VLDB 2026 Research / reviewers in the wild / expert
Akrivi Krouska
dblp:192/0732
· DBLP profile ↗
21ranked-venue papers
5as first author
16since 2021 · last 2025
0000-0002-8620-5255ORCID · verified
Domains — the database's venue-derived domains; a paper can count in several
Human-computer interaction and ubiquitous computing · 11 · 3 first-author · 9 since 2021Applied, interdisciplinary, general and emerging computing · 10 · 1 first-author · 8 since 2021Artificial intelligence and machine learning · 5 · 1 first-author · 2 since 2021Software engineering, systems software and programming languages · 1 · 1 first-author · 1 since 2021Graphics, computer vision, multimedia, augmented reality and games · 1 · 1 since 2021
| Year | Publication | Venue | Position |
|---|---|---|---|
| 2025 | Fuzzy-Weighted Sentiment Recognition for Educational Text-Based Interactions
Christos Troussas, Christos Papakostas, Akrivi Krouska, Phivos Mylonas |
WEBIST | 3 |
| 2025 | Fuzzy-Based Virtual Reality System for Cultural Heritage: Enhancing User Interaction and Experience Through Contextual Assistive MessagingabstractThe article highlights the need for enhanced user interaction and personalization in virtual reality (VR) systems for cultural heritage. As cultural sites become accessible through VR, delivering meaningful and tailored user experiences is crucial for effective learning and engagement. Traditional VR systems often fail to address varying levels of user expertise, limiting the accessibility of cultural content. To solve this, the study introduces SculptMate, a fuzzy logic-based VR system that estimates user proficiency in computers and VR, delivering context-sensitive assistive messages. In a study with 64 participants, SculptMate was compared to a standard VR system. Results demonstrated significantly higher engagement and comprehension of cultural artifacts with SculptMate, offering a personalized, immersive experience. The study emphasizes the potential of integrating fuzzy logic into VR to improve educational outcomes and user satisfaction. Future enhancements include dynamic machine learning, multisensory components, and platform optimization for broader accessibility and better user experiences. Christos Troussas, Christos Papakostas, Akrivi Krouska, Phivos Mylonas, Cleo Sgouropoulou |
Int. J. Hum. Comput. Interact. | 3 |
| 2024 | Analysing the Effectiveness of a Social Digital Repository for Learning and Teaching: A Fuzzy Comprehensive Evaluation
Akrivi Krouska, Christos Troussas, Phivos Mylonas, Cleo Sgouropoulou |
ENASE | 1 |
| 2024 | A Rule-Based Chatbot Offering Personalized Guidance in Computer Programming Education
Christos Papakostas, Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou |
ITS (2) | 3 |
| 2024 | FASTER-AI: A Comprehensive Framework for Enhancing the Trustworthiness of Artificial Intelligence in Web Information Systems
Christos Troussas, Christos Papakostas, Akrivi Krouska, Phivos Mylonas, Cleo Sgouropoulou |
WEBIST | 3 |
| 2024 | An Empirical Investigation of User Acceptance of Personalized Mobile Software for Sustainability EducationabstractEducation for sustainability refers to educational policies that focus on shaping a sustainable future. Mobile learning software refers to the use of mobile applications through smart devices for promoting online learning. However, the effectiveness of such software in learning for sustainability depends on users’ intention to adopt it. While there is growing interest in using mobile technology for sustainability education, empirical evidence on how personalized mobile software can influence users’ attitudes and behaviors toward sustainable practices is limited. Thus, this study investigates the factors that affect users’ acceptance of mobile learning technology in sustainability education, by integrating environmental awareness and personalization strategies into a modified model based on the unified theory of acceptance and use of technology (UTAUT). A total of 120 users participated in the survey. An empirical analysis of data was conducted using Partial Least Squares Structural Equation Modeling (PLS-SEM) to test the relationship between the variables of the model. The results showed that both environmental awareness and personalization strategies had a significant effect on users’ behavioral intentions. In addition, hedonic motivation and habit exerted an effect on behavioral intention, contrary to effort expectancy and social influence. These findings confirm that a personalized mobile learning application related to environmental issues reveals as a powerful tool for supporting environmental education since such software appears to have high acceptance by the user. The significance of the study lies in its potential to inform the design and development of personalized mobile applications for sustainability education. The study contributes to the creation of more effective mobile applications that promote sustainable behavior and contribute to a more sustainable future by identifying the elements that influence user acceptance. Akrivi Krouska, Christos Troussas, Katerina Kabassi, Cleo Sgouropoulou |
Int. J. Hum. Comput. Interact. | 1 |
