Pub­lic­a­tions

Universal Knowledge Graph Embeddings

N.J. KOUAGOU, C. Demir, H.M.A. Zahera, A. Wilke, S. Heindorf, J. Li, A.-C. Ngonga Ngomo, in: Companion Proceedings of the ACM on Web Conference 2024, ACM, 2024.


ESLM: Improving Entity Summarization by Leveraging Language Models

A.F. Firmansyah, D. Moussallem, A.-C. Ngonga Ngomo, in: The Semantic Web, Springer Nature Switzerland, Cham, 2024.


Computing Repairs Under Functional and Inclusion Dependencies via Argumentation

Y. Mahmood, J. Virtema, T. Barlag, A.-C. Ngonga Ngomo, in: Lecture Notes in Computer Science, Springer Nature Switzerland, Cham, 2024.


Quantitative Claim-Centric Reasoning in Logic-Based Argumentation

M. Hecher, Y. Mahmood, A. Meier, J. Schmidt, in: Proceedings of the Thirty-ThirdInternational Joint Conference on Artificial Intelligence, International Joint Conferences on Artificial Intelligence Organization, 2024.


Parameterized Complexity of Weighted Team Definability

J. Kontinen, Y. Mahmood, A. Meier, H. Vollmer, Mathematical Structures in Computer Science (2024) 1–15.


Beyond One-Shot Explanations: A Systematic Literature Review of Dialogue-Based XAI Approaches

D. Mindlin, F. Beer, L.N. Sieger, S. Heindorf, P. Cimiano, E. Esposito, A.-C. Ngonga Ngomo, (2024).


EDGE: Evaluation Framework for Logical vs. Subgraph Explanations for Node Classifiers on Knowledge Graphs

R. Sapkota, D. Köhler, S. Heindorf, in: Proceedings of the 33rd ACM International Conference on Information and Knowledge Management (CIKM ’24), ACM, Boise, Idaho, USA, 2024.


AutoCL: AutoML for Concept Learning

J. Li, S. Satheesh, S. Heindorf, D. Moussallem, R. Speck, A.-C. Ngonga Ngomo, in: Communications in Computer and Information Science, Springer Nature Switzerland, Cham, 2024.


Rejection in Abstract Argumentation: Harder Than Acceptance?

J.K. Fichte, M. Hecher, Y. Mahmood, A. Meier, in: Frontiers in Artificial Intelligence and Applications, IOS Press, 2024.


Evaluating Negation with Multi-way Joins Accelerates Class Expression Learning

N. Karalis, A. Bigerl, C. Demir, L. Heidrich, A.-C. Ngonga Ngomo, in: Lecture Notes in Computer Science, Springer Nature Switzerland, Cham, 2024.


Class Expression Learning with Multiple Representations

A.-C. Ngonga Ngomo, C. Demir, N.J. Kouagou, S. Heindorf, N. Karalis, A. Bigerl, in: Compendium of Neurosymbolic Artificial Intelligence, IOS Press, 2023, pp. 272–286.


LitCQD: Multi-Hop Reasoning in Incomplete Knowledge Graphs with Numeric Literals

C. Demir, M. Wiebesiek, R. Lu, A.-C. Ngonga Ngomo, S. Heindorf, ECML PKDD (2023).


Neural Class Expression Synthesis in ALCHIQ(D)

N.J. Kouagou, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: Machine Learning and Knowledge Discovery in Databases: Research Track, Springer Nature Switzerland, Cham, 2023.


Explaining ELH Concept Descriptions through Counterfactual Reasoning

L.N. Sieger, S. Heindorf, L. Blübaum, A.-C. Ngonga Ngomo, ArXiv:2301.05109 (2023).


A Topic Model for the Data Web

M. Röder, D. Kuchelev, A.-C. Ngonga Ngomo, in: F. Ortiz-Rodriguez, B. Villazón-Terrazas, S. Tiwari, C. Bobed (Eds.), Knowledge Graphs and Semantic Web, Springer Nature Switzerland, Cham, 2023, pp. 183–198.


Explainable Integration of Knowledge Graphs Using Large Language Models

A.F.A. Ahmed, A.F. Firmansyah, M. Sherif, D. Moussallem, A.-C. Ngonga Ngomo, in: Natural Language Processing and Information Systems, Springer Nature Switzerland, Cham, 2023.


