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http://bura.brunel.ac.uk/handle/2438/4256
Title: | Growing trees in Internet news groups and forums |
Authors: | Kujawski, B Holyst, JA Rodgers, GJ |
Keywords: | Internet News Group |
Issue Date: | 2007 |
Abstract: | We present an empirical study of the networks created by users within internet news groups and forums and show that they organ- ise themselves into scale-free trees. The structure of these trees depends on the topic under discussion; specialist topics have trees with a short shallow structure whereas more universal topics are discussed widely and have a deeper tree structure. For news groups we find that the distribu- tion of the time intervals between when a message is posted and when it receives a response exhibits a composite power-law behaviour. From our statistics we can see if the news group or forum is free or is overseen by a moderator. The correlation function of activity, the number of messages posted in a given time, shows long range correlations connected with the users’ daily routines. The distribution of distances between each message and its root is exponential for most news groups and power-law for the fo- rums. For both formats we find that the relation between the supremacy ( the total number of nodes that are under the node i, including node i) and the degree is linear s(k) k, in contrast to the analytical relation for Barab´asi-Albert network. |
URI: | http://bura.brunel.ac.uk/handle/2438/4256 |
Appears in Collections: | Mathematical Physics Dept of Mathematics Research Papers Mathematical Sciences |
Files in This Item:
File | Description | Size | Format | |
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Preprint.pdf | 633.22 kB | Adobe PDF | View/Open |
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