activity
20182025
most citedA Deep Ensemble Framework for Fake News Detection and Classification

71 citations · 131 across the 16 of their papers we have counts for

collaborators

17 papers

cs.LG2025

TABFAIRGDT: A Fast Fair Tabular Data Generator using Autoregressive Decision Trees

Emmanouil Panagiotou, Benoît Ronval, Arjun Roy +4

Ensuring fairness in machine learning remains a significant challenge, as models often inherit biases from their training data. Generative models have recently emerged as a promisi…

cs.LG2025

MMM-fair: An Interactive Toolkit for Exploring and Operationalizing Multi-Fairness Trade-offs

Swati Swati, Arjun Roy, Emmanouil Panagiotou +1

Fairness-aware classification requires balancing performance and fairness, often intensified by intersectional biases. Conflicting fairness definitions further complicate the task,…

cs.LG2025

Achieving Hilbert-Schmidt Independence Under Rényi Differential Privacy for Fair and Private Data Generation

Tobias Hyrup, Emmanouil Panagiotou, Arjun Roy +3

As privacy regulations such as the GDPR and HIPAA and responsibility frameworks for artificial intelligence such as the AI Act gain traction, the ethical and responsible use of rea…

cs.LG2025

Revealing Hidden Vulnerabilities in Autoencoders through Gradient Signal Restoration

Chethan Krishnamurthy Ramanaik, Arjun Roy, Tobias Callies +1

Adversarial robustness of deep autoencoders (AEs) has received less attention than that of discriminative models, although their compressed latent representations induce ill-condit…

cs.CY2025

Achieving Socio-Economic Parity through the Lens of EU AI Act

Arjun Roy, Stavroula Rizou, Symeon Papadopoulos +1

Unfair treatment and discrimination are critical ethical concerns in AI systems, particularly as their adoption expands across diverse domains. Addressing these challenges, the rec…

cs.LG2024

Synthetic Tabular Data Generation for Class Imbalance and Fairness: A Comparative Study

Emmanouil Panagiotou, Arjun Roy, Eirini Ntoutsi

Due to their data-driven nature, Machine Learning (ML) models are susceptible to bias inherited from data, especially in classification problems where class and group imbalances ar…

cs.LG2024

Adversarial Robustness of VAEs across Intersectional Subgroups

Chethan Krishnamurthy Ramanaik, Arjun Roy, Eirini Ntoutsi

Despite advancements in Autoencoders (AEs) for tasks like dimensionality reduction, representation learning and data generation, they remain vulnerable to adversarial attacks. Vari…

cs.CY2024

Exploring Fusion Techniques in Multimodal AI-Based Recruitment: Insights from FairCVdb

Swati Swati, Arjun Roy, Eirini Ntoutsi

Despite the large body of work on fairness-aware learning for individual modalities like tabular data, images, and text, less work has been done on multimodal data, which fuses var…

cs.LG2023

FairBranch: Mitigating Bias Transfer in Fair Multi-task Learning

Arjun Roy, Christos Koutlis, Symeon Papadopoulos +1

The generalisation capacity of Multi-Task Learning (MTL) suffers when unrelated tasks negatively impact each other by updating shared parameters with conflicting gradients. This is…

cs.LG2023★ 4 cited

Multi-dimensional discrimination in Law and Machine Learning -- A comparative overview

Arjun Roy, Jan Horstmann, Eirini Ntoutsi

AI-driven decision-making can lead to discrimination against certain individuals or social groups based on protected characteristics/attributes such as race, gender, or age. The do…

cs.LG2022

Learning to Teach Fairness-aware Deep Multi-task Learning

Arjun Roy, Eirini Ntoutsi

Fairness-aware learning mainly focuses on single task learning (STL). The fairness implications of multi-task learning (MTL) have only recently been considered and a seminal approa…

cs.LG2022

Parity-based Cumulative Fairness-aware Boosting

Vasileios Iosifidis, Arjun Roy, Eirini Ntoutsi

Data-driven AI systems can lead to discrimination on the basis of protected attributes like gender or race. One reason for this behavior is the encoded societal biases in the train…

cs.LG2021★ 40 cited

A survey on datasets for fairness-aware machine learning

Tai Le Quy, Arjun Roy, Vasileios Iosifidis +2

As decision-making increasingly relies on Machine Learning (ML) and (big) data, the issue of fairness in data-driven Artificial Intelligence (AI) systems is receiving increasing at…

cs.LG2021★ 3 cited

Fair-Capacitated Clustering

Tai Le Quy, Arjun Roy, Gunnar Friege +1

Traditionally, clustering algorithms focus on partitioning the data into groups of similar instances. The similarity objective, however, is not sufficient in applications where a f…

cs.LG2021

Multi-fairness under class-imbalance

Arjun Roy, Vasileios Iosifidis, Eirini Ntoutsi

Recent studies showed that datasets used in fairness-aware machine learning for multiple protected attributes (referred to as multi-discrimination hereafter) are often imbalanced.…

cs.CL2020★ 13 cited

Exploiting stance hierarchies for cost-sensitive stance detection of Web documents

Arjun Roy, Pavlos Fafalios, Asif Ekbal +2

Fact checking is an essential challenge when combating fake news. Identifying documents that agree or disagree with a particular statement (claim) is a core task in this process. I…

cs.CL2018★ 71 cited

A Deep Ensemble Framework for Fake News Detection and Classification

Arjun Roy, Kingshuk Basak, Asif Ekbal +1

Fake news, rumor, incorrect information, and misinformation detection are nowadays crucial issues as these might have serious consequences for our social fabrics. The rate of such…