› Theses

  • N. Pelekis "STAU: A spatio-temporal extension for the ORACLE DBMS", PhD Thesis, UMIST, 2002.
  • N. Pelekis "Fuzzy Miner: A Fuzzy System for Solving Pattern Classification Problems", M.Sc. Thesis, UMIST, 1999.

    • › Monographs

  • N. Pelekis, Y. Theodoridis "Mobility Data Management and Exploration", Springer, New York, 2014, in press. ISBN 978-1-4939-0391-7.

    • › Articles in refereed journals

  • S. Mansalis, E. Ntoutsi, N. Pelekis and Y. Theodoridis "An Evaluation of Data Stream Clustering Algorithms", Statistical Analysis and Data Mining, to appear.
  • A. S. Furtado, L. O. C. Alvares, N. Pelekis, Y. Theodoridis and V. Bogorny "Unveiling Movement Uncertainty for Robust Trajectory Similarity Analysis", International Journal of Geographical Information Science, 32(1), 2018.
  • N. Pelekis, P. Tampakis, M. Vodas, C. Doulkeridis and Y. Theodoridis "On Temporal-Constrained Sub-Trajectory Cluster Analysis", Data Mining and Knowledge Discovery Journal. 2017. 31(5), 1294-1330, 2017. Springer
  • S. Sideridis, N. Pelekis and Y. Theodoridis "On Querying and Mining Semantic-aware Mobility Timelines", International Journal of Data Science and Analytics, 2(1), 29-44, 2016.
  • K. Patroumpas, E. Alevizos, A. Artikis, M. Vodas, N. Pelekis and Y. Theodoridis "Online Event Recognition from Moving Vessel Trajectories", GeoInformatica, 21(2), 389-427, 2016.
  • N. Pelekis, S. Sideridis, P. Tampakis and Y. Theodoridis "Simulating our LifeSteps by Example", ACM Transactions on Spatial Algorithms and Systems, Vol. 2, Issue 3, October 2016. ACM.
  • R. Fileto, C. May, C. Renso, N. Pelekis, D. Klein and Y. Theodoridis "The Baquara2 Knowledge-based Framework for Semantic Enrichment and Analysis of Movement Data", Data & Knowledge Engineering, 98:104-122, 2015. Elsevier.
  • A. Konstantinidis, G. Chatzililioudis, D. Zeinalipour-Yazti, P. Mpeis, N. Pelekis and Y. Theodoridis "Privacy-Preserving Indoor Localization on Smartphones", IEEE Transactions on Knowledge and Data Engineering, 27(11): 3042-3055, November 2015. IEEE CS Press.
  • N. Pelekis, E. Frentzos, N. Giatrakos, and Y. Theodoridis "HERMES: A Trajectory DB Engine for Mobility-Centric Applications", International Journal of Knowledge-based Organizations (IJKBO), 4(1), 2014. IGI Global.
  • C. Parent, S. Spaccapietra, C. Renso, G. Andrienko, N. Andrienko, V. Bogorny, M. L. Damiani, A. Gkoulalas-Divanis, J. Macedo, N. Pelekis, Y. Theodoridis, Z. Yan "Semantic Trajectories Modeling and Analysis", ACM Computing Surveys, 45(4), December 2013. ACM Press.
  • N. Pelekis, Y. Theodoridis, D. Janssens "On the management and analysis of our LifeSteps", SIGKDD Explorations, 15(1):23-32, June 2013. ACM.
  • G. Kellaris, N. Pelekis, Y. Theodoridis "Map-Matched Trajectory Compression", Journal of Systems and Software, 86(6):1566-1579, June 2013. Elsevier.
  • N. Pelekis, E. Frentzos, N. Giatrakos, and Y. Theodoridis "On the Support of Mobility in ORDBMS", International Journal of Knowledge-based Organizations (IJKBO), 4(1), 2014. IGI Global.
  • C. Panagiotakis, N. Pelekis, I. Kopanakis, E. Ramasso, Y. Theodoridis "Segmentation and Sampling of Moving Object Trajectories based on Representativeness", IEEE Transactions on Knowledge and Data Engineering, 24(7):1328-1343, July 2012. IEEE CS Press.
  • N. Pelekis, G. Andrienko, N. Andrienko, I. Kopanakis, G. Marketos, Y. Theodoridis "Visually Exploring Movement Data via Similarity-based Analysis", Journal of Intelligent Information Systems (JIIS), 38(2), 2012. Springer.
