Selected publications

2012-2016
  • Isak Karlsson, Panagiotis Papapetrou, and Henrik Bostrom, "Random Shapelet Forests". In the Data Mining and Knowledge Discovery Journal (DAMI), To Appear [pdf]
  • Andreas Henelius, Isak Karlson, Panagiotis Papapetrou, Antti Ukkonnen, Kai Puolamaki, "Semigeometric Tiling of Event Sequences ". In Proceedings of the European Conference of Machine Learning and Principles and Practices of Knowledge Discovery in Databases (ECML PKDD), To Appear [pdf]
  • Isak Karlsson, Panagiotis Papapetrou, and Henrik Bostrom, "Early-classification of Time Series". In Proceedings of the International Conference on Discovery Science (DS), Best Paper Award, To Appear [pdf]
  • Leon Bornemann, Jason Lercef, and Panagiotis Papapetrou, "STIFE: A Framework for Feature-based Classification of Sequences of Temporal Intervals". In Proceedings of the International Conference on Discovery Science (DS), To Appear [pdf]
  • Alexios Kotsifakos, Isak Karlsson, Panagiotis Papapetrou, Vassilis Athitsos, and Dimitrios Gunopulos, "Embedding-based Subsequence Matching with Gaps-Range-Tolerances: a Query-By-Humming application". In the Very Large Databases (VLDB) Journal (VLDBJ), 24(4): 519-536, 2015 [pdf]
  • Orestis Kostakis and Panagiotis Papapetrou, "Finding the Longest Common Sub-Pattern in Sequences of Temporal Intervals". In the Data Mining and Knowledge Discovery Journal (DAMI), 29(5): 1178-1210, 2015 [pdf]
  • Alexios Kotsifakos, Alexandra Stefan, Vassilis Athitsos, Gautam Das, and Panagiotis Papapetrou, "DRESS: Dimensionality Reduction for Efficient Sequence Search". In the Data Mining and Knowledge Discovery Journal (DAMI), 29(5): 1280-1311, 2015 [pdf]
  • Pat Jangyodsuk, Panagiotis Papapetrou, and Vassilis Athitsos, "Optimizing Hashing Functions for Similarity Indexing in Arbitrary Metric and Nonmetric Spaces". SIAM International Conference on Data Mining (SDM), 828-836, 2015 [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, and Kai Puolamaki, "Size Matters: Choosing the Most Informative Set of Window Lengths for Mining Patterns in Event Sequences". In the Data Mining and Knowledge Discovery Journal (DAMI), 29(6): 1838-1864, 2015 [pdf]
  • Andreas Henelius, Kai Puolamaki, Henrik Bostrom, Lars Asker, and Panagiotis Papapetrou, "A Peek into the Black Box: Exploring Classifiers by Randomization". In the Data Mining and Knowledge Discovery Journal (DAMI), 28(5-6): 1503-1529, 2014 [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, and Kai Puolamaki, "A Statistical Significance Testing Approach to Mining the Most Informative Set of Patterns". In the Data Mining and Knowledge Discovery Journal (DAMI), 28(1), 2014 [pdf]
  • Alexios Kotsifakos, Panagiotis Papapetrou, and Vassilis Athitsos, "IBSM: Interval-Based Sequence Matching". In Proceedings of the SIAM Conference on Data Mining (SDM), 2013 [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, and Kai Puolamaki, "Size Matters: Finding the Most Informative Set of Window Lengths". In Proceedings of the European Conference of Machine Learning and Principles and Practices of Knowledge Discovery in Databases (ECML PKDD), pages 451-466, 2012 [pdf]

