Phone, Fax, Email:

phone:	+49 5121 / 883-851
fax:	+49 5121 / 883-859
e-mail:

Publications:
Books:

• Lawrence Bergman, Alex Tuzhilin, Robin Burke, Alexander Felfernig, Lars Schmidt-Thieme (eds., 2009):
  RecSys '09: Proceedings of the Third ACM Conference on Recommender Systems, New York, NY, USA, ACM.
• Christine Preisach, Hans Burkhardt, Lars Schmidt-Thieme, Reinhold Decker (eds., 2008):
  Data Analysis, Machine Learning and Applications, Springer.
• Daniel Baier, Reinhold Decker, Lars Schmidt-Thieme (eds., 2005):
  Data Analysis and Decision Support, Springer.
• Lars Schmidt-Thieme (2003):
  Assoziationsregel-Algorithmen für Daten mit komplexer Struktur - mit Anwendungen im Web Mining, Frankfurt am Main.
• Martin Schader, Lars Schmidt-Thieme (2003):
  Java, Eine Einführung, Springer, 4th edition.
• Lars Schmidt-Thieme (2000):
  Die Gestaltung von Exposition und Reprise in den Streichquartetten Haydns, Frankfurt am Main.

• Alexander Felfernig, Gerhard Friedrich, Lars Schmidt-Thieme (guest eds., 2007):
  IEEE Intelligent Systems Special Issue on Recommender Systems, IEEE Computer Society.

• Andre Busche, Artus Krohn-Grimberghe, Lars Schmidt-Thieme (2010):
  Mining Music Playlogs for Next Song Recommendations, to appear in Workshop Proceedings of Knowledge Discovery, Data Mining, Maschinelles Lernen 2010 (KDML 2010).
• Nguyen Thai-Nghe, Lucas Drumond, Artus Krohn-Grimberghe, Lars Schmidt-Thieme (2010):
  Recommender System for Predicting Student Performance, to appear in Proceedings of ACM RecSys 2010 Workshop on Recommender Systems for Technology Enhanced Learning (RecSysTEL 2010), Elsevier Computer Science Procedia, Barcelona, Spain.
• Artus Krohn-Grimberghe, Alexandro Nanopoulos, Lars Schmidt-Thieme (2010):
  Integrating OLAP and Recommender Systems: An Evaluation Perspective, to appear in Proceeding of the ACM 13th international workshop on Data warehousing and OLAP, ACM.
• Artus Krohn-Grimberghe, Alexandro Nanopoulos, Lars Schmidt-Thieme (2010):
  A Novel Multidimensional Framework for Evaluating Recommender Systems, to appear in Proceedings of the ACM RecSys 2010 Workshop on User-Centric Evaluation of Recommender Systems and Their Interfaces (UCERSTI), CEUR-WS.
• Krisztian Buza, Alexandros Nanopoulos, Lars Schmidt-Thieme (2010):
  Graph-Based Model-Selection Framework for Large Ensembles, in 5th International Conference on Hybrid Artificial Intelligence Systems, HAIS2010, LNCS/LNAI 6076, pp. 559-566, Springer, Berlin/Heidelberg.
• Nguyen Thai-Nghe, Thanh-Nghi Do, Lars Schmidt-Thieme (2010):
  Learning Optimal Threshold on Resampling Data to Deal with Class Imbalance, to appear in Proceedings of the 8th IEEE International Conference on Computing and Communication Technologies: Research, Innovation, and Vision for the Future (RIVF 2010), IEEE Xplore, Hanoi, Vietnam.
• Nguyen Thai-Nghe, Thanh-Nghi Do, Lars Schmidt-Thieme (2010):
  Learning Optimal Threshold for Bayesian Posterior Probabilities to Mitigate the Class Imbalance Problem, to appear in Proceedings of the 3rd International Conference on Theories and Applications of Computer Science (ICTACS 2010), Cantho, Vietnam.
• Nguyen Thai-Nghe, Zeno Gantner, Lars Schmidt-Thieme (2010):
  Cost-Sensitive Learning Methods for Imbalanced Data, in Proceedings of the IEEE International Joint Conference on Neural Networks (IJCNN 2010), IEEE Computer Society, Barcelona, Spain. Student Travel Grant Award by INNS.
