Dionisis Margaris

76 papers B 9C 6Misc 3Journal 37Unranked 21

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	A Large-Scale Empirical Study of LLM Orchestration and Ensemble Strategies for Sentiment Analysis in Recommender Systems. Future Internet Konstantinos I. Roumeliotis, Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2026	J	`jnl`	Optimizing Collaborative Filtering for Accurate Rating Predictions in Very Sparse Datasets. Future Internet Sofia-Anna Lapadaki, John Nanos, Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
2025	J	`jnl`	AI and Related Technologies in the Fields of Smart Agriculture: A Review. Inf. Fotis Assimakopoulos, Costas Vassilakis, Dionisis Margaris, Konstantinos Kotis, Dimitris Spiliotopoulos
2025	J	`jnl`	An evaluation review of user similarity metrics in sparse collaborative filtering datasets. Int. J. Data Sci. Anal. Kiriakos Sgardelis, Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2025	J	`jnl`	From Rating Predictions to Reliable Recommendations in Collaborative Filtering: The Concept of Recommendation Reliability Classes. Big Data Cogn. Comput. Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
2024	J	`jnl`	Exploiting Rating Prediction Certainty for Recommendation Formulation in Collaborative Filtering. Big Data Cogn. Comput. Dionisis Margaris, Kiriakos Sgardelis, Dimitris Spiliotopoulos, Costas Vassilakis
2024	C	`conf`	Improving Recommendation Quality in Collaborative Filtering by Including Prediction Confidence Factors. WEBIST Kiriakos Sgardelis, Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis, Stefanos Ougiaroglou
2024	—	`conf`	Predicting Agricultural Product and Supplies Prices Using Artificial Intelligence. KMIS Ioannis Dionissopoulos, Fotis Assimakopoulos, Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
2024	J	`jnl`	The Implementation of "Smart" Technologies in the Agricultural Sector: A Review. Inf. Fotis Assimakopoulos, Costas Vassilakis, Dionisis Margaris, Konstantinos Kotis, Dimitris Spiliotopoulos
2023	C	`conf`	A User Interface for Tuning QoS Parameters in Recommendation-Based Business Process Scenario Adaptation. WEBIST Kiriakos Sgardelis, Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2023	—	`conf`	A Web Tool for K-means Clustering. NiDS (1) Konstantinos Gratsos, Stefanos Ougiaroglou, Dionisis Margaris
2023	J	`jnl`	Chatbots for Cultural Venues: A Topic-Based Approach. Algorithms Vasilis Bouras, Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis, Konstantinos Kotis, Angeliki Antoniou, George Lepouras, Manolis Wallace, Vassilis Poulopoulos
2023	J	`jnl`	Disruptive Technologies for Parliaments: A Literature Review. Future Internet Dimitris Koryzis, Dionisis Margaris, Costas Vassilakis, Konstantinos Kotis, Dimitris Spiliotopoulos
2023	J	`jnl`	Improving collaborative filtering's rating prediction accuracy by introducing the experiencing period criterion. Neural Comput. Appl. Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis, Dionysios Vasilopoulos
2023	J	`jnl`	Rating Prediction Quality Enhancement in Low-Density Collaborative Filtering Datasets. Big Data Cogn. Comput. Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos, Stefanos Ougiaroglou
2023	J	`jnl`	kClusterHub: An AutoML-Driven Tool for Effortless Partition-Based Clustering over Varied Data Types. Future Internet Konstantinos Gratsos, Stefanos Ougiaroglou, Dionisis Margaris
2022	—	`conf`	A Quality of Experience Illustrator User Interface for Cloud Provider Recommendations. HCI (37) Panagiotis C. Kokkinos, Dionisis Margaris, Dimitris Spiliotopoulos
