Lazaros Toumanidis

Software engineer and researcher working on human–AI collaboration, ML systems, and AI-native computing.

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About

Electronics Engineering BSc from Piraeus University of Applied Sciences (2014, Anastasiadis Award — highest grade of the year) and MSc by research from the University of West Attica (2020). Research associate at the CoNSeRT laboratory since 2016, with participation in multiple European and national projects and 26 publications in international journals and conferences.

Current work centres on human-in-the-loop ML systems, AI-native software, and the design of interfaces where human judgment and AI capability are deliberately composed — not accidentally combined.

Projects

Human in the Loop: Misunderstood A research project on human–AI collaboration across four seasonal editions — textbook, workbook, pamphlet, interactive reader, and a deployable platform. what-if.io Limen OS A voice-first, AI-native desktop shell demonstrating HITL principles as a designed interface. Built on Tauri, Babylon.js, and multi-model AI routing. limen-os.io

Publications

Full list on Google Scholar → BibTeX ↓
  1. P. Kasnesis, L. Toumanidis, D. Pagliari, and A. Burrello, "Replacing attention with modality-wise convolution for energy-efficient PPG-based heart rate estimation using knowledge distillation," IEEE Journal of Biomedical and Health Informatics, 2025. 10.1109/JBHI.2025.3580474
  2. P. Kasnesis, T. Plavoukou, A. C. Syropoulou, L. Toumanidis, and G. Georgoudis, "A knee rehabilitation exercises dataset for postural assessment using wearable devices," Scientific Data, 2025. 10.1038/s41597-025-04963-4
  3. A. Antikatzidis, M. Feidakis, K. Marathaki, and L. Toumanidis, "Enrich humanoids with large language models (LLM)," IEEE EDUCON, 2024. 10.1109/EDUCON60312.2024.10578585
  4. P. Kasnesis, L. Toumanidis, A. Burrello, C. Chatzigeorgiou, and C. Z. Patrikakis, "Feature-level cross-attentional PPG and motion signal fusion for heart rate estimation," IEEE COMPSAC, 2023. 10.1109/compsac57700.2023.00267
  5. J. Choi, L. Toumanidis, C. M. Yeum, et al., "Automated graffiti detection: A novel approach to maintaining historical architecture in communities," Applied Sciences, vol. 12, no. 6, 2022. 10.3390/app12062983
  6. P. Monachelis, P. Kasnesis, L. Toumanidis, C. Z. Patrikakis, and P. Papadopoulos, "Evaluation and visualization of trustworthiness in social media – EUNOMIA's approach," IEEE COMPSAC, 2022. 10.1109/compsac54236.2022.00038
  7. P. Monachelis, L. Toumanidis, P. Kasnesis, and C. Patrikakis, "Combating fake news in social networks through the active participation of users: the EUNOMIA approach," International Journal of Electronic Governance, vol. 14, 2022. 10.1504/ijeg.2022.123246
  8. P. Kasnesis, L. Toumanidis, and C. Z. Patrikakis, "Combating fake news with transformers: A comparative analysis of stance detection and subjectivity analysis," Information, vol. 12, no. 10, 2021. 10.3390/info12100409
  9. L. Toumanidis, P. Kasnesis, C. Chatzigeorgiou, M. Feidakis, and C. Patrikakis, "ActiveCrowds: A human-in-the-loop machine learning framework," Frontiers in Artificial Intelligence and Applications, vol. 338, pp. 176–184, 2021. 10.3233/faia210090
  10. P. Kasnesis, R. Heartfield, X. Liang, L. Toumanidis, G. Sakellari, C. Patrikakis, and G. Loukas, "Transformer-based identification of stochastic information cascades in social networks using text and image similarity," Applied Soft Computing, vol. 108, 2021. 10.1016/j.asoc.2021.107413
  11. P. Kasnesis, R. Heartfield, L. Toumanidis, X. Liang, G. Loukas, and C. Patrikakis, "A prototype deep learning paraphrase identification service for discovering information cascades in social networks," IEEE ICMEW, 2020. 10.1109/ICMEW46912.2020.9106044
  12. L. Toumanidis, R. Heartfield, P. Kasnesis, G. Loukas, and C. Patrikakis, "A prototype framework for assessing information provenance in decentralised social media: The EUNOMIA concept," in E-Democracy – Safeguarding Democracy and Human Rights in the Digital Age, Springer, 2020. 10.1007/978-3-030-37545-4_13
  13. C. Chatzigeorgiou, P. Kasnesis, and L. G. Toumanidis, "Exploiting edge computing for privacy aware tourism demand forecasting," IT Professional, vol. 21, no. 3, 2019. 10.1109/MITP.2019.2901876
  14. P. Kasnesis, C. Chatzigeorgiou, L. Toumanidis, and C. Z. Patrikakis, "Gesture-based incident reporting through smart watches," IEEE PerCom Workshops, 2019. 10.1109/PERCOMW.2019.8730586
  15. P. Kasnesis, D. G. Kogias, L. Toumanidis, M. G. Xevgenis, C. Z. Patrikakis, G. Giunta, and G. L. Calsi, "An IoE architecture for the preservation of cultural heritage: The STORM use case," in Harnessing the Internet of Everything (IoE), IGI Global, 2019. 10.4018/978-1-5225-7332-6.ch009
  16. L. Toumanidis, E. Bocaj, P. Kasnesis, and C. Z. Patrikakis, "Supporting cultural heritage preservation through game-based crowdsourcing," in Strategic Innovative Marketing and Tourism, Springer, 2019. 10.1007/978-3-030-12453-3_114
  17. L. Toumanidis, P. Karapetros, C. Giannousis, D. G. Kogias, M. Feidakis, and C. Z. Patrikakis, "Developing the museum-monumental experience from linear to interactive using chatbots," in Strategic Innovative Marketing and Tourism, Springer, 2019. 10.1007/978-3-030-12453-3_133
  18. C. Chatzigeorgiou, L. Toumanidis, D. Kogias, C. Patrikakis, and E. Jacksch, "A communication gateway architecture for ensuring privacy and confidentiality in incident reporting," IEEE SERA, 2017. 10.1109/SERA.2017.7965759
  19. P. Kasnesis, C. Z. Patrikakis, D. Kogias, L. Toumanidis, and I. S. Venieris, "Cognitive friendship and goal management for the social IoT," Computers & Electrical Engineering, vol. 58, 2017. 10.1016/j.compeleceng.2016.09.024
  20. E. Katsadouros, D. Kogias, L. Toumanidis, C. Chatzigeorgiou, and C. Z. Patrikakis, "Teaching network security through a scavenger hunt game," IEEE EDUCON, 2017. 10.1109/EDUCON.2017.7943094
  21. P. Kasnesis, L. Toumanidis, D. Kogias, C. Z. Patrikakis, and I. S. Venieris, "ASSIST: An agent-based SIoT simulator," IEEE WF-IoT, 2016. 10.1109/wf-iot.2016.7845409
  22. M. G. Xevgenis, L. Toumanidis, D. G. Kogias, and C. Z. Patrikakis, "The Virtual Lab (VLAB) cloud solution," IEEE Globecom Workshops, 2016. 10.1109/GLOCOMW.2016.7849065
  23. C. Z. Patrikakis, S. A. Kalantzis, L. Toumanidis, and F. Zisimos, "Supporting lab courses using OpenStack," in E-Democracy 2013, Communications in Computer and Information Science, vol. 441, Springer, 2014. 10.1007/978-3-319-11710-2_9

Connect

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