Welcome

I'm a PhD student in the Neural Information Processing Group of Prof. Dr. Klaus Obermayer of the Electrical Engineering and Computer Science Faculty of the Technical University Berlin. Since 11/2007, I'm a recipient of a scholarship of the Integrated Graduate Program Human-Centric Communication.

In my PhD thesis, I focus on the formal properties of k-partite k-uniform hypergraphs (tuples combining objects from k different sets) and their application on social annotations, e.g., social tagging datasets, where k=3 (documents, users, and tags/terms). The main goal is to generalize concepts from graph theory and complex network analysis to these structures. In particular, I'm trying to find out if processing them in their native representation can yield real advantages (if theoretical beauty doesn't count as "real") compared to approaches dealing with "flattened" versions of the data. Our work on generalized ("hyperincident") connected components and their application to social bookmarking spam was awarded the ACM SIGWEB's Douglas Engelbart Best Paper Award at HyperText 2009. Currently, I work on generalizations of modularity optimization for community detection.

Contact

Feel free to contact me, particularly if you're interested in some part of my work, or if you're a student of the TUB - I am happy to supervise all kinds of student projects related to the topics presented here, mainly a mix of machine learning, interacting with the web, and network analysis. Previous or ongoing projects advised by me have included student projects or diploma theses on recommender systems for movies or, in another thesis, locations in Second Life, AJAX-based interfaces for relevance feedback, content-based tag prediction for HTML pages, learning to play Tringo, or combining content-based and collaborative tag recommendation for a large image database.

Nicolas Neubauer, M.Sc.

TU Berlin, Neural Information Processing Group
neubauer(AT)cs.tu-berlin.de
http://ni.cs.tu-berlin.de/~neubauer

+49 30 314-25542
Franklinstr. 28/29
FR 2526 (FR 2-1)
10587 Berlin
Germany

The other Nicolas Neubauer

If this sounds kind of familiar, but not quite what you were searching for, you may actually be looking for the other Nicolas Neubauer who studies in Osnabrück (as I have) and does computer sciency things as well.

Publications

2010

N. Neubauer and K. Obermayer: Community Detection in Tagging-Induced Hypergraphs. Workshop on Information in Networks, 2010 [pdf]

D. Pannicke, M. Hahne, N. Neubauer, B. Ochab, R. Lieb, M. Meister, W. Rammert, K. Obermayer and R. Zarnekow: Akzeptanzfähigkeit von Tagging-Systemen in benutzergenerierten virtuellen Welten. Multikonferenz Wirtschaftsinformatik 2010

2009

N. Neubauer and K. Obermayer: Towards Community Detection in k-Partite, k-Uniform Hypergraphs. Workshop on Analyzing Networks and Learning with Graphs at NIPS 2009 [pdf]

N. Neubauer and K. Obermayer: Connected Components of 3-Partite 3-Uniform Hypergraphs. Poster at The Learning Workshop 2009. [pdf abstract]

N. Neubauer, R. Wetzker and K. Obermayer: Tag Spam Creates Large Non-Giant Connected Components. Fifth International Workshop on Adversarial Information Retrieval on the Web (AIRWeb) at the World Wide Web Conference 2009. [pdf]

N. Neubauer and K. Obermayer: Hyperincident Connected Components in Tagging Networks. In Proceedings of the 20th ACM Conference on Hypertext and Hypermedia (Torino, Italy, June 29 - July 01, 2009). HT '09. ACM, New York, NY, 229-238. [pdf]

2008

N. Neubauer and K. Obermayer: Predicting Tag Spam Examining Cooccurrences, Network Structures and URL Components. Wikis, Blogs, Bookmarking Tools - Mining the Web 2.0 Workshop at ECML/PKDD 2008 [pdf]

B. Ochab, N. Neubauer and K. Obermayer: Personalized Recommendations for the Web 3D. In: J. Kay, P. Pu, W. Nejdl and E. Herder (eds.): Adaptive Hypermedia and Adaptive Web-Based Systems - Fifth International Conference, AH 2008

2007

N. Neubauer, C. Scheel, S. Albayrak, K. Obermayer: Distance Measures in Query Space: How Strongly to Use Feedback from Past Queries. Proceedings of the IEEE/WIC/ACM Web Intelligence 2007

C. Scheel, N. Neubauer, A. Lommatzsch, K. Obermayer, S. Albayrak: Efficient Query Delegation by Detecting Redundant Retrieval Strategies. SIGIR 2007 Workshop: Learning to Rank for Information Retrieval [pdf]

2006

N. Neubauer: Recursive SOMs and Automata (Master's Thesis) Publications of the Institute of Cognitive Science, University of Osnabrück, Volume 11-2006 [pdf]

B. Hammer and N. Neubauer: On the capacity of unsupervised recursive neural networks for symbol processing , Second International Workshop on Neural-Symbolic Learning and Reasoning (NeSy '06) [slides]

2005

B.Hammer, A.Micheli, N.Neubauer, A.Sperduti, M.Strickert: Self Organizing Maps for Time Series Proceedings of WSOM 2005, Paris, France, 115-122

S. Nagel and N. Neubauer: A Framework to Systematize Positions in Neuroethics, Essays in Philosophy, Vol 6, No 1, The Philosophy of Technology, edited by Peter Denton [html]

S. Nagel and N. Neubauer: A Framework to Systematize Positions in Neuroethics, presented at 'Neurophilosophy: The State of the Art', 05/2005

Friedrich Albert, Jaqueline Griego, Stanley James, Christiane Kabisch, Oleksandr Kolomiyets, Ute Kreitz, Jens Kunkemöller, Jiayong Liu, Christian Mühl, Saskia Nagel, Nicolas Neubauer and Frank Schumann: MINI: Mechanisms In Neuropsychological Issues. Publications of the Institute of Cognitive Science, University of Osnabrück, Volume 9-2005 [pdf]

L. Steels, J. De Beule and N. Neubauer: Linking in Fluid Construction Grammars. Proceedings of BNAIC. Transactions of the Belgian Royal Society of Arts and Sciences., pages 11-18, Brussels, 2005.

2004

N. Neubauer and L. Steels: Emergent Compositionality in Language Evolution through Negotiation, presented at Evolang V, 2004. [pdf abstract]

N. Neubauer: Emergence in a Multiagent Simulation of Communicative Behaviour. (Bachelor's Thesis), Publications of the Institute of Cognitive Science, University of Osnabrück, Volume 11-2004 [pdf]

L. Steels, J. De Beule, N. Neubauer and J. Van Looveren: Fluid Construction Grammars, Proceedings of the International Conference on Construction Grammars, 2004