Computer and Informatics Engineer, MSc, 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
  • Makrynioti N., Grivas A., Sardianos C., Tsirakis N. , Varlamis I. , Vassalos V., Poulopoulos V., Tsantilas P. (2017) PaloPro: a platform for knowledge extraction from big social data and the news. International Journal of Big Data Intelligence, 4 (1), 3-22. doi:10.1504/IJBDI.2017.081185
  • Tsirakis N., Varlamis I., Poulopoulos V., Tsantilas P. (2017, May) Large scale opinion mining for social, news and blog data. Journal of Systems and Software, 127 (C), 237-248. doi:10.1016/j.jss.2016.06.012
  • Gkotsis G., Karacapilidis N., Tsirakis N. (2011, June) On the exploitation of relationships in online communities of practice. International Journal of Collaborative Enterprise, 2 (1), 75-86. doi:10.1504/IJCENT.2011.040666
  • Kanellopoulos Y., Antonellis P., Tjortjis C., Makris C., Tsirakis N. (2011, February) k-Attractors: A Partitional Clustering Algorithm for Numeric Data analysis. Applied Artificial Intelligence, 25 (2), 97-115. doi:10.1080/08839514.2011.534590 pdf
  • Kanellopoulos Y., Antonellis P., Antoniou D., Makris C., Theodoridis E., Tjortjis C. & Tsirakis N. (2010, July) Code Quality Evaluation Methodology Using The ISO/IEC 9126 Standard. International Journal of Software Engineering & Applications, 1 (3), 17–36. doi:10.5121/ijsea.2010.1302 pdf
  • Sakkopoulos E., Antoniou D., Adamopoulou P., Tsirakis N. & Tsakalidis A. (2010, November) A web personalizing technique using adaptive data structures: The case of bursts in web visits. Journal of Systems and Software, 83 (11), 2200-2210. doi:10.1016/j.jss.2010.06.026
  • Antonellis P., Makris C., Tsirakis N. (2009, March) Algorithms for Clustering ClickStream Data. Information Processing Letters, 109 (8), 381-385. doi:10.1016/j.ipl.2008.12.011 pdf
  • Antonellis P., Antoniou D., Kanellopoulos Y., Makris C., Theodoridis E., Tjortjis C. & Tsirakis N. (2009, March). Clustering for Monitoring Software Systems Maintainability Evolution. Electronic Notes in Theoretical Computer Science, 233, 43-57. doi:10.1016/j.entcs.2009.02.060 pdf
Conferences
  • N. Tsirakis, V. Poulopoulos, P. Tsantilas, I. Varlamis", A platform for real-time opinion mining from social media and news streams", to appear in the 1st IEEE International Workshop on Real Time Data Stream Analytics (RTStreams 2015), held in conjunction with IEEE BigDataSE-15, 20-22 Aug, 2015, Helsinki, Finland.
  • I. Varlamis, N. Tsirakis, V. Poulopoulos, P. Tsantilas, "An Automatic Wrapper Generation Process for Large Scale Crawling of News Websites" In 18th Panhellenic Conference on Informatics, PCI 2014, 2-4 Oct, 2014, Athens, Greece.
  • G. Petasis, D. Spiliotopoulos, N. Tsirakis, P. Tsantilas, "Sentiment Analysis for Reputation Management: Mining the Greek Web" In 8th Hellenic Conference on Artificial Intelligence pp. 27-340, SETN 2014, 15-17 May, 2014, Ioannina, Greece.
  • G. Petasis, D. Spiliotopoulos, N. Tsirakis, P. Tsantilas, "Large-scale Sentiment Analysis for Reputation Management" In PATHOS 2013 Workshop, GSCL 2013, 25-27 September, 2013, Darmstadt, Germany.
