Publikationsliste Prof. Dr. Ralf Schenkel

 

Books

[1] Andreas Harth, Katja Hose, and Ralf Schenkel, editors. Linked Data Management. Chapman
& Hall / CRC, 2014.
[2] Shlomo Geva, Jaap Kamps, and Ralf Schenkel, editors. Focused Retrieval and Evaluation:
10th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX
2011), volume 7424 of Lecture Notes in Computer Science. Springer, 2012.
[3] Shlomo Geva, Jaap Kamps, Ralf Schenkel, and Andrew Trotman, editors. 9th International
Workshop of the Inititative for the Evaluation of XML Retrieval, INEX 2010, volume
6932 of Lecture Notes in Computer Science, Vught, The Netherlands, 2011. Springer.
[4] Henk Blanken, Torsten Grabs, Hans-Jorg Schek, Ralf Schenkel, and Gerhard Weikum,
editors. Intelligent Search on XML Data : Applications, Languages, Models, Implementations,
and Benchmarks, volume 2818 of Lecture Notes in Computer Science. Springer,
Berlin, Germany, 2003.

 

Scholarly Book Chapters

[1] Ralf Schenkel. Semistructured data search evaluation. In Nicola Ferro, editor, PROMISE
Winter School 2013: Bridging between Information Retrieval and Databases, volume 8173
of Lecture Notes in Computer Science. Springer, Berlin, 2014.
[2] Katja Hose, Ralf Schenkel, Martin Theobald, and GerhardWeikum. Database foundations
for scalable RDF processing. In Reasoning Web, 7th International Summer School 2011.
Springer, 2011.
[3] Ralf Schenkel. Locking granularity and lock types. In Ling Liu and M. Tamer  Oszu,
editors, Encyclopedia of Database Systems, pages 1641{1643. Springer, Berlin, 2009.
[4] Amelie Marian, Ralf Schenkel, and Martin Theobald. Ranked XML processing. In Ling
Liu and Tamer M.  Oszu, editors, Encyclopedia of Database Systems, pages 2325{2332.
Springer, Berlin, 2009.
[5] Ralf Schenkel and Martin Theobald. Integrated DB&IR semi-structured text retrieval.
In Ling Liu and M. Tamer  Oszu, editors, Encyclopedia of Database Systems, pages 1543{
1546. Springer, Berlin, 2009.
[6] Ralf Schenkel, Anja Theobald, and Gerhard Weikum. Ontology-enabled XML search. In
Henk Blanken, Torsten Grabs, Hans-Jorg Schek, Ralf Schenkel, and Gerhard Weikum,
editors, Intelligent Search on XML Data : Applications, Languages, Models, Implementations,
and Benchmarks, volume 2818 of Lecture Notes in Computer Science, chapter 8,
pages 119{131. Springer, Berlin, Germany, 2003.
[7] Martin Theobald, Ralf Schenkel, and Gerhard Weikum. Classi cation and focused crawling
for semistructured data. In Henk Blanken, Torsten Grabs, Hans-Jorg Schek, Ralf
Schenkel, and Gerhard Weikum, editors, Intelligent Search on XML Data : Applications,
Languages, Models, Implementations, and Benchmarks, volume 2818 of Lecture Notes in
Computer Science, chapter 10, pages 145{157. Springer, Berlin, Germany, 2003.
1

Articles in Journals

[1] Marcin Sydow, Mariusz Pikula, and Ralf Schenkel. The notion of diversity in graphical
entity summarisation on semantic knowledge graphs. Intelligent Information Systems,
41(2):109{149, 2013.
[2] Andreas Broschart and Ralf Schenkel. High-performance processing of text queries with
tunable pruned term and term pair indexes. Transactions on Information Systems,
30(1):5:1{5:32, February 2012.
[3] Thomas Neumann, Matthias Bender, Sebastian Michel, Ralf Schenkel, Peter Trianta llou,
and Gerhard Weikum. Distributed top-k aggregation queries at large. Distributed and
Parallel Databases, 26(1):3{27, August 2009.
[4] Martin Theobald, Holger Bast, Debapriyo Majumdar, Ralf Schenkel, and Gerhard
Weikum. TopX: Ecient and versatile top-k query processing for semistructured data.
VLDB Journal, 17(1):81{115, January 2008.
[5] Ralf Schenkel, Anja Theobald, and Gerhard Weikum. Semantic similarity search on
semistructured data with the XXL search engine. Information Retrieval, 8(4):521{545,
December 2005.

