Olga Ovcharenko

ORCID: 0009-0003-3676-482X
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About
Contact & Profiles
Research Areas
  • Stochastic Gradient Optimization Techniques
  • Cryptography and Data Security
  • Privacy-Preserving Technologies in Data
  • Topic Modeling
  • Recommender Systems and Techniques

ETH Zurich
2025

Graz University of Technology
2021-2022

Data science workflows are largely exploratory, dealing with under-specified objectives, open-ended problems, and unknown business value. Therefore, little investment is made in systematic acquisition, integration, pre-processing of data. This lack infrastructure results redundant manual effort computation. Furthermore, central data consolidation not always technically or economically desirable even feasible (e.g., due to privacy, and/or ownership). The ExDRa system aims provide for this...

10.1145/3448016.3457549 article EN Proceedings of the 2022 International Conference on Management of Data 2021-06-09

Federated learning allows training machine (ML) models without central consolidation of the raw data. Variants such federated systems enable privacy-preserving ML, and address data ownership and/or sharing constraints. However, existing work mostly adopt data-parallel parameter-server architectures for mini-batch training, require manual construction runtime plans, largely ignore broad variety preparation, ML algorithms, model debugging. Over last years, we extended Apache SystemDS by an...

10.1145/3511808.3557162 article EN Proceedings of the 31st ACM International Conference on Information & Knowledge Management 2022-10-16
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