Unsupervised Relation Extraction with Sentence level Distributional Semantics

A. Manzoor, M. Saleem, A.-C. Ngonga Ngomo, in: 2023 IEEE 17th International Conference on Semantic Computing (ICSC), 2023, pp. 274–277.


Automating the Discovery of Linking Candidates

M. Röder, Automating the Discovery of Linking Candidates, Paderborn University, 2023.


Neural Class Expression Synthesis (Extended Abstract)

N.J. KOUAGOU, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: NeSy 2023, 17th International Workshop on Neural-Symbolic Learning and Reasoning, Certosa Di Pontignano, Siena, Italy, CEUR-WS, 2023.


Using Pre-trained Language Models for Abstractive DBPEDIA Summarization: A Comparative Study

H.M.A. Zahera, F. Vitiugin, M. Sherif, C. Castillo, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.


LauNuts: A Knowledge Graph to identify and compare geographic regions in the European Union

A. Wilke, A.-C. Ngonga Ngomo, in: The Semantic Web (ESWC 2023), 2023.


Native Execution of GraphQL Queries over RDF Graphs Using Multi-way Joins

N. Karalis, A. Bigerl, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.


Parameterized Complexity of Logic-based Argumentation in Schaefer’s Framework

Y. Mahmood, A. Meier, J. Schmidt, ACM Transactions on Computational Logic 24 (2023) 1–25.


Quantitative Reasoning and Structural Complexity for Claim-Centric Argumentation

J.K. Fichte, M. Hecher, Y. Mahmood, A. Meier, in: Proceedings of the Thirty-Second International Joint Conference on Artificial Intelligence, International Joint Conferences on Artificial Intelligence Organization, 2023.


Parameterized Complexity of Propositional Inclusion and Independence Logic

Y. Mahmood, J. Virtema, in: Logic, Language, Information, and Computation, Springer Nature Switzerland, Cham, 2023.


Logics with probabilistic team semantics and the Boolean negation

M. Hannula, M. Hirvonen, J. Kontinen, Y. Mahmood, A. Meier, J. Virtema, in: 18th European Conference on Logics in Artificial Intelligence, JELIA 2023, Proceedings, 2023.


Configuration and Evaluation

J.M. Hanselle, E. Hüllermeier, F. Mohr, A.-C. Ngonga Ngomo, M. Sherif, A. Tornede, M.D. Wever, in: C.-J. Haake, F. Meyer auf der Heide, M. Platzner, H. Wachsmuth, H. Wehrheim (Eds.), On-The-Fly Computing – Individualized IT-Services in Dynamic Markets, Heinz Nixdorf Institut, Universität Paderborn, 2023, pp. 85–104.


Lingua Franca - Entity-Aware Machine Translation Approach for Question Answering over Knowledge Graphs

N. Srivastava, A. Perevalov, D. Kuchelev, D. Moussallem, A.-C. Ngonga Ngomo, A. Both, in: K.B. Venable, D. Garijo, B. Jalaian (Eds.), Proceedings of the 12th Knowledge Capture Conference 2023, {K-CAP} 2023, Pensacola, FL, USA, December 5-7, 2023, ACM, 2023, pp. 122–130.


Learning Permutation-Invariant Embeddings for Description Logic Concepts

C. Demir, A.-C. Ngonga Ngomo, in: Advances in Intelligent Data Analysis XXI: 21st International Symposium on Intelligent Data Analysis, IDA 2023, Louvain-La-Neuve, Belgium, April 12–14, 2023, Proceedings, 2023, pp. 103–115.


COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge Graphs

A. Becker, A.F.A. Ahmed, M. Sherif, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.


RELD: A Knowledge Graph of Relation Extraction Datasets

A. Manzoor, M. Saleem, D. Moussallem, M.A. Sherif, A.-C. Ngonga Ngomo, in: The Semantic Web, Springer Nature Switzerland, Cham, 2023.


IngridKG: A FAIR Knowledge Graph of Graffiti

M.A. Sherif, A.A.M. da Silva, S. Pestryakova, A.F. Ahmed, S. Niemann, A.-C.N. Ngomo, Scientific Data 10 (2023).


