Scientific Profile & Research Agenda

I received my Diplom from Stuttgart University by simulation of traffic with high-level Petri-Nets. I received my Dr.-Ing. from the Berlin-Brandenburg Graduate School for Distributed Information Systems by analysis of information value with Bayesian Networks. I am currently working on a new ontology (representation & processing) for managing quality in the emerging shared knowledge space of the information society.

Research Focus:

1. User and Information Quality Dimensions & Metrics
2. User Type Classification and Detection
3. Bayesian Co-Evaluation for User and Content Quality

Please follow the link to the Collaborative Systems Group. We are searching for motivated students at all levels (Senior, Master, Phd) for enlarging our research group.

Professional Services

• Reviewing Service for
• Information Sciences (Journal)
• The Learning Organization (Journal)
• The International ACM Conference on Management of Emergent Digital EcoSystems (ACM MEDES, since 2009)
• International Conference on Applications of Natural Language to Information Systems (NLDB, since 2008)
  
• Engineering Semantic Agent Systems (ESAS, since 2006)
  
• Co-Chair of Evolutionary Models of Collaboration (EMC'07) at the Twentieth International Joint Conference on Artificial Intelligence, Hyderabad, India, 2007.
• Co-Organizer of the 3rd Symposium Electronic Business of the Humboldt University, Alliance of Knowledge: Science and Business on the Way to the Knowledge Society, Berlin, Germany, 2002.
• Member of the Association of Computing Machinery (ACM)
• Member of the Gesellschaft für Informatik (GI)

