I was a research assistant and doctoral student at the University of Zurich in the Database Technology Research Group, working on my doctoral thesis under the supervision of Prof. Michael Böhlen.

I received my Bachelor's and Master's degree in Computer Science in 2013 and 2015, respectively, from the Free University of Bolzano. I started my PhD In 2015 and completed it in 2021.

I'm now working as a data engineer at Blockshake.

Robust and Scalable Content-and-Structure Indexing of Semi-Structured Hierarchical Data

• K. Wellenzohn, M. H. Böhlen, S. Helmer
  Dynamic Interleaving of Content and Structure for Robust Indexing of Semi-Structured Hierarchical Data
  [Extended Version on arXiv] [Code on GitHub] [Datasets on Zenodo]
  VLDB 2020, Tokyo, Japan
• K. Wellenzohn, L. Popovic, M. H. Böhlen, S. Helmer
  Inserting Keys into the Robust Content-and-Structure (RCAS) Index
  [Code on GitHub] [Datasets on Zenodo] [Slides]
  ADBIS 2021, Tartu, Estonia
• K. Wellenzohn, M. H. Böhlen, A. Dignös, J. Gamper, H. Mitterer
  Continuous Imputation of Missing Values in Streams of Pattern-Determining Time Series
  [Slides] [Slides (Print)] [Poster]
  EDBT 2017, Venice, Italy

• Spring 2021: Database Systems
• Fall 2020: Distributed Database Systems
• Spring 2020: Database Systems
• Spring 2019: Database Systems
• Fall 2018: Distributed Database Systems
• Spring 2018: Database Systems
• Spring 2017: Database Systems
• Fall 2016: Distributed Database Systems
• Spring 2016: Database Systems