Publications

C. Tzagkarakis , R. Dekker (2026). When Does Conformalization Help? A Cross-Paradigm Analysis of Probabilistic Electricity Price Forecasting. In Proceedings of the 14th EETN Conference on Artificial Intelligence (SETN ‘26) (to appear).

C. Tzagkarakis , K. Boerjan , E. Karakoyun , R. Dekker , G. Tzagkarakis (2025). A Comparative Evaluation of Probabilistic Electricity Price Forecasting Across Market Regimes. In 10th International Symposium and 32nd National Conference on Operational Research (HELORS ‘25), Chania, Greece.

C. Tzagkarakis , T. Palpanas , G. Tzagkarakis (2025). Efficient Pattern-Based Analysis of Network Flows in IoT Systems. In Digital Technologies for Future Cities Special Session, Proc. of International Balkan Conference on Communications and Networking (BalkanCom ‘25), Piraeus, Greece.

S. Silvestri , S. Islam , S. Papastergiou , C. Tzagkarakis , M. Ciampi (2023). A Machine Learning Approach for the NLP-Based Analysis of Cyber Threats and Vulnerabilities of the Healthcare Ecosystem. Sensors, 23(2), Special Issue on Intelligent Systems for Clinical Care and Remote Patient Monitoring (MDPI).

C. Tzagkarakis , P. Charalampidis , S. Roubakis , A. Fragkiadakis , S. Ioannidis (2022). Evaluating Short-Term Forecasting of Multiple Time Series in IoT Environments. In Edge-Fog-Cloud Machine Learning for Smart Cities Applications Special Session, Proc. of European Signal Processing Conference (EUSIPCO ‘22), Belgrade, Serbia.

V. Danilatou , S. Nikolakakis , D. Antonakaki , C. Tzagkarakis , D. Mavroidis , T. Kostoulas , S. Ioannidis (2022). Outcome Prediction in Critically-Ill Patients with Venous Thromboembolism and/or Cancer Using Machine Learning Algorithms: External Validation and Comparison with Scoring Systems. International Journal of Molecular Sciences, 23(13), Special Issue on Artificial Intelligence in Biomarker Discovery (MDPI).

A. Shevtsov , C. Tzagkarakis , D. Antonakaki , S. Ioannidis (2022). Explainable Machine Learning Pipeline for Twitter Bot Detection During the 2020 US Presidential Elections. Software Impacts, 13(100333) (Elsevier).

A. Shevtsov , C. Tzagkarakis , D. Antonakaki , S. Ioannidis (2022). Identification of Twitter Bots Based on an Explainable Machine Learning Framework: The US 2020 Elections Case Study. In Proc. of International AAAI Conference on Web and Social Media (ICWSM).

V. Danilatou , D. Antonakaki , C. Tzagkarakis , A. Kanterakis , V. Katos , T. Kostoulas (2020). Automated Mortality Prediction in Critically-Ill Patients with Thrombosis using Machine Learning. In 2020 IEEE 20th International Conference on Bioinformatics and Bioengineering (BIBE), Cincinnati, OH.

C. Tzagkarakis , N. Stefanakis , G. Tzagkarakis (2019). Impact Sounds Classification for Interactive Applications via Discriminative Dictionary Learning. In European Signal Processing Conference (EUSIPCO ‘19), A Coruña, Spain.

C. Tzagkarakis , N. Petroulakis , S. Ioannidis (2019). Botnet Attack Detection at the IoT Edge Based on Sparse Representation. In Global Internet of Things Summit (GIoTS ‘19), Aarhus, Denmark.

G. Hatzivasilis , N. Christodoulakis , C. Tzagkarakis , S. Ioannidis , K. Fysarakis , G. Demetriou , M. Panayiotou (2019). The CE-IoT Framework for Green ICT Organizations. In 1st International Workshop on Smart Circular Economy (SmaCE ‘19), Greece.

C. Tzagkarakis , W. B. Kleijn , J. Skoglund (2017). Joint Wideband Source Localization and Acquisition Based on a Grid-Shift Approach. In Proc. of Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA ‘17), New Paltz, NY.

C. Tzagkarakis , S. Becker , A. Mouchtaris (2014). Joint Low-Rank Representation and Matrix Completion Under a Singular Value Thresholding Framework. In Proc. of European Signal Processing Conference (EUSIPCO ‘14), Lisbon, Portugal.

C. Tzagkarakis , A. Mouchtaris (2014). Reconstruction of Missing Features Based on a Low-Rank Assumption for Robust Speaker Identification. In Proc. of International Conference on Information, Intelligence, Systems and Applications (IISA 2014), Chania, Greece (Invited paper).

C. Tzagkarakis , A. Mouchtaris (2013). Sparsity Based Robust Speaker Identification Using a Discriminative Dictionary Learning Approach. In Proc. of European Signal Processing Conference (EUSIPCO ‘13), Marrakech, Morocco.

C. Tzagkarakis , A. Mouchtaris (2013). Robust Speaker Identification Using Matrix Completion Under a Missing Data Imputation Framework. In Proc. Workshop on Signal Processing with Adaptive Sparse Structured Representations (SPARS ‘13), Lausanne, Switzerland.

A. Griffin , T. Hirvonen , C. Tzagkarakis , A. Mouchtaris , P. Tsakalides (2011). Single-Channel and Multi-Channel Sinusoidal Audio Coding Using Compressed Sensing. IEEE Transactions on Audio, Speech, and Language Processing, 19(5), 1382–1395.

C. Tzagkarakis , A. Mouchtaris (2010). Robust Text-Independent Speaker Identification Using Short Test and Training Sessions. In Proc. of European Signal Processing Conference (EUSIPCO ‘10), Aalborg, Denmark.

C. Tzagkarakis , A. Mouchtaris , P. Tsakalides (2009). A Multichannel Sinusoidal Model Applied to Spot Microphone Signals for Immersive Audio. IEEE Transactions on Audio, Speech, and Language Processing, 17(8), 1483–1497.

A. Griffin , C. Tzagkarakis , T. Hirvonen , A. Mouchtaris , P. Tsakalides (2009). Exploiting the Sparsity of the Sinusoidal Model Using Compressed Sensing for Audio Coding. In Proc. Workshop on Signal Processing with Adaptive Sparse Structured Representations (SPARS ‘09), Saint-Malo, France.

C. Tzagkarakis , A. Mouchtaris , P. Tsakalides (2008). Modeling and Coding of Spot Microphone Signals for Immersive Audio Based on the Sinusoidal Model. In Proc. of European Signal Processing Conference (EUSIPCO ‘08), Lausanne, Switzerland.

A. Mouchtaris , C. Tzagkarakis , P. Tsakalides (2008). Low Bitrate Coding of Spot Audio Signals for Interactive and Immersive Audio Applications. In New Directions in Intelligent Interactive Multimedia (Springer).

C. Tzagkarakis , A. Mouchtaris , P. Tsakalides (2007). Modeling Spot Microphone Signals Using the Sinusoidal Plus Noise Approach. In Proc. of Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA ‘07), New Paltz, NY.

C. Tzagkarakis , A. Mouchtaris , P. Tsakalides (2007). Sinusoidal Modeling of Spot Microphone Signals Based on Noise Transplantation for Multichannel Audio Coding. In Proc. of European Signal Processing Conference (EUSIPCO ‘07), Poznan, Poland.

C. Tzagkarakis , A. Mouchtaris , P. Tsakalides (2006). Musical Genre Classification via Generalized Gaussian and Alpha-Stable Modeling. In Proc. of International Conference on Acoustics, Speech, and Signal Processing (ICASSP ‘06), Toulouse, France.