2022	—	`conf`	Anchoring Effect Mitigation for Complex Recommender System Design. HCI (41) Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2022	J	`jnl`	Fast Training Set Size Reduction Using Simple Space Partitioning Algorithms. Inf. Stefanos Ougiaroglou, Theodoros Mastromanolis, Georgios Evangelidis, Dionisis Margaris
2022	J	`jnl`	On Exploiting Rating Prediction Accuracy Features in Dense Collaborative Filtering Datasets. Inf. Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
2022	J	`jnl`	On Producing Accurate Rating Predictions in Sparse Collaborative Filtering Datasets. Inf. Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
2022	—	`conf`	Persona Finetuning for Online Gaming Using Personalisation Techniques. HCI (42) Dimitris Spiliotopoulos, Dionisis Margaris, Kostas N. Koutrakis, Panos I. Philippopoulos, Costas Vassilakis
2021	—	`conf`	A User Interface for Personalising WS-BPEL Scenarios. HCI (22) Dionisis Margaris, Dimitris Spiliotopoulos, Dionysios Vasilopoulos, Costas Vassilakis
2021	—	`conf`	An Interface for User-Centred Process and Correlation Between Large Datasets. HCI (18) Dimitris Spiliotopoulos, Tauheodoros Giannakopoulos, Costas Vassilakis, Manolis Wallace, Marina Lantzouni, Vassilis Poulopoulos, Dionisis Margaris
2021	J	`jnl`	On Addressing the Low Rating Prediction Coverage in Sparse Datasets Using Virtual Ratings. SN Comput. Sci. Dionisis Margaris, Dimitris Spiliotopoulos, Gregory Karagiorgos, Costas Vassilakis, Dionysios Vasilopoulos
2021	B	`conf`	Trust- and Rating- based Recommendations for On-line Social Networks. ICCCN Anna Kobusinska, Dionisis Margaris, Jakub Peikert
2020	—	`conf`	"Talking" Triples to Museum Chatbots. HCI (35) Savvas Varitimiadis, Konstantinos Kotis, Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
2020	J	`jnl`	A Semantic Mixed Reality Framework for Shared Cultural Experiences Ecosystems. Big Data Cogn. Comput. 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
2020	—	`conf`	A User Interface for Personalized Web Service Selection in Business Processes. HCI (45) Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis, Gregory Karagiorgos
2020	J	`jnl`	A fine-grained social network recommender system. Soc. Netw. Anal. Min. Markos Aivazoglou, Antonios O. Roussos, Dionisis Margaris, Costas Vassilakis, Sotiris Ioannidis, Jason Polakis, Dimitris Spiliotopoulos
2020	J	`jnl`	An Adaptive Social Network-Aware Collaborative Filtering Algorithm for Improved Rating Prediction Accuracy. IEEE Access Dionisis Margaris, Anna Kobusinska, Dimitris Spiliotopoulos, Costas Vassilakis
2020	J	`jnl`	An Algorithm for Density Enrichment of Sparse Collaborative Filtering Datasets Using Robust Predictions as Derived Ratings. Algorithms Dionisis Margaris, Dimitris Spiliotopoulos, Gregory Karagiorgos, Costas Vassilakis
2020	J	`jnl`	An integer programming-based algorithm for optimising the WS-BPEL scenario execution adaptation process. Int. J. Web Eng. Technol. Dionisis Margaris, Dimitris Spiliotopoulos, Apostolos Kardiasmenos, Dimitrios Pantazopoulos
2020	J	`jnl`	Data-Assisted Persona Construction Using Social Media Data. Big Data Cogn. Comput. Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
2020	B	`conf`	Database Knowledge Enrichment Utilizing Trending Topics from Twitter. ASONAM Costas Vassilakis, Dimitra Maniataki, George Lepouras, Angeliki Antoniou, Dimitris Spiliotopoulos, Vassilis Poulopoulos, Manolis Wallace, Dionisis Margaris
2020	J	`jnl`	Human behaviour in multimodal interaction: main effects of civic action and interpersonal and problem-solving skills. J. Ambient Intell. Humaniz. Comput. Eleni Makri, Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