 

Articles in Refereed Conference Proceedings

[1] Ste en Metzger, Ralf Schenkel, and Marcin Sydow. Aspect-based similar entity search
in semantic knowledge graphs with diversity-awareness and relaxation. In International
Conference on Web Intelligence, 2014.
[2] Luis Galarraga, Katja Hose, and Ralf Schenkel. Partout: A distributed engine for ecient
RDF processing. In International World Wide Web Conference, 2014.
[3] Ste en Metzger, Ralf Schenkel, and Marcin Sydow. QBEES: Query by entity examples.
In 22nd ACM International Conference on Information and Knowledge Management
(CIKM 2013), San Francisco, USA, 2013.
[4] Tom Crecelius and Ralf Schenkel. Pay-as-you-go maintenance of precomputed nearest
neighbors in large graphs. In 21st ACM International Conference on Information and
Knowledge Management (CIKM 2012), Maui, USA, 2012. ACM.
[5] Avishek Anand, Srikanta Bedathur, Klaus Berberich, and Ralf Schenkel. Index maintenance
for time-travel text search. In Proceedings of the 35th Annual International ACM
SIGIR Conference on Research & Development on Information Retrieval (SIGIR 2012),
Portland, Oregon, 2012. ACM.
[6] Besnik Fetahu and Ralf Schenkel. Retrieval evaluation on focused tasks. In Proceedings
of the 35th International ACM SIGIR Conference on Research and Development in
Information Retrieval (SIGIR 2012), Portland, Oregon, 2012. ACM.
[7] Rene Jakel, Ste en Metzger, Jason Milad Daivandy, Katja Hose, Dennis Hunich, Ralf
Schenkel, and Bernd Schuller. Interactive information extraction based on distributed
data management for German grid projects. In EGI Community Forum 2012 / EMI
Second Technical Conference (EGICF12-EMITC2), Proceedings of Science, pages 1{10,
Munich, Germany, 2012. Proceedings of Science.
[8] Ste en Metzger, Shady Elbassuoni, Katja Hose, and Ralf Schenkel. S3K: Seeking
statement-supporting top-k witnesses. In 20th ACM Conference on Information and
Knowledge Management (CIKM 2011), Glasgow, UK, 2011.
2
[9] Andreas Schwarte, Peter Haase, Katja Hose, Ralf Schenkel, and Michael Schmidt. FedX:
Optimization techniques for federated query processing on linked data. In 10th International
Semantic Web Conference (ISWC 2011), Bonn, Germany, 2011.
[10] Avishek Anand, Srikanta Bedathur, Klaus Berberich, and Ralf Schenkel. Temporal index
sharding for space-time eciency in archive search. In 34th ACM SIGIR Conference on
Research and Development in Information Retrieval (SIGIR 2011), 2011.
[11] Andreas Broschart and Ralf Schenkel. A novel hybrid index structure for ecient text
retrieval. In 34th ACM SIGIR Conference on Research and Development in Information
Retrieval (SIGIR 2011), 2011.
[12] Christian Politz and Ralf Schenkel. Learning to rank under tight budget constraints. In
34th ACM SIGIR Conference on Research and Development in Information Retrieval
(SIGIR 2011), 2011.
[13] Marcin Sydow, Mariusz Pikula, and Ralf Schenkel. To diversify or not to diversify
entity summaries on RDF knowledge graphs? In 19th International Symposium on
Methodologies for Intelligent Systems (ISMIS 2011). Springer, 2011.
[14] Avishek Anand, Srikanta Bedathur, Klaus Berberich, and Ralf Schenkel. Ecient temporal
keyword queries over versioned text. In Proceedings of the 19th ACM Conference
on Information and Knowledge Management (CIKM 2010), Toronto, Canada, 2010.
[15] Ralf Schenkel. Temporal shingling for version identi cation in web archives. In Proceedings
of the 32nd European Conference on Information Retrieval (ECIR 2010), Milton
Keynes, UK, 2010. Springer.
[16] Omar Alonso, Ralf Schenkel, and Martin Theobald. Crowdsourcing assessments for
XML ranked retrieval. In Proceedings of the 32nd European Conference on Information
Retrieval (ECIR 2010), Milton Keynes, UK, 2010. Springer.
