Selected Publications

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• K. Tsakalozos, M. Roussopoulos and A. Delis,
  ``VM Placement in non-Homogeneous IaaS-Clouds'',
  Proc. of the 9th Int. Conf. on Service Oriented Computing (ICSOC 2011),
  Paphos, Cyprus, December 2011.
  pdf, bib


• K. Saidis, Y. Smaragdakis and A. Delis,
  ``DOLAR: Virtualizing Heterogeneous Information Spaces to Support their Expansion,''
  Software: Practice and Experience,
  vol. 41, no. 11, pp. 1349-1383, October 2011, DOI: 10.1002/spe.1050
  pdf, bib


• K. Tsakalozos, S. Evangelatos and A. Delis,
  ``DiVA: Indexing High-Dimensional Data by "Diving" into Vector Approximations
  Proc. of the IEEE Int. Conf. on Multimedia and Expo (ICME'11)
  Barcelona, Spain, July, 2011.
  pdf, bib


• V. Verroios, V. Efstathiou and A. Delis,
  ``Reaching Available Public Parking Spaces in Urban Environments using Ad-hoc Networking,"
  Proc. of the 12th IEEE Int. Conf. on Mobile Data Management (MDM'11) Lulea, Sweden, June 2011.
  ps, pdf, bib


• A. Deligiannakis, Y. Kotidis, V. Stoumpos and A. Delis,
  ``Collection Trees for Event-Monitoring Queries,''
  Information Systems,
  vol. 36, no. 2, pp. 386-405, April 2011, doi:10.1016/j.is.2010.08.003
  pdf, bib


• K. Tsakalozos, H. Kllapi, E. Sitaridi, M. Roussopoulos, D. Paparas and A. Delis,
  ``Flexible Use of Cloud Resources through Profit Maximization and Price Discrimination,''
  Proceedings of the 27th IEEE Int. Conf. on Data Engineering (ICDE'11) Hannover, Germany, April 2011.
  pdf, bib


• H. Akcan, V. Kriakov, H. Bronnimann and A. Delis,
  ``Managing Cohort Movement of Mobile Sensors via GPS-free & Compass-free Node Localization,''
  Journal of Parallel and Distributed Computing,
  vol. 70, no. 7, pp. 743-757, July 2010, doi:10.1016/j.jpdc.2010.03.007
  pdf, bib


• K. Tsakalozos, M. Roussopoulos, V. Floros and A. Delis,
  ``Nefeli: Hint-based Execution of Workloads in Clouds,''
  Proc. of the 30th IEEE Int. Conf. of Distributed Computing Systems, Genoa, Italy, June 2010.
  ps, pdf, bib


• Z. Chen, Y. Zhang, Z.R. Chen and A. Delis,
  ``A Digest and Pattern Matching-Based Intrusion Detection Engine,''
  The Computer Journal vol. 52, no. 6, pp. 699-723, August 2009.
  pdf, bib


• V. Kriakov, G. Kollios and A. Delis,
  ``Self-tuning Management of Update Intensive Multidimensional Data in Clusters of Workstations,"
  The VLDB Journal vol. 18, no. 3, pp. 739-764, June, 2009.
  pdf, bib


• Z. Chen, A. Delis and P. Wei,
  ``A Pragmatic Methodology for Testing Intrusion Prevention Systems,''
  The Computer Journal, Oxford University Press,
  vol. 52, no. 4, pp. 429-460, April, 2009.
  ps, pdf, bib


• K. Tsakalozos, V. Kriakov and A. Delis,
  FlexFS: Transparent Resilience for GRID Storage Resources, ''
  Proc. of 9th IEEE International Symposium on Autonomous Decentralized Systems (ISADS 2009)
  Athens, Greece, March, 2009.
  ps, pdf, bib.


• A. Deligiannakis, Y. Kotidis, V. Vassalos, V. Stoumpos and A. Delis,
  `` Another Outlier Bites the Dust: Computing Meaningful Aggregates in Sensor Networks,''
  Proc. of the 25th Int. Conf. on Data Engineering (ICDE)
  Shanghai, China, March, 2009.
  pdf, bib.


• I. Pogkas, V. Kriakov, Z. Chen and A. Delis
  ``Adaptive Neighborhood Selection in Peer-to-peer Networks based on Content Similarity and Reputation,''
  Peer-to-Peer Networking and Applications vol. 2, no. 1, pp. 37-59, March 2009.
  pdf, bib


• V. Stoumpos and A. Delis,
  ``Fragment and Replicate Algorithms for Non-Equi-Join Evaluation on Smart Disks,''
  Proc. of 9th IEEE International Symposium on Autonomous Decentralized Systems (ISADS 2009)
  Athens, Greece, March, 2009.
  pdf, bib.


