Browse by research area

  1. Published

    Leveraging Architectural Thinking for Large-Scale E-Government Projects

    Burmeister, F., Drews, P. & Schirmer, I., 12.2019, ICIS 2019 Proceedings. Krcmar, H. & Fedorowicz, J. (eds.). The Association for Information Systems (AIS), 17 p. 3126. (40th International Conference on Information Systems, ICIS 2019).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  2. Published

    Optimizing eating disorder treatment outcomes for individuals identified via screening: An idea worth researching

    Taylor, C. B., Graham, A. K., Fitzsimmons-Craft, E. E., Sadeh-Sharvit, S., Balantekin, K. N., Flatt, R. E., Goel , N. J., Monterubio, G. E., Topooco, N., Karam, A. M., Firebaugh, M.-L., Ruzek, J. I., Funk, B., Oldenburg, B., Wilfley, D. E. & Jacobi, C., 01.11.2019, In: The International journal of eating disorders. 52, 11, p. 1224-1228 5 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  3. BERT for stock market sentiment analysis

    Sousa, M. G., Sakiyama, K., Rodrigues, L. D. S., Moraes, P. H., Fernandes, E. & Matsubara, E. T., 11.2019, IEEE 31st International Conference on Tools with Artificial Intelligence: ICTAI 2019 : proceedings : 4-6 November 2019, Portland, Oregon. Piscataway: IEEE - Institute of Electrical and Electronics Engineers Inc., p. 1589-1593 5 p. ( International Conference on Tools with Artificial Intelligence, ICTAI).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  4. Published

    Enabling Road Condition Monitoring with an on-board Vehicle Sensor Setup

    Kortmann, F., Peitzmeier, H., Meier, N., Heger, J. & Drews, P., 10.2019, 2019 IEEE Sensors, SENSORS 2019 - Conference Proceedings: Conference proceedings. Piscataway: IEEE - Institute of Electrical and Electronics Engineers Inc., 4 p. 8956699. (Proceedings of IEEE Sensors; vol. 2019-October).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  5. FaQuAD: Reading comprehension dataset in the domain of brazilian higher education

    Sayama, H. F., Araujo, A. V. & Fernandes, E. R., 10.2019, 2019 Brazilian Conference on Intelligent Systems: BRACIS 2019 : 15-18 October 2019, Salvador, Bahia, Brazil : proceedings. Piscataway: Institute of Electrical and Electronics Engineers Inc., p. 443-448 6 p. 8923668. (Proceedings - Brazilian Conference on Intelligent Systems; no. 8).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  6. Published

    Zur empirischen Beforschung des mBooks Belgien: Die Chancen eines Methodenmix

    Schreiber, W., Wagner, W., Trautwein, U. & Brefeld, U., 10.2019, Das Geschichtsschulbuch: Lehren – Lernen – Forschen . Kühberger, C., Bernhard, R. & Bramann, C. (eds.). Münster: Waxmann Verlag, p. 57-80 24 p. (Salzburger Beiträge zur Lehrer/innen/bildung; vol. 6).

    Research output: Contributions to collected editions/worksContributions to collected editions/anthologiesResearchpeer-review

  7. Published

    Personalized Transaction Kernels for Recommendation Using MCTS

    Tavakol, M., Joppen, T., Brefeld, U. & Fürnkranz, J., 01.09.2019, KI 2019: Advances in Artificial Intelligence - 42nd German Conference on AI, Proceedings. Benzmüller, C. & Stuckenschmidt, H. (eds.). Wiesbaden: Springer Verlag, p. 338-352 15 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11793 LNAI).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  8. Offline question answering over linked data using limited resources

    Kaur, P., Blücher, V., Jalota, R., Moussallem, D., Ngomo, A. C. N. & Usbeck, R., 09.2019, SEMPDS 2019: Posters and Demos at SEMANTiCS 2019. Alam, M., Usbeck, R., Pellegrini, T., Sack, H. & Sure-Vetter, Y. (eds.). Sun Site Central Europe (RWTH Aachen University), Vol. 2451. (CEUR Workshop Proceedings; vol. 2451).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  9. Published