[17] Andreas Broschart, Klaus Berberich, and Ralf Schenkel. Evaluating the potential of
explicit phrases for retrieval quality. In Proceedings of the 32nd European Conference on
Information Retrieval (ECIR 2010), Milton Keynes, UK, 2010. Springer.
[18] Marcin Sydow, Mariusz Pikula, Ralf Schenkel, and Adam Siemion. Entity summarisation
with limited edge budget on knowledge graphs. In Computational Linguistics
Applications (CLA'10), Wisla, Poland, October 2010.
[19] Michal Shmueli-Scheuer, Chen Li, Yosi Mass, Haggai Roitman, Ralf Schenkel, and Gerhard
Weikum. Best e ort top-k query processing under budgetary constraints. In Yannis
Ioannidis, Dik Lee, and Raymong Ng, editors, Proceedings of the 25th IEEE International
Conference on Data Engineering (ICDE 2009), pages 928{939, Shanghai, China,
2009. IEEE.
[20] Avishek Anand, Srikanta Bedathur, Klaus Berberich, Ralf Schenkel, and Christos Tryfonopoulos.
EverLast: A distributed architecture for preserving the Web. In Proceedings
of the Joint Conference on Digital Libraries (JCDL 2009), pages 331{340, Austin, Texas,
2009. ACM.
[21] Shady Elbassuoni, Maya Ramanath, Ralf Schenkel, Marcin Sydow, and Gerhard
Weikum. Language-model-based ranking for queries on RDF-graphs. In Wesley Chu,
Xiaohua Hu, and Jimmy Lin, editors, Proceedings of the 18th ACM Conference on Information
and Knowledge Management (CIKM 2009), pages 977{986, Hongkong, China,
2009. ACM.
3
[22] Ralf Schenkel, Tom Crecelius, Mouna Kacimi, Sebastian Michel, Thomas Neumann,
Josiane Xavier Parreira, and Gerhard Weikum. Ecient top-k querying over socialtagging
networks. In Proceedings of the 31st Annual International ACM SIGIR Conference
on Research & Development on Information Retrieval (SIGIR 2008), pages 523{
530, Singapore, Singapore, 2008. ACM.
[23] Thomas Neumann, Matthias Bender, Sebastian Michel, Ralf Schenkel, Peter Trianta llou,
and Gerhard Weikum. Optimizing distributed top-k queries. In Proceedings of the
9th International Conference on Web Information Systems (WISE 2008), volume 5175
of Lecture Notes in Computer Science, pages 337{349, Auckland, New Zealand, 2008.
Springer.
[24] Andreas Broschart and Ralf Schenkel. Proximity-aware scoring for XML retrieval. In
Proceedings of the 31st Annual International ACM SIGIR Conference on Research &
Development on Information Retrieval (SIGIR 2008), Singapore, 2008.
[25] Ralf Schenkel, Andreas Broschart, Seungwon Hwang, and Gerhard Weikum. Ecient
text proximity search. In 14th String Processing and Information Retrieval Symposium
(SPIRE 2007), Santiago, Chile, 2007. Springer.
[26] Martin Theobald, Ralf Schenkel, and GerhardWeikum. Topx - ecient and versatile topk
query process-ing for text, semistructured, and structured data. In Alfons Kemper,
Harald Schoning, Thomas Rose, Matthias Jarke, Thomas Seidl, Christoph Quix, and
Christoph Brochhaus, editors, 12. GI-Fachtagung fur Datenbanksysteme in Business,
Technologie und Web (BTW 2007), volume 103 of Lecture Notes in Informatics, pages
475{485, Aachen, Germany, 2007. Gesellschaft fur Informatik.
[27] Ralf Schenkel, Fabian Suchanek, and Gjergji Kasneci. YAWN: A semantically annotated
Wikipedia XML corpus. In Alfons Kemper, Harald Schoning, Thomas Rose,
Matthias Jarke, Thomas Seidl, Christoph Quix, and Christoph Brochhaus, editors, 12.
GI-Fachtagung fur Datenbanksysteme in Business, Technologie und Web (BTW 2007),
volume 103 of Lecture Notes in Informatics, pages 277{291, Aachen, Germany, 2007.
Gesellschaft fur Informatik.
[28] Holger Bast, Debapriyo Majumdar, Martin Theobald, Ralf Schenkel, and Gerhard
Weikum. IO-Top-k: Index-optimized top-k query processing. In Gustavo Alonso et al.,
editors, 32nd International Conference on Very Large Data Bases (VLDB 2006), pages
