Wildfire Event Detection using Social Media and Earth Observation Data

E. Valla, A. Moumtzidou, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "Wildfire Event Detection using Social Media and Earth Observation Data.", in Proceedings of the Eleventh International Conference on Remote Sensing and Geoinformation of Environment, RSCy2025 (RSCy2025), Paphos, 17-19 March 2025, (Poster).
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Online Child Grooming Detection: Challenges and Future Directions

N. Mylonas, N. Stylianou, D. Chatzakou, T. Spathi, S. Alevizos, A. Drandaki, A. Koufakis, G. Kalpakis, T. Tsikrika, S. Vrochidis, "Online Child Grooming Detection: Challenges and Future Directions.", in Paradigms on Technology Development for Security Practitioners, I. Gkotsis, D. Kavallieros, N. Stoianov, S. Vrochidis, D. Diagourtas, B. Akhgar, (eds), Security Informatics and Law Enforcement, Springer, Cham, pp 237–247. https://doi.org/10.1007/978-3-031-62083-6_19
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Innovative digital forensic and investigation tools for Law Enforcement: The EMPOWER & TRACY Approach

N. Avgerinos, P. Mertis, M. Tsagaris, N. Desipris, G. Lyberopoulos, E. Theodoropoulou, K. Filis, J. Sarajlić, M. Pastor, D. Chatzakou, G. Kalpakis, C. Chatzikonstantinou, D. Tsatsou, S. Demertzis, P. Leskovsky, C. Mendes, S. Linehan, J. Mulcahy, I. Karvelas, M. Álvarez Fernández, A. Alegria, "Innovative Digital Forensic and Investigation Tools for Law Enforcement: The EMPOWER & TRACY Approach.", in Proceedings of the 20th International Conference on Artificial Intelligence Applications and Innovations (AIAI 2024), Corfu, Greece, 27-30 June 2024.
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ITI-CERTH participation in ActEV and AVS Tracks of TRECVID 2024

K. Gkountakos, D. Galanopoulos, A. Leventakis, G. Tsionkis, K. Stavrothanasopoulos, K. Ioannidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation in ActEV and AVS Tracks of TRECVID 2024.", in Proceedings of the TRECVID 2024 Workshop, Gaithersburg, MD, USA, November 2024.
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From Research to Applications: What Can We Extract with Social Media Sensing?

A. Bozas, S. Andreadis, D. Chatzakou, S. Symeonidis, O. Theodosiadou, P. Kyriakidis, A. Kokkalas, E. A. Stathopoulos, S. Diplaris, T. Tsikrika, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, “What Can We Extract with Social Media Sensing? - Insights from Research to Applications.” SN COMPUT. SCI., vol. 5, 2024. https://doi.org/10.1007/s42979-024-02712-9
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Modified SkipGram Negative Sampling Model for Faster Convergence of Graph Embedding

K. Loumponias, A. Kosmatopoulos, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "Modified SkipGram Negative Sampling Model for Faster Convergence of Graph Embedding.", in Deep Learning Theory and Applications (DeLTA 2022), vol. 1858, Communications in Computer and Information Science, F. A. Sansone, C. Gusikhin, O. Madani, Eds., Cham, Switzerland: Springer, 2023, pp. 1-16.
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Artificial Intelligence to counter Cyber-Terrorism

S. Bianchi, M. Mancuso, C. Paternoster, G. Kalpakis, T. Tsikrika, S. Vrochidis, D. Kozhuharova, B. Jaeger, "Artificial Intelligence to counter Cyber-Terrorism.",in Proceedings of the International Conference on Cybersecurity and Cybercrime, vol. 10, 5-7 December 2023.
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Tweaking EfficientDet for frugal training

G. Orfanidis, K. Ioannidis, S. Vrochidis, I. Kompatsiaris, "Tweaking EfficientDet for frugal training.", in Proceedings of the International Conference on Multimedia Retrieval 2023 (ICMR 2023), Thessaloniki, Greece, 12 - 15 June 2023.
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A Faster Converging Negative Sampling for the Graph Embedding Process in Community Detection and Link Prediction Tasks

