Publikationen

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Erdős-Zahl: 3

Advances-in-Artificial-Intelligence

2025

  • S. Steindl, U. Schäfer, B. Ludwig. CoPrUS: Consistency Preserving Utterance Synthesis towards more realistic benchmark dialogues. In: Proceedings of the 2025 International Conference on Computational Linguistics (COLING 2025), Abu Dhabi, UAE. ICCL. https://arxiv.org/abs/2412.07515. Accepted for publication at the COLING 2025 main conference as long paper, 2025.

2024

2023

  • S. Steindl, U. Schäfer, and B. Ludwig. Controlled Data Augmentation for Training Task-Oriented Dialog Systems with Low Resource Data. In: Proceedings of EMNLP-2023, 2nd Workshop on Pattern-based Approaches to NLP in the Age of Deep Learning (PANDL-WS), pages 92–102. DOI: 10.18653/v1/2023.pandl-1.9. Association for Computational Linguistics. Singapore, 2023.
  • S. Steindl, U. Schäfer, B. Ludwig. Generating Synthetic Dialogues from Prompts to Improve Task-Oriented Dialogue Systems. In: Seipel, D., Steen, A. (eds), Proc. of KI-2023: Advances in Artificial Intelligence. Lecture Notes in Computer Science, Vol 14236. pages 207-214. Springer. DOI: 10.1007/978-3-031-42608-7_17, 2023.
  • U. Schäfer, S. Steindl. Teaching Natural Language Processing in an Artificial Intelligence Master’s Study Program with Focus on Industrial Applications and for Professional Training. KONVENS-2023 Workshop on Teaching for Natural Language Processing (Teach4NLP) Posters, GSCL, Ingolstadt, 2023.

2019

  • U. Schäfer. Teaching Modern C++ with Flipped Classroom and Enjoyable IoT Hardware. In: Proc. of the IEEE Global Engineering Education Conference (EDUCON‌ 2019), Dubai, United Arab Emirates, pages 910-919.  DOI: 10.1109/EDUCON.2019.8725068, 2019.

2017

  • U. Schäfer. Training Scrum with Gamification  - Lessons learned after two teaching periods. In: Proc. of the IEEE Global Engineering Education Conference (EDUCON 2017), Athens, Greece, pages 754-761. DOI 10.1109/EDUCON.2017.7942932, 2017.
  • B. Martens,  D. Bittner, D. Meiller, D. Heckmann, U. Schäfer, M. Frey. Interactive Smart Mirror. In: M. Burghardt, R. Wimmer, C. Wolff, C. Womser-Hacker (Hrsg.), Mensch und Computer 2017. Regensburg, Germany: Gesellschaft für Informatik e.V., pages 633-636. DOI 10.18420/muc2017-demo-0286, 2017.

2016

  • U. Schäfer. Teaching Scrum with Minecraft. In: Proc. of European Conference on Software Engineering Education (ECSEE) 2016, Seeon, Germany, pages 191-195. ISBN 978-3-8440-4515-4, 2016.

2015

  • J. Alexandersson, U. Schäfer, J. Britz, M. Rekrut, F. Arnold, S. Reifers. Kochbot in the Intelligent Kitchen - Speech-enabled Assistance and Cooking Control in a Smart Home. In: Proc. of 8th German AAL-Kongress, pages 396-405, Frankfurt, Germany, VDE, 2015. 

2013

  • U. Schäfer, F. Arnold, S. Ostermann, S. Reifers. Ingredients and Recipe for a Robust Mobile Speech-enabled Cooking Assistant for German. In KI 2013: Advances in Artificial Intelligence, Lecture Notes in Computer Science (LNCS) no. 8077, pages 212-223. Springer Berlin Heidelberg, September 2013. DOI 10.1007/978-3-642-40942-4_19.
  • M. Minev, C. Schommer, U. Schäfer, and T. Grammatikos. Dimensionality Reduction of News Texts Using Composite Features. In Bridging between Information Retrieval and Databases, PROMISE WS, Bressanone, Italy, February 2013. (Best Poster Award)