• Christine Preisach, Leandro Balby Marinho, Lars Schmidt-Thieme (2010):
  Semi-Supervised Tag Recommendation - Using Untagged Resources to Mitigate Coldstart Problems, to appear in PAKDD 2010: Proceedings of the 14th Pacific-Asia Conference on Knowledge Discovery and Data Mining, Hyderabad, India.
• Steffen Rendle, Christoph Freudenthaler, Lars Schmidt-Thieme (2010):
  Factorizing Personalized Markov Chains for Next-Basket Recommendation, in Proceedings of the 19th International World Wide Web Conference (WWW 2010), ACM, Raleigh, NC, USA. Best Paper Award.
• Sebastian Blohm, Krisztian Buza, Philipp Cimiano, Lars Schmidt-Thieme (2010):
  Relation Extraction for the Semantic Web with Taxonomic Sequential Patterns, to appear in Vijayan Sugumaran and Jon Atle Gulla (Editors). Applied Semantic Web Technologies. Boca Raton, FL: Taylor and Francis Group, ISBN: 978-14398-01567.
• Steffen Rendle, Lars Schmidt-Thieme (2010):
  Pairwise Interaction Tensor Factorization for Personalized Tag Recommendation, in Proceedings of the Third ACM International Conference on Web Search and Data Mining (WSDM 2010), ACM, New York, NY, USA. Best Student Paper Award.
• Christine Preisach, Leandro Balby Marinho, Lars Schmidt-Thieme (2009):
  Semi-Supervised Tag Recommendation for Cold-Start Problems, in 4th Annual Workshop for Women in Machine Learning, Poster Session.
• Krisztian Buza, Lars Schmidt-Thieme (2009):
  A Simple Ensemble Technique, in Analytic Challenge 'Ensembling' at the Australian Data Mining Conference (AusDM 2009).
• Zeno Gantner, Christoph Freudenthaler, Steffen Rendle, Lars Schmidt-Thieme (2009):
  Optimal Ranking for Video Recommendation, in User Centric Media: First International Conference, UCMedia 2009, Revised Selected Papers, Springer, Venice, Italy.
• Krisztian Buza, Christine Preisach, Andre Busche, Lars Schmidt-Thieme, Wye Houn Leong, Mark Walters (2009):
  Eigenmode Identification in Campbell Diagrams, in International Workshop on Machine Learning for Aerospace.
• Lorenza Romano, Krisztian Buza, Claudio Giuliano, Lars Schmidt-Thieme (2009):
  XMedia: Web People Search by Clustering with Machinely Learned Similarity Measures, in 2nd Web People Search Evaluation Workshop at World Wide Web Conference, Madrid, Spain.
• Steffen Rendle, Lars Schmidt-Thieme (2009):
  Factor Models for Tag Recommendation in BibSonomy, in ECML/PKDD Discovery Challenge 2009 at the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD-DC 2009), Bled, Slovenia. Best Discovery Challenge Award.
• Leandro Balby Marinho, Christine Preisach, Lars Schmidt-Thieme (2009):
  Relational Classification for Personalized Tag Recommendation, in ECML/PKDD Discovery Challenge 2009 at the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD-DC 2009), Bled, Slovenia. 2nd place in graph-based tag recommendation task.
• Nguyen Thai-Nghe, Andre Busche, Lars Schmidt-Thieme (2009):
  Improving Academic Performance Prediction by Dealing with Class Imbalance, in Proceedings of 9th IEEE International Conference on Intelligent Systems Design and Applications (ISDA 2009), IEEE Computer Society, Pisa, Italy, pp. 878--883.
• Zeno Gantner, Lars Schmidt-Thieme (2009):
  Automatic Content-based Categorization of Wikipedia Articles, in The People’s Web Meets NLP: Collaboratively Constructed Semantic Resources. Workshop at Joint Conference of the 47th Annual Meeting of the Association for Computational Linguistics and the 4th International Joint Conference on Natural Language Processing of the Asian Federation of Natural Language Processing (ACL 2009), Singapore.