K. Loumponias, A. Kosmatopoulos, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "A Faster Converging Negative Sampling for the Graph Embedding Process in Community Detection and Link Prediction Tasks.", in Proceedings of the 3rd International Conference on Deep Learning Theory and Applications - DeLTA, SciTePress, Lisbon, Portugal, 2022, pp. 86-93. DOI: 10.5220/0011142000003277
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An Explainable Intervention Prediction for Trauma Patients

Z. Vasileiou, G. Meditskos, S. Vrochidis, N. Bassiliades, "An Explainable Intervention Prediction for Trauma Patients.", in Proceedings of the Semantic Web Applications and Tools for Health Care and Life Sciences (SWAT4HCLS), Basel Switzerland, 13-16 February 2023 (Poster).
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Leveraging Cyber ranges for Prototyping, Certification and Training: The ECHO case

N. Mengidis, M. Bozhilova, C. Ceresola, C. Colabuono, M. Cooke, G. Depaix, A. Genchev, G. Koykov, W. Mees, M. Merialdo, A. Voulgaridis, T. Tsikrika, K. Votis, S. Vrochidis, "Leveraging Cyber Ranges for Prototyping, Certification and Training: The ECHO case.", in Proceedings of the IEEE International Conference on Cyber Security and Resilience (CSR), July 27-29, 2022, pp. 299-304. DOI: 10.1109/CSR54599.2022.9850278
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Ontology-based technologies for disaster preparedness, response and recovery

P. Masa, G. Tzanetis, S. Kintzios, G. Meditskos, S. Vrochidis, I. Vourvachis, L. Nerantzis, I. Kompatsiaris, "Ontology-based technologies for disaster preparedness, response and recovery.", in Proceedings of the 9th International Conference on Civil Protection & New Technologies (SafeThessaloniki 2022), Thessaloniki, Greece, 29 September - 1 October 2022.
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The Threat of Behavioral Radicalization Online: Conceptual Challenges and Technical Solutions Provided by the PROPHETS (Preventing Radicalization Online through the Proliferation of Harmonized ToolkitS) Project

R. Karlović, H. Nitsch, E. Fikenscher, D. Osterman, S. Menexis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, A. Sahar, "The Threat of Behavioral Radicalization Online: Conceptual Challenges and Technical Solutions Provided by the PROPHETS (Preventing Radicalization Online through the Proliferation of Harmonized ToolkitS) Project.", in Security Technologies and Social Implications: A European Perspective, G. Markarian, R. Karlović, H. Nitsch, and K. Chandramouli, Eds., 2022 (accepted for publication).
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ICT in Healthcare: the role of IoT and the SECANT solution

M. Caballero, D. Kavallieros, A. Spyros, A. Tavernarakis, A. Tziouvaras, S. Bonacina, K. Chandrarmouli, M. Coroiu, L. Chen, T. Dounia, I. Giannoulakis, N. Gligoricx , E. Kafetzakis, T. Kasig, V. Koumaras, T. Krousarlis, K. Lapidaki, A. Markakis, S. Marin, M. Manulis, S. Menesidou, S. Nifakos, L. Meng, S. Mhiri, M. Nat, K. Ntafloukas, D. Oniga, D. Papamartzivanos, S. Papastergiou, K. Sanchez, C. Sakkas, K. Stelliou, L. Trujillo, T. Tsikrika, E. Venegas, S. Vrochidis, D. Xydias, "ICT in Healthcare: the role of IoT and the SECANT solution.", in Proceedings of the IEEE International Conference on Cyber Security and Resilience (CSR), 27-29 July, 2022, pp. 104-111.
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An Explainable Multimodal Fusion Approach for Mass Casualty Incidents

