Publications

2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 2002

2015

• Renato Fileto, Cleto May, Chiara Renso, Nikos Pelekis, Douglas Klein, Yannis Theodoridis. The Baquara2 knowledge-based framework for semantic enrichment and analysis of movement data. Data Knowl. Eng. 98: 104-122 (2015).
• K. Nikos Pelekis, Stylianos Sideridis, Panagiotis Tampakis, Yannis Theodoridis. Hermoupolis: a semantic trajectory generator in the data science era. SIGSPATIAL Special 7(1): 19-26 (2015).
• Andreas Konstantinidis, Georgios Chatzimilioudis, Demetrios Zeinalipour-Yazti, Paschalis Mpeis, Nikos Pelekis, Yannis Theodoridis. Privacy-Preserving Indoor Localization on Smartphones. IEEE Trans. Knowl. Data Eng. 27(11): 3042-3055 (2015).
• 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”, IEEE International Conference on Big Data (2015).
• N. Pelekis, S. Sideridis, Y. Theodoridis. “Hermessem: a Semantic-aware Framework for the Management and Analysis of our LifeSteps”, IEEE International Conference on Data Science and Advanced Analytics (IEEE DSAA’2015).
• C. F. Costa, M. Nascimento, J. Macedo, Y. Theodoridis, N. Pelekis and J. Machado. “Optimal Time-dependent Sequenced Route Queries in Road Networks”, SIGSPATIAL/GIS 2015. (Best Fast Forward Presentation Runner-Up Award).
• K. Patroumpas, A. Artikis, N. Katzouris, M. Vodas, Y. Theodoridis, and N. Pelekis. Event Recognition for Maritime Surveillance. Proc. 18th Int’l Conference on Extending Database Technology (EDBT), Brussels, Belgium, March 2015.
• N. Pelekis, E. Frentzos, N. Giatrakos, Y. Theodoridis. HERMES: A Trajectory DB Engine for Mobility-Centric Applications. Int’l Journal of Knowledge-based Organizations (IJKBO), 5(3), 2015.

2014

• Nikos Pelekis, Yannis Theodoridis. Mobility Data Management and Exploration. Springer 2014, ISBN 978-1-4939-0391-7, pp. 1-298.
• Benjamin B. Krogh, Nikos Pelekis, Yannis Theodoridis, Kristian Torp. Path-based queries on trajectory data. SIGSPATIAL/GIS 2014: 341-350 (best paper award).
• N. Pelekis, E. Frentzos, N. Giatrakos, Y. Theodoridis. On the Support of Mobility in ORDBMS. Int’l Journal of Knowledge-based Organizations, 4(1), 2014.

2013

• B. Krogh, O. Andersen, E. Lewis-Kelham, N. Pelekis, Y. Theodoridis, K. Torp. “Trajectory Based Traffic Analysis”, demo paper, Proc. 21st ACM SIGSPATIAL Int’l Conference on Advances in Geographic Information Systems, GIS’13, Orlando – Florida, USA, November 2013.
• R. Fileto, M. Krüger, N. Pelekis, Y. Theodoridis, C. Renso. “Baquara: A Holistic Ontological Framework for Movement Analysis with Linked Data”, Proc. 32nd Int’l Conference on Conceptual Modeling, ER’13, Hong Kong, November 2013. Best paper award.
• N. Giatrakos, Y. Kotidis, A. Deligiannakis, V. Vassalos, Y. Theodoridis. “In-Network Approximate Computation of Outliers with Quality Guarantees”, Information Systems, 38(8):1285-1308, November 2013.
• G. Marketos, M. L. Damiani, N. Pelekis, Y. Theodoridis, Z. Yan. “Trajectory Collection and Reconstruction”, in C. Renso, S. Spaccapietra, and E. Zimányi (eds.) Mobility Data: Modeling, Management, and Understanding, Cambridge University Press, October 2013. ISBN: 9781107021716.
• M. Spiliopoulou, E. Ntoutsi, Y. Theodoridis, R. Schult. “MONIC and Followups on Modeling and Monitoring Cluster Transitions”, nectar track, Proc. European Conference on Machine Learning / Principles and Practice of Knowledge Discovery in Databases, ECML/PKDD’13, Prague, Czech Republic, September 2013.
• N. Pelekis, C. Ntrigkogias, P. Tampakis, S. Sideridis, Y. Theodoridis. “Hermoupolis: A Trajectory Generator for Simulating Generalized Mobility Patterns”, demo paper, Proc. European Conference on Machine Learning / Principles and Practice of Knowledge Discovery in Databases, ECML/PKDD’13, Prague, Czech Republic, September 2013.
• E. Frentzos, N. Pelekis, N. Giatrakos, Y. Theodoridis. “Cost Models for Nearest Neighbor Query Processing over Existentially Uncertain Spatial Data”, Proc. 13th Int’l Symposium on Spatial and Temporal Databases, SSTD’13, Munich, Germany, August 2013.
• 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), August 2013.
• G. Kellaris, N. Pelekis, Y. Theodoridis. Map-Matched Trajectory Compression. Journal of Systems and Software, 86(6): 1566-1579, June 2013.