475{486, September 2006. Acceptance ratio 1:7.
[29] Ralf Schenkel and Martin Theobald. Structural feedback for keyword-based XML retrieval.
In Mounia Lalmas, Andy MacFarlane, Stefan M. Rger, Theodora Tombros,
Anastasios Tsikrika, and Alexei Yavlinsky, editors, 28th European Conference on Information
Retrieval (ECIR 2006), pages 326{337, London, UK, April 2006. Acceptance
ratio 1:5.
[30] Ralf Schenkel and Martin Theobald. Feedback-driven structural query expansion for
ranked retrieval of XML data. In Yannis Ioannidis, Marc H. Scholl, Joachim W. Schmidt,
Florian Matthes, Mike Hatzopoulos, Klemens Boehm, Alfons Kemper, Torsten Grust,
and Christian Boehm, editors, 10th International Conference on Extending Database
Technologies (EDBT 2006), pages 331{348, Munich, Germany, March 2006. Acceptance
ratio 1:6.
[31] Martin Theobald, Ralf Schenkel, and Gerhard Weikum. An ecient and versatile query
engine for TopX search. In Klemens Bohm, Christian S. Jensen, Laura M. Haas, Martin
L. Kersten, Per-Ake Larson, and Beng Chin Ooi, editors, 31st International Conference
on Very Large Databases (VLDB 2005), Trondheim, Norway, September 2005.
ACM. Acceptance ratio 1:6.
4
[32] Jens Graupmann, Ralf Schenkel, and Gerhard Weikum. The SphereSearch Engine for
uni ed ranked retrieval of heterogeneous XML and Web documents. In Klemens Bohm,
Christian S. Jensen, Laura M. Haas, Martin L. Kersten, Per-Ake Larson, and Beng Chin
Ooi, editors, 31st International Conference on Very Large Databases (VLDB 2005),
Trondheim, Norway, September 2005. ACM. Acceptance ratio 1:6.
[33] Martin Theobald, Ralf Schenkel, and Gerhard Weikum. Ecient and self-tuning incremental
query expansion for top-k query processing. In Ricardo A. Baeza-Yates, Nivio
Ziviani, Gary Marchionini, Alistair Mo at, and John Tait, editors, 28th Annual International
ACM SIGIR Conference on Research and Development in Information Retrieval
(SIGIR 2005), Salvador, Brazil, August 2005. Sheridan Printing. Acceptance ratio 1:5.
[34] Ralf Schenkel, Anja Theobald, and Gerhard Weikum. Ecient creation and incremental
maintenance of the HOPI index for complex XML document collections. In 21st International
Conference on Data Engineering (ICDE 2005), pages 360{371, Tokyo, Japan,
April 2005. IEEE Computer Society. Acceptance ratio 1:8.
[35] Gerhard Weikum, Jens Graupmann, Ralf Schenkel, and Martin Theobald. Towards a
statistically semantic web (invited paper). In Paolo Atzeni, Hongjun Lu, Shuigeng Zhou,
and TokWang Ling, editors, 23rd International Conference on Conceptual Modeling (ER
2004), volume 3288 of Lecture Notes in Computer Science, pages 3{17, Shanghai, China,
November 2004. Springer.
[36] Martin Theobald, Gerhard Weikum, and Ralf Schenkel. Top-k query evaluation with
probabilistic guarantees. In Mario A. Nascimento, M. Tamer  Ozsu, Donald Kossmann,
Renee J. Miller, Jose A. Blakeley, and K. Bernhard Schiefer, editors, 30th International
Conference on Very Large Data Bases (VLDB 2004), pages 648{659, Toronto, Canada,
September 2004. Morgan Kaufmann. Acceptance ratio 1:6.
[37] Kathrin Roberts, Frank Mucklich, Ralf Schenkel, and Gerhard Weikum. An information
system for material microstructures. In Michael Hatzopoulos and Yannis Manolopoulos,
editors, 16th International Conference on Scienti c and Statistical Database Management
(SSDBM 2004), pages 329{332, Santorini Island Greece, June 2004. IEEE Computer
Society. Acceptance ratio 1:2.
[38] Ralf Schenkel, Anja Theobald, and Gerhard Weikum. HOPI: An ecient connection index
for complex XML document collections. In Elisa Bertino, Stavros Christodoulakis,
Dimitris Plexousakis, Vassilis Christophides, Manolis Koubarakis, Klemens Bohm, and
Elena Ferrari, editors, 9th International Conference on Extending Database Technology
