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NOTE : As of November 2008, I am working as management consultant for BCG, the Boston Consulting Group, in Munich.
Before that, I have been with Siemens AG, Corporate Research & Technologies, for 3 years, as a technical consultant and project manager. This site is still maintained, though (last update: Nov 04, 2008).
About Me
I enrolled in Computer Science at the University of Passau,
Germany, in October 1998, with minor Applied Languages.
From September 2001 to May 2002, during my graduate studies, I spent two semesters
at Université Laval, Québec,
Canada, eventually returning to Germany and
obtaining my diploma (Dipl.-Inf.) in March 2003. Three months later, I joined the Databases and
Information Systems group (DBIS)
in Freiburg, headed by Prof. Dr. Georg Lausen,
as Ph.D. student and teaching assistant.
From September to October 2004, I conducted research
at GroupLens Research,
University of Minnesota, MN, USA, working with
Professor Joseph A. Konstan and
Sean M. McNee on advanced
algorithms for recommender systems.
There is an electronic version available of
a newspaper article that
appeared in the Minnesota Daily
reporting on my research project conducted at GroupLens.
On June 13, 2005, I defended my Ph.D. thesis entitled Towards Decentralized Recommender Systems,
having Georg Lausen, Joseph A. Konstan, Lars Schmidt-Thieme and Günter Müller served on my committee.
A complete CV (German only) can be downloaded here (update Nov 05, 2008).
NEW : Collaborative filtering dataset for book ratings released!
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Publications
2008
Tracking Topic Evolution in News Environments;
Maximilian Viermetz, Michal Skubacz, Cai-Nicolas Ziegler, Dietmar Seipel; Proceedings of the 2008 IEEE Conference on Enterprise Computing, E-Commerce, and E-Services (EEE '08),
July 22-24, 2008, Washington, DC, USA.
2007
2006
2005
Towards Decentralized Recommender Systems;
Cai-Nicolas Ziegler; Ph.D. thesis, Albert-Ludwigs-Universität Freiburg, 2005; Freiburg i.Br., Germany.
2004
Taxonomy-driven Computation of Product Recommendations;
Cai-Nicolas Ziegler, Georg Lausen, Lars Schmidt-Thieme; Proceedings of the 2004 ACM International Conference on Information and Knowledge Management (CIKM '04),
November 8-13, 2004, Washington, D.C., USA (acceptance rate: 19%, 59/303).
Semantic Web Recommender Systems;
Cai-Nicolas Ziegler; EDBT 2004 Workshops (PhD, DataX, PIM, P2P&DB, and ClustWeb). Selected and Revised Papers,
March 14-18, 2004, Heraklion, Greece. LNCS 3268.
Semantic Web Recommender Systems;
Cai-Nicolas Ziegler; Proceedings of the Joint ICDE/EDBT Ph.D. Workshop 2004,
March 14-18, 2004, Heraklion, Greece (acceptance rate: 24.4%, 21/86).
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... my Erdös number is 5
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Talks
Crafting Decentralized Recommender Systems;
Cai-Nicolas Ziegler; Talk given at the Department of Databases and Artificial Intelligence (DBAI), Technical University of Vienna (TU Wien),
1st July, 2004, Vienna, Austria.
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Awards
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Supervised Diploma/Master's Thesis Projects
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Miscellaneous Stuff
I served as a member of the program commitee
for EEE '05, Hong Kong,
China, SAC '05 (TRECK), Santa Fe,
NM, USA, ICWI '05, Lisbon, Portugal,
SAC '06 (TRECK), Dijon,
France, ECAI '06 Workshop on Recommender Systems,
Riva del Garda, Italy, AAAI '06 Workshop on Intelligent Techniques for Web Personalization ( ITWP), Boston, MA, USA,
ECAI '08 Workshop on Recommender Systems,
Patras, Greece, and SAC '08 (TRECK), Fortaleza, Brazil.
I also served as reviewer for IEEE's Transactions on Knowledge and Data Engineering ( TKDE), for AICom, the
European Journal on Artificial Intelligence, and for Elsevier's Artificial Intelligence journal.
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