Using Parallelism and Pipeline for the Optimisation of Join Queries. - Myra Spiliopoulou; Michael Hatzopoulos; Costas Vassilakis 001 (PARLE, 1992)

Transaction Support in a Temporal DBMS - Costas Vassilakis 001; Nikos A. Lorentzos; Panagiotis Georgiadis 001 (Temporal Databases, 1995)

A Comparative Study of Temporal DBMS Architectures. - Costas Vassilakis 001; Panagiotis Georgiadis 001; Anya Sotiropoulou (DEXA Workshop, 1996)

A Cost Model for the Estimation Query Execution Time in a Parallel Environment Supporting Pipeline. - Myra Spiliopoulou; Michael Hatzopoulos; Costas Vassilakis 001 (Comput. Artif. Intell., 1996)

Implementing Embedded Valid Time Query Languages. - Costas Vassilakis 001; Panagiotis Georgiadis 001; Timos K. Sellis (DEXA, 1998)

Temporal Extension to ODMG. - Anya Sotiropoulou; Michael Souillard; Costas Vassilakis 001 (IADT, 1998)

TOOBIS: Application de la gestion de données temporelles dans le domaine de la recherche clinique. - Michael Souillard; Costas Vassilakis 001; Anya Sotiropoulou (INFORSID, 1998)

Implementation of Transaction and Concurrency Control Support in a Temporal DBMS. - Costas Vassilakis 001; Nikos A. Lorentzos; Panagiotis Georgiadis 001 (Inf. Syst., 1998)

Distributed Information Systems Tailorability: A Component Approach. - Dimitrios Theotokis; Georgios-Dimitrios Kapos; Costas Vassilakis 001; Anya Sotiropoulou; Georgios Gyftodimos (FTDCS, 1999)

Function Oriented History Representation in Databases. - László Kovács; Costas Vassilakis 001 (Comput. Artif. Intell., 2000)

An Optimisation Scheme for Coalesce/Valid Time Selection Operator Sequences. - Costas Vassilakis 001 (SIGMOD Rec., 2000)

Designing a virtual museum within a museum. - Dimitrios Charitos; George Lepouras; Costas Vassilakis 001; Vivi Katifori; A. Charissi; L. Halatsi (Virtual Reality, Archeology, and Cultural Heritage, 2001)

Controlled Caching of Dynamic WWW Pages. - Costas Vassilakis 001; Giorgos Lepouras (DEXA, 2002)

Serving Enhanced Hypermedia Information. - George Lepouras; Costas Vassilakis 001; George R. S. Weir (ECIR, 2002)

SmartGov: A Knowledge-Based Platform for Transactional Electronic Services. - Panagiotis Georgiadis 001; Giorgos Lepouras; Costas Vassilakis 001; G. Boukis; Efthimios Tambouris; Stelios Gorilas; Elisabeth Davenport; Ann Macintosh; John Fraser; Dave Lochhead (EGOV, 2002)

Transactional e-Government Services: An Integrated Approach. - Costas Vassilakis 001; Giorgos Laskaridis; Giorgos Lepouras; Stathis Rouvas; Panagiotis Georgiadis 001 (EGOV, 2002)

An Object-Oriented Approach for Designing Administrative E-forms and Transactional E-services. - Dimitris Gouscos; Stathis Rouvas; Costas Vassilakis 001; Panagiotis Georgiadis 001 (OOIS, 2002)

Improving e-Form Layout Through Analysis of Form Semantics and Validation Checks. - Costas Vassilakis 001; George Lepouras; Stathis Rouvas; Panagiotis Georgiadis 001 (CAiSE Short Paper Proceedings, 2003)

Facilitating VR Museums Web Presence. - George Lepouras; Akrivi Katifori; Costas Vassilakis 001; Anna Harissi (HCI (4), 2003)

A framework for managing the lifecycle of transactional e-government services. - Costas Vassilakis 001; Giorgos Laskaridis; Giorgos Lepouras; Stathis Rouvas; Panagiotis Georgiadis 001 (Telematics Informatics, 2003)

Content Enrichment Through Dynamic Annotation. - George R. S. Weir; George Lepouras; Costas Vassilakis 001 (ICEIS (5), 2004)

Integrating e-government public transactional services into public authority workflows. - Costas Vassilakis 001; George Lepouras; Stathis Rouvas; Panagiotis Georgiadis 001 (Electron. Gov. an Int. J., 2004)

Real exhibitions in a virtual museum. - George Lepouras; Akrivi Katifori; Costas Vassilakis 001; Dimitrios Charitos (Virtual Real., 2004)

Virtual museums for all: employing game technology for edutainment. - George Lepouras; Costas Vassilakis 001 (Virtual Real., 2004)

An XML model for electronic services. - Costas Vassilakis 001; George Lepouras; Constantin Halatsis; Tomás Pariente Lobo (Electron. Gov. an Int. J., 2005)

