Head
![Benno Stein](https://webis.de/weimar/people/img/stein.jpg)
Prof. Dr. Benno Stein
benno.stein@uni-weimar.de
+49 (0)3643 - 58 3795
benno.stein@uni-weimar.de
+49 (0)3643 - 58 3795
Interests: Information Retrieval, Machine Learning, Natural Language Processing, Artificial Intelligence
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Secretaries
![Maria-Theresa Hansens](https://webis.de/weimar/people/img/hansens.jpg)
Maria-Theresa Hansens
maria-theresa.hansens@uni-weimar.de
Schwanseestraße 143 · Room 2.24
+49 (0)3643 - 58 3727 | Fax 3728
maria-theresa.hansens@uni-weimar.de
Schwanseestraße 143 · Room 2.24
+49 (0)3643 - 58 3727 | Fax 3728
![Rubi Richter](https://webis.de/weimar/people/img/richter.jpg)
Rubi Richter
rubi.richter@uni-weimar.de
Schwanseestraße 143 · Room 2.25
+49 (0)3643 - 58 3710 | Fax 3709
rubi.richter@uni-weimar.de
Schwanseestraße 143 · Room 2.25
+49 (0)3643 - 58 3710 | Fax 3709
Assistants
![Janek Bevendorff](https://webis.de/weimar/people/img/bevendorff.jpg)
Janek Bevendorff[2018 - today]
janek.bevendorff@uni-weimar.de
+49 (0)3643 - 58 3577
janek.bevendorff@uni-weimar.de
+49 (0)3643 - 58 3577
Interests: Natural Language Processing, Machine Learning, Information Retrieval, Data Science, Elasticsearch, Software Engineering, Linux Cluster
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![Marcel Gohsen](https://webis.de/weimar/people/img/gohsen.jpg)
Marcel Gohsen[2020 - today]
marcel.gohsen@uni-weimar.de
+49 (0)3643 - 58 3811
marcel.gohsen@uni-weimar.de
+49 (0)3643 - 58 3811
Interests: Big Data, Conversational Search, Information Retrieval, Natural Language Processing
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![Tim Gollub](https://webis.de/weimar/people/img/gollub.jpg)
Dr. Tim Gollub[2008 - today]
tim.gollub@uni-weimar.de
+49 (0)3643 - 58 3566
tim.gollub@uni-weimar.de
+49 (0)3643 - 58 3566
Interests: Digital Humanities, Information Retrieval, Web Technologies
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![Maximilian Heinrich](https://webis.de/weimar/people/img/heinrich.jpg)
Maximilian Heinrich[2022 - today]
maximilian.heinrich@uni-weimar.de
+49 (0)3643 - 58 3863
maximilian.heinrich@uni-weimar.de
+49 (0)3643 - 58 3863
Interests: Natural Language Processing, Machine Learning, Argumentation
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![Johannes Kiesel](https://webis.de/weimar/people/img/kiesel.jpg)
Dr. Johannes Kiesel[2014 - today]
johannes.kiesel@uni-weimar.de
+49 (0)3643 - 58 3720
johannes.kiesel@uni-weimar.de
+49 (0)3643 - 58 3720
Interests: Data Mining, Information Retrieval, Reproducibility
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![Nikolay Kolyada](https://webis.de/weimar/people/img/kolyada.jpg)
Nikolay Kolyada[2020 - today]
nikolay.kolyada@uni-weimar.de
+49 (0)3643 - 58 3811
nikolay.kolyada@uni-weimar.de
+49 (0)3643 - 58 3811
Interests: Information Retrieval, Natural Language Processing, Software Engineering
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![Nailia Mirzakhmedova](https://webis.de/weimar/people/img/mirzakhmedova.jpg)
Nailia Mirzakhmedova[2022 - today]
nailia.mirzakhmedova@uni-weimar.de
+49 (0)3643 - 58 3576
nailia.mirzakhmedova@uni-weimar.de
+49 (0)3643 - 58 3576
Interests: Natural Language Processing, Automatic Summarization
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![Michael Völske](https://webis.de/weimar/people/img/voelske.jpg)
Dr. Michael Völske[2013 - 2021, 2022 - today (part-time)]
Artefact Germany, Bauhaus-Universität Weimar
michael.voelske@uni-weimar.de
+49 (0)3643 - 58 3863
Artefact Germany, Bauhaus-Universität Weimar
michael.voelske@uni-weimar.de
+49 (0)3643 - 58 3863