Neural Class Expression Synthesis

N.J. KOUAGOU, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: C. Pesquita, E. Jimenez-Ruiz, J. McCusker, D. Faria, M. Dragoni, A. Dimou, R. Troncy, S. Hertling (Eds.), The Semantic Web - 20th Extended Semantic Web Conference (ESWC 2023), Springer International Publishing, 2023, pp. 209–226.


Neuro-Symbolic Class Expression Learning

C. Demir, A.-C. Ngonga Ngomo, International Joint Conference on Artificial Intelligence (2023).


Mit dem Leben Schritt halten - Eine Analyse des Wearable-Dispositivs

F.M. Schloots, Mit dem Leben Schritt halten - Eine Analyse des Wearable-Dispositivs, Springer Fachmedien Wiesbaden, Wiesbaden, 2023.


IndQNER: Named Entity Recognition Benchmark Dataset from the Indonesian Translation of the Quran

R.H. Gusmita, A.F. Firmansyah, D. Moussallem, A.-C. Ngonga Ngomo, in: Natural Language Processing and Information Systems, Springer Nature Switzerland, Cham, 2023.


MultPAX: Keyphrase Extraction Using Language Models and Knowledge Graphs

H.M. Zahera, D. Vollmers, M.A. Sherif, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, C.M. Keet, V. Presutti, J.P.A. Almeida, H. Takeda, P. Monnin, G. Pirrò, C. d’Amato (Eds.), The Semantic Web - ISWC 2022 - 21st International Semantic Web Conference, Virtual Event, October 23-27, 2022, Proceedings, Springer, 2022, pp. 303–318.


Can Machine Translation be a Reasonable Alternative for Multilingual Question Answering Systems over Knowledge Graphs?

A. Perevalov, A. Both, D. Diefenbach, A.-C. Ngonga Ngomo, in: F. Laforest, R. Troncy, E. Simperl, D. Agarwal, A. Gionis, I. Herman, L. Médini (Eds.), WWW ’22: The ACM Web Conference 2022, Virtual Event, Lyon, France, April 25 - 29, 2022, ACM, 2022, pp. 977–986.


Proceedings of the QuWeDa 2022: 6th Workshop on Storing, Querying and Benchmarking Knowledge Graphs co-located with 21st International Semantic Web Conference (ISWC 2022), Hangzhou, China, 23-27 October 2022

M. Saleem, A.-C. Ngonga Ngomo, DE, eds., Proceedings of the QuWeDa 2022: 6th Workshop on Storing, Querying and Benchmarking Knowledge Graphs Co-Located with 21st International Semantic Web Conference (ISWC 2022), Hangzhou, China, 23-27 October 2022, CEUR-WS.org, 2022.


Hashing the Hypertrie: Space- and Time-Efficient Indexing for SPARQL in Tensors

A. Bigerl, L. Conrads, C. Behning, M. Saleem, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, C.M. Keet, V. Presutti, J.P.A. Almeida, H. Takeda, P. Monnin, G. Pirrò, C. d’Amato (Eds.), The Semantic Web - ISWC 2022 - 21st International Semantic Web Conference, Virtual Event, October 23-27, 2022, Proceedings, Springer, 2022, pp. 57–73.


REBench: Microbenchmarking Framework for Relation Extraction Systems

M. Ali, M. Saleem, A.-C. Ngonga Ngomo, in: U. Sattler, A. Hogan, C.M. Keet, V. Presutti, J.P.A. Almeida, H. Takeda, P. Monnin, G. Pirrò, C. d’Amato (Eds.), The Semantic Web - ISWC 2022 - 21st International Semantic Web Conference, Virtual Event, October 23-27, 2022, Proceedings, Springer, 2022, pp. 643–659.


Rapid Explainability for Skill Description Learning

C. Demir, A. Himmelhuber, Y. Liu, A. Bigerl, D. Moussallem, A.-C. Ngonga Ngomo, in: A. Dimou, A. Haller, A.L. Gentile, P. Ristoski (Eds.), Proceedings of the ISWC 2022 Posters, Demos and Industry Tracks: From Novel Ideas to Industrial Practice Co-Located with 21st International Semantic Web Conference {(ISWC} 2022), Virtual Conference, Hangzhou, China, October 23-27, 2022, CEUR-WS.org, 2022.