A flexible framework for managing temporal clinical trial data. - Michael Souillard; Carine Souveyet; Costas Vassilakis 001; Anya Sotiropoulou (Int. J. Electron. Heal., 2005)

Exploiting form semantics and validation checks to improve e-form layout. - Costas Vassilakis 001; George Lepouras; Stathis Rouvas; Panagiotis Georgiadis 001 (Int. J. Web Eng. Technol., 2005)

Visualizing a temporally-enhanced ontology. - Akrivi Katifori; Costas Vassilakis 001; George Lepouras; Ilias Daradimos; Constantin Halatsis (AVI, 2006)

Creating an Historical Archive Ontology: Guidelines and Evaluation. - Elena Torou; Akrivi Katifori; Costas Vassilakis 001; George Lepouras; Constantin Halatsis (ICDIM, 2006)

Reverse engineering electronic services from e-forms to knowledge. - Costas Vassilakis 001; George Lepouras; Akrivi Katifori (ICSOFT (1), 2006)

A Context-Based Adaptive Visualization Environment. - Maria Golemati; Constantin Halatsis; Costas Vassilakis 001; Akrivi Katifori; Giorgos Lepouras (IV, 2006)

A Comparative Study of Four Ontology Visualization Techniques in Protege: Experiment Setup and Preliminary Results. - Akrivi Katifori; Elena Torou; Constantin Halatsis; Giorgos Lepouras; Costas Vassilakis 001 (IV, 2006)

Component reuse in electronic services development. - Costas Vassilakis 001; George Lepouras (J. Comput. Methods Sci. Eng., 2006)

Performance Analysis of dual priority single-buffered blocking Multistage Interconnection Networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (ICNS, 2007)

Enhancing BPEL scenarios with Dynamic Relevance-Based Exception Handling. - Christos Kareliotis; Costas Vassilakis 001; Panagiotis Georgiadis 001 (ICWS, 2007)

Evaluating the Significance of the Windows Explorer Visualization in Personal Information Management Browsing tasks. - Maria Golemati; Akrivi Katifori; Eugenia G. Giannopoulou; Ilias Daradimos; Costas Vassilakis 001 (IV, 2007)

Performance Evaluation of Two-Priority Network Schema for Single-Buffered Delta Networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001; Euripidis Glavas (PIMRC, 2007)

Creating an Ontology for the User Profile: Method and Applications. - Akrivi Katifori; Maria Golemati; Costas Vassilakis 001; George Lepouras; Constantin Halatsis (RCIS, 2007)

Historical Archive Ontologies Requirements, Modeling and Visualization. - Akrivi Katifori; Costas Vassilakis 001; Elena Torou; George Lepouras; Constantin Halatsis; Ilias Daradimos (RCIS, 2007)

Domain expert user development: the smartgov approach. - George Lepouras; Costas Vassilakis 001; Constantin Halatsis; Panagiotis Georgiadis 001 (Commun. ACM, 2007)

Ontology visualization methods - a survey. - Akrivi Katifori; Constantin Halatsis; George Lepouras; Costas Vassilakis 001; Eugenia G. Giannopoulou (ACM Comput. Surv., 2007)

A knowledge-based approach for developing multi-channel e-government services. - Costas Vassilakis 001; Giorgos Lepouras; Constantin Halatsis (Electron. Commer. Res. Appl., 2007)

Virtual reality in the e-Society. - George D. Magoulas; Giorgos Lepouras; Costas Vassilakis 001 (Virtual Real., 2007)

Improving Performance of Finite-Buffered Blocking Delta Networks with 2-Class Priority Routing through Asymmetric-Sized Buffer Queues. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (AICT, 2008)

A game-engine based virtual museum authoring and presentation system. - Victor A. Mateevitsi; Michael Sfakianos; George Lepouras; Costas Vassilakis 001 (DIMEA, 2008)

Routing and Performance Analysis of Double-Buffered Omega Networks Supporting Multi-class Priority Traffic. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001; Euripidis Glavas (ICSNC, 2008)

Exception resolution for BPEL processes: a middleware-based framework and performance evaluation. - Christos Kareliotis; Costas Vassilakis 001; Stathis Rouvas; Panagiotis Georgiadis 001 (iiWAS, 2008)

Using Spreading Activation through Ontologies to Support Personal Information Management. - Akrivi Katifori; Costas Vassilakis 001; Alan J. Dix (CSKGOI, 2008)

An Interview-Based User Study on the use of Visualizations for Folder Browsing. - Maria Golemati; Akrivi Katifori; Eugenia G. Giannopoulou; Ilias Daradimos; Costas Vassilakis 001; George Lepouras; Constantin Halatsis (IV, 2008)

Supporting Research in Historical Archives: Historical Information Visualization and Modeling Requirements. - Akrivi Katifori; Elena Torou; Costas Vassilakis 001; Constantin Halatsis (IV, 2008)

WhereRU: GPS position reporting and a personal ontology as a virtual community utility. - Ilias Daradimos; Akrivi Katifori; Costas Vassilakis 001 (RCIS, 2008)

