Data management research at the Knowledge and Database Systems Lab: (NTU Athens)

ABSTRACT

The Knowledge and Database Systems Lab (KDBSL) of the Electrical and Computer Engineering Dept. in the National Technical University of Athens was founded in 1992 by Prof. Timos Sellis and Prof. Yannis Vassiliou. Its activities involve theoretical and applied research in the area of Databases and Information Systems. The lab employs three postdoc researchers (Dr Theodore Dalamagas, Dr Alkis Simitsis, Dr Yannis Stavrakas), several PhD students and many graduate students. It has been involved in many research projects supported by the EU, international institutions, Greek organizations, the Greek Government and industrial companies.

REFERENCES

• 1: Mehrdad Jahangiri , Dimitris Sacharidis , Cyrus Shahabi, SHIFT-SPLIT: I/O efficient maintenance of wavelet-transformed multidimensional data, Proceedings of the 2005 ACM SIGMOD international conference on Management of data, June 14-16, 2005, Baltimore, Maryland [doi>10.1145/1066157.1066189]
• 2: G. Cormode, M. Garofalakis, and D. Sacharidis. Fast Approximate Wavelet Tracking on Streams. In Proceedings of the EDBT'06 International Conference, Munich, Germany, Mar 26-30, 2006.
• 3: K. Patroumpas, T. Sellis. Window Specification over Data Streams. In Proceedings of the ICSNW'06 International Conference, Munich, Germany, Mar 30, 2006.
• 4: K. Patroumpas, T. Sellis. Managing Trajectories of Moving Objects as Data Streams. In Proceedings of the STDBM'04 Workshop, Toronto, Canada, Aug 30, 2004.
• 5: M. Potamias, K. Patroumpas, T. Sellis. Sampling Trajectory Streams with Spatiotemporal Criteria. In Proceedings of the SSDBM'06 International Conference, Vienna, Austria, Jul 3-5, 2006.
• 6: A. Simitsis. Modeling and Optimization of Extraction-Transformation-Loading (ETL) Processes in Data Warehouse Environments. PhD Thesis, Athens, Greece, 2004.
• 7: Panos Vassiliadis , Alkis Simitsis , Spiros Skiadopoulos, Conceptual modeling for ETL processes, Proceedings of the 5th ACM international workshop on Data Warehousing and OLAP, p.14-21, November 08-08, 2002, McLean, Virginia, USA [doi>10.1145/583890.583893]
• 8: Panos Vassiliadis , Alkis Simitsis , Spiros Skiadopoulos, On the Logical Modeling of ETL Processes, Proceedings of the 14th International Conference on Advanced Information Systems Engineering, p.782-786, May 27-31, 2002
• 9: P. Vassiliadis, A. Simitsis, P. Georgantas, M. Terrovitis. A Framework for the Design of ETL Scenarios. In Proceedings of the CAiSE'03 International Conference, Velden, Austria, Jun 16-20, 2003.
• 10: A. Simitsis, P. Vassiliadis, M. Terrovitis, S. Skiadopoulos. Graph-Based Modeling of ETL Activities with Multi-Level Transformations and Updates. In Proceedings of the DaWaK'05 International Conference, Copenhagen, Denmark, Aug 22-26, 2005.
• 11: P. Vassiliadis, A. Simitsis, S. Skiadopoulos. Modeling ETL Activities as Graphs. In Proceedings of the DMDW'02 International Workdhop, Toronto, Canada, May 27, 2002.
• 12: P. Vassiliadis, A. Simitsis, M. Terrovitis, S. Skiadopoulos. Blueprints and Measures for ETL Workflows. In Proceedings of the ER'05 International Conference, Klagenfurt, Austria, Oct 24-28, 2005.