2012

  • Ulrich Schäfer, Bernd Kiefer, Christian Spurk, Jörg Steffen, Rui Wang, Benjamin Weitz, Magdalena Wolska: The Searchbench - Combining Sentence-semantic, Full-text and Bibliographic Search in Digital Libraries. LIBER quarterly Journal, Vol. 22, no. 4 (2012) 285-309.
  • Melanie Reiplinger, Ulrich Schäfer, Magdalena Wolska: Extracting Glossary Sentences from Scholarly Articles: A Comparative Evaluation of Pattern Bootstrapping and Deep Analysis. Proceedings of the ACL-2012 Main Conference Workshop on Rediscovering 50 Years of Discoveries, pages 55-65. Jeju Island, Republic of Korea, 2012.
  • Ulrich Schäfer, Jonathon Read, Stephan Oepen: Towards an ACL Anthology Corpus with Logical Document Structure. An Overview of the ACL 2012 Contributed Task. Proceedings of the ACL-2012 Main Conference Workshop on Rediscovering 50 Years of Discoveries, pages 88-97. Jeju Island, Republic of Korea, 2012.
  • Ulrich Schäfer, Benjamin Weitz: Combining OCR Outputs for Logical Document Structure Markup. Technical Background to the ACL 2012 Contributed Task. Proceedings of the ACL-2012 Main Conference Workshop on Rediscovering 50 Years of Discoveries, pages 104-109. Jeju Island, Republic of Korea, 2012.
  • Benjamin Weitz, Ulrich Schäfer: A Graphical Citation Browser for the ACL Anthology. Proceedings of the 8th International Conference on Language Resources and Evaluation (LREC-2012), pages 1718-1722, ELRA, Istanbul, Turkey, 2012.
  • Ulrich Schäfer: Satzsemantische Suche - präziser Finden mit der TAKE Searchbench. DOK.magazin - Technologien, Strategien & Services für das digitale Dokument, volume 2/2012, pages 28-31. Dasing, Germany, 2012.
  • Ulrich Schäfer, Magdalena Wolska: Automatische Terminologie-, Taxonomie- und Glossarextraktion. DOK.magazin - Technologien, Strategien & Services für das digitale Dokument, volume 6/2012, pages 62-65. Dasing, Germany, 2012.
  • Ulrich Schäfer, Christian Spurk, Jörg Steffen: A fully Coreference-annotated Corpus of Scholarly Papers from the ACL Anthology. Proceedings of the 24th International Conference on Computational Linguistics (COLING 2012), pages 1059-1070, Mumbai, India, 2012.

2011

  • Ulrich Schäfer, Bernd Kiefer, Christian Spurk, Jörg Steffen, Rui Wang: The ACL Anthology Searchbench. Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies (ACL HLT 2011), System Demonstrations, pages 7-13, 2011. Portland, OR, USA.
  • Ulrich Schäfer, Bernd Kiefer: Advances in Deep Parsing of Scholarly Paper Content. Book Chapter in: Raffaella Bernardi, Sally Chambers, Björn Gottfried, Frédérique Segond, Ilya Zaihrayeu (eds.): Advanced Language Technologies for Digital Libraries. Springer LNCS Theoretical Computer Science Series, LNCS 6699, pages 135-153, 2011.
  • Arif Bramantoro, Ulrich Schäfer, Toru Ishida: Pipelining Software and Services for Language Processing. Book Chapter 16 in: Toru Ishida and Donghui Lin (eds.): The Language Grid: Service-Oriented Collective Intelligence for Language Resource Interoperability. Springer LNCS Cognitive Technologies Series, pages 247-262, 2011.
  • Peter Adolphs, Martin Theobald, Ulrich Schäfer, Hans Uszkoreit, Gerhard Weikum: YAGO-QA: Answering Questions by Structured Knowledge Queries. Proceedings of the Fifth IEEE International Conference on Semantic Computing (ICSC-2011), pages 158-161, IEEE Computer Society, 2011. Los Alamitos, CA, USA.
  • Cailing Dong, Ulrich Schäfer: Ensemble-style Self-training on Citation Classification. Proceedings of the 5th International Joint Conference on Natural Language Processing (IJCNLP2011), pages 623-631, 2011. Chiang Mai, Thailand.
  • Magdalena Wolska, Ulrich Schäfer, The Nghia Pham: Bootstrapping a Domain-specific Terminological Taxonomy from Scientific Text. 9th International Conference on Terminology and Artificial Intelligence (TIA), pages 17-23, Paris, France, 2011.