  • N. Pelekis, I. Kopanakis, E. Kotsifakos, E. Frentzos and Y. Theodoridis "Clustering Uncertain Trajectories", Knowledge and Information Systems (KAIS), 28(1):117-147, 2011. Springer.
  • A. Raffaetà, L. Leonardi, G. Marketos, G. Andrienko, N. Andrienko, E. Frentzos, N. Giatrakos, S. Orlando, N. Pelekis, A. Roncato, C. Silvestri "Visual Mobility Analysis using T-Warehouse", International Journal of Data Warehousing & Mining, 7(1), 2011.
  • H. Karanikas, G. Koundourakis, I. Kopanakis, T. Mavroudakis, N. Pelekis "Discovering market trends in the biotechnology industry", International Journal of Business Intelligence and Data Mining (IJBIDM), Vol. 6, No. 2, 2011.
  • D. K. Iakovidis, N. Pelekis, H. Karanikas, E. Kotsifakos, I. Kopanakis and Y. Theodoridis "A Pattern Similarity Scheme for Medical Image Retrieval", IEEE Transactions on Information Technology in Biomedicine Journal, 13(4):442-450, July 2009. IEEE CS Press.
  • N. Pelekis, D. K. Iakovidis, E. Kotsifakos and I. Kopanakis "Fuzzy Clustering of Intuitionistic Fuzzy Data", International Journal of Business Intelligence and Data Mining, 3(1), 45-65, 2008.
  • E. Frentzos, K. Gratsias, N. Pelekis and Y. Theodoridis "Algorithms for Nearest Neighbor Search on Moving Object Trajectories", Geoinformatica, 11:159–193, 2007. Springer.
  • I. Kopanakis, S. Karagiannis, N. Pelekis, H. Karanikas "3D Class-Preserving Projection Technique for the representation of N-Dimensional Classified Data and Association Rules", Journal of Universal Computer Science, 2005.
  • N. Pelekis, B. Theodoulidis, I. Kopanakis and Y. Theodoridis "Fuzzy Miner: Extracting Fuzzy Rules from Numerical Patterns", International Journal of Data Warehousing & Mining, 1(1), 57-81, Jan-March 2005.
    Also appears as Chapter 4.30 in Data warehousing and mining : concepts, methodologies, tools and applications. J. Wang (ed), IGI Global, 2008.
  • N. Pelekis, B. Theodoulidis, I. Kopanakis and Y. Theodoridis "Literature Review of Spatio-Temporal Database Models", The Knowledge Engineering Review journal, 19(3), 235-274, 2004.

    • › Chapters in books

  • D. Kopanaki, N. Pelekis and Y. Theodoridis "Systems for privacy-preserving mobility data management", In A. Gkoulalas-Divanis and C. Bettini (ed.) Handbook on Mobile Data Privacy, Springer-Verlag. to appear.
  • G. Marketos, M. L. Damiani, N. Pelekis, Y. Theodoridis, Z. Yan "Trajectory Collection and Reconstruction", In C. Renso, S. Spaccapietra, and E. Zimányi (ed.), Mobility Data: Modeling, Management, and Understanding. Cambridge University Press, 2013, to appear.
  • N. Andrienko, G. Andrienko, N. Pelekis, and S. Spaccapietra "Basic concepts of movement data", In F. Giannotti and D. Pedreschi (eds), Mobility, Data Mining and Privacy, Geographic Knowledge Discovery. Springer, 2008.
  • C. Renso, S. Puntoni, E. Frentzos, A. Mazzoni, B. Moelans, N. Pelekis and F. Pini "Wireless Network Data Sources: Tracking and Synthesizing Trajectories", In F. Giannotti and D. Pedreschi (eds), Mobility, Data Mining and Privacy, Geographic Knowledge Discovery. Springer, 2008.
  • J. Macedo, C. Vangenot, W. Othman, N. Pelekis, E. Frentzos, B. Kuijpers, I. Ntoutsi, S. Spaccapietra and Y. Theodoridis "Trajectory data models", In F. Giannotti and D. Pedreschi (eds), Mobility, Data Mining and Privacy, Geographic Knowledge Discovery. Springer, 2008.
  • E. Frentzos, N. Pelekis, I Ntoutsi and Y. Theodoridis "Trajectory Database Systems", In F. Giannotti and D. Pedreschi (eds), Mobility, Data Mining and Privacy, Geographic Knowledge Discovery. Springer, 2008.
  • N. Pelekis, A. Raffaeta, M.L. Damiani, C. Vangenot, G. Marketos, E. Frentzos, I Ntoutsi and Y. Theodoridis "Towards Trajectory Data Warehouses", In F. Giannotti and D. Pedreschi (eds), Mobility, Data Mining and Privacy, Geographic Knowledge Discovery. Springer, 2008.