• 13: Alkis Simitsis, Mapping conceptual to logical models for ETL processes, Proceedings of the 8th ACM international workshop on Data warehousing and OLAP, November 04-05, 2005, Bremen, Germany [doi>10.1145/1097002.1097014]
• 14: Alkis Simitsis , Panos Vassiliadis , Timos Sellis, Optimizing ETL Processes in Data Warehouses, Proceedings of the 21st International Conference on Data Engineering (ICDE'05), p.564-575, April 05-08, 2005 [doi>10.1109/ICDE.2005.103]
• 15: Alkis Simitsis , Panos Vassiliadis , Timos Sellis, State-Space Optimization of ETL Workflows, IEEE Transactions on Knowledge and Data Engineering, v.17 n.10, p.1404-1419, October 2005 [doi>10.1109/TKDE.2005.169]
• 16: Panos Vassiliadis , Alkis Simitsis , Panos Georgantas , Manolis Terrovitis , Spiros Skiadopoulos, A generic and customizable framework for the design of ETL scenarios, Information Systems, v.30 n.7, p.492-525, November 2005 [doi>10.1016/j.is.2004.11.002]
• 17: G. Papastefanatos, P. Vassiliadis, Y. Vassiliou. Adaptive Query Formulation to Handle Database Evolution. In Proceedings of the CAiSE'06 Forum, Luxembourg, Grand-Duchy of Luxembourg, Jun 9, 2006.
• 18: G. Papastefanatos, K. Kyzirakos, P. Vassiliadis, Y. Vassiliou. Hecataeus: A Framework for Representing SQL Constructs as Graphs. In Proceedings of the EMMSAD'05 International Workshop, Porto, Portugal, Jun 13-17, 2005.
• 19: Georgia Koutrika , Alkis Simitsis , Yannis Ioannidis, Précis: The Essence of a Query Answer, Proceedings of the 22nd International Conference on Data Engineering (ICDE'06), p.69, April 03-07, 2006 [doi>10.1109/ICDE.2006.114]
• 20: A. Simitsis, G. Koutrika. Pattern-Based Query Answering. In Proceedings of the PaRMa'06 International Workshop, Munich, Germany, Mar 30, 2006.
• 21: A. Simitsis, G. Koutrika. Comprehensible Answers to Précis Queries. In Proceedings of the CAiSE'06 International Conference, Luxembourg, Grand-Duchy of Luxembourg, Jun 5-9, 2006.
• 22: M. Terrovitis, S. Passas, P. Vassiliadis, T. Sellis. A combination of trie-trees and inverted files for the indexing of set-valued attributes, 2006. Submitted for publication.
• 23: S. Rizzi, E. Bertino, B. Catania, M. Golfarelli, M. Halkidi, M. Terrovitis, P. Vassiliadis, M. Vazirgiannis, E. Vrachnos. Towards a logical model for patterns. In Proceedings of the ER'03 International Conference, Chicago, USA, Oct 13-16, 2003.
• 24: M. Terrovitis, P. Vassiliadis, S. Skiadopoulos, E. Bertino, B. Catania, A. Maddalena. Modeling and Language Support for the Management of Pattern-Bases. In Proceedings of the SSDMB'04 International Conference, Santorini Island, Greece, Jun 21-23, 2004.
• 25: Yannis Stavrakas , Manolis Gergatsoulis, Multidimensional Semistructured Data: Representing Context-Dependent Information on the Web, Proceedings of the 14th International Conference on Advanced Information Systems Engineering, p.183-199, May 27-31, 2002
• 26: Y. Stavrakas, K., A. Efandis, T. Sellis. Implementing a Query Language for Context-dependent Semistructured Data. In Proceedings of ADBIS'04 Conference, Budapest, Hungary, Sep 22-25, 2004.
• 27: Yannis Stavrakas , Manolis Gergatsoulis , Christos Doulkeridis , Vassilis Zafeiris, Representing and querying histories of semistructured databases using multidimensional OEM, Information Systems, v.29 n.6, p.461-482, September 2004 [doi>10.1016/j.is.2003.10.005]
