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Barry Wellman
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S.D. Clark Professor of Sociology, FRSC NetLab Director
Department of Sociology 725 Spadina Avenue, Room 388
University of Toronto Toronto Canada M5S 2J4 twitter:barrywellman
http://www.chass.utoronto.ca/~wellman fax:+1-416-978-3963
Updating history: http://chass.utoronto.ca/oldnew/cybertimes.php
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Particle Swarm Optimization , Swarm Intelligence
Abstract Excerpt: The Particle Swarm Optimizer (PSO), one of the pillars
of Swarm Intelligence, is a remarkable algorithm for at least two reasons:
(a) it has a very simple formulation which makes it easy to implement,
apply, extend and hybridize, and (b) it is a constant source of complex
and emergent phenomena, which are at the essence of swarm intelligence.
Many people around the world are exploring PSOs and their applications.
* [14] Editorial for the special issue on Particle Swarm Optimization,
Riccardo Poli, Andries Engelbrecht, Jim Kennedy, 2009/12, DOI:
10.1007/s11721-009-0033-9, Swarm Intelligence Volume 3, Number 4, Pages
243-244 [14] http://dx.doi.org/10.1007/s11721-009-0033-9
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10. Quantifying structure in networks , Eur. Phys. J. B
Abstract: We investigate exponential families of random graph
distributions as a framework for systematic quantification of structure in
networks. In this paper we restrict ourselves to undirected unlabeled
graphs. For these graphs, the counts of subgraphs with no more than k
links are a sufficient statistics for the exponential families of graphs
with interactions between at most k links. In this framework we
investigate the dependencies between several observables commonly used to
quantify structure in networks, such as the degree distribution, cluster
and assortativity coefficients.
* [15] Quantifying structure in networks, E. Olbrich, T. Kahle, N.
Bertschinger, N. Ay, J. Jost, 2010/07/02, DOI: 10.1140/epjb/e2010-00209-0,
Eur. Phys. J. B
[15] http://dx.doi.org/10.1140/epjb/e2010-00209-0
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Information explosion on complex networks and control , Eur. Phys. J. B
Abstract: When a piece of information spreads on a complex network, error
or distortion can occur. For a high error probability, the phenomenon of
information explosion can occur where the number of distinct pieces of
information on the network increases continuously with time. We construct
a physical model to address this phenomenon. The transition to information
explosion as the error probability increases through a critical value is
uncovered and elucidated, and a control strategy is articulated to
maximize the robustness of the network against information explosion,
which is validated by both numerical computations and a mean-field based
analysis.
* [19] Information explosion on complex networks and control, X. J. Ma,
W.-X. Wang, Y.-C. Lai, Z. Zheng, 2010/07/02, DOI:
10.1140/epjb/e2010-00208-1, Eur. Phys. J. B
[19] http://dx.doi.org/10.1140/epjb/e2010-00208-1
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15. Frontiers of Collaboration: The Evolution of Social Networking ,
Knowledge@Wharton
Summary: Social networking tools such as Twitter and the emerging Google
Wave web application are taking businesses to the frontiers of real-time
communication and collaboration. The technology has the potential to make
it easier to discover and share information and interact with others. But
the key word is "potential." During a panel at the last Supernova
technology strategy conference, experts talked about what makes the
current crop of services more promising than those that came before, and
the obstacles to further progress.
* [20] Frontiers of Collaboration: The Evolution of Social Networking,
2010/07/07, Knowledge@Wharton
[20] http://knowledge.wharton.upenn.edu/article.cfm?articleid=2536
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Invasion and expansion of cooperators in lattice populations: Prisoner's
dilemma vs. Snowdrift games , Journal of Theoretical Biology
Excerpt: Spatial structure with limited local interactions has long been
identified as a potent promoter of cooperation in the prisoner's dilemma
but in the spatial snowdrift game, space may actually enhance or inhibit
cooperation. Here we investigate and link the microscopic interaction
between individuals to the characteristics of the emerging macroscopic
patterns generated by the spatial invasion process of cooperators in a
world of defectors.
* [22] Invasion and expansion of cooperators in lattice populations:
Prisoner's dilemma vs. Snowdrift games, Fu F , Nowak MA , Hauert C, July
2010, DOI: 10.1016/j.jtbi.2010.06.042, Journal of Theoretical Biology, in
Press * Contributed by [23] Segismundo
[22] http://dx.doi.org/10.1016/j.jtbi.2010.06.042
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Analyzing Social Media Networks with NodeXL: Insights from a Connected
World , Morgan Kaufmann
Summary: Businesses, entrepreneurs, individuals, and government agencies
alike are looking to social network analysis (SNA) tools for insight into
trends, connections, and fluctuations in social media. Microsoft's NodeXL
is a free, open-source SNA plug-in for use with Excel. It provides instant
graphical representation of relationships of complex networked data. But
it goes further than other SNA tools -- NodeXL was developed by a
multidisciplinary team of experts that bring together information studies,
computer science, sociology, human-computer interaction, and over 20 years
of visual analytic theory and information visualization into a simple tool
anyone can use.
* [27] Analyzing Social Media Networks with NodeXL: Insights from a
Connected World, Derek Hansen, Ben Shneiderman, Marc A. Smith, 2010/09/01,
Morgan Kaufmann * Contributed by [28] Anton Joha
[27]
http://www.amazon.com/dp/0123822297?tag=compldiges-20&camp=0&creative=0&linkCod
e=as1&creativeASIN=0123822297&adid=1BCTM2HB716QAH1FZRDV&
[28] mailto:[log in to unmask]
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