  • I. Ntoutsi, N. Pelekis and Y. Theodoridis, "Pattern Comparison in Data Mining: a survey", Research and Trends in Data Mining Technologies and Applications: Advances in Data Warehousing and Mining, Idea Group Publishing, 2007.

    • › Papers in fully refereed Int’l conferences, symposia and workshops

  • [C51] G. A. VOUROS, C. DOULKERIDIS, G. SANTIPANTAKIS, A. VLACHOU, N. PELEKIS, H. GEORGIOU, Y. THEODORIDIS, K. PATROUMPAS, E. ALEVIZOS, A. ARTIKIS, G. FUCHS, M. MOCK, G. ANDRIENKO, N. ANDRIENKO, C. RAY, C. CLARAMUNT, E. CAMOSSI, A.-L. JOUSSELME, D. SCARLATTI, J. MANUEL: “Big Data Analytics for Time Critical Mobility Forecasting: Recent Progress and Research Challenges”, Proceedings of the 21st International Conference on Extending Database Technology (EDBT2018), Vienna, Austria, March 2018. OpenProceedings.
  • [C50] G. A. VOUROS, A. VLACHOU, G. SANTIPANTAKIS, C. DOULKERIDIS, N. PELEKIS, H. GEORGIOU, Y. THEODORIDIS, K. PATROUMPAS, E. ALEVIZOS, A. ARTIKIS, G. FUCHS, M. MOCK, G. ANDRIENKO, N. ANDRIENKO, C. CLARAMUNT, C. RAY, E. CAMOSSI, A.-L. JOUSSELME: “Increasing Maritime Situation Awareness via Trajectory Detection, Enrichment and Recognition of Events”, Proceedings of the 16th International Symposium on Web & Wireless Geographical Information Systems (W2GIS), A Coruña, Spain, May 2018, Springer.
  • [C49] P. TAMPAKIS, N. PELEKIS, N. ANDRIENKO, G. ANDRIENKO, G. FUCHS, Y. THEODORIDIS: “Time-aware Sub-Trajectory Clustering in Hermes@PostgreSQL”, demo paper, Proceedings of the IEEE 34th International Conference on Data Engineering (ICDE), Paris, France, April 2018. IEEE CPS.
  • [C48] F. GRYLLAKIS, N. PELEKIS, C. DOULKERIDIS, S. SIDERIDIS Y. THEODORIDIS: “Spatio-Temporal-Keyword Pattern Queries over Semantic Trajectories with Hermes@Neo4j”, demo paper, Proceedings of the 21st International Conference on Extending Database Technology (EDBT2018), Vienne, Austria, March 2018. OpenProceedings.
  • [C47] E. C. FERNADEZ, J. M. CORDERO, G. VOUROS, N. PELEKIS, T. KRAVARIS, H. GEORGIOU, G. FUCHS, N. ANDRIENKO, G. ANDRIENKO, E. CASADO, D. SCARLATTI, P. COSTAS AND S. AYHAN: “DART: A Machine-Learning Approach to Trajectory Prediction and Demand-Capacity Balancing”, 7th SESAR Innovation Days, 2017. Belgrade, Serbia, 28 – 30, November 2017.
  • [C46] F. GRYLLAKIS, N. PELEKIS, C. DOULKERIDIS, S. SIDERIDIS Y. THEODORIDIS: “Searching for Spatio-Temporal-Keyword Patterns in Semantic Trajectories”, Proceedings of the 16th International Symposium on Intelligent Data Analysis, IDA’17, London, U.K., 2017. Springer.
  • [C45] C. MPAZIOTIS, N. PELEKIS, C. DOULKERIDIS: “DataStories at SemEval-2017 Task 4: Deep LSTM with Attention for Message-level and Topic-based Sentiment Analysis”, Proceedings of the International Workshop on Semantic Evaluation (SemEval), 2017, Vancouver, Canada. Ranked 1st in Task 4 “Sentiment Analysis in Twitter” of SemEval-2017 competition.
  • [C44] C. MPAZIOTIS, N. PELEKIS, C. DOULKERIDIS: “DataStories at SemEval-2017 Task 6: Siamese LSTM with Attention for Humorous Text Comparison”, Proceedings of the International Workshop on Semantic Evaluation (SemEval), 2017, Vancouver, Canada. Ranked 2nd in Task 6 “#HashtagWars: Learning a Sense of Humor” of SemEval-2017 competition.
