DIAGNOSING VULNERABILITY, EMERGENT PHENOMENA, and VOLATILITY in MANMADE NETWORKS Synthesis of D1.3:...
Transcript of DIAGNOSING VULNERABILITY, EMERGENT PHENOMENA, and VOLATILITY in MANMADE NETWORKS Synthesis of D1.3:...
DIAGNOSING VULNERABILITY, EMERGENT PHENOMENA, and VOLATILITY in MANMADE NETWORKS
Synthesis of D1.3:Network analysis of interaction between consortium members
and MANMADE forum
Synthesis of D1.3:Network analysis of interaction between consortium members
and MANMADE forum
MANMADEMANMADE
COLB, Budapest 21-22 of January 2008
F. Bono, E. Gutierrez
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The ManMade network
The ManMade networkThe ManMade project is a network of researchers from different institutions participating in the project.
Network AnalysisThe ManMade project’s network is analyzed on the basis of the information retrieved from the project’s web forum.
Data sources for the analysis
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Forum
Startup category
Manmade Startup Forum
Original Manmade forum during project startup. All discussion in this forum is
now locked.
Manmade Forum
MANMADE General Topics
WP1 - Project Management
WP2 - Network Collation
WP3 - Mathematical Methods
WP4 - Electricity Networks
WP5 - Dynamics of supply-chain and market volatility of
networks
WP6- Vulnerability of interconnected networks
Possible social network data sourcesThe web Forum data source (topics ordered according to the project’s work package plan)
Forum activity
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The period considered starts from M1 to M11 (Jan-Nov 2007)
Rate of postings/messages is almost stable (~ 30 per month)
15 active users on the forum (10 inactive users)
Forum Users dataset
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(Private messages and topic posts)
77 Edges
(Registered users)
26 Nodes
Note: size of vertex indicative of traffic to/from a user.
Starting from the first posted message on a given topic, edges are created from the concatenated list of user postings
Combined graph of Users and Topics
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Private messages (user-to-user link).Posts on topics (user-to-topic link).
Edges
Registered users andTopics (Project’s items: tasks, milestones, deliverables).
114 Nodes
Topics activated by DM with no further messages (inactive)
Topics activated by DM with no further messages (inactive)
Isolated usersIsolated users
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Forum Users k-cores
In a social network, groups of individuals bonded with strong links, are indicative of cohesive subgroups that hypothetically interact in a more active way.
k-cores are indicators of cohesiveness within a social network.
Note: the k-core analysis does not consider the number of interactions between users……
Institutional exchanges (posts and messages)
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• Two nodes (QMUL and JRC) have a more intense information flow.
• The other institutions privilege exchanges with the two main nodes, with minor exchanges between them.
…however the weighted k-core interactions between institutions indicate that:
Users and Topics k-cores
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The main k-core is composed of individuals only.
The highest ranked topic is T1.4 (meetings).
Most topics are on the periphery indicating that interaction of these topics amongst users has yet to start.
Users and Topics cliques
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Node size is proportional to the number of exchanged messages
Cliques are found by extracting overlapping triads.
Cliques reveal the overall cohesive structure.
Network evolution
The Forum’s network evolves as people post messages
M1-M11 users exchanged postsM1-M11 users
exchanged posts