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dc.contributor.author
Sun, Lijun
dc.contributor.author
Axhausen, Kay W.
dc.contributor.author
Lee, Der-Horng
dc.contributor.author
Huang, Xianfeng
dc.date.accessioned
2017-06-19T15:31:03Z
dc.date.available
2017-06-19T15:31:03Z
dc.date.issued
2013-01-25
dc.identifier.other
10.1073/pnas.1306440110
dc.identifier.uri
http://hdl.handle.net/20.500.11850/163720
dc.description.abstract
Understanding of the mechanisms driving our daily face-to-face encounters is still limited; the field lacks large-scale datasets describing both individual behaviors and their collective interactions. However, here, with the help of travel smart card data, we uncover such encounter mechanisms and structures by constructing a time-resolved in-vehicle social encounter network on public buses in a city (about 5 million residents). This is the first time that such a large network of encounters has been identified and analyzed. Using a population scale dataset, we find physical encounters display reproducible temporal patterns, indicating that repeated encounters are regular and identical. On an individual scale, we find that collective regularities dominate distinct encounters' bounded nature. An individual's encounter capability is rooted in his/her daily behavioral regularity, explaining the emergence of "familiar strangers" in daily life. Strikingly, we find individuals with repeated encounters are not grouped into small communities, but become strongly connected over time, resulting in a large, but imperceptible, small-world contact network or "structure of co-presence" across the whole metropolitan area. Revealing the encounter pattern and identifying this large-scale contact network are crucial to understanding the dynamics in patterns of social acquaintances, collective human behaviors, and -- particularly -- disclosing the impact of human behavior on various diffusion/spreading processes.
dc.language.iso
en
dc.title
Understanding Metropolitan Collective Encounter Patterns
dc.type
Report
ethz.pages.start
arXiv:1301.5979
ethz.size
7p.
ethz.notes
Submitted on 25 January 2013.
ethz.publication.place
Array
ethz.publication.status
published
ethz.date.deposited
2017-06-19T15:32:32Z
ethz.source
ECIT
ethz.identifier.importid
imp59365159e03a751431
ethz.ecitpid
pub:120980
ethz.eth
yes
ethz.availability
Metadata only
ethz.rosetta.installDate
2017-07-26T21:40:41Z
ethz.rosetta.lastUpdated
2017-12-22T01:13:49Z
ethz.rosetta.versionExported
true
ethz.COinS
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