  • [C43] N. PELEKIS, P. TAMPAKIS, M. VODAS, C. PANAGIOTAKIS, Y. THEODORIDIS, “In-DBMS Sampling-based Sub-trajectory Clustering”, Proceedings of the 20th International Conference on Extending Database Technology (EDBT2017), Venice, Italy, March 2017. OpenProceedings.
  • [C42] D. KOPANAKI, 
 Ν. PELEKIS: “Privacy Preservation of Semantic Trajectory Databases using Query Auditing Techniques”, Proceedings of the 1st International Workshop on Big Geo Data Quality and Privacy (BIGQP @ EDBT/ICDT 2017), Venice, Italy, March 2017. OpenProceedings.
  • [C41] P. NIKITOPOULOS, A.-I. PARASKEVOPOULOS, C. DOULKERIDIS, Ν. PELEKIS, Υ. THEODORIDIS: “BigCAB: Distributed Hot Spot Analysis over Big Spatio-temporal Data using Apache Spark (GIS Cup)”, Proceedings of the 24th Int’l Conference on Advances in Geographic Information Systems, ACM SIGSPATIAL’16, Burlingame, CA, USA, 2016. ACM Press. Third runner-up award.
  • [C40] D. KOPANAKI, 
V. THEODOSSOPOULOS, Ν. PELEKIS, Ι. KOPANAKIS, Υ. THEODORIDIS: “Who Cares about Others’ Privacy: Personalized Anonymization of Moving Object Trajectories”, Proceedings of the 19th International Conference on Extending Database Technology (EDBT2016), Bordeaux, France, March 2016. OpenProceedings.
  • [C39] A. KONSTANTINIDIS, G. CHATZIMILIOUDIS, D. ZEINALIPOUR-YAZTI, P. MPEIS, N. PELEKIS, Y. THEODORIDIS: “Privacy-Preserving Indoor Localization on Smartphones”, ICDE/TKDE Poster, Proceedings of the IEEE 32nd International Conference on Data Engineering (ICDE), Helsinki, Finland, May 2016. IEEE CPS.
  • [C38] N. PELEKIS, S. SIDERIDIS, Y. THEODORIDIS: “Hermessem: a Semantic-aware Framework for the Management and Analysis of our LifeSteps”, Proceedings of the IEEE International Conference on Data Science and Advanced Analytics, IEEE DSAA'2015, Paris, France, October 2015. IEEE CPS.
  • [C37] A. A. SANTOS, A. S. FURTADO, L. O. ALVARES, N. PELEKIS, V. BOGORNY. “Inferring Relationships from Trajectory Data”, Proceedings of the XVI Brazilian Symposium on Geoinformatics, GEOINFO'2015, Campos do Jordao, SP, Brazil, 2015.
  • [C36] C. F. COSTA, M. NASCIMENTO, J. MACEDO, Y. THEODORIDIS, N. PELEKIS AND J. MACHADO. “Optimal Time-dependent Sequenced Route Queries in Road Networks”, Proceedings of the 23rd Int’l Conference on Advances in Geographic Information Systems, ACM SIGSPATIAL’15, Seattle, Washington, USA, November 2015. ACM Press. Best Fast Forward Presentation Runner-Up Award.
  • [C35] ALEVIZOS E., ARTIKIS A., PATROUMPAS K., VODAS M., THEODORIDIS Y. PELEKIS N. “How Not To Drown in a Sea of Information: An Event Recognition Approach”, Proceedings of the IEEE International Conference on Big Data, Santa Clara, CA, USA, 2015.
  • [C34] K. PATROUMPAS, A. ARTIKIS, N. KATZOURIS, M. VODAS, Y. THEODORIDIS, N. PELEKIS, “Event Recognition for Maritime Surveillance”, Proceedings of the 18th Int’l Conference on Extending Database Technology, EDBT’15, Brussels, Belgium, March 2015. Springer.
  • [C33] B. KROGH, N. PELEKIS, Y. THEODORIDIS, K. TORP: “Path-based Queries on Trajectory Data”, Proceedings of the 22nd Int’l Conference on Advances in Geographic Information Systems, ACM SIGSPATIAL’14, Dallas/Fort Worth, TX, USA, November 2014. ACM Press. Best paper award.
  • [C32] R. FILETO, M. KRÜGER, N. PELEKIS, Y. THEODORIDIS, C. RENSO: “Baquara: A Holistic Ontological Framework for Movement Analysis with Linked Data”, Proceedings of the 32nd International Conference on Conceptual Modeling, ER’13, Hong Kong, November 2013. Springer. Best paper award.