• K. Tsakalozos, V. Stoumpos, K. Saidis and A. Delis,
  ``Adaptive Disk Scheduling with Workload-dependent Anticipation Intervals,''
  Journal of Systems and Software, Elsevier Press,
  vol. 82, no. 2, pp. 274-291, February, 2009.
  ps, pdf, bib


• A. Papadimitriou and A. Delis,
  ``Data Dissemination in Unstructured Peer-to-Peer Networks'',
  37th Intrnational Conference on Parallel Processing (ICPP'08),
  Portland, OR, September 2008.
  ps, pdf, bib,


• V. Verroios, K. Kollias, P.K. Chrysanthis and A.Delis,
  ``Adaptive Navigation of Vehicles in Congested Road Networks,''
  International Conference on Pervasive Services (ICPS'08), ACM Press
  Sorrento, Italy, July, 2008.
  ps, pdf, bib


• Z. Chen, P. Wei and A. Delis,
  ``Catching Remote Administration Trojans (RATs),''
  Software: Practice and Experience
  vol. 38, no. 7, p.p. 667-703, June 2008.
  pdf, bib


• A. Deligiannakis, V. Stoumpos, Y. Kotidis, V. Vassalos and A. Delis,
  ``Outlier-Aware Data Aggregation in Sensor Networks,''
  IEEE International Conference on Data Engineering (ICDE'08) poster paper,
  Cancun, Mexico, April 2008.
  pdf, bib


• V. Stoumpos, A. Deligiannakis, Y. Kotidis and A. Delis,
  ``Processing Event-Monitoring Queries in Sensor Networks,''
  IEEE International Conference on Data Engineering (ICDE'08) poster paper,
  Cancun, Mexico, April 2008.
  pdf, bib


• Z. Chen, A. Delis and P. Wei,
  ``Identification and Management of Sessions Generated by Instant Messaging and Peer-to-Peer Systems,"
  International Journal of Cooperative Information Systems,
  vol. 17, no. 2, p.p. 1-49, March 2008.
  pdf, bib


• V. Kriakov, A. Delis and G. Kollios,
  ``Approximate Data Stream Joins in Distributed Systems,''
  Proceedings of the 27th IEEE International Conference on Distributed Computing Systems (ICDCS '07),
  Toronto, CA, June 2007.
  pdf, bib


• Y. Kotidis, A. Deligiannakis, V. Stoumpos, V. Vassalos and A. Delis,
  ``Robust Management of Outliers in Sensor Network Aggregate Queries,''
  Proceedings of the 6th ACM International Workshop on Data Engineering for Wireless and Mobile Access (Mobide'07) ,
  Beijing, China, June 2007.
  ps, pdf, bib


• K. Saidis and A. Delis,
  ``Type-consistent Digital Objects,''
  D-Lib Magazine,
  vol. 13, no. 5/6, doi:10.1045, May/June 2007
  html, bib


• Z. Chen, Z.R. Chen, and A. Delis,
  ``An Inline Detection and Prevention Framework for Distributed Denial of Service Attacks,''
  The Computer Journal, Oxford University Press,
  vol. 50, no. 1, pp. 7-40, January 2007.
  ps, pdf, bibs


• V. Kalogeraki, D. Zeinalipour-Yazti, D. Gunopulos and A. Delis,
  ``Distributed Middleware Architectures for Scalable Media Services,''
  Journal of Network and Computer Applications, Elsevier Press,
  vo. 30, no. 1, pp. 209-243 , January 2007.
  pdf, bib


• V. Stoumpos and A. Delis,
  ``GRACE-based Joins on Active Storage Devices,''
  Distributed and Parallel Databases,
  vol. 20, no. 3, pp. 199-224, September 2006.
  pdf, bib


• K. Saidis, G. Pyrounakis, M. Nikolaidou and A. Delis,
  ``Digital Object Prototypes: An Effective Realization of Digital Object Types,'' ,
  Proceedings of the 10th European Conference on Research and Advanced Technology for Digital Libraries (ECDL'06),
  Alicante, Spain, September 2006.
  pdf, bib


• H. Akcan, V. Kriakov, H. Bronnimann and A. Delis,
  ``GPS-Free Node Localization in Mobile Wireless Sensor Networks,''
  Proceedings of the 5th ACM International Workshop on Data Engineering for Wireless and Mobile Access (MobiDE'06),
  Chicago, IL, June 2006.
  ps, pdf, bib


