Publications

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2021
Margaris D, Spiliotopoulos D, Karagiorgos G, Vassilakis C, Vasilopoulos D.  2021.  On Addressing the Low Rating Prediction Coverage in Sparse Datasets Using Virtual Ratings. SN Computer Science. 2:255.
Spiliotopoulos D, Giannakopoulos T, Vassilakis C, Wallace M, Lantzouni M, Poulopoulos V, Margaris D.  2021.  An Interface for User-Centred Process and Correlation Between Large Datasets. Proceedings of the 2021 International Conference on Human-Computer Interaction: Design, User Experience, and Usability: UX Research and Design.
Margaris D, Spiliotopoulos D, Vasilopoulos D, Vassilakis C.  2021.  A User Interface for Personalising WS-BPEL Scenarios. Proceedings of the 2021 International Conference on Human-Computer Interaction: HCI in Business, Government and Organizations.
2026
Koryzis D, Spiliotopoulos D, Margaris D, Vassilakis C, Fitsilis F.  2026.  The Evolution of the Digital Parliament: Enabling Technologies, Research Gaps, and Future Directions. Information. 17:633.
Roumeliotis KI, Margaris D, Spiliotopoulos D, Vassilakis C.  2026.  Large Language Models as Explainable AI Ensemble Aggregators for Business Review Sentiment Analysis: A Comparative Study with Classical Ensembles. Applied Sciences. 16:6479.
Roumeliotis KI, Margaris D, Spiliotopoulos D, Vassilakis C.  2026.  A Large-Scale Empirical Study of LLM Orchestration and Ensemble Strategies for Sentiment Analysis in Recommender Systems. Future Internet. 18:112.
Singh M, Roumeliotis KI, Vassilakis C, Margaris D, Mpardis G, Spiliotopoulos D.  2026.  A Multimodal Pipeline for Personalized Recommendations from Greek YouTube Content: Integrating Automatic Speech Recognition and Aspect-Based Sentiment Analysis. Proceedings of the 2026 International Conference on Information, Intelligence, Systems and Applications.
Lapadaki S-A, Nanos J, Margaris D, Vassilakis C, Spiliotopoulos D.  2026.  Optimizing Collaborative Filtering for Accurate Rating Predictions in Very Sparse Datasets. Future Internet. 18:114.
Nanos J, Margaris D, Mpardis G, Roumeliotis KI, Vassilakis C, Spiliotopoulos D.  2026.  Unveiling Structural Distributional Bias in Collaborative Filtering for Ultra-Sparse Datasets. Proceedings of the 2026 International Conference on Information, Intelligence, Systems and Applications.