1 code implementation • 8 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.
no code implementations • 21 Oct 2022 • Peter Müllner, Stefan Schmerda, Dieter Theiler, Stefanie Lindstaedt, Dominik Kowald
We find that collaboration-based recommendations provide the most accurate recommendations in all scenarios.
1 code implementation • 23 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.
no code implementations • 14 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.
1 code implementation • 18 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.