Costas Vassilakis

ORCID

Publication Activity (10 Years)

Years Active: 1992-2024
Publications (10 Years): 97

Top Venues

Big Data Cogn. Comput.

SMAP

ASONAM

Soc. Netw. Anal. Min.

Publications

Dionisis Margaris, Kiriakos Sgardelis, Dimitris Spiliotopoulos, Costas Vassilakis
Exploiting Rating Prediction Certainty for Recommendation Formulation in Collaborative Filtering. Big Data Cogn. Comput. 8 (6) (2024)
Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis, Dionysios Vasilopoulos
Improving collaborative filtering's rating prediction accuracy by introducing the experiencing period criterion. Neural Comput. Appl. 35 (1) (2023)
Mihalis Tsoukalos, Nikos Platis, Costas Vassilakis
Estimating iSAX Parameters for Efficiency. ADBIS (Short Papers) (2023)
Vasilis Bouras, Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis, Konstantinos Kotis, Angeliki Antoniou, George Lepouras, Manolis Wallace, Vassilis Poulopoulos
Chatbots for Cultural Venues: A Topic-Based Approach. Algorithms 16 (7) (2023)
Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos, Stefanos Ougiaroglou
Rating Prediction Quality Enhancement in Low-Density Collaborative Filtering Datasets. Big Data Cogn. Comput. 7 (2) (2023)
Sotirios Nikoletos, Stefanos Vlachos, Efstathios Zaragkas, Costas Vassilakis, Christos Tryfonopoulos, Paraskevi Raftopoulou
RoG§: A Pipeline for Automated Sensitive Data Identification and Anonymisation. CSR (2023)
Kiriakos Sgardelis, Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
A User Interface for Tuning QoS Parameters in Recommendation-Based Business Process Scenario Adaptation. WEBIST (2023)
Dimitris Koryzis, Dionisis Margaris, Costas Vassilakis, Konstantinos Kotis, Dimitris Spiliotopoulos
Disruptive Technologies for Parliaments: A Literature Review. Future Internet 15 (2) (2023)
Sotirios Brotsis, Konstantinos-Panagiotis Grammatikakis, Dimitrios Kavallieros, Antonio I. Mazilu, Nicholas Kolokotronis, Konstantinos Limniotis, Costas Vassilakis
Blockchain meets Internet of Things (IoT) forensics: A unified framework for IoT ecosystems. Internet Things 24 (2023)
Panagiotis Sotiropoulos, Christos-Minas Mathas, Costas Vassilakis, Nicholas Kolokotronis
Minimizing Software-Rooted Risk through Library Implementation Selection. CSR (2023)
Maria Polychronaki, Costas Vassilakis, Dimitrios Kogias, Helen C. Leligkou, Ioannis Vagiannis
OPTORER PPE: Optimal routing and exploration of touristic and cultural areas of interest within Attica given personalized adaptive preferences, promoted underlying purpose and interactive experience. PCI (2022)
Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
On Producing Accurate Rating Predictions in Sparse Collaborative Filtering Datasets. Inf. 13 (6) (2022)
Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
On Exploiting Rating Prediction Accuracy Features in Dense Collaborative Filtering Datasets. Inf. 13 (9) (2022)
Panagiotis Sotiropoulos, Costas Vassilakis
The additional testsuite framework: facilitating software testing and test management. Int. J. Web Eng. Technol. 17 (3) (2022)
Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
Anchoring Effect Mitigation for Complex Recommender System Design. HCI (41) (2022)
Damianos P. Sakas, Dimitrios P. Reklitis, Marina C. Terzi, Costas Vassilakis
Multichannel Digital Marketing Optimizations through Big Data Analytics in the Tourism and Hospitality Industry. J. Theor. Appl. Electron. Commer. Res. 17 (4) (2022)
Dimitris Spiliotopoulos, Dionisis Margaris, Kostas N. Koutrakis, Panos I. Philippopoulos, Costas Vassilakis
Persona Finetuning for Online Gaming Using Personalisation Techniques. HCI (42) (2022)
Nicholas Kolokotronis, Sotirios Brotsis, Georgios Germanos, Costas Vassilakis, Stavros Shiaeles
On Blockchain Architectures for Trust-Based Collaborative Intrusion Detection. CoRR (2021)
Konstantinos-Panagiotis Grammatikakis, Ioannis Koufos, Nicholas Kolokotronis, Costas Vassilakis, Stavros Shiaeles
