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Transcript of Information Networks
Networks are Everywhere...
Give an Example!
Internet: the computer data network; the vertices are computers and the edges are are physical data connections between them (fiber cables- telephone lines)
Why to study the network of the Internet?
people and relationships (connections)
friendship- business- work
data collection involves (questionnaire and direct observations)
Networks in Biology
Neural Networks: networks of connections between neurons in the brain.
food web- directed network
What is a Network
Networks are collections of points joined together by lines (Newman, 2010).
points = are referred as vertices or nodes
lines are referred to as edges
The pattern of connections can be presented as a network
The structure of the network (pattern) will have an impact on its components.
: Internet- how the routes that the data take over the network
Social Network- how people learn
Some information could be attached to Network edges and vertices such as name and strength
Network Analysis Tools
tools that use some calculations to tell you something about the network. ex. Social Network Analysis (UCinet)
issue for discussing
The Web as a network
the concept directed
Centrality- degree centrality
in-degree and out- degree
small world effect