Participants?
Last time: Extended game concepts
Added feature in the course pages: Every ? or ! suggests your reflection and links you to the wiki. Use it liberally.
The debate club is warmly recommended!

Why this topic on this course?

Please note the debate club!
• *Network  = core metaphor of the Internet
• *Network = core architecture of ICT
• *Bridges human and technologcal networks
• *Help understanding how ideas, data, software, viruses etc. spread =>Distributions
• *Help understanding how people behave and get networked => Design of virtual communities
*Give an explorative overivew to what kinds of approaches to networks exist.

Networks

The noncept of networks is used in many fields.
Network theories aim at generality, i,e. covering several.
• Advantages of network implementations
Robustness: Protection from failures and sensorship. like in neural networks, depending on architecture
How? The failure on one link can be compensated with another.

Technical perspective

• Networks of computers

Social perspective

• Human networks
In ICT and media technical and human networks are often interconnected!

Network topologies

Network topologies

by foobaz
• Foobaz
A network topology is the pattern of links connecting pairs of nodes (=knot) of a network.

Line topology

Can be broken by:
• * Community problem
• * Technical problem
Line

Bus topology

Bus
Robustness?

Ring topology

Ring
Robustness?
Examples of human rings?

Star topology

Star
• = hub-centered
Examples in organizations?
Advantages?
Disadvantages?

Hierarchy topology (tree)

• Army  model
Tree
eerT
Advantages? Disadvantages?

Fully connected

Fully connected
Examples?
Disadvantages?

Mesh & hybrid topologies

Mesh
At least two nodes with two or more paths between them (WP).
• Hybrids of the above
Modern vs. postmodern networks?

Neural network, brain

Neural network

What architecture is this?

Topology of the Internet

Topology of the internet

Assignment

• Network theory reading ring

Purposes

• * Go through a number of theories on the level of ideas
• * Leaves notes for later reference
• * Work collaboratively
• * Demonstrate ring topology in action

Rules

• * Each pair or team starts with studying its own theory from the given sources
* Find the most important point of the theory in question not yet mentioned and write it under the appropriate wiki subtitle. Browse both net & books.
* Move to next theory (if last go to first).

Sources

• IMKE library
• Theories on information systems (York University)
• Internet search

Wiki

The wiki was started with the intro course of fall '06. Current contributions can be built on top of this.

Next time