Understanding and Mitigating Banking Trojans: From Zeus to Emotet. CSR (2021)
Dimitris Spiliotopoulos, Tauheodoros Giannakopoulos, Costas Vassilakis, Manolis Wallace, Marina Lantzouni, Vassilis Poulopoulos, Dionisis Margaris
An Interface for User-Centred Process and Correlation Between Large Datasets. HCI (18) (2021)
Konstantinos-Panagiotis Grammatikakis, Ioannis Koufos, Nicholas Kolokotronis, Costas Vassilakis, Stavros Shiaeles
Understanding and Mitigating Banking Trojans: From Zeus to Emotet. CoRR (2021)
Kimon Deligiannis, Paraskevi Raftopoulou, Christos Tryfonopoulos, Costas Vassilakis
A System for Collecting, Managing, Analyzing and Sharing Diverse, Multi-Faceted Cultural Heritage and Tourism Data. SMAP (2021)
Dionisis Margaris, Dimitris Spiliotopoulos, Dionysios Vasilopoulos, Costas Vassilakis
A User Interface for Personalising WS-BPEL Scenarios. HCI (22) (2021)
Christos-Minas Mathas, Konstantinos-Panagiotis Grammatikakis, Costas Vassilakis, Nicholas Kolokotronis, Vasiliki-Georgia Bilali, Dimitris Kavallieros
Threat Landscape for Smart Grid Systems. CoRR (2021)
Dionisis Margaris, Dimitris Spiliotopoulos, Gregory Karagiorgos, Costas Vassilakis, Dionysios Vasilopoulos
On Addressing the Low Rating Prediction Coverage in Sparse Datasets Using Virtual Ratings. SN Comput. Sci. 2 (4) (2021)
Nikolaos Koutsouris, Costas Vassilakis, Nicholas Kolokotronis
Cyber-Security Training Evaluation Metrics. CSR (2021)
Christos-Minas Mathas, Costas Vassilakis, Nicholas Kolokotronis
A Trust Management System for the IoT domain. CoRR (2021)
Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
On Recommending Safe Travel Periods to High Attack Risk Destinations. ASONAM (2020)
Christos-Minas Mathas, Konstantinos-Panagiotis Grammatikakis, Costas Vassilakis, Nicholas Kolokotronis, Vasiliki-Georgia Bilali, Dimitris Kavallieros
Threat landscape for smart grid systems. ARES (2020)
Markos Aivazoglou, Antonios O. Roussos, Dionisis Margaris, Costas Vassilakis, Sotiris Ioannidis, Jason Polakis, Dimitris Spiliotopoulos
A fine-grained social network recommender system. Soc. Netw. Anal. Min. 10 (1) (2020)
Dimitris Spiliotopoulos, Vassilis Poulopoulos, Dionisis Margaris, Eleni Makri, Costas Vassilakis
MOOC Accessibility from the Educator Perspective. HCI (44) (2020)
Dionisis Margaris, Costas Vassilakis
Improving collaborative filtering's rating prediction accuracy by considering users' dynamic rating variability. Int. J. Big Data Intell. 7 (2) (2020)
Dimitris Spiliotopoulos, Eleni Makri, Costas Vassilakis, Dionisis Margaris
Multimodal Interaction: Correlates of Learners' Metacognitive Skill Training Negotiation Experience. Inf. 11 (8) (2020)
Costas Vassilakis, Dimitra Maniataki, George Lepouras, Angeliki Antoniou, Dimitris Spiliotopoulos, Vassilis Poulopoulos, Manolis Wallace, Dionisis Margaris
Database Knowledge Enrichment Utilizing Trending Topics from Twitter. ASONAM (2020)
Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
Data-Assisted Persona Construction Using Social Media Data. Big Data Cogn. Comput. 4 (3) (2020)
Panagiotis Sotiropolos, Costas Vassilakis
Detection of intermittent faults in software programs through identification of suspicious shared variable access patterns. J. Syst. Softw. 159 (2020)
Dimitris Koryzis, Fotios Fitsilis, Dimitris Spiliotopoulos, Theocharis Theocharopoulos, Dionisis Margaris, Costas Vassilakis
Policy Making Analysis and Practitioner User Experience. HCI (41) (2020)
Dimitris Spiliotopoulos, Konstantinos Kotis, Costas Vassilakis, Dionisis Margaris
Semantics-Driven Conversational Interfaces for Museum Chatbots. HCI (35) (2020)
Costas Vassilakis, 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, Kaj Michael Helin, Artem Revenko, Nenad Gligoric, Boris Pokric
A Semantic Mixed Reality Framework for Shared Cultural Experiences Ecosystems. Big Data Cogn. Comput. 4 (2) (2020)
Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
What makes a review a reliable rating in recommender systems? Inf. Process. Manag. 57 (6) (2020)
Eleni Makri, Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
Human behaviour in multimodal interaction: main effects of civic action and interpersonal and problem-solving skills. J. Ambient Intell. Humaniz. Comput. 11 (12) (2020)
Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis, Gregory Karagiorgos
A User Interface for Personalized Web Service Selection in Business Processes. HCI (45) (2020)
Savvas Varitimiadis, Konstantinos Kotis, Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
"Talking" Triples to Museum Chatbots. HCI (35) (2020)
Christos-Minas Mathas, Costas Vassilakis, Nicholas Kolokotronis
A Trust Management System for the IoT domain. SERVICES (2020)
Dionisis Margaris, Dimitris Spiliotopoulos, Gregory Karagiorgos, Costas Vassilakis
An Algorithm for Density Enrichment of Sparse Collaborative Filtering Datasets Using Robust Predictions as Derived Ratings. Algorithms 13 (7) (2020)
Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
Neighbourhood Aging Factors for Limited Information Social Network Collaborative Filtering. ASONAM (2020)
Dionisis Margaris, Costas Vassilakis
Improving collaborative filtering's rating prediction coverage in sparse datasets by exploiting the 'friend of a friend' concept. Int. J. Big Data Intell. 7 (1) (2020)
Kimon Deligiannis, Paraskevi Raftopoulou, Christos Tryfonopoulos, Nikos Platis, Costas Vassilakis
Hydria: An Online Data Lake for Multi-Faceted Analytics in the Cultural Heritage Domain. Big Data Cogn. Comput. 4 (2) (2020)
Dionisis Margaris, Anna Kobusinska, Dimitris Spiliotopoulos, Costas Vassilakis
An Adaptive Social Network-Aware Collaborative Filtering Algorithm for Improved Rating Prediction Accuracy. IEEE Access 8 (2020)
Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
Handling uncertainty in social media textual information for improving venue recommendation formulation quality in social networks. Soc. Netw. Anal. Min. 9 (1) (2019)
Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
Citizen Engagement for Transparent and Accountable Policy Modelling. MEDES (2019)
Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
Improving Collaborative Filtering's Rating Prediction Quality by Exploiting the Item Adoption Eagerness Information. WI (2019)
Ioanna Lykourentzou, Antonios Liapis, Costas Papastathis, Konstantinos Papangelis, Costas Vassilakis
Exploring Self-organisation in Crowd Teams. I3E Workshops (2019)
Costas Vassilakis, Dionisis Margaris
Editorial for the Special Issue on "Modern Recommender Systems: Approaches, Challenges and Applications". Inf. 10 (7) (2019)
Dionisis Margaris, Dionysios Vasilopoulos, Costas Vassilakis, Dimitris Spiliotopoulos
Improving Collaborative Filtering's Rating Prediction Accuracy by Introducing the Common Item Rating Past Criterion. IISA (2019)
Costas Vassilakis, Vassilis Poulopoulos, Manolis Wallace, Angeliki Antoniou, George Lepouras
TripMentor Project: Scope and Challenges. CI@SMAP (2019)
Anastasios Theodoropoulos, Costas Vassilakis, Angeliki Antoniou, Manolis Wallace, George Lepouras
ATMF: A Student-Centered Framework for the Effective Implementation of Alternative Teaching Methods for CSEd. I3E Workshops (2019)
Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
Social relations versus near neighbours: reliable recommenders in limited information social network collaborative filtering for online advertising. ASONAM (2019)
Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis, Volha Petukhova, Konstantinos Kotis
A Mixed-reality Interaction-driven Game-based Learning Framework. MEDES (2019)
Vassilis Poulopoulos, Manolis Wallace, Costas Vassilakis, George Lepouras
PaloAnalytics Project Concept, Scope and Outcomes: An Opportunity for Culture. CI@SMAP (2019)
Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris, Konstantinos Kotis
A Methodology for Generated Text Annotation for High Quality Speech Synthesis. IISA (2019)
Angeliki Antoniou, Susana Maria Reboreda-Morillo, George Lepouras, Jason Diakoumakos, Costas Vassilakis, Martín López Nores, Catherine Emma Jones
Bringing a peripheral, traditional venue to the digital era with targeted narratives. Digit. Appl. Archaeol. Cult. Heritage 14 (2019)
Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
Data-driven country safety monitoring terrorist attack prediction. ASONAM (2019)
Dionisis Margaris, Dionysios Vasilopoulos, Costas Vassilakis, Dimitris Spiliotopoulos
Improving Collaborative Filtering's Rating Prediction Coverage in Sparse Datasets through the Introduction of Virtual Near Neighbors. IISA (2019)
Nicholas Kolokotronis, Sotirios Brotsis, Georgios Germanos, Costas Vassilakis, Stavros Shiaeles
On Blockchain Architectures for Trust-Based Collaborative Intrusion Detection. SERVICES (2019)
Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
Query personalization using social network information and collaborative filtering techniques. Future Gener. Comput. Syst. 78 (2018)
Dionisis Margaris, Costas Vassilakis
Improving Collaborative Filtering's Rating Prediction Coverage in Sparse Datasets by Exploiting User Dissimilarity. DASC/PiCom/DataCom/CyberSciTech (2018)
Angeliki Antoniou, Costas Vassilakis, Anastasios Theodoropoulos, George Lepouras
The Human Computer Interaction and Virtual Reality Lab (University of Peloponnese): Overview and Current Challenges. CIRA@EuroMed (2018)
Vassilis Poulopoulos, Costas Vassilakis, Angela Antoniou, Manolis Wallace, George Lepouras, Martín López Nores
ExhiSTORY: IoT in the service of Cultural Heritage. GIIS (2018)
Vassilis Poulopoulos, Costas Vassilakis, Manolis Wallace, Angela Antoniou, George Lepouras
The Effect of Social Media Trending Topics Related to Cultural Venues' Content. SMAP (2018)
Dionisis Margaris, Costas Vassilakis
Improving Collaborative Filtering's Rating Prediction Accuracy by Considering Users' Rating Variability. DASC/PiCom/DataCom/CyberSciTech (2018)
Christos M. Mathas, Olga E. Segou, Georgios Xilouris, Dimitris Christinakis, Michail-Alexandros Kourtis, Costas Vassilakis, Anastasios Kourtis
Evaluation of Apache Spot's machine learning capabilities in an SDN/NFV enabled environment. ARES (2018)
Dionisis Margaris, Costas Vassilakis
Enhancing Rating Prediction Quality Through Improving the Accuracy of Detection of Shifts in Rating Practices. Trans. Large Scale Data Knowl. Centered Syst. 37 (2018)
Vassilis Poulopoulos, Costas Vassilakis, Angela Antoniou, George Lepouras, Manolis Wallace
Personality Analysis of Social Media Influencers as a Tool for Cultural Institutions. EuroMed (1) (2018)
Costas Vassilakis, Vassilis Poulopoulos, Angeliki Antoniou, Manolis Wallace, George Lepouras, Martín López Nores
exhiSTORY: Smart exhibits that tell their own stories. Future Gener. Comput. Syst. 81 (2018)
Dionisis Margaris, Costas Vassilakis
Exploiting Rating Abstention Intervals for Addressing Concept Drift in Social Network Recommender Systems. Informatics 5 (2) (2018)
Costas Vassilakis, Angeliki Antoniou, George Lepouras, Vassilis Poulopoulos, Manolis Wallace, Stavroula Bampatzia, Ioannis Bourlakos
Stimulation of reflection and discussion in museum visits through the use of social media. Soc. Netw. Anal. Min. 7 (1) (2017)
Dionisis Margaris, Costas Vassilakis
Exploiting Internet of Things information to enhance venues' recommendation accuracy. Serv. Oriented Comput. Appl. 11 (4) (2017)
Spyros Boukoros, Anupiya Nugaliyadde, Angelos K. Marnerides, Costas Vassilakis, Polychronis Koutsakis, Kok Wai Wong
Modeling Server Workloads for Campus Email Traffic Using Recurrent Neural Networks. ICONIP (5) (2017)