  • [C31] B. KROGH, O. ANDERSEN, E. LEWIS-KELHAM, N. PELEKIS, Y. THEODORIDIS, K. TORP: “Trajectory Based Traffic Analysis”, demo paper, Proceedings of the 21st Int’l Conference on Advances in Geographic Information Systems, ACM SIGSPATIAL GIS’13, Orlado, Florida, USA, November 2013. ACM Press.
  • [C30] N. PELEKIS, C. NTRIGKOGIAS, P. TAMPAKIS, S. SIDERIDIS, Y. THEODORIDIS: “Hermoupolis: A Trajectory Generator for Simulating Generalized Mobility Patterns”, demo paper, Proceedings of the European Conference on Machine Learning / Principles and Practice of Knowledge Discovery in Databases, ECML/PKDD'13, Prague, Czech Republic, September 2013. Springer.
  • [C29] E. FRENTZOS, N. PELEKIS, N. GIATRAKOS, Y. THEODORIDIS: “Cost Models for Nearest Neighbor Query Processing over Existentially Uncertain Spatial Data”, Proceedings of the 13th Int’l Symposium on Spatial and Temporal Databases, SSTD’13, Munich, Germany, August 2013. Springer.
  • [C28] A. DOULAMIS, N. PELEKIS, Y. THEODORIDIS: “EasyTracker: An Android Application for Capturing Mobility Behavior”, Proceedings of the 16th Panhellenic Conference on Informatics, special session on “2nd Mobile Device Software Development and Web Development”, MDSD@PCI’12, Piraeus, Greece, October 2012. IEEE CPS.
  • [C27] N. PELEKIS, A. GKOULALAS-DIVANIS, M. VODAS, A. PLEMENOS, D. KOPANAKI, Y. THEODORIDIS: “Private-HERMES: A Benchmark Framework for Privacy-Preserving Mobility Data Querying and Mining Methods”, demo paper, Proceedings of the 15th Int’l Conference on Extending Database Technology, EDBT’12, Berlin, Germany, March 2012. OpenProceedings.
  • [C26] N. PELEKIS, A. GKOULALAS-DIVANIS, M. VODAS, D. KOPANAKI, Y. THEODORIDIS: “Privacy-aware Querying over Sensitive Trajectory Data”, Proceedings of the 20th ACM Conference on Information and Knowledge Management, CIKM’11, Glascow, Scotland - UK, October 2011. ACM Press.
  • [C25] N. PELEKIS, E. STEFANAKIS, I. KOPANAKIS, C. ZOTALI, M. VODAS, Y. THEODORIDIS: “ChoroChronos.org: A GeoPortal for Movement Data and Processes”, poster paper, Proceedings of the 10th Int’l Conference on Spatial Information Theory, COSIT’11, Maine, USA, September 2011.
  • [C24] Z. YAN, N. GIATRAKOS, V. KATSIKAROS, N. PELEKIS, Y. THEODORIDIS: “SeTraStream: Semantic-aware Trajectory Construction over Streaming Movement Data”, Proceedings of the 12th Int’l Symposium on Spatial and Temporal Databases, SSTD’11, Minneapolis, MN, USA, August 2011. Springer.
  • [C23] N. PELEKIS, I. KOPANAKIS, C. PANAGIOTAKIS, Y. THEODORIDIS: “Unsupervised Trajectory Sampling”, Proceedings of the European Conference on Machine Learning / Principles and Practice of Knowledge Discovery in Databases, ECML/PKDD'10, Barcelona, Spain, September 2010. Springer.
  • [C22] L. LEONARDI, G. MARKETOS, E. FRENTZOS, N. GIATRAKOS, S. ORLANDO, N. PELEKIS, A. RAFFAETÀ, A. RONCATO, C. SILVESTRI, Y. THEODORIDIS: “T-Warehouse: Visual OLAP Analysis on Trajectory Data”, demo paper, Proceedings of the 26th IEEE Int’l Conference on Data Engineering, ICDE’10, Long Beach – CA, USA, March 2010. IEEE CS Press.
  • [C21] N. PELEKIS, I. KOPANAKIS, E. KOTSIFAKOS, E. FRENTZOS, Y. THEODORIDIS: “Clustering Trajectories of Moving Objects in an Uncertain World”, Proceedings of the 9th IEEE Int’l Conference on Data Mining, ICDM’09, Miami – FL, USA, December 2009. IEEE CS Press. Best application paper award.