• K. Zorbadelos, C. KK Loverdos and A. Delis,
  ``Non-stop Provision of Internet Services via a Reflectively Load-Sharing Architecture,''
  Proceedings of the 5th International System Administration and Network Engineering Conference(SANE 2006),
  Delft, The Netherlands, May, 2006
  ps, pdf, bib


• A. Kyriakidou, N. Karelos, and A. Delis
  ``Video-Streaming for Fast Moving Users in 3G Mobile Networks,''
  4rth International ACM Workshop on Data Engineering for Wireless and Mobile Access (MobiDE'05)
  Baltimore, MD, June, 2005.
  ps, pdf, bib


• E. Panagos and A. Delis,
  ``Selective Replication for Content Management Environments,''
  IEEE Internet Computing,
  vol. 9, no. 3, pp. 45-51, May/June 2005.
  pdf, bib


• M. Fragouli and A. Delis,
  ``Navigation and Multi-modal Transporation with EasyTransport,''
  IEEE Intelligent Systems,
  vol. 20, no. 2, pp. 54-61, March/April 2005.
  pdf, bib


• V. Kanitkar, and A. Delis,
  ``Efficient Processing and Site Selection for Client Transactions in Real-Time,''
  Distributed and Parallel Databases,
  vol. 17, no. 1, pp. 39-74, January 2005.
  pdf, bib


• Z. Chen, A. Delis, and H.L. Bertoni,
  ``Radio-Wave Propagation Prediction using Ray-Tracing Techniques on a Network of Workstations (NOW),''
  Journal of Parallel and Distributed Computing,
  vol. 64, no. 10, pp. 1127-1156, October 2004.
  ps, pdf, bib


• K. Zorbadelos and A. Delis,
  ``Enhancing DNS for Improved E-mail Services on a Clustered Environment,''
  4th International System Administration and Network Engineering Conference (SANE'04)
  Amsterdam, The Netherlands, September, 2004.
  ps, pdf, bib


• T. Dariotaki and A. Delis,
  ``Detecting Reputation Variations on a P2P Network,''
  6th Workshop on Distributed Data and Structures (WDAS'04),
  Lausanne, Switzerland, July 2004.
  ps, pdf, bib


• M. Hajdieleftheriou, V. Kriakov, Y. Tao, G. Kollios, A. Delis, and V. Tsotras,
  ``Spatio-temporal Data Services in a Shared Nothing Environment,''
  16th International Conference on Scientific and Statistical Database Management (SSDBM'04),
  Santorini, Greece, June 2004.
  ps, pdf, bib


• V. Kriakov, A Delis, and G. Kollios,
  ``Management of Highly Dynamic Multidimensional Data in a Cluster of Workstations,''
  9th International Conference of Extending Database Technology (EDBT'04),
  Heraklion, Greece, March 2004.
  ps, pdf, bib


• Z. Chen, A. Delis, and H.L. Bertoni,
  ``Building Footprint Simplification Techniques and Their Effects on Radio Propagation Predictions,''
  The Computer Journal, Oxford University Press,
  vol.47, no. 1, pp. 103-133, January, 2004.
  ps, pdf, bib


• Z. Chen, H.L. Bertoni, and A. Delis,
  ``Progressive and Approximate Techniques in Ray-Tracing based Radio Wave Propagation Prediction Models,''
  IEEE Transactions on Antennas and Propagation,
  vol. 52, no. 1, pp. 240-252, January 2004.
  ps, pdf, bib


• V. Kalogeraki, A. Delis, and D. Gunopoulos,
  ``Peer-to-Peer Architectures for Scalable, Efficient and Reliable Media Services'',
  IEEE International Parallel and Distributed Processing Symposium (IPDPS),
  Nice, France, April 2003.
  ps, pdf, bib


• T. Suel, C. Mathur, J. Wu, J. Zhang, A. Delis, M. Kharrazi, X Long, and K. Shanmugasunderam,
  ``ODISSEA: A Peer-to-Peer Architecture for Scalable Web Search and Information Retrieval,''
  Sixth International Workshop on the Web and Databases (WebDB),
  San Diego, CA, June 2003.
  ps, pdf, bib


• J.H. Park, V. Kanitkar, R. N. Uma, and A. Delis,
  ``Site Clustering in Three-Tier Database Architectures,''
  International Journal of Cooperative Information Systems,
  vol. 12, no. 1, pp. 91-134, March 2003.
  ps, pdf, bib


