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[1710.07076] Core-periphery structure requires something else in the network
A network with core-periphery structure consists of core nodes that are densely interconnected. In contrast to community structure, which is a different meso-scale structure of networks, core nodes can be connected to peripheral nodes and peripheral nodes are not densely interconnected. Although core-periphery structure sounds reasonable, we argue that it is merely accounted for by heterogeneous degree distributions, if one partitions a network into a single core block and a single periphery block, which the famous Borgatti-Everett algorithm and many succeeding algorithms assume. In other words, there is a strong tendency that high-degree and low-degree nodes are judged to be core and peripheral nodes, respectively. To discuss core-periphery structure beyond the expectation of the node's degree (as described by the configuration model), we propose that one needs to assume at least one block of nodes apart from the focal core-periphery structure, such as a different core-periphery pair, community or nodes not belonging to any meso-scale structure. We propose a scalable algorithm to detect pairs of core and periphery in networks, controlling for the effect of the node's degree. We illustrate our algorithm using various empirical networks.
networks  code  network_data_analysis 
2 days ago by rvenkat
The crooked timber of humanity | 1843
"The world’s first national data network was constructed in France during the 1790s. It was a mechanical telegraph system, consisting of chains of towers, each of which had a system of movable wooden arms on top."
history  crime  security  hacking  dopost  networks 
3 days ago by niksilver
Graphentechnologien in den Digitalen Geisteswissenschaften
Dieses Studienbuch führt in Graphentechnologien mit einem geisteswissenschaften Fokus ein. Es handelt sich momentan um eine Arbeitsfassung, die noch weiter entwickelt, ggf. umstrukturiert und ausgebaut wird. Für Rückmeldungen, Verbesserungen und Hinweise bin ich dankbar.
books  germany  graphs  networks  open  access  xml 
7 days ago by kintopp
Twitter
Do you love cutting edge and ? Interested in and ? Want to reduce emissi…
energy  BigData  hardware  carbon  networks  from twitter_favs
10 days ago by freerange_inc
Large Graph Visualization | NASA Data Analytics Team
Wikipedia Map is a tool for visualizing topics by exploring the connections between Wikipedia pages.
graph-database  visualization  networks 
11 days ago by hschilling
Graph Commons – Map networks together
art project using data and mapping and diagramming to bring understanding to complex situations
art  mapping  drawing  networks  collaboration 
11 days ago by jeremiahmoore
Community managers delivering stellar ROI despite extensive burnout
Rachel Happe, who has led the Community Roundtable since 2009 kindly sent me a copy of the 2018 annual survey among community manager practitioners. (Download link.) While the survey respondents are self-selecting, the results are extraordinary and instructive.
communitymanagement  ROI  socialmedia  networks 
12 days ago by marshallk

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