Dr.-Ing. Stefan Werner

- Research Assistant -
Institute of Information Systems
Universität zu Lübeck
Ratzeburger Allee 160 ( Gebäude 64 - 2.OG )
D-23562 Lübeck
Curriculum Vitae
- March 2011 - Diploma in Computer Science (comparable to Master of Computer Science) at the University of Luebeck
- April 2011 - October 2016 - Research Assistant at the Institute of Information Systems of the University of Luebeck
Research Interests
- FPGAs / Reconfigurable Computing
- Multi-Query Optimization
- Semantic Web (indexing, query processing)
- Distributed algorithms in wireless sensor networks
Publications
2020
- Dennis Heinrich, Stefan Werner, Christopher Blochwitz, Thilo Pionteck, Sven Groppe: Hardware-aided update acceleration in a hybrid Semantic Web database system
in: The Journal of Supercomputing, 2020, Vol.76, (10), p.7961-7984
2017
- Dennis Heinrich, Stefan Werner, Christopher Blochwitz, Thilo Pionteck, Sven Groppe: Search & Update Optimization of a B+ Tree in a Hardware aided Semantic Web Database System
in: Proceedings of the 7th International Conference on Emerging Databases (EDB), 2017, Springer, Lecture Notes in Electrical Engineering (LNEE), Vol.461, Runner-Up Paper Award, p.172-182 - Stefan Werner, Dennis Heinrich, Thilo Pionteck, Sven Groppe: Semi-static operator graphs for accelerated query execution on FPGAs
in: Microprocessors and Microsystems, 2017, Vol.53, p.178 - 189 - Christopher Blochwitz, Julian Wolff, Jan Moritz Joseph, Stefan Werner, Dennis Heinrich, Sven Groppe, Thilo Pionteck: Hardware-Accelerated Radix-Tree Based String Sorting for Big Data Applications
in: Architecture of Computing Systems (ARCS 2017) - 30th International Conference, 2017, 3.-6. April, Vienna, Austria, LNCS, Vol.10172, p.47-58 - Stefan Werner: Hybrid Architecture for Hardware-accelerated Query Processing in Semantic Web Databases based on Runtime Reconfigurable FPGAs
Universität zu Lübeck, 2017, PhD Thesis
2016
- Stefan Werner, Dennis Heinrich, Sven Groppe, Christopher Blochwitz, Thilo Pionteck: Runtime Adaptive Hybrid Query Engine based on FPGAs
in: Open Journal of Databases (OJDB), 2016, Vol.3, (1), p.21-41
2015
- Sven Groppe, Dennis Heinrich, Stefan Werner: Distributed Join Approaches for W3C-Conform SPARQL Endpoints
in: Open Journal of Semantic Web (OJSW), 2015, Vol.2, (1), p.30-52 - Rico Backasch, Gerald Hempel, Thilo Pionteck, Sven Groppe, Stefan Werner: An Architectural Template for Composing Application Specific Datapaths at Runtime
in: International Conference on ReConFigurable Computing and FPGAs (ReConFig), 2015, December 7 - 9, Cancun, Mexico - Christopher Blochwitz, Jan Moritz Joseph, Thilo Pionteck, Rico Backasch, Stefan Werner, Dennis Heinrich, Sven Groppe: An optimized Radix-Tree for hardware-accelerated index generation for Semantic Web Databases
in: International Conference on ReConFigurable Computing and FPGAs (ReConFig), 2015, December 7 - 9, Cancun, Mexico - Sven Groppe, Dennis Heinrich, Stefan Werner, Christopher Blochwitz, Thilo Pionteck: PatTrieSort - External String Sorting based on Patricia Tries
in: Open Journal of Databases (OJDB), 2015, Vol.2, (1), p.36-50 - Stefan Werner, Dennis Heinrich, Jannik Piper, Sven Groppe, Rico Backasch, Christopher Blochwitz, Thilo Pionteck: Automated Composition and Execution of Hardware-accelerated Operator Graphs
in: Proceedings of the 10th International Symposium on Reconfigurable Communication-centric Systems-on-Chip (ReCoSoC 2015), 2015, June 29 - July 1, IEEE, Bremen, Germany - Dennis Heinrich, Stefan Werner, Marc Stelzner, Christopher Blochwitz, Thilo Pionteck, Sven Groppe: Hybrid FPGA Approach for a B+ Tree in a Semantic Web Database System