LSQ Framework: The LSQ Framework for SPARQL Query Log Processing

C. Stadler, M. Saleem, A.-C. Ngonga Ngomo, in: M. Saleem, A.-C.N. Ngomo (Eds.), Proceedings of the QuWeDa 2022: 6th Workshop on Storing, Querying and Benchmarking Knowledge Graphs Co-Located with 21st International Semantic Web Conference {(ISWC} 2022), Hangzhou, China, 23-27 October 2022, CEUR-WS.org, 2022, pp. 49–64.


Kronecker Decomposition for Knowledge Graph Embeddings

C. Demir, J. Lienen, A.-C. Ngonga Ngomo, in: A. Bellogín, L. Boratto, F. Cena (Eds.), HT ’22: 33rd ACM Conference on Hypertext and Social Media, Barcelona, Spain, 28 June 2022- 1 July 2022, ACM, 2022, pp. 1–10.


Enhancing the Accessibility of Knowledge Graph Question Answering Systems through Multilingualization

A. Perevalov, A.-C. Ngonga Ngomo, A. Both, in: 16th IEEE International Conference on Semantic Computing, ICSC 2022, Laguna Hills, CA, USA, January 26-28, 2022, IEEE, 2022, pp. 251–256.


Tab2Onto: Unsupervised Semantification with Knowledge Graph Embeddings

H.M. Zahera, S. Heindorf, S. Balke, J. Haupt, M. Voigt, C. Walter, F. Witter, A.-C. Ngonga Ngomo, in: P. Groth, A. Rula, J. Schneider, I. Tiddi, E. Simperl, P. Alexopoulos, R. Hoekstra, M. Alam, A. Dimou, M. Tamper (Eds.), The Semantic Web: ESWC 2022 Satellite Events - Hersonissos, Crete, Greece, May 29 - June 2, 2022, Proceedings, Springer, 2022, pp. 47–51.


CausalQA: A Benchmark for Causal Question Answering

A. Bondarenko, M. Wolska, S. Heindorf, L. Blübaum, A.-C. Ngonga Ngomo, B. Stein, P. Braslavski, M. Hagen, M. Potthast, in: N. Calzolari, C.-R. Huang, H. Kim, J. Pustejovsky, L. Wanner, K.-S. Choi, P.-M. Ryu, H.-H. Chen, L. Donatelli, H. Ji, S. Kurohashi, P. Paggio, N. Xue, S. Kim, Y. Hahm, Z. He, T.K. Lee, E. Santus, F. Bond, S.-H. Na (Eds.), Proceedings of the 29th International Conference on Computational Linguistics, COLING 2022, Gyeongju, Republic of Korea, October 12-17, 2022, International Committee on Computational Linguistics, 2022, pp. 3296–3308.


Knowledge Graphs

A. Hogan, E. Blomqvist, M. Cochez, C. d’Amato, G. de Melo, C. Gutierrez, S. Kirrane, J.E.L. Gayo, R. Navigli, S. Neumaier, A.-C. Ngonga Ngomo, A. Polleres, S.M. Rashid, A. Rula, L. Schmelzeisen, J.F. Sequeda, S. Staab, A. Zimmermann, ACM Comput. Surv. 54 (2022) 71:1–71:37.


A survey of RDF stores & SPARQL engines for querying knowledge graphs

W. Ali, M. Saleem, B. Yao, A. Hogan, A.-C. Ngonga Ngomo, VLDB J. 31 (2022) 1–26.


Hardware-agnostic computation for large-scale knowledge graph embeddings

C. Demir, A.-C. Ngonga Ngomo, Softw. Impacts 13 (2022) 100377.


AI-Based Assistance System for Manufacturing

S. Deppe, L. Brandt, M. Brünninghaus, J. Papenkordt, S. Heindorf, G. Tschirner-Vinke, (2022).


Learning Concept Lengths Accelerates Concept Learning in ALC

N.J. KOUAGOU, S. Heindorf, C. Demir, A.-C. Ngonga Ngomo, in: The Semantic Web, Springer International Publishing, Cham, 2022.


EvoLearner: Learning Description Logics with Evolutionary Algorithms

S. Heindorf, L. Blübaum, N. Düsterhus, T. Werner, V.N. Golani, C. Demir, A.-C. Ngonga Ngomo, in: WWW, ACM, 2022, pp. 818–828.


