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A guideline-based approach for assisting with the reproducibility of experiments in recommender systems evaluation (2019)
Journal Article
Polatidis, N., Pimenidis, E., Fish, A., & Kapetanakis, S. (2019). A guideline-based approach for assisting with the reproducibility of experiments in recommender systems evaluation. International Journal on Artificial Intelligence Tools, 28(8), https://doi.org/10.1142/S021821301960011X

Recommender systems’ evaluation is usually based on predictive accuracy and information retrieval metrics, with better scores meaning recommendations are of higher quality. However, new algorithms are constantly developed and the comparison of result... Read More about A guideline-based approach for assisting with the reproducibility of experiments in recommender systems evaluation.

A switching multi-level method for the long tail recommendation problem (2019)
Journal Article
Alshammari, G., Jorro-Aragoneses, J. L., Polatidis, N., Kapetanakis, S., Pimenidis, E., & Petridis, M. (2019). A switching multi-level method for the long tail recommendation problem. Journal of Intelligent and Fuzzy Systems, 37(6), 7189-7198. https://doi.org/10.3233/JIFS-179331

© 2019 - IOS Press and the authors. All rights reserved. Recommender systems are decision support systems that play an important part in generating a list of product or service recommendations for users based on the past experiences and interactions.... Read More about A switching multi-level method for the long tail recommendation problem.

An explanation-based approach for experiment reproducibility in recommender systems (2019)
Journal Article
Polatidis, N., Papaleonidas, A., Pimenidis, E., & Iliadis, L. (in press). An explanation-based approach for experiment reproducibility in recommender systems. Neural Computing and Applications, https://doi.org/10.1007/s00521-019-04274-x

© 2019, Springer-Verlag London Ltd., part of Springer Nature. The offline evaluation of recommender systems is typically based on accuracy metrics such as the Mean Absolute Error and the Root Mean Squared Error for error rating prediction and Precisi... Read More about An explanation-based approach for experiment reproducibility in recommender systems.

Secure Social Media Spaces for Communities of Vulnerable People (2019)
Conference Proceeding
Pimenidis, E., & Polatidis, N. (2019). Secure Social Media Spaces for Communities of Vulnerable People. https://doi.org/10.1109/ICGS3.2019.8688027

© 2019 IEEE. This paper presents a proposal for developing secure social media spaces for groups of people that could be vulnerable to external influences. These could be refuges from war torn or politically unstable countries that could be persecute... Read More about Secure Social Media Spaces for Communities of Vulnerable People.

Hybrid Data Set Optimization in Recommender Systems Using Fuzzy T-Norms (2019)
Conference Proceeding
Papaleonidas, A., Pimenidis, E., & Iliadis, L. (2019). Hybrid Data Set Optimization in Recommender Systems Using Fuzzy T-Norms. In J. MacIntyre, I. Maglogiannis, L. Iliadis, & E. Pimenidis (Eds.), https://doi.org/10.1007/978-3-030-19823-7_54

© 2019, IFIP International Federation for Information Processing. A recommender system uses specific algorithms and techniques in order to suggest specific services, goods or other type of recommendations that users could be interested in. User’s pre... Read More about Hybrid Data Set Optimization in Recommender Systems Using Fuzzy T-Norms.

An approach for Web Service selection and dynamic composition based on Linked open Data (2018)
Book Chapter
Vesyropoulos, N., Georgiadis, C., & Pimenidis, E. (2018). An approach for Web Service selection and dynamic composition based on Linked open Data. In R. Kowalczyk, & N. T. Nguyen (Eds.), Transactions on Computational Collective Intelligence XXX, (54-71). Springer. https://doi.org/10.1007/978-3-319-99810-7_3

The wide adoption of the Service Oriented Architecture (SOA) paradigm has provided a means for heterogeneous systems to seamlessly interact and exchange data. Thus, enterprises and end-users have widely utilized Web Services (WS), either as stand-alo... Read More about An approach for Web Service selection and dynamic composition based on Linked open Data.