2012

• A. Doulamis, N. Pelekis, Y. Theodoridis. “EasyTracker: An Android Application for Capturing Mobility Behavior”, Proc. 16th Panhellenic Conference on Informatics, special session on “2nd Mobile Device Software Development and Web Development”, MDSD@PCI’12, Piraeus, Greece, October 2012.
• Ntoutsi, M. Spiliopoulou, Y. Theodoridis. “FINGERPRINT – Summarizing Cluster Evolution in Dynamic Environments”, Int’l Journal of Data Warehousing and Mining (IJDWM), 8(3):27-45, July-September 2012.
• 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.
• D. Kopanaki, N. Pelekis, A. Gkoulalas-Divanis, M. Vodas, A. Plemenos, Y. Theodoridis. A Framework for Mobility Pattern Mining and PrivacyAware Querying of Trajectory Data. Proc. 11th Hellenic Data Management Symposium (HDMS’12), Chania, Greece, June 2012.
• 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), April 2012.
• 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. Proc. 15th International Conference on Extending Database Technology, (EDBT’12), Berlin, Germany, March 2012.

2011

• N. Pelekis, A. Gkoulalas-Divanis, M. Vodas, D. Kopanaki, Y. Theodoridis. Privacy-aware querying over sensitive trajectory data. Proc. 20th ACM International Conference on Information and Knowledge Management, (CIKM’11), Glasgow, Scotland, UK, October 2011.
• N. Pelekis, E. Stefanakis, I. Kopanakis, C. Zotali, M. Vodas, Y. Theodoridis. “ChoroChronos.org: A GeoPortal for Movement Data and Processes”, poster paper, Proc. 10th Int’l Conference on Spatial Information Theory, COSIT’11, Maine, USA, September 2011.
• S. Sioutas, K. Tsichlas, Y. Manolopoulos, Y. Theodoridis. “NEFOS: Rapid Cache-Aware Range Query Processing with Probabilistic Guarantees”, Proc. 22nd Int’l Conference on Database and Expert Systems Applications, DEXA’11, Toulouse, France, August 2011.
• Z. Yan, N. Giatrakos, V. Katsikaros, N. Pelekis, Y. Theodoridis. “SeTraStream: Semantic-aware Trajectory Construction over Streaming Movement Data”, Proc. 12th Int’l Symposium on Spatial and Temporal Databases, SSTD’11, Minneapolis, MN, USA, August 2011.
• N. Pelekis, I. Kopanakis, E.E. Kotsifakos, E. Frentzos, Y. Theodoridis. “Clustering Uncertain Trajectories”, Knowledge and Information Systems (KAIS), 28(1):117-147, July 2011.
• I. Ntoutsi. M. Spiliopoulou, Y. Theodoridis. “Summarizing Cluster Evolution in Dynamic Environments”, Proc. 11th Int’l Conference on Computational Science and its Applications, ICSSA’11, Santander, Spain, June 2011.
• A. Raffaeta, 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 and Mining (IJDWM), 7(1), January 2011.