in: Proceedings of the 10th International Symposium on Reconfigurable Communication-centric Systems-on-Chip (ReCoSoC 2015), 2015, June 29 - July 1, IEEE, Bremen, Germany - Stefan Werner, Dennis Heinrich, Marc Stelzner, Volker Linnemann, Thilo Pionteck, Sven Groppe: Accelerated join evaluation in Semantic Web databases by using FPGAs
in: Concurrency and Computation: Practice and Experience, 2015, May 18, Vol.28, (7), p.2031-2051
2014
- Rico Backasch, Gerald Hempel, Sven Groppe, Stefan Werner, Thilo Pionteck: Identifying Homogenous Reconfigurable Regions in Heterogeneous FPGAs for Module Relocation
in: International Conference on ReConFigurable Computing and FPGAs (ReConFig), 2014, December 8 - 10, Cancun, Mexico - Sven Groppe, Johannes Blume, Dennis Heinrich, Stefan Werner: A Self-Optimizing Cloud Computing System for Distributed Storage and Processing of Semantic Web Data
in: Open Journal of Cloud Computing (OJCC), 2014, Vol.1, (2), p.1-14 - Sven Groppe, Thomas Kiencke, Stefan Werner, Dennis Heinrich, Marc Stelzner, Le Gruenwald: P-LUPOSDATE: Using Precomputed Bloom Filters to Speed Up SPARQL Processing in the Cloud
in: Open Journal of Semantic Web (OJSW), 2014, Vol.1, (2), p.25-55 - Stefan Werner, Dennis Heinrich, Marc Stelzner, Sven Groppe, Rico Backasch, Thilo Pionteck: Parallel and Pipelined Filter Operator for Hardware-Accelerated Operator Graphs in Semantic Web Databases
in: Proceedings of the 14th IEEE International Conference on Computer and Information Technology (CIT 2014), 2014, September 11 - 13, IEEE, Xi´an, China, Copyright: IEEE
2013
- Stefan Werner, Sven Groppe, Volker Linnemann, Thilo Pionteck: Hardware-accelerated Join Processing in Large Semantic Web Databases with FPGAs
in: Proceedings of the 2013 International Conference on High Performance Computing & Simulation (HPCS 2013), 2013, July 1 - 5, IEEE, Helsinki, Finland, p.131 - 138, Copyright: IEEE - Sven Groppe, Björn Schütt, Stefan Werner: Eliminating the XML Overhead in Embedded XML Languages
in: Proceedings of the 28th ACM Symposium on Applied Computing (ACM SAC 2013), 2013, March 18 - 22, ACM, Coimbra, Portugal, Copyright: ACM
2011
- Sven Groppe, Jinghua Groppe, Stefan Werner, Matthias Samsel, Florian Kalis, Kristina Fell, Peter Kliesch, Markus Naklah: Using a Streaming SPARQL Evaluator for Monitoring eBay Auctions
in: International Journal of Web Applications (IJWA), 2011, Vol.3, (4), p.166-178, Copyright: dline - Stefan Werner, Christoph Reinke, Sven Groppe, Volker Linnemann: Adaptive Service Migration in Wireless Sensor Networks
in: Proceedings of the 12th International Conference on Parallel and Distributed Computing, Applications and Technologies (PDCAT-2011), 2011, October 20 - 22, CPS, Gwangju, Korea, p.334-341, Copyright: IEEE - Sven Groppe, Jinghua Groppe, Stefan Werner, Matthias Samsel, Florian Kalis, Kristina Fell, Peter Kliesch, Markus Nakhlah: Monitoring eBay Auctions by querying RDF Streams
in: Proceedings of the Sixth International Conference on Digital Information Management (ICDIM 2011), 2011, September 26 - 28, CPS, Trinity College, The University of Melbourne, Australia, p.223-228, Copyright: IEEE - Christoph Reinke, Nils Hoeller, Stefan Werner, Sven Groppe, Volker Linnemann: Analysis and Comparison of Concurrency Control Protocols for Wireless Sensor Networks
in: Proceedings of the 3rd International Workshop on Performance Control in Wireless Sensor Networks (PWSN 2011) in conjunction with the 7th IEEE International Conference on Distributed Computing in Sensor Systems (IEEE DCOSS 11), 2011, June 29, IEEE, Barcelona, Spain, p.1-6, Copyright: IEEE - Christoph Reinke, Nils Hoeller, Stefan Werner, Sven Groppe, Volker Linnemann: Consistent Service Migration in Wireless Sensor Networks
in: Proceedings of the 2011 International Conference on Wireless and Optical Communications (ICWOC 2011 - including ICIME 2011), 2011, May 21 - 22, IEEE, Zhengzhou, China, p.278-285, Copyright: IEEE