    Mining Disease Courses across Organizations: A Methodology Based on Process Mining of Diagnosis Events Datasets

    de Toledo, P., Joppien, C., Paz Sesmero, M. & Drews, P., 01.07.2019, 2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2019. IEEE - Institute of Electrical and Electronics Engineers Inc., p. 354-357 4 p. 8857149. (Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  10. Improvising Digital Transformation: Strategy Unfolding in Acts of Organizational Improvisation

    Zimmer, M. P., 07.2019, Americas Conference on Information Systems - AMCIS 2019. Rodriguez-Abitia, G., Ferran, C., Santana, M. & Montealegre, R. (eds.). AIS eLibrary, 10 p. (Proceedings of the Americas Conference on Information Systems (AMCIS); vol. 2019).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  11. Published

    Influence of measurement errors on networks: Estimating the robustness of centrality measures

    Martin, C. & Niemeyer, P., 01.06.2019, In: Network Science. 7, 2, p. 180-195 16 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  12. Published

    State-wide university implementation of an online platform for eating disorders screening and intervention.

    Fitzsimmons-Craft, E. E., Firebaugh, M.-L., Graham, A. K., Eichen M., D., Monterubio, G., Balantekin, K. N., Karam, A. M., Seal , A., Funk, B., Taylor, C. B. & Wilfley, D., 05.2019, In: Psychological Services. 16, 2, p. 239-249 11 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  13. Published

    Machine Learning and Data Mining for Sports Analytics: 5th International Workshop, MLSA 2018, colocated with ECML/PKDD 2018, Dublin, Ireland, September 10, 2018, Proceedings

    Brefeld, U. (Editor), Davis, J. (Editor), Van Haaren, J. (Editor) & Zimmermann, A. (Editor), 05.04.2019, Springer Nature. 179 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11330 LNAI)

    Research output: Books and anthologiesCollected editions and anthologiesResearch

  14. Published

    Learning to Rate Player Positioning in Soccer

    Dick, U. & Brefeld, U., 01.03.2019, In: Big Data. 7, 1, p. 71-82 12 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  15. Published

    The Impact of Digitalization on the IT Department

    Urbach, N., Ahlemann, F., Böhmann, T., Drews, P., Brenner, W., Schaudel, F. & Schütte, R., 12.02.2019, In: Business and Information Systems Engineering. 61, 1, p. 123-131 9 p.

    Research output: Journal contributionsComments / Debate / ReportsResearch

  16. Published

    Reformstudie Belgien: eine Effektstudie zur Einführung von kompetenzorientiertem Rahmenplan und mBook

    Schreiber, W., Trautwein, U., Wagner, W. & Brefeld, U., 01.02.2019, Geschichtsdidaktischer Zwischenhalt: Beiträge aus der Tagung "Kompetent machen für ein Leben in, mit und durch Geschichte" in Eichstätt vom November 2017. Schreiber, W., Ziegler, B. & Kühberger, C. (eds.). 1. ed. Münster: Waxmann Verlag, p. 161-174 14 p. 2

    Research output: Contributions to collected editions/worksContributions to collected editions/anthologiesResearch

  17. Published

    Frame-based Optimal Design

    Mair, S., Rudolph, Y., Closius, V. & Brefeld, U., 23.01.2019, Machine learning and knowledge discovery in databases: European Conference, ECML PKDD 2018, Dublin, Ireland, September 10-14, 2018 : proceedings. Berlingerio, M., Bonchi, F., Gärtner, T., Hurley, N. & Ifrim, G. (eds.). Cham: Springer Nature, Vol. 2. p. 447-463 17 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11052 LNAI).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  18. Published

    Probabilistic movement models and zones of control

    Brefeld, U., Lasek, J. & Mair, S., 15.01.2019, In: Machine Learning. 108, 1, p. 127-147 21 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  19. Published

    Heterogeneity Matters: Predicting Self-Esteem in Online Interventions Based on Ecological Momentary Assessment Data

    Bremer, V., Funk, B. & Riper, H., 13.01.2019, In: Depression Research and Treatment. 2019, 9 p., 3481624.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  20. Published

    Enhancing the Building Information Modeling Lifecycle of Complex Structures with IoT: Phases, Capabilities and Use Cases