2010

• N. Pelekis, I. Kopanakis, C. Panagiotakis, Y. Theodoridis. “Unsupervised Trajectory Sampling”, Proc. European Conference on Machine Learning / Principles and Practice of Knowledge Discovery in Databases, ECML/PKDD’10, Barcelona, Spain, September 2010.
• N. Giatrakos, Y. Kotidis, A. Deligiannakis, V. Vassalos, Y. Theodoridis. “TACO: Tunable Approximate Computation of Outliers in Wireless Sensor Networks”, Proc. ACM SIGMOD Int’l Conference on Management of Data, Indianapolis, IN, USA, June 2010.
• G. Marketos, Y. Theodoridis: “Ad-hoc OLAP on Trajectory Data”. Proc. 11th International Conference on Mobile Data Management (MDM’10), Kansas City, Missouri, USA, May 2010.
• L. Leonardi, G. Marketos, E. Frentzos, N. Giatrakos, S. Orlando, N. Pelekis, A. Raffaeta, A. Roncato, C. Silvestri, Y. Theodoridis: “T-Warehouse: Visual OLAP Analysis on Trajectory Data”, Proc. 26th International Conference on Data Engineering (ICDE’10), Los Angeles, USA, March 2010.

2009

• N. Pelekis, I. Kopanakis, E. Kotsifakos, E. Frentzos and Y. Theodoridis: “Clustering Trajectories of Moving Objects in an Uncertain World”, (ICDM’09), Maimi, USA, December 2009. Best Application Paper Award.
• G. Marketos, Y. Theodoridis: “Mobility Data Warehousing and Mining”, Proc. 35th International Conference on Very Large Data Bases PhD Workshop (VLDB’09), Lyon, France, August 2009.
• G. Kellaris, N. Pelekis and Y. Theodoridis. Trajectory Compression under Network Constraints. Proc. 11th International Symposium on Spatial and Temporal Databases (SSTD’09), Aalborg, Denmark, July 2009.
• D.K. Iakovidis, N. Pelekis, E.E. Kotsifakos, I. Kopanakis, H. Karanikas, Y. Theodoridis. “A Pattern Similarity Scheme for Medical Image Retrieval”, IEEE Transactions on Information Technology in Biomedicine, 13(4):442-450, July 2009.
• Ε. Frentzos, K. Gratsias and Y. Theodoridis. On the Effect of Location Uncertainty in Spatial Querying, IEEE Transactions on Knowledge and Data Engineering, 21(3), March 2009.
• N. Pelekis, I. Kopanakis, E. Kotsifakos, E. Frentzos and Y. Theodoridis: “Clustering and Representing Movements in an Uncertain World”, UNIPI-ISL-TR-2009-01, Technical Report Series, U. Piraeus, 2009.
• Ntoutsi, M. Spiliopoulou, Y. Theodoridis. “Tracing Cluster Transitions for Different Cluster Types”, Control & Cybernetics, 38(1):239-260, January 2009.