  • [C20] G. KELLARIS, N. PELEKIS, Y. THEODORIDIS: “Trajectory Compression under Network Constraints”, Proceedings of the 11th International Symposium on Spatial and Temporal Databases, SSTD'09, Aalborg, Denmark, July 2009. Springer.
  • [C19] C. PANAGIOTAKIS, N. PELEKIS, AND I. KOPANAKIS: “Trajectory Voting and Classification based on Spatiotemporal Similarity in Moving Object Databases”, Proceedings of the 8th International Symposium on Intelligent Data Analysis, IDA’09, Lyon, France, 2009. Springer.
  • [C18] V. TSIKOLIDAKI, N. PELEKIS, Y. THEODORIDIS: “GF-Miner: A Genetic Fuzzy Classifier for Numerical Data”, Proceedings of the 5th IFIP Conference on Artificial Intelligence Applications & Innovations, AIAI'09, Thessaloniki, Greece, April 2009. Springer.
  • [C17] R. ORTALE, E. RITACCO, N. PELEKIS, R. TRASARTI, G. COSTA, F. GIANNOTTI, G. MANCO, C. RENSO, Y. THEODORIDIS: “The DAEDALUS Framework: Progressive Querying and Mining of Movement Data”, poster paper, Proceedings of the 16th ACM SIGSPATIAL Int’l Conference on Advances in Geographic Information Systems, ACM-GIS'08, Irvine – CA, USA, November 2008. ACM Press.
  • [C16] D. K. IAKOVIDIS, N. PELEKIS, E. KOTSIFAKOS, I. KOPANAKIS: “Intuitionistic Fuzzy Clustering with Applications in Computer Vision”, Proceedings of the International Conference on Advanced Concepts for Intelligent Vision Systems, ACIVS’08, LNCS 5259, pp. 764–774, Juan-les-Pins, France, 2008.
  • [C15] R. ORTALE, E. RITACCO, N. PELEKIS, R. TRASARTI, G. COSTA, F. GIANNOTTI, G. MANCO, C. RENSO, Y. THEODORIDIS: “DAEDALUS: A knowledge discovery analysis framework for movement data”. Proceedings of the 16th Italian Symposium on Advanced Database Systems, SEBD’08, pp. 191-198, Mondello, Italy, 2008.
  • [C14] E. FRENTZOS, N. PELEKIS, Y. THEODORIDIS: “Cost Models and Efficient Query Processing over Existentially Uncertain Spatial Data”, Proceedings of the 12th Pan-Hellenic Conference on Informatics, PCI'08, Samos, Greece, August 2008. IEEE CS Press.
  • [C13] N. PELEKIS, E. FRENTZOS, N. GIATRAKOS, Y. THEODORIDIS: “HERMES: Aggregative LBS via a Trajectory DB Engine”, demo paper, Proceedings of ACM SIGMOD Int’l Conference on Management of Data, SIGMOD’08, Vancouver, BC, Canada, June 2008. ACM Press.
  • [C12] G. MARKETOS, E. FRENTZOS, I. NTOUTSI, N. PELEKIS, A. RAFFAETA, Y. THEODORIDIS: “Building Real World Trajectory Warehouses”, Proceedings of the 7th ACM Int’l Workshop on Data Engineering for Wireless and Mobile Access, MobiDE’08, Vancouver, BC, Canada, June 2008. ACM Press.
  • [C11] N. PELEKIS, I. KOPANAKIS, G. MARKETOS, I. NTOUTSI, G.L. ANDRIENKO, Y. THEODORIDIS: “Similarity Search in Trajectory Databases”, Proceedings of the 14th Int’l Symposium on Temporal Representation and Reasoning, TIME’07, Alicante, Spain, June 2007. IEEE CS Press.
  • [C10] N. PELEKIS, S. VOSINAKIS, T. PANAYIOTOPOULOS, Y. THEODORIDIS: “Towards a Virtual Agent Control Architecture Using a Spatiotemporal Data Management Framework”, Proceedings of the 4th International INTUITION Conference, pp. 153-162, Athens, 2007.
  • [C09] N. PELEKIS, I. KOPANAKIS, I. NTOUTSI, G. MARKETOS, Y. THEODORIDIS: “Mining Trajectory Databases via a Set of Distance Operators”, Proceedings of ICDE Workshop on Spatio-Temporal Data Mining, STDM’07, Istanbul, Turkey, April 2007. IEEE CS Press.