• Steffen Rendle, Christoph Freudenthaler, Zeno Gantner, Lars Schmidt-Thieme (2009):
  BPR: Bayesian Personalized Ranking from Implicit Feedback, in Proceedings of the 25th Conference on Uncertainty in Artificial Intelligence (UAI 2009), Montreal, Canada.
• Avaré Stewart, Ernesto Diaz-Aviles, Leandro Balby Marinho, Alexandros Nanopoulos, Lars Schmidt-Thieme, Wolfgang Nejdl (2009):
  Cross-Tagging for Personalized Open Social Networking, in Proceedings of the 20th ACM Conference on Hypertext and Hypermedia (Hypertext2009) .
• Steffen Rendle, Leandro Balby Marinho, Alexandros Nanopoulos, Lars Schmidt-Thieme (2009):
  Learning Optimal Ranking with Tensor Factorization for Tag Recommendation, in Proceedings of the 15th ACM SIGKDD international conference on Knowledge discovery and data mining (KDD 2009), Paris, ACM.
• Steffen Rendle, Christine Preisach, Lars Schmidt-Thieme (2009):
  Learning to Extract Relations for Relational Classification, in Proceedings of the 13th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD 2009), Bangkok, Springer.
• Krisztian Buza, Lars Schmidt-Thieme (2009):
  Motif-based Classification of Time Series with Bayesian Networks and SVMs, in Proceedings of 32nd Annual Conference of the Gesellschaft für Klassifikation (GfKl 2008), Hamburg, Germany.
• Krisztian Buza, Leandro Balby Marinho, Lars Schmidt-Thieme (2008):
  On Learning Knowledge Bases for Collabularies, in Internation Scientific Conference Series in Honour of the Hungarian Science Day at the College of Dunaujvaros.
• Robert Jaeschke, Leandro Marinho, Andreas Hotho, Lars Schmidt-Thieme, Gerd Stumme (2008):
  Tag Recommendations in Social Bookmarking Systems, AI Commun. 21(4):231--247.
• Steffen Rendle, Lars Schmidt-Thieme (2008):
  Active Learning of Equivalence Relations by Minimizing the Expected Loss Using Constraint Inference, in Proceedings of 8th IEEE International Conference on Data Mining (ICDM 2008), Pisa.
• Christine Preisach, Steffen Rendle, Lars Schmidt-Thieme (2008):
  Relational Classification Using Automatically Extracted Relations by Record Linkage, in Proceedings of the High Level Information Extraction Workshop at the European Conference on Machine Learning (ECML-WS 2008).
• Leandro Balby Marinho, Krisztian Buza, Lars Schmidt-Thieme (2008):
  Folksonomy-based Collabulary Learning, in Proceedings of the International Semantic Web Conference (ISWC'08), Springer.
• Steffen Rendle, Lars Schmidt-Thieme (2008):
  Online-Updating Regularized Kernel Matrix Factorization Models for Large-Scale Recommender Systems, in Proceedings of the 2008 ACM Conference on Recommender Systems (RecSys 2008), ACM.
• Steffen Rendle, Lars Schmidt-Thieme (2008):
  Scaling Record Linkage to Non-Uniform Distributed Class Sizes, in Proceedings of the 12th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD 2008), Osaka, Springer.
• Karen Tso-Sutter, Leandro Marinho, Lars Schmidt-Thieme (2008):
  Tag-aware Recommender Systems by Fusion of Collaborative Filtering Algorithms, in Proceedings of 23rd Annual ACM Symposium on Applied Computing (SAC'08), Fortaleza, Brazil.
• Manuel Stritt, Lars Schmidt-Thieme, Gerhard Poeppel (2007):
  Combining Multi-Distributed Mixture Models and Bayesian Networks for Semi-Supervised Learning, in ICMLA '07: Proceedings of the Sixth International Conference on Machine Learning and Applications.
• Steffen Rendle, Lars Schmidt-Thieme (2007):
  Information Integration of Partially Labeled Data, in Proceedings of 31st Annual Conference of the German Classification Society (GfKl 2007), Freiburg, Springer.