2008

• S. Mantadakis, G. Marketos, Y. Theodoridis: “Analysis and Visualization of Moving Object Trajectories – The Trajectory Surfer Tool”. Proc. 5th Panhellenic Conference HellasGIs (HGIS’08), Athens, Greece, December 2008.
• E. E. Kotsifakos, I. Ntoutsi, Y. Vrahoritis, Y. Theodoridis. Monitoring Patterns through an Integrated Management and Mining Tool (Demo).Proc. of Machine Learning and Knowledge Discovery in Databases, European Conference (ECML/PKDD’08), Antwerp, Belgium, 2008.
• E. E. Kotsifakos, I. Ntoutsi, Y. Vrahoritis, Y. Theodoridis. PATTERN-MINER: Integrated Management and Mining over Data Mining Models (Demo).Proc. of 14th ACM SIGKDD Int. Conf. on Knowledge Discovery and Data Mining (KDD’08), Las Vegas, USA, 2008
• G. Marketos, E. Frentzos, N. Giatrakos, I Ntoutsi, N. Pelekis, A. Raffaeta, Y. Theodoridis: “A Framework for Trajectory Data Warehousing”. Proc. 7th Hellenic Data Management Symposium (HDMS’08), Heraklion, Greece, July 2008.
• G. Marketos, E. Frentzos, I Ntoutsi, N. Pelekis, A. Raffaeta, Y. Theodoridis: “Building Real World Trajectory Warehouses”. Proc. 7th International ACM SIGMOD Workshop on Data Engineering for Wireless and Mobile Access (MobiDE’08), Vancouver, Canada, June 2008.
• N. Pelekis, E. Frentzos, N. Giatrakos, Y. Theodoridis: “HERMES: Aggregative LBS via a Trajectory DB Engine”. Proc. ACM SIGMOD Conference (SIGMOD’08), Vancouver, Canada, June 2008
• N. Pelekis, D.K. Iakovidis, E.E. Kotsifakos, and I. Kopanakis. Fuzzy Clustering of Intuitionistic Fuzzy Data. International Journal of Business Intelligence and Data Mining (IJBIDM), 3(1):45-65, April 2008.
• I. Ntoutsi, N. Mitsou, G. Marketos “Traffic mining in a road-network: How does the traffic flow?”, International Journal of Business Intelligence and Data Mining (IJBIDM), 3(1):82-98, April 2008.
• G. Marketos, Y. Theodoridis, I. S. Kalogeras. Seismological Data Warehousing and Mining – A survey. International Journal of Data Warehousing and Mining, 4(1):1-16, January-March 2008.
• Ε. Frentzos, N. Pelekis and Y. Theodoridis. Cost Models and Efficient Query Processing over Existentially Uncertain Spatial Data, 12th Panhellenic Conference on Informatics (PCI’08), Samos, Greece.
• E. Frentzos, N. Pelekis, N. Giatrakos, Y. Theodoridis: “Identifying Unknown Border Lines from Historical Spatiotemporal Data: The DIACHORON Approach”. International Conference on Telecommunications and Multimedia (TEMU’08), Ierapetra, Crete, 2008.
• E. Fanara, G. Marketos, N. Pelekis, Y. Theodoridis: “Analyzing Polls and News Headlines Using Business Intelligence Techniques”. Proc. 20th National Conference of Hellenic Operational Research Society (EEEE’08), Spetses, Greece, June 2008.
• Frentzos, E., Pelekis, N., and Theodoridis, Y. Cost Models and Efficient Query Processing over Existentially Uncertain Spatial Data, UNIPI-ISL-TR-2008-01, Technical Report Series, University of Piraeus, 2008.

