Search Results for author: Peter Müllner

Found 5 papers, 3 papers with code

The Impact of Differential Privacy on Recommendation Accuracy and Popularity Bias

1 code implementation8 Jan 2024 Peter Müllner, Elisabeth Lex, Markus Schedl, Dominik Kowald

In this work, we study how DP impacts recommendation accuracy and popularity bias, when applied to the training data of state-of-the-art recommendation models.

Collaborative Filtering Recommendation Systems

ReuseKNN: Neighborhood Reuse for Differentially-Private KNN-Based Recommendations

1 code implementation23 Jun 2022 Peter Müllner, Elisabeth Lex, Markus Schedl, Dominik Kowald

User-based KNN recommender systems (UserKNN) utilize the rating data of a target user's k nearest neighbors in the recommendation process.

Recommendation Systems

Position Paper on Simulating Privacy Dynamics in Recommender Systems

no code implementations14 Sep 2021 Peter Müllner, Elisabeth Lex, Dominik Kowald

With this work, we hope to present perspectives on how privacy-aware simulations could be realized, such that they enable researchers to study the dynamics of privacy within a recommender system.

Position Recommendation Systems

Robustness of Meta Matrix Factorization Against Strict Privacy Constraints

1 code implementation18 Jan 2021 Peter Müllner, Dominik Kowald, Elisabeth Lex

In this paper, we explore the reproducibility of MetaMF, a meta matrix factorization framework introduced by Lin et al. MetaMF employs meta learning for federated rating prediction to preserve users' privacy.

Meta-Learning

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