Search Results for author: Christina Göpfert

Found 7 papers, 3 papers with code

Discovering Personalized Semantics for Soft Attributes in Recommender Systems using Concept Activation Vectors

2 code implementations6 Feb 2022 Christina Göpfert, Alex Haig, Yinlam Chow, Chih-Wei Hsu, Ivan Vendrov, Tyler Lu, Deepak Ramachandran, Hubert Pham, Mohammad Ghavamzadeh, Craig Boutilier

Interactive recommender systems have emerged as a promising paradigm to overcome the limitations of the primitive user feedback used by traditional recommender systems (e. g., clicks, item consumption, ratings).

Recommendation Systems

Supervised Learning in the Presence of Concept Drift: A modelling framework

no code implementations21 May 2020 Michiel Straat, Fthi Abadi, Zhuoyun Kan, Christina Göpfert, Barbara Hammer, Michael Biehl

We present a modelling framework for the investigation of supervised learning in non-stationary environments.

Quantization

Adversarial Robustness Curves

no code implementations31 Jul 2019 Christina Göpfert, Jan Philip Göpfert, Barbara Hammer

The existence of adversarial examples has led to considerable uncertainty regarding the trust one can justifiably put in predictions produced by automated systems.

Adversarial Robustness

When can unlabeled data improve the learning rate?

no code implementations28 May 2019 Christina Göpfert, Shai Ben-David, Olivier Bousquet, Sylvain Gelly, Ilya Tolstikhin, Ruth Urner

In semi-supervised classification, one is given access both to labeled and unlabeled data.

FRI -- Feature Relevance Intervals for Interpretable and Interactive Data Exploration

no code implementations2 Mar 2019 Lukas Pfannschmidt, Christina Göpfert, Ursula Neumann, Dominik Heider, Barbara Hammer

Most existing feature selection methods are insufficient for analytic purposes as soon as high dimensional data or redundant sensor signals are dealt with since features can be selected due to spurious effects or correlations rather than causal effects.

feature selection General Classification +1

Time Series Prediction for Graphs in Kernel and Dissimilarity Spaces

1 code implementation21 Apr 2017 Benjamin Paaßen, Christina Göpfert, Barbara Hammer

We propose to phrase time series prediction as a regression problem and apply dissimilarity- or kernel-based regression techniques, such as 1-nearest neighbor, kernel regression and Gaussian process regression, which can be applied to graphs via graph kernels.

Distributed Computing Gaussian Processes +3

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