16 citations · 20 across the 9 of their papers we have counts for
9 papers
FrED: External Data Influence Estimation via Domain Knowledge Graph Grounding
Theodoros Aivalis, Iraklis A. Klampanos, Antonis Troumpoukis +1
The rapid deployment of generative AI has amplified the critical need for Training Data Attribution to ensure transparency and accountability. However, current parametric approache…
Training Data Attribution for Image Generation using Ontology-Aligned Knowledge Graphs
Theodoros Aivalis, Iraklis A. Klampanos, Antonis Troumpoukis +1
As generative models become powerful, concerns around transparency, accountability, and copyright violations have intensified. Understanding how specific training data contributes…
Bridging Ethical Principles and Algorithmic Methods: An Alternative Approach for Assessing Trustworthiness in AI Systems
Michael Papademas, Xenia Ziouvelou, Antonis Troumpoukis +1
Artificial Intelligence (AI) technology epitomizes the complex challenges posed by human-made artifacts, particularly those widely integrated into society and exerting significant…
Enhancing Interpretability in Generative AI Through Search-Based Data Influence Analysis
Theodoros Aivalis, Iraklis A. Klampanos, Antonis Troumpoukis +1
Generative AI models offer powerful capabilities but often lack transparency, making it difficult to interpret their output. This is critical in cases involving artistic or copyrig…
A geospatial source selector for federated GeoSPARQL querying
Antonis Troumpoukis, Stasinos Konstantopoulos, Nefeli Prokopaki-Kostopoulou
Background: Geospatial linked data brings into the scope of the Semantic Web and its technologies, a wealth of datasets that combine semantically-rich descriptions of resources wit…
A Logical Characterization of the Preferred Models of Logic Programs with Ordered Disjunction
Angelos Charalambidis, Panos Rondogiannis, Antonis Troumpoukis
Logic Programs with Ordered Disjunction (LPODs) extend classical logic programs with the capability of expressing alternatives with decreasing degrees of preference in the heads of…
Lexicographic Logic: a Many-valued Logic for Preference Representation
Angelos Charalambidis, Giorgos Papadimitriou, Panos Rondogiannis +1
Logical formalisms provide a natural and concise means for specifying and reasoning about preferences. In this paper, we propose lexicographic logic, an extension of classical prop…
Predicate Specialization for Definitional Higher-order Logic Programs
Antonis Troumpoukis, Angelos Charalambidis
Higher-order logic programming is an interesting extension of traditional logic programming that allows predicates to appear as arguments and variables to be used where predicates…
An extension of SPARQL for expressing qualitative preferences
Antonis Troumpoukis, Stasinos Konstantopoulos, Angelos Charalambidis
In this paper we present SPREFQL, an extension of the SPARQL language that allows appending a PREFER clause that expresses "soft" preferences over the query results obtained by the…