    Gebken, L., Drews, P. & Schirmer, I., 08.01.2019, Proceedings of the 52nd Annual Hawaii International Conference on System Sciences, HICSS 2019. Bui, T. X. (ed.). Honolulu: University of Hawaii at Manoa, p. 5929-5938 10 p. (Proceedings of the Annual Hawaii International Conference on System Sciences; vol. 2019-January).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  21. Published

    A Privacy-driven Enterprise Architecture Meta-Model for Supporting Compliance with the General Data Protection Regulation

    Burmeister, F., Drews, P. & Schirmer, I., 01.01.2019, Proceedings of the 52nd Annual Hawaii International Conference on System Sciences, HICSS 2019. Bui, T. X. (ed.). Honolulu: University of Hawaii at Manoa, p. 6052-6061 10 p. (Proceedings of the Annual Hawaii International Conference on System Sciences; vol. 2019-January).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  22. Published

    Possibilities to improve online mental health treatment: Recommendations for future research and developments

    Becker, D., 01.01.2019, Advances in Information and Communication Networks: Proceedings of the 2018 Future of Information and Communication Conference FICC, Vol. 1. Arai, K., Kapoor, S. & Bhatia, R. (eds.). Springer Verlag, p. 91-112 22 p. (Advances in Intelligent Systems and Computing; vol. 886).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  23. QUANT - Question Answering Benchmark Curator

    Gusmita, R. H., Jalota, R., Vollmers, D., Reineke, J., Ngonga Ngomo, A. C. & Usbeck, R., 01.01.2019, Semantic Systems. The Power of AI and Knowledge Graphs - 15th International Conference, SEMANTiCS 2019 Proceedings. Acosta, M., Sure-Vetter, Y., Cudré-Mauroux, P., Maleshkova, M., Pellegrini, T. & Sack, H. (eds.). Springer Verlag, p. 343-358 16 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11702 LNCS).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  24. Published

    Simulated annealing approach to nurse rostering benchmark and real-world instances

    Knust, F. & Xie, L., 01.01.2019, In: Annals of Operations Research. 272, 1-2, p. 187-216 30 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  25. Published

    Agile Portfolio Management: Design Goals and Principles

    Horlach, B., Schirmer, I. & Drews, P., 2019, Proceedings of the 27th European Conference on Information Systems (ECIS) 2019. vom Brocke, J., Gregor, S. & Müller, O. (eds.). Stockholm, Sweden: The Association for Information Systems (AIS), 17 p.

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  26. Published

    An Ecosystem Architecture Meta-Model for Supporting Ultra-Large Scale Digital Transformations

    Burmeister, F., Drews, P. & Schirmer, I., 2019, 25th Americas Conference on Information Systems, AMCIS 2019: Cancún, Mexico, August 15-17, 2019. Atlanta: The Association for Information Systems (AIS), 10 p. (Proceedings of the Americas Conference on Information Systems (AMCIS); vol. 2019).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  27. Published

    A two-step approach for the prediction of mood levels based on diary data

    Bremer, V., Becker, D., Genz, T., Funk, B. & Lehr, D., 2019, Machine Learning and Knowledge Discovery in Databases - European Conference, ECML PKDD 2018, Proceedings: European Conference, ECML PKDD 2018, Dublin, Ireland. Brefeld, U., Curry, E., Daly, E., MacNamee, B., Marascu, A., Pinelli, F., Berlingerio, M. & Hurley, N. (eds.). Cham: Springer International Publishing, p. 626-629 4 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11053 LNAI).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  28. Benchmarking question answering systems

    Usbeck, R., Röder, M., Hoffmann, M., Conrads, F., Huthmann, J., Ngonga-Ngomo, A. C., Demmler, C. & Unger, C., 2019, In: Semantic Web. 10, 2, p. 293-304 12 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  29. Published

    DISKNET – A Platform for the Systematic Accumulation of Knowledge in IS Research

    Dann, D., Maedche, A., Teubner, T., Mueller, B., Meske, C. & Funk, B., 2019, ICIS 2019 Proceedings: IS research methods, theorizing and philosophy of science. The Association for Information Systems (AIS), 9 p. Paper ID 2785. (40th International Conference on Information Systems, ICIS 2019).

    Research output: Contributions to collected editions/worksPublished abstract in conference proceedingsResearchpeer-review

  30. Published

    Efficient Order Picking Methods in Robotic Mobile Fulfillment Systems

    Xie, L., Thieme, N., Krenzler, R. & Li, H., 2019, 31 p.