Z. Vasileiou, G. Meditskos, S. Vrochidis, N. Bassiliades, "An Explainable Multimodal Fusion Approach for Mass Casualty Incidents.", in Proceedings of the 4th International Workshop on Machine Learning and Knowledge Graphs At 33rd International Conference on Database and Expert Systems Applications, DEXA 2022, Vienna, Austria, August 22-24, 2022.
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BiasHash: A Bayesian Hashing Framework for Image Retrieval

M. Pegia, A. Moumtzidou, I. Gialampoukidis, B. Johnsson, S. Vrochidis, I. Kompatsiaris, "BiasHash: A Bayesian Hashing Framework for Image Retrieval.", in Proceedings of the IEEE 14th Image, Video, and Multidimensional Signal Processing Workshop (IVMSP 2022), Nafplio, Greece, 26-29 June 2022. DOI: 10.1109/IVMSP54334.2022.9816233
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Web Bot Detection Evasion Using Deep Reinforcement Learning

C. Iliou, T. Kostoulas, T. Tsikrika, V. Katos, S. Vrochidis, I. Kompatsiaris, "Web Bot Detection Evasion Using Deep Reinforcement Learning.", in Proceedings of the 17th International Conference on Availability, Reliability and Security (ARES 2022), ACM, 23-26 August, 2022, pp. 1 - 10. DOI:10.1145/3538969.3538994
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Cybersecurity in Next Generation Energy Grids: Challenges and Opportunities for Blockchain and AI Technologies

N. Mengidis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "Cybersecurity in Next Generation Energy Grids: Challenges and Opportunities for Blockchain and AI Technologies.", in Digital Transformation, Cyber Security and Resilience of Modern Societies, T. Tagarev, K. T. Atanassov, V. Kharchenko, and J. Kacprzyk, Eds., Studies in Big Data, vol 84. Springer, Cham, pp. 299-314. DOI:https://doi.org/10.1007/978-3-030-65722-2_18
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Cyber security certification programmes

E. C. Davri, E. Darra, I. Monogioudis, A. Grigoriadis, C. Iliou, N. Mengidis, T. Tsikrika, S. Vrochidis, A. Peratikou, H. Gibson, D. Haskovic, D. Kavallieros, E. Chaskos, P. Zhao, S. Shiaeles, N. Savage, B. Akhgar, X. Bellekens, M. Amine Ben Farah, "Cyber security certification programmes.", in Proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience (IEEE CSR) – Workshops, Virtual Conference, July 26 (Monday) – 28 (Wednesday), 2021, pp. 428-435. DOI: 10.1109/CSR51186.2021.9527974
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Severity level assessment from semantically fused video content analysis for physical threat detection in ground segments of space systems

G. Antzoulatos, G. Orfanidis, P. Giannakeris, G. Tzanetis, G. Stathopoulos, N. Kopalidis, I. Gialampoukidis, S. Vrochidis, I. Kompatsiaris, "Severity level assessment from semantically fused video content analysis for physical threat detection in ground segments of space systems.", in Proceedings of the 2nd International Workshop on Cyber-Physical Security for Critical Infrastructures Protection (CPS4CIP 2021), 4-8 October 2021.
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OntoAqua: Ontology-based Modelling of Context in Water Safety and Security

Α. M. Koufakis, S. Tzanakis, A. Moumtzidou, G. Meditskos, A. Karakostas, S. Vrochidis, I. Kompatsiaris, "OntoAqua: Ontology-based Modelling of Context in Water Safety and Security.", in Proceedings of the 13th International Conference on Knowledge Engineering and Ontology Development-KEOD 2021, Valletta, Malta, 25-27 October, 2021.
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ECHO Federated Cyber Range: Towards Next-Generation Scalable Cyber Ranges

N. Oikonomou, N. Mengidis, M. Karalexidis, A. Voulgaridis, M. Merialdo, I. Raisr, K. Hanson, P. Vallee, T. Tsikrika, S. Vrochidis, K. Votis, "ECHO Federated Cyber Range: Towards Next-Generation Scalable Cyber Ranges.", in Proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience (IEEE CSR) – Workshops, Virtual Conference, Virtual, July 26 - 28, 2021.
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Towards Selecting Informative Content for Cyber Threat Intelligence