Selected results of a comparative study of four ontology visualization methods for information retrieval tasks. - Akrivi Katifori; Elena Torou; Costas Vassilakis 001; Giorgos Lepouras; Constantin Halatsis (RCIS, 2008)

Performance Evaluation of Multicast Routing over Multilayer Multistage Interconnection Networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001; Euripidis Glavas (AICT, 2009)

QoS-Driven Adaptation of BPEL Scenario Execution. - Christos Kareliotis; Costas Vassilakis 001; Stathis Rouvas; Panagiotis Georgiadis 001 (ICWS, 2009)

A Framework For Adaptation In secure Web Services. - Costas Vassilakis 001; Christos Kareliotis (MCIS, 2009)

IQoS-aware exception resolution for BPEL processes: a middleware-based framework and performance evaluation. - Christos Kareliotis; Costas Vassilakis 001; Efstathios Rouvas; Panagiotis Georgiadis 001 (Int. J. Web Grid Serv., 2009)

A heuristics-based approach to reverse engineering of electronic services. - Costas Vassilakis 001; Giorgos Lepouras; Akrivi Katifori (Inf. Softw. Technol., 2009)

Ontologies and the brain: Using spreading activation through ontologies to support personal interaction. - Akrivi Katifori; Costas Vassilakis 001; Alan J. Dix (Cogn. Syst. Res., 2010)

The conceptual model of context for mobile commerce applications. - Poulcheria Benou; Costas Vassilakis 001 (Electron. Commer. Res., 2010)

Spreading Activation over Ontology-Based Resources: from Personal Context to Web Scale Reasoning. - Alan J. Dix; Akrivi Katifori; Giorgos Lepouras; Costas Vassilakis 001; Nadeem Shabir (Int. J. Semantic Comput., 2010)

Performance Study of Multilayered Multistage Interconnection Networks under Hotspot Traffic Conditions. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (J. Comput. Networks Commun., 2010)

Historical research in archives: user methodology and supporting tools. - Elena Torou; Akrivi Katifori; Costas Vassilakis 001; George Lepouras; Constantin Halatsis (Int. J. Digit. Libr., 2010)

From the web of data to a world of action. - Alan J. Dix; Giorgos Lepouras; Akrivi Katifori; Costas Vassilakis 001; Tiziana Catarci; Antonella Poggi; Yannis E. Ioannidis; Miguel Mora; Ilias Daradimos; Nazihah Md. Akim; Shah Rukh Humayoun; Fabio Terella (J. Web Semant., 2010)

A Software Architecture for Provision of Context-Aware Web-based m-Commerce Applications. - Poulcheria Benou; Costas Vassilakis 001 (CIT, 2011)

Supporting User Roles in Ontology Fuzzification. - Manolis Wallace; Panos Alexopoulos; Ioannis Papafragkos; Costas Vassilakis 001 (SMAP, 2011)

Towards a methodological framework for the cognitive-behavioural evaluation of educational e-games. - Angeliki Antoniou; Dimitris Diakakis; George Lepouras; Costas Vassilakis 001 (Int. J. Learn. Technol., 2011)

Performance Analysis of Multilayered Multipriority Asymmetric-Sized Delta Networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (J. Comput. Networks Commun., 2011)

Performance Analysis of Dual-Priority Multilayer Multistage Interconnection Networks under Multicast Environment. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (J. Networks, 2011)

Modelling and performance evaluation of a novel internal-priority routing scheme for finite-buffered multistage interconnection networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001; Euripidis Glavas (Int. J. Parallel Emergent Distributed Syst., 2011)

A context management architecture for m-commerce applications. - Poulcheria Benou; Costas Vassilakis 001 (Central Eur. J. Comput. Sci., 2012)

Wikis in enterprise settings: a survey. - Ioanna Lykourentzou; Foteini Dagka; Katerina Papadaki 002; Giorgos Lepouras; Costas Vassilakis 001 (Enterp. Inf. Syst., 2012)

A distributed recommender system architecture. - Panagiotis Giannikopoulos; Costas Vassilakis 001 (Int. J. Web Eng. Technol., 2012)

Context management for m-commerce applications: determinants, methodology and the role of marketing. - Poulcheria Benou; Costas Vassilakis 001; Adam P. Vrechopoulos (Inf. Technol. Manag., 2012)

Class-Based Weighted Fair Queuing Scheduling on Dual-Priority Delta Networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (J. Comput. Networks Commun., 2012)

Class-based weighted fair queuing scheduling on quad-priority Delta Networks. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (Int. J. Parallel Emergent Distributed Syst., 2012)

User Profiling: Towards a Facebook Game that Reveals Cognitive Style. - Angeliki Antoniou; Ioanna Lykourentzou; Jenny Rompa; Eric Tobias; George Lepouras; Costas Vassilakis 001; Yannick Naudet (GALA, 2013)

