Information Systems Group

― Knowledge Representation and Reasoning

Clemens Kupke

Research Assistant

Biography

I joined the ISG group in April 2011. My research interests lie in logic in computer science, coalgebraic semantics and knowledge representation. I obtained my PhD in 2006 at the University of Amsterdam (thesis title: Finitary coalgebraic logics). My supervisors were Alexander Kurz, Jan Rutten and Yde Venema. Since my PhD I have been working as researcher, first at the CWI Amsterdam, then at Imperial College London. Both in Amsterdam and London I have been lecturing (parts of) several courses on modal logic and automata theory. Furthermore I co-supervised the PhD thesis of Helle Hvid Hansen and a Master's thesis. I am one of the initiators of the Logic Seminar at Imperial and of an international workshop series that is concerned with the connections between Algebra, Coalgebra and Proof Theory.

In Oxford I am working within the ExODA project where I am studying query answering over databases relative to a given set of ontological constraints. These constraints are typically specified in Datalog± or some description logic formalism. The results obtained so far concern the application of so-called acyclicity conditions for query answering relative to DL-constraints and the extension of Datalog± with nonmonotonic negation in order to obtain a richer, more expressive contstraint language.

Recent Publications


Knowledge Representation


Equality-Friendly Well-Founded Semantics and Applications to Description Logics. Georg Gottlob, André Hernich, Clemens Kupke and Thomas Lukasiewicz. Description Logics 2012.

Equality-Friendly Well-Founded Semantics and Applications to Description Logics. Georg Gottlob, André Hernich, Clemens Kupke and Thomas Lukasiewicz. In J. Hoffmann and B. Selman, editors, Proceedings of the 26th National Conference on Artificial Intelligence (AAAI 2012), Toronto, Ontario, Canada, July 2012. AAAI Press. 2012.

Acyclicity Conditions and their Application to Query Answering in Description Logics. Bernardo Cuenca Grau, Ian Horrocks, Markus Krötzsch, Clemens Kupke, Despoina Magka, Boris Motik and Zhe Wang. KR 2012



Coalgebra & Logic


Minimization via Duality. N. Bezhanishvili, C. Kupke and P. Panangaden. Proceedings of Wollic 2012.

On the Final Coalgebra of Automatic Sequences. Clemens Kupke, Jan Rutten, Logic and Program Semantics 2012: 149-164

Coalgebraic semantics of modal logics: An overview. Clemens Kupke and Dirk Pattinson. In Theoretical Computer Science. Vol. 412. No. 38. Pages 5070-5094. 2011.

Exptime Tableaux for the Coalgebraic μ-Calculus. Corina Cirstea, Clemens Kupke and Dirk Pattinson. In Logical Methods in Computer Science. Vol. 7. No. 3. 2011.


Please also see my DBLP entry.

Name

Clemens Kupke

Posts

Research Assistant

Projects

ExODA

News

3 Paper accepted in AAAI'18

Three papers co-authored by the KRR group have been accepted in AAAI'18:
- "Stream Reasoning in Temporal Datalog" by A. Ronca, M. Kaminski, B. Cuenca Grau, B. Motik, and I. Horrocks;
- "Optimised Maintenance of Datalog Materialisations" by P. Hu, B. Motik, and I. Horrocks; and
- "Goal-Driven Query Answering for Existential Rules with Equality" by M. Benedikt, B. Motik, and E. Tsamoura.

Professor Ian Horrocks is a new honorary doctorate at University of Oslo, Faculty of Mathematics and Natural Sciences

Professor Ian Horrocks received an honorary doctorate from the University of Oslo.

Best paper award at IJCAI'17

The paper entitled "Foundations of Declarative Data Analysis Using Limit Datalog Programs" and authored by M. Kaminski, B. Cuenca Grau, B. Motik, E. V. Kostylev, and I. Horrocks received the best paper award at the 26th International Joint Conference on Artificial Intelligence (IJCAI'17).

3 papers accepted in IJCAI'17

Three papers co-authored by the KRR group have been accepted in IJCAI'17:
- "Query Reformulation: Theory and Practice" by M. Benedikt, E. V. Kostylev, F. Mogavero, and E. Tsamoura;
- "Foundations of Declarative Data Analysis Using Limit Datalog Programs" by M. Kaminski, B. Cuenca Grau, B. Motik, E. V. Kostylev, and I. Horrocks; and
- "The Bag Semantics of Ontology-Based Data Access" by C. Nikolaou, E. V. Kostylev, G. Konstantinidis, M. Kaminski, B. Cuenca Grau, and I. Horrocks.

Paper accepted in PODS'17

The paper entitled "Benchmarking the chase" authored by Michael Benedikt, George Konstantinidis, Giansalvatore Mecca, Boris Motik, Paolo Papotti, Donatello Santoro, and Efthymia Tsamoura has been accepted in PODS'17.

Andrew Bate defends his PhD Thesis

Andrew Bate has successfully defended his PhD Thesis on Consequence Based Reasoning. Congratulations to Dr. Andrew Bate!

Best applications paper award at ISWC'16

Our paper entitled "Semantic Technologies for Data Analysis in Health Care" received the Best Applications Paper Award at the International Semantic Web Conference (ISWC 2016).

4 papers accepted in ISWC'16

Four papers authored by the KRR group have been accepted in the International Semantic Web Conference (ISWC 2016).

Best paper award at ICDT'16

Mark Kaminski and Egor Kostylev received the best paper award at ICDT 2016 for their paper entitled "Beyond Well-Designed SPARQL".