All publications

Peer-reviewed

2016
  • Isak Karlsson, Panagiotis Papapetrou, and Henrik Bostrom, "Random Shapelet Forests". In the Data Mining and Knowledge Discovery Journal (DAMI), To Appear [pdf]
  • Andreas Henelius, Isak Karlson, Panagiotis Papapetrou, Antti Ukkonnen, Kai Puolamaki, "Semigeometric Tiling of Event Sequences ". In Proceedings of the European Conference of Machine Learning and Principles and Practices of Knowledge Discovery in Databases (ECML PKDD), To Appear [pdf]
  • Isak Karlsson, Panagiotis Papapetrou, and Henrik Bostrom, "Early-classification of Time Series". In Proceedings of the International Conference on Discovery Science (DS), To Appear [pdf]
  • Leon Bornemann, Jason Lercef, and Panagiotis Papapetrou, "STIFE: A Framework for Feature-based Classification of Sequences of Temporal Intervals". In Proceedings of the International Conference on Discovery Science (DS), Best Paper Award, To Appear [pdf]
  • Mohammad Jaber, Peter Wood, Panagiotis Papapetrou, and Ana Gonzalez Marcos, "A Multi-granularity Pattern-based Sequence Classification Framework for Educational Data". In Proceedings of the IEEE International Conference on Data Science and Advanced Analytics (DSAA), To Appear [pdf]
  • Alexios Kotsifakos, Panagiotis Papapetrou, and Vassilis Athitsos, "Query-sensitive Distance Measure Selection for Time Series Nearest Neighbor Classification". Intelligent Data Analysis Journal (IDAJ), 20(1): 5-27, 2016 [pdf]
  • Jefrey Lijffijt, Terttu Nevalainen, Tanja Saily, Panagiotis Papapetrou, Kai Puolamaki, and Heikki Mannila, "Significance Testing of Word Frequencies in Corpora". Digital Scholarship in the Humanities (DSH), 31(2), 2016 [pdf]
2015
  • Alexios Kotsifakos, Isak Karlsson, Panagiotis Papapetrou, Vassilis Athitsos, and Dimitrios Gunopulos, "Embedding-based Subsequence Matching with Gaps-Range-Tolerances: a Query-By-Humming application". In the Very Large Databases (VLDB) Journal (VLDBJ), 24(4): 519-536, 2015 [pdf]
  • Orestis Kostakis and Panagiotis Papapetrou, "Finding the Longest Common Sub-Pattern in Sequences of Temporal Intervals". In the Data Mining and Knowledge Discovery Journal (DAMI), 29(5): 1178-1210, 2015 [pdf]
  • Alexios Kotsifakos, Alexandra Stefan, Vassilis Athitsos, Gautam Das, and Panagiotis Papapetrou, "DRESS: Dimensionality Reduction for Efficient Sequence Search". In the Data Mining and Knowledge Discovery Journal (DAMI), 29(5): 1280-1311, 2015 [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, and Kai Puolamaki, "Size Matters: Choosing the Most Informative Set of Window Lengths for Mining Patterns in Event Sequences". In the Data Mining and Knowledge Discovery Journal (DAMI), 29(6): 1838-1864, 2015 [pdf]
  • Pat Jangyodsuk, Panagiotis Papapetrou, and Vassilis Athitsos, "Optimizing Hashing Functions for Similarity Indexing in Arbitrary Metric and Nonmetric Spaces". SIAM International Conference on Data Mining (SDM), 828-836, 2015 [pdf]
  • Isak Karlsson, Panagiotis Papapetrou, and Henrik Bostrom, "Forests of Randomized Shapelet Trees". International Symposium on Learning and Data Sciences (SLDS), To Appear [pdf]
  • Andreas Henelius, Kai Puolamki, Isak Karlsson, Jing Zhao, Lars Asker, Henrik Bostrom, and Panagiotis Papapetrou, "GoldenEye++: a Closer Look into the Black Box". International Symposium on Learning and Data Sciences (SLDS), To Appear [pdf]
  • Mohammad Jaber, Panagiotis Papapetrou, Ana González-Marcos, Peter T. Wood, "Analysing Online Education-based Asynchronous Communication Tools to Detect Students' Roles ". CSEDU (2): 416-424, 2015 [pdf]
2014
  • Andreas Henelius, Kai Puolamaki, Henrik Bostrom, Lars Asker, and Panagiotis Papapetrou, "A Peek into the Black Box: Exploring Classifiers by Randomization". In the Data Mining and Knowledge Discovery Journal (DAMI), Volume 28, Issue 5-6, pp 1503-1529, 2014.[pdf]
