metrics and concepts that would leverage the basic network measures such as estimating blogs and bloggers’ influence scores and focal structures analysis (FSA). These concepts were used in many real-world cases to find coordinating sets of individuals (coordinating groups) in a given graph. All the concepts and measures are described and illustrated with examples. This chapter would provide the readers with basic understanding of graph-theoretic concepts and social network measures that will help understand the concepts of social cyber forensics in the later chapters.
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Notes
- 1.
\(K\ddot {o}nigsberg\) is a city formerly a part of Germany and now it is a part of Russia known as Kaliningrad .
- 2.
A graph consists of vertices connected by edges.
- 3.
A network consists of nodes connected by links.
- 4.
A sociogram consists of actors/points connected by relations.
- 5.
K refers to the number of vertices types in the graph.
- 6.
Q. How many edges are there in a complete and directed graph with N vertices? Ans: (N 2 − N).
- 7.
The small world experiment conducted by the American social psychologist Stanley Milgram in 1967 leverage this concept. In his experiment, he measured the average path length between people in the USA. He found that on average any two randomly selected people living in the USA are connected by 5.5 (or, 6) hops [19]. The phrase “six degrees of separation” is associated with his experiment although he didn’t use this phrase.
- 8.
An ego-alter network is a network in which you are called the “ego” and your friends are called the “alters” [20].
- 9.
Small world networks are known to have a high global clustering coefficient and an average shortest path length that increase slowly as the number of vertices increases. There are many examples of small world networks such as the electric power grids, networks of word co-occurrence, and the biological neural networks just to name a few.
- 10.
Most services are discontinued, e.g., Blogdex (developed by MIT and was shutdown in 2006), BlogPulse (developed by IntelliSeek and was shutdown in 2012), BlogScope (developed by the University of Toronto and was shutdown in 2012), Google Blog Search (BETA) (developed by Google and was shutdown in 2014), and Technorati (developed by Technorati and was shutdown in 2014) [34].
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Al-khateeb, S., Agarwal, N. (2019). Social Network Measures and Analysis. In: Deviance in Social Media and Social Cyber Forensics. SpringerBriefs in Cybersecurity. Springer, Cham. https://doi.org/10.1007/978-3-030-13690-1_2
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