CovidPubGraph: A FAIR Knowledge Graph of COVID-19 Publications

S. Pestryakova, D. Vollmers, M. Sherif, S. Heindorf, M. Saleem, D. Moussallem, A.-C. Ngonga Ngomo, Scientific Data (2022).


User Involvement in Training Smart Home Agents

L.N. Sieger, J. Hermann, A. Schomäcker, S. Heindorf, C. Meske, C.-C. Hey, A. Doğangün, in: International Conference on Human-Agent Interaction, ACM, 2022.


REBench: Microbenchmarking Framework for Relation Extraction Systems

A. Manzoor, M. Saleem, A.-C. Ngonga Ngomo, in: The Semantic Web – ISWC 2022, Springer International Publishing, Cham, 2022.


Tab2Onto: Unsupervised Semantification with Knowledge Graph Embeddings

H.M.A. Zahera, S. Heindorf, S. Balke, J. Haupt, M. Voigt, C. Walter, F. Witter, A.-C. Ngonga Ngomo, in: The Semantic Web: ESWC 2022 Satellite Events, Springer International Publishing, Cham, 2022.


CausalQA: A Benchmark for Causal Question Answering

A. Bondarenko, M. Wolska, S. Heindorf, L. Blübaum, A.-C. Ngonga Ngomo, B. Stein, P. Braslavski, M. Hagen, M. Potthast, in: Proceedings of the 29th International Conference on Computational Linguistics, International Committee on Computational Linguistics, Gyeongju, Republic of Korea, 2022, pp. 3296–3308.


Die Tamagotchisierung des Selbst. Zur Anschaulichkeit von animierten Körperdaten

F.M. Schloots, Rabbit Eye - Zeitschrift für Filmforschung 12 (2022) 65–77.



Multilingual Verbalization and Summarization for Explainable Link Discovery

A. Fathi Ahmed, M. Ahmed Sherif, D. Moussallem, A.-C. Ngonga Ngomo, Data Knowl. Eng. 133 (2021) 101874.


Applying Grammar-Based Compression to RDF

M. Röder, P. Frerk, F. Conrads, A.-C. Ngonga Ngomo, in: R. Verborgh, K. Hose, H. Paulheim, P.-A. Champin, M. Maleshkova, O. Corcho, P. Ristoski, M. Alam (Eds.), The Semantic Web - 18th International Conference, {ESWC} 2021, Virtual Event, June 6-10, 2021, Proceedings, Springer, 2021, pp. 93–108.


Unsupervised Relation Extraction Using Sentence Encoding

M. Ali, M. Saleem, A.-C. Ngonga Ngomo, in: R. Verborgh, A. Dimou, A. Hogan, C. d’Amato, I. Tiddi, A. Br{\"{o}}ring, S. Maier, F. Ongenae, R. Tommasini, M. Alam (Eds.), The Semantic Web: {ESWC} 2021 Satellite Events - Virtual Event, June 6-10, 2021, Revised Selected Papers, Springer, 2021, pp. 136–140.


Unsupervised Relation Extraction Using Sentence Encoding

M. Ali, M. Saleem, A.-C. Ngonga Ngomo, in: R. Verborgh, A. Dimou, A. Hogan, C. d’Amato, I. Tiddi, A. Br{\"{o}}ring, S. Maier, F. Ongenae, R. Tommasini, M. Alam (Eds.), The Semantic Web: {ESWC} 2021 Satellite Events - Virtual Event, June 6-10, 2021, Revised Selected Papers, Springer, 2021, pp. 136–140.


InferNER: an attentive model leveraging the sentence-level information for Named Entity Recognition in Microblogs

M. Shahzad, A. Amin, D. Esteves, A.-C. Ngonga Ngomo, in: E. Bell, F. Keshtkar (Eds.), Proceedings of the Thirty-Fourth International Florida Artificial Intelligence Research Society Conference, North Miami Beach, Florida, USA, May 17-19, 2021, 2021.


Lemming - Example-based Mimicking of Knowledge Graphs

M. Röder, P. Thuy Sy Nguyen, F. Conrads, A. Alexandra Morim da Silva, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 62–69.