• V. Kanitkar, and A. Delis,
  ``Real-Time Processing in Client-Server Databases,''
  IEEE Transactions on Computers,
  vol. 51, no. 3, pp. 269-287, March 2002.
  pdf, bib


• G. Kollios, D. Gunopulos, V.J. Tsotras, A. Delis, and M. Hadjieleftheriou,
  ``Indexing Animated Objects Using Spatiotemporal Access Methods,''
  IEEE Transactions on Knowledge and Data Engineering,
  vol. 13, no. 5, pp. 758-777, September/October 2001.
  pdf, bib


• J.H. Park, V. Kanitkar, and A. Delis,
  ``Logically Clustered Architectures for Networked Databases,''
  Distributed and Parallel Databases,
  vol. 10, no. 2, pp. 161-198, September 2001.
  pdf, bib


• V. Kanitkar, and A. Delis,
  ``Time Constrained Push Strategies in Client-Server Databases,''
  Distributed and Parallel Databases,
  vol. 9, no. 1, pp. 11-36, January 2001.
  pdf, bib


• I. Rigoutsos, and A. Delis,
  ``Managing Statistical Behavior of Large Data Sets in Shared-Nothing Architectures,''
  IEEE Transactions on Parallel and Distributed Systems,
  vol. 9, no. 11, pp. 1073-1088, November 1998.
  pdf, bib


• A. Delis, and N. Roussopoulos,
  ``Techniques for Update Handling in the Enhanced Client-Server DBMS,''
  IEEE Transactions on Knowledge and Data Engineering,
  vol. 10, no. 3, pp. 458-476, May/June 1998.
  pdf, bib


• A. Delis, and Q. LeViet,
  ``Contemporary Access Structures Under Mixed-Workloads,''
  The Computer Journal, Oxford University Press,
  vol. 40, no. 4, pp. 183-193, November 1997.


• W. Thomas, A. Delis, and V. R. Basili,
  ``An Analysis of Errors in a Reuse-Oriented Development Environment,''
  The Journal of Systems and Software,
  vol. 38, no. 3, pp. 1-14, September 1997.


• M. Papazoglou, A. Delis, A. Bouguettaya, and M. Haghjoo,
  ``Class Library Support for Workflow Environments and Applications,''
  IEEE Transactions on Computers,
  vol. 46, no. 6, pp. 1-14, June 1997.


• A. Beeharry, A. Bouguettaya, and A. Delis,
  ``On Distributed Persistent Objects for Interoperable Datastores,''
  Information Sciences, An International Journal,
  vol. 91, no. 1-2, pp. 1-32, May 1996.


• M. Papazoglou, A. Delis, and B. Kramer,
  ``Use of Middleware Facilities in Interoperable Databases,''
  Journal of Computer Systems Science and Engineering,
  vol. 10, no. 4, pp. 195-206, October 1995.


• E. A. Delis, and A. Delis,
  ``Automatic Fire-Code Checking using Expert System Technology,''
  Journal of Computing in Civil Engineering, American Society of Civil Engineers (ASCE),
  vol. 9, no. 2, pp. 141-157, April 1995.


• L. Raschid, T. Sellis, and A. Delis,
  ``A Simulation-Based Study on the Concurrent Execution of Rules in a Database Environment,''
  Journal of Parallel and Distributed Computing,
  vol. 20, no. 1, pp. 20-42, January 1994.


• A. Delis, and N. Roussopoulos,
  ``Performance Comparison of Three Modern DBMS Architectures,''
  IEEE Transactions on Software Engineering,
  vol. 19, no. 2, pp. 120-138, February 1993.


• A. Delis, and V. R. Basili,
  ``Ada Reusability and System Design Assessment using the Data Binding Tool,''
  International Journal of Software Engineering and Knowledge Engineering ,
  vol. 3, no. 3, pp. 287-318, November 1993.


• E. A. Delis, and A. Delis,
  ``An Expert System for Fire-Code Checking: Design, Implementation and Geometric Algorithms,''
  International Journal of Artificial Intelligence Tools,
  vol. 1, no. 4, pp. 597-627, December 1992.



• M. Fragouli and A. Delis,
  ``EasyTransport: An Effective Navigation and Transportation Guide for Wide Geographic Areas'',
  14th IEEE International Conference on Tools with Artificial Intelligence,
  Washington DC, November 2002.


