{"id":68,"date":"2018-12-12T12:07:54","date_gmt":"2018-12-12T12:07:54","guid":{"rendered":"https:\/\/www.panagiotissymeonidis.com\/?page_id=68"},"modified":"2023-03-12T11:02:32","modified_gmt":"2023-03-12T11:02:32","slug":"publications-2","status":"publish","type":"page","link":"https:\/\/www.panagiotissymeonidis.com\/?page_id=68","title":{"rendered":"Publications"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Link to my <a href=\"https:\/\/scholar.google.com\/citations?user=ppnPt2MAAAAJ&amp;hl=en\">Google Scholar Profile<\/a>.<\/h4>\n\n\n\n<h2 class=\"wp-block-heading\">International Books\/Monographs<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>P. Symeonidis, A. Zioupos: \u201c<em>Matrix and Tensor Factorization Techniques for Recommender Systems<\/em>\u201d, Series: Springer Briefs in Computer Science, 2017, 102 pages, 29 b\/w illustrations, 22 illustrations in colour, ISBN,978-3-319-41356-3 (<a href=\"http:\/\/www.springer.com\/us\/book\/9783319413563\">DOI<\/a>)<\/li>\n\n\n\n<li>P. Symeonidis, D. Ntempos, Y. Manolopoulos: \u201c<em>Recommender Systems for Location-based Social Networks<\/em>\u201d, Series: Springer Briefs in Electrical and Computer Engineering, 2014, 118 pages, 41 illus., Softcover, ISBN 978-1-4939-0285-9 (<a href=\"http:\/\/www.springer.com\/computer\/database+management+information+retrieval\/book\/978-1-4939-0285-9\">DOI<\/a>)<\/li>\n\n\n\n<li>L. Balby Marinho, A. Hotho, R. J\u00e4schke, A. Nanopoulos, S. Rendle, L. Schmidt-Thieme, G. Stumme, P. Symeonidis: \u201c<em>Recommender Systems for Social Tagging Systems<\/em>\u201d, Series: SpringerBriefs in Electrical and Computer Engineering, 2012, 115 pages, 35 illus., Softcover, ISBN 978-1-4614-1893-1 (<a href=\"http:\/\/www.springer.com\/computer\/database+management+information+retrieval\/book\/978-1-4614-1893-1\">DOI<\/a>)<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Greek Textbooks<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u03a0\u03b1\u03bd\u03b1\u03b3\u03b9\u03ce\u03c4\u03b7\u03c2 \u03a3\u03c5\u03bc\u03b5\u03c9\u03bd\u03af\u03b4\u03b7\u03c2, (2023). \u0395\u03c5\u03c6\u03c5\u03ae \u03a3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03a3\u03c5\u03c3\u03c4\u03ac\u03c3\u03b5\u03c9\u03bd. \u0391\u03b8\u03ae\u03bd\u03b1, \u039a\u03ac\u03bb\u03bb\u03b9\u03c0\u03bf\u03c2, \u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03ad\u03c2 \u0391\u03ba\u03b1\u03b4\u03b7\u03bc\u03b1\u03ca\u03ba\u03ad\u03c2 \u0395\u03ba\u03b4\u03cc\u03c3\u03b5\u03b9\u03c2. http:\/\/dx.doi.org\/10.57713\/kallipos-156 ISBN: 978-618-5726-37-9<\/li>\n\n\n\n<li>\u03a0\u03b1\u03bd\u03b1\u03b3\u03b9\u03ce\u03c4\u03b7\u03c2 \u03a3\u03c5\u03bc\u03b5\u03c9\u03bd\u03af\u03b4\u03b7\u03c2, \u0393\u03bf\u03cd\u03bd\u03b1\u03c1\u03b7\u03c2 \u0391\u03bd\u03b1\u03c3\u03c4\u03ac\u03c3\u03b9\u03bf\u03c2, \u201c<em>\u0392\u03ac\u03c3\u03b5\u03b9\u03c2 \u0391\u03c0\u03bf\u03b8\u03ae\u03ba\u03b5\u03c2 \u03ba\u03b1\u03b9 \u0395\u03be\u03cc\u03c1\u03c5\u03be\u03b7 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd: \u03a3\u03c4\u03bf \u0395\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u03bc\u03b5 \u03c4\u03bf\u03bd SQL Server<\/em>\u201d, \u0391\u03b8\u03ae\u03bd\u03b1: \u03a3\u03cd\u03bd\u03b4\u03b5\u03c3\u03bc\u03bf\u03c2 \u0395\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ce\u03bd \u0391\u03ba\u03b1\u03b4\u03b7\u03bc\u03b1\u03ca\u03ba\u03ce\u03bd \u0392\u03b9\u03b2\u03bb\u03b9\u03bf\u03b8\u03b7\u03ba\u03ce\u03bd. ISBN: 978-960-603-021-5 (<a href=\"http:\/\/hdl.handle.net\/11419\/276\">DOI<\/a>)<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Journal Publications<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Symeonidis, P., Chaltsev, D., Berbague, C. and Zanker, M., 2022. Sequence-aware news recommendations by combining intra-with inter-session user information. Information Retrieval Journal, 25(4), pp.461-480.<\/li>\n\n\n\n<li>Symeonidis, P., Chairistanidis, S. &amp; Zanker, M. Safe, effective and explainable drug recommendation based on medical data integration. User Modelling and User-adapted Interaction (2022). <a href=\"https:\/\/doi.org\/10.1007\/s11257-022-09342-x\">https:\/\/doi.org\/10.1007\/s11257-022-09342-x<\/a><\/li>\n\n\n\n<li>Berbague, C.E., Seridi-Bouchelaghem, H., El-Islem, K.N., Symeonidis, P. and Zanker, M., 2022. An evolutionary-based approach for providing accurate and novel recommendations. International Journal of Business Intelligence and Data Mining, 21(2), pp.129-148.<\/li>\n\n\n\n<li>Zheng, Y., Chen, L., Zanker, M., Symeonidis, P.: JIIS preface for the special issue on advances in recommender systems. <em>Journal of Intelligent Information Systems (Springer) <\/em>58(2): 223-225 (2022)<\/li>\n\n\n\n<li>Symeonidis, P., Kirjackaja, L., Zanker, M. \u201cSession-based News Recommendations using SimRank on multi-modal Graphs\u201d, <em>Expert Systems with Applications (Elsevier), <\/em>2021<em>&nbsp; <\/em><a href=\"https:\/\/doi.org\/10.1016\/j.eswa.2021.115028\">https:\/\/doi.org\/10.1016\/j.eswa.2021.115028<\/a><\/li>\n\n\n\n<li>Berbague, C., Karabadji, N., Seridi, H., Symeonidis, P., Manolopoulos, Y., Dhifli, W. \u201cAn overlapping clustering approach for precision, and novelty-aware recommendation\u201d, <em>Expert Systems with Applications <\/em>(Elsevier) vol. 177, 2021<\/li>\n\n\n\n<li>Makbule Gulcin Ozsoy, Diarmuid O&#8217;Reilly-Morgan, Panagiotis Symeonidis, Elias Z. Tragos, Neil Hurley, Barry Smyth, Aonghus Lawlor: MP4Rec: Explainable and Accurate Top-N Recommendations in Heterogeneous Information Networks. <em>IEEE Access<\/em> (8) pages: 181835-181847 (2020)<\/li>\n\n\n\n<li>Symeonidis, P., Kirjackaja, L., Zanker, M. \u201cSession\u2011aware news recommendations using random walks on time\u2011evolving heterogeneous information networks\u201d, <em>User Modelling and User-Adapted Interaction, <\/em><a href=\"https:\/\/doi.org\/10.1007\/s11257-020-09261-9\">https:\/\/doi.org\/10.1007\/s11257-020-09261-9<\/a>, 2020<\/li>\n\n\n\n<li>P. Symeonidis, L. Coba, M. Zanker: \u201cPersonalized Novel and Explainable Matrix Factorization\u201d, Data and Knowledge Engineering Journal, Elsevier (accepted for publication in June 2019)<\/li>\n\n\n\n<li>P. Symeonidis, L. Coba, M. Zanker: \u201cCounteracting the Filter Bubble in Recommender Systems: Novelty-aware Matrix Factorization, Intelligenza Artificiale, IOS Press (accepted for publication in June 2019)<\/li>\n\n\n\n<li>P. Kefalas, P. Symeonidis, Y. Manolopoulos: \u201cRecommendations based on a Heterogeneous Spatio-temporal Social Network\u201d, <em>World Wide Web<\/em>, Vol. 