Speaking Hours

Monday, 14:00 - 16:00

Always write an e-mail to make an appointment before coming to the office. Otherwise, it is possible that I either won't have time for you or that I am not in the office (even throughout the speaking hours).

Thesis Supervision

I supervised/supported several bachelor and master theses (sorted by the year of submission).

2018

• FactCheck – An automatic approach to validate facts in a knowledge base
• Extraction of Linked Data from HTML webpages

2019

• Grammar-based Compression of RDF Graphs

2020

• Benchmarking of Dataset Linkage Recommendation Systems based on real-world Linked Data Application Scenarios
• A Recommender System for Basket Items
• Generation of Explainable Recommendations for Song Playlists
• Recommendation System using Embedding Models for Knowledge Graphs

2021

• Benchmarking of Dataset Linkage Recommendation Systems based on real-world Linked Data Application Scenarios
• A Recommender System for Basket Items
• Generation of Explainable Recommendations for Song Playlists
• Recommendation System using Embedding Models for Knowledge Graphs

2022

• Evaluation of Search Algorithms in Word and Knowledge Graph Embedding Models
• Knowledge Graph Embedding Model Ensemble
• Sedenion-valued Embeddings in Knowledge Graph Fact Validation

2023

• Algorithm Selection Applied to Fact Validation Ensemble Learning

2024

• Simulate RDF Graphs: A Simplex Approach
• Approximate Nearest Neighbour Search in Knowledge Graph Embedding Spaces

Research Interest

I am mainly interested in:

• Benchmarking Big Linked Data Systems and automatically analyze the results
• Analyzing Linked Data—especially with respect to its veracity
• Crawling the Data Web

Reviewing

My little free time seems to be partly consumed by reviewing, e.g.,

• International Conference on Weblogs and Social Media (ICWSM) in 2013
• Journal of Biomedical Semantics on Bio-Medical Information Retrieval (JBMS Bio-IR) in 2015
• CIKM 2015 Workshop on Topic Models: Post-Processing and Applications
• Journal of Web Semantics (JWS) in 2018, 2019
• PLOS ONE in 2018
• Semantic Web Journal (1394, 1604, 1809, 2446, 2529, 3296, 3467)
• European Conference on Information Systems (ECIS 2020)
• International Semantic Web Conference (ISWC 2020)
• QuWeDa 2023
• GeoLD 2024