P. Panagiotou, C. Iliou, K. Apostolou, T. Tsikrika, S. Vrochidis, P. Chatzimisios, I. Kompatsiaris, "Towards Selecting Informative Content for Cyber Threat Intelligence.", in Proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience (IEEE CSR) – Workshops, Virtual Conference, July 26 (Monday) – 28 (Wednesday), 2021, pp. 354-359. DOI: 10.1109/CSR51186.2021.9527909
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Named Entity Recognition in Cyber Threat Intelligence Using Transformer-based Models

P. Evangelatos, C. Iliou, T. Mavropoulos, K. Apostolou, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "Named Entity Recognition in Cyber Threat Intelligence Using Transformer-based Models.",in Proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience (IEEE CSR) – Workshops, Virtual Conference, July 26 (Monday) – 28 (Wednesday), 2021, pp. 348-353. DOI: 10.1109/CSR51186.2021.9527981
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Sensor Data Fusion and Autonomous Unmanned Vehicles for the Protection of Critical Infrastructures

K. Ioannidis, G. Orfanidis, M. Krestenitis, S. Vrochidis, I. Kompatsiaris, "Sensor Data Fusion and Autonomous Unmanned Vehicles for the Protection of Critical Infrastructures.", in Terahertz (THz), Mid Infrared (MIR) and Near Infrared (NIR) Technologies for Protection of Critical Infrastructures Against Explosives and CBRN, NATO Science for Peace and Security Series B: Physics and Biophysics, Springer Netherlands, 2021, pp. 3–17.
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Crowd Violence Detection from Video Footage

K. Gkountakos, K. Ioannidis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "Crowd Violence Detection from Video Footage.", in Proceedings of the 2021 International Conference on Content-Based Multimedia Indexing (CBMI), IEEE, June 2021.
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Web Bot Detection Evasion Using Generative Adversarial Networks

C. Iliou, T. Kostoulas, T. Tsikrika, V. Katos, S. Vrochidis, I. Kompatsiaris, "Web Bot Detection Evasion Using Generative Adversarial Networks.", in Proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience, IEEE, 26-28 July, 2021. DOI: 10.1109/CSR51186.2021.9527915
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ITI-CERTH participation in TRECVID 2020

K. Gkountakos, D. Galanopoulos, M. Mpakratsas, D. Touska, A. Moumtzidou, K. Ioannidis, I. Gialampoukidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation in TRECVID 2020.", in Proceedings of the TRECVID 2020 Workshop, Gaithersburg, MD, USA, December 2020.
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OSINT and the Dark Web

G. Kalpakis, T. Tsikrika, N. Cunningham, C. Iliou, S. Vrochidis, J. Middleton, I. Kompatsiaris, "OSINT and the Dark Web", in Open Source Intelligence Investigation: From Strategy to Implementation, B. Akhgar, P. S. Bayerl, F. Sampson, Eds., Cham, Switzerland: Springer, 3 January, 2017, pp. 111–132.
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Analysis of Suspended Terrorism-Related Content on Social Media

G. Kalpakis, T. Tsikrika, I. Gialampoukidis, S. Papadopoulos, S. Vrochidis, I. Kompatsiaris, "Analysis of Suspended Terrorism-Related Content on Social Media", in Community-Oriented Policing and Technological Innovations, G. Leventakis and M. R. Haberfeld, Eds., Cham, Switzerland: Springer, 27 April, 2018, pp. 107–118.
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Query reformulation based on word embeddings: A comparative study

P. Panagiotou, G. Kalpakis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, "Query reformulation based on word embeddings: A comparative study", in Technology Advances and Support for Security Practitioners, B. Akhgar, D. Kavallieros, and E. Sdongos, Eds., Security Informatics and Law Enforcement, Springer, 2021.
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IoT and Semantic Web Technologies