Improving museum visitors' Quality of Experience through intelligent recommendations: A visiting style-based approach. - Ioanna Lykourentzou; Xavier Claude; Yannick Naudet; Eric Tobias; Angeliki Antoniou; George Lepouras; Costas Vassilakis 001 (Intelligent Environments (Workshops), 2013)

Adapting WS-BPEL scenario execution using collaborative filtering techniques. - Dionisis Margaris; Panagiotis Georgiadis 001; Costas Vassilakis 001 (RCIS, 2013)

An integrated framework for QoS-based adaptation and exception resolution in WS-BPEL scenarios. - Dionisis Margaris; Costas Vassilakis 001; Panagiotis Georgiadis 001 (SAC, 2013)

OntoFM: A Personal Ontology-based File Manager for the Desktop. - Jenny Rompa; Giorgos Lepouras; Costas Vassilakis 001; Christos Tryfonopoulos (CoRR, 2013)

Modelling and performance study of finite-buffered blocking multistage interconnection networks supporting natively 2-class priority routing traffic. - Dimitris C. Vasiliadis; George E. Rizos; Costas Vassilakis 001 (J. Netw. Comput. Appl., 2013)

Mindmap-Inspired Semantic Personal Information Management. - Jenny Rompa; Christos Tryfonopoulos; Costas Vassilakis 001; George Lepouras (EDBT, 2014)

Towards a learning analytics platform for supporting the educational process. - George Lepouras; Akrivi Katifori; Costas Vassilakis 001; Angeliki Antoniou; Nikos Platis (IISA, 2014)

Visualization Method Effectiveness in Ontology-Based Information Retrieval Tasks Involving Entity Evolution. - Akrivi Katifori; Costas Vassilakis 001; George Lepouras; Elena Torou; Constantin Halatsis (SMAP, 2014)

A collaborative filtering algorithm with clustering for personalized web service selection in business processes. - Dionisis Margaris; Panagiotis Georgiadis 001; Costas Vassilakis 001 (RCIS, 2015)

A hybrid framework for WS-BPEL scenario execution adaptation, using monitoring and feedback data. - Dionisis Margaris; Costas Vassilakis 001; Panagiotis Georgiadis 001 (SAC, 2015)

On Replacement Service Selection in WS-BPEL Scenario Adaptation. - Dionisis Margaris; Panagiotis Georgiadis 001; Costas Vassilakis 001 (SOCA, 2015)

Effectiveness of Visualization for Information Retrieval through Ontologies with Entity Evolution: The Impact of Ontology Modeling. - Akrivi Katifori; Costas Vassilakis 001; George Lepouras; Elena Torou (Int. J. Inf. Retr. Res., 2015)

An integrated framework for adapting WS-BPEL scenario execution using QoS and collaborative filtering techniques. - Dionisis Margaris; Costas Vassilakis 001; Panagiotis Georgiadis 001 (Sci. Comput. Program., 2015)

The Use of Semantics in the CrossCult H2020 Project. - Stavroula Bampatzia; Omar Gustavo Bravo-Quezada; Angeliki Antoniou; Martín López Nores; Manolis Wallace; George Lepouras; Costas Vassilakis 001 (International KEYSTONE Conference, 2016)

Interconnecting Objects, Visitors, Sites and (Hi)Stories Across Cultural and Historical Concepts: The CrossCult Project. - Costas Vassilakis 001; Angeliki Antoniou; George Lepouras; Manolis Wallace; Ioanna Lykourentzou; Yannick Naudet (EuroMed (1), 2016)

Serious Games: Valuable Tools for Cultural Heritage. - Stavroula Bampatzia; Ioannis Bourlakos; Angeliki Antoniou; Costas Vassilakis 001; George Lepouras; Manolis Wallace (GALA, 2016)

Improving QoS delivered by WS-BPEL scenario adaptation through service execution parallelization. - Dionisis Margaris; Costas Vassilakis 001; Panagiotis Georgiadis 001 (SAC, 2016)

Using social media to stimulate history reflection in cultural heritage. - Stavroula Bampatzia; Angeliki Antoniou; George Lepouras; Costas Vassilakis 001; Manolis Wallace (SMAP, 2016)

Pruning and aging for user histories in collaborative filtering. - Dionisis Margaris; Costas Vassilakis 001 (SSCI, 2016)

Recommendation information diffusion in social networks considering user influence and semantics. - Dionisis Margaris; Costas Vassilakis 001; Panagiotis Georgiadis 001 (Soc. Netw. Anal. Min., 2016)

Formalization and Visualization of the Narrative for Museum Guides. - Ioannis Bourlakos; Manolis Wallace; Angeliki Antoniou; Costas Vassilakis 001; George Lepouras; Anna Vassiliki Karapanagiotou (International KEYSTONE Conference, 2017)

Modeling Server Workloads for Campus Email Traffic Using Recurrent Neural Networks. - Spyros Boukoros; Anupiya Nugaliyadde; Angelos K. Marnerides; Costas Vassilakis 001; Polychronis Koutsakis; Kok Wai Wong (ICONIP (5), 2017)