    Research output: Working paperWorking papers

  31. Published

    Machine Learning and Knowledge Discovery in Databases: European Conference, ECML PKDD 2018, Dublin, Ireland, September 10-14, 2018, Proceedings - Part III

    Brefeld, U. (Editor), Curry , E. (Editor), Daly, E. (Editor), MacNamee, B. (Editor), Marascu, A. (Editor), Pinelli , F. (Editor), Berlingerio, M. (Editor) & Hurley, N. (Editor), 2019, Cham: Springer Verlag. 706 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 11054 LNAI)

    Research output: Books and anthologiesCollected editions and anthologiesResearch

  32. Navigating in the Digital Jungle: Articulating Combinatory Affordances of Digital Infrastructures for Collaboration

    Zimmer, M. P. & Niemimaa, M., 2019, PACIS 2019 Proceedings: Secure ICT Platform for the 4th Industrial Revolution. Xu, D., Jiang, J. & Kim, H.-W. (eds.). AIS eLibrary, 14 p. 209

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  33. Proceedings of the posters and demo track of the 15th international conference on semantic systems. 9th - 12th of September 2019, Karlsruhe, Germany

    Alam, M. (Editor), Usbeck, R. (Editor), Pellegrini, T. (Editor), Sack, H. (Editor) & Sure-Vetter, Y. (Editor), 2019, Sun Site Central Europe (RWTH Aachen University). (CEUR Workshop Proceedings; vol. 2451)

    Research output: Books and anthologiesConference proceedingsResearch

  34. Simple Mouse Attribute Analysis

    Matthiesen, J. & Holte, M. B., 2019, HCI in Business, Government and Organizations. Information Systems and Analytics: 6th International Conference, HCIBGO 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26-31, 2019, Proceedings, Part II. Fui-Hoon Nah, F. & Siau, K. (eds.). Cham: Springer Verlag, Vol. 2. p. 95-113 19 p. (Lecture Notes in Computer Science; vol. 11589).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  35. Published

    Topic Embeddings – A New Approach to Classify Very Short Documents Based on Predefined Topics

    Lommel, L., Riebeling, M., Funk, B. & Junginger, C., 2019, Human Practice. Digital Ecologies. Our Future: 14. Internationale Tagung Wirtschaftsinformatik (WI 2019), Tagungsband . Ludwig, T. & Pipek, V. (eds.). Siegen: Universitätsverlag Siegen, p. 453-467 15 p.

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  36. To Row Together or Paddle One's Own Canoe? Simulating Strategies to Spur Digital Platform Growth

    Mikolon, J., Hoffmann, D., Greulich, M. & Werner, M., 2019, ECIS 2019 Proceedings. Atlanta: AIS eLibrary

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  37. BENGAL: An automatic benchmark generator for entity recognition and linking

    Ngomo, A. C. N., Röder, M., Moussallem, D., Usbeck, R. & Speck, R., 01.11.2018, INLG 2018 - 11th International Natural Language Generation Conference, Proceedings of the Conference. Krahmer, E., Gatt, A. & Goudbeek, M. (eds.). Association for Computational Linguistics (ACL), p. 339-349 11 p. (INLG 2018 - 11th International Natural Language Generation Conference, Proceedings of the Conference).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  38. When You Share, You Should Care: Examining the Role of Perspective-Taking on Social Networking Sites

    Wagner, A., Abramova, O., Krasnova, H. & Buxmann, P., 11.2018, Twenty-Sixth European Conference on Information Systems (ECIS2018), Portsmouth,UK, 2018. Atlanta: The Association for Information Systems (AIS), 174

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  39. Published

    Herausforderungen in der Wirtschaftsprüfung durch den Einsatz von Big Data-Technologien: Welche Impulse muss die Prüfungsforschung geben?

    Velte, P. & Drews, P., 26.10.2018, In: Der Betrieb. 71, 43, p. 2581-2585 5 p.

    Research output: Journal contributionsJournal articlesTransfer

  40. Published

    Deterministic Pod Repositioning in Robotic Mobile Fulfillment Systems

    Krenzler, R., Xie, L. & Li, H., 09.10.2018, 37 p. (ArXiv.org).