SYNTHG: Mimicking RDF Graphs Using Tensor Factorization

A. Amer Desouki, F. Conrads, M. Röder, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 76–79.


A shallow neural model for relation prediction

C. Demir, D. Moussallem, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 179–182.


Template-based Question Answering using Recursive Neural Networks

R. G. Athreya, S. Kona Bansal, A.-C. Ngonga Ngomo, R. Usbeck, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 195–198.


LAUREN - Knowledge Graph Summarization for Question Answering

R. Jalota, D. Vollmers, D. Moussallem, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 221–226.


Relicensing Combined Datasets

A. Wilke, A. Bannoura, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 241–247.


ORCA - a Benchmark for Data Web Crawlers

M. Röder, G. de Souza, D. Kuchelev, A. Amer Desouki, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 272–279.


Using Compositional Embeddings for Fact Checking

A. Alexandra Morim da Silva, M. Röder, A.-C. Ngonga Ngomo, in: A. Hotho, E. Blomqvist, S. Dietze, A. Fokoue, Y. Ding, P. M. Barnaghi, A. Haller, M. Dragoni, H. Alani (Eds.), The Semantic Web - {ISWC} 2021 - 20th International Semantic Web Conference, {ISWC} 2021, Virtual Event, October 24-28, 2021, Proceedings, Springer, 2021, pp. 270–286.


Convolutional Complex Knowledge Graph Embeddings

C. Demir, A.-C. Ngonga Ngomo, in: R. Verborgh, K. Hose, H. Paulheim, P.-}Antoine Champin, M. Maleshkova, O. Corcho, P. Ristoski, M. Alam (Eds.), The Semantic Web - 18th International Conference, {ESWC} 2021, Virtual Event, June 6-10, 2021, Proceedings, Springer, 2021, pp. 409–424.


Twitter Network Mimicking for Data Storage Benchmarking

R. Speck, D. Moussallem, A.-C. Ngonga Ngomo, in: 15th {IEEE} International Conference on Semantic Computing, {ICSC} 2021, Laguna Hills, CA, USA, January 27-29, 2021, {IEEE}, 2021, pp. 298–305.


A shallow neural model for relation prediction

C. Demir, D. Moussallem, A.-C. Ngonga Ngomo, CoRR abs/2101.09090 (2021).


A Survey of RDF Stores \& SPARQL Engines for Querying Knowledge Graphs

W. Ali, M. Saleem, B. Yao, A. Hogan, A.-C. Ngonga Ngomo, CoRR abs/2102.13027 (2021).


Knowledge Graph Question Answering using Graph-Pattern Isomorphism

D. Vollmers, R. Jalota, D. Moussallem, H. Topiwala, A.-C. Ngonga Ngomo, R. Usbeck, CoRR abs/2103.06752 (2021).


MLCheck- Property-Driven Testing of Machine Learning Models

A. Sharma, C. Demir, A.-C. Ngonga Ngomo, H. Wehrheim, CoRR abs/2105.00741 (2021).


Open Data Portal Germany (OPAL) Projektergebnisse

A. Wilke, A.-C. Ngonga Ngomo, CoRR abs/2105.03161 (2021).


Out-of-Vocabulary Entities in Link Prediction

C. Demir, A.-C. Ngonga Ngomo, CoRR abs/2105.12524 (2021).


DRILL- Deep Reinforcement Learning for Refinement Operators in ALC

C. Demir, A.-C. Ngonga Ngomo, CoRR abs/2106.15373 (2021).


MLCHECK–Property-Driven Testing of Machine Learning Classifiers

A. Sharma, C. Demir, A.-C. Ngonga Ngomo, H. Wehrheim, in: Proceedings of the 20th IEEE International Conference on Machine Learning and Applications (ICMLA), IEEE, n.d.


I-AID: Identifying Actionable Information From Disaster-Related Tweets

H. M. Zahera, R. Jalota, M. Ahmed Sherif, A.-C. Ngonga Ngomo, {IEEE} Access 9 (2021) 118861–118870.


Knowledge Graphs

A. Hogan, E. Blomqvist, M. Cochez, C. d’Amato, G. de Melo, C. Guti{\’{e}}rrez, S. Kirrane, J. Emilio Labra Gayo, R. Navigli, S. Neumaier, A.-C. Ngonga Ngomo, A. Polleres, S. M. Rashid, A. Rula, L. Schmelzeisen, J. F. Sequeda, S. Staab, A. Zimmermann, {ACM} Comput. Surv. 54 (2021) 71:1-71:37.