Improving collaborative filtering's rating prediction quality in dense datasets, by pruning old ratings. - Dionisis Margaris; Costas Vassilakis 001 (ISCC, 2017)

Personalized augmented reality experiences in museums using Google Cardboards. - Marinos Theodorakopoulos; Nikos Papageorgopoulos; Andriana Mourti; Angeliki Antoniou; Manolis Wallace; George Lepouras; Costas Vassilakis 001; Nikos Platis (SMAP, 2017)

Improving Collaborative Filtering's Rating Prediction Quality by Considering Shifts in Rating Practices. - Dionisis Margaris; Costas Vassilakis 001 (CBI (1), 2017)

Using Time Clusters for Following Users' Shifts in Rating Practices. - Dionisis Margaris; Costas Vassilakis 001 (Complex Syst. Informatics Model. Q., 2017)

Stimulation of reflection and discussion in museum visits through the use of social media. - Costas Vassilakis 001; Angeliki Antoniou; George Lepouras; Vassilis Poulopoulos; Manolis Wallace; Stavroula Bampatzia; Ioannis Bourlakos (Soc. Netw. Anal. Min., 2017)

Exploiting Internet of Things information to enhance venues' recommendation accuracy. - Dionisis Margaris; Costas Vassilakis 001 (Serv. Oriented Comput. Appl., 2017)

Enhancing User Rating Database Consistency Through Pruning. - Dionisis Margaris; Costas Vassilakis 001 (Trans. Large Scale Data Knowl. Centered Syst., 2017)

Evaluation of Apache Spot's machine learning capabilities in an SDN/NFV enabled environment. - Christos M. Mathas; Olga E. Segou; Georgios Xilouris; Dimitris Christinakis; Michail-Alexandros Kourtis; Costas Vassilakis 001; Anastasios Kourtis (ARES, 2018)

Improving Collaborative Filtering's Rating Prediction Accuracy by Considering Users' Rating Variability. - Dionisis Margaris; Costas Vassilakis 001 (DASC/PiCom/DataCom/CyberSciTech, 2018)

Improving Collaborative Filtering's Rating Prediction Coverage in Sparse Datasets by Exploiting User Dissimilarity. - Dionisis Margaris; Costas Vassilakis 001 (DASC/PiCom/DataCom/CyberSciTech, 2018)

The Human Computer Interaction and Virtual Reality Lab (University of Peloponnese): Overview and Current Challenges. - Angeliki Antoniou; Costas Vassilakis 001; Anastasios Theodoropoulos; George Lepouras (CIRA@EuroMed, 2018)

Personality Analysis of Social Media Influencers as a Tool for Cultural Institutions. - Vassilis Poulopoulos; Costas Vassilakis 001; Angela Antoniou; George Lepouras; Manolis Wallace (EuroMed (1), 2018)

ExhiSTORY: IoT in the service of Cultural Heritage. - Vassilis Poulopoulos; Costas Vassilakis 001; Angela Antoniou; Manolis Wallace; George Lepouras; Martín López Nores (GIIS, 2018)

The Effect of Social Media Trending Topics Related to Cultural Venues' Content. - Vassilis Poulopoulos; Costas Vassilakis 001; Manolis Wallace; Angela Antoniou; George Lepouras (SMAP, 2018)

Query personalization using social network information and collaborative filtering techniques. - Dionisis Margaris; Costas Vassilakis 001; Panagiotis Georgiadis 001 (Future Gener. Comput. Syst., 2018)

exhiSTORY: Smart exhibits that tell their own stories. - Costas Vassilakis 001; Vassilis Poulopoulos; Angeliki Antoniou; Manolis Wallace; George Lepouras; Martín López Nores (Future Gener. Comput. Syst., 2018)

Exploiting Rating Abstention Intervals for Addressing Concept Drift in Social Network Recommender Systems. - Dionisis Margaris; Costas Vassilakis 001 (Informatics, 2018)

Enhancing Rating Prediction Quality Through Improving the Accuracy of Detection of Shifts in Rating Practices. - Dionisis Margaris; Costas Vassilakis 001 (Trans. Large Scale Data Knowl. Centered Syst., 2018)

Social relations versus near neighbours: reliable recommenders in limited information social network collaborative filtering for online advertising. - Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001 (ASONAM, 2019)

Data-driven country safety monitoring terrorist attack prediction. - Dimitris Spiliotopoulos; Costas Vassilakis 001; Dionisis Margaris (ASONAM, 2019)

Exploring Self-organisation in Crowd Teams. - Ioanna Lykourentzou; Antonios Liapis; Costas Papastathis; Konstantinos Papangelis; Costas Vassilakis 001 (I3E Workshops, 2019)

ATMF: A Student-Centered Framework for the Effective Implementation of Alternative Teaching Methods for CSEd. - Anastasios Theodoropoulos; Costas Vassilakis 001; Angeliki Antoniou; Manolis Wallace; George Lepouras (I3E Workshops, 2019)