Interests: Information Retrieval, Machine Learning, Data Science
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![Matti Wiegmann](https://webis.de/weimar/people/img/wiegmann.jpg)
Matti Wiegmann[2018 - today]
matti.wiegmann@uni-weimar.de
+49 (0)3643 - 58 3575
matti.wiegmann@uni-weimar.de
+49 (0)3643 - 58 3575
Interests: Social Media Analysis, Authorship, Natural Language Processing
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![Magdalena Wolska](https://webis.de/weimar/people/img/wolska.jpg)
Dr. Magdalena Wolska[2018 - today]
magdalena.wolska@uni-weimar.de
+49 (0)3643 - 58 3567
magdalena.wolska@uni-weimar.de
+49 (0)3643 - 58 3567
Interests: Natural Language Processing, Violence Analysis in Text
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External PhDs
![Roxanne El Baff](https://webis.de/weimar/people/img/elbaff.jpg)
Roxanne El Baff[2017 - today]
Deutsches Zentrum für Luft- und Raumfahrt
roxanne.elbaff@dlr.de
Deutsches Zentrum für Luft- und Raumfahrt
roxanne.elbaff@dlr.de
Interests: Computational Argumentation
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Former assistants
![Yamen Ajjour](https://webis.de/weimar/people/img/ajjour.jpg)
Dr. Yamen Ajjour[2017 - 2023]
Leibniz Universität Hannover
y.ajjour@ai.uni-hannover.de
Leibniz Universität Hannover
y.ajjour@ai.uni-hannover.de
Interests: Natural Language Processing, Information Retrieval
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![Khalid Al-Khatib](https://webis.de/weimar/people/img/alkhatib.jpg)
Assistant Prof. Dr. Khalid Al-Khatib[2014 - 2021]
University of Groningen
khalid.alkhatib@rug.nl
University of Groningen
khalid.alkhatib@rug.nl
Interests: Natural Language Processing, Information Retrieval, Computational Social Science
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![Maik Anderka](https://webis.de/weimar/people/img/anderka.jpg)
Dr. Maik Anderka[2007 - 2012]
Diebold Nixdorf
maik@anderka.com
Diebold Nixdorf
maik@anderka.com
Interests: Machine Learning, Data Mining, Measuring Quality of Web Content, Semantic Retrieval Models
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![Heinrich Balzer](https://webis.de/weimar/people/img/balzer.jpg)
Heinrich Balzer[2006 - 2008]
dSPACE GmbH
hbalzer@dspace.de
dSPACE GmbH
hbalzer@dspace.de
Interests: Diagnosis of Technical Systems
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![Andreas Bunte](https://webis.de/weimar/people/img/bunte.jpg)
Dr. Andreas Bunte[2014 - 2020]
Hochschule Ostwestfalen-Lippe, Lemgo
andreas.bunte@iosb-ina.fraunhofer.de
Hochschule Ostwestfalen-Lippe, Lemgo
andreas.bunte@iosb-ina.fraunhofer.de
Interests: Knowledge-based Modeling of Cyber-Physical Systems, Model-Based Diagnosis
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![Steven Burrows](https://webis.de/weimar/people/img/burrows.jpg)
Dr. Steven Burrows[2011 - 2012]
Computer Power Institute, Melbourne, Australia
stevenburrows81@gmail.com
Computer Power Institute, Melbourne, Australia
stevenburrows81@gmail.com
Interests: Data Mining, Machine Learning, Digital Engineering, Natural Language Processing, Paraphrasing
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![Wei-Fan Chen](https://webis.de/weimar/people/img/chen.jpg)
Dr. Wei-Fan Chen[2017 - 2019]
University of Bonn
wchen@uni-bonn.de
University of Bonn
wchen@uni-bonn.de
Interests: Media Bias, Computational Social Science, Natural Language Generation
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![Astrid Frey](https://webis.de/weimar/people/img/frey.jpg)
Astrid Frey[2017]
Interests: Statistical Methods, Artificial Intelligence
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![Steve Göring](https://webis.de/weimar/people/img/goering.jpg)
