Eleftherios Tiakas

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Post-doc researcher

Data Engineering Lab

Department of Informatics
Aristotle University of Thessaloniki
54124 Thessaloniki, Greece
email:
tiakas@csd.auth.gr

 

Eleftherios Tiakas received a B.Sc. in Mathematics in 1994 from the Department of Mathematics, Faculty of Sciences, Aristotle University of Thessaloniki. In 2004 he was appointed by the Ministry of Education, through Supreme Council for Civil Personnel Selection, as a permanent Teacher of Mathematics in Secondary Education. In 2006 he received a B.Sc. in Computer Science – Informatics and a M.Sc. in Computer Science with focus on Information Systems. In 2011 he received a Ph.D. from the Department of Informatics, Faculty of Sciences, Aristotle University of Thessaloniki. From 2011 until now he has been a postdoctoral researcher and adjunct lecturer in the Department of Informatics, AUTH. His areas of research interest include: Query Processing, Indexing, Databases, Spatial and Multidimensional Databases, Data Structures, Data Mining, Information Retrieval, Similarity Search, Social Networks, Bio-Informatics. He is the author of two theses (M.Sc. and Ph.D.). He is the author/co-author of 12 articles published in international journals, 15 papers published in international conference proceedings, and 2 book chapters. His publications have already received over 300 citations from other scientific publications. He participated in 10 research projects and programs funded by the European Union and Greece. Also, he was responsible for supervising two theses during his PhD, and 3 postgraduate theses after. Finally, from 2007 until now, he also serves as a regular/external reviewer in several international journals and conferences.

Extended CV

 

 

Teaching

Publications

Projects

 

 


Teaching

Postgraduate Courses (pages in Greek):

·         Spring 2017:  Databases and Data Mining

·         Fall 2016:       Spatial and Multimedia Databases

·         Spring 2015:  Advanced Data Indexing

Teaching Assistant for the Undergraduate Courses (pages in Greek):

·         Spring 2017:  Data Structures

·         Fall 2016:       Basic Programming Principles

·         Fall 2016:       Databases

·         Fall 2015:       Databases

·         Fall 2014:       Databases

·         Fall 2013:       Databases

 


Publications

Partial list of publications and citations from Google Scholar.

Partial list of publications from the Data Engineering Lab, Department of Informatics, Aristotle University of Thessaloniki, Greece.

Partial list of publications from DBLP.

Partial list of publications from the Collection of Computer Science Bibliographies.

Partial list of publications and citations from Microsoft Academic Search.

Partial list of publications from DBLife.

 

Journal Articles

 

[J12] Dimitris Zianis, Gavriil Spyroglou, Eleftherios Tiakas, Kalliopi Radoglou. "Bayesian and classical models to predict aboveground tree biomass allometry", Forest Science Journal, vol. 62, no. 3, pp. 247-259, June 2016.

[J11] Eleftherios Tiakas, George Valkanas, Apostolos N. Papadopoulos, Yannis Manolopoulos, Dimitrios Gunopulos. "Processing Top-k Dominating Queries in Metric Spaces", Transactions on Database Systems (ACM), vol. 40, no. 4, 38 pages, article 23, January 2016.

[J10] Zaigham Faraz Siddiqui, Eleftherios Tiakas, Panagiotis Symeonidis, Myra Spiliopoulou, Yannis Manolopoulos. "Learning Relational User Profiles and Recommending Items as Their Preferences Change", International Journal on Artificial Intelligence Tools (World Scientific Publishing Company), vol. 24, no. 2, 31 pages, April 2015.

[J9] Nantia Iakovidou, Eleftherios Tiakas, Konstantinos Tsichlas, Yannis Manolopoulos. "Going over the three dimensional protein structure similarity problem", Artificial Intelligence Review (Springer), vol. 42, no. 3, pp. 445-459, October 2014.

[J8] Panagiotis Symeonidis, Eleftherios Tiakas. "Transitive node similarity: predicting and recommending links in signed social networks", World Wide Web Journal (Springer), vol. 17, no. 4, pp. 743-776, July 2014.

[J7] Eleftherios Tiakas, Apostolos N. Papadopoulos, Yannis Manolopoulos. "On Estimating the Maximum Domination Value and the Skyline Cardinality of Multi-Dimensional Data Sets", International Journal of Knowledge-Based Organizations (IGI Global), vol. 3, no. 4, pp. 61-83, October 2013.

[J6] Eleftherios Tiakas, Dimitrios Rafailidis, Anastasios Dimou, Petros Daras. "MSIDX: Multi-Sort Indexing for Efficient Content-Based Image Search and Retrieval", Transactions on Multimedia (IEEE), vol. 15, no. 6, pp. 1415-1430, October 2013.