• 28: M. Gergatsoulis, Y. Stavrakas. Representing Changes in XML Documents Using Dimensions. In Proceedings of the XSym'03 International Symposium, Berlin, Germany, Sep 8, 2003.
• 29: Y. Roussos, Y. Stavrakas, V. Pavlaki. Towards a Context-Aware Relational Model. In Proceedings of the CRR'05 Workshop, Paris, France, Jul 5-8, 2005.
• 30: Theodore Dalamagas , Dimitri Theodoratos , Antonis Koufopoulos , Vincent Oria, Evaluation of Queries on Tree-Structured Data Using Dimension Graphs, Proceedings of the 9th International Database Engineering & Application Symposium (IDEAS'05), p.65-74, July 25-27, 2005 [doi>10.1109/IDEAS.2005.27]
• 31: T. Dalamagas, D. Theodoratos, A. Koufopoulos, and I-Ting Liu. Semantic Integration of Tree-structured Data Using Dimension Graphs. In Journal on Data Semantics, IV, 2005.
• 32: D. Theodoratos, and T. Dalamagas. Querying Tree-Structured Data using Dimension Graphs. In Proceedings of the CAiSE'05 International Conference, Porto, Portugal, Jun 13-17, 2005.
• 33: Dimitri Theodoratos , Theodore Dalamagas , Antonis Koufopoulos , Narain Gehani, Semantic querying of tree-structured data sources using partially specified tree patterns, Proceedings of the 14th ACM international conference on Information and knowledge management, October 31-November 05, 2005, Bremen, Germany [doi>10.1145/1099554.1099729]
• 34: D. Theodoratos, T. Dalamagas, P. Placek, S. Souldatos and T. Sellis. Containment of Partially Specified Tree-Pattern Queries. In Proceedings of the SSDBM'06 International Conference, Vienna, Austria, Jul 3--5, 2006.
• 35: V. Kantere, D. Tsoumakos, T. Sellis, N. Roussopoulos. GrouPeer: Dynamic Clustering of P2P Databases, 2006. Submitted for publication.
• 36: V. Kantere, T. Sellis. Handling Spatial Data in P2P Systems, 2006. Submitted for publication.
• 37: Verena Kantere , Aris Tsois, Using ECA Rules to Implement Mobile Query Agents for Fast-Evolving Pure P2P Networks, Proceedings of the Third International Joint Conference on Autonomous Agents and Multiagent Systems, p.1510-1511, July 19-23, 2004, New York, New York [doi>10.1109/AAMAS.2004.293]
• 38: V. Kantere, I. Kiringa, J. Mylopoulos, A. Kementsientidis, M. Arenas. Coordinating P2P Databases Using ECA Rules. In Proceedings of the DBISP2P'03 International Workshop, Berlin, Germany, Sep 7-8, 2003.
• 39: Z. Kaoudi, T. Dalamagas, T. Sellis. RDFSculpt: Managing RDF Schemas under Set-like Semantics. In Proceedings of the ESWC'05 Conference, Heraklion, Greece, May 29-Jun 1, 2005.
• 40: I. Spyropoulou, T. Dalamagas, T. Sellis. SDQNET: Semantic Distributed Querying in Loosely Coupled Data Sources, 2006. Submitted for publication.
• 41: Manolis Veliskakis , John Roussos , Panos Georgantas , Timos Sellis, DOMProxy: Enabling Dynamic-Content Front-end Web Caching, Proceedings of the 10th International Workshop on Web Content Caching and Distribution (WCW'05), p.56-61, September 12-13, 2005 [doi>10.1109/WCW.2005.9]

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.2 DATABASE MANAGEMENT
      H.2.0 General

Additional Classification:
  A. General Literature
  A.0 GENERAL

  H. Information Systems
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.0 General

  I. Computing Methodologies
  I.2 ARTIFICIAL INTELLIGENCE
      I.2.4 Knowledge Representation Formalisms and Methods