A. Chatzimichail, E. Stathopoulos, D. Ntioudis, A. Tsanousa, M. Rousi, A. Mavropoulos, G. Meditskos, S. Vrochidis, I. Kompatsiaris, "IoT and Semantic Web Technologies.", in Semantic IoT: Theory and Applications - Interoperability, Provenance and Beyond, Studies in Computational Intelligence, Springer, 2020, p. 3-33.
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TENSOR: Retrieval and Analysis of Heterogeneous Online Content for Terrorist Activity Recognition

B. Akhgar, P. Bertrand, C. Chalanouli, T. Day, I. Fragkiadakis, H. Gibson, D. Kavallieros, E. Kermitsis, I. Kompatsiaris, E. Kyriakou, G. Leventakis, E. Lissaris, S. Mille, D. Myttas, T. Tsikrika, S. Vrochidis, U. Williamson, "TENSOR: Retrieval and Analysis of Heterogeneous Online Content for Terrorist Activity Recognition", Proceedings of the Estonian Academy of Security Sciences: Secure Societies, pp. 33-82, 15 June, 2017.
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The Backbone of Decision Support Systems: The Sensor to Decision Chain

P. Hertweck, J. Mossgraber, E. Kontopoulos, P. Mitzias, T. Hellmund, A. Karakostas, D. Hilbring, H. van der Schaaf, S. Vrochidis, J. W. Blume, I. Kompatsiaris, "The Backbone of Decision Support Systems: The Sensor to Decision Chain", International Journal of Information Systems for Crisis Response and Management (IJISCRAM), vol. 10, no. 4, pp. 65-87, 29 August, 2019.
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Concept extraction from patent images based on recursive hybrid classification

A. Moumtzidou, S. Vrochidis, I. Kompatsiaris, "Concept extraction from patent images based on recursive hybrid classification.", in Proceedings of the 6th Information Retrieval Facility Conference 2013 (IRFC 2013), Multidisciplinary Information Retrieval, Springer Berlin Heidelberg, Vol. 8201, Limassol, Cyprus, 7-9 October, 2013, pp. 83-86. https://doi.org/10.1007/978-3-642-41057-4_9
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ITI-CERTH participation to TRECVID 2013

F. Markatopoulou, A. Moumtzidou, C. Tzelepis, K. Avgerinakis, N. Gkalelis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation to TRECVID 2013", in Proceedings of the TRECVID 2013 Workshop, Gaithersburg, MD, USA, 2013.
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ITI-CERTH participation to TRECVID 2014

N. Gkalelis, F. Markatopoulou, A. Moumtzidou, D. Galanopoulos, K. Avgerinakis, N. Pittaras, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras, "ITI-CERTH participation to TRECVID 2014", in Proceedings of the TRECVID 2014 Work-shop, Orlando, FL, USA, November 2014.
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VERGE: A Multimodal Interactive Video Search Engine

A. Moumtzidou, K. Avgerinakis, E. Apostolidis, F. Markatopoulou, K. Apostolidis, T. Mironidis, S. Vrochidis, V. Mezaris, Y. Kompatsiaris, I. Patras, "VERGE: A Multimodal Interactive Video Search Engine.", in Proceedings of the 21st Int. Conf. on MultiMedia Modeling (MMM15), Sydney, Australia, January 2015. https://doi.org/10.1007/978-3-319-14442-9_23
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The Sensor to Decision Chain in Crisis Management

J. Mossgraber, D. Hilbring, H. van der Schaaf, P. Hertweck, E. Kontopoulos, P. Mitzias, I. Kompatsiaris, S. Vrochidis, A. Karakostas, "The Sensor to Decision Chain in Crisis Management", in Proceedings of the Int. Conf. on Information Systems for Crisis Response and Management (ISCRAM'18).
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Concept Detection on Multimedia Web Resources about Home Made Explosives

