23-11-2012, 11:46 AM
SOCIAL NETWORKS
SOCIAL NETWORKS.ppt (Size: 1.96 MB / Downloads: 208)
Social Networks
How do you explain to say somebody what Social Network is? What Social Network Analysis is?
Network Analysis is the keyword
For the 21st Century
Researchers , Politicians , People talk
about Networks around you.
How do you explain what network is?
A social network is a description of the social structure between actors, mostly individuals or organizations. It indicates the ways in which they are connected through various social familiarities ranging from casual acquaintance to close familiar bonds.
Social Networks and KMS
What ties Information Architecture,
Knowledge Management and
Social Network Analysis more closely together is the reciprocal relationship between people and content.
Social Network Analysis
Social network analysis [SNA] is the mapping and measuring of relationships and flows between people, groups, organizations, computers or other information/knowledge processing entities.
The nodes in the network are the people and groups while the links show relationships or flows between the nodes.
We measure Social Network in terms of:
1. Degree Centrality:
The number of direct connections a node has. What really matters is where those connections lead to and how they connect the otherwise unconnected.
2. Betweenness Centrality:
A node with high betweenness has great influence over what flows in the network indicating important links and single point of failure.
3. Closeness Centrality:
The measure of closeness of a node which are close to everyone else. The pattern of the direct and indirect ties allows the nodes any other node in the network more quickly than anyone else. They have the shortest paths to all others.
SNA and KMS:
SNA helps in analyzing the following facts in a KMS:
Bottlenecks - Central nodes that provide the only connection between different parts of the network.
Number of links - Insufficient or excessive links between departments that must coordinate effectively.
Average distance - Degrees of separation connecting all pairs of nodes in the group.
Application of SNA:
Realizing 9/11 Al- Qaeda Network.
Build a grass roots political campaign.
Determine influential journalists and analysts in the IT industry.
Map executive's personal network based on email flows.
Discover the network of Innovators in a regional economy.
Analyze book selling patterns to position a new book and many more……