[J5] Panagiotis Symeonidis, Eleftherios Tiakas, Yannis Manolopoulos. "A unified framework for link and rating prediction in multi-modal social networks", International Journal of Social Network Mining (Inderscience), vol. 1, no. 3/4, pp. 225-253, January 2013.

[J4] Eleftherios Tiakas, Apostolos N. Papadopoulos, Yannis Manolopoulos. "Progressive processing of subspace dominating queries", The VLDB Journal (Springer), vol. 20, no. 6, pp. 921-948, December 2011.

[J3] Eleftherios Tiakas, Apostolos N. Papadopoulos, Alexandros Nanopoulos, Yannis Manolopoulos. "Node and edge selectivity estimation for range queries in spatial networks", Information Systems (Elsevier), vol. 34, no. 3, pp. 328-352, May 2009.

[J2] Eleftherios Tiakas, Apostolos N. Papadopoulos, Alexandros Nanopoulos, Yannis Manolopoulos, Dragan Stojanovic, Slobodanka Djordjevic-Kajan. "Searching for similar trajectories in spatial networks", Journal of System and Software (Elsevier), vol. 82, no. 5, pp. 772-788, May 2009.

[J1] Eleftherios Tiakas, Stefanos Ougiaroglou, Petros Nicopolitidis. "Efficient algorithms for constructing broadcast disks programs in asymmetric communication environments", Telecommunication Systems (Springer), vol. 41, no. 3, pp. 185-209, May 2009.

 

Papers in Conference Proceedings

 

[C15] Alexander Tzanakas, Eleftherios Tiakas, Yannis Manolopoulos. "Skyline Algorithms on Streams of Multidimensional Data", Proceedings of the 20th East-European Conference on Advances in Databases and Information Systems (Springer / ADBIS), pp. 63-71, Prague, Czech Republic, August 2016.

[C14] Eleftherios Tiakas, Dimitrios Rafailidis. "Scalable Trajectory Similarity Search Based on Locations in Spatial Networks", Proceedings of the 5th International Conference on Model and Data Engineering (Springer / MEDI), LNCS vol. 9344, pp. 213-224, Rhodes, Greece, September 2015.

[C13] Eleftherios Tiakas, Apostolos N. Papadopoulos, Yannis Manolopoulos. "Skyline Queries: an Introduction (invited)", Proceedings of the 6th International Conference on Information, Intelligence, Systems & Applications (IISA), 6 pages, Corfu, Greece, July 2015.

[C12] Eleftherios Tiakas, Apostolos N. Papadopoulos, Yannis Manolopoulos. "Top-k Dominating Queries: a Survey (invited)", Proceedings of the 17th International Symposium on Programming and Systems (ISPS), 10 pages, Algiers, Algeria, April 2015.

[C11] Zaigham Faraz Siddiqui, Eleftherios Tiakas, Panagiotis Symeonidis, Myra Spiliopoulou, Yannis Manolopoulos. "xStreams: Recommending Items to Users with Time-evolving Preferences", Proceedings of the 4th International Conference on Web Intelligence, Mining and Semantics (ACM / WIMS), Article 22, 12 pages, Thessaloniki, Greece, June 2014.

[C10] Eleftherios Tiakas, George Valkanas, Apostolos N. Papadopoulos, Yannis Manolopoulos, Dimitrios Gunopulos: "Metric-Based Top-k Dominating Queries", Proceedings of the 17th International Conference on Extending Database Technology (Open Proceedings / EDBT), pp. 415-426, Athens, Greece, March 2014.

[C9] Nantia Iakovidou, Eleftherios Tiakas, Konstantinos Tsichlas: "DISCO: A New Algorithm for Detecting 3D Protein Structure Similarity", Proceedings of the Artificial Intelligence Applications and Innovations Workshops (Springer / AIAI), pp. 622-631, Halkidiki, Greece, September 2012.

[C8] Panagiotis Symeonidis, Eleftherios Tiakas, Yannis Manolopoulos. "Product recommendation and rating prediction based on multi-modal social networks", Proceedings of the 5th ACM Conference on Recommender Systems (ACM / RECSYS), pp. 61-68, Chicago, IL, USA, October 2011.

[C7] Zaigham Faraz Siddiqui, Myra Spiliopoulou, Panagiotis Symeonidis, Eleftherios Tiakas. "A Data Generator for Multi-Stream Data", Proceedings of the 2nd International Workshop on Mining Ubiquitous and Social Environments (Springer / MUSE), pp. 63-70, Athens, Greece, September 2011.

