1 Christos Doulkeridis Processing Joins over Big Data in MapReduce 12th Hellenic Data Management Symposium (HDMS'14) ./presentations/hdms14tut.pdf 1 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg, Yannis Kotidis Peer-to-Peer Query Processing over Multidimensional Data Springer, ISBN-10: 1461421098 86 2012 2012 2 Christos Doulkeridis, Akrivi Vlachou, Kjetil Nørvåg, Michalis Vazirgiannis Distributed Semantic Overlay Networks X.Shen et al. (Eds.), Handbook of Peer-to-Peer Networking, Springer, ISBN: 978-0-387-09750-3 463-494 January 2010 2010 ./papers/bcsons10.pdf 1 Akrivi Vlachou, Christos Doulkeridis, Dimitris Mavroeidis, Michalis Vazirgiannis Designing a Peer-to-Peer Architecture for Distributed Image Retrieval Boujemaa Nozha, Detyniecki Marcin, Nuernberger Andreas (Eds.), Adaptive Multimedia Retrieval: Retrieval, User, and Semantics, Revised Selected Papers, Lecture Notes in Computer Science, Springer, Vol. 4918, ISBN: 978-3-540-79859-0 182-195 2008 2008 17 Konstantinos Georgoulas, Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis User-centric Similarity Search IEEE Transactions on Knowledge and Data Engineering (TKDE) (to appear) 2017 2017 ./papers/tkde17.pdf yes 16 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Exploratory Product Search using Top-k Join Queries Information Systems (to appear) 64 75-92 2017 2017 ./papers/is17.pdf yes 15 Dimitris Pertesis, Christos Doulkeridis Efficient Skyline Query Processing in SpatialHadoop Information Systems 54 325-335 2015 2015 ./papers/is15.pdf 14 Christos Doulkeridis and Kjetil Nørvåg A Survey of Large-Scale Analytical Query Processing in MapReduce The VLDB Journal 23 3 355-380 June 2014 2014 ./papers/vldbj14.pdf 13 Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Distributed Top-k Query Processing by Exploiting Skyline Summaries Distributed and Parallel Databases (special issue on Ranking in Databases) 30 3-4 239-271 August 2012 2012 ./papers/dpd12.pdf 12 Akrivi Vlachou, Christos Doulkeridis and Yannis Kotidis Metric-based Similarity Search in Unstructured Peer-to-Peer Systems Transactions on Large-Scale Data- and Knowledge-Centered Systems, Springer 5 28-48 2012 2012 ./papers/tldks12.pdf 11 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis and Kjetil Nørvåg Monochromatic and Bichromatic Reverse Top-k Queries IEEE Transactions on Knowledge and Data Engineering (TKDE) (special issue Best of ICDE'10 papers) 23 8 1215-1229 August 2011 2011 ./papers/tkde11.pdf 10 Robert Neumayer, Christos Doulkeridis and Kjetil Nørvåg A Hybrid Approach for Estimating Document Frequencies in Unstructured P2P Networks Information Systems 36 3 579-595 May 2011 2011 ./papers/is11.pdf 9 Panagis Magdalinos, Christos Doulkeridis, Michalis Vazirgiannis Enhancing Clustering Quality through Landmark-based Dimensionality Reduction ACM Transactions on Knowledge Discovery from Data (special issue on Large-Scale Data Mining: Theory and Applications) 5 2 February 2011 2011 ./papers/tkdd11.pdf 8 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis, Michalis Vazirgiannis Efficient Routing of Subspace Skyline Queries over Highly Distributed Data IEEE Transactions on Knowledge and Data Engineering (TKDE) 22 12 1694-1708 December 2010 2010 ./papers/tkde10.pdf 7 Christos Doulkeridis, Akrivi Vlachou, Kjetil Nørvåg, Yannis Kotidis, Michalis Vazirgiannis Efficient Search based on Content Similarity over Self-Organizing P2P Networks Peer-to-Peer Networking and Applications, Springer 3 1 67-79 March 2010 2010 ./papers/ppna10.pdf 6 Christos Doulkeridis, Akrivi Vlachou, Yannis Kotidis, Michalis Vazirgiannis Efficient Range Query Processing in Metric Spaces over Highly Distributed Data Distributed and Parallel Databases (special issue on Data Management in Peer-to-Peer