1

Prof. Dr. Rainer Gemulla

Chair of Practical Computer Science I: Data Analytics

Universität Mannheim
B6, 26, Room B 016
D-68159 Mannheim

Tel.: +49 621 181 2480

rgemulla uni-mannheim.de
My PGP public key (id 0x81405E0B30302532)

I am heading the Chair of Practical Computer Science I: Data Analytics at the University of Mannheim. The chair is part of the Data and Web Science Group.

Go to: Research Interests, CV, PhD Students, Teaching, Awards, Professional Activities, Data and Software, Publications

If you consider applying to our lab, please read:

  • Applications should include CV, transcripts, and a short (!) cover letter or will be ignored.
  • We generally do not offer short interships (3 months or less). Applications for such internships will be ignored.
  • If you are a BSc or MSc student here, have very good transcripts, and are interested in a student job with us, contact me directly.

News

Research Interests

  • Data analysis and data mining
  • Text mining and information extraction
  • Optimization
  • Approximation techniques
  • Algorithms for modern hardware

Curriculum Vitae

Since 2014   W3-Professor for Practical Computer Science I, Universität Mannheim, Germany
2010 – 2014   Senior researcher / group leader, Max-Planck-Institut für Informatik, Saarbrücken, Germany
2008 – 2010   Postdoctoral researcher, IBM Almaden Research Center, San Jose, CA, USA
2004 – 2008   PhD in Computer Science, Technische Universität Dresden, Germany

PhD Students

Former PhD students

Kaustubh Beedkar, Luciano del Corro, Stefan Kain, Faraz Makari Manshadi, Christina Teflioudi, Yanjie Wang

Teaching

If you are interested in writing a seminar, Bachelor or Master thesis with us, please read the following guidelines.

Current semester (HWS 2021)

Previous semester (FSS 2021)

Awards

  • Named Distinguished PC Member for SIGMOD, 2017
  • Junior-Fellow of the Gesellschaft für Informatik (GI), 2013
  • AWS in Education Research Grant Award, 2013
  • Busy Beaver teaching award (winter term 2012/2013)
    for Non-Traditional Data Management (NoSQL and more)
  • IBM's 2011 Pat Goldberg Memorial best paper award in CS, EE and Math
    (for „Large-Scale Matrix Factorization with Distributed Stochastic Gradient Descent“ with P. J. Haas, E. Nijkamp, and Y. Sismanis; KDD 2011)
  • Best paper of NIPS 2011 Biglearn workshop
    (for „Large-Scale Matrix Factorization with Distributed Stochastic Gradient Descent“ with P. J. Haas, Y. Sismanis, C. Teflioudi, and F. Makari)
  • Google Focused Research Award 2011: Robust and Scalable Fact Discovery from Web Sources
    (with G. Weikum and M. Theobald)
  • Research Highlight in Communications of the ACM
    (for „Distinct-Value Synopses for Multiset Operations“ with K. Beyer, P.J. Haas, B. Reinwald, Y. Sismanis)
  • The VLDB Journal, Special Issue: Best Papers of VLDB 2006
    (for „A Dip in the Reservoir: Maintaining Sample Synopses of Evolving Datasets“ with W. Lehner and P.J. Haas)

Professional Activities

Associate editor / area chair

  • VLDB: 2021, 2019, 2015
  • TKDE: 2015–2018
  • DASP: 2018
  • EDBT: 2017
  • JISA: 2016
  • CIKM: 2014

PC member / reviewer (since 2011)

  • 2021: DEEM, EDBT, IJCAI, SIGMOD (demo), Repl4NLP
  • 2020: AKBC, EDBT, IJCAI, LWDA, Repl4NLP, SUM, TPDS
  • 2019: AKBC, BTW, DEEM, IJCAI, INFORMATIK, LWDA, SUM
  • 2018: VLDB, EDBT, DEEM
  • 2017: SIGMOD, BTW, DEEM, TALG, VLDB, ECML-PKDD
  • 2016: SIGMOD, ECML-PKDD
  • 2015: BTW, DAMI, GvDB, IS, JODS, JWS, PODS
  • 2014: BDDC, BigData, Buda, DMC, JMLR, SIGMOD, VLDB
  • 2013: AKBC, BigData, BTW, CIKM, DMC, ICALP, TKDE, TML, VLDB
  • 2012: KDD, JMLR, TODS
  • 2011: BTW, IS, VLDB, VLDBJ