Drift Detection in Text Data with Document Embeddings

R. Feldhans, A. Wilke, S. Heindorf, M.H. Shaker, B. Hammer, A.-C. Ngonga Ngomo, E. Hüllermeier, in: Intelligent Data Engineering and Automated Learning – IDEAL 2021, Cham, 2021.


Relicensing Combined Datasets

A. Wilke, A. Bannoura, A.-C.N. Ngonga Ngomo, in: 2021 IEEE 15th International Conference on Semantic Computing (ICSC), 2021, pp. 241–247.


GATES: Using Graph Attention Networks for Entity Summarization

A.F. Firmansyah, D. Moussallem, A.-C. Ngonga Ngomo, in: Proceedings of the 11th on Knowledge Capture Conference, ACM, Virtual Event, USA, 2021, pp. 73–80.


Drift Detection in Text Data with Document Embeddings

R. Feldhans, A. Wilke, S. Heindorf, M.H. Shaker, B. Hammer, A.-C. Ngonga Ngomo, E. Hüllermeier, in: Intelligent Data Engineering and Automated Learning – IDEAL 2021, Springer International Publishing, Cham, 2021.


Convolutional Hypercomplex Embeddings for Link Prediction

C. Demir, D. Moussallem, S. Heindorf, A.-C. Ngonga Ngomo, in: The 13th Asian Conference on Machine Learning, ACML 2021, 2021.


Generating Physically Sound Training Data for Image Recognition of Additively Manufactured Parts

T. Nickchen, S. Heindorf, G. Engels, in: 2021 IEEE Winter Conference on Applications of Computer Vision (WACV), IEEE, 2021.


Explanation as a Social Practice: Toward a Conceptual Framework for the Social Design of AI Systems

K.J. Rohlfing, P. Cimiano, I. Scharlau, T. Matzner, H.M. Buhl, H. Buschmeier, E. Esposito, A. Grimminger, B. Hammer, R. Haeb-Umbach, I. Horwath, E. Hüllermeier, F. Kern, S. Kopp, K. Thommes, A.-C. Ngonga Ngomo, C. Schulte, H. Wachsmuth, P. Wagner, B. Wrede, IEEE Transactions on Cognitive and Developmental Systems 13 (2021) 717–728.


An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines

U. Qudus, M. Saleem, A.-C. Ngonga Ngomo, Y.-K. Lee, Semantic Web 12 (n.d.) 843–868.


ASSET: A Semi-supervised Approach for Entity Typing in Knowledge Graphs

H.M.A. Zahera, S. Heindorf, A.-C. Ngonga Ngomo, in: Proceedings of the 11th on Knowledge Capture Conference, ACM, 2021.


When is the Peak Performance Reached? An Analysis of RDF Triple Stores

H. Khan, A. Manzoor, A.-C. Ngonga Ngomo, M. Saleem, in: Studies on the Semantic Web, IOS Press, 2021.


Unsupervised Relation Extraction Using Sentence Encoding

A. Manzoor, M. Saleem, A.-C. Ngonga Ngomo, in: The Semantic Web: ESWC 2021 Satellite Events, Springer International Publishing, Cham, 2021.


Parameterized complexity of abduction in Schaefer’s framework

Y. Mahmood, A. Meier, J. Schmidt, Journal of Logic and Computation 31 (2021) 266–296.


Knowledge Graphs for Multilingual Language Translation and Generation

D.C. Moussalem, Knowledge Graphs for Multilingual Language Translation and Generation, 2020.


CauseNet: Towards a Causality Graph Extracted from the Web

S. Heindorf, Y. Scholten, H. Wachsmuth, A.-C. Ngonga Ngomo, M. Potthast, in: Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020), 2020, pp. 3023–3030.


Benchmarking the Lifecycle of Knowledge Graphs

M. Röder, M. Sherif, M. Saleem, F. Conrads, A.-C. Ngonga Ngomo, in: I. Tiddi, F. Lécué, P. Hitzler (Eds.), Knowledge Graphs for EXplainable Artificial Intelligence: Foundations, Applications and Challenges, IOS Press, 2020, pp. 73–97.


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