Tsirakis Nikos

Computer and Informatics Engineer, PhD

Department of Computer Engineering & Informatics - University of Patras.
Rio 26500 Greece, Office: Prokat 304.

phone, Phone (Office): +30 2610 997529

News

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Research Interests

Information Retrieval, design and analysis of Data Mining algorithms and applications (mainly for huge data manipulation ex. Data Bases, Data Streams, XML Data), String algorithmics and data structures, social networks, Hypertext modeling and searching, Software Quality Assessment and finally Web Technologies.

Publications

Journals
  • G. Gkotsis, N. Karacapilidis and N. Tsirakis, "On the exploitation of relationships in online communities of practice", International Journal of Collaborative Enterprise, Special Issue on Collaborative Technologies and Applications, Vol. 2, No 1, 2011, pp. 75–86.
  • Y. Kanellopoulos, P. Antonellis, C. Tjortjis, C. Makris, N. Tsirakis, “k-Attractors: A Partitional Clustering Algorithm for Numeric Data analysis”, Applied Artificial Intelligence (AAI), Vol. 25 No.1, 2011, (Taylor & Francis) ISSN: 0883-9514. pdf
  • Yiannis Kanellopoulos, Panagiotis Antonellis, Dimitris Antoniou, Christos Makris, Evangelos Theodoridis, Christos Tjortjis, Nikos Tsirakis “Code Quality Evaluation Methodology Using The ISO/IEC 9126 Standard” International Journal of Software Engineering and Applications, 1(3):17–36, July 2010. pdf
  • E. Sakkopoulos, D. Antoniou, P. Adamopoulou, N. Tsirakis and A. Tsakalidis, “A web personalizing technique using adaptive data structures: The case of bursts in web visits”, Journal of Systems and Software 83(11): 2200-2210 (2010)
  • Antonellis P., Makris C., Tsirakis N., “Algorithms for Clustering ClickStream Data”, Information Processing Letters (IPL), (Elsevier), Volume 109, Issue 8, 31 March 2009, Pages 381-385 pdf
  • Antonellis P., Antoniou D., Kanellopoulos Y., Makris C., Theodoridis E., Tjortjis C., Tsirakis N., “Clustering for Monitoring Software Systems Maintainability Evolution”, Electronic Notes in Theoretical Computer Science, (Elsevier), Vol. 233, March 2009, pp. 43-57, ISSN 1571-0661 pdf
Conferences
  • Antonellis Panagiotis, Christos Makris, Yannis Plegas, Nikos Tsirakis, "Distributed Semantic XML Filtering on Peer-to-Peer Networks", WEBIST 2013 (to appear)
  • G. Gkotsis, N. Karacapilidis, C. Pappis, N. Tsirakis, "Towards a Meaningful Exploitation of Important Relationships Among Community Members and Collaboration Assets" in the Proceedings of the IADIS International Conference on WWW/Internet 2010 (IADIS ICWI). Timisoara - Romania pp. 298-302, 2010 pdf
  • P. Antonellis, C. Makris, N. Tsirakis, "Utilizing XML Clustering for Efficient XML Data Management on P2P Networks," to appear in the proceedings of 20th International Conference on Database and Expert Systems Applications, DEXA 2009 pdf
  • Panos Antonellis, Dimitris Antoniou, Yiannis Kanellopoulos, Christos Makris, Christos Tjortjis, Vangelis Theodoridis, Nikos Tsirakis, "Code4Thought Project: Employing the ISO/IEC-9126 Standard for Software Engineering-Product Quality Assessment," csmr, pp. 297-300, 2009 European Conference on Software Maintenance and Reengineering, 2009 pdf
  • Παπαθανασίου Α., Τσακαλίδης Α., Τσιράκης Ν., “Μελέτη Εφαρμογών Γεωγραφικών Συστημάτων Πληροφοριών σε Ομότιμο Πειρβάλλον” 5ο Πανελλήνιο Συνέδριο, Γεωγραφικά Συστήματα Πληροφοριών Περιβάλλον και Aνάπτυξη, Αθήνα 2008. pdf