Organizer

Data and Software

  • Lapse: A parameter server with dynamic parameter allocation
  • LibKGE: A knowledge graph embedding library
  • OPIEC: An open information extraction corpus
  • MinIE: Open information extractor (spiritual successor to ClausIE)
  • DSGDpp: Various parallel algorithms for matrix factorization (including DSGD++)
  • DESQ: Frequent sequence mining with subsequence constraints
  • Rounding rank: algorithms for computing rounding-rank decompositions
  • CORE: Context-aware open relation extraction with factorization machines
  • FINET: Context-aware fine-grained named entity typing
  • Werdy: Recognition and Disambiguation of Verbs and Verb Phrases with Syntactic and Semantic Pruning
  • ClausIE: Clause-Based Open Information Extraction
  • LEMP: Fast Retrieval of Large Entries in a Matrix Product
  • LASH: Large-Scale Sequence Mining with Hierarchies
  • MG-FSM: Large-Scale Frequent Sequence Mining

Publications

See also Google Scholar and DBLP.

Preprints   Y. Wang, S. Broscheit, R. Gemulla
A Relational Tucker Decomposition for Multi-Relational Link Prediction [arXiv]
2019
2020   A. Renz-Wieland, R. Gemulla, S. Zeuch, V. Markl
Dynamic Parameter Allocation in Parameter Servers [pdf, source code]
In VLDB, 2020
 S. Broscheit, K. Gashteovski, Y. Wang, Rainer Gemulla
Can We Predict New Facts with Open Knowledge Graph Embeddings? A Benchmark for Open Link Prediction [pdf, resources]
In ACL, 2020
 D. Ruffinelli, S. Broscheit, R. Gemulla
You CAN Teach an Old Dog New Tricks! On Training Knowledge Graph Embeddings [pdf, video, resources, OpenReview]
In ICLR, 2020
2019   Y. Wang, D. Ruffinelli, R. Gemulla, S. Broscheit, C. Meilicke
On Evaluating Embedding Models for Knowledge Base Completion [pdf]
In RepL4NLP workshop, 2019
 K. Beedkar, R. Gemulla, W. Martens
A Unified Framework for Frequent Sequence Mining with Subsequence Constraints [pdf (journal version), pdf (author version), resources]
In TODS, 2019
 K. Gashteovski, S. Wanner, S. Hertling, S. Broscheit, R. Gemulla
OPIEC: An Open Information Extraction Corpus [pdf, poster, resources, OpenReview]
In AKBC, 2019
 A. Renz-Wieland, M. Bertsch, R. Gemulla
Scalable Frequent Sequence Mining With Flexible Subsequence Constraints [pdf, poster]
In ICDE, 2019
2018   C. Meilicke, M. Fink, Y. Wang, D. Ruffinelli, R. Gemulla, and H. Stuckenschmidt
Fine-grained Evaluation of Rule- and Embedding-based Systems for Knowledge Graph Completion [pdf, resources]
In ISWC, 2018
 J. Pfeiffer, S. Broscheit, R. Gemulla, M. Göschl
A Neural Autoencoder Approach for Document Ranking and Query Refinement in Pharmacogenomic Information Retrieval [pdf]
In BioNLP workshop, 2018
 S. Broscheit, R. Gemulla, M. Keuper
Learning Distributional Token Representations from Visual Features [pdf]
In RepL4NLP workshop, 2018
 Y. Wang, R. Gemulla, H. Li
On Multi-Relational Link Prediction with Bilinear Models [pdf, resources]
In AAAI, 2018
2017   K. Gashteovski, R. Gemulla, L. del Corro
MinIE: Minimizing Facts in Open Information Extraction [pdf, poster, resources]
In EMNLP, pp. 2620-2630, 2017
 C. Teflioudi, R. Gemulla
Exact and Approximate Maximum Inner Product Search with LEMP [pdf (journal version), pdf (author version), resources]
In TODS, 42(1) Art. 5, 2017
2016   S. Neumann, R. Gemulla, P. Miettinen
What You Will Gain By Rounding: Theory and Algorithms for Rounding Rank [pdf, tech report, resources]
In ICDM, pp. 380-389, 2016
 K. Beedkar, R. Gemulla
DESQ: Frequent Sequence Mining with Subsequence Constraints [pdf, tech report, resources]
In ICDM (short paper), pp. 793-798, 2016
2015   L. Del Corro, A. Abujabal, R. Gemulla, G. Weikum