G. Kalpakis, T. Tsikrika, F. Markatopoulou, N. Pittaras, S. Vrochidis, V. Mezaris, I. Patras, I. Kompatsiaris, "Concept Detection on Multimedia Web Resources about Home Made Explosives.", in Proceedings of the International Workshop on Multimedia Forensics and Security (MFSec 2015), held in conjunction with the 10th International Conference on Availability, Reliability and Security, Toulouse, France, 2015. DOI: 10.1109/ARES.2015.85
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A Framework for the Discovery, Analysis, and Retrieval of Multimedia Homemade Explosives Information on the Web

T. Tsikrika, G. Kalpakis, S. Vrochidis, I. Kompatsiaris, I. Paraskakis, I. Kavasidis, J. Middleton, U. Williamson, "A Framework for the Discovery, Analysis, and Retrieval of Multimedia Homemade Explosives Information on the Web.", in Proceedings of the International Workshop on Multimedia Forensics and Security (MFSec 2015), held in conjunction with the 10th International Conference on Availability, Reliability and Security, Toulouse, France, 2015. https://doi.org/10.1109/ARES.2015.86
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ITI-CERTH participation to TRECVID 2015

F. Markatopoulou, A. Ioannidou, C. Tzelepis, T. Mironidis, D. Galanopoulos, S. Arestis-Chartampilas, N. Pittaras, K. Avgerinakis, N. Gkalelis, A. Moumtzidou, S. Vrochidis, V. Mezaris, I. Kompatsiaris, I. Patras, "ITI-CERTH participation to TRECVID 2015.", in Proceedings of the TRECVID 2015 Workshop, Gaithersburg, MD, USA, November 2015.
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Ontology-based Representation of Crisis Management Procedures for Climate Events

E. Kontopoulos, P. Mitzias, J. Mossgraber, P. Hertweck, H. van der Schaaf, X. Hilbring, F. Lombardo, D. Norbiato, M. Ferri, A. Karakostas, S. Vrochidis, I. Kompatsiaris, "Ontology-based Representation of Crisis Management Procedures for Climate Events", in Proceedings of the 1st International Workshop on Intelligent Crisis Management Technologies for Climate Events (ICMT 2018), collocated with the 15th International Conference on Information Systems for Crisis Response and Management (ISCRAM 2018).
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Social Media Observations for Flood Event Monitoring in Italy over a One-Year Period

S. Andreadis, I. Gialampoukidis, R. Fiorin, F. Lombardo, D. Norbiato, A. Karakostas, M. Ferri, S. Vrochidis, I. Kompatsiaris, "Social Media Observations for Flood Event Monitoring in Italy over a One-Year Period", in Proceedings of the 2nd International Conference Citizen Observatories for natural hazards and Water Management (COWM 2018), Venezia, Italy, 27-30 November 2018.
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A Crisis Classification System for flood risk assessment: the beAWARE project

G. S. Antzoulatos, A. Karakostas, S. Vrochidis, F. Lombardo, D. Norbiato, M. Ferri, I. Kompatsiaris, "A Crisis Classification System for flood risk assessment: the beAWARE project", in Proceedings of the 2nd International Conference Citizen Observatories for natural hazards and Water Management (COWM 2018), Venezia, Italy, 27-30 November 2018.
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1st International Workshop on Search and Mining Terrorist Online Content & Advances in Data Science for Cyber Security and Risk on the Web

T. Tsikrika, B. Akhgar, V. Katos, S. Vrochidis, P. Burnap, M. L. Williams, "1st International Workshop on Search and Mining Terrorist Online Content & Advances in Data Science for Cyber Security and Risk on the Web", in Proceedings of the Tenth ACM International Conference on Web Search and Data Mining (WSDM 2017), Cambridge, UK, February 2017, pp. 823-824.
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ITI-CERTH participation in TRECVID 2018

K. Avgerinakis, A. Moumtzidou, D. Galanopoulos, G. Orfanidis, S. Andreadis, F. Markatopoulou, E. Batziou, K. Ioannidis, S. Vrochidis, V. Mezaris, I. Kompatsiaris, "ITI-CERTH participation in TRECVID 2018", in Proceedings of the TRECVID 2018 Workshop, Gaithersburg, MD, USA, November 2018.
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