Improving Collaborative Filtering's Rating Prediction Coverage in Sparse Datasets through the Introduction of Virtual Near Neighbors. - Dionisis Margaris; Dionysios Vasilopoulos; Costas Vassilakis 001; Dimitris Spiliotopoulos (IISA, 2019)

Improving Collaborative Filtering's Rating Prediction Accuracy by Introducing the Common Item Rating Past Criterion. - Dionisis Margaris; Dionysios Vasilopoulos; Costas Vassilakis 001; Dimitris Spiliotopoulos (IISA, 2019)

A Methodology for Generated Text Annotation for High Quality Speech Synthesis. - Dimitris Spiliotopoulos; Costas Vassilakis 001; Dionisis Margaris; Konstantinos Kotis (IISA, 2019)

Citizen Engagement for Transparent and Accountable Policy Modelling. - Dimitris Spiliotopoulos; Dionisis Margaris; Costas Vassilakis 001 (MEDES, 2019)

A Mixed-reality Interaction-driven Game-based Learning Framework. - Dimitris Spiliotopoulos; Dionisis Margaris; Costas Vassilakis 001; Volha Petukhova; Konstantinos Kotis (MEDES, 2019)

On Blockchain Architectures for Trust-Based Collaborative Intrusion Detection. - Nicholas Kolokotronis; Sotirios Brotsis; Georgios Germanos; Costas Vassilakis 001; Stavros Shiaeles (SERVICES, 2019)

PaloAnalytics Project Concept, Scope and Outcomes: An Opportunity for Culture. - Vassilis Poulopoulos; Manolis Wallace; Costas Vassilakis 001; George Lepouras (CI@SMAP, 2019)

TripMentor Project: Scope and Challenges. - Costas Vassilakis 001; Vassilis Poulopoulos; Manolis Wallace; Angeliki Antoniou; George Lepouras (CI@SMAP, 2019)

Improving Collaborative Filtering's Rating Prediction Quality by Exploiting the Item Adoption Eagerness Information. - Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001 (WI, 2019)

Bringing a peripheral, traditional venue to the digital era with targeted narratives. - Angeliki Antoniou; Susana Maria Reboreda-Morillo; George Lepouras; Jason Diakoumakos; Costas Vassilakis 001; Martín López Nores; Catherine Emma Jones (Digit. Appl. Archaeol. Cult. Heritage, 2019)

Editorial for the Special Issue on "Modern Recommender Systems: Approaches, Challenges and Applications". - Costas Vassilakis 001; Dionisis Margaris (Inf., 2019)

Handling uncertainty in social media textual information for improving venue recommendation formulation quality in social networks. - Dionisis Margaris; Costas Vassilakis 001; Dimitris Spiliotopoulos (Soc. Netw. Anal. Min., 2019)

Threat landscape for smart grid systems. - Christos-Minas Mathas; Konstantinos-Panagiotis Grammatikakis; Costas Vassilakis 001; Nicholas Kolokotronis; Vasiliki-Georgia Bilali; Dimitris Kavallieros (ARES, 2020)

Neighbourhood Aging Factors for Limited Information Social Network Collaborative Filtering. - Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001 (ASONAM, 2020)

On Recommending Safe Travel Periods to High Attack Risk Destinations. - Dimitris Spiliotopoulos; Costas Vassilakis 001; Dionisis Margaris (ASONAM, 2020)

Database Knowledge Enrichment Utilizing Trending Topics from Twitter. - Costas Vassilakis 001; Dimitra Maniataki; George Lepouras; Angeliki Antoniou; Dimitris Spiliotopoulos; Vassilis Poulopoulos; Manolis Wallace; Dionisis Margaris (ASONAM, 2020)

Policy Making Analysis and Practitioner User Experience. - Dimitris Koryzis; Fotios Fitsilis; Dimitris Spiliotopoulos; Theocharis Theocharopoulos; Dionisis Margaris; Costas Vassilakis 001 (HCI (41), 2020)

A User Interface for Personalized Web Service Selection in Business Processes. - Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001; Gregory Karagiorgos (HCI (45), 2020)

Semantics-Driven Conversational Interfaces for Museum Chatbots. - Dimitris Spiliotopoulos; Konstantinos Kotis; Costas Vassilakis 001; Dionisis Margaris (HCI (35), 2020)

MOOC Accessibility from the Educator Perspective. - Dimitris Spiliotopoulos; Vassilis Poulopoulos; Dionisis Margaris; Eleni Makri; Costas Vassilakis 001 (HCI (44), 2020)

"Talking" Triples to Museum Chatbots. - Savvas Varitimiadis; Konstantinos Kotis; Dimitris Spiliotopoulos; Costas Vassilakis 001; Dionisis Margaris (HCI (35), 2020)

A Trust Management System for the IoT domain. - Christos-Minas Mathas; Costas Vassilakis 001; Nicholas Kolokotronis (SERVICES, 2020)