    Research output: Working paperWorking papers

  41. 8th challenge on question answering over linked data (QALD-8)

    Usbeck, R., Ngomo, A. C. N., Conrads, F., Röder, M. & Napolitano, G., 10.2018, SemDeep-4_NLIWOD-4 2018: Joint Proceedings of ISWC 2018 Workshops SemDeep-4 and NLIWOD-4. Choi, K.-S., Anke, L. E., Decklerck, T., Gromann, D., Kim, J.-D., Ngomo, A.-C. N., Saleem, M. & Usbeck, R. (eds.). Sun Site Central Europe (RWTH Aachen University), Vol. 2241. p. 51-57 7 p. (CEUR Workshop Proceedings; vol. 2241).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  42. 9th challenge on question answering over linked data (QALD-9)

    Usbeck, R., Gusmita, R. H., Ngomo, A. C. N. & Saleem, M., 10.2018, SemDeep-4_NLIWOD-4 2018: Joint Proceedings of ISWC 2018 Workshops SemDeep-4 and NLIWOD-4. Choi, K.-S., Anke, L. E., Decklerck, T., Gromann, D., Kim, J.-D., Ngomo, A.-C. N., Saleem, M. & Usbeck, R. (eds.). Sun Site Central Europe (RWTH Aachen University), Vol. 2241. p. 58-64 7 p. (CEUR Workshop Proceedings; vol. 2241).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  43. Published

    Predicting Therapy Success and Costs for Personalized Treatment Recommendations Using Baseline Characteristics: Data-Driven Analysis

    Bremer, V., Becker, D., Kolovos, S., Funk, B., van Breda, W., Hoogendoorn, M. & Riper, H., 21.08.2018, In: Journal of Medical Internet Research. 20, 8, 11 p., e10275.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  44. Published

    Adaptive Item Selection Under Matroid Constraints

    Bengs, D., Brefeld, U. & Kröhne, U., 07.08.2018, In: Journal of Computerized Adaptive Testing. 6, 2, p. 15-36 22 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  45. Published

    Towards an Extended Enterprise Architecture Meta-Model for Big Data: A Literature-based Approach

    Burmeister, F., Drews, P. & Schirmer, I., 08.2018, Americas Conference on Information Systems 2018: Digital Disruption, AMCIS 2018. The Association for Information Systems (AIS), 10 p. (Proceedings of the Americas Conference on Information Systems (AMCIS); vol. 2018).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  46. Published

    Predicting Therapy Success For Treatment as Usual and Blended Treatment in the Domain of Depression

    van Breda, W. R. J., Bremer, V., Becker, D., Funk, B., Ruwaard, J. & Riper, H., 01.06.2018, In: Internet Interventions. 12, p. 100-104 5 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  47. Published

    Predictive modeling in e-mental health: A common language framework

    Becker, D., van Breda, W., Funk, B., Hoogendoorn, M., Ruwaard, J. & Riper, H., 01.06.2018, In: Internet Interventions. 12, Juni 2018, p. 57-67 11 p.

    Research output: Journal contributionsScientific review articlesResearch

  48. Published

    Distributed robust Gaussian Process regression

    Mair, S. & Brefeld, U., 01.05.2018, In: Knowledge and Information Systems. 55, 2, p. 415-435 21 p.

    Research output: Journal contributionsJournal articlesResearchpeer-review

  49. Enhancing Community Interactions with Data-Driven Chatbots - The DBpedia Chatbot

    Athreya, R. G., Ngonga Ngomo, A. C. & Usbeck, R., 23.04.2018, The Web Conference 2018 - Companion of the World Wide Web Conference, WWW 2018. Champin, P.-A., Gandon, F. & Medini, L. (eds.). Association for Computing Machinery, Inc, p. 143-146 4 p. (The Web Conference 2018 - Companion of the World Wide Web Conference, WWW 2018).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

  50. Question Answering Mediated by Visual Clues and Knowledge Graphs

    Faria, F. F., Usbeck, R., Sarullo, A., Mu, T. & Freitas, A., 23.04.2018, The Web Conference 2018 - Companion of the World Wide Web Conference, WWW 2018. Association for Computing Machinery, Inc, p. 1937-1939 3 p. (The Web Conference 2018 - Companion of the World Wide Web Conference, WWW 2018; vol. 2018-January).

    Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

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