21,N. 2, pp. 345-371, 2017. <strong>(Impact factor in 2017: 1.405)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, D. Malakoiudis: \u201cMulti-Modal Matrix Factorization with Side Information for Recommending Massive Open Online Courses\u201d, Expert Systems with Applications, Vol. 118, pp. 261 \u2013 271, 2019, DOI:https:\/\/doi.org\/10.1016\/j.eswa.2018.09.053<\/li>\n\n\n\n<li>P. Kefalas, P. Symeonidis, Y. Manolopoulos: \u201cA Graph-based Taxonomy of Recommendation Algorithms and Systems in LBSNs\u201d, <em>IEEE Transactions on Knowledge &amp; Data Engineering<\/em>, Vol.28, N.3, pp. 604-622, 2016<strong>. (Impact factor in 2016: 3.438) <\/strong><\/li>\n\n\n\n<li>P. Symeonidis: \u201cClustHOSVD: Item Recommendation by Combining Semantically-enhanced Tag Clustering with Tensor HOSVD\u201d, <em>IEEE Transactions on Systems, Man &amp; Cybernetics &#8211; Part A: Systems<\/em> <em>&amp;Humans<\/em>, Vol. 46, No. 9, 2016. <strong>(Impact factor in 2016: 2.350)<\/strong><\/li>\n\n\n\n<li>M. Sattari, I. Toroslu, P. Karagoz, P. Symeonidis, Y. Manolopoulos: \u201cExtended Feature Combination Model forRecommendations in Location-based Mobile Services\u201d, <em>Knowledge &amp; Information Systems<\/em>, Vol.3, N.44, pp. 629-661,2015. <strong>(Impact factor in 2015: 1.702)<\/strong><\/li>\n\n\n\n<li>Z.F. Siddiqui, E. Tiakas, P. Symeonidis, M. Spiliopoulou, Y. Manolopoulos: \u201cLearning Relational User Profiles and Recommending Items as their Preferences Change\u201d, <em>International Journal of AI Tools,<\/em> Vol.24, N.2, 2015&nbsp;<strong>(impact factor in 2015: 0.530)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, E. Tiakas: \u201cTransitive Node Similarity: Predicting and Recommending Links in Signed Social Networks\u201d, <em>World Wide Web<\/em>, Vol.17, No.4, pp.743-776, 2014. <strong>(impact factor in 2014: 1.474)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, E. Tiakas, Y. Manolopoulos: \u201cA Unified Framework for Link and Rating Prediction in Multi-modal SocialNetworks\u201d, <em>International Journal ofSocial Network Mining<\/em>, Vol.1, No.3\/4, 2013.<\/li>\n\n\n\n<li>P. Symeonidis, N. Mantas: \u201cSpectral Clustering for Link Prediction in Social Networks with Positive and Negative Links\u201d, <em>Social Network Analysis &amp; Mining<\/em>, Vol.3, No.4, pp.1433-1447, 2013. <strong>(impact factor in 2013: 0.503)<\/strong><\/li>\n\n\n\n<li>P.Symeonidis, N. Iakovidou, N. Mantas, Y. Manolopoulos: \u201cFrom Biological to Social Networks: Link prediction based on Multi-way Spectral Clustering\u201d, <em>Data &amp; Knowledge Engineering<\/em>, Vol.87, pp.226-242, 2013. <strong>(impact factor in 2013: 1.489)<\/strong><\/li>\n\n\n\n<li>P. Longinidis, P. Symeonidis: \u201cCorporate Dividend Policy Determinants: Intelligent versus a Traditional Approach\u201d, <em>Intelligent Systems in Accounting, Finance &amp; Management<\/em>, Vol.20, No.2, pp.111-139, 2013.