  • Antonellis, P., Kontopoulos, S., Makris, C., Plegas, Y., Tsirakis, N. (2013). Semantic XML Filtering on Peer-to-Peer Networks using Distributed Bloom Filters. In Proceedings of the 9th International Conference on Web Information Systems and Technologies - Volume 1: WEBIST. doi:10.5220/0004363301330136
  • Gkotsis, G., Karacapilidis, N., Pappis, C., Tsirakis, N. (2010). Towards a Meaningful Exploitation of Important Relationships Among Community Members and Collaboration Assets. In: B. White, P. Isaias and D. Andone (eds.), Proceedings of the IADIS International Conference WWW/Internet 2010, Timisoara, Romania, October 14-17, pp. 298-302. pdf
  • Antonellis, P., Makris, C., Tsirakis, N. (2009). Utilizing XML Clustering for Efficient XML Data Management on P2P Networks. In: Bhowmick S.S., Küng J., Wagner R. (eds) Database and Expert Systems Applications. DEXA 2009. Lecture Notes in Computer Science, vol 5690. Springer, Berlin, Heidelberg. doi:10.1007/978-3-642-03573-9_6 pdf
  • Antonellis, P., Antoniou, D., Kanellopoulos, Y., Makris, C., Tjortjis, C., Theodoridis, V., Tsirakis, N. (2009, March) Code4Thought Project: Employing the ISO/IEC-9126 Standard for Software Engineering-Product Quality Assessment. 13th European Conference on Software Maintenance and Reengineering, CSMR 2009, Architecture-Centric Maintenance of Large-SCale Software Systems, Kaiserslautern, Germany, 24-27 March 2009. pp. 297-300. doi:10.1109/CSMR.2009.32 pdf
  • Παπαθανασίου, Α., Τσακαλίδης, Α., Τσιράκης, Ν. (2008). Μελέτη Εφαρμογών Γεωγραφικών Συστημάτων Πληροφοριών σε Ομότιμο Περιβάλλον. 5ο Πανελλήνιο Συνέδριο, Γεωγραφικά Συστήματα Πληροφοριών Περιβάλλον και Aνάπτυξη. pdf
  • Antonellis, P., Antoniou, D., Theodoridis, E., Kanellopoulos, Y., Makris, C., Tjortjis, C., Tsirakis, N. (2008, July). Employing Clustering for Assisting Source Code Maintainability Evaluation according to ISO/IEC-9126. Artificial Intelligence Techniques in Software Engineering Workshop in ECAI08. doi:10.13140/2.1.4161.6324. pdf
  • Antonellis, P., Antoniou, D. ,Kanellopoulos, Y., Makris, C., Theodoridis, E., Tjortjis, C., Tsirakis, N. (2008). Monitoring the Evolution of Software Systems Maintainability. System Quality and Maintainability workshop, organized in conjunction with the 12th European Conference on Software Maintenance and Reengineering. pdf
  • Antonellis, P., Makris, C., Tsirakis, N. (2008). XEdge: Clustering Homogeneous and Heterogeneous XML Documents Using Edge Summaries. In Proceedings of the 2008 ACM Symposium on Applied Computing, pp. 1081-1088. doi:10.1145/1363686.1363940 pdf
  • Antonellis, P., Antoniou, D., Kanellopoulos, Y., Makris, C., Theodoridis, E., Tjortjis, C., Tsirakis, N. (2007). A Data Mining Methodology for Evaluating Maintainability according to ISO/IEC-9126 Software Engineering-Product Quality Standard. 11th European Conference on Software Maintenance and Reengineering, pp. 81-89. pdf
  • Katsiropoulos, Ch., Tsirakis, N., Labeas, G., Pantelakis, S. (2007, April). Optimization of the 'cold' diaphragm forming process by means of an extensive cost analysis study. In Proceedings of the 28th International Conference and Forums SAMPE, Paris, pp. 645-650. pdf
  • Makris, C., Tsirakis, N. (2006). 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 pdf
  • Tsirakis, N., Karousos, N., Gkotsis G. (2005). Issues of Usability in Hypermedia Systems: A Usability Estimation Questionnaire for Hypermedia Designers. In Proceedings of the 2005 symposia on Metainformatics. ACM, New York, NY, USA, Article 15. doi:10.1145/1234324.1234339 pdf
  • Antoniou, D., Panagis, Y., Theodoridis, E., Tsakalidis, A., Tsirakis, N. (2005). Algorithms and Data Structures for managing molecular sequences. 1st Conference on Biosciences of the University of Patras.
  • Karousos, Ν., Tsirakis, Ν. (2005). Assessing the Impacts of Open Hypermedia Problems on Structural Computing. In: Wiil U.K. (eds) Metainformatics. MIS 2004. Lecture Notes in Computer Science, pp 108-112, vol 3511. Springer, Berlin, Heidelberg. doi:10.1007/11518358_9 pdf
Poster Abstracts
Chapters
  • Antonellis, P., Makris, C., Plegas, Y., Tsirakis, N. (2014). Efficient Algorithms for Clustering Data and Text Streams. In M. Khosrow-Pour (Ed.), Encyclopedia of Information Science and Technology, Third Edition (pp. 1767-1776). Information Science Reference - Imprint of: IGI Publishing. doi:10.4018/978-1-4666-5888-2.ch170
  • Gkotsis, G., Tsirakis, N. (2009). Mining Unnoticed Knowledge in Collaboration Support Systems. In N. Karacapilidis (Ed.), Web-Based Learning Solutions for Communities of Practice: Developing Virtual Environments for Social and Pedagogical Advancement (pp. 83-94). Information Science Reference - Imprint of: IGI Publishing. doi:10.4018/978-1-60566-711-9.ch007
  • Tsirakis, Ν. (2009). Image Watermarking, In L. Drossos, D. Tsolis, S. Sioutas and T. Papatheodorou (Ed.), Digital Rights Management for E-Commerce Systems (pp. 55-69). Information Science Reference - Imprint of: IGI Publishing. doi:10.4018/978-1-60566-118-6.ch003
  • Makris, C., Tsirakis, N. (2009) Clustering Algorithms for Data Streams. In M. Khosrow-Pour (Ed.), Encyclopedia of Information Science and Technology, Second Edition (pp. 566-571). Information Science Reference - Imprint of: IGI Publishing. doi:10.4018/978-1-60566-026-4.ch092

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