the emergence of collective memories sungmin lee verónica ramenzoni petter holme
DESCRIPTION
THE EMERGENCE OF COLLECTIVE MEMORIES Sungmin Lee Verónica Ramenzoni Petter Holme. http://www.tp.umu.se/~holme/. (my collaborator) Fredrik Liljeros decided to come here. complex network boom of early 00’s. (my office mate) Martin Rosvall was invited. Narrative network / memory web. - PowerPoint PPT PresentationTRANSCRIPT
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THE EMERGENCE OF COLLECTIVE MEMORIES
Sungmin LeeVerónica RamenzoniPetter Holme
http://www.tp.umu.se/~holme/
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Petter@DPG
I became interested in a science career
discrete mathematics
(my collaborator) Fredrik Liljeros decided to come here
complex network boom of early 00’s
(my office mate) MartinRosvall was invited
Narrative network / memory web
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What is the topology of real narrative networks?How can we model the evolution of narrative networks / memory webs?How (much) can communication stabilize collective memories?What are the conditions for groups to form?How does the observations behave as a function of population size?
Outline
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Empirical memory webSource material
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
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Empirical memory webIndividual memory web 1
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
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Empirical memory webIndividual memory web 2
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
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Empirical memory webAggregate memory web
Bearman, Moody, Faris, 2003. “Networks and History” Complexity 8:61–71.
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Empirical memory webDegree distribution
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Empirical memory webCommunity structure
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N agents with individual memory webs connected by a coevolving social networkAgents can learn about history from experience or communication.Closer friends are more likely to communicate & people who communicate often are closer friends.
Events / associative arcs remembered more strongly are more frequently discussed, and vice versa.
Events / associative arcs not talked about are gradually forgotten.
Model ingredients
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Communication modelLearning dynamics
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Example outputMemory overlap, Jaccard index of associative arcs
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Model community structureNumber of groups
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Model community structureMemories and social ties
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15
Model community structureSize- & communication-rate scaling of the number of communities
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Model community structureSize-scaling of the diversity regime
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Model community structureSize-scaling of the number of groups
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Narrative networks represent memory webs.Network modeling can be helpful to understand these quantitatively.An empirical narrative network shows skewed (in- and out-) degree distribution.Propose a communication model that shows the emergence of collective memories… and the formation of communities with strong internal connections and similar memory websThe number of communities is limited as a function of N
Summary
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Petter
Vielen Dank!to all of you … from
Sungmin Verónica
http://www.tp.umu.se/~holme/
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Empirical memory webClustering coefficient vs. degree
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Empirical memory webDegree correlations
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Communication modelCommunity structure
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Communication modelErrors & misinterpretations
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Model community structureWhy a peak in g?
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Model community structureSize-scaling of the diversity regime