An Adaptive Social Network-Aware Collaborative Filtering Algorithm for Improved Rating Prediction Accuracy. - Dionisis Margaris; Anna Kobusinska; Dimitris Spiliotopoulos; Costas Vassilakis 001 (IEEE Access, 2020)

An Algorithm for Density Enrichment of Sparse Collaborative Filtering Datasets Using Robust Predictions as Derived Ratings. - Dionisis Margaris; Dimitris Spiliotopoulos; Gregory Karagiorgos; Costas Vassilakis 001 (Algorithms, 2020)

Hydria: An Online Data Lake for Multi-Faceted Analytics in the Cultural Heritage Domain. - Kimon Deligiannis; Paraskevi Raftopoulou; Christos Tryfonopoulos; Nikos Platis; Costas Vassilakis 001 (Big Data Cogn. Comput., 2020)

Data-Assisted Persona Construction Using Social Media Data. - Dimitris Spiliotopoulos; Dionisis Margaris; Costas Vassilakis 001 (Big Data Cogn. Comput., 2020)

A Semantic Mixed Reality Framework for Shared Cultural Experiences Ecosystems. - Costas Vassilakis 001; Konstantinos Kotis; Dimitris Spiliotopoulos; Dionisis Margaris; Vlasios Kasapakis; Christos-Nikolaos Anagnostopoulos; Georgios M. Santipantakis; George A. Vouros; Theodore Kotsilieris; Volha Petukhova; Andrei Malchanau; Ioanna Lykourentzou; et al. (Big Data Cogn. Comput., 2020)

Improving collaborative filtering's rating prediction coverage in sparse datasets by exploiting the 'friend of a friend' concept. - Dionisis Margaris; Costas Vassilakis 001 (Int. J. Big Data Intell., 2020)

Improving collaborative filtering's rating prediction accuracy by considering users' dynamic rating variability. - Dionisis Margaris; Costas Vassilakis 001 (Int. J. Big Data Intell., 2020)

Multimodal Interaction: Correlates of Learners' Metacognitive Skill Training Negotiation Experience. - Dimitris Spiliotopoulos; Eleni Makri; Costas Vassilakis 001; Dionisis Margaris (Inf., 2020)

What makes a review a reliable rating in recommender systems? - Dionisis Margaris; Costas Vassilakis 001; Dimitris Spiliotopoulos (Inf. Process. Manag., 2020)

Human behaviour in multimodal interaction: main effects of civic action and interpersonal and problem-solving skills. - Eleni Makri; Dimitris Spiliotopoulos; Costas Vassilakis 001; Dionisis Margaris (J. Ambient Intell. Humaniz. Comput., 2020)

Detection of intermittent faults in software programs through identification of suspicious shared variable access patterns. - Panagiotis Sotiropolos; Costas Vassilakis 001 (J. Syst. Softw., 2020)

A fine-grained social network recommender system. - Markos Aivazoglou; Antonios O. Roussos; Dionisis Margaris; Costas Vassilakis 001; Sotiris Ioannidis; Jason Polakis; Dimitris Spiliotopoulos (Soc. Netw. Anal. Min., 2020)

Understanding and Mitigating Banking Trojans: From Zeus to Emotet. - Konstantinos-Panagiotis Grammatikakis; Ioannis Koufos; Nicholas Kolokotronis; Costas Vassilakis 001; Stavros Shiaeles (CSR, 2021)

Cyber-Security Training Evaluation Metrics. - Nikolaos Koutsouris; Costas Vassilakis 001; Nicholas Kolokotronis (CSR, 2021)

A User Interface for Personalising WS-BPEL Scenarios. - Dionisis Margaris; Dimitris Spiliotopoulos; Dionysios Vasilopoulos; Costas Vassilakis 001 (HCI (22), 2021)

An Interface for User-Centred Process and Correlation Between Large Datasets. - Dimitris Spiliotopoulos; Tauheodoros Giannakopoulos; Costas Vassilakis 001; Manolis Wallace; Marina Lantzouni; Vassilis Poulopoulos; Dionisis Margaris (HCI (18), 2021)

A System for Collecting, Managing, Analyzing and Sharing Diverse, Multi-Faceted Cultural Heritage and Tourism Data. - Kimon Deligiannis; Paraskevi Raftopoulou; Christos Tryfonopoulos; Costas Vassilakis 001 (SMAP, 2021)

On Addressing the Low Rating Prediction Coverage in Sparse Datasets Using Virtual Ratings. - Dionisis Margaris; Dimitris Spiliotopoulos; Gregory Karagiorgos; Costas Vassilakis 001; Dionysios Vasilopoulos (SN Comput. Sci., 2021)

Anchoring Effect Mitigation for Complex Recommender System Design. - Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001 (HCI (41), 2022)

Persona Finetuning for Online Gaming Using Personalisation Techniques. - Dimitris Spiliotopoulos; Dionisis Margaris; Kostas N. Koutrakis; Panos I. Philippopoulos; Costas Vassilakis 001 (HCI (42), 2022)