2020	J	`jnl`	Improving collaborative filtering's rating prediction accuracy by considering users' dynamic rating variability. Int. J. Big Data Intell. Dionisis Margaris, Costas Vassilakis
2020	J	`jnl`	Improving collaborative filtering's rating prediction coverage in sparse datasets by exploiting the 'friend of a friend' concept. Int. J. Big Data Intell. Dionisis Margaris, Costas Vassilakis
2020	—	`conf`	MOOC Accessibility from the Educator Perspective. HCI (44) Dimitris Spiliotopoulos, Vassilis Poulopoulos, Dionisis Margaris, Eleni Makri, Costas Vassilakis
2020	J	`jnl`	Multimodal Interaction: Correlates of Learners' Metacognitive Skill Training Negotiation Experience. Inf. Dimitris Spiliotopoulos, Eleni Makri, Costas Vassilakis, Dionisis Margaris
2020	B	`conf`	Neighbourhood Aging Factors for Limited Information Social Network Collaborative Filtering. ASONAM Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2020	B	`conf`	On Recommending Safe Travel Periods to High Attack Risk Destinations. ASONAM Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
2020	—	`conf`	Policy Making Analysis and Practitioner User Experience. HCI (41) Dimitris Koryzis, Fotios Fitsilis, Dimitris Spiliotopoulos, Theocharis Theocharopoulos, Dionisis Margaris, Costas Vassilakis
2020	—	`conf`	Semantics-Driven Conversational Interfaces for Museum Chatbots. HCI (35) Dimitris Spiliotopoulos, Konstantinos Kotis, Costas Vassilakis, Dionisis Margaris
2020	J	`jnl`	What makes a review a reliable rating in recommender systems? Inf. Process. Manag. Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
2019	—	`conf`	A Methodology for Generated Text Annotation for High Quality Speech Synthesis. IISA Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris, Konstantinos Kotis
2019	C	`conf`	A Mixed-reality Interaction-driven Game-based Learning Framework. MEDES Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis, Volha Petukhova, Konstantinos Kotis
2019	C	`conf`	Citizen Engagement for Transparent and Accountable Policy Modelling. MEDES Dimitris Spiliotopoulos, Dionisis Margaris, Costas Vassilakis
2019	B	`conf`	Data-driven country safety monitoring terrorist attack prediction. ASONAM Dimitris Spiliotopoulos, Costas Vassilakis, Dionisis Margaris
2019	J	`jnl`	Editorial for the Special Issue on "Modern Recommender Systems: Approaches, Challenges and Applications". Inf. Costas Vassilakis, Dionisis Margaris
2019	—	`conf`	Exploiting Recommender Service to Enhance Efficiency of Replication. SOCA Anna Kobusinska, Michal Boron, Aleksandra Kerebinska, Dionisis Margaris
2019	J	`jnl`	Handling uncertainty in social media textual information for improving venue recommendation formulation quality in social networks. Soc. Netw. Anal. Min. Dionisis Margaris, Costas Vassilakis, Dimitris Spiliotopoulos
2019	—	`conf`	Improving Collaborative Filtering's Rating Prediction Accuracy by Introducing the Common Item Rating Past Criterion. IISA Dionisis Margaris, Dionysios Vasilopoulos, Costas Vassilakis, Dimitris Spiliotopoulos
2019	—	`conf`	Improving Collaborative Filtering's Rating Prediction Coverage in Sparse Datasets through the Introduction of Virtual Near Neighbors. IISA Dionisis Margaris, Dionysios Vasilopoulos, Costas Vassilakis, Dimitris Spiliotopoulos
2019	B	`conf`	Improving Collaborative Filtering's Rating Prediction Quality by Exploiting the Item Adoption Eagerness Information. WI Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2019	B	`conf`	Social relations versus near neighbours: reliable recommenders in limited information social network collaborative filtering for online advertising. ASONAM Dionisis Margaris, Dimitris Spiliotopoulos, Costas Vassilakis