  • [C08] S. VOSINAKIS, N. PELEKIS, Y. THEODORIDIS, AND T. PANAYIOTOPOULOS: “Handling Spatial Vagueness in Virtual Agent Control”. Proceedings of the 2nd International Conference on Computer Graphics Theory and Applications, GRAPP’07, Barcelona, Spain, March 2007. Volume GM/R. INSTICC.
  • [C07] D. K. IAKOVIDIS, N. PELEKIS, H. KARANIKAS, E. KOTSIFAKOS, I. KOPANAKIS, Y. THEODORIDIS: “A Pattern Similarity Scheme for Medical Image Retrieval”, Proceedings of the Int’l Special Topic Conference on Information Technology in Biomedicine, ITAB’06, Ioannina, Greece, October 2006. IEEE Computer Society Press.
  • [C06] H. KARANIKAS, N. PELEKIS, D. K. IAKOVIDIS, I. KOPANAKIS, T. MAVROUDAKIS, Y. THEODORIDIS: “MetaOn - Ontology Driven Metadata Construction and Management for Intelligent Search in Text and Image Collections”, Proceedings of Int’l Workshop on Flexible Database and Information System Technology, FlexDBIST’06, Krakow, Poland, September 2006. IEEE Computer Society Press.
  • [C05] N. PELEKIS, Y. THEODORIDIS: “Boosting Location-Based Services with a Moving Object Database Engine”, Proceedings of the 5th Int’l ACM Workshop on Data Engineering for Wireless and Mobile Access, MobiDE'06, Chicago, IL, USA, June 2006. ACM Press.
  • [C04] N. PELEKIS, Y. THEODORIDIS, S. VOSINAKIS, T. PANAYIOTOPOULOS: “Hermes – A Framework for Location-Based Data Management”, demo paper, Proceedings of the 10th Int’l Conference on Extending Database Technology, EDBT'06, Munich, Germany, March 2006. OpenProceedings.
  • [C03] I. KOPANAKIS, S. KARAGIANNIS, N. PELEKIS, H. KARANIKAS: “3D Class-Preserving Projection Technique for the representation of N-Dimensional Classified Data and Association Rules”. Proceedings of the 5th International Conference on Knowledge Management, I-KNOW’05, Special Track on «Knowledge and Information Visualisation», Graz, Austria, June 29-July 1, 2005. Journal of Universal Computer Science.
  • [C02] E. FRENTZOS, K. GRATSIAS, N. PELEKIS, Y. THEODORIDIS: “Nearest Neighbor Search on Moving Object Trajectories”, Proceedings of the 9th Int’l Symposium on Spatial and Temporal Databases, SSTD'05, Angra dos Reis, Brazil, August 2005. Springer.
  • [C01] N. PELEKIS, B. THEODOULIDIS AND I. KOPANAKIS: “Fuzzy Miner: A Fuzzy System for Solving Pattern Classification Problems”, Proceedings of the 1st Int’l EDBT Workshop on Pattern Representation and Management, PaRMa’04, Heraklion-Crete, Greece, March, 2004. OpenProceedings.

    • › Abstracts, Greek Conferences

  • A. Konstantinidis, G. Chatzililioudis, D. Zeinalipour-Yazti, P. Mpeis, N. Pelekis and Y. Theodoridis "Privacy-Preserving Indoor Localization on Smartphones", Proceedings of the 14th Hellenic Data Management Symposium, HDMS’16, Athens, Greece, 2016.
  • D. Kopanaki, N. Pelekis, A. Gkoulalas-Divanis, M. Vodas and Y. Theodoridis "A Framework for Mobility Pattern Mining and Privacy-Aware Querying of Trajectory Data", Proceedings of the 11th Hellenic Data Management Symposium, HDMS’12, Chania, Greece, 2012.
  • N. Pelekis, I. Kopanakis, C. Panagiotakis and Y. Theodoridis "Unsupervised Trajectory Sampling", Proceedings of the 10th Hellenic Data Management Symposium HDMS’11, Athens, Greece, 2011.
  • N. Pelekis, I. Kopanakis, E. Kotsifakos, E. Frentzos and Y. Theodoridis "Clustering Trajectories of Moving Objects in an Uncertain World", In the Proceedings of the 9th Hellenic Data Management Symposium (HDMS’10), Ayia Napa, Cyprus, 2010.
  • G. Marketos, E. Frentzos, N. Giatrakos, I. Ntoutsi, N. Pelekis, A. Raffaeta and Y. Theodoridis "A Framework for Trajectory Data Warehousing", In the Proceedings of the 7th Hellenic Data Management Symposium (HDMS’08), Heraklion, Crete, Greece, 2008.