2010

  • Ulrich Schäfer, Christian Spurk: TAKE Scientist's Workbench: Semantic Search and Citation-based Visual Navigation in Scholar Papers. Proceedings of the Fourth IEEE International Conference on Semantic Computing (ICSC-2010), pages 317-324, September 2010, IEEE Computer Society, Los Alamitos, CA, USA.
  • Ulrich Schäfer, Uwe Kasterka: Scientific Authoring Support: A Tool to Navigate in Typed Citation Graphs. Proceedings of the 11th Annual Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (NAACL HLT 2010) Workshop on Computational Linguistics and Writing: Writing Processes and Authoring Aids (CL&W-2010), pages 7-14, June 2010, Los Angeles, CA.
  • Hans-Ulrich Krieger, Ulrich Schäfer: DL Meet FL: A Bidirectional Mapping between Ontologies and Linguistic Knowledge. Proceedings of the 23rd International Conference on Computational Linguistics (COLING 2010), pages 588-596, August 2010, Beijing, China.
  • Arif Bramantoro, Ulrich Schäfer, Toru Ishida: Towards an Integrated Architecture for Composite Language Services and Multiple Linguistic Processing Components. Proceedings of the 7th International Conference on Language Resources and Evaluation (LREC-2010), pages 3506-3511, May 2010, Valletta, Malta.

2008

  • Ulrich Schäfer, Hans Uszkoreit, Christian Federmann, Torsten Marek, Yajing Zhang: Extracting and Querying Relations in Scientific Papers. In Proceedings of the 31st Annual German Conference on Artificial Intelligence, KI 2008, Springer LNCS 5243, pages 127-134, September 2008, Kaiserslautern, Germany.
  • Ulrich Schäfer: Shallow, Deep and Hybrid Processing with UIMA and Heart of Gold. In Proceedings of the LREC-2008 Workshop Towards Enhanced Interoperability for Large HLT Systems: UIMA for NLP, 6th International Conference on Language Resources and Evaluation (LREC-2008), pages 43-50. May 31, 2008, Marrakesh, Morocco.
  • Ulrich Schäfer, Hans Uszkoreit, Christian Federmann, Torsten Marek, Yajing Zhang: Extracting and Querying Relations in Scientific Papers on Language Technology. In Proceedings of the 6th International Conference on Language Resources and Evaluation (LREC-2008), pages 3040-3046, May 2008, Marrakesh, Morocco.
  • Arif Bramantoro, Masahiro Tanaka, Yohei Murakami, Ulrich Schäfer, Toru Ishida: A Hybrid Integrated Architecture for Language Service Composition. In Proceedings of the IEEE International Conference on Web Services (ICWS-2008), pages 345-352. September 2008, Beijing, China.

2007

  • Ulrich Schäfer: Integrating Deep and Shallow Natural Language Processing Components - Representations and Hybrid Architectures. PhD dissertation. Faculty of Mathematics and Computer Science, Saarland University, Saarbrücken, Germany. June 2007. Also as Volume 22 of the Saarbrücken dissertation series in Computational Linguistics and Language Technology, 356 pages, Saarbrücken, Germany, 2007.
  • Anette Frank, Hans-Ulrich Krieger, Feiyu Xu, Hans Uszkoreit, Berthold Crysmann, Brigitte Jörg, Ulrich Schäfer: Question Answering from Structured Knowledge Sources. In: Journal of Applied Logic. Vol. 5, No. 1. Elsevier Science, pages 20-48. doi:10.1016/j.jal.2005.12.006, 2007.

2006

  • Ulrich Schäfer, Daniel Beck: Automatic Testing and Evaluation of Multilingual Language Technology Resources and Components. Proceedings of the 5th International Conference on Language Resources and Evaluation LREC-2006, pages 173-178, May 2006, Genoa, Italy.
  • Ulrich Schäfer: Middleware for Creating and Combining Multi-dimensional NLP Markup. Proceedings of the 5th Workshop on NLP and XML (NLPXML-2006): Multi-dimensional Markup in Natural Language Processing, 11th Conference of the European Chapter of the Association for Computational Linguistics (EACL-2008), pages 81-84. April 2006, Trento, Italy.
  • Ulrich Schäfer: OntoNERdIE - Mapping and Linking Ontologies to Named Entity Recognition and Information Extraction Resources. Proceedings of the 5th International Conference on Language Resources and Evaluation LREC-2006, pages 1756-1761. May 2006, Genoa, Italy.
  • Ben Waldron, Ann Copestake, Ulrich Schäfer, Bernd Kiefer: Preprocessing and Tokenisation Standards in DELPH-IN Tools. Proceedings of the 5th International Conference on Language Resources and Evaluation LREC-2006, pages 2263-2268. May 2006, Genoa, Italy.
  • Christian Bering, Ulrich Schäfer: JTaCo & SProUTomat - Automatic Evaluation and Testing of Multilingual Language Technology Resources and Components. In Proceedings of the LREC-2006 Workshop on Quality Assurance and Quality Measurement for Language and Speech Resources, pages 42-47, May 2006, Genoa, Italy.