<\/li>\n\n\n\n<li>A. Papadimitriou, P. Symeonidis, Y. Manolopoulos: \u201cFast and Accurate Link Prediction in Social Networking Systems\u201d,&nbsp;<em>Journal of Systems &amp; Software<\/em>, Vol.85, No.9, pp.2119-2132, 2012. <strong>(impact factor in 2012: 1.135)<\/strong><\/li>\n\n\n\n<li>A. Papadimitriou, P. Symeonidis, Y. Manolopoulos: \u201cA Generalized Taxonomy of Explanations Styles for Traditional and Social Recommender Systems\u201d, <em>Data Mining &amp; Knowledge Discovery<\/em>, pp.1-29, 2011. <strong>(impact factor in 2011:1.545)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, A. Nanopoulos, Y. Manolopoulos: \u201cA Unified Framework for Providing Recommendations in Social Tagging Systems Based on Ternary Semantic Analysis\u201d, <em>IEEE Transactions on Knowledge &amp; Data Engineering<\/em>, Vol.22, No.2, 2010. <strong>(impact factor in 2010: 1.851)<\/strong><\/li>\n\n\n\n<li>A.Nanopoulos, D. Rafailidis, P. Symeonidis, Y. Manolopoulos: \u201cMusicBox: Personalized Music Recommendation based on Cubic Analysis of Social Tags\u201d, <em>IEEE Transactions on Audio, Speech &amp;Language Processing<\/em>, Vol.18, No.2, 2010. <strong>(impact factor in 2010: 1.668)<\/strong><\/li>\n\n\n\n<li>A. Deligiaouri, P. Symeonidis: \u201cSkai (TV) &#8211; YouTube Debate\u201d: A New Era of Internetized Television Politics\u201d, <em>International Journal of E-Politics<\/em>, Vol.1, No.2, 2010 (publisher: IGI global).<\/li>\n\n\n\n<li>P. Symeonidis, A. Deligiaouri: \u201cRecommending Posts in Political Blogs based on Tensor Dimensionality Reduction\u201d, <em>International Journal of Engineering Intelligent Systems<\/em>, Vol.17, No.2-3, 2009. <strong>(impact factor in 2009: 0.205)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, A. Nanopoulos, Y. Manolopoulos: \u201cProviding Justifications in Recommender Systems\u201d, <em>IEEE Transactions on Systems, Man &amp; Cybernetics &#8211; Part A: Systems &amp; Humans<\/em>, Vol.38, No.6, 2008. <strong>(impactfactor in 2008: 1.350)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cNearest-biclusters Collaborative Filtering with Constant and Coherent Values\u201d, <em>Information Retrieval<\/em>, Vol.11, No.1, 2008. <strong>(5-year impact factor in 2008: 1.396)<\/strong><\/li>\n\n\n\n<li>P. Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cCollaborative Filtering Systems: Combining Effectiveness and Efficiency\u201d, <em>Expert Systems with Applications<\/em>, Vol.34, No.4, pp.51-75, 2008. <strong>(impact factor in 2008: 2.596)<\/strong><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Book Chapters<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>G. Sottocornola, F.&nbsp;Stella, P.&nbsp;Symeonidis, M.&nbsp;Zanker, I.&nbsp;Krajger, R.&nbsp;Faullant, and E.&nbsp;Schwarz: Identifying Innovative Idea Proposals with Topic Models\u2014A Case Study from SPA Tourism. In: Sigala M., Rahimi R., Thelwall M. (eds) Big Data and Innovation in Tourism, Travel, and Hospitality. Springer, Singapore, pp 115-133, 2019<\/li>\n\n\n\n<li>P. Symeonidis, D. Malakoudis: \u201cMoocRec.com: Massive Open Online Courses recommender system\u201d chapter in the book entitled \u201c<em>Collaborative Recommendations: Algorithms, Practical Challenges and Applications<\/em>\u201d (to appear in the end of 2018).<\/li>\n\n\n\n<li>P. Symeonidis: \u201cMatrix and Tensor Factorization in Recommender Systems\u201d, chapter in the book entitled \u201c<em>Graph-based Social Media Analysis<\/em>\u201d, by I. Pitas (ed.), CRC Press, Taylor &amp; Francis group, Chapman &amp; Hall\/CRC, pp. 187-210, 2015, 2015.