(EDBT 2004), volume 2992 of Lecture Notes in Computer Science, pages 237{255,
Heraklion, Crete, Greece, March 2004. Springer. Acceptance ratio 1:7.
[39] Ralf Schenkel and Gerhard Weikum. Integrating snapshot isolation into transactional
federations. In Opher Etzion and Peter Scheuermann, editors, 5th IFCIS International
Conference on Cooperative Information Systems (CoopIS 2000), volume 1901 of Lecture
Notes in Computer Science, pages 90{101, Eilat, Israel, September 2000. Springer.
Articles in Refereed Workshop Proceedings
[1] Katja Hose and Ralf Schenkel. WARP: Workload-aware replication and partitioning
for RDF. In 4th International Workshop on Data Engineering meets Semantic Web
(DESWeb 2013), Brisbane, Australia, 2013.
[2] Ste en Metzger, Katja Hose, and Ralf Schenkel. Colledge - a vision of collaborative
knowledge networks. In 2nd International Workshop on Semantic Search over the Web
(SSW 2012), Istanbul, Turkey, 2012. ACM.
5
[3] Katja Hose and Ralf Schenkel. Towards bene t-based rdf source selection for SPARQL
queries. In 4th International Workshop on Semantic Web Information Management
(SWIM 2012), Scottsdale, AZ, 2012.
[4] Christian Politz and Ralf Schenkel. Robust ranking models using noisy feedback. In
Workshop "Information Retrieval Over Query Sessions" (SIR 2012) at ECIR 2012,
Barcelona, Spain, 2012.
[5] Christian Politz and Ralf Schenkel. Ranking under tight budgets. In Proceedings of
the 9th International Workshop on Text-based Information Retrieval (TIR-12), Vienna,
Austria, 2012. IEEE.
[6] Paavo Arvola, Shlomo Geva, Jaap Kamps, Ralf Schenkel, Andrew Trotman, and Johanna
Vainio. Overview of the INEX 2010 ad hoc track. In Shlomo Geva, Jaap Kamps, Ralf
Schenkel, and Andrew Trotman, editors, Proceedings of the INEX 2010 Workshop, 2010.
[7] Aleksandar Stupar, Sebastian Michel, and Ralf Schenkel. Rankreduce - processing knearest
neighbor queries on top of mapreduce. In 8th International Workshop on Large-
Scale Distributed Systems for Information Retrieval (LSDS-IR'10), Geneva, Switzerland,
2010.
[8] Marcin Sydow, Mariusz Pikula, and Ralf Schenkel. DIVERSUM: Towards diversi ed
summarisation of entities in knowledge graphs. In Francesco Guerra and Yannis Velegrakis,
editors, Proceedings of the 1st Workshop on Data Engineering meets the Semantic
Web (DeSWeb2010), Long Beach, CA, USA, 2010.
[9] Matthias Bender, Tom Crecelius, Mouna Kacimi, Sebastian Michel, Thomas Neumann,
Josiane Xavier Parreira, Ralf Schenkel, and Gerhard Weikum. Exploiting social relations
for query expansion and result ranking. In Data Engineering for Blogs, Social Media, and
Web 2.0, ICDE 2008 Workshops, pages 501{506, Cancun, Mexico, 2008. IEEE Computer
Society.
[10] Andreas Broschart, Ralf Schenkel, Martin Theobald, and Gerhard Weikum. TopX @
INEX 2007. In Norbert Fuhr, Mounia Lalmas, and Andrew Trotman, editors, Preproceedings
of the 6th International Workshop of the INitiative for the Evaluation of XML
Retrieval (INEX 2007), pages 84{93, Schlos Dagstuhl, Germany, 2007.
[11] Martin Theobald, Andreas Broschart, Ralf Schenkel, Silvana Solomon, and Gerhard
Weikum. TopX - adhoc track and feedback task. In Norbert Fuhr, Mounia Lalmas, and
Andrew Trotman, editors, Comparative Evaluation of XML Information Retrieval Systems,
5th International Workshop of the Initiative for the Evaluation of XML Retrieval,
INEX 2006, volume 4518 of Lecture Notes in Computer Science, pages 233{242, Schlo
Dagstuhl, Germany, 2007. Springer.
[12] Martin Theobald, Ralf Schenkel, and Gerhard Weikum. TopX & XXL at INEX 2005.
In Norbert Fuhr, Mounia Lalmas, Saadia Malik, and Gabriella Kazai, editors, 4th International
Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2005),
