My research combines methods for text retrieval, extraction, machine learning and analytics (TREMA).
Currently, I am working on methods that automatically, and in a query-driven manner, retrieve materials from the Web and compose Wikipedia-like articles. Especially for information needs, where the user has very little prior knowledge about, the web search paradigm of 10 blue hyperlinks is not sufficient. Instead, I envision to provide a synthesis of the Web materials to give a comprehensive overview (TREC CAR).
My goal is to develop algorithm to find what users are looking for based on text content only. In contrast, most Web-search algorithms are based on interaction data such as query-log, click, or session information---information that is not available when searching private document collections. Consequently, we aim to maximize the utility of information retrieval models in combination with methods from natural language processing.
A particular emphasis of my work is to utilize information from structured knowledge bases such as Wikipedia, Freebase, or DBpedia together with text-based reasoning on general document and Web corpora (KG4IR). In my work on "Entity Query Feature Expansion" (SIGIR 2014), I demonstrate that significantly better search results are obtained when using entity linking and knowledge bases in the retrieval algorithm.
Ph.D., Computer Science, Max Planck Institute
M.S., Goethe University, Germany
B.S., Goethe University, Germany
SCIENCE & TECHNOLOGY/MATHEMATICS/COMPUTER SCIENCE
CS 753/853: Information Retrieval
CS 758/858: Algorithms
CS 780/880: Top/Machine Learn for Sequnces
CS 953: DS - Knowledge Graphs and Text
CS 980: Adv Top/Data Sci w/ KnowGraphs
CS 999: Doctoral Research
Dietz, L., Xiong, C., Dalton, J., & Meij, E. (Eds.) (2019). Special issue on knowledge graphs and semantics in text analysis and retrieval \textbf[Special Issue]. In . Springer Netherlands.
Nanni, F., Ponzetto, S. P., Dietz, L., & Machinery, A. C. (2018). Entity-Aspect Linking: Providing Fine-Grained Semantics of Entities in Context. In JCDL'18: PROCEEDINGS OF THE 18TH ACM/IEEE JOINT CONFERENCE ON DIGITAL LIBRARIES (pp. 49-58). doi:10.1145/3197026.3197047
Dalton, J., Dietz, L., & Allan, J. (2014). Entity query feature expansion using knowledge base links. In Proceedings of the 37th international ACM SIGIR conference on Research & development in information retrieval (pp. 365-374). ACM.