<\/li>\n\n\n\n<li>L. Marinho, A. Nanopoulos, L. Schmidt-Thieme, R. Jaschke, A. Hotho, G.Stumme, P. Symeonidis: \u201cSocial Tagging Recommender Systems\u201d, chapter in book entitled \u201c<em>Recommender Systems Handbook<\/em>\u201d, by F. Ricci, L. Rokach, B. Shaphira, P.B. Kantor (eds.): LNCS Springer Book, pp. 615-644, 2011.<\/li>\n\n\n\n<li>A. Deligiaouri, P. Symeonidis: \u201cInternetized Television Debates: Enhancing Citizens\u2019 Participation\u201d, chapter in book entitled \u201c<em>E-Politics and Organizational Implications of the Internet: Power, Influence and Social Change<\/em>\u201d by C.R. Livermore (ed.), IGI Global, 2011.<\/li>\n\n\n\n<li>P. Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cNearest-biclusters Collaborative Filtering based on constant values\u201d, chapter in book entitled \u201c<em>Advances in Web Mining and Web Usage Analysis<\/em>\u201d, by O. Nasraoui, O. Zaiane, M. Spiliopoulou, M.Mobasher, B. Masand, P. Yu (eds.), LNCS Springer, Vol.4811, pp.36-55, 2007.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Conference Papers<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Symeonidis, P., Chairistanidis, S., &amp; Zanker, M. (2022, November). Deep Reinforcement Learning for Medicine Recommendation. In 2022 IEEE 22nd International Conference on Bioinformatics and Bioengineering (BIBE) (pp. 85-90). IEEE.<\/li>\n\n\n\n<li>Symeonidis, P., Kostoulas, T., Danilatou, V., Andras, C., &amp; Chairistanidis, S. (2022, November). Mortality Prediction and Safe Drug Recommendation for Critically-ill Patients. In 2022 IEEE 22nd International Conference on Bioinformatics and Bioengineering (BIBE) (pp. 79-84). IEEE.<\/li>\n\n\n\n<li>Symeonidis, P., Kirjackaja, L., Zanker, M. \u201cSession-based Recommendation along with the Session Style of Explanation\u201d, European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML\/PKDD), pp. 147-162, Grenoble France, 2022<\/li>\n\n\n\n<li>Panagiotis Symeonidis, Stergios Chairistanidis, Markus Zanker: Recommending What Drug to Prescribe Next for Accurate and Explainable Medical Decisions. IEEE Computer-based Medical Systems (IEEE CBMS 2021): 213-218<\/li>\n\n\n\n<li>Panagiotis Symeonidis, Christos Andras, Markus Zanker: Treatment Recommendations for COVID-19 Patients along with Robust Explanations. IEEE Computer-based Medical Systems (IEEE CBMS 2021) 2021: 207-212<\/li>\n\n\n\n<li>Panagiotis Symeonidis, Dmitry Chaltsev, Markus Zanker, Yannis Manolopoulos: News Recommendations by Combining Intra-session with Inter-session and Content-Based Probabilistic Modelling. International Conference on Computational Collective Intelligence (ICCCI 2021): 154-166<\/li>\n\n\n\n<li>Panagiotis Symeonidis: Similarity Search, Recommendation and Explainability over Graphs in Different Domains: Social Media, News, and Health Industry. IEEE International Conference on Web Engineering (IEEE ICWE 2021): 537-541, 2020<\/li>\n\n\n\n<li>Panagiotis Symeonidis, Andrea Janes, Dmitry Chaltsev, Philip Giuliani, Daniel Morandini, Andreas Unterhuber, Ludovik Coba, Markus Zanker: Recommending the Video to Watch Next: An Offline and Online Evaluation at YOUTV.de. ACM Recommender Systems Conference (RecSys 2020): 299-308<\/li>\n\n\n\n<li>L. Coba, M. Zanker, L. Rook, P. Symeonidis: \u201cDecision Making Strategies Differ in the Presence of Collaborative Explanations: Two Conjoint Studies\u201d Proceedings of the 24<sup>th<\/sup>International Conference on Intelligent User Interfaces, (to appear), Los Angeles, 2019.