volume 3977 of Lecture Notes in Computer Science, pages 282{295. Springer, November
2005.
[13] Ralf Schenkel and Martin Theobald. Relevance feedback for structural query expansion.
In Norbert Fuhr, Mounia Lalmas, Saadia Malik, and Gabriella Kazai, editors, 4th International
Workshop of the Initiative for the Evaluation of XML Retrieval (INEX 2005),
volume 3977 of Lecture Notes in Computer Science, pages 344{357. Springer, November
2005.
6
[14] Ralf Schenkel, Anja Theobald, and Gerhard Weikum. XXL @ INEX 2003. In Norbert
Fuhr, Mounia Lalmas, and Saadia Malik, editors, 2nd International Workshop of the
Initiative for the Evaluation of XML Retrieval (INEX 2003), pages 33{40, Dagstuhl,
December 2004. INEX.
[15] Martin Theobald, Ralf Schenkel, and Gerhard Weikum. Exploiting structure, annotation,
and ontological knowledge for automatic classi cation of XML data. In Vassilis
Christophides and Juliana Freire, editors, 6th International Workshop on the Web and
Databases (WebDB 2003), pages 1{6, Beaverton, USA, June 2003. OGI School of Science
and Engineering / CSE. Acceptance ratio 1:4.
[16] Jens Graupmann and Ralf Schenkel. GeoSphereSearch: Context-aware geographic Web
search. In 3rd Workshop on Geographic Information Retrieval (GIR 2006), Seattle, WA,
USA, 2006.
[17] Jens Graupmann and Ralf Schenkel. The light-weight semantic web: Integrating information
extraction and information retrieval for heterogeneous environments. In Ranieri
Baraglia, Domenico Laforenza, and Fabrizio Silvestri, editors, SIGIR 2005 Workshop on
Heterogeneous and Distributed Information Retrieval (HDIR), Salvador, Brazil, August
2005.
[18] Jens Graupmann, Jun Cai, and Ralf Schenkel. Automatic query re nement using mined
semantic relations. In International Workshop on Challenges in Web Information Retrieval
and Integration (WIRI 2005), Tokyo, Japan, 2005. IEEE Computer Society. Acceptance
ratio 1:4.
[19] Minos Garofalakis, Ioana Manolescu, Marco Mesiti, George Mihaila, Ralf Schenkel, Bhavani
Thuraisingham, and Vasilis Vassalos. What's next in XML and databases. In
Wolfgang Lindner, Marco Mesiti, Can Turker, Yannis Tzitzikas, and Athena Vakali, editors,
EDBT 2004 Workshops PhD, DataX, PIM, P2P&DB, and ClustWeb, volume 3268
of Lecture Notes in Computer Science, pages 318{324, Heraklion, Greece, March 2004.
Springer.
[20] Ralf Schenkel. FliX: A
exible framework for indexing complex XML document collections.
In Wolfgang Lindner, Marco Mesiti, Can Turker, Yannis Tzitzikas, and Athena
Vakali, editors, EDBT 2004 Workshops PhD, DataX, PIM, P2P&DB, and ClustWeb,
volume 3268 of Lecture Notes in Computer Science, pages 240{249, Heraklion, Greece,
March 2004. Springer. Acceptance ratio 1:3.
[21] Ralf Schenkel and Gerhard Weikum. Taming the tiger: How to cope with real database
products in transactional federations for internet applications. In Gunter Saake and Kai-
Uwe Sattler, editors, GI-Workshop "Internet-Datenbanken", volume 12/2000 of Preprint,
pages 13{29, Berlin, Germany, 2000. Otto-von-Guericke-Universitat.
[22] Ralf Schenkel and Gerhard Weikum. Experiences with building a federated transaction
manager based on CORBA OTS. In Stefan Conrad, Willi Hasselbring, and Gunter
Saake, editors, 2nd International Workshop of Engineering Federated Information Systems
(EFIS '99), pages 79{94, Kuhlungsborn, Germany, 1999. in x.
[23] Ralf Schenkel, GerhardWeikum, NorbertWeienberg, and XuequnWu. Federated transaction
management with snapshot isolation. In Gunter Saake, Kerstin Schwarz, and Can
Turker, editors, 8th International Workshop on Foundations of Models and Languages
for Data and Objects - Transactions and Database Dynamics '99, volume 1773 of Lecture
Notes in Computer Science, pages 1{25, Dagstuhl Castle, Germany, 1999. Springer.
7