Systems) 26 2-3 155-180 December 2009 2009 ./papers/dapd09.pdf 5 Christos Doulkeridis, Michalis Vazirgiannis CASD: Management of a Context-Aware Service Directory Pervasive and Mobile Computing, Elsevier 4 5 737-754 October 2008 2008 ./papers/pmc08.pdf 4 Christos Doulkeridis, Vassilis Zafeiris, Kjetil Nørvåg, Michalis Vazirgiannis, Emmanouel Giakoumakis Context-based Caching and Routing for P2P Web Service Discovery Distributed and Parallel Databases 21 1 59-84 February 2007 2007 ./papers/dapd07.pdf 3 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis DESENT: Decentralized and Distributed Semantic Overlay Generation in P2P Networks IEEE Journal on Selected Areas in Communications (J-SAC) (special issue on Peer-to-Peer Communications and Applications) 25 1 25-34 January 2007 2007 ./papers/jsac07.pdf 2 Christos Doulkeridis, Nikos Loutas, Michalis Vazirgiannis A System Architecture for Context-Aware Service Discovery Electronic Notes in Theoretical Computer Science 146 1 101-116 January 2006 2006 ./papers/cws05.pdf 1 Yannis Stavrakas, Manolis Gergatsoulis, Christos Doulkeridis, Vassilis Zafeiris Representing and Querying Histories of Semistructured Databases Using Multidimensional OEM Information Systems 29 6 461-482 September 2004 2004 ./papers/is04.pdf 49 Christos Doulkeridis, Akrivi Vlachou, Dimitris Mpestas and Nikos Mamoulis Parallel and Distributed Processing of Spatial Preference Queries using Keywords 20th International Conference on Extending Database Technology (EDBT'17) March 21-24, 2017 2017 Venice, Italy yes 48 Mei Saouk, Christos Doulkeridis, Akrivi Vlachou and Kjetil Nørvåg Efficient Processing of Top-k Joins in MapReduce IEEE International Conference on Big Data (IEEE BigData'16) December 5-8, 2016 2016 Washington D.C., USA ./papers/bigdata16.pdf yes 47 Panagiotis Nikitopoulos, Aris-Iakovos Paraskevopoulos, Christos Doulkeridis, Nikos Pelekis, Yannis Theodoridis BigCAB: Distributed Hot Spot Analysis over Big Spatio-temporal Data using Apache Spark (GIS Cup) 24th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2016) October 31 - November 3, 2016 2016 Francisco Bay Area, California, USA ./papers/gis16.pdf yes 46 Maria Karanasou, Anneta Ampla, Christos Doulkeridis and Maria Halkidi Scalable and Real-time Sentiment Analysis on Twitter Data 6th ICDM Workshop on Sentiment Elicitation from Natural Text for Information Retrieval and Extraction (SENTIRE'16) December 12, 2016 2016 Barcelona, Spain ./papers/sentire16.pdf yes 45 Georgios A. Sfyris, Nikolaos Fragkos and Christos Doulkeridis Profile-Based Selection of Expert Groups 20th International Conference on Theory and Practice of Digital Libraries (TPDL'16) 81-93 September 5-9, 2016 2016 Hannover, Germany ./papers/tpdl16.pdf yes 44 Christos Doulkeridis, Akrivi Vlachou, Panagiotis Nikitopoulos, Panagiotis Tampakis and Mei Saouk The RoadRunner Framework for Efficient and Scalable Processing of Big Data 19th Panhellenic Conference on Informatics (PCI'15) 215-220 October 1-3, 2015 2015 Athens, Greece ./papers/pci15.pdf 43 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Maximizing Influence of Spatio-Textual Objects Based on Keyword Selection 14th International Symposium on Spatial and Temporal Databases (SSTD'15) August 26-28, 2015 2015 Seoul, South Korea ./papers/sstd15.pdf 42 Maria Karanasou, Christos Doulkeridis and Maria Halkidi DsUniPi: An SVM-based approach for Sentiment Analysis of Figurative Language on Twitter 9th International Workshop on Semantic Evaluation (SemEval 2015) June 4-5, 2015 2015 Denver, Colorado ./papers/semeval15.pdf 41 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Finding the Most Diverse Products using Preference Queries 18th International Conference on Extending Database Technology (EDBT'15) March 23-27, 2015 2015 Brussels, Belgium ./papers/edbt15.pdf 40 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Efficient Processing of Exploratory Top-k Joins 26th International Conference on Scientific and Statistical Database Management (SSDBM'14) June 30 - July 2, 2014 2014 Aalborg, Denmark ./papers/ssdbm14.pdf 39 Stian Liknes, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg APSkyline: Improved Skyline Computation for Multicore Architectures 19th International Conference on Database Systems for Advanced Applications (DASFAA'14) April 21-24, 2014 2014 Bali, Indonesia ./papers/dasfaa14.pdf 38 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Discovering Influential Data Objects over Time 13th International Symposium on Spatial and Temporal Databases (SSTD'13) August 21-23, 2013 2013 Munich, Germany ./papers/sstd13.pdf 37 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg and Yannis Kotidis Branch-and-Bound Algorithm for Reverse Top-k Queries ACM International Conference on Management of Data (SIGMOD'13) June 22-27, 2013 2013 New York, USA ./papers/sigmod13.pdf 36 Christos Doulkeridis and Kjetil Nørvåg On Saying "Enough Already!" in MapReduce 1st International Workshop on Cloud Intelligence (Cloud-I 2012, co-located with VLDB'2012) August 31, 2012 2012 Istanbul, Turkey ./papers/cloudi12.pdf 35 Akrivi Vlachou, Christos Doulkeridis and Maria Halkidi Discovering Representative Skyline Points over Distributed Data 24th International Conference on Scientific and Statistical Database Management (SSDBM'12) June 25-27, 2012 2012 Chania, Greece ./papers/ssdbm12.pdf 34 Christos Doulkeridis, Akrivi Vlachou, Kjetil Nørvåg, Yannis Kotidis and Neoklis Polyzotis Processing of Rank Joins in Highly Distributed Systems 28th IEEE International Conference on Data Engineering (ICDE'12) April 1-5, 2012 2012 Washington, DC, USA ./papers/icde12.pdf 33 Akrivi Vlachou, Christos Doulkeridis, Neoklis Polyzotis Skyline Query Processing over Joins ACM International Conference on Management of Data (SIGMOD'11) June 12-16 2011 Athens, Greece ./papers/sigmod11.pdf 32 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg Monitoring Reverse Top-k Queries Over Mobile Devices 10th ACM International Workshop on Data Engineering for Wireless and Mobile Access (MobiDE'11) June 12, 2011 2011 Athens, Greece ./papers/mobide11.pdf 31 João B. Rocha-Junior, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Efficient Processing of Top-k Spatial Preference Queries VLDB Endowment (PVLDB), 4(2) 93-104 August 29 - September 3, 2011 2011 Seattle, WA ./papers/pvldb11.pdf 30 Norvald H. Ryeng, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Efficient Distributed Top-k Query Processing with Caching 16th International Conference on Database Systems for Advanced Applications (DASFAA'11) April 22-25, 2011 2011 Hong Kong ./papers/dasfaa11.pdf 29 João B. Rocha-Junior, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Efficient Execution Plans for Distributed Skyline Query Processing 14th International Conference on Extending Database Technology (EDBT'11) March 21-25, 2011 2011 Uppsala, Sweden ./papers/edbt11.pdf 28 Christos Doulkeridis, Akrivi Vlachou, Kjetil Nørvåg, Yannis Kotidis and Michalis Vazirgiannis On the Selectivity of Multidimensional Routing Indices 19th ACM Conference on Information and Knowledge Management (CIKM'10) October 26-30, 2010 2010 Toronto, Canada ./papers/cikm10.pdf 13,4% 27 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg and Yannis Kotidis Identifying the Most Influential Data Objects with Reverse Top-k Queries 36th International Conference on Very Large Data Bases (VLDB'10) September, 2010 2010 Singapore ./papers/vldb10.pdf 26 Akrivi Vlachou, Christos Doulkeridis and Yannis Kotidis