2007

• E. Frentzos, K. Gratsias, N. Pelekis, Y. Theodoridis. Algorithms for Nearest Neighbor Search on Moving Object Trajectories. GeoInformatica, 11:159–193, June 2007.
• E. Frentzos and Y. Theodoridis. On the effect of Trajectory Compression in Spatiotemporal Querying. Proc. 11 East-European Conference on Advances in Databases and Information Systems (ADBIS’07), Varna, Bulgaria.
• N. Pelekis, S. Vosinakis, T. Panayiotopoulos and Y. Theodoridis. Towards a Virtual Agent Control Architecture Using a Spatiotemporal Data Management Framework. Proc. of the 4th International INTUITION Conference (INTUITION’07), pp. 153-162, Athens, 2007.
• N. Pelekis, I. Kopanakis, I. Ntoutsi, G. Marketos, G. Andrienko and Y. Theodoridis. Similarity Search in Trajectory Databases. Proc. of the 14th IEEE International Symposium on Temporal Representation and Reasoning (TIME’07), Alicante, Spain, 2007.
• E. Frentzos, K. Gratsias, Y. Theodoridis. Index-based Most Similar Trajectory Search. Proc. 23rd International Conference on Data Engineering (ICDE’07), Istanbul, Turkey, April 2007.
• E. Frentzos, K. Gratsias and Y. Theodoridis. Implementing the Next Generation of Location Based Services, Proc. 8th Pan-Hellenic Geographical Conference, Working group on Geographic Data in the World Wide Web, Athens, Greece, October 2007.
• E. Frentzos, K. Gratsias and Y. Theodoridis. Towards the Next Generation of Location-based Services, Proc. 7th International Workshop on Web and Wireless Geographical Information Systems (W2GIS’07) 2007, Wales, UK, November 2007.
• S. Vosinakis, N. Pelekis, Y. Theodoridis and T. Panayiotopoulos. Handling Spatial Vagueness in Virtual Agent Control. Proc. of the 2nd International Conference on Computer Graphics Theory and Applications (GRAPP’07), Barcelona, Spain, 2007.
• N. Pelekis, I. Kopanakis, I. Ntoutsi, G. Marketos and Y. Theodoridis. Mining Trajectory Databases via a Suite of Distance Operators. Proc. of the IEEE ICDE workshop on Spatio-Temporal Data Mining (STDM’07), Istanbul, Turkey, 2007.
• N.Pelekis, D.Iakovidis, E.E.Kotsifakos, H.Karanikas, I.Kopanakis. Intuitionistic Fuzzy Clustering to Information Retrieval from Cultural Databases.22nd European Conference on Operational Research (EURO XXII’07), Prague, 2007
• G. Marketos, E. Kotsifakos and Y. Theodoridis. Rethinking Decision Making: Measuring and Managing Performance. Proc. Pan-Hellenic Conference on New Technologies and Marketing (NTMarketing’07), Ierapetra, Crete, May 2007.
• D.Iakovidis, E.E.Kotsifakos, N.Pelekis, H.Karanikas, I.Kopanakis and Y.Theodoridis. Pattern-Based Retrieval of Cultural Heritage Images.11th Panhellenic Conference on Informatics (PCI’07), Patras, Greece, 2007
• 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, 2007.
• 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, 2007.
• 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, 2007.
• 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, 2007.
• N. Pelekis, A. Raffaeta, M.L. Damiani, C. Vangenot, G. Marketos, E. Frentzos, I Ntoutsi, Y. Theodoridis. Towards Trajectory Data Warehouses. In F. Giannotti and D. Pedreschi (eds.) Mobility, Data Mining and Privacy, Geographic Knowledge Discovery, Springer, 2007.
• E. Kotsifakos, G. Marketos, Y. Theodoridis. A framework for integrating ontologies and pattern-bases. Chapter 12 in H.O. Nigro, S.G. Cisaro and D. Xodo (eds.) Data Mining with Ontologies: Implementations, Findings, and Frameworks, IDEA Group, 2007.
• N. Pelekis, Y. Theodoridis. An Oracle Data Cartridge for Moving Objects. UNIPI-ISL-TR-2007-04, Technical Report Series, Information Systems Lab., University of Piraeus, Piraeus, Hellas, December 2007.
• I. Ntoutsi, Y. Theodoridis. The notion of patterns in Data Mining. UNIPI-ISL-TR-2007-02, Technical Report Series, Information Systems Lab., University of Piraeus, Piraeus, Hellas, March 2007.
• I. Ntoutsi, Y. Theodoridis. Pattern Management. UNIPI-ISL-TR-2007-01, Technical Report Series, Information Systems Lab., University of Piraeus, Piraeus, Hellas, March 2007.
• M. Spiliopoulou, I. Ntoutsi, Y. Theodoridis. Tracing Cluster Transitions for Different Cluster Types. UNIPI-ISL-TR-2007-03, Technical Report Series, Information Systems Lab., University of Piraeus, Piraeus, Hellas, July 2007.

