- Kefalas P., Symeonidis P., Manolopoulos Y.: Recommendations Based on a Heterogeneous Spatio-Temporal Social Network, Work Wide Web, Vol.21, N.2, pp. 345-371, 2018 (BIB)
- Kefalas P., Symeonidis P., Manolopoulos Y.: A Graph-based Taxonomy of Recommendation Algorithms and Systems in LBSNs, IEEE Transactions on Knowledge & Data Engineering, Vol.28, N.3, pp. 604-622, 2016 (BIB)
- Symeonidis P.: Matrix and Tensor Decomposition in Recommender Systems, Proceedings of the 10th ACM Conference on Recommender Systems (RecSys'2016), pp. 429-430, Boston, MA, 2016 (BIB)
- Symeonidis P.: ClustHOSVD: Item Recommendation by Combining Semantically-enhanced Tag Clustering with Tensor HOSVD, IEEE Transactions on Systems, Man & Cybernetics - Part A: Systems and Humans, Vol.46, N.9, pp. 1240-1251, 2016 (BIB)
- Symeonidis P., Malakoudis D.: MoocRec.com : Massive Open Online Courses Recommender System, Proceedings of the Poster Track of the 10th ACM Conference on Recommender Systems (RecSys'2016), Boston, MA, 2016 (BIB)
- Symeonidis P., Zioupos A.: Matrix and Tensor Factorization Techniques for Recommender Systems, Springer Briefs in Computer Science, Springer, New York, NY, 2016. ISBN 978-3-319-41356-3 (BIB)
- Kefalas P., Symeonidis P.: Recommending Friends and Locations over a Heterogeneous Spatio-Temporal Graph, Proceedings of the 5th International Conference on Model & Data Engineering (MEDI'2015), pp. 271-284, Rhodes, Greece, 2015 (BIB)
- Sattari M., Toroslu I., Karagoz P., Symeonidis P., Manolopoulos Y.: Extended Feature Combination Model for Recommendations in Location-based Mobile Services, Knowledge & Information Systems, Vol.3, N.44, pp. 629-661, 2015 (BIB)
- Siddiqui Z.F., Tiakas E., Symeonidis P., Spiliopoulou M., Manolopoulos Y.: Learning Relational User Profiles and Recommending Items as their Preferences Change, International Journal of AI Tools, Vol.24, N.2, 2015 (BIB)
- Symeonidis P.: Matrix and Tensor Factorization with Applications, (eds.: Pitas I.), Graph-based Social Media Analysis, Chapman & Hall/CRC, , pp. 1-45, 2015 (BIB)
- Siddiqui Z.F., Tiakas E., Symeonidis P., Spiliopoulou M., Manolopoulos Y.: xStreams: Providing Item Recommendations to Users with Time-evolving Preferences, Proceedings of the 4th International Conference on Web Intelligence, Mining & Semantics (WIMS'2014), Thessaloniki, Greece, 2014 (BIB)
- Symeonidis P., Ntempos D., Manolopoulos Y.: Recommendation Systems for Location-based Social Networks, SpringerBriefs in Electrical and Computer Engineering, Springer, New York, NY, 2014. ISBN 978-1-4939-0286-6 (BIB)
- Symeonidis P., Perentis C.: Link Prediction in Multi-modal Social Networks, Proceedings of the European Conference on Machine Learning & Principles / Practice of Knowledge Discovery in Databases (ECML/PKDD'2014), pp. 147-162, Nancy, France, 2014 (BIB)
- Symeonidis P., Tiakas E.: Transitive Node Similarity: Predicting and Recommending Links in Signed Social Networks, World Wide Web Journal, Vol.4, N.17, pp. 743-776, 2014 (BIB)
- Kefalas P., Symeonidis P., Manolopoulos Y.: New Perspectives for Recommendations in Location-based Social Networks: Time, Privacy and Explainability (invited), Proceedings of the 5th International Conference on Management of Emergent Digital EcoSystems (MEDES'2013), pp. 1-8, Neumuenster Abbey, Luxembourg, 2013 (BIB)
- Longinidis P., Symeonidis P.: Corporate Dividend Policy Determinants: Intelligent versus a Traditional Approach, Intelligent Systems in Accounting, Finance & Management, Vol.20, N.2, pp. 111-139, 2013 (BIB)
- Symeonidis P., Iakovidou N., Mantas N., Manolopoulos Y.: From Biological to Social Networks: Link Prediction Based on Multi-way Spectral Clustering, Data & Knowledge Engineering, Vol.87, pp. 226-242, 2013 (BIB)
- Symeonidis P., Krinis A., Manolopoulos Y.: GeoSocialRec: Explaining Recommendations in Location-based Social Networks, Proceedings of the 17th East-European Conference on Advanced Databases & Information Systems (ADBIS'2013), pp. 84-97, Genova, Italy, 2013 (BIB)
- Symeonidis P., Mantas N.: Spectral Clustering for Link Prediction in Social Networks with Positive and Negative Links, Social Network Analysis & Mining, Vol.3, N.4, pp. 1433-1447, 2013 (BIB)
- Symeonidis P., Tiakas E., Manolopoulos Y.: A Unified Framework for Link and Rating Prediction in Multi-modal Social Networks, International Journal of Social Networks Mining, Vol.1, N.3/4, 2013 (BIB)
- Papadimitriou A., Symeonidis P., Manolopoulos Y.: Fast and Accurate Link Prediction in Social Networking Systems, Journal of Systems & Software, Vol.85, N.9, pp. 2119-2132, 2012 (BIB)
- Papadimitriou A., Symeonidis P., Manolopoulos Y.: A Generalized Taxonomy of Explanation Styles for Traditional and Social Recommender Systems, Data Mining & Knowledge Discovery, Vol.24, N.3, pp. 555-583, 2012 (BIB)
- Papadimitriou A., Symeonidis P., Manolopoulos Y.: Scalable Link Prediction in Social Networks based on Local Graph Characteristics, Proceedings of the 9th International Conference on Information Technology: New Generations (ITNG'2012), pp. 738-743, Las Vegas, NV, 2012 (BIB)
- Sattari M., Toroslu I., Senkul P., Manguoglu M., Symeonidis P., Manolopoulos Y.: Geo-activity Recommendations by using Improved Feature Combination, Proceedings of the 4rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks (UBICOMP-LBSN'2012), pp. 996-1003, Pittsburgh, PA, 2012 (BIB)
- Symeonidis P., Kehayov I, Manolopoulos I.: Text Classification by Aggregation of SVD Eigenvectors, Proceedings of the 16th East-European Conference on Advances in Databases & Information Systems (ADBIS'2012), pp. 385-398, Poznan, Poland, 2012 (BIB)
- Marinho L.B., Nanopoulos A., Schmidt-Thieme L., Jaeschke R., Hotho A., Stumme G., Symeonidis P.: Social Tagging Recommender Systems, (eds.: Ricci F., Rokach L., Shapira B., Kantor P.), Recommender Systems Handbook, Springer, , pp. 615-644, 2011 (BIB)
- Papadimitriou A., Symeonidis P., Manolopoulos Y.: Geo-social Recommendations, Proceedings of the RecSys Workshop on Personalization on Mobile Applications (PeMA'2011), Chicago, IL, 2011 (BIB)
- Papadimitriou A., Symeonidis P., Manolopoulos Y.: Predicting Links in Social Networks of Trust via Bounded Local Path Traversal, Proceedings of the 3rd Conference on Computational Aspects of Social Networks (CASON'2011), Salamanca, Spain, 2011 (BIB)
- Siddiqui Z.F., Spiliopoulou M., Symeonidis P, Tiakas E.: A Data Generator for Multi-Stream Data, Proceedings of the PKDD Workshop Mining Ubiquitous & Social Environments (MUSE'2011), Athens, Greece, 2011 (BIB)
- Symeonidis P., Manolopoulos Y.: Explaining Recommendations of Movies in Web Video Rental Businesses (invited), Proceedings of the 2nd Symposium on Business Informatics in Central & Eastern Europe (CEE'2011), Cluj-Napoca, Romania, 2011 (BIB)
- Symeonidis P., Papadimitriou A., Manolopoulos Y., Senkul P., Toroslu I.: Geo-social Recommendations based on Incremental Tensor Reduction and Local Path Traversal, Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Location-Based Social Networks (LBSN'2011), Chicago, IL, 2011 (BIB)
- Symeonidis P., Tiakas E., Manolopoulos Y.: Product Recommendation and Rating Prediction based on Multi-modal Social Networks, Proceedings of the 5th International Conference on Recommender Systems (RecSys'2011), pp. 61-68, Chicago, IL, 2011 (BIB)
- Deligiaouri A., Symeonidis P.: YouTube Debate: a New Era of Internetized Television Politics?, International Journal on E-Politics, Vol.1, N.2, pp. 46-64, 2010 (BIB)
- Iakovidou N., Symeonidis P., Manolopoulos Y.: Multiway Spectral Clustering Link Prediction in Protein-Protein Interaction Networks, Proceedings of the 10th IEEE International Conference on Information Technology & Applications in Biomedicine (ITAB'2010), Corfu, Greece, 2010 (BIB)
- Nanopoulos A., Rafailidis D., Symeonidis P., Manolopoulos Y.: MusicBox: Personalized Music Recommendation based on Cubic Analysis of Social Tags, IEEE Transactions on Audio, Speech & Language Processing, Vol.18, N.2, pp. 407-412, 2010 (BIB)
- Symeonidis P., Nanopoulos A., Manolopoulos Y.: A Unified Framework for Providing Recommendations in Social Tagging Systems based on Ternary Semantic Analysis, IEEE Transactions on Knowledge & Data Engineering, Vol.22, N.2, pp. 179-192, 2010 (BIB)
- Symeonidis P., Tiakas E., Manolopoulos Y.: Transitive Node similarity for Link Prediction in Social Networks with Positive and Negative Links, Proceedings of the 4th International Conference on Recommender Systems (RecSys'2010), pp. 183-190, Barcelona, Spain, 2010 (BIB)
- Symeonidis P.: User Recommendations based on Tensor Dimensionality Reduction, Proceedings of the 5th IFIP Conference on Artificial Intelligence Applications & Innovations (AIAI'2009), pp. 331-340, Thessaloniki, Greece, 2009 (BIB)
- Symeonidis P., Deligiaouri A.: Recommending Posts in Political Blogs based on Tensor Dimensionality Reduction, International Journal of Engineering Intelligent Systems, Vol.17, N.2-3, pp. 153-161, 2009 (BIB)
- Symeonidis P., Nanopoulos A., Manolopoulos Y.: MoviExplain: A Recommender System with Explanations, Proceedings of the 3rd ACM Conference in Recommender Systems (RecSys'2009), pp. 317-320, New York, NY, 2009 (BIB)
- Symeonidis P., Nanopoulos A., Manolopoulos Y.: Justified Recommendations based on Content and Rating Data, Proceedings of the 10th International ACM KDD Workshop on Web Mining & Web Usage Analysis (WebKDD'2008), Las Vegas, NV, 2008 (BIB)
- Symeonidis P., Nanopoulos A., Manolopoulos Y.: Providing Justifications in Recommender Systems, IEEE Transactions on Systems, Man & Cybernetics - Part A: Systems & Humans, Vol.38, N.6, pp. 1262-1272, 2008 (BIB)
- Symeonidis P., Nanopoulos A., Manolopoulos Y.: Tag Recommendations based on Tensor Dimensionality Reduction, Proceedings of the 2nd ACM Conference in Recommender Systems (RecSys'2008), pp. 43-50, Lausanne, Switzerland, 2008 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A., Manolopoulos Y.: Collaborative Recommender Systems: Combining Effectiveness and Efficiency, Expert Systems with Applications, Vol.34, N.4, pp. 2995-3013, 2008 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A., Manolopoulos Y.: Nearest-Biclusters Collaborative Filtering based on Constant and Coherent Values, Information Retrieval, Vol.11, pp. 51-75, 2008 (BIB)
- Symeonidis P., Ruxanda M., Nanopoulos A. Manolopoulos Y.: Ternary Semantic Analysis of Social Tags for Personalized Music Recommendation, Proceedings of the 9th International Symposium on Music Information Retrieval (ISMIR'2008), pp. 219-224, Philadelphia, PA, 2008 (BIB)
- Symeonidis P.: Content-based Dimensionality Reduction for Recommender Systems, Proceedings of the 31st Conference of the German Classification Society (GfKl'2007), Freiburg, Germany, 2007 (BIB)
- Symeonidis P., Nanopoulos A., Manolopoulos Y.: Feature-weighed User Model for Recommender Systems, Proceedings of the 11th International Conference on User Modeling (UM'2007), pp. 97-106, Corfu, Greece, 2007 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A., Manolopoulos Y.: Nearest-biclusters Collaborative Filtering based on Constant Values, (eds.: Nasraoui O., Spiliopoulou M., Srivastava J., Mobasher B., Masand B.), Advances in Web Mining & Web Usage Analysis, Springer LNCS, , Vol.4811, pp. 36-55, 2007 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A.N., Manolopoulos Y.: Scalable Collaborative Filtering Based on Latent Semantic Indexing, Proceedings of the 21st AAAI Workshop on Intelligent Techniques for Web Personalization (ITWP'2006), pp. 1-9, Boston, MA, 2006 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A.N., Manolopoulos Y.: Nearest-Biclusters Collaborative Filtering, Proceedings of the 12th KDD Workshop on Knowledge Discovery from the Web (WEBKDD'2006), pp. 21-29, Philadelpia, PA, 2006 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A.N., Manolopoulos Y.: Collaborative Filtering : Fallacies and Insights in Measuring Similarity, Proceedings of the 10th PKDD Workshop on Web Mining (WEBMine'2006), pp. 56-67, Berlin, Germany, 2006 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A.N., Manolopoulos Y.: Collaborative Filtering Process in a Whole New Light, Proceedings of the 10th IEEE International Database Engineering & Applications Symposium (IDEAS'2006), pp. 29-36, New Delhi, India, 2006 (BIB)
- Symeonidis P., Nanopoulos A., Papadopoulos A.N., Manolopoulos Y.: Collaborative Filtering Based on Users Trends, Proceedings of the 30th Conference of the German Classification Society (GfKl'2006), Berlin, Germany, 2006 (BIB)
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