Jonas Halvorsen, PhD

I am a research scientist at the Norwegian Defence Research Establishment (FFI). My research interests include federation of graph queries, automated reasoning, logic programing, and knowledge graphs. I did my PhD at the University of Oslo, with the thesis topic “Sound and complete query federation of SPARQL BGPs”, and did my MSc in Artificial Intelligence (Knowledge Representation and Reasoning) at the University of Edinburgh.

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Publications

For up-to-date information, check Google Scholar.

• Halvorsen, Jonas, and Audun Stolpe. “On the size of intermediate results in the federated processing of SPARQL BGPs.” Journal of Web Semantics 51 (2018): 20-38. DOI: 10.1016/j.websem.2018.06.001 (pre-print)
• Halvorsen, Jonas, and Audun Stolpe. “Towards practical federation of BGPs in the presence of blank nodes.” Proceedings of the 8th International Conference on Web Intelligence, Mining and Semantics. ACM, 2018. DOI: 10.1145/3227609.3227644 (pre-print)
• Stolpe, Audun, and Jonas Halvorsen. “Distributed query processing in the presence of blank nodes.” Semantic Web 8.6 (2017): 1001-1021. DOI: 10.3233/SW-160250 (pre-print)
• Stolpe, Audun, Jonas Halvorsen, and Bjørn Jervell Hansen. “Supporting Evacuation Missions with Ontology-Based SPARQL Federation.” STIDS. 2013. link