Information Systems Group

― Knowledge Representation and Reasoning

Giorgio Stefanoni

Research Student

Biography

I studied applied computer science at the Free University of Bozen-Bolzano. Under the supervision of Prof. Werner Nutt and Dr Maria Keet, I graduated with first class honours (110 cum laude) in 2009. In my thesis project, I designed and implemented a prototypical web interface for visually querying ontology-enriched biological databases through ontologies over a Web interface. After my Bachelor, I attended the European Master in Computational Logic. In the first year of the program, I studied at the Free University of Bozen-Bolzano and, under the supervision of Prof. Diego Calvanese, I started a project on explaining query answers in the Description Logic DL-Lite. In the second year of the program, I continued working on this project in Vienna at the Technische Universitaet Wien under the joint-supervision of Dr. Magdalena Ortiz, Dr. Mantas Simkus, and Prof. Thomas Eiter. In August 2011, I graduated with first class honours.

Currently, I am a doctoral student at the Department of Computer Science, University of Oxford. I am a member of the Knowledge Representation Group and, under the joint-supervision of Dr. Boris Motik and Prof. Ian Horrocks, I am working on query answering in the EL profile of OWL2.

Recent Publications

Introducing Nominals to the Combined Query Answering Approaches for EL. Giorgio Stefanoni‚ Boris Motik and Ian Horrocks. In AAAI 2013. To appear.

Reasoning about Explanations for Negative Query Answers in DL-Lite. Diego Calvanese, Magdalena Ortiz, Mantas Simkus, and Giorgio Stefanoni. J. of Artificial Intelligence Research. 2013. To appear.

Small Datalog Query Rewritings for EL. Giorgio Stefanoni‚ Boris Motik and Ian Horrocks. In Description Logics. 2012.

The Complexity of Explaining Negative Query Answers in DL−Lite. Diego Calvanese‚ Magdalena Ortiz‚ Mantas Simkus and Giorgio Stefanoni. Proc. of the 13th Int. Conf. on the Principles of Knowledge Representation and Reasoning (KR 2012).

The Complexity of Conjunctive Query Abduction in DL−Lite. Diego Calvanese‚ Magdalena Ortiz‚ Mantas Simkus and Giorgio Stefanoni In Description Logics. 2011.

Name

Giorgio Stefanoni

Posts

Research Student

Contact Information

Wolfson Building, Parks Road, Oxford OX1 3QD

News

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".