Marinos Theodorakopoulos, Nikos Papageorgopoulos, Andriana Mourti, Angeliki Antoniou, Manolis Wallace, George Lepouras, Costas Vassilakis, Nikos Platis
Personalized augmented reality experiences in museums using Google Cardboards. SMAP (2017)
Dionisis Margaris, Costas Vassilakis
Improving collaborative filtering's rating prediction quality in dense datasets, by pruning old ratings. ISCC (2017)
Dionisis Margaris, Costas Vassilakis
Using Time Clusters for Following Users' Shifts in Rating Practices. Complex Syst. Informatics Model. Q. 13 (2017)
Dionisis Margaris, Costas Vassilakis
Enhancing User Rating Database Consistency Through Pruning. Trans. Large Scale Data Knowl. Centered Syst. 34 (2017)
Dionisis Margaris, Costas Vassilakis
Improving Collaborative Filtering's Rating Prediction Quality by Considering Shifts in Rating Practices. CBI (1) (2017)
Ioannis Bourlakos, Manolis Wallace, Angeliki Antoniou, Costas Vassilakis, George Lepouras, Anna Vassiliki Karapanagiotou
Formalization and Visualization of the Narrative for Museum Guides. International KEYSTONE Conference (2017)
Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
Improving QoS delivered by WS-BPEL scenario adaptation through service execution parallelization. SAC (2016)
Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
Recommendation information diffusion in social networks considering user influence and semantics. Soc. Netw. Anal. Min. 6 (1) (2016)
Stavroula Bampatzia, Angeliki Antoniou, George Lepouras, Costas Vassilakis, Manolis Wallace
Using social media to stimulate history reflection in cultural heritage. SMAP (2016)
Stavroula Bampatzia, Omar Gustavo Bravo-Quezada, Angeliki Antoniou, Martín López Nores, Manolis Wallace, George Lepouras, Costas Vassilakis
The Use of Semantics in the CrossCult H2020 Project. International KEYSTONE Conference (2016)
Costas Vassilakis, Angeliki Antoniou, George Lepouras, Manolis Wallace, Ioanna Lykourentzou, Yannick Naudet
Interconnecting Objects, Visitors, Sites and (Hi)Stories Across Cultural and Historical Concepts: The CrossCult Project. EuroMed (1) (2016)
Dionisis Margaris, Costas Vassilakis
Pruning and aging for user histories in collaborative filtering. SSCI (2016)
Stavroula Bampatzia, Ioannis Bourlakos, Angeliki Antoniou, Costas Vassilakis, George Lepouras, Manolis Wallace
Serious Games: Valuable Tools for Cultural Heritage. GALA (2016)
Dionisis Margaris, Panagiotis Georgiadis, Costas Vassilakis
A collaborative filtering algorithm with clustering for personalized web service selection in business processes. RCIS (2015)
Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
An integrated framework for adapting WS-BPEL scenario execution using QoS and collaborative filtering techniques. Sci. Comput. Program. 98 (2015)
Dionisis Margaris, Panagiotis Georgiadis, Costas Vassilakis
On Replacement Service Selection in WS-BPEL Scenario Adaptation. SOCA (2015)
Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
A hybrid framework for WS-BPEL scenario execution adaptation, using monitoring and feedback data. SAC (2015)
Akrivi Katifori, Costas Vassilakis, George Lepouras, Elena Torou
Effectiveness of Visualization for Information Retrieval through Ontologies with Entity Evolution: The Impact of Ontology Modeling. Int. J. Inf. Retr. Res. 5 (2) (2015)
Jenny Rompa, Christos Tryfonopoulos, Costas Vassilakis, George Lepouras
Mindmap-Inspired Semantic Personal Information Management. EDBT (2014)
George Lepouras, Akrivi Katifori, Costas Vassilakis, Angeliki Antoniou, Nikos Platis
Towards a learning analytics platform for supporting the educational process. IISA (2014)
Akrivi Katifori, Costas Vassilakis, George Lepouras, Elena Torou, Constantin Halatsis
Visualization Method Effectiveness in Ontology-Based Information Retrieval Tasks Involving Entity Evolution. SMAP (2014)

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Publication Activity (10 Years)

Top Topics

Top Venues

Costas Vassilakis