no code implementations • 5 Feb 2024 • Meng Cao, Hussain Hussain, Sandipan Sikdar, Denis Helic, Markus Strohmaier, Roman Kern
We further study how interventions on network properties influence fairness by examining counterfactual scenarios with alternative evolution outcomes and differing network properties.
1 code implementation • 13 Sep 2022 • Hussain Hussain, Meng Cao, Sandipan Sikdar, Denis Helic, Elisabeth Lex, Markus Strohmaier, Roman Kern
We hope our findings raise awareness about this issue in our community and lay a foundation for the future development of GNN models that are more robust to such attacks.
1 code implementation • 23 Jul 2021 • Hussain Hussain, Tomislav Duricic, Elisabeth Lex, Denis Helic, Markus Strohmaier, Roman Kern
In this work, we study adversarial attacks that are uninformed, where an attacker only has access to the graph structure, but no information about node attributes.
no code implementations • 21 May 2021 • Matthias Wölbitsch, Thomas Hasler, Patrick Kasper, Denis Helic, Simon Walk
Additionally, we conduct a pilot to investigate the challenges related to the integration of such a localization system in the day-to-day business of retail stores.
no code implementations • 2 Apr 2021 • Tiago Santos, Florian Lemmerich, Denis Helic
With a series of experiments with synthetic and real-world data from domains such as "classical" earthquake modeling or the manifestation of collective emotions on Twitter, we demonstrate that our proposed approach helps to quantify uncertainty and thereby to understand and fit Hawkes processes in practice.
1 code implementation • 19 Feb 2021 • Thorsten Ruprechter, Manoel Horta Ribeiro, Tiago Santos, Florian Lemmerich, Markus Strohmaier, Robert West, Denis Helic
Wikipedia, the largest encyclopedia ever created, is a global initiative driven by volunteer contributions.
Computers and Society
2 code implementations • 21 Jan 2021 • Christian Toth, Denis Helic, Bernhard C. Geiger
We thoroughly validate the effectiveness of our approach on synthetic and empirical networks, respectively, and compare Synwalk's performance with the performance of Infomap and Walktrap.
1 code implementation • 30 Oct 2020 • Hussain Hussain, Tomislav Duricic, Elisabeth Lex, Roman Kern, Denis Helic
In this work, we systematically study the impact of community structure on the performance of GNNs in semi-supervised node classification on graphs.
no code implementations • 30 Mar 2020 • Tomislav Duricic, Hussain Hussain, Emanuel Lacic, Dominik Kowald, Denis Helic, Elisabeth Lex
In this work, we study the utility of graph embeddings to generate latent user representations for trust-based collaborative filtering.
no code implementations • 28 Oct 2016 • Simon Walk, Lisette Espín-Noboa, Denis Helic, Markus Strohmaier, Mark Musen
In particular, we were able to identify seven distinct browsing-behavior types, which all make use of different functionality provided by BioPortal.