Demonstrations

[1] Ste en Metzger, Michael Stoll, Katja Hose, and Ralf Schenkel. LUKe and MIKE: Learning
from user knowledge and managing interactive knowledge extraction. In 21st ACM International
Conference on Information and Knowledge Management (CIKM 2012), Maui,
USA, 2012.
[2] Andreas Schwarte, Peter Haase, Katja Hose, Ralf Schenkel, and Michael Schmidt. FedX:
A federation layer for distributed query processing on linked open data. In 8th Extended
Semantic Web Conference (ESWC 2011), 2011.
[3] Shady Elbassuoni, Katja Hose, Ste en Metzger, and Ralf Schenkel. ROXXI: Reviving
witness dOcuments to eXplore eXtracted Information. Proceedings of the VLDB Endowment,
3, 2010.
[4] Tom Crecelius, Mouna Kacimi, Sebastian Michel, Thomas Neumann, Josiane Xavier Parreira,
Ralf Schenkel, and Gerhard Weikum. Making SENSE: Socially ENhanced Search
and Exploration. In Proceedings of the 34th International Conference on Very Large Data
Bases (VLDB 2008), pages 1480{1483, Auckland, New Zealand, 2008. ACM.
[5] Martin Theobald, Ralf Schenkel, and GerhardWeikum. The TopX DB&IR engine (demo).
In Nick Koudas, editor, 2007 ACM SIGMOD International Conference on Management
of Data, pages 1141{1143. ACM, ACM, 2007.
[6] Tom Crecelius, Mouna Kacimi, Sebastian Michel, Thomas Neumann, Josiane Xavier Parreira,
Ralf Schenkel, and Gerhard Weikum. Social recommenations at work (demo). In
Proceedings of the 31st Annual International ACM SIGIR Conference on Research & Development
on Information Retrieval (SIGIR 2008), pages 884{884, Singapore, Singapore,
July 2008. ACM.
[7] Hanglin Pan, Ralf Schenkel, and Gerhard Weikum. Fine-grained relevance feedback for
XML retrieval (demo). In Proceedings of the 31st Annual International ACM SIGIR
Conference on Research & Development on Information Retrieval (SIGIR 2008), pages
887{887, Singapore, Singapore, July 2008. ACM.
[8] Hanglin Pan, Anja Theobald, and Ralf Schenkel. Query re nement by relevance feedback
in an XML retrieval system (demo). In Paolo Atzeni, Wesley W. Chu, Hongjun Lu,
Shuigeng Zhou, and TokWang Ling, editors, 23rd International Conference on Conceptual
Modeling (ER 2004), volume 3288 of Lecture Notes in Computer Science, pages 854{855,
Shanghai, China, nov 2004. Springer. Acceptance ratio 1:5.
Other Publications
[1] Andreas Harth, Katja Hose, and Ralf Schenkel. Database techniques for linked data
management. In ACM SIGMOD International Conference on Management of Data
(SIGMOD 2012), Scottsdale, USA, 2012.
[2] Krisztian Balog, David Carmel, Arjen P. de Vries, Daniel M. Herzig, Peter Mika, Haggai
Roitman, Ralf Schenkel, Pavel Serdyukov, and Duc Thanh Tran. The rst joint international
workshop on entity-oriented and semantic search (JIWES). ACM SIGIR Forum,
46(2):87{94, December 2012.
[3] Kaap Kamps, Jussi Karlgren, and Ralf Schenkel. Report on the Third Workshop on
Exploiting Semantic Annotations in Information Retrieval (ESAIR). SIGIR Forum,
45(1):33{41, June 2011.
[4] D. Alexander et al. Report on INEX 2010. SIGIR Forum, 45(1):2{17, June 2011.
8
[5] Thomas Beckers et al. Report on INEX 2009. SIGIR Forum, 44(1), June 2010.
[6] Shady Elbassuoni, Maya Ramanath, Ralf Schenkel, and Gerhard Weikum. Searching
RDF graphs with SPARQL and keywords. IEEE Data Engineering Bulletin, 33(1):16{
24, March 2010.
[7] Andreas Broschart and Ralf Schenkel. MMCI at the TREC 2010 web track. In Ellen M.
