Concept Detection in Multimedia Web Resources About Home Made Explosives. - George Kalpakis; Theodora Tsikrika; Fotini Markatopoulou; Nikiforos Pittaras; Stefanos Vrochidis; Vasileios Mezaris; Ioannis Patras; Ioannis Kompatsiaris (ARES, 2015)

A Framework for the Discovery, Analysis, and Retrieval of Multimedia Homemade Explosives Information on the Web. - Theodora Tsikrika; George Kalpakis; Stefanos Vrochidis; Ioannis Kompatsiaris; Iraklis Paraskakis; Isaak Kavasidis; Jonathan Middleton; Una Williamson (ARES, 2015)

Hybrid Focused Crawling for Homemade Explosives Discovery on Surface and Dark Web. - Christos Iliou; George Kalpakis; Theodora Tsikrika; Stefanos Vrochidis; Ioannis Kompatsiaris (ARES, 2016)

Key Player Identification in Terrorism-Related Social Media Networks Using Centrality Measures. - Ilias Gialampoukidis; George Kalpakis; Theodora Tsikrika; Stefanos Vrochidis; Ioannis Kompatsiaris (EISIC, 2016)

Interactive Discovery and Retrieval of Web Resources Containing Home Made Explosive Recipes. - George Kalpakis; Theodora Tsikrika; Christos Iliou; Thodoris Mironidis; Stefanos Vrochidis; Jonathan Middleton; Una Williamson; Ioannis Kompatsiaris (HCI (20), 2016)

A Monitoring Tool for Terrorism-Related Key-Players and Key-Communities in Social Media Networks. - Stelios Andreadis; Ilias Gialampoukidis; George Kalpakis; Theodora Tsikrika; Symeon Papadopoulos; Stefanos Vrochidis; Ioannis Kompatsiaris (EISIC, 2017)

Detection of Terrorism-related Twitter Communities using Centrality Scores. - Ilias Gialampoukidis; George Kalpakis; Theodora Tsikrika; Symeon Papadopoulos; Stefanos Vrochidis; Ioannis Kompatsiaris (MFSec@ICMR, 2017)

Hybrid focused crawling on the Surface and the Dark Web. - Christos Iliou; George Kalpakis; Theodora Tsikrika; Stefanos Vrochidis; Ioannis Kompatsiaris (EURASIP J. Inf. Secur., 2017)

Adaptive Focused Crawling Using Online Learning - A Study on Content Related to Islamic Extremism. - Christos Iliou; Theodora Tsikrika; George Kalpakis; Stefanos Vrochidis; Ioannis Kompatsiaris (INSCI, 2018)

An Enhanced Cyber Attack Attribution Framework. - Nikolaos Pitropakis; Emmanouil Panaousis; Alkiviadis Giannakoulias; George Kalpakis; Rodrigo Diaz Rodriguez; Panayiotis Sarigiannidis (TrustBus, 2018)

A comparative study of clustering methods using word embeddings. - Nikolaos Bastas; George Kalpakis; Theodora Tsikrika; Stefanos Vrochidis; Ioannis Kompatsiaris (EISIC, 2019)

Identifying Terrorism-Related Key Actors in Multidimensional Social Networks. - George Kalpakis; Theodora Tsikrika; Stefanos Vrochidis; Ioannis Kompatsiaris (MMM (2), 2019)

Deploying Semantic Web Technologies for Information Fusion of Terrorism-related Content and Threat Detection on the Web. - Panagiotis Mitzias; Efstratios Kontopoulos; James Staite; Tony Day; George Kalpakis; Theodora Tsikrika; Helen Gibson; Stefanos Vrochidis; Babak Akhgar; Ioannis Kompatsiaris (WI (Companion), 2019)

An Extensible Framework for Interactive Real-Time Visualizations of Large-Scale Heterogeneous Multimedia Information from Online Sources. - Aikaterini Katmada; George Kalpakis; Theodora Tsikrika; Stelios Andreadis; Stefanos Vrochidis; Ioannis Kompatsiaris (MMM (2), 2020)

Automatic Visual Recognition of Unexploded Ordnances Using Supervised Deep Learning. - Georgios Begkas; Panagiotis Giannakeris; Konstantinos Ioannidis; Georgios Kalpakis; Theodora Tsikrika; Stefanos Vrochidis; Ioannis Kompatsiaris (ICMR, 2022)

Innovative Digital Forensic and Investigation Tools for Law Enforcement: The EMPOWER & TRACY Approach. - Nikos Avgerinos; Panagiotis Mertis; Manolis Tsagaris; Nikos Desipris; George L. Lyberopoulos; Elina Theodoropoulou; Konstantinos Filis; Jelena Sarajlic; Manuel Pastor; Despoina Chatzakou; George Kalpakis; Christos Chatzikonstantinou; et al. (AIAI (Workshops), 2024)