Intro

I was born in Eleftheroupolis (also known as Pravi), a small town near Kavala city. I obtained my 5-year diploma from the Department of Computer Engineering and Informatics, University of Patras, Greece and my PhD from the Department of Informatics, Aristotle University of Thessaloniki, Greece. Since May 2016, I am an Associate Professor with the Department of Informatics of Aristotle University. According to Google Scholar my h-index is 25 and according to American Mathematical Society my Erdős number is 3.

Research Interests

My current research interests span the fields of DATABASES and DATA MINING. In particular, I am interested in efficient query processing techniques in database systems (multidimensional data management, spatio-temporal data management), algorithms for mining graphs (dense subgraph discovery, frequent subgraphs, hidden graphs, probabilistic graphs), parallel and distributed techniques for massive data sets using Spark and Hadoop, and data management and mining over data streams.

Tutorials

Core Decomposition of Networks: concepts, algorithms and applications, to be presented in the International Conference on Data Mining (ICDM) , Barcelona, Spain, December 2016 (with Fragkiskos Malliaros and Michalis Vazirgiannis). Tutorial acceptance ratio: submitted 17, accepted 4.

Core Decomposition in Graphs: concepts, algorithms and applications, presented in the EDBT/ICDT Joint Conference , Bordeaux, France, March 2016 (with Fragkiskos Malliaros and Michalis Vazirgiannis).
[2page summary (PDF)], [slides (PDF)]

Happy because ...

Based on the work of Tran, Fan and Shahabi published in VLDB 2016 [pdf]: "results show that in most settings, the MCOD algorithm offers the superior performance among all the algorithms, including the most recent algorithm Thresh LEAP". (MCOD is an algorithm that we proposed in ICDE 2011 for detecting distance-based outliers over data streams [ICDE 2011, SIGMOD 2013 demo])

The paper "Metric-Based Top-k Dominating Queries", Proceedings of the 17th International Conference on Extending Database Technology (EDBT), Athens, Greece, 2014: selected as the best paper for publication in ACM Transactions on Database Systems..

The paper "SkyGraph: an algorithm for inportant subgraph discovery in relational graphs", Proceedings of ECML/PKDD, Antwerp, Belgium, 2008: received the Best Knowledge Discovery Paper Award.

Selected Publications

E. Tiakas, G. Valkanas, A.N. Papadopoulos, Y. Manolopoulos, D. Gunopulos: "Processing Top-k Dominating Queries in Metric Spaces", ACM Transactions on Database Systems (TODS), [best paper from EDBT 2014], 40(4), pp.1-38, 2016.

G. S. Brodal, A. Kaporis, A. N. Papadopoulos, S. Sioutas, K. Tsakalidis, K. Tsichlas: "Dynamic 3-sided Planar Range Queries with Expected Doubly Logarithmic Time", Theoretical Computer Science (TCS), 526, pp.58-74, 2014.

E. Tiakas, G. Valkanas, A. N. Papadopoulos, Y. Manolopoulos, D. Gunopoulos: "Metric-Based Top-k Dominating Queries", Proceedings of the 17th International Conference on Extending Database Technology (EDBT), Athens, Greece, 2014.

A. Kosmatopoulos, K. Tsichlas, A. N. Papadopoulos: "Dynamic Processing of Dominating Queries with Performance Guarantees", Proceedings of the 17th International Conference on Database Theory (ICDT), Athens, Greece, 2014.

E. Valari, A. N. Papadopoulos: "Continuous Similarity Computation over Streaming Graphs", Proceedings of the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD), Prague, Czech Republic, 2013.

D. Georgiadis, M. Kontaki, A. Gounaris, A. N. Papadopoulos, K. Tsichlas, Y. Manolopoulos: "Continuous Outlier Detection in Data Streams: an Extensible Framework and State-of-the-Art Algorithms", Proceedings of the ACM SIGMOD International Conference on Management of Data, [demo track], New York, NY, USA, 2013.

G. Valkanas, A. N. Papadopoulos, D. Gunopoulos: "SkyDiver: A Framework for Skyline Diversification", Proceedings of the 16th International Conference on Extending Database Technology (EDBT), Genoa, Italy, 2013.

M. Kontaki, A. N. Papadopoulos, Y. Manolopoulos: "Continuous Top-k Dominating Queries", IEEE Transactions on Knowledge and Data Engineering (TKDE), 24(5), pp.840-853, 2012.

E. Tiakas, A. N. Papadopoulos, Y. Manolopoulos: "Progressive Processing of Subspace Dominating Queries", The VLDB Journal, 20(6), pp.921-948, 2011.

M. Kontaki, A. Gounaris, A. N. Papadopoulos, K. Tsichlas, Y. Manolopoulos: "Continuous Monitoring of Distance-Based Outliers over Data Streams", Proceedings of the 27th IEEE International Conference on Data Engineering (ICDE), pp.135-146, Hannover, Germany, 2011.

PhD Supervising

Ongoing

Graduated