[C6] Panagiotis Symeonidis, Eleftherios Tiakas, Yannis Manolopoulos. "Transitive node similarity for link prediction in social networks with positive and negative links", Proceedings of the 4th ACM Conference on Recommender Systems (ACM / RECSYS), pp. 183-190, Barcelona, Spain, September 2010.

[C5] Eleftherios Tiakas, Apostolos N. Papadopoulos, Yannis Manolopoulos. "Estimation of the Maximum Domination Value in Multi-dimensional Data Sets", Proceedings of the 14th East-European Conference on Advances in Databases and Information Systems (Springer / ADBIS), pp. 505-519, Novi Sad, Serbia, September 2010.

[C4] Eleftherios Tiakas, Apostolos N. Papadopoulos, Yannis Manolopoulos. "Graph Node Clustering via Transitive Node Similarity", Proceedings of the 14th Panhellenic Conference on Informatics (IEEE / PCI), pp. 72-77, Tripoli, Greece, September 2010.

[C3] Eleftherios Tiakas, Apostolos N. Papadopoulos, Alexandros Nanopoulos, Yannis Manolopoulos. "Selectivity estimation in spatial networks", Proceedings of the 23rd Annual Symposium on Applied Computing (ACM / SAC), pp. 852-856, Fortaleza, Ceara, Brazil, March 2008.

[C2] Eletherios Tiakas, Stefanos Ougiaroglou, Petros Nicopolitidis. "Efficient broadcast disks program construction in asymmetric communication environments", Proceedings of the 10th International Symposium on Modelling, Analysis and Simulation of Wireless and Mobile Systems (ACM / MSWiM), pp. 279-283, Chania, Crete Island, Greece, October 2007.

[C1] Eleftherios Tiakas, Apostolos N. Papadopoulos, Alexandros Nanopoulos, Yannis Manolopoulos, Dragan Stojanovic, Slobodanka Djordjevic-Kajan. "Trajectory Similarity Search in Spatial Networks", Proceedings of the 10th International Database Engineering & Applications Symposium (IEEE / IDEAS), pp. 185-192, Delhi, India, December 2006.

 

Book Chapters

 

[CH2] Gavriil Spyroglou, Eleftherios Tiakas, Gregor Chatziphilippidis, Vasiliki Kazana. "The design and use of forest decision support systems in Greece", Computer-based tools for supporting forest management. The experience and the expertise world-wide (Epsilon Open Archive), pp. 152-167, 2014.

[CH1] Theodoros Semertzidis, Dimitrios Rafailidis, Eleftherios Tiakas, Michael G. Strintzis, Petros Daras. "Multimedia Indexing, Search and Retrieval in Large Databases of Social Networks", Social Media Retrieval, Computer Communications and Networks series (Springer), pp. 43-63, 2012.

 

Technical Reports

 

[TR1] Alexander Tzanakas, Eleftherios Tiakas, Yannis Manolopoulos. "Revisited skyline query algorithms on streams of multidimensional data", Technical Report, Aristotle University of Thessaloniki, 2016.

 

Theses

 

[TH3] Eleftherios Tiakas: "Similarity and domination query processing in multidimensional spaces", Ph.D. thesis, Department of Informatics, Aristotle University (in Greek), 2011.

[TH2] Eleftherios Tiakas: "Trajectory similarity range queries in spatial networks", Postgraduate thesis, Department of Informatics, Aristotle University (in Greek), 2006.

[TH1] Eleftherios Tiakas: "Computing trajectory similarity with metric relations in spatial networks", Thesis, Department of Informatics, Aristotle University (in Greek), 2006.

 


Participation/Involvement in Research Projects and Programmes

 

·         23/11/2016 - 28/2/2017: Research Project (no. 91877) with title: “Postgraduate Studies Programme “Information and Communication Technologies””, Special Account for Research Funds, AUTH.

Adjunct Lecturer (contracted) of the postgraduate course: “Spatial and Multimedia Databases” of the Department of Informatics, AUTH, for the fall semester of 2016.

·         8/4/2015 - 30/6/2015: Research Project (no. 21455) with title: “Services to connect undergraduate and graduate students with the market”, Special Account for Research Funds, AUTH.

Adjunct Lecturer (contracted) of the postgraduate course: “Advanced Data Indexing” of the Department of Informatics, AUTH, for the spring semester of 2015.

·         19/2/2015 - 30/6/2015: Research Project (no. 90410) with title: “15th International Conference on Web Information System Engineering (WISE 2014)”, Special Account for Research Funds, AUTH.

Assistant Editor and Internal Reviewer for the selection of papers from the workshops of the conference WISE 2014, and their publication in a post-proceedings volume by Springer.