Steve Göring[2014 - 2015]
stg7@gmx.de
stg7@gmx.de
Interests: Databases, Big Data, Math
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![Matthias Hagen](https://webis.de/weimar/people/img/hagen.jpg)
Prof. Dr. Matthias Hagen[2008 - 2013]
Friedrich Schiller University Jena
matthias.hagen@uni-jena.de
Friedrich Schiller University Jena
matthias.hagen@uni-jena.de
Interests: Information Retrieval, Natural Language Processing, Data Analytics and Mining
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![Dennis Hoppe](https://webis.de/weimar/people/img/hoppe.jpg)
Dennis Hoppe[2010 - 2012]
Höchstleistungsrechenzentrum Stuttgart
dennis@dennis-hoppe.com
Höchstleistungsrechenzentrum Stuttgart
dennis@dennis-hoppe.com
Interests: Data Mining, Recommender Systems, Patent Retrieval
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![Erik Körner](https://webis.de/weimar/people/img/koerner.jpg)
Erik Körner[2021 - 2022]
Sächsische Akademie der Wissenschaften zu Leipzig
koerner@saw-leipzig.de
Sächsische Akademie der Wissenschaften zu Leipzig
koerner@saw-leipzig.de
Interests: Information Retrieval, Machine Learning, Natural Language Processing
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![Kevin Lang](https://webis.de/weimar/people/img/lang.jpg)
Kevin Lang[2018 - 2022]
Bauhaus-Universität Weimar
kevin.lang@uni-weimar.de
Bauhaus-Universität Weimar
kevin.lang@uni-weimar.de
Interests: Research Data Management
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![Nedim Lipka](https://webis.de/weimar/people/img/lipka.jpg)
Dr. Nedim Lipka[2007 - 2012]
Adobe Systems Inc.
lipka.nedim@gmail.com
Adobe Systems Inc.
lipka.nedim@gmail.com
Interests: Text Classification, Computational Learning Theory, Semi-Supervised Learning
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![Lars Meyer](https://webis.de/weimar/people/img/meyer.jpg)
Lars Meyer[2020]
Enginsight GmbH
lars.meyer@enginsight.com
Enginsight GmbH
lars.meyer@enginsight.com
Interests: Conversational Search, Virtualized and Distributed Computing
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![Sven Meyer zu Eissen](https://webis.de/weimar/people/img/meyer-zu-eissen.jpg)
Dr. Sven Meyer zu Eissen[2005 - 2008]
Bayer Business Services GmbH
sven.meyerzueissen@bayer.com
Bayer Business Services GmbH
sven.meyerzueissen@bayer.com
Interests: Retrieval Models, Web Genre Analysis, Document Categorization, Data Mining, Software Engineering
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![Tsvetomira Palakarska](https://webis.de/weimar/people/img/palakarska.jpg)
Tsvetomira Palakarska[2012 - 2013]
tsvetomira.palakarska@gmail.com
tsvetomira.palakarska@gmail.com
Interests: Machine Learning, Information Extraction, Opinion Mining, Sentiment Flow
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![Anne Peter](https://webis.de/weimar/people/img/peter.jpg)
Anne Peter[2020]
dotSource GmbH
anne_schindelar@outlook.com
dotSource GmbH
anne_schindelar@outlook.com
Interests: Autorship Analysis, Natural Language Processing, Machine Learning
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![Martin Potthast](https://webis.de/weimar/people/img/potthast.jpg)
Prof. Dr. Martin Potthast[2006 - 2017]
University of Kassel, hessian.AI, and ScaDS.AI
martin.potthast@uni-kassel.de
University of Kassel, hessian.AI, and ScaDS.AI
martin.potthast@uni-kassel.de
Interests: Information Retrieval, Natural Language Processing, Artificial Intelligence, Crowdsourcing, Reproducibility
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![Peter Prettenhofer](https://webis.de/weimar/people/img/prettenhofer.jpg)
Peter Prettenhofer[2009 - 2010]
DataRobot, Inc.
