dimitris kalamaras

mathematics, social network analysis, free software…

Category: Science (Page 2 of 5)

Network analysis of national soccer teams in FIFA World Cup 2014

This is the abstract of a paper published in the International Journal of Performance Analysis in Sport (Vol.15, No.1). In the paper we analyzed the network characteristics of successful and unsuccessful national teams that participated in FIFA World Cup 2014.

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The new features in versions 1.3 and 1.4 of SocNetV

Over the last weeks, the Social Networks Visualizer (SocNetV) project has released two new versions which brought useful new features and of course a lot of bugfixes. The latest v1.4 closed even 4 years old bugs!



The strongest new feature of SocNetV is multirelational editing. You can now load or create a social network on the canvas, for instance depicting the friendship ties between kids in a classroom, and then add a new relation (Cltr+Shift+N) which it might depict i.e. “likes” between pairs of the same clasroom kids. And you can be do this very easily as we will demonstrate in this article.

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SocNetV version 1.2 released with lots of goodies!

A new version of SocNetV, the cross-platform tool for social network analysis and visualization, has been released. Version 1.2 brings a major GUI overhaul, a new conceptualization of “prominence” measures, new importance and reachability measures, many new visualization layouts based on the new indices, and fixes a slew of bugs (see below).

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Magnified reality

Here’s a series of 31 images taken with a Dino-Lite digital microscope. I won’t go in details about the original source of the images, since most of them are pretty obvious (i guess).
Some of them are of poor quality, due to trembling hand or low resolution of Kamoso (KDE’s picture retriever). Anyway, have fun…

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SocNetV 1.0 Qt5 is out! RPMs included :)

If you’re interested in Social Networks Analysis and Visualization (I’m not talking about FB/Twitter here!), check out our latest and greatest release of SocNetV, version 1.0.

SocNetV (Social Networks Visualizer) is now based on Qt5/C++ framework and has new great features, such as PageRank network analysis and, of course, layouts. At the moment, there is only source code and Fedora/openSUSE packages available from our project page in SourceForge. Soon, Debian/Ubuntu packages will be released as well. Warning: There are SocNetV packages in the official Debian/Ubuntu repositories, but it’s a very old version. Maybe a brave debian developer (serzan?) could fix this soon 🙂

Needless to say: SocNetV is a GPL3 application. It is free software (free as in freedom). You can copy it, modify it and redistribute it as long as any derivative work remains free software. Enjoy.

Technical documentation for SocNetV

After over a year of project inactivity I’m happy to announce that SocNetV now includes technical documentation for both users and developers. Vaggelis Motesnitsalis, undergraduate in the Computer Science Department of
Aristotle University of Thessaloniki, was kind enough to prepare and contribute a complete Software
Requirements Specification
(SRS, see Wikipedia) document in PDF format for Social Network Visualizer.

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SocNetV on Maemo-N900?

Easy. Short of.

I did this ‘experiment’ to test how much cross-platform Qt really is. I wanted to see if SocNetV can run on Maemo with no modifications whatsoever. These are the steps I followed:

1. Downloaded and installed the Xephyr X11 server (this is a small X11 server that runs inside ‘normal’ X and provides a virtual device screen where you see all the Maemo applications running):

sudo apt-get install xserver-xephyr

2. Downloaded and installed  Scratchbox and  Maemo SDK  in my laptop (Kubuntu x86/lucid).  I followed the straightforward instructions from the Maemo wiki and especially “Installing Maemo 5 SDK on x86-32 Debian based distribution“. It’s only seven steps and circa 100MBs of total downloads…

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