2006

• A. Corral, Y. Manolopoulos, Y. Theodoridis, M. Vassilakopoulos. Cost Models for Distance Joins Queries using R-trees. Data and Knowledge Engineering, 57(1):1-36, April 2006.
• A. Nanopoulos, Y. Theodoridis, Y. Manolopoulos. Indexed-based Density Biased Sampling for Clustering Applications. Data and Knowledge Engineering, 57(1):37-63, April 2006.
• N. Pelekis, Y. Theodoridis. Boosting Location-Based Services with a Moving Object Database Engine. Proc. 5th International ACM SIGMOD Workshop on Data Engineering for Wireless and Mobile Access (MobiDE’06), Chicago, USA, June 2006.
• N. Pelekis, Y. Theodoridis, S. Vosinakhs and T. Panayiotopoulos. Hermes – A Framework for Location-Based Data Management. Proc. 10th International Conference on Extending Database Technology (EDBT’06), Munich, Germany, March 2006.
• G. Marketos, Y. Theodoridis. Measuring Performance in the Retail Industry. Proc. Workshop on Business Process Intelligence (BPI’06), Vienna, Austria, September 2006. Advances in Informatics – Springer-Verlag LNCS #4103, 2006.
• D.K.Iakovidis, N.Pelekis, H.Karanikas, E.E.Kotsifakos, I.Kopanakis, Y.Theodoridis A Pattern Similarity Scheme for Medical Image Retrieval. Proc of the 7th Annual IEEE Conf on International Technology Applications in Biomedicine (ITAB’06), Ioannina, Greece
• M. Spiliopoulou, I. Ntoutsi, Y. Theodoridis and R. Schult The MONIC framework for Cluster Transition Detection, 5th Hellenic Data Management Symposium (HDMS’06), Thessaloniki, Greece, 2006.
• M. Spiliopoulou, I. Ntoutsi, Y. Theodoridis and R. Schult MONIC – Modeling and Monitoring Cluster Transitions, 12th ACM SIGKDD Int. Conf. on Knowledge Discovery and Data Mining (KDD’06), Philadelphia, USA, 2006
• E. Frentzos, K. Gratsias, Y. Theodoridis. Index-based Most Similar Trajectory Search. UNIPI-ISL-TR-2006-01, Technical Report Series, Information Systems Lab., University of Piraeus, Piraeus, Hellas, November 2006.

2005

• N. Mamoulis, Y. Theodoridis, D. Papadias. Spatial Joins: Algorithms, Cost Models and Optimization. Chapter 7 in Y. Manolopoulos et al. (eds.) Spatial Databases – Technologies, Techniques and Trends, IDEA Group, 2005.
• N. Pelekis, B. Theodoulidis, I. Kopanakis, Y. Theodoridis. Fuzzy Miner: Extracting Fuzzy Rules from Numerical Patterns. Int’l Journal of Data Warehousing and Mining, 1(1):57-81, January-March 2005.
• E. Frentzos, K. Gratsias, N. Pelekis, Y. Theodoridis. Nearest Neighbor Search on Moving Object Trajectories. Proc. 9th International Symposium on Spatial and Temporal Databases (SSTD’05), Angra dos Reis, Brazil, August 2005.
• K. Gratsias, E. Frentzos, V. Delis, Y. Theodoridis. Towards a Taxonomy of Location Based Services. Proc. 5th International Workshop on Web and Wireless Geographical Information Systems (W2GIS’05), Lausanne, Switzerland, December 2005
• G. Marketos, K. Pediaditakis, Y. Theodoridis, and B. Theodoulidis.: Intelligent Stock Market Assistant using Temporal Data Mining. Proc. 10th Panhellenic Conference in Informatics (PCI’05), Volos, Greece, November 2005.
• E. Kotsifakos, I. Ntoutsi and Y. Theodoridis. Database Support for Data Mining Patterns. Proc. 10th Panhellenic Conference on Informatics (PCI’05), Volos, Greece, November 2005. Advances in Informatics – Springer-Verlag LNCS #3746, 2005. Springer LNCS
• E. Frentzos, K. Gratsias, N. Pelekis, Y. Theodoridis. Nearest Neighbor Search on Moving Object Trajectories. UNIPI-ISL-TR-2005-02, Technical Report Series, Information Systems Lab., University of Piraeus, Piraeus, Hellas, April 2005.