FINET: Context-Aware Fine-Grained Named Entity Typing [pdf, slides, resources]
In EMNLP, pp. 868-878, 2015
 F. Petroni, L. Del Corro, R. Gemulla
CORE: Context-Aware Open Relation Extraction with Factorization Machines [pdf, slides, resources]
In EMNLP, pp. 1763-1773, 2015
 K. Beedkar, K. Berberich, R. Gemulla, I. Miliaraki
Closing the Gap: Sequence Mining at Scale [pdf (journal version), pdf (author version), resources]
In TODS, 40(2) Art. 8, 2015
 C. Teflioudi, R. Gemulla, O. Mykytiuk
LEMP: Fast Retrieval of Large Entries in a Matrix Product [pdf, slides, resources]
In SIGMOD, pp. 107-122, 2015
 K. Beedkar, R. Gemulla
LASH: Large-Scale Sequence Mining with Hierarchies [pdf, slides, source code]
In SIGMOD, pp. 491-503, 2015
 R. Gemulla
A Self-Portrayal of GI Junior Fellow Rainer Gemulla: Data Analysis at Scale [pdf (journal version), pdf (author version)]
it – Information Technology 57(2), pp. 130–132 , 2015
2014   L. Del Corro, R. Gemulla, G. Weikum
Werdy: Recognition and Disambiguation of Verbs and Verb Phrases with Syntactic and Semantic Pruning [pdf, resources]
In EMNLP, pp. 374-385, 2014
 P. Roy, J. Teubner, R. Gemulla
Low-Latency Handshake Join [pdf]
In PVLDB, 7(9), pp. 709-720, 2014
 L. Qu, Y. Zhang, R. Wang, L. Jiang, R. Gemulla, G. Weikum
Senti-LSSVM: Sentiment-Oriented Multi-Relation Extraction with Latent Structural SVM [pdf]
In TACL, 2, pp. 155-168, 2014
 D. Erdös, R. Gemulla, E. Terzi
Reconstructing Graphs from Neighborhood Data [pdf (author version), pdf (journal version)]
In TKDD, 8(4), 2014
2013   F. Makari, C. Teflioudi, R. Gemulla, P. J. Haas, Y. Sismanis
Shared-Memory and Shared-Nothing Stochastic Gradient Descent Algorithms for Matrix Completion [pdf (author version), pdf (journal version), source code]
In KAIS (special issue: best papers of ICDM 2012), pp. 1-31, 2013
 F. Makari, R. Gemulla
A Distributed Approximation Algorithm for Mixed Packing-Covering Linear Programs [pdf]
In NIPS 2013 Biglearn workshop (poster), 2013
 F. Makari, B. Awerbuch, R. Gemulla, R. Khandekar, J. Mestre, M. Sozio
A Distributed Algorithm for Large-Scale Generalized Matching [pdf, slides]
The analysis of the number of binary search steps (Lemma 2) contains a bug; see our Biglearn paper for a corrected version.
In PVLDB, 6(9), pp. 613-624, 2013
 I. Miliaraki, K. Berberich, R. Gemulla, S. Zoupanos
Mind the Gap: Large-Scale Frequent Sequence Mining [pdf, slides, resources]
In SIGMOD, pp. 797-808, 2013
 L. Del Corro, R. Gemulla
ClausIE: Clause-Based Open Information Extraction [pdf, slides, resources]
In WWW, pp. 355-366, 2013
 R. Gemulla, P. J. Haas, W. Lehner
Non-Uniformity Issues and Workarounds in Bounded-Size Sampling [pdf (author version), pdf (journal version), source code]
In The VLDB Journal, 22(6), pp. 753-772, 2013
 K. Beedkar, L. Del Corro, R. Gemulla
Fully Parallel Inference in Markov Logic Networks [pdf]
In BTW, pp. 205-224, 2013
2012   D. Erdös, R. Gemulla, E. Terzi
Reconstructing Graphs from Neighborhood Data [pdf, slides]
In ICDM, pp. 231-240, 2012
 C. Teflioudi, F. Makari, R. Gemulla
Distributed Matrix Completion [pdf, slides, source code]
In ICDM, pp. 655-664, 2012
 L. Qu, R. Gemulla, G. Weikum
A Weakly Supervised Model for Sentence-Level Semantic Orientation Analysis with Multiple Experts [pdf]
In EMNLP-CoNLL, pp. 149-159, 2012
2011   R. Gemulla, P. J. Haas, Y. Sismanis, C. Teflioudi, F. Makari
Large-Scale Matrix Factorization with Distributed Stochastic Gradient Descent [pdf, slides, source code]
In NIPS 2011 Biglearn workshop, 2011 (best paper award)
 R. Gemulla, E. Nijkamp, P. J. Haas, Y. Sismanis
