title: Extraction of multilayered social networks from activity data.
abstract: The data gathered in all kinds of web-based systems, which enable users to interact with each other, provides an opportunity to extract social networks that consist of people and relationships between them. The emerging structures are very complex due to the number and type of discovered connections. In web-based systems, the characteristic element of each interaction between users is that there is always an object that serves as a communication medium. This can be, for example, an e-mail sent from one user to another or post at the forum authored by one user and commented on by others. Based on these objects and activities that users perform towards them, different kinds of relationships can be identified and extracted. Additional challenge arises from the fact that hierarchies can exist between objects; for example, a forum consists of one or more groups of topics, and each of them contains topics that finally include posts. In this paper, we propose a new method for creation of multilayered social network based on the data about users activities towards different types of objects between which the hierarchy exists. Due to the flattening, preprocessing procedure of new layers and new relationships in the multilayered social network can be identified and analysed.
authors.affiliation: School of Natural and Mathematical Sciences, Department of Informatics, King's College London, London WC2R 2LS, UK.
authors.forename: Katarzyna
authors.identifier: 0000-0003-2309-1315
authors.initials: K
authors.lastname: Musial
authors.affiliation: Institute of Informatics, Wrocław University of Technology, Wyb. Wyspiánskiego 27, 50-370 Wrocław, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Bródka
authors.affiliation: Institute of Informatics, Wrocław University of Technology, Wyb. Wyspiánskiego 27, 50-370 Wrocław, Poland.
authors.forename: Przemysław
authors.initials: P
authors.lastname: Kazienko
authors.affiliation: Research & Engineering Center Sp. z o.o., Ulica Strzegomska 46B, 53-611 Wrocław, Poland.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Gaworecki
mesh_terms: D006801:Humans; D020407:Internet; D060756:Social Networking; D012944:Social Support
references.citation: Nature. 1998 Jun 4;393(6684):440-2
references.pmid: 9623998
references.citation: Phys Rev Lett. 2013 Jan 11;110(2):028701
references.pmid: 23383947
references.citation: Proc Natl Acad Sci U S A. 2002 Jun 11;99(12):7821-6
references.pmid: 12060727
references.citation: Phys Rev Lett. 2006 Oct 27;97(17):178102
references.pmid: 17155510
references.citation: Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Sep;74(3 Pt 2):036116
references.pmid: 17025717
references.citation: Nature. 2001 Mar 8;410(6825):268-76
references.pmid: 11258382