2005

  • Witold Drozdzynski, Hans-Ulrich Krieger, Jakub Piskorski, Ulrich Schäfer: SProUT - a General-Purpose NLP Framework Integrating Finite-State and Unification-based Grammar Formalisms. In Proceedings of the 5th International Workshop on Finite-State Methods and Natural Language Processing, Springer LNCS 4002. pages September 2005, Helsinki, Finland.
  • Anette Frank, Hans-Ulrich Krieger, Feiyu Xu, Hans Uszkoreit, Berthold Crysmann, Brigitte Jörg, Ulrich Schäfer: Querying Structured Knowledge Sources. Proceedings of the AAAI-05 Workshop on Question Answering in Restricted Domains, pages 10-19, July 2005, Pittsburgh, Pennsylvania.

2004

  • Witold Drozdzynski, Hans-Ulrich Krieger, Jakub Piskorski, Ulrich Schäfer: A Multilingual Content Production Tool for the Semantic Web. European Conference on Knowledge Engineering and Knowledge Management (EKAW-04), October 2004, Northamptonshire, UK.
  • Hans-Ulrich Krieger, Witold Drozdzynski, Jakub Piskorski, Ulrich Schäfer, Feiyu Xu: A Bag of Useful Techniques for Unification-Based Finite-State Transducers. In Proceedings of 7th KONVENS, pages 105-112. September 2004, Vienna, Austria.
  • Hans Uszkoreit, Ulrich Callmeier, Andreas Eisele, Ulrich Schäfer, Melanie Siegel, Jakob Uszkoreit: Hybrid Robust Deep and Shallow Semantic Processing for Creativity Support in Document Production. In Proceedings of 7th KONVENS, pages 209-216. September 2004, Vienna, Austria.
  • Ulrich Schäfer: Using XSLT for the Integration of Deep and Shallow Natural Language Processing Components. In: Kiril Simov, Erhard Hinrichs: Proceedings of the ESSLLI 2004 Workhop on Combining Shallow and Deep Processing for NLP, pages 31-40. August 2004, Nancy, France.
  • Anette Frank, Kathrin Spreyer, Witold Drozdzynski, Hans-Ulrich Krieger, Ulrich Schäfer: Constraint-Based RMRS Construction from Shallow Grammars. Proceedings of the HPSG04 Conference Workshop on Semantics in Grammar Engineering, Center for Computational Linguistics, Katholieke Universiteit Leuven, Belgium, pages 393-413. August 2004. CSLI Publications, Stanford, CA.
  • Ulrich Callmeier, Andreas Eisele, Ulrich Schäfer, Melanie Siegel: The DeepThought Core Architecture Framework. In Proceedings of the 4th International Conference on Language Resources and Evaluation (LREC) 2004, pages 1205-1208, European Language Resources Association, May 2004. Lisbon, Portugal.
  • Kiyong Lee, Lou Burnard, Laurent Romary, Eric de la Clergerie, Ulrich Schäfer, Thierry Declerck, Syd Bauman, Harry Bunt, Lionel Clément, Tomaz Erjavec, Azim Roussanaly, Claude Roux: Towards an international standard on feature structure representation (2). In Proceedings of the LREC-2004 workshop on A Registry of Linguistic Data Categories within an Integrated Language Resources Repository Area, pages 63-70, May 2004. Lisbon, Portugal.
  • Witold Drozdzynski, Hans-Ulrich Krieger, Jakub Piskorski, Ulrich Schäfer, Feiyu Xu: Shallow Processing with Unification and Typed Feature Structures - Foundations and Applications. In: Künstliche Intelligenz, Volume 1, pages 17-23. 2004.