• V. Kalogeraki, A. Delis, and D. Gunopoulos,
  ``Handing Multimedia Streams in a Peer-to-Peer Network'',
  Proceedings of the 2nd IEEE International Workshop on Global and Peer to Peer Computing on Large Scale Distributed Systems,
  Berlin, Germany, May 2002.


• R.D. Regan, and A. Delis,
  ``An Analysis of Main-Memory and Log Space Usage in Extended Ephemeral Logging,''
  Proceedings of the 18th British National Conference on Databases (BNCOD01),
  Oxford, United Kingdom, July 2001.


• J.H. Park, and A. Delis,
  ``On-line Realignment of Clients in Networked Databases,''
  Proceedings of the 21st IEEE International Conference on Distributed Computing Systems (IEEE-ICDCS),
  Mesa, AZ, April 2001.


• V. Kanitkar, and A. Delis,
  ``Site Selection for Real-Time Client Request Handling,''
  Proceedings of the 1999 IEEE International Conference on Distributed Computing Systems (IEEE-ICDCS),
  Austin, TX, May/June 1999.


• A. Delis, V. Kanitkar, and G. Kollios,
  ``Database Architectures,''
  in Encyclopedia of Electrical and Electronics Engineering John Webster, Editor, John Wiley and Sons,
  New York, NY, February 1999.
  ps, pdf, bib


• V. Kanitkar, and A. Delis,
  ``Two-Stage Transaction Processing in Client-Server DBMSs,''
  Proceedings of the 7th IEEE Symposium on High-Performance Distributed Computing (IEEE-HPDC),
  Chicago, IL, July 1998.


• J.H. Park, and A. Delis,
  ``The Effect of Clustering in Client-Caching Architectures,''
  Proceedings of the 7th IEEE Symposium on High-Performance Distributed Computing (IEEE-HPDC),
  Chicago, IL, July 1998.


• V. Kanitkar, and A. Delis,
  ``Real-Time Client-Server Push Strategies: Specification and Evaluation,''
  Proceedings of IEEE Real-Time Applications Symposium (IEEE-RTAS),
  Denver, Colorado, June 1998.


• V. Kanitkar, and A. Delis,
  ``A Case for Real-Time Client-Server Databases,''
  Proceedings of the 2nd International Real-Time Database Workshop(RTB),
  Burlington, Vermont, September, 1997.


• M. Papazoglou, A. Delis, M. Haghjoo, and A. Bouguettaya,
  ``Language Support for Long-Lived Concurrent Activities,''
  Proceedings of the 16th International IEEE Conference in Distributed Computing Systems (IEEE-ICDCS),
  Hong Kong, June 1996.


• I. Rigoutsos, and A. Delis,
  ``The Impact of Hashing Function Choice on the Load Balancing in Very Large Datasets,''
  8th International Conference on Software Engineering and Knowledge Engineering (SEKE),
  Lake Tahoe, Nevada, June 1996.


• A. Delis,
  ``Database Computing on Clusters of Workstations,''
  International Symposium on Software Engineering for the Next Generation, Information Processing Society of Japan,
  Nagoya, Japan, February 1996.


• S. Milliner, and A. Delis,
  ``Networking Abstractions and Protocols Under Variable Length Messages,''
  Proceedings of the 1995 IEEE International Conference on Network Protocols (IEEE-ICNP),
  Tokyo, Japan, November 1995.


• A. Delis, and N. Roussopoulos,
  ``The Page-Server versus the Enhanced Client-Server DBMS,''
  Proceedings of International Symposium on Advanced Database Technologies and Their Integration,
  Nara, Japan, October 1994.


• A. Delis, and N. Roussopoulos,
  ``Management of Updates in the Enhanced Client-Server DBMS,''
  Proceedings of the 14th International IEEE Conference in Distributed Computing Systems (IEEE-ICDCS),
  Poznan, Poland, June 1994.


• A. Delis, and N. Roussopoulos,
  ``Performance and Scalability of Client-Server Database Architectures,"
  The 18th International Conference in Very Large Data Bases (VLDB),
  Vancouver, British Columbia, Canada, August 1992.


• N. Roussopoulos, C. Chen, S. Kelley, A. Delis, and Y. Papakonstantinou,
  ``The ADMS Project: Views R Us,''
  IEEE Bulletin on Data Engineering,
  vol. 18, no. 2, pp. 19-28, June 1995.


• N. Roussopoulos, and A. Delis,
  ``Modern Client-Server DBMS Architectures,"
  Association for Computing Machinery, Bulletin of SIGMOD Record,
  vol. 20, no. 3, pp. 52-61, September 1991.