| 2024 | How personalized and effective is immersive virtual reality in education? A systematic literature review for the last decadeabstractAbstract During the last decade, there has been a substantial increase of interest in studies related to Virtual Reality (VR) as a learning tool. This paper presents a systematic literature review of personalization strategies utilized in immersive VR for educational objectives in the classroom. For the purposes of this review, 69 studies between 2012 and 2022 were analyzed in terms of their benefits, limitations and development features. The novelty of the study mainly arises from the in-depth analysis and reporting of personalization strategies as well as gamification techniques used in VR applications. The significance of this research lies in the observation that earlier studies’ applications did not sufficiently incorporate adaptive learning content, indicating the necessity for more research in this field and revealing a research gap. In conclusion, as it encourages future research of this field, this study may be a beneficial reference for those interested in researching the implementation of Virtual Reality in education, including academics, students, and professionals. Andreas Marougkas, Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou |
Multim. Tools Appl. | 3 |
| 2023 | Personalized Feedback Enhanced by Natural Language Processing in Intelligent Tutoring Systems
Christos Troussas, Christos Papakostas, Akrivi Krouska, Phivos Mylonas, Cleo Sgouropoulou |
ITS | 3 |
| 2023 | Exploring Users' Behavioral Intention to Adopt Mobile Augmented Reality in Education through an Extended Technology Acceptance ModelabstractDigitalization in education is of great importance, especially in era of COVID-19 pandemic. Augmented Reality can help to this direction, bringing a range of benefits in the field of education. Prior researches reveal that AR enhances the students’ learning outcomes offering significant pedagogical affordance when it is used in the tutoring of different domains, such as astronomy, biology, geometry, physics etc. However, the exploration of the factors associated with the acceptance of the technology of AR in education, is yet limited. This article aims to present valuable information to researchers, tutors and AR application developers concerning the learners’ behavioral intention to use such technology in the learning process. The motivation of this study is the increasing use of AR in education, offering significant room for future research, and its novelty is the analysis of the most significant factors affecting the actual AR system use. This study is based on a modified Technology Acceptance Model, consisting of the four core constructs and extended by two external variables, namely playfulness and quality output, in order to consider both pedagogy and technology. The population that participated in this research includes 220 secondary school students. The results show that the intention to use AR is positively influenced directly by quality output, perceived usefulness and perceived ease of use, and indirectly by playfulness. The findings help AR developers to understand the factors that maximize the user’s experience prior to the application of AR technology in the digital era of education. Christos Papakostas, Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou |
Int. J. Hum. Comput. Interact. | 3 |
| 2023 | A multilayer inference engine for individualized tutoring model: adapting learning material and its granularity
Christos Troussas, Akrivi Krouska, Maria Virvou |
Neural Comput. Appl. | 2 |
| 2023 | A novel group recommender system for domain-independent decision support customizing a grouping genetic algorithmabstractAbstract Group formation is a complex task requiring computational support to succeed. In the literature, there has been considerable effort in the development of algorithms for composing groups as well as their evaluation. The most widely used approach is the Genetic Algorithm, as, it can handle numerous variables, generating optimal solutions according to the problem requirements. In this study, a novel genetic algorithm was developed for forming groups using innovative genetic operators, such as a modification of 1-point and 2-point crossover, the gene and the group crossover, to improve its performance and accuracy. Moreover, the proposed algorithm can be characterized as domain-independent, as it allows any input regardless of the domain problem; i.e., whether the groups concern objects, items or people, or whether the field of application is industry, education, healthcare, etc. The grouping genetic algorithm has been evaluated using a dataset from the literature in terms of its settings, showing that the tournament selection is better to be chosen when a quick solution is required, while the introduced gene and group crossover operators are superior to the classic ones. Furthermore, the combination of up to three crossover operators is ideal solution concerning algorithm’s accuracy and execution time. The effectiveness of the algorithm was tested in two grouping cases based on its acceptability. Both the students participated in forming collaborative groups and the professors participated in evaluating the groups of courses created were highly satisfied with the results. The contribution of this research is that it can help the stakeholders achieve an effective grouping using the presented genetic algorithm. In essence, they have the flexibility to execute the genetic algorithm in different contexts as many times as they want until to succeed the preferred output by choosing the number of operators for either greater accuracy or reduced execution time. Akrivi Krouska, Christos Troussas, Cleo Sgouropoulou |
