Hanneman, Robert A. and Mark Riddle. 2005. Introduction to social network methods. Riverside, CA: University of California, Riverside (published in digital form at http://faculty.ucr.edu/~hanneman/)
以下の二つの論文で扱われたデータセット。やはり、因子分析に向いたものとしてしましまさんから久保山さんにお薦めがありました。
-- M. Zanker, M.Jessenitschnig, D. Jannach and S. Gordea, Comparing Recommendation Strategies in a Commercial Context, IEEE Intelligent Systems, 2007, vol. 22, May/June.
-- M. Zanker, M.Jessenitschnig, Collaborative feature-combination recommender exploiting explicit and implicit user feedback, 11th IEEE Conference on Commerce and Enterprise Computing (CEC), Vienna, Austria, 2009.
LFやTwelfの流れを汲む証明系。証明木が見易いのが売りのようです。
[Types ML より] If you're planning to teach a programming language or logic foundations course and are thinking about using a proof assistant, you might consider SASyLF. SASyLF (Second-order Abstract Syntax Logical Framework) is an LF-based proof assistant that the same logical foundation and many of the same advantages as Twelf (in particular, variable binding is "built in"). However, it uses a syntax very close to that used for proofs on paper, giving the tool a much gentler learning curve--and much better error messages--than many alternatives.