@conference {858,
	title = {PROVATO: A Data-Centric Edge-AI Architecture forPrecision Livestock Monitoring Using IoT},
	booktitle = {Hellenic Data Management Symposium (HDMS)},
	year = {2025},
	abstract = {<p>This work presents PROVATO (PRecisiOn liVestock monitoring with AI and IoT tOols), an edge AI and IoTpowered platform for real-time livestock monitoring. The system enables farmers to track animal health and behaviour, ensuring scalable data processing and AI inference at both the edge and the cloud. This approach supports decision-making, reduces resource waste, and improves animal welfare.</p>
},
	keywords = {IoT, livestock monitoring, livestock wellfare},
	author = {Andreas Doumouras and Evangelos Mitikas and Ermis Doulos and Manos Schoinoplokakis and Giannis Nikolentzos and Christos Tryfonopoulos and Spiros Skiadopoulos and Costas Vassilakis and Paraskevi Raftopoulou*}
}
@conference {819,
	title = {SodaSense: An Intelligence Platform for Micro-Mobility, Micro-Climate and Agriculture},
	booktitle = {Proceedings of the GEOProcessing 2023},
	year = {2023},
	abstract = {<p>SODASENSE is an end-to-end big data manipulation platform that focuses on decision and policy making. It concerns the management of big trajectory and spatio-temporal data that is collected from sensors and relates to micro-mobility, microclimate and agriculture, and aims to the creation of an expert decision making platform with research, social and business orientation.</p>
},
	keywords = {big data management and analysis, spatial time series, trajectories},
	author = {Paraskevi Raftopoulou and Spiros Skiadopoulos and Christos Tryfonopoulos and Costas Vassilakis}
}
@conference {DBLP:conf/debs/ChantziosZST19,
	title = {Ping - A customizable, open-source information filtering system for textual data},
	booktitle = {Proceedings of the 13th ACM International Conference on Distributed and Event-based Systems, DEBS 2019, Darmstadt, Germany, June 24-28, 2019.},
	year = {2019},
	pages = {228{\textendash}231},
	doi = {10.1145/3328905.3332512},
	url = {https://doi.org/10.1145/3328905.3332512},
	author = {Thanasis Chantzios and Lefteris Zervakis and Spiros Skiadopoulos and Christos Tryfonopoulos}
}
@conference {588,
	title = {The quest for the appropriate cyber-threat intelligence sharing platform},
	booktitle = {Proceedings of the 8th International Conference on Data Science, Technology and Applications (DATA), Prague, Czech Republic},
	year = {2019},
	month = { 07/2009