Vorhees and Lori P. Buckland, editors, The Nineteenth Text REtrieval Conference Proceedings
(TREC 2010), 2011.
[8] Gianluca Demartini, Ludovic Denoyer, Antoine Doucet, Khairun Nisa Fachry, Patrick
Gallinari, Shlomo Geva, Wei-Che Huang, Tereza Iofciu, Jaap Kamps, Gabriella Kazai,
Marijn Koolen, Monica Landoni, Ragnar Nordlie, Nils Pharo, Ralf Schenkel, Martin
Theobald, Andrew Trotman, Arjen P. de Vries, Alan Woodley, and Jianhan Zhu. Report
on INEX 2008. SIGIR Forum, 43(1):22{28, June 2009.
[9] Ralf Schenkel, Tom Crecelius, Mouna Kacimi, Thomas Neumann, Josiane Parreira, Marc
Spaniol, and Gerhard Weikum. Social wisdom for search and recommendation. IEEE
Data Engineering Bulletin, 31(2):40{49, June 2008.
[10] Shlomo Geva, Jaap Kamps, Miro Lehtonen, Ralf Schenkel, James A. Thom, and Andrew
Trotman. Overview of the INEX 2009 ad hoc track. In Shlomo Geva, Jaap Kamps, and
Andrew Trotman, editors, Preproceedings of the 2009 INEX Workshop, pages 16{50,
Woodlands of Marburg, Australia, December 2009. IR Publishers.
[11] Ralf Schenkel and Martin Theobald. Overview of the INEX 2009 eciency track. In
Shlomo Geva, Jaap Kamps, and Andrew Trotman, editors, Preproceedings of the 2009
INEX Workshop, pages 175{187, Woodlands of Marburg, Australia, December 2009. IR
Publishers.
[12] Martin Theobald, Ablimit Aji, and Ralf Schenkel. TopX 2.0 at the INEX 2009 ad-hoc
and eciency tracks. In Shlomo Geva, Jaap Kamps, and Andrew Trotman, editors,
INEX 2009 Workshop Preproceedings, pages 198{208, Brisbane, Australia, December
2009. Springer.
[13] Andreas Broschart and Ralf Schenkel. Index tuning for ecient proximity-enhanced
query processing. In Shlomo Geva, Jaap Kamps, and Andrew Trotman, editors, Preproceedings
of the 2009 INEX Workshop, pages 188{191, Woodlands of Marburg, Australia,
2009. IR Publications.
[14] Martin Theobald, Mohammed AbuJarour, and Ralf Schenkel. TopX 2.0 at the INEX
2008 Eciency Track. In Shlomo Geva, Jaap Kamps, and Andrew Trotman, editors,
Preproceedings of the 7th Int. Workshop of the Initiative for the Evaluation of XML
Retrieval (INEX 2008), pages 230{244, Schloss Dagstuhl, Germany, 2008.
[15] Martin Theobald and Ralf Schenkel. Overview of the INEX 2008 Eciency Track. In
Shlomo Geva, Kaap Kamps, and Andrew Trotman, editors, Preproceedings of the 7th
International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX
2008), pages 208{219, Schloss Dagstuhl, Germany, 2008.
[16] Andreas Broschart and Ralf Schenkel. Eziente Textsuche mit Positionsinformation.
In Hagen Hopfner, editor, 20. Workshop uber Grundlagen von Datenbanken, Apolda,
Thuringen, 2008.
[17] Holger Bast, Debapriyo Majumdar, Ralf Schenkel, Martin Theobald, and Gerhard
Weikum. IO-Top-k at TREC 2006: Terabyte Track. In Ellen M. Voorhees and Lori P.
Buckland, editors, Proceedings of the 15th Text REtrieval Conference (TREC 2006),
Gaithersburg, Maryland, 2006. NIST.
9

Theses

[1] Ralf Schenkel. Transaktionen in foderierten Datenbanksystemen unter eingeschrankten
Isolation Levels. Phd thesis, Universitat des Saarlandes, December 2001.
[2] Ralf Schenkel. Konzeption und Implementierung des Kommunikationsmanagers fur das
Work
ow-Management-System MENTOR - Integration und Synchronisation der verteilten
Work
ow-Engine. Diplomarbeit, Universitat des Saarlandes, September 1997.
10