Reproduction of experiments in recommender systems evaluation based on explanations (2018)
Book Chapter
Polatidis, N., & Pimenidis, E. (2018). Reproduction of experiments in recommender systems evaluation based on explanations. In E. Pimenidis, & C. Jayne (Eds.), Engineering Applications of Neural NetworksSpringer International Publishing AG. https://doi.org/10.1007/978-3-319-98204-5

The offline evaluation of recommender systems is typically based on accuracy metrics such as the Mean Absolute Error (MAE) and the Root Mean Squared Error (RMSE), while on the other hand Precision and Recall is used to measure the quality of the top-... Read More about Reproduction of experiments in recommender systems evaluation based on explanations.

Mobile recommender systems: Identifying the major concepts (2018)
Journal Article
Pimenidis, E., Polatidis, N., & Mouratidis, H. (2019). Mobile recommender systems: Identifying the major concepts. Journal of Information Science, 45(3), 387-397. https://doi.org/10.1177/0165551518792213

© The Author(s) 2018. This article identifies the factors that have an impact on mobile recommender systems. Recommender systems have become a technology that has been widely used by various online applications in situations where there is an informa... Read More about Mobile recommender systems: Identifying the major concepts.

From product recommendation to cyber-attack prediction: generating attack graphs and predicting future attacks (2018)
Journal Article
Polatidis, N., Pimenidis, E., Pavlidis, M., Papastergiou, S., & Mouratidis, H. (2018). From product recommendation to cyber-attack prediction: generating attack graphs and predicting future attacks. Evolving Systems, https://doi.org/10.1007/s12530-018-9234-z

© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Modern information society depends on reliable functionality of information systems infrastructure, while at the same time the number of cyber-attacks has been increasing over the years a... Read More about From product recommendation to cyber-attack prediction: generating attack graphs and predicting future attacks.

Reproducibility of experiments in recommender systems evaluation (2018)
Journal Article
Polatidis, N., Kapetanakis, S., Pimenidis, E., & Kosmidis, K. (2018). Reproducibility of experiments in recommender systems evaluation. IFIP Advances in Information and Communication Technology, 519, 401-409. https://doi.org/10.1007/978-3-319-92007-8_34

© IFIP International Federation for Information Processing 2018 Published by Springer International Publishing AG 2018. All Rights Reserved. Recommender systems evaluation is usually based on predictive accuracy metrics with better scores meaning rec... Read More about Reproducibility of experiments in recommender systems evaluation.

Smart Cross-Border e-Gov Systems: An application to refugee mobility (2017)
Journal Article
Sideridis, A., Protopappas, L., Tsiafoulis, S., & Pimenidis, E. (2017). Smart Cross-Border e-Gov Systems: An application to refugee mobility. International Journal of Electronic Governance, 9(3/4), 246-266. https://doi.org/10.1504/IJEG.2017.10006256

Smart Cross-Border e-Government Systems for citizens and business have been recently proposed to further improve everyday lives, expand business fron-tiers, and facilitate the movement of citizens by reducing the constraints imposed by existing borde... Read More about Smart Cross-Border e-Gov Systems: An application to refugee mobility.

E-voting vs. e-trust: A test bed for e-democracy in a world in crisis? (2017)
Journal Article
Shat, F., & Pimenidis, E. (2017). E-voting vs. e-trust: A test bed for e-democracy in a world in crisis?. International Journal of Electronic Governance, 9(3/4), 229-245. https://doi.org/10.1504/IJEG.2017.10006254

The world is currently experiencing a number of real challenges in the face of persistent economic crisis, local conflicts and huge waves of refugees. All of the above are affecting secure access to, completion of peoples’voting rights and participat... Read More about E-voting vs. e-trust: A test bed for e-democracy in a world in crisis?.

A method for privacy-preserving collaborative filtering recommendations (2017)
Journal Article
Georgiadis, C., Polatidis, N., Mouratidis, H., & Pimenidis, E. (2017). A method for privacy-preserving collaborative filtering recommendations. Journal of Universal Computer Science, 23(2), 146-166

With the continuous growth of the Internet and the progress of electronic commerce the issues of product recommendation and privacy protection are becoming increasingly important. Recommender Systems aim to solve the information overload problem by p... Read More about A method for privacy-preserving collaborative filtering recommendations.