2018	J	`jnl`	Enhancing Rating Prediction Quality Through Improving the Accuracy of Detection of Shifts in Rating Practices. Trans. Large Scale Data Knowl. Centered Syst. Dionisis Margaris, Costas Vassilakis
2018	J	`jnl`	Exploiting Rating Abstention Intervals for Addressing Concept Drift in Social Network Recommender Systems. Informatics Dionisis Margaris, Costas Vassilakis
2018	—	`conf`	Improving Collaborative Filtering's Rating Prediction Accuracy by Considering Users' Rating Variability. DASC/PiCom/DataCom/CyberSciTech Dionisis Margaris, Costas Vassilakis
2018	—	`conf`	Improving Collaborative Filtering's Rating Prediction Coverage in Sparse Datasets by Exploiting User Dissimilarity. DASC/PiCom/DataCom/CyberSciTech Dionisis Margaris, Costas Vassilakis
2018	J	`jnl`	Query personalization using social network information and collaborative filtering techniques. Future Gener. Comput. Syst. Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
2017	J	`jnl`	Enhancing User Rating Database Consistency Through Pruning. Trans. Large Scale Data Knowl. Centered Syst. Dionisis Margaris, Costas Vassilakis
2017	J	`jnl`	Exploiting Internet of Things information to enhance venues' recommendation accuracy. Serv. Oriented Comput. Appl. Dionisis Margaris, Costas Vassilakis
2017	—	`conf`	Improving Collaborative Filtering's Rating Prediction Quality by Considering Shifts in Rating Practices. CBI (1) Dionisis Margaris, Costas Vassilakis
2017	C	`conf`	Improving collaborative filtering's rating prediction quality in dense datasets, by pruning old ratings. ISCC Dionisis Margaris, Costas Vassilakis
2017	J	`jnl`	Using Time Clusters for Following Users' Shifts in Rating Practices. Complex Syst. Informatics Model. Q. Dionisis Margaris, Costas Vassilakis
2016	Misc	`conf`	Improving QoS delivered by WS-BPEL scenario adaptation through service execution parallelization. SAC Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
2016	—	`conf`	Pruning and aging for user histories in collaborative filtering. SSCI Dionisis Margaris, Costas Vassilakis
2016	J	`jnl`	Recommendation information diffusion in social networks considering user influence and semantics. Soc. Netw. Anal. Min. Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
2015	B	`conf`	A collaborative filtering algorithm with clustering for personalized web service selection in business processes. RCIS Dionisis Margaris, Panagiotis Georgiadis, Costas Vassilakis
2015	Misc	`conf`	A hybrid framework for WS-BPEL scenario execution adaptation, using monitoring and feedback data. SAC Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
2015	J	`jnl`	An integrated framework for adapting WS-BPEL scenario execution using QoS and collaborative filtering techniques. Sci. Comput. Program. Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
2015	—	`conf`	On Replacement Service Selection in WS-BPEL Scenario Adaptation. SOCA Dionisis Margaris, Panagiotis Georgiadis, Costas Vassilakis
2013	B	`conf`	Adapting WS-BPEL scenario execution using collaborative filtering techniques. RCIS Dionisis Margaris, Panagiotis Georgiadis, Costas Vassilakis
2013	Misc	`conf`	An integrated framework for QoS-based adaptation and exception resolution in WS-BPEL scenarios. SAC Dionisis Margaris, Costas Vassilakis, Panagiotis Georgiadis
2010	C	`conf`	SBST for on-line detection of hard faults in multiprocessor applications under energy constraints. IOLTS Andreas Merentitis, Dionisis Margaris, Nektarios Kranitis, Antonis M. Paschalis, Dimitris Gizopoulos