The additional testsuite framework: facilitating software testing and test management. - Panagiotis Sotiropoulos; Costas Vassilakis 001 (Int. J. Web Eng. Technol., 2022)

On Producing Accurate Rating Predictions in Sparse Collaborative Filtering Datasets. - Dionisis Margaris; Costas Vassilakis 001; Dimitris Spiliotopoulos (Inf., 2022)

On Exploiting Rating Prediction Accuracy Features in Dense Collaborative Filtering Datasets. - Dimitris Spiliotopoulos; Dionisis Margaris; Costas Vassilakis 001 (Inf., 2022)

Multichannel Digital Marketing Optimizations through Big Data Analytics in the Tourism and Hospitality Industry. - Damianos P. Sakas; Dimitrios P. Reklitis; Marina C. Terzi; Costas Vassilakis 001 (J. Theor. Appl. Electron. Commer. Res., 2022)

Estimating iSAX Parameters for Efficiency. - Mihalis Tsoukalos; Nikos Platis; Costas Vassilakis 001 (ADBIS (Short Papers), 2023)

RoG§: A Pipeline for Automated Sensitive Data Identification and Anonymisation. - Sotirios Nikoletos; Stefanos Vlachos; Efstathios Zaragkas; Costas Vassilakis 001; Christos Tryfonopoulos; Paraskevi Raftopoulou (CSR, 2023)

Minimizing Software-Rooted Risk through Library Implementation Selection. - Panagiotis Sotiropoulos; Christos-Minas Mathas; Costas Vassilakis 001; Nicholas Kolokotronis (CSR, 2023)

A User Interface for Tuning QoS Parameters in Recommendation-Based Business Process Scenario Adaptation. - Kiriakos Sgardelis; Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001 (WEBIST, 2023)

Rating Prediction Quality Enhancement in Low-Density Collaborative Filtering Datasets. - Dionisis Margaris; Costas Vassilakis 001; Dimitris Spiliotopoulos; Stefanos Ougiaroglou (Big Data Cogn. Comput., 2023)

Improving collaborative filtering's rating prediction accuracy by introducing the experiencing period criterion. - Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001; Dionysios Vasilopoulos (Neural Comput. Appl., 2023)

Disruptive Technologies for Parliaments: A Literature Review. - Dimitris Koryzis; Dionisis Margaris; Costas Vassilakis 001; Konstantinos Kotis; Dimitris Spiliotopoulos (Future Internet, 2023)

Chatbots for Cultural Venues: A Topic-Based Approach. - Vasilis Bouras; Dimitris Spiliotopoulos; Dionisis Margaris; Costas Vassilakis 001; Konstantinos Kotis; Angeliki Antoniou; George Lepouras; Manolis Wallace; Vassilis Poulopoulos (Algorithms, 2023)

Blockchain meets Internet of Things (IoT) forensics: A unified framework for IoT ecosystems. - Sotirios Brotsis; Konstantinos-Panagiotis Grammatikakis; Dimitrios Kavallieros; Antonio I. Mazilu; Nicholas Kolokotronis; Konstantinos Limniotis; Costas Vassilakis 001 (Internet Things, 2023)

Estimating MPdist with SAX and Machine Learning. - Mihalis Tsoukalos; Pantelis Chronis; Nikos Platis; Costas Vassilakis 001 (ADBIS (Short Papers), 2024)

Predicting Agricultural Product and Supplies Prices Using Artificial Intelligence. - Ioannis Dionissopoulos; Fotis Assimakopoulos; Dimitris Spiliotopoulos; Dionisis Margaris; Costas Vassilakis 001 (KMIS, 2024)

Improving Recommendation Quality in Collaborative Filtering by Including Prediction Confidence Factors. - Kiriakos Sgardelis; Dionisis Margaris; Dimitris Spiliotopoulos; Costas Vassilakis 001; Stefanos Ougiaroglou (WEBIST, 2024)

Exploiting Rating Prediction Certainty for Recommendation Formulation in Collaborative Filtering. - Dionisis Margaris; Kiriakos Sgardelis; Dimitris Spiliotopoulos; Costas Vassilakis 001 (Big Data Cogn. Comput., 2024)

The Implementation of "Smart" Technologies in the Agricultural Sector: A Review. - Fotis Assimakopoulos; Costas Vassilakis 001; Dionisis Margaris; Konstantinos Kotis; Dimitris Spiliotopoulos (Inf., 2024)

Challenges and Trends in Student Evaluation of Teaching: Analysis of SET Data from the University of Peloponnese. - Ilias Papadogiannis; Costas Vassilakis 001; Manolis Wallace; Athanassios Katsis (Inf., 2024)

MiniLib: A flow analysis-based approach for attack surface reduction through software debloating. - Loukas Kopanias; Panagiotis Sotiropoulos; Nicholas Kolokotronis; Costas Vassilakis 001 (CSR, 2025)

A generalized, rule-based method for the detection of intermittent faults in software programs. - Panagiotis Sotiropoulos; Costas Vassilakis 001 (J. Syst. Softw., 2025)