·         1/8/2014 - 31/12/2014: Research Project (no. 89663) with title: “26th International Conference on Advanced Information Systems Engineering (CAISE 2014)”, Special Account for Research Funds, AUTH.

Assistant Editor and Internal Reviewer for the selection of papers from the proceedings of the conference CAISE 2014, and their publication in a special issue of the Requirements Engineering Journal by Springer.

·         9/11/2013 - 6/3/2014: Research Project (no. 89503) with title: “14th International Conference of Engineering Applications of Neural Networks (EANN)”, Special Account for Research Funds, AUTH.

Assistant Editor and Internal Reviewer for the selection of papers from the proceedings of the conference EANN, and their publication in special issues of the scientific journals: Information Sciences and Neurocomputing, by Elsevier.

·         2/4/2012 - 9/12/2012: Research Project 3Dlife.

3DLife is a network of excellence funded by the European Union under THEME ICT-2009.1.5 “Networked Media and 3D Internet” of the 7th Framework Programme. 3DLife's ultimate target is to lay the foundations of a European Competence Centre under the name "Excellence in Media Computing & Communication" or simply EMC2.

Researcher in 3DLife-EMC2 on a research project with title: “Multi-Sort Indexing for Image Similarity Search”, in the area of Media Computing & Communication and in cooperation with Information Technologies Institute (ITI). After the successful completion of the research, E. Tiakas received a scholarship and a fellowship diploma from Queen Mary University of London.

·         1/1/2011 - 31/12/2012: Research Programme for the promotion of the exchange and scientific cooperation between Greece and Germany (IKYDA 2011) with title: “Recommender Systems in Web2.0”.

Scientific cooperation between universities: (1) AUTH, and (2) Otto-von-Guericke University, Magdemburg, Germany. The programme was funded by the Greek State Scholarships Foundation (IKY).

Researcher – Member of the Greek research team. E. Tiakas designed and implemented a recommendation system by combining social networks’ data, social tags, user ratings and profiles.

·         26/1/2009 - 26/4/2013: Four-year European Research Project: FPS COST Action FP0804, Forest Management Decision Support Systems (FORSYS 2009-2013).

The main objective of FORSYS was the development of a European procedural framework, information standards and guidelines, for the design, implementation, testing, evaluation as well as the application of Decision Support Systems (DSS) for forest management and multifunctional problems of Forestry. In addition, to determine the requirements for the application of DSS and to offer a consistent EU-wide quality reference point for the development of DSS for forest management. In this cost action, 24 countries participated along with Greece, with national representatives, and 10 more institutions that do not belong in the EU. It was funded by the European Commission, as part of the EU RTD Framework Programme.

Researcher and active workgroup member in WG1: DSS architecture and design, during the four years. Moreover, E. Tiakas participated in almost all the meetings of the Working Groups, which took place in various cities of the European Union.

·         4/12/2003 - 4/8/2004: Research Project with title: “Enhancing Computer Studies at the Department of Applied Informatics, University of Macedonia of Economic and Social Sciences”.

The project was implemented under the Operational Programme for Education and Initial Vocational Training (O.P. “Education”). O.P. "Education" is one of the Third Community Support Framework’s 24 Operational Programmes (2000-2006) in Greece, and is co-financed by the European Social Fund, the European Regional Development Fund and national resources.

E. Tiakas worked as a programmer in this project (contracted), where: (i) he developed web applications and web databases that were hosted on the website of University of Macedonia for the support of the educational work and the promotion of the Postgraduate Studies Programme, (ii) he updated the website of University of Macedonia with educational material from the various courses of the Postgraduate Studies Programme of the Department of Applied Informatics of University of Macedonia, (iii) he checked, corrected and updated the lecture notes of the courses “Design and Analysis of Algorithms” of the Undergraduate and the Postgraduate Curriculum of the Department of Applied Informatics of University of Macedonia.

·         1/11/2003 - 15/12/2003: Research Project “ITM” funded by the European Union in collaboration with the Forest Research Institute of Thessaloniki and the University of Vienna (BOKU).

Researcher and Programmer (contracted) on design and implementation of a forest model management/simulator with 3D graphics visualization capabilities using C++ and DirectX. E. Tiakas developed a complete forest management simulation software package entitled “DRYMOS” with the following main features: (i) modeling and visualization of forest stands by using DirectX 3D graphics, (ii) database management of forest stands data, (iii) prediction and simulation of the evolution of the forest stands in time, (iv) support of interactive tree plantings, tree thinning, snow damages, regenerations into the stand, and various forestry scenarios. The development of this software was made in the Forest Research Institute of Thessaloniki and it was also presented at the National Agricultural Research Foundation (N.AG.RE.F.).

 


Last modified: 5 March 2017