SBU CSE 591 - Social Networks Vis (7 pages)

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Social Networks Vis



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Overview Social Networks Vis Supriya Garg Presentation for CSE591 3rd May 2007 Measures in SNA What are social networks A social network is a social structure made of nodes that are tied by one or more specific types of relations such as financial exchange friends kinship airline routes etc The nodes are generally individuals or organizations Social network analysis SNA has emerged as a key technique in modern sociology anthropology sociolinguistics geography social psychology information science and organizational studies What are social networks Key concepts in social networks Growth of social networks visualization Techniques used in social networks visualization Alternatives to the traditional methods Some applications Vizster Flink Betweenness The extent to which a node is directly connected only to those other nodes that are not directly connected to each other Centrality Closeness The degree an individual is near all other individuals in a network It is the inverse of the sum of the shortest distances between each individual and every other person in the network Centrality Degree Its simply the degree of the node Flow betweenness Centrality The degree that a node contributes to sum of maximum flow between all pairs of nodes not that node Centrality Eigenvector It is a measure of the importance of a node in a network It assigns relative scores to all nodes in the network based on the principle that connections to nodes having a high score contribute more to the score of the node in question Measures in SNA cont Social Network Vis Centralization The difference between the n of links for each node divided by maximum possible sum of differences Clustering Coefficient The clustering coefficient is a In his early works Moreno 1934 introduced five important ideas about the proper construction of images of social networks measure of the likelihood that two associates of a node are associates themselves Structural Equivalence Refers to the extent to which actors have



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