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Author

Georgios Paliouras

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#machine learning Open access May 2026

Focused PU learning from imbalanced data

This work proposes a new method of learning from positive and unlabeled (PU) examples in highly imbalanced datasets under two labeling mechanisms—selecting positives completely at random (SCAR) and selecting at random (SAR).

Elias Zavitsanos, Georgios Paliouras · 0 citations
Jul 2026

Enhancing Small Language Models Reasoning through Knowledge Graph Grounding

This work investigates a neuro-symbolic agentic framework to enhance the reasoning capabilities of SLMs, specifically Gemma 3 (1B, 4B) and Llama 3.2 (3B), using the CLUTRR kinship benchmark.

Dimitrios Kelesis, K. Bougiatiotis, Georgios Paliouras · 0 citations
Preprint Jul 2026

Improving Molecular Property Prediction in Small Language Models Using Graph-based Tools

A modular Context-Augmented Prompting framework that enables agentic tool use at inference time: a trained GNN expert model provides a predictive hint with confidence, and a GNN extracts an instance-specific explanatory subgraph via a necessity-based edge-drop intervention.

K. Bougiatiotis, Dimitrios Kelesis, Georgios Paliouras · 1 citation

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