<\/li>\n\n\n\n<li>G. Sottocornola, P. Symeonidis, M. Zanker: \u201cSession-based News Recommendations\u201d, <em>Companion Proceedings of&nbsp; The Web Conference 2018, <\/em>pp. 1395-1399, 2018.<br>International World Wide Web Conferences Steering Committee.<\/li>\n\n\n\n<li>L. \u00c7oba, P.Symeonidis, M. Zanker: \u201cReplicating and Improving Top-N Recommendations in Open Source Packages\u201d, <em>Proceedings of the 8<sup>th&nbsp;<\/sup>International Conference on Web Intelligence, Mining and Semantics (WIMS),&nbsp;<\/em>Novi Sad, Serbia, 2018.<\/li>\n\n\n\n<li>L. Coba, M. Zanker, L.Rook, P. Symeonidis: \u201cExploring Users\u2019 Perception of Rating Summary Statistics\u201d,&nbsp;<em>Proceedings of the 26<sup>th<\/sup> Conferenceon User Modeling, Adaptation and Personalization (UMAP),<\/em> 2018.<\/li>\n\n\n\n<li>L. \u00c7oba, P. Symeonidis, M. Zanker: \u201cReproducing and Prototyping Recommender Systems in R\u201d, <em>Proceedings of the 8<sup>th<\/sup> Italian Information Retrieval Workshop<\/em>, 2017<\/li>\n\n\n\n<li>L. \u00c7oba, P.Symeonidis, M. Zanker: \u201cVisual Analysis of Recommendation Performance\u201d, <em>Proceedings of the 11<sup>th<\/sup> ACM Conference on Recommender Systems (RecSys), <\/em>pp.362-363, 2017.<\/li>\n\n\n\n<li>P. Symeonidis, S. Chairistanidis: \u201cCheckInShop.eu: A Sensor-based Recommender System for micro-location Marketing\u201d, <em>Proceedings ofthe 11<sup>th<\/sup> ACM Conference on Recommender Systems (RecSys),<\/em> pp.351-352,2017<\/li>\n\n\n\n<li>P. Symeonidis: \u201cMatrix and Tensor Decomposition in Recommender Systems\u201d, Tutorial Presentation at ACM RecSys&#8217;2016 conference, September 2016, Boston, MA.<\/li>\n\n\n\n<li>P. Kefalas, P.Symeonidis: \u201cRecommending Friends and Locations over a Heterogeneous Spatio-temporal Graph\u201d, <em>Proceedings of the 5<sup>th<\/sup>International Conference on Model &amp; Data Engineering (MEDI), <\/em>pp.271-284, Island of Rhodes, Greece, 2015.<\/li>\n\n\n\n<li>P. Symeonidis, C. Perentis: \u201cLink Prediction in Multi-modal Social Networks\u201d, <em>Proceedings of the International Conference on Machine Learning &amp; Knowledge Discovery in Databases (ECML\/PKDD), <\/em>pp. 147-162, Nancy France, 2014<\/li>\n\n\n\n<li>Z.F. Siddiqui, E.Tiakas, P. Symeonidis, M. Spiliopoulou, Y. Manolopoulos: \u201cxStreams: Providing Item Recommendations to Users with Time-evolving Preferences\u201d, <em>Proceedings of the 4<sup>th<\/sup>International Conference on Web Intelligence, Mining &amp; Semantics (WIMS),<\/em>Thessaloniki, Greece, 2014.<\/li>\n\n\n\n<li>P. Kefalas, P. Symeonidis, Y. Manolopoulos: \u201cNew Perspectives for Recommendations in Location-based Social Networks: Time, Privacy and Explainability\u201d, <em>Proceedings of the 5<sup>th<\/sup>International Conference on Management of Emergent Digital EcoSystems (MEDES),&nbsp;<\/em>pp.1-8, Neumuenster Abbey, Luxembourg, 2013.<\/li>\n\n\n\n<li>P. Symeonidis, A.Krinis, Y. Manolopoulos: \u201cGeoSocialRec: Explaining Recommendations in Location-based Social Networks\u201d, <em>Proceedings of the 17<sup>th<\/sup> East-European Conference on Advanced Databases &amp; Information Systems (ADBIS),<\/em> pp. 84-97, Genova, Italy, 2013.