2003

  • Anette Frank, Markus Becker, Berthold Crysmann, Bernd Kiefer, Ulrich Schäfer: Integrated Shallow and Deep Parsing: TopP meets HPSG. Proceedings of ACL-2003, pages 104-111, July 2003, Sapporo, Japan.
  • Stephan Busemann, Witold Drozdzynski, Hans-Ulrich Krieger, Jakub Piskorski, Ulrich Schäfer, Hans Uszkoreit, Feiyu Xu: Integrating Information Extraction and Automatic Hyperlinking. Proceedings of the Interactive Posters/Demonstration at ACL-2003, pages 117-120. July 2003, Sapporo, Japan.
  • Ulrich Schäfer: WHAT: An XSLT-based Infrastructure for the Integration of Natural Language Processing Components. Proceedings of the Workshop on the Software Engineering and Architecture of Language Technology Systems (SEALTS), HLT-NAACL03, pages 9-16. May 2003. Edmonton, Canada.
  • Christian Bering, Witold Drozdzynski, Gregor Erbach, Clara Guasch, Petr Homola, Sabine Lehmann, Hong Li, Hans-Ulrich Krieger, Jakub Piskorski, Ulrich Schäfer, Atsuko Shimada, Melanie Siegel, Feiyu Xu, Dorothee Ziegler-Eisele: Corpora and evaluation tools for multilingual named entity grammar development. Proceedings of Multilingual Corpora Workshop at Corpus Linguistics 2003, pages 42-52, March 2003, Lancaster, UK.

2002

  • Markus Becker, Witold Drozdzynski, Hans-Ulrich Krieger, Jakub Piskorski, Ulrich Schäfer, Feiyu Xu: SProUT - Shallow Processing with Typed Feature Structures and Unification. Proceedings of the International Conference on Natural Language Processing (ICON 2002). December 2002, Mumbai, India.
  • Berthold Crysmann, Anette Frank, Bernd Kiefer, Hans-Ulrich Krieger, Stefan Müller, Günter Neumann, Jakub Piskorski, Ulrich Schäfer, Melanie Siegel, Hans Uszkoreit, Feiyu Xu: An Integrated Architecture for Shallow and Deep Processing. Proceedings of ACL-2002, Association for Computational Linguistics 40th Anniversary Meeting, pages 441-448. July 2002, Philadelphia, PA.
  • Günter Neumann, Ulrich Schäfer: Whiteboard - Eine XML-basierte Architektur für die Analyse natürlichsprachlicher Texte. Proceedings of Online-2002, 25th European Congress Fair for Technical Communication, volume C, pages 635.01-635.12, January 2002, Düsseldorf, Germany.

Earlier

  • Ulrich Schäfer: Parameterized Type Expansion in the Feature Structure Formalism TDL. Diplomarbeit, Fachbereich Informatik, Universität des Saarlandes, November 1995. Saarbrücken, Germany.
  • Hans-Ulrich Krieger, Ulrich Schäfer: Efficient Parameterizable Type Expansion for Typed Feature Formalisms. In Proceedings of the 14th International Joint Conference on Artificial Intelligence (IJCAI), volume 2, pages 1428-1434. August 1995. Montreal, Canada.
  • Hans-Ulrich Krieger, Ulrich Schäfer: TDL - A Type Description Language for HPSG, Part 2: User Manual. DFKI Document No. D-94-14. December 1994. Saarbrücken, Germany.
  • Hans-Ulrich Krieger, Ulrich Schäfer: TDL - A Type Description Language for HPSG, Part 1: Overview. DFKI Research Report No. RR-94-37. November 1994. Saarbrücken, Germany.
  • Hans-Ulrich Krieger, Ulrich Schäfer: TDL - A Type Description Language for Constraint-Based Grammars. In Proceedings of the 15th International Conference on Computational Linguistics, COLING-94, pages 893-899, August 1994. Kyoto, Japan.
  • Hans-Ulrich Krieger, Ulrich Schäfer: TDL ExtraLight User's Guide. DFKI Doc. No. D-93-09. December 1993. Saarbrücken, Germany.
  • Hans-Ulrich Krieger, Ulrich Schäfer: TDL - A Type Description Language for Unification-Based Grammars. In Proceedings Neuere Entwicklungen der deklarativen KI-Programmierung, KI-93 Workshop, pages 67-82. Humboldt-Universität, September 1993. Berlin, Germany.