• Stefan Hauger , Karen Tso, Lars Schmidt-Thieme (2007):
  Comparison of Recommender System Algorithms focusing on the New-Item and User-Bias Problem, in Proceedings of 31st Annual Conference of the Gesellschaft für Klassifikation (GfKl) 2007, Freiburg.
• Leandro Balby Marinho, Lars Schmidt-Thieme (2007):
  Collaborative Tag Recommendations, in Proceedings of 31st Annual Conference of the Gesellschaft für Klassifikation (GfKl) 2007, Freiburg, Springer.
• Dominik Benz, Karen Tso, Lars Schmidt-Thieme (2007):
  Supporting Collaborative Hierarchical Classification: Bookmarks as an Example, Special Issue on Innovations in Web Communications Infrastructure, Journal of Computer Networks Volume 51:16:4574--4585.
• Robert Jaeschke, Leandro Marinho, Andreas Hotho, Lars Schmidt-Thieme, Gerd Stumme (2007):
  Tag Recommendations in Folksonomies, in Proceedings of the 11th European Conference on Principles and Practice of Knowledge Discovery in Databases (PKDD) 2007, Warsaw, Poland.
• Robert Jaeschke, Leandro Marinho, Andreas Hotho, Lars Schmidt-Thieme, Gerd Stumme (2007):
  Tag Recommendations in Folksonomies, in Workshop Proceedings of Lernen - Wissensentdeckung - Adaptivitaet (LWA 2007) 13-20.
• Christine Preisach, Lars Schmidt-Thieme (2008):
  Ensembles of Relational Classifiers, Knowledge and Information Systems Journal 14(3).
• Christine Preisach, Lars Schmidt-Thieme (2006):
  Relational Ensemble Classification, in Proceedings of 6th IEEE International Conference on Data Mining (ICDM) 2006, Hong Kong.
• Steffen Rendle, Lars Schmidt-Thieme (2006):
  Object Identification with Constraints, in Proceedings of 6th IEEE International Conference on Data Mining (ICDM 2006), Hong Kong.
• Karen Tso, Lars Schmidt-Thieme (July 2006):
  Empirical Analysis of Attribute-Aware Recommender System Algorithms Using Synthetic Data, Journal of Computers Volume 1 Issue 4:18--29.
• Manuel Stritt, Karen Tso, Lars Schmidt-Thieme (2006):
  Attribute-Aware Anonymous Recommender Systems, in Proceedings of 30th Annual Conference of the Gesellschaft für Klassifikation (GfKl) 2006, Berlin, Springer, pp. 497--506.
• Dominik Benz, Karen Tso, Lars Schmidt-Thieme (2006):
  Automatic Bookmark Classification: A Collaborative Approach, in Proceedings of the Second Workshop on Innovations in Web Infrastructure (IWI 2006), Edinburgh, Scotland.
• Jochen Fischer, Zeno Gantner, Steffen Rendle, Manuel Stritt, Lars Schmidt-Thieme (2006):
  Ideas and Improvements for Semantic Wikis, in Proceedings of the Third European Semantic Web Conference (ESWC 2006), Budva, Montenegro, Springer.
• Karen Tso, Lars Schmidt-Thieme (2006):
  Evaluation of Attribute-aware Recommender System Algorithms on Data with Varying Characteristics, in Proceedings of the Tenth Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD 2006), Singapore, Springer, pp. 831-840.
• Manuel Stritt, Karen Tso, Lars Schmidt-Thieme, Dirk Schwarz (2005):
  Anonymous Recommender Systems, ÖGAI Journal Jahrgang 2005, Nr. 4:4-11.
• Lars Schmidt-Thieme (2005):
  Compound Classification Models for Recommender Systems, in Proceedings of the IEEE International Conference on Data Mining (ICDM) 2005, Houston, USA.
• Ferenc Bodon, Lars Schmidt-Thieme (2005):
  The Relation of Closed Itemset Mining, Complete Pruning Strategies and Item Ordering in APRIORI-based FIM algorithms, in Proceedings of the 9th European Conference on Principles and Practice of Knowledge Discovery in Databases (PKDD) 2005, Porto, Portugal.