Large-Scale Matrix Factorization with Distributed Stochastic Gradient Descent [pdf, slides, source code]
In KDD, pp. 69-77, 2011
 K. Beyer, V. Ercegovac, R. Gemulla, A. Balmin, M. Eltabakh, C.C. Kanne, F. Ozcan, E. Shekita
Jaql: A Scripting Language for Large Scale Semistructured Data Analysis [pdf]
In PVLDB (industrial track), 4(11), pp. 1272-1283, 2011
 M. Y. Eltabakh, Y. Tian, F. Özcan, R. Gemulla, A. Krettek, J. McPherson
CoHadoop: Flexible Data Placement and Its Exploitation in Hadoop [pdf]
In PVLDB, 4(9), pp. 575-585, 2011
 R. Gemulla, P. J. Haas, E. Nijkamp, Y. Sismanis
Large-Scale Matrix Factorization with Distributed Stochastic Gradient Descent [pdf]
IBM Research Report RJ10481, March 2011 Revised February, 2013
 B. Schlegel, R. Gemulla, W. Lehner
Memory-Efficient Frequent-Itemset Mining [pdf]
In EDBT, pp. 461-472, 2011
2010   S. Das, Y. Sismanis, K. S. Beyer, R. Gemulla, P. J. Haas, J. McPherson.
Ricardo: Integrating R and Hadoop [pdf]
In SIGMOD (industrial track), pp. 987-998, 2010
 B. Schlegel, R. Gemulla, W. Lehner.
Fast Integer Compression using SIMD Instructions [pdf]
In DAMON, pp. 34-40, 2010
2009   K. Beyer, R. Gemulla. P. J. Haas, B. Reinwald, Y. Sismanis.
Distinct-Value Synopses for Multiset Operations [pdf, technical perspective by Surajit Chaudhuri]
In Commun. ACM, 52(10), pp. 87-95, 2009
 B. Schlegel, R. Gemulla, W. Lehner.
k-Ary Search on Modern Processors [pdf, slides]
In DAMON, pp. 52-60, 2009
2008   R. Gemulla.
Sampling Algorithms for Evolving Datasets [pdf, summary, slides]
Ph.D. thesis, Technische Universität Dresden, 2009
URL for citations: nbn-resolving.de/urn:nbn:de:bsz:14-ds-1224861856184-11644
 R. Gemulla, P. Rösch and W. Lehner.
Linked Bernoulli Synopses: Sampling Along Foreign Keys [pdf, slides]
In SSDBM, pp. 6-23, 2008
 R. Gemulla and W. Lehner.
Sampling Time-Based Sliding Windows in Bounded Space [pdf, slides]
As observed by Hu et al., the lower bound of Ω(k log N) stated in Theorem 1 should read Ω(k log(N/k)).
In SIGMOD, pp. 379-392, 2008
 P. Rösch, R. Gemulla and W. Lehner.
Designing Random Sample Synopses with Outliers [pdf, poster]
In ICDE (poster), pp. 1400-1402, 2008
2007   R. Gemulla, W. Lehner and P.J. Haas.
Maintaining Bounded-Size Sample Synopses of Evolving Datasets [pdf]
The resizing algorithm proposed in this article contains a bug; see my Ph.D. thesis or our 2013 VLDB Journal paper for a corrected version.
In The VLDB Journal, Special Issue: Best Papers of VLDB 2006, pp. 173-201, 2007
 K. Beyer, P. J. Haas, B. Reinwald, Y. Sismanis and R. Gemulla.
On Synopses for Distinct-Value Estimation Under Multiset Operations [pdf, slides]
In SIGMOD, pp. 199-210, 2007
 R. Gemulla, W. Lehner and P. J. Haas.
Maintaining Bernoulli Samples over Evolving Multisets [pdf, slides]
In PODS, pp. 93-102, 2007
2006   R. Gemulla, W. Lehner and P. J. Haas.
A Dip in the Reservoir: Maintaining Sample Synopses of Evolving Datasets [pdf, slides]
In VLDB, pp. 595-606, 2006
 A. Klein, R. Gemulla, P. Rösch and W. Lehner.
Derby/S: A DBMS for Sample-Based Query Answering [pdf, poster1, poster2]
In SIGMOD (demo), pp. 757-759, 2006
 R. Gemulla and W. Lehner.
Deferred Maintenance of Disk-Based Random Samples [pdf, slides]
In EDBT, pp. 423-441, 2006

Kontakt

Prof. Dr. Rainer Gemulla

Prof. Dr. Rainer Gemulla

Chair of Practical Computer Science I: Data Analytics
University of Mannheim
School of Business Informatics and Mathematics
B 6, 26 – Room B 0.16
68159 Mannheim
Phone: +49 621 181–2480
E-mail: rgemulla uni-mannheim.de
Web: www.uni-mannheim.de/dws/people/professors/prof-dr-rainer-gemulla
Photo credit: Leonie Kopetzki
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