  • Mohammad Jaber, Panagiotis Papapetrou, Sven Helmer, and Peter Wood, "Using Time-Sensitive Rooted PageRank to Detect Hierarchical Social Relationships". In Proceedings of the International Symposium on Intelligent Data Analysis (IDA), 2014 [pdf]
  • Alexios Kotsifakos and Panagiotis Papapetrou, "Model-based Time Series Classification". In Proceedings of the International Symposium on Intelligent Data Analysis (IDA), 2014 [pdf]
  • Panagiotis Papapetrou and George Roussos, "Social Context Discovery from Temporal App Use Patterns". In the ACM Conference on Ubiquitous Computing Adjunct Publication Proceedings (UbiComp Adjunct), 2014 [pdf]
  • Mohammad Jaber, Peter Wood, Panagiotis Papapetrou, and Sven Helmer, "Inferring Offline Hierarchical Ties from Online Social Networks". In Proceedings of the WWW Workshop on Connecting Online & Offline Life (WWW/COOL), To Appear [pdf]
  • Nikolaos Tselas and Panagiotis Papapetrou, "Classifying Electocardiograms using time warping methods". In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), To Appear [pdf]
  • Lars Asker, Henrik Boström, Isak Karlsson, Panagiotis Papapetrou, and Jing Zhao, "Mining Candidates for Adverse Drug Interactions in Electronic Patient Records". In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), To Appear [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, and Kai Puolamaki, "A statistical significance testing approach to mining the most informative set of patterns". In the Data Mining and Knowledge Discovery Journal (DAMI), Volume 28, No. 1, 2014 [pdf]
2013
  • Thidawan Klaysri, Trevor Fenner, Oded Lachish, Mark Levene, and Panagiotis Papapetrou, "Analysis of Cluster Structure on Large-scale English Wikipedia Category Networks". In Proceedings of the International Symposium on Intelligent Data Analysis (IDA) (IDA), 2013 [pdf]
  • Alexios Kotsifakos, Panagiotis Papapetrou, and Vassilis Athitsos, "IBSM: Interval-Based Sequence Matching". In Proceedings of the SIAM Conference on Data Mining (SDM), 2013 [pdf]
  • Alexios Kotsifakos, Evangelos Kotsifakos, Panagiotis Papapetrou, and Vassilis Athitsos, "Genre Classification of Symbolic Music with SMBGT", In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), 2013 [pdf]
2012
2011
  • Panagiotis Papapetrou, Luiz Augusto Pizzato, Aristides Gionis, Xiongcai Cai, "Proceedings of the IEEE ICDM Workshop on Community Mining and People Recommenders", December 2011
  • Panagiotis Papapetrou, Vassilis Athitsos, Michalis Potamias, George Kollios, and Dimitrios Gunopulos, "Embedding-based Subsequence Matching in Time Series Databases". In ACM Transactions on Database Systems (TODS), Volume 36, No. 3, Article 17, August 2011 [pdf]
  • Alexios Kotsifakos, Panagiotis Papapetrou, Jaakko Hollmen, and Dimitrios Gunopulos, "A Subsequence Matching with Gaps-Range-Tolerances Framework: A Query-By-Humming Application". In Proceedings of the Very Large DataBases Endowement (PVLDB), Volume 4, Issue 11, pages 761-771, 2011 [pdf]
  • Panagiotis Papapetrou, Aristides Gionis, and Heikki Mannila, "A Shapley-value Approach for Influence Attribution". In Proceedings of the European Conference of Machine Learning and Principles and Practices of Knowledge Discovery in Databases (ECML PKDD), pages 549-564, September 2011 [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, Kai Puolamaki, and Heikki Mannila, "Analyzing Word Frequencies in Large Text Corpora using Inter-arrival Times and Bootstrapping". In Proceedings of the European Conference of Machine Learning and Principles and Practices of Knowledge Discovery in Databases (ECML PKDD), pages 341-357, September 2011 [pdf]
  • Orestis Kostakis, Panagiotis Papapetrou, and Jaakko Hollmen, "Artemis: Assessing the Similarity of Event-Interval Sequences". In Proceedings of the European Conference of Machine Learning and Principles and Practices of Knowledge Discovery in Databases (ECML PKDD), pages 229-244, September 2011 [pdf]