• Ferenc Bodon, Balazs Racz, Lars Schmidt-Thieme (2005):
  On Benchmarking Frequent Itemset Mining Algorithms, in Proceedings of the Open Source Data Mining Workshop, 11th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD) 2005, Chicago, USA.
• Karen Tso, Lars Schmidt-Thieme (2005):
  Sensitivity of Attributes on the Performance of Attribute-Aware Collaborative Filtering, in Proceedings of the 5th biennial meeting of CLAssification and Data Analysis Group (CLADAG'05) 2005, Parma, Italy, Springer, pp. 279--286.
• Karen Tso, Lars Schmidt-Thieme (2005):
  Attribute-aware Collaborative Filtering, in Proceedings of 29th Annual Conference of the Gesellschaft für Klassifikation (GfKl) 2005, Magdeburg, Springer, pp. 614--621.
• Lars Schmidt-Thieme, Martin Schader (2005):
  Performance Drivers for Depth-First Frequent Pattern Mining, in Daniel Baier, Reinhold Decker, Lars Schmidt-Thieme (eds.): Data Analysis and Decision Support, Springer.
• Peter Fankhauser, Manfred Fuhr, Jens Hartmann, Anthony Jameson, P. Klas, Stefan Klink, Agnes Koschmider, S. Kriewel, Patrick Lethi, P. Luksch, E.W. Mayr, Andreas Oberweis, Paul Ortyl, Stefan Pfingstl, P. Reuther, Ute Rusnak, G. Sautter, K. Böhm, A. Schaefer, Lars Schmidt-Thieme, Eric Schwarzkopf, Nenad Stojanovic, Rudi Studer, R. Vollmar, Bernd Walter, Alexander Weber (2005):
  Fachinformationsystem Informatik (FIS-I) und Semantische Technologien für Informationsportale (SemIPort), in Proceedings of Informatik 2005, Bonn.
• Ernesto Diaz-Aviles, Lars Schmidt-Thieme, Cai Ziegler (2005):
  Emergence of Spontaneous Order Through Neighbourhood Formation in Peer-to-Peer Recommender Systems, in 1st International Workshop on Innovations In Web Infrastructure, 14th International World Wide Web Conference (WWW) 2005, Keio, Japan.
• Peter Haase, Andreas Hotho, Lars Schmidt-Thieme, York Sure (2005):
  Usage-driven Evolution of Personal Ontologies, in Proceedings of the 3rd International Conference on Universal Access in Human-Computer Interaction (UAHCI), 22--27 July, 2005, Las Vegas, Nevada USA.
• Jens Hartmann, Nenad Stojanovic, Rudi Studer, Lars Schmidt-Thieme (2005):
  Ontology-Based Query Refinement for Semantic Portals, in Hemmje, M., Niederee, C., Risse, Th. (eds.): From Integrated Publication and Information Systems to Information and Knowledge Environments, Springer, pp. 41-50.
• Lars Schmidt-Thieme (2004):
  Algorithmic Features of Eclat, in Proceedings of the Frequent Itemset Mining Implementations Workshop, IEEE International Conference on Data Mining (ICDM), Brighton, UK.
• Philipp Cimiano, Lars Schmidt-Thieme, Alexander Pivk, Steffen Staab (2004):
  Learning Taxonomic Relations from Heterogeneous Evidence, in Proceedings of the Ontology Learning and Population Workshop, 16th European Conference on Artificial Intelligence (ECAI) 2004, Valencia, Spanien.
• Cai Ziegler, Georg Lausen, Lars Schmidt-Thieme (2004):
  Taxonomy-driven Computation of Product Recommendations, in Proceedings of the 2004 ACM International Conference on Information and Knowledge Management (CIKM '04), November 8-13, 2004, Washington D.C., USA.
• Cai Ziegler, Lars Schmidt-Thieme, Georg Lausen (2004):
  Exploiting Semantic Product Descriptions for Recommender Systems, in Proceedings of the 2nd ACM SIGIR Semantic Web and Information Retrieval Workshop (SWIR '04), July 25-29, 2004, Sheffield, UK.
