Dennis Heinrich, M.Sc.

- Wissenschaftlicher Mitarbeiter -

 

Institut für Informationssysteme
Universität zu Lübeck
Ratzeburger Allee 160 ( Gebäude 64 - 2.OG )
D-23562 Lübeck

Telefon: +49 451 3101 5705
Fax : +49 451 3101 5704
email : Öffnet ein Fenster zum Versenden einer E-Mail E-Mail an Dennis Heinrich
 
 
 

Curriculum Vitae

Publikationen

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, Runner-Up Paper Award
    BibTeX
  • 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
    DOI Website BibTeX
  • 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
    Website BibTeX
nach oben

2016

  • Sven Groppe, Dennis Heinrich, Christopher Blochwitz, Thilo Pionteck: Constructing Large-Scale Semantic Web Indices for the Six RDF Collation Orders
    in: Open Journal of Big Data (OJBD), 2016, Vol.2, (1), p.11-25, ISSN 2365-029X
    Website BibTeX
  • 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
    Website BibTeX
nach oben

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
    Website BibTeX
  • 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
    BibTeX
  • 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
    Website BibTeX:
    @Article{OJDB_2015v2i1n03_Groppe,
            title     = {PatTrieSort - External String Sorting based on Patricia Tries},
            author    = {Sven Groppe and Dennis Heinrich and Stefan Werner and Christopher Blochwitz and Thilo Pionteck},
            journal   = {Open Journal of Databases (OJDB)},
            issn      = {2199-3459},
            year      = {2015},
            volume    = {2},
            number    = {1},
            pages     = {36--50},
            url       = {http://www.ronpub.com/publications/OJDB_2015v2i1n03_Groppe.pdf},
            publisher = {RonPub},
            bibsource = {RonPub},
            abstract = {External merge sort belongs to the most efficient and widely used algorithms to sort big data: As much data as fits inside is sorted in main memory and afterwards swapped to external storage as so called initial run. After sorting all the data in this way block-wise, the initial runs are merged in a merging phase in order to retrieve the final sorted run containing the completely sorted original data. Patricia tries are one of the most space-efficient ways to store strings especially those with common prefixes. Hence, we propose to use patricia tries for initial run generation in an external merge sort variant, such that initial runs can become large compared to traditional external merge sort using the same main memory size. Furthermore, we store the initial runs as patricia tries instead of lists of sorted strings. As we will show in this paper, patricia tries can be efficiently merged having a superior performance in comparison to merging runs of sorted strings. We complete our discussion with a complexity analysis as well as a comprehensive performance evaluation, where our new approach outperforms traditional external merge sort by a factor of 4 for sorting over 4 billion strings of real world data.}
        }
  • 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
    DOI BibTeX
  • 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
    BibTeX
  • 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
    DOI BibTeX
nach oben

2014

  • 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
    Website BibTeX
  • 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
    Website BibTeX
  • 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
    DOI BibTeX
nach oben