Publications

[1]	Markus Schaal, Guven Fidan, Roland M. Müller, and Orhan Dagli. Quality assessment in the blog space. The Learning Organization, Special Issue on Web2.0: new and challenging practical issues, 17(6):529 - 536, 2010. [ bib ]
[2]	Xiaohui Lu, Markus Schaal, Sibel Adali, and Anand Kishore Raju. Detecting User Types in Object Ranking Decisions. In MEDES '09: Proceedings of the International Conference on Management of Emergent Digital EcoSystems, pages 149-156, New York, NY, USA, 2009. ACM. [ bib ]
[3]	Epaminondas Kapetanios and Markus Schaal. A Model and Algebra for Collaborative Semantic Annotation in Digital Libraries. 2008. [ bib ]
[4]	Hayrettin Gürkök, Murat Karamuftuoglu, and Markus Schaal. A Graph Based Approach to Estimating Lexical Cohesion. In IIiX '08: Proceedings of the Second International Symposium on Information Interaction in Context, pages 35-43, New York, NY, USA, 2008. ACM. [ bib ]
[5]	Markus Schaal and Yavuz Eren. Dynamics of Commitment and Contribution Quality in Collaborative Communities. In Proceedings of the 3rd International Conference on Collaborative Computing: Networking, Applications and Worksharing (CollaborateCom), pages 294-298. IEEE, 2007. [ bib ]
[6]	Markus Schaal. Collaborative Creation of Knowledge Goods - A Transfer Model for Success Factors, September 2006. [ bib ]
[7]	Markus Schaal. A bayesian approach for small information trust updates. In Proceedings of IeCCS 2006, 2006. [ bib ]
[8]	Markus Schaal. Basisinitiative für eine Parteibildung von unten (BiPu) – ein sozio-technischer Ansatz für die demokratische Texterstellung. In Prof. Dr.-Ing. Christian Hochberger and Prof. Dr.-Ing. habil. Rüdiger Liskowsky, editors, Lecture Notes in Informatics (LNI) - Proceedings: Informatik für Menschen, volume P-93 of Series of the Gesellschaft für Informatik (GI), pages 426-430, Bonn, 2006. [ bib ]
[9]	Myra Spiliopoulou, Markus Schaal, Roland Mueller, and Marko Brunzel. Evaluation of unsupervised ontology enhancement tools. In KDO-2005 Second International Workshop on Knowledge Discovery and Ontologies, Porto, Portugal, October 2005. [ bib ]
[10]	Markus Schaal, Roland M. Müller, Marko Brunzel, and Myra Spiliopoulou. RELFIN - topic discovery for ontology enhancement and annotation. In ESWC, pages 608-622, 2005. [ bib | http ]
[11]	Markus Schaal. Notification Agents for Mobile Route Guidance. PhD thesis, TU Berlin, 2004. [ bib | .pdf ]
[12]	Markus Schaal and Hans-Joachim Lenz. Notification Planning with Developing Information States, pages 63-70. Number 472 in CISM Courses and Lectures. Springer Wien New York, Udine, 2003. [ bib ]
[13]	Mattis Neiling, Markus Schaal, and Martin Schumann. Wrapit: Automated integration of web databases with extensional overlaps. WebDB 2002, 2002. [ bib ]
[14]	Dmitri Asonov, Markus Schaal, and Johann-Christoph Freytag. Absolute privacy in voting. Proceedings of Information Security Conference 2001, 2001. [ bib ]
[15]	Markus Schaal and Hans-Joachim Lenz. Best Time and Content for Delay Notification. In Proceedings of the TIME01 International Symposium, Cividale, Italy, 2001. [ bib | .pdf ]
[16]	Markus Schaal. A computational model for information value. In Workshop Proceedings of the CAiSE'2000 7th Doctoral Consortium, Stockholm, June 2000. [ bib | .pdf ]
[17]	Markus Schaal and Thomas Kämpke. Cross-organizational computation of fastest paths. In Proceedings of ODYSSEUS 2000 - First International Workshop on Freight Transportation and Logistics, Chania, Crete, May 2000. [ bib ]
[18]	Juliane Dehnert and Markus Schaal. Modellierung und Spezifikation von Zeitaspekten. Seminar-Abschluß-Bericht, Technische Universität Berlin, March 2000. [ bib ]
[19]	Markus Schaal. Probabilistic Plan Evaluation - A Prerequisite for a Model of Information Value Dynamics. Forschungsberichte des Fachbereichs Informatik 2000-16, Technische Universität Berlin, 2000. [ bib | .pdf ]
[20]	Stephan Schnittger, Tobias Henninger, and Markus Schaal. DELFI - Durchgängige Elektronische FahrplanInformation (Abschlusbericht Phase II. Projektbericht im Auftrag des Bundesministers für Verkehr, Forschungsinstitut für anwendungsorientierte Wissensverarbeitung, Ulm, 1999. [ bib ]
[21]	T. Kämpke and M. Schaal. Distributed Generation of Fastest Paths. Proceedings of the 10th IASTED International Conference on Parallel and Distributed Computing and Systems, pages 172-177, 1998. [ bib | .pdf ]
[22]	Radermacher, Franz-Joseph and Schaal, Markus and Schnittger, Stephan. DELFI - Durchgängige ELektronische FahrplanInformation. Projektträger Bodengebundene Verkehrstechnologien im Auftrag des BMV, Referat A 24, und des BMBF, Referat 621, Köln, Germany, 1998. [ bib | .pdf ]
[23]	Markus Schaal. Verkehrsmodellierung. Diplomarbeit, Fakultät Informatik, Univ., Stuttgart, 1996. Diplomarbeit Nr. 1373. [ bib | .pdf ]
[24]	Frank Amos, Karsten Jung, Bernd Kawetzki, Wilfried Kuhn, Oliver Pertler, Ralf Reißing, and Markus Schaal. Abschlußbericht der Projektgruppe Genetische Algorithmen. Technical Report FK 1/95, Dept. Formal Concepts, Faculty of Computer Science, University of Stuttgart, Stuttgart, Germany, 1995. german. [ bib ]
[25]	Frank Amos, Kurt Jaeger, Karsten Jung, Bernd Kawetzki, Wilfried Kuhn, Oliver Pertler, Ralf Reißing, and Markus Schaal. Zwischenbericht der Projektgruppe Genetische Algorithmen. Technical Report FK 2/94, Dept. Formal Concepts, Faculty of Computer Science, University of Stuttgart, Stuttgart, Germany, 1994. german. [ bib ]