iris (1978-2006) historical reflection through visual analysis co-authors: judith molka-danielsen...
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IRIS (1978-2006)
Historical Reflection through Visual Analysis Co-authors:
Judith Molka-Danielsen (Molde University College, Norway)Matthias Trier (Technical University of Berlin, Germany)Vadim Shlyk (Technical University of Berlin, Germany)Annette Bobrik (Technical University of Berlin, Germany)Markku I. Nurminen (Turku University, Finland)
IRIS (Information Systems Research in Scandinavia) Conference is an annual meeting for researchers in Scandinavia. A social network of co-authorships and general research collaboration has emerged.
The complete IRIS 1978-2006 author and co-author relationship network.
Goals of the analysis: – aggregate global network
measures – dynamically visualize the co-
authorship network development over selected time periods
– identify and visualize the most prominent actors over time and their ego-networks
– capture the nature and characteristic of the research topics over time through visualizing the network of keywords found in the conference paper titles.
Top Paper Count: Subset of 256 actors with a minimum of three contributed papers.
Ole HansethKarl Heinz Kautz
Carsten SørensenLars Mathiassen
Markku Nurminen
Lars Svensson
Kristin Braa
Pertti Järvinen
Peter Axel Nielsen
Per Flensburg
AuthorPaper count
Mathiassen 29
Nurminen 23
Järvinen 22
Sørensen 21
Flensburg 19
Kautz 19
Nielsen 17
Svensson 17
Nuldén 15
Hanseth 15
Urban Nuldén
Top Co-author count
Ole HansethKarl Heinz Kautz
Carsten SørensenLars Mathiassen
Markku Nurminen
Lars Svensson
Per Flensburg
Author
Co-author Count
Nurminen 36
Mathiassen 25
Svensson 20
Sørensen 20
Hanseth 19
Kautz 18
Savolainen 17
Goldkuhl 15
Jakobsson 16
Flensburg 16
Göran Goldkuhl
Matti JakobssonVesa Savolainen
Betweenness Centrality – creators of small worlds
Ole HansethKarl Heinz Kautz
Carsten SørensenLars Mathiassen
Markku Nurminen
Lars Svensson
Kristin Braa
Author
Between-ness
Centrality
Nurminen 31.29%
Braa 23.32%
Hanseth 18.46%
Kautz 17.54%
Sørensen 16.69%
Mathiassen 15.63%
Greenbaum 15.09%
Svensson 14.15%
Heikkilä 10.16%
Holmström 8.46%
Jukka Heikkilä
Jonny Holmström
Joan Greenbaum
Who works together?
The 256 most active authors are colored due to the country they come from:
light blue: Finlandblue: Norway yellow: Swedenred: Denmark green: non-Scandinavian
All authors from one Country
Total paper count
Sweden 574
Finland 424
Denmark 232
Norway 194
Time in Reverse: degrees of separation in time
2007 Papers are shown in color
Video of the forward evolving network.
Combined ego-network among the top 5 active authors: includes 84 authors in 198 relationships. The lighter nodes represents those top 5 central persons. Interestingly, only two of the top6-top10 active actors are found in direct relationship to the top5. The rest are positioned in different sectors of the network meaning that several independent collaborations arise. 12-Markku Nurminen
4- Pertti Järvinen
30-Per Flensburg
58-Lars Mathiassen
160-Carsten Sørensen
Active Period Author
Paper Count
83-04 L. Mathiassen 29
78-02 M. I. Nurminen 23
78-06 P. Järvinen 22
89-03 C. Sørensen 21
81-06 P. Flensburg 19
90-05 K. H. Kautz 19
86-05 P. A. Nielsen 17
97-06 L.Svensson 17
94-06 U. Nuldén 15
91-06 O. Hanseth 15
Ego-network among the top 5 central authors first vs. last years. Node 12 was central in 1st period. Node 58 in 2nd. Node 160 was in a very small peripheral component, but was very central position starting in 1993. Node 343 is the most connected node in 4th period had a first co-authorship link in 1997. There are obvious lifecycles of activity. Although three out of the top five authors have never collaborated directly, their respective groups of co-authors remain very separated.
12-Markku Nurminen4- Pertti Järvinen
30-Per Flensburg
58-Lars Mathiassen160-Carsten Sørensen 160
58
124
30
343-Lars Svensson
Line Charts of keyword occurrence (%) (trends) across time: decreases noticeably over time. This highlights reduced coverage of the selected top twenty and indicates increased pluralism and heterogeneity: The few initial topics differentiate.
•Co-authors, who employed the term information (1978-2006) in their papers, indicating the spread of these terms over time. •Co-authors, who employed the term knowledge (1985-2006) in their papers, indicating the spread of these terms over time.