  • E. Frentzos, N. Pelekis and Y. Theodoridis "Cost Models and Efficient Query Processing over Existentially Uncertain Spatial Data", In the Proceedings of the 12th Panhellenic Conference in Informatics (PCI’08), Samos, Greece, 2008.
  • E. Fanara, G. Marketos, N. Pelekis and Y. Theodoridis "Analyzing Polls and News Headlines Using Business Intelligence Techniques", In the Proceedings of the 20th National Conference of the Hellenic Company of Operational Research (EEEE’08), Spetses, Greece, 2008.
  • N. Pelekis, D. K. Iakovidis, E. Kotsifakos, H. Karanikas and I. Kopanakis "Intuitionistic Fuzzy Clustering to Information Retrieval from Cultural Databases", In the Proceedings of the 22nd International Conference on Operational Research, Prague, Czech Republic, 2007.
  • D. K. Iakovidis, E. Kotsifakos, N. Pelekis, H. Karanikas, I. Kopanakis, Thomas Mavroudakis and Y. Theodoridis "Pattern-Based Retrieval of Cultural Heritage Images", In the Proceedings of the 11th Panhellenic Conference in Informatics (PCI‘07), Rio, Greece, 2007.
  • H. Karanikas, N. Pelekis, D. Iakovidis, I. Kopanakis, T. Mavroudakis and Y. Theodoridis "Multimedia Annotation System for Intelligent Search", In the Proceedings of the International Conference on Telecommunications & Multimedia (TEMU’06), Heraklion-Crete, Greece, 2006.
  • I. Kopanakis , S. Karagiannis, N. Pelekis, H. Karanikas "Bar Chart Form Visual Data Mining Model for the Representation of Association Rules", In the Proceedings of the International Conference on Telecommunications & Multimedia (TEMU’05), Heraclion, Crete. Greece, 2005.
  • I. Kopanakis, N. Pelekis, H. Karanikas, T. Mavroudakis "Visual Techniques for the Interpretation of Data Mining Outcomes", In the Proceedings of the 10th Panhellenic Conference in Informatics (PCI‘05), LNCS 3746, pp. 25-35, Volos, Greece, 2005.
  • H. Karanikas, N. Pelekis, I. Kopanakis, T. Mavroudakis "Discovering Market Trends via Text Mining", In the Proceedings of the Scientific Congress “New Technologies & Marketing”, pp.131-138, Ierapetra, Greece, 2005.

    • › Other

  • [Ο05] C. DOULKERIDIS, N. PELEKIS, Y. THEODORIDIS, G. VOUROS: “Big Data Management and Analytics for Mobility Forecasting in datAcron”, EuroPro: Big Data Management Challenges and Solutions in the Context of European Projects workshop organized in conjunction with the 20th Int'l Conf. on Extending Database Technology (EDBT), Venice, Italy, 2017.
  • [Ο04] A. CHRISTODOULAKIS, H. KARANIKAS,
A. BILLIRIS, E. THIREOS, N. PELEKIS: “Big data in health care - Assessment of the performance of Greek NHS hospitals using key performance and clinical workload indicators”, Archives of Hellenic Medicine, 33:1-9, 2016.
  • [Ο03] N. PELEKIS, S. SIDERIDIS, P. TAMPAKIS, Y. THEODORIDIS: “Hermoupolis: A Semantic Trajectory Generator in the Data Science era”, The SIGSPATIAL Special Newsletter of the Association for Computing Machinery, Special Interest Group on Spatial Information, Vol. 7, Number 1, March 2015.
  • [Ο02] M. VODAS, N. PELEKIS, Y. THEODORIDIS, C. RAY, V. KARKALETSIS, S. PETRIDIS, A. MILIOU: “Efficient AIS Data Processing for Environmentally Safe Shipping”, SPOUDAI, Journal of Economics and Business, Vol.63, Issue 3, 2013.
  • [Ο01] Β. ΒΕΡΥΚΙΟΣ, Α. ΓΚΟΥΛΑΛΑΣ-ΔΙΒΑΝΗΣ, Ι. ΘΕΟΔΩΡΙΔΗΣ, Ν. ΠΕΛΕΚΗΣ: “Μέθοδοι Προστασίας Ιδιωτικότητας σε Τροχιές Κινούμενων Αντικειμένων”, στο συλλογικό τόμο «Προστασία της Ιδιωτικότητας και Τεχνολογίες Πληροφορικής και Επικοινωνιών. Επιμ. έκδοσης: Κ. Λαμπρινουδάκης κ.α., Εκδόσεις Παπασωτηρίου, 2010.