Peer-to-Peer Similarity Search based on M-Tree Indexing 15th International Conference on Database Systems for Advanced Applications (DASFAA'10) (short paper) 269-275 April 1-4, 2010 2010 Tsukuba, Japan ./papers/dasfaa10.pdf 25 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis and Kjetil Nørvåg Reverse Top-k Queries 26th IEEE International Conference on Data Engineering (ICDE'10) March 1-6, 2010 2010 Long Beach, CA ./papers/icde10.pdf ./presentations/icde10.pdf 12,5% 24 Christos Doulkeridis, Akrivi Vlachou, Kjetil Nørvåg, Yannis Kotidis and Michalis Vazirgiannis Multidimensional Routing Indices for Efficient Distributed Query Processing 18th ACM Conference on Information and Knowledge Management (CIKM'09) (short paper) November 2-6, 2009 2009 Hong-Kong ./papers/cikm09.pdf 23 Robert Neumayer, Christos Doulkeridis and Kjetil Nørvåg Aggregation of Document Frequencies in Unstructured P2P Networks 10th International Conference on Web Information Systems Engineering (WISE'09) October 5-7, 2009 2009 Poznan, Poland ./papers/wise09.pdf 22 João B. Rocha-Junior, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg AGiDS: A Grid-based Strategy for Distributed Skyline Query Processing 2nd International Conference on Data Management in Grid and P2P Systems (Globe 2009) August 31 - September 4, 2009 2009 Linz, Austria ./papers/globe09.pdf 21 Panagis Magdalinos, Christos Doulkeridis, Michalis Vazirgiannis FEDRA: A Fast and Efficient Dimensionality Reduction Algorithm SIAM International Conference on Data Mining (SDM'09) April 30 - May 2, 2009 2009 Nevada, USA ./papers/sdm09.pdf 20 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis Peer-to-Peer Similarity Search over Widely Distributed Document Collections 6th Workshop on Large-Scale Distributed Systems for Information Retrieval (LSDS-IR'08, in conjunction with CIKM'2008) October 2008 2008 Napa Valley, USA ./papers/lsdsir08.pdf ./presentations/LSDS-IR08.pdf 19 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis On Efficient Top-k Query Processing in Highly Distributed Environments ACM International Conference on Management of Data (SIGMOD'08) June 9-12 2008 Vancouver, Canada ./papers/sigmod08a.pdf 17,9% 18 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis Angle-based Space Partitioning for Efficient Parallel Skyline Computation ACM International Conference on Management of Data (SIGMOD'08) June 9-12 2008 Vancouver, Canada ./papers/sigmod08b.pdf 17,9% 17 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis Schema-Assisted Peer Selection for XML Querying in Unstructured P2P Systems 7th ACM International Workshop on Data Engineering for Wireless and Mobile Access (MobiDE'08) June 13, 2008 2008 Vancouver, Canada ./papers/mobide08.pdf 16 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis Skyline-based Peer-to-Peer Top-k Query Processing 24th IEEE International Conference on Data Engineering (ICDE'08) April 7-12, 2008 2008 Cancun, Mexico ./papers/icde08.pdf 15 Christos Doulkeridis, Akrivi Vlachou, Yannis Kotidis, Michalis Vazirgiannis Peer-to-Peer Similarity Search in Metric Spaces 33rd International Conference on Very Large Data Bases (VLDB'07) September 23-28, 2007 2007 Vienna, Austria ./papers/simpeer.pdf ./presentations/vldb07.pdf 16,4% 14 Akrivi Vlachou, Christos Doulkeridis, Dimitris Mavroeidis, Michalis Vazirgiannis Designing a Peer-to-Peer Architecture for Distributed Image Retrieval 5th International Workshop on Adaptive Multimedia Retrieval (AMR'07) July 5-6, 2007 2007 Paris, France 13 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis, Michalis Vazirgiannis SKYPEER: Efficient Subspace Skyline Computation over Distributed Data 23rd IEEE International Conference on Data Engineering (ICDE'07) April 16-20, 2007 2007 Istanbul, Turkey ./papers/icde07.pdf 18,5% 12 Panagis Magdalinos, Christos Doulkeridis, Michalis Vazirgiannis K-Landmarks: Distributed Dimensionality Reduction for Clustering Quality Maintenance 10th European Conference on Principles and Practice of Knowledge Discovery in Databases (PKDD'06) 322-334 September 18-22, 2006 2006 Berlin, Germany ./papers/xKLandmarks.pdf 14,5% 11 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis Schema Caching for Improved XML Query Processing in P2P Systems 6th IEEE International Conference on Peer-to-Peer Computing (P2P'06) 73-74 September 2006 2006 Cambridge, UK ./papers/p2p06.pdf ./presentations/P2P06.pdf 10 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis Scalable Semantic Overlay Generation for P2P-based Digital Libraries 10th European Conference on Research and Advanced Technology for Digital Libraries (ECDL'06) 26-38 September 2006 2006 Alicante, Spain ./papers/ecdl06.pdf ./presentations/ecdl06.pdf 28% 9 Kjetil Nørvåg, Christos Doulkeridis, Michalis Vazirgiannis Taxonomy Caching: A Scalable Low-Cost Mechanism for Indexing Remote Contents in Peer-to-Peer Systems IEEE International Conference on Pervasive Services 2006 (ICPS'06) 213-221 June 2006 2006 Lyon, France ./papers/tcache.pdf ./presentations/icps06.pdf 20,9% 8 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis The SOWES Approach to P2P Web Search using Semantic Overlays 15th World Wide Web Conference (WWW'06) - Alternate Track Papers and Posters 1027-1028 May 23-26, 2006 2006 Edinburgh, Scotland ./papers/sowes@www06.pdf ./papers/www06poster.pdf 7 Michalis Vazirgiannis, Kjetil Nørvåg, Christos Doulkeridis Peer-to-Peer Clustering for Semantic Overlay Network Generation 6th International Workshop on Pattern Recognition in Information Systems (PRIS'06), co-located with ICEIS 2006 (invited paper), INSTICC Press 2006, ISBN 972-8865-55-4 May 2006 2006 Paphos, Cyprus ./papers/pris06.pdf 6 Panagis Magdalinos, Christos Doulkeridis, Michalis Vazirgiannis A Novel Effective Distributed Dimensionality Reduction Algorithm International Workshop on Feature Selection for Data Mining (FSDM'06), in conjunction with 2006 SIAM Conference on Data Mining 18-25 April 22, 2006 2006 Bethesda, Maryland ./papers/ddr06.pdf ./presentations/FSDM.pdf 5 Vassilis Zafeiris, Christos Doulkeridis, Petros Belsis, Ioannis Chalaris Agent-mediated Knowledge Management in Multiple Autonomous Domains AAMAS 2005 Workshop on Agent Mediated Knowledge Management (AMKM'05) July 2005 2005 Utrecht, the Netherlands ./papers/amkm05.pdf 4 Christos Doulkeridis, Vassilis Zafeiris, Michalis Vazirgiannis The Role of Caching and Context-Awareness in P2P Service Discovery 6th International Conference on Mobile Data Management (MDM'05) 142-146 May 9-13, 2005 2005 Ayia Napa, Cyprus ./papers/mdm05.pdf ./presentations/mdm05.pdf 39% 3 Christos Doulkeridis, Michalis Vazirgiannis Querying and Updating a Context-Aware Service Directory in Mobile Environments 2004 IEEE/WIC/ACM International Conference on Web Intelligence (WI'04) 562-565 September 20-24, 2004 2004 Beijing, China ./papers/wi04.ps ./presentations/WI04.pdf 20% Second winner of Michael Dertouzos competition (WCIT 2004) http://cordis.europa.eu/greece/news_rd41.htm 2 Christos Doulkeridis, Efstratios Valavanis, Michalis Vazirgiannis Towards a Context-Aware Service Directory 4th VLDB Workshop on Technologies for E-Services (TES'03), held in conjunction with the 29th International Conference on Very Large Data Bases (VLDB 2003) 54-65 September 8, 2003 2003 Berlin, Germany ./papers/tes03.pdf ./presentations/TES03.pdf 37,2% 1 Yannis Stavrakas, Manolis Gergatsoulis, Christos Doulkeridis, Vassilis Zafeiris Accomodating Changes in Semistructured Databases Using Multidimensional OEM Advances in Databases and