  • Antonellis P., Antoniou D., Theodoridis E., Kanellopoulos Y., Makris C., Tjortjis C., Tsirakis N., “Employing Clustering for Assisting Source Code Maintainability Evaluation according to ISO/IEC-9126” Artificial Intelligence Techniques in Software Engineering Workshop (AISEW 2008) in ECAI08. pdf
  • P. Antonellis, D. Antoniou, Y. Kanellopoulos, C. Makris, E. Theodoridis, C. Tjortjis, N. Tsirakis. “Monitoring the Evolution of Software Systems Maintainability” (short version). Workshop on System Quality and Maintainability, organized in conjunction with the 12th European Conference on Software Maintenance and Reengineering, CSMR 2008 pdf
  • P. Antonellis, C. Makris and N. Tsirakis. “XEdge: Clustering Homogeneous and Heterogeneous XML Documents Using Edge Summaries”. ACM Annual Symposium on Applied Computing (ACM SAC ’08) 2008 pdf
  • P. Antonellis, D. Antoniou, Y. Kanellopoulos, C. Makris, E. Theodoridis, C. Tjortjis and N. Tsirakis. “A Data Mining Methodology for Evaluating Maintainability according to ISO/IEC-9126 Software Engineering-Product Quality Standard”. Special Session on System Quality and Maintainability, organized in conjunction with the 11th European Conference on Software Maintenance and Reengineering, CSMR 2007 pdf
  • Ch.V. Katsiropoulos, N. Tsirakis, G.N. Labeas, Sp.G. Pantelakis “Optimization of the 'cold' diaphragm forming process by means of an extensive cost analysis study”, In: Proc. of the 28th International Conference and Forums (SAMPE Europe), Paris, April 02-04, 2007, pp. 645-650.pdf
  • Christos Makris, Nikos Tsirakis. “A model for clustering clickstream data”. International Workshop on architectures, models and infrastructures to generate semantics in Peer to Peer and Hypermedia Systems of ACM Hypertext 2006 pdf
  • Nikos Tsirakis, Nikos Karousos, George Gkotsis: “Issues of Usability in Hypermedia Systems: A Usability Estimation Questionnaire for Hypermedia Designers”. Proceedings of the Metainformatics 2005, 169-180. ACM International Conference Proceeding Series, Vol. 214 pdf
  • D.Antoniou. Y.Panagis, E.Theodoridis. A. Tsakalidis and N.Tsirakis. “Algorithms and Data Structures for managing molecular sequences”. 1st Conference on Biosciences of the University of Patras. May 2005.
  • Nikos Karousos, Nikos Tsirakis: “Assessing the Impacts of Open Hypermedia Problems on Structural Computing”. In Metainformatics 2004, 108-112pdf
Poster Abstracts
  • Nikos Tsirakis, “Applying data mining techniques for measuring software quality”. Summer School on Algorithmic Data Analysis (SADA07), Helsinki, Finland, 28 May - 1 June 2007 pdf
Chapters
  • George Gkotsis, Nikos Tsirakis, “Mining unnoticed knowledge in collaboration support systems”, Book chapter in Advances in Web-based Learning (AWBL) Book Series by Idea Group Inc., 2010 edition.
  • Nikos Tsirakis, “Image Watermarking”, Book chapter in Digital Rights Management for E-Commerce Systems to be published by Idea Group Inc., 2009 edition.
  • Christos Makris, Nikos Tsirakis, “Clustering Algorithms for Data Streams”, chapter in Encyclopedia of Information Science and Technology, Second Edition, 2008 edition.

Teaching

Research Community Services

miscellanea

Some useful links:

Erdős Number:

My current Erdős number is 4. The path is:
  • Nikos Tsirakis
  • Christos H. Makris
  • Alexis C. Kaporis
  • Nicholas C. Wormald