User Model. User Adapt. Interact. | 1 |
| 2022 | Double-Layer Controller for Detecting Learners' Erroneous Knowledge in Database Programming
Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou |
ITS | 2 |
| 2022 | A 2-tier fuzzy control system for grade adjustment based on students' social interactions
Akrivi Krouska, Christos Troussas, Athanasios Voulodimos, Cleo Sgouropoulou |
Expert Syst. Appl. | 1 |
| 2021 | XGBoost and Deep Neural Network Comparison: The Case of Teams' Performance
Filippos Giannakas, Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou, Ioannis Voyiatzis |
ITS | 3 |
| 2021 | Representation of Generalized Human Cognitive Abilities in a Sophisticated Student Leaderboard
Christos Troussas, Akrivi Krouska, Filippos Giannakas, Cleo Sgouropoulou, Ioannis Voyiatzis |
ITS | 2 |
| 2021 | A User-centric System for Improving Human-Computer Interaction through Fuzzy Logic-based Assistive Messages
Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou |
WEBIST | 2 |
| 2020 | Applying Genetic Algorithms for Recommending Adequate Competitors in Mobile Game-Based Learning Environments
Akrivi Krouska, Christos Troussas, Cleo Sgouropoulou |
ITS | 1 |
| 2020 | Dynamic Detection of Learning Modalities Using Fuzzy Logic in Students' Interaction Activities
Christos Troussas, Akrivi Krouska, Cleo Sgouropoulou |
ITS | 2 |
| 2018 | Multi-Algorithmic Techniques and a Hybrid Model for Increasing the Efficiency of Recommender SystemsabstractThe explosive growth in the amount of available digital information has increased the demand for recommender systems. Recommender systems are information filtering systems that deal with the problem of information overload by filtering vital information fragment out of large amount of dynamically generated information according to user's preferences or interests. Recommender systems have the ability to predict whether a particular user would prefer an item or not based on his/her personal profile. To this direction, this paper presents multi-algorithmic techniques, such as content-based filtering and collaborative filtering, which increase the efficiency of recommender systems. Moreover, a hybrid model for recommendation, employing content-based and collaborative filtering, is introduced. The presented recommender system takes as input information about users from their profile in Facebook, one of the most well-known social networking services. Examples of operation are given and they hold promising results for the described techniques. Finally, the paper attests that the aforementioned techniques can be used for different kind of software, such as e-learning, e-commerce, etc. Christos Troussas, Akrivi Krouska, Maria Virvou |
ICTAI | 2 |
| 2017 | Automatic Predictions Using LDA for Learning through Social Networking ServicesabstractSocial Networking Services can serve as a great platform for learning. As such, the use of Facebook in learning contexts can be proved beneficial. Following this direction, this paper presents a prototype Facebook application for learning which is supported by Latent Dirichlet allocation (LDA). LDA is a generative model that allows sets of observations to be explained by unobserved groups that clarify why some parts of the data are similar. Hence, making automatic predictions about the interests of students can be made by collecting their preferences and characteristics. Hence, by tracking user interests, accurate recommendations can be made. The experimental results, presented in this paper, reinforce the view that automatic predictions using LDA to students in social networks can be a powerful idea in personalizing instruction. Christos Troussas, Akrivi Krouska, Maria Virvou |
ICTAI | 2 |
| 2017 | Integrating an Adjusted Conversational Agent into a Mobile-Assisted Language Learning ApplicationabstractConversational interfaces are used for a variety of applications. They are constructed to offer useful services and to interact with the users in order to assist them. Towards this direction, the current paper presents the incorporation of the interactive chatterbot ALICE in a mobile-assisted English language learning application. This chatterbot is further enriched with mechanisms in order to support students while learning vocabulary in English. As such, apart from making conversation with this conversational agent, they can practice their vocabulary or even be evaluated by the chatterbot. Hence, this study offers a fertile ground to enhance pedagogical results such as fostering motivation and engagement, incrementing crucial language learning and assisting in the acquisition of cognitive skills. Finally, the students can chat with the pedagogic conversational agent either orally or by writing. Christos Troussas, Akrivi Krouska, Maria Virvou |
ICTAI | 2 |