Information Systems (ADBIS'02), 6th East-European Conference 360-373 September 8-11, 2002 2002 Bratislava, Slovakia ./papers/adbis02.pdf 21,7% 15 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Maximizing Influence of Spatio-Textual Objects Based on Keyword Selection 14th Hellenic Data Management Symposium (HDMS'16) July 28-29, 2016 2016 Athens, Greece 14 Orestis Gkorgkas, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Finding the Most Diverse Products using Preference Queries 13th Hellenic Data Management Symposium (HDMS'15) July 30-21, 2015 2015 Athens, Greece 13 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg and Yannis Kotidis Branch-and-Bound Algorithm for Reverse Top-k Queries 12th Hellenic Data Management Symposium (HDMS'14) July 2014 2014 Athens, Greece 12 João B. Rocha-Junior, Akrivi Vlachou, Christos Doulkeridis and Kjetil Nørvåg Efficient Algorithms for Top-k Spatial Preference Queries 11th Hellenic Data Management Symposium (HDMS'12) June 2012 2012 Chania, Greece 11 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg, Yannis Kotidis Using Reverse Top-k Queries for Identifying the Most Influential Data Objects 10th Hellenic Data Management Symposium (HDMS'11) June 2011 2011 Athens, Greece 10 Akrivi Vlachou, Christos Doulkeridis, Neoklis Polyzotis Skyline Queries over Relational Joins 10th Hellenic Data Management Symposium (HDMS'11) June 2011 2011 Athens, Greece 9 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis, Kjetil Nørvåg Efficient Algorithms for Reverse Top-k Queries 9th Hellenic Data Management Symposium (HDMS'10) July 2010 2010 Ayia Napa, Cyprus 8 Panagis Magdalinos, Christos Doulkeridis, Michalis Vazirgiannis FEDRA: A Fast and Efficient Dimensionality Reduction Algorithm 8th Hellenic Data Management Symposium (HDMS'09) August 2009 2009 Athens, Greece 7 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis Skyline Computation in a Parallel Shared-Nothing Architecture 8th Hellenic Data Management Symposium (HDMS'09) August 2009 2009 Athens, Greece 6 Christos Doulkeridis, Akrivi Vlachou, Yannis Kotidis, Michalis Vazirgiannis Efficient Similarity Search in Highly Distributed Environments 7th Hellenic Data Management Symposium (HDMS'08) July 2008 2008 Heraklion, Greece 5 Akrivi Vlachou, Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis Efficient Processing of Top-k Queries in P2P Networks 7th Hellenic Data Management Symposium (HDMS'08) July 2008 2008 Heraklion, Greece 4 Akrivi Vlachou, Christos Doulkeridis, Yannis Kotidis, Michalis Vazirgiannis SKYPEER: Efficient Subspace Skyline Computation over Distributed Data 6th Hellenic Data Management Symposium (HDMS'07) July 5-6, 2007 2007 Athens, Greece 3 Kjetil Nørvåg, Christos Doulkeridis, Michalis Vazirgiannis The SOWES Approach to P2P Web Search using Semantic Overlays 5th Hellenic Data Management Symposium (HDMS'06) September 7-8, 2006 2006 Thessaloniki, Greece ./presentations/HDMS06.pdf 2 Christos Doulkeridis, Michalis Vazirgiannis Updating a Context-Aware Service Directory for M-Services 3rd Hellenic Data Management Symposium (HDMS'04) June 28-29, 2004 2004 Athens, Greece ./presenations/hdms04.pdf 1 Vassilis Zafeiris, Christos Doulkeridis, Yannis Stavrakas, Manolis Gergatsoulis An Infrastructure for Manipulating Multidimensional Semistructured Data 1st Hellenic Data Management Symposium (HDMS'02) July 22-23, 2002 2002 Athens, Greece ./papers/hdms02.pdf 2 Panagis Magdalinos, Christos Doulkeridis, Michalis Vazirgiannis A Novel Effective Distributed Dimensionality Reduction Algorithm 2006 2006 ./papers/ddr06TechRep.pdf 1 Christos Doulkeridis, Kjetil Nørvåg, Michalis Vazirgiannis DESENT: Decentralized and Distributed Semantic Overlay Generation in P2P Networks 2005 2005 ./papers/DESENTtechrep.pdf