2004

• N. Pelekis, B. Theodoulidis, I. Kopanakis, Y. Theodoridis. Literature Review of Spatio-Temporal Database Models. Knowledge Engineering Review, 19(3), 235-274, 2004.
• A. Corral, Y. Manolopoulos, Y. Theodoridis, M. Vassilakopoulos. Multi-way Distance Join Queries in Spatial Databases. Geoinformatica, 8(4):373-402, December 2004.
• A. Corral, Y. Manolopoulos, Y. Theodoridis, M. Vassilakopoulos. Algorithms for Processing K-Closest Pair Queries in Spatial Databases. Data and Knowledge Engineering, 49(1), April 2004.
• V. S. Verykios, E. Bertino, I. N. Fovino, L. Parasility Provenza, Y. Saygin, Y. Theodoridis. State-of-the-art in Privacy Preserving Data Mining. ACM SIGMOD Record, 33(1), March 2004.
• Y. Theodoridis, G. Marketos, I. S. Kalogeras. Collecting and Mining Seismic Data in Greek Territory – The Seismo-Surfer Tool. Proc. 7th Panhellenic Geographical Conference of the Hellenic Geographical Association (HGA’04), Mytilene, Lesvos, Greece, October 2004.
• I. S. Kalogeras, G. Marketos, Y. Theodoridis. A Tool for Collecting, Querying, and Mining Macroseismic Data. Proc. 10th International Congress of the Geological Society of Greece (GSG’04), Thessaloniki, Greece, April 2004. (Also, in Bulletin of the Geological Society of Greece, vol. XXXVI, 2004.)
• N. Pelekis, B. Theodoulidis, I. Kopanakis. Fuzzy Miner: A Fuzzy System for Solving Pattern Classification Problems. Proc. 1st International Workshop on Pattern Representation and Management (PaRMa’04), Heraklion, Crete, Greece, April 2004.
• E. D. Pontikakis, A. A. Tsitsonis, V. S. Verykios, Y. Theodoridis, L. Chang. A Quantitative and Qualitative Analysis of Blocking in Association Rule Hiding. Proc. 3rd Workshop on Privacy in the Electronic Society (WPES’04), Washington, DC, USA, December 2004.
• I. Bartolini, P. Ciaccia, I. Ntoutsi, M. Patella, Y. Theodoridis. A Unified and Flexible Framework for Comparing Simple and Complex Patterns. Proc. 8th European Conference on Principles and Practice of Knowledge Discovery in Databases (PKDD’04), Pisa, Italy, September 2004.
• I. Ntoutsi. The Notion of Similarity in Data and Pattern Spaces. Proc. 1st International Workshop on Pattern Representation and Management (PaRMa’04), Heraklion, Crete, Greece, April 2004.

2003

• Y. Theodoridis. SEISMO-SURFER: A Prototype for Collecting, Querying, and Mining Seismic Data. In Y. Manolopoulos et al. (eds.) Advances in Informatics – Revised Selected Papers from the 8th Panhellenic Conference on Informatics, Springer-Verlag LNCS #2563, 2003.
• Y. Theodoridis. Ten Benchmark Database Queries for Location-based Services. The Computer Journal, 46(6):713-725, October 2003.
• E. Frentzos. Indexing Objects Moving on Fixed Networks. Proc. 8th International Symposium on Spatial and Temporal Databases (SSTD’03), Dresden, Germany, September 2003.
• A. Corral, Y. Manolopoulos, Y. Theodoridis, M. Vassilakopoulos. Distance Join Queries of Multiple Inputs in Spatial Databases. Proc. 7th East-European Conference on Advances in Databases and Information Systems (ADBIS’03), Dresden, Germany, September 2003.

2002

• A. Nanopoulos, Y. Theodoridis, Y. Manolopoulos. An Efficient and Effective Algorithm for Density Biased Sampling. Proc. 11th Int’l Conference on Information and Knowledge Management (CIKM’02), McLean – VA, USA, November 2002.