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*****  To join INSNA, visit http://www.insna.org  *****

Dear Gohar Feroz Kahn, 

 

You may also take a look at http://www.leydesdorff.net/visone for a version
of visone that we (Thomas Schank and I) constructed for this purpose. The
version reads dynamic .paj-files.

 

Loet Leydesdorff, Thomas Schank, Andrea Scharnhorst, & Wouter De Nooy,
Animating the development of
<http://www.leydesdorff.net/socnetw/paper/index.htm> Social Networks over
time using a dynamic extension of multidimensional scaling. El Profesional
de la Información 17(6) (2008) 611-626.
http://www.elprofesionaldelainformacion.com/contenidos/2008/noviembre/04.pdf


 

The paper contains also a dynamic co-author network (of Social Networks).

 

Best,

Loet

 

  _____  

Loet Leydesdorff 

Professor, University of Amsterdam
Amsterdam School of Communications Research (ASCoR)

Kloveniersburgwal 48, 1012 CX Amsterdam
 <mailto:[log in to unmask]> [log in to unmask] ;
<http://www.leydesdorff.net/> http://www.leydesdorff.net/ 
Honorary Professor, SPRU,  <http://www.sussex.ac.uk/spru/> University of
Sussex; Visiting Professor, ISTIC,
<http://www.istic.ac.cn/Eng/brief_en.html> Beijing;
http://scholar.google.com/citations?user=ych9gNYAAAAJ
<http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en> &hl=en  

 

From: Social Networks Discussion Forum [mailto:[log in to unmask]] On
Behalf Of G.F.Khan
Sent: Thursday, September 19, 2013 11:26 AM
To: [log in to unmask]
Subject: Longitudinal co-authorship network analysis-response summery

 

***** To join INSNA, visit http://www.insna.org ***** 

Dear Group Members,

Once again thank you for your inputs. Below I summarized the responses.

What to look for when investigating longitudinal co-authorship networks?

One may look for or use:

·        "partitions to slice and dice the data and track changes over
time.” (suggested by Dr. John McCreery)—more details can be found here:
http://www.slideshare.net/jlmccreery

·         “Betweenness centralization, Fragmentation coefficient, Triad
count or simmellian ties, changes in reciprocal ties as both a percentage
and total amount (for directed networks), and specialization and cognitive
demand (for meta networks—more than just people to people network).”
(suggested Dr. Ian McCulloh)

·        "the latent dimensions of the vector space using factor analysis of
the (asymmetrical) documents/authors matrix or community finding algorithms
in the coauthor matrices (Blondel).” (suggested by Prof. Loet Leydesdorff)

·        “how, over time, the network develops -- includes people from
various universities/countries/sub-disciplines... maybe measure
increasing/decreasing diversity/homophily over time?” (suggested  by Dr.
Valdis Krebs)

·        One can also include measures, such as citation received, number of
new players added (e.g., authors, countries, and institutions), structure
holes, and new knowledge created (e.g., emerging themes and topics) (this is
my opinion).

·        However, in a off list discussion with Prof. Barry, we tend to
agree that the question of effective-efficient co-authorship network needs
to be discussed further. What an effective-efficient co-authorship network
means?

How to slice and dice the network?

From the responses it seem that you can slice and dice data the way you
like. It can be year by year, every four year, every five year, or every 10
years (it may depend on your research settings).  

Resources/studies suggested

Howard D. White, Nancy Nazer, and Barry Wellman (2004) "Does Citation
Reflect Social Structure? Longitudinal Evidence from the 'Globenet'
Interdisciplinary Reserach Group", [Journal of the American Society for
Information Science and Technology 55, 2 (January 2004): 111-26.]
http://homes.chass.utoronto.ca/~wellman/publications/citation/jasist_55(2)_p
p111-126.pdf

Loet Leydesdorff, Robert L. Goldstone, Interdisciplinarity at the Journal
and Specialty Level: The changing knowledge bases of the journal Cognitive
Science. Link:  <http://arxiv.org/abs/1212.0823>
http://arxiv.org/abs/1212.0823

Trier, M. & Molka-Danielsen, J. (2013). Sympathy or strategy: social capital
drivers for collaborative contributions to the IS community. European
Journal of Information Systems, 22(3), 317-335. Link:
http://dx.doi.org/10.1057/ejis.2012.27

A comparison of time periods and a related video of the dynamic evolution of
the network: http://www.commetrix.net/irisnetwork

SNA tool Commetrix: commetrix.net

 

Regards,

-- 

Khan, Gohar Feroz (PhD)
Assistant Professor
Korea University of Technology & Education (KoreaTECH)
1600 Chungjol-ro Byungcheon-myun
Cheonan city, 330-708, South Korea
Office: 82-41-560-1415; Mobile: +82-10-5510-8071
email: [log in to unmask] 
-------------------------------------------------------

Director Center for Social Technologies
Associate Editor Journal of Contemporary Eastern Asia 
I blog here

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