  • Alexios Kotsifakos, Vassilis Athitsos, Panagiotis Papapetrou, Jaakko Hollmen, and Dimitrios Gunopulos, "Model-based search in large time series databases". In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), May 2011
  • Orestis Kostakis, Panagiotis Papapetrou, and Jaakko Hollmen, "Distance Measure for Querying Arrangements of Temporal Intervals". In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), May 2011 [pdf]
2010
  • Kai Puolamaki, Panagiotis Papapetrou, and Jefrey Lijffijt, "Visually-Controllable Data Mining Methods". In Proceedings of the IEEE International Conference on Data Mining Workshop, (ICDM VAKD) December 2010, Sydney, Australia [pdf]
  • Kai Puolamaki, Alessio Bertone, Roberto Theron, Otto Huisman, Jimmy Johansson, Silvia Miksch, Panagiotis Papapetrou, and Salvo Rinzivillo, "Mastering the Information Age Solving Problems with Visual Analytics, chapter Data Mining", pages 39-56. Eurographics Association, 2010
  • Jefrey Lijffijt, Panagiotis Papapetrou, Jaakko Hollmen, and Vassilis Athitsos, "Benchmarking dynamic time warping for music retrieval". In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), June 2010, Samos, Greece [pdf]
  • Jefrey Lijffijt, Panagiotis Papapetrou, and Jaakko Hollmen, "Tracking your steps on the track: Body sensor recordings of a controlled walking experiment". In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), June 2010, Samos, Greece [pdf]
2009
  • Panagiotis Papapetrou, George Kollios, Stan Sclaroff, and Dimitrios Gunopulos, "Mining Frequent Arrangements of Temporal Intervals". In Knowledge and Information Systems (KAIS), Volume 21, Issue 2 (2009), Pages 133-171 [pdf]
  • Panagiotis Papapetrou, Vassilis Athitsos, George Kollios, and Dimitrios Gunopulos, "Reference-Based Alignment in Large Sequence Databases", In Proceedings of the Very Large DataBases Endowment (PVLDB), Volume 2, Issue 1 (2009), Pages 205-216 [pdf][Oral presentation in VLDB 2009: ppt]
  • Panagiotis Papapetrou, Paul Doliotis and Vassilis Athitsos, "Towards Faster Activity Search Using Embedding-based Subsequence Matching", In Proceedings of Pervasive Technologies Related to Assistive Environments (PETRA), June 2009, Corfu, Greece [pdf]
2008
2006
  • Panagiotis Papapetrou, Gary Benson, and George Kollios, "Discovering Frequent Poly-Regions in DNA Sequences". In Proceedings of the IEEE International Conference on Data Mining Workshop on Data Mining in Bioinformatics (ICDM DMB), December 2006, Hong Kong [pdf] [Full Version: pdf ][talk slides in ppt]
2005
  • Panagiotis Papapetrou, George Kollios, Stan Sclaroff, and Dimitrios Gunopulos, "Discovering Frequent Arrangements of Temporal Intervals". In Proceedings of the IEEE International Conference on Data Mining (ICDM), November 2005, Houston, Texas, USA [pdf] [talk slides in ppt]

Technical Reports

2010
  • Jefrey Lijffijt, Panagiotis Papapetrou, Niko Vuokko, and Kai Puolamaki. "The smallest set of constraints that explains the data: a randomization approach". TKK-ICS-R31, TKK Reports in Information and Computer Science, Espoo, 2010
2008
  • Panagiotis Papapetrou, Gary Benson, and George Kollios, "Generalized Methods for Discovering Frequent Poly-Regions in DNA Sequences".Technical Report, Department of Computer Science, Boston University, October 21, 2008
2006
  • Ching Chang, Raymond Sweha, Panagiotis Papapetrou, "Extending snBench to Support a Graphical Programming Interface for a Sensor Network Tasking Language (STEP)". Technical Report, Department of Computer Science, Boston University, July 14, 2006. [pdf] [Web-site]

Theses

2010
  • "Embedding-based Subsequence Matching in Large Sequence Databases", Ph.D. Thesis [pdf][defense slides in ppt]
2007
  • "Constraint-based Mining of Frequent Arrangements of Temporal Intervals", M.A. Thesis [pdf] [defense slides in ppt]
2004
  • "Discovering Aggregate Usage Profiles using Clustering Methods", B.Sc. Thesis [zip] (in Greek only)
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