<\/li>\n\n\n\n<li>P. Symeonidis., I.Kehayov, Y. Manolopoulos: \u201cText Classification by Aggregation of SVD Eigenvectors\u201d, <em>Proceedings of the 16<sup>th<\/sup>East-European Conference on Advances in Databases &amp; Information Systems(ADBIS),<\/em> pp.385-398, Poznan, Poland, 2012.<\/li>\n\n\n\n<li>M. Sattari, I.Toroslu, P. Senkul, M. Manguoglu, P. Symeonidis, Y. Manolopoulos: \u201cGeo-activityRecommendations by using Improved Feature Combination\u201d, <em>Proceedings of the 4<sup>th<\/sup> ACM UNICOMP International Workshop onLocation-Based Social Networks (LBSN),<\/em> Pittsburgh, PA, 2012.<\/li>\n\n\n\n<li>A. Papadimitriou, P.Symeonidis, Y. Manolopoulos: \u201cScalable Link Prediction in Social Networks based on Local Graph Characteristics\u201d, <em>Proceedings of the 9<sup>th<\/sup> International Conference on Information Technology: NewGenerations (ITNG),<\/em> Las Vegas, NV, 2012<\/li>\n\n\n\n<li>P. Symeonidis, E.Tiakas, Y. Manolopoulos: \u201cProduct Recommendation and Rating Prediction based onMulti-modal Social Networks\u201d, <em>Proceedings of the 5<sup>th<\/sup> ACM Conference in Recommender Systems (RecSys), <\/em>Chicago,IL, 2011.<\/li>\n\n\n\n<li>P. Symeonidis, A.Papadimitriou, Y. Manolopoulos, P. Senkul, I. Toroslu: \u201cGeo-social Recommendations based on Incremental Tensor Reduction and Local PathTraversal\u201d, <em>Proceedings of the 3<sup>rd<\/sup>ACM SIGSPATIAL International Workshop on Location-Based Social Networks (LBSN),<\/em>Chicago, Illinois, 2011 <\/li>\n\n\n\n<li>A. Papadimitriou, P.Symeonidis, Y. Manolopoulos: \u201cGeo-social Recommendations\u201d, <em>Proceedings of the RecSys Workshop Personalization on Mobile Applications (PeMA),<\/em> Chicago, Illinois, 2011.<\/li>\n\n\n\n<li>A. Papadimitriou, P.Symeonidis, Y. Manolopoulos: \u201cPredicting Links in Social Networks of Trust via Bounded Local Path Traversal\u201d, <em>Proceedings of the 3<sup>rd<\/sup> Conference on Computational Aspects of Social Networks (CASON), <\/em>Salamanca, Spain, 2011.<\/li>\n\n\n\n<li>Z.F. Siddiqui, M.Spiliopoulou, P. Symeonidis, E. Tiakas: \u201cA Data Generator for Multi-Stream Data\u201d, <em>Proceedings of the PKDD Workshop Mining Ubiquitous &amp; Social Environments (MUSE), <\/em>Athens, Greece, 2011 <\/li>\n\n\n\n<li>P. Symeonidis, Y. Manolopoulos: \u201cExplaining Recommendations of Movies in Web Video Rental Businesses\u201d, <em>Proceedings of the 2<sup>nd<\/sup>Symposium on Business Informatics in Central &amp; Eastern Europe (CEE),<\/em>Cluj-Napoca, Romania, 2011<\/li>\n\n\n\n<li>P.Symeonidis, E. Tiakas, Y. Manolopoulos: \u201cTransitive Node similarity for Link Prediction in Social Networks with positive and negative links\u201d, <em>Proceedings of the 4<sup>th<\/sup> ACM Conference in Recommender Systems<\/em> (RecSys), pp.183-190, Barcelona, 2010.<\/li>\n\n\n\n<li>N.Iakovidou, P. Symeonidis, Y. Manolopoulos: \u201cMultiway Spectral Clustering Link Prediction in Protein-Protein Interaction Networks\u201d, <em>Proceedings of the 10<sup>th<\/sup> IEEE International Conference onInformation Technology &amp; Applications in Biomedicine (ITAB),<\/em> Corfu,2010.