Pre-processing and analysis on the LAK Dataset http://www.solaresearch.org/resources/lak-dataset/
This was originally used on the 2012 dataset and blogged about here: http://blogs.cetis.org.uk/adam/2012/12/20/a-seasonal-sociogram-for-learning-analytics-research/
Much has changed in the data-set since then so that is no longer usable as-is.
I am now working on a new project which will be making some simple use of the LAK Dataset, LAEP - https://laepanalytics.wordpress.com
I don't have the time to rework the old stuff and the aims of LAEP are different so I've simply created a separate folder for LAEP. The scripts there are written to work with the RDF dump available September 2015.