Privacy-preserving recommendations in context-aware mobile environments (2017)
Journal Article
Stiakakis, E., Georgiadis, C. K., Polatidis, N., Georgiadis, C., Pimenidis, E., & Stiakakis, E. (2017). Privacy-preserving recommendations in context-aware mobile environments. Information and Computer Security, 25(1), 62-79. https://doi.org/10.1108/ICS-04-2016-0028

© Emerald Publishing Limited. Purpose - This paper aims to address privacy concerns that arise from the use of mobile recommender systems when processing contextual information relating to the user. Mobile recommender systems aim to solve the informa... Read More about Privacy-preserving recommendations in context-aware mobile environments.

Recommender systems meeting security: From product recommendation to cyber-attack prediction (2017)
Journal Article
Pavlidis, M., Polatidis, N., Pimenidis, E., Pavlidis, M., & Mouratidis, H. (2017). Recommender systems meeting security: From product recommendation to cyber-attack prediction. Communications in Computer and Information Science, 744, 508-519. https://doi.org/10.1007/978-3-319-65172-9_43

© Springer International Publishing AG 2017. Modern information society depends on reliable functionality of information systems infrastructure, while at the same time the number of cyber-attacks has been increasing over the years and damages have be... Read More about Recommender systems meeting security: From product recommendation to cyber-attack prediction.

Towards effective e-voting system for refugees: Lessons from the case of Palestine (2016)
Presentation / Conference
Shat, F. J., Abbott, P., & Pimenidis, E. (2016, December). Towards effective e-voting system for refugees: Lessons from the case of Palestine. Paper presented at Annual Workshop of the AIS Special Interest Group for ICT in Global Development

Significant global challenges related to persistent economic crises, local conflicts and continuous waves of refugees being displaced from their countries of origin are affecting secure access to and completion of people’s voting rights. The relevant... Read More about Towards effective e-voting system for refugees: Lessons from the case of Palestine.

Privacy-preserving collaborative recommendations based on random perturbations (2016)
Journal Article
Georgiadis, C. K., Polatidis, N., Georgiadis, C., Pimenidis, E., & Mouratidis, H. (2017). Privacy-preserving collaborative recommendations based on random perturbations. Expert Systems with Applications, 71, 18-25. https://doi.org/10.1016/j.eswa.2016.11.018

© 2016 Elsevier Ltd Collaborative recommender systems offer a solution to the information overload problem found in online environments such as e-commerce. The use of collaborative filtering, the most widely used recommendation method, gives rise to... Read More about Privacy-preserving collaborative recommendations based on random perturbations.

E-voting versus e-trust: A case for e-democracy in Palestine (2016)
Journal Article
Shat, F., & Pimenidis, E. (2016). E-voting versus e-trust: A case for e-democracy in Palestine

The world at present is facing a number of real challenges in the face of persistent economic crisis, local conflicts and huge waves of refugees. All of the above are affecting secure access to and completion of peoples voting rights. The relevant te... Read More about E-voting versus e-trust: A case for e-democracy in Palestine.

Utilizing linked open data for web service selection and composition to support e-commerce transactions (2016)
Journal Article
Georgiadis, C. K., Vesyropoulos, N., Georgiadis, C., & Pimenidis, E. (2016). Utilizing linked open data for web service selection and composition to support e-commerce transactions. Lecture Notes in Artificial Intelligence, 9875 LNCS, 533-541. https://doi.org/10.1007/978-3-319-45243-2_49

© Springer International Publishing Switzerland 2016. Web Services (WS) have emerged during the past decades as a means for loosely coupled distributed systems to interact and communicate. Nevertheless, the abundance of services that can be retrieved... Read More about Utilizing linked open data for web service selection and composition to support e-commerce transactions.

Social media and E-voting – A secure and trusted political forum for palestine (2016)
Journal Article
Shat, F., & Pimenidis, E. (2016). Social media and E-voting – A secure and trusted political forum for palestine. Communications in Computer and Information Science, 630, 290-302. https://doi.org/10.1007/978-3-319-51064-4_23

© Springer International Publishing AG 2016. Electronic Government applications are nowadays a common tool for governments across the globe. The success rate in gaining the trust of citizens/users and the rates of participation in democratic processe... Read More about Social media and E-voting – A secure and trusted political forum for palestine.


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