• Stefan Born, Lars Schmidt-Thieme (2004):
  Optimal Discretization of Quantitative Attributes for Association Rules, in Classification, Clustering, and Data Mining Applications, Proceedings of the Meeting of the International Federation of Classification Societies (IFCS), Illinois Institute of Technology, Chicago, 15--18 July 2004, pp. 287--296.
• Christoph Breidert, Michael Hahsler, Lars Schmidt-Thieme (2004):
  Reservation Price Estimation by Adaptive Conjoint Analysis, in Proceedings of the 28th Annual Conference of the Gesellschaft für Klassifikation (GfKl), University of Dortmund, March 9--11, 2004, Springer, pp. 569-576.
• Wolfgang Gaul, Patrick Thoma, Lars Schmidt-Thieme, Sven van den Bergh (2003):
  Visualizing Recommender Systems via Multidimensional Scaling, in Ahr, D., Fahrion, R., Oswald, M., Reinelt, G. (eds.): Operations Research Proceedings 2003, Selected Papers of the International Conference on Operations Research (OR 2003), Heidelberg, September 3--5, 2003, pp. 189-196.
• Wolfgang Gaul, Lars Schmidt-Thieme (2002):
  Mining Web Navigation Path Fragments, in Nishisato, S., Baba, Y., Bozdogan, H., Kanefuji, K. (Eds.): Measurement and Multivariate Analysis, Springer, pp. 249-260.
• Wolfgang Gaul, Andreas Geyer-Schulz, Michael Hashler, Lars Schmidt-Thieme (2002):
  eMarketing mittels Recommendersystemen, Marketing ZFP 24:47-55.
• Wolfgang Gaul, Lars Schmidt-Thieme (2002):
  Recommender Systems Based on User Navigational Behavior in the Internet, Behaviormetrika 29:1-22.
• Lars Schmidt-Thieme, Wolfgang Gaul (2002):
  Aufzeichnung des Nutzerverhaltens - Erhebungstechniken und Datenformate, in Hajo Hippner et. al. (eds.): Handbuch Web Mining im Marketing, Braunschweig/Wiesbaden.
• Wolfgang Gaul, Lars Schmidt-Thieme (2002):
  Web Controlling und Recommendersysteme, in Hajo Hippner et. al. (eds.): Handbuch Web Mining im Marketing, Braunschweig/Wiesbaden.
• Wolfgang Gaul, Lars Schmidt-Thieme (2001):
  Mining Generalized Association Rules for Sequential and Path Data, in Proceedings of the 2001 IEEE International Conference on Data Mining (ICDM), San Jose, pp. 593-596.
• Wolfgang Gaul, Lars Schmidt-Thieme (2001):
  Recommender Systems Based on Navigation Path Features, in Proceedings of the Web Mining Workshop, The Seventh ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD), San Francisco.
• Lars Schmidt-Thieme, Wolfgang Gaul (2001):
  Frequent Substructures in Web Usage Data -- a Unified Approach, in Proceedings of the Web Mining Workshop, First SIAM International Conference on Data Mining 2001 (SDM), Chicago.
• Wolfgang Gaul, Lars Schmidt-Thieme (2000):
  Mining Web Navigation Path Fragments, in Proceedings of WebKDD Workshop 2000, The Sixt ACM SIGKDD International Conference on Knowledge Discovery and Data Mining 2000 (KDD), Boston.
• Wolfgang Gaul, Lars Schmidt-Thieme (2000):
  Frequent Generalized Subsequences - a Problem from Web Mining, in Wolfgang Gaul, Otto Opitz, and Martin Schader (eds.): Data Analysis, Scientific Modelling and Practical Application, Springer, pp. 429-445.
• Lars Schmidt-Thieme (1999):
  Lineare Differentialoperatoren mit endlicher Galoisgruppe, Preprint des Instituts für Wissenschaftliches Rechnen (IWR), Universität Heidelberg.
• Lars Schmidt-Thieme (2000):
  Haydns Sonatenrondo, in Chr.-H. Mahling, Kr. Pfarr (eds.): Aspekte historischer und systematischer Musikforschung, Mainz, pp. 229-239.
• Lars Schmidt-Thieme (1997):
  Form und Harmonik der zweistimmigen ballate Francesco Landinis, Musiktheorie 12:125-145.