peter.prettenhofer@gmail.com
DataRobot, Inc.
peter.prettenhofer@gmail.com
Interests: Cross-Lingual Information Retrieval, Information Extraction, Semi-Supervised Learning, Domain Adaptation
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![Harrisen Scells](https://webis.de/weimar/people/img/scells.jpg)
Dr. Harrisen Scells[2021]
Leipzig University
harry.scells@uni-leipzig.de
Leipzig University
harry.scells@uni-leipzig.de
Interests: Information Retrieval, Medical Systematic Reviews
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![Shahbaz Syed](https://webis.de/weimar/people/img/syed.jpg)
Shahbaz Syed[2017 - 2018]
NEC Laboratories Europe
shahbaz.syed@neclab.eu
NEC Laboratories Europe
shahbaz.syed@neclab.eu
Interests: Deep Learning, Natural Language Processing, Information Retrieval
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![Martin Trenkmann](https://webis.de/weimar/people/img/trenkmann.jpg)
Martin Trenkmann[2013 - 2014]
martin.trenkmann@posteo.de
martin.trenkmann@posteo.de
Interests: Software Engineering, Heuristic Search, Big Data, Opinion Mining
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![Henning Wachsmuth](https://webis.de/weimar/people/img/wachsmuth.jpg)
Prof. Dr. Henning Wachsmuth[2015 - 2018]
Leibniz Universität Hannover
h.wachsmuth@ai.uni-hannover.de
Leibniz Universität Hannover
h.wachsmuth@ai.uni-hannover.de
Interests: Computational Argumentation, Natural Language Processing, Artificial Intelligence
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Visiting researchers
![Alberto Barrón-Cedeño](https://webis.de/weimar/people/img/barron-cedeno.jpg)
Dr. Alberto Barrón-Cedeño[Jan. - Feb. 2014]
Department of Interpreting and Translation, Università di Bologna
funded by BMWi Exist
albarron@gmail.com
Department of Interpreting and Translation, Università di Bologna
funded by BMWi Exist
albarron@gmail.com
Interests: Multilingual Text Analysis
![Pavel Braslavski](https://webis.de/weimar/people/img/braslavski.jpg)
Dr. Pavel Braslavski[Oct. - Dec. 2018, Oct. 2014, Oct. - Dec. 2013]
Combinatorial Algebra Lab, Ural Federal University
funded by DAAD
pbras@yandex.ru
Combinatorial Algebra Lab, Ural Federal University
funded by DAAD
pbras@yandex.ru
Interests: Search Query Log Ananlysis
![Edgardo Ferretti](https://webis.de/weimar/people/img/ferretti.jpg)
Dr. Edgardo Ferretti[Jan. 2014, Apr. - Jun. 2012]
Universidad Nacional de San Luis, Argentina
funded by EU FP7, Marie Curie
edgardo.ferretti@gmail.com
Universidad Nacional de San Luis, Argentina
funded by EU FP7, Marie Curie
edgardo.ferretti@gmail.com
Interests: Wikipedia Quality Analysis
![Adrian Pastor Lopez Monroy](https://webis.de/weimar/people/img/monroy.jpg)
Dr. Adrian Pastor Lopez Monroy[Jul. - Sep. 2013]
National Institute of Astrophysics, Optics and Electronics, Mexico
funded by EU FP7, Marie Curie
National Institute of Astrophysics, Optics and Electronics, Mexico
funded by EU FP7, Marie Curie
Interests: Text Understanding
![Robert H. Warren](https://webis.de/weimar/people/img/warren.jpg)
Dr. Robert H. Warren[Jul. 2012, Jun. 2010, Feb. 2009]
Carleton University, Canada (2012). University of Zurich, Switzerland (2010). University of Waterloo, Canada (2009)
funded by
rwarren@math.carleton.ca
Carleton University, Canada (2012). University of Zurich, Switzerland (2010). University of Waterloo, Canada (2009)
funded by
rwarren@math.carleton.ca
Interests: Database Integration, Semantic Web