<\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, Y. Manolopoulos: \u201cMoviExplain: a Recommender Agent Providing Justified Recommendations\u201d, <em>Proceedings of the 3<sup>rd<\/sup> ACM Conference in Recommender Systems (RecSys),<\/em> NewYork, 2009.<\/li>\n\n\n\n<li>P. Symeonidis: \u201cUser Recommendations based on Tensor Dimensionality Reduction\u201d, <em>Proceedings of the 5<sup>th<\/sup> IFIP Conference on Artificial Intelligence Applications &amp; Innovations&nbsp;<\/em>(AIAI)<strong>, <\/strong>pp.331-341,Thessaloniki, Greece, 2009.<\/li>\n\n\n\n<li>P. Symeonidis, A.Nanopoulos, Y. Manolopoulos: \u201cTag Recommendations based on Tensor Dimensionality Reduction\u201d, <em>Proceedings of the 2<sup>nd<\/sup> ACM Conference in Recommender Systems<\/em> (RecSys),pp.43-50, Lausanne, 2008.<\/li>\n\n\n\n<li>P. Symeonidis, A.Nanopoulos, Y. Manolopoulos: \u201cJustified Recommendations based on Content and Rating Data\u201d, <em>Proceedings of the 10<sup>th<\/sup> WebKDD Workshop in conjunction with KDD Conference<\/em>, Las Vegas, NV, 2008.<\/li>\n\n\n\n<li>P. Symeonidis, M.Ruxanda, A. Nanopoulos, Y. Manolopoulos: \u201cTernary Semantic Analysis of Social Tags for Personalized Music Recommendation&#8221;, <em>Proceedings of the 9<sup>th<\/sup> Annual Conference on MusicInformation Retrieval (ISMIR),<\/em> pp.219-224, Philadelphia, 2008 <\/li>\n\n\n\n<li>P.Symeonidis: \u201cContent-based Dimensionality Reduction for Recommender Systems\u201d, <em>Proceedings of the 31<sup>st<\/sup> AnnualConference of the German Classification Society<\/em> (GfKl), Freiburg, Germany,2007.<\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cFeature-weighted User Model for Recommender Systems\u201d, <em>Proceedings of the 11<sup>th<\/sup>International Conference on User Modelling (UM)<\/em>, Vol.4511, pp.97-106,Corfu, Greece, 2007. <\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cCollaborative Filtering: Fallacies and Insights in Measuring Similarity\u201d, <em>Proceedings of the Web Mining Workshop held in conjunction with PKDD\/ECML conference<\/em>, pp.56-67,Berlin, Germany, 2006.<\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cNearest-Biclusters Collaborative Filtering\u201d, <em>Proceedings of the WebKDD Workshop held in conjunction with KDD<\/em>, pp.15-25, Philadelphia, PA, 2006. <\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cCollaborative Filtering based on Users Trends\u201d, <em>Proceedings of the 30<sup>th<\/sup> Annual Conference of the German Classification Society (GfKl)<\/em>, pp.375-382, Berlin,Germany, 2006.<\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cCollaborative Filtering Process in a Whole New Light\u201d, <em>Proceedings of the 10<sup>th<\/sup> International Symposium on Data Engineering &amp; Applications (IDEAS), <\/em>pp.29-36, Delhi, India, 2006.<\/li>\n\n\n\n<li>P.Symeonidis, A. Nanopoulos, A. Papadopoulos, Y. Manolopoulos: \u201cScalable Collaborative Filtering Based on Latent Semantic Indexing\u201d, <em>Proceedings of the AAAI Workshop on Intelligent Techniques for Web Personalization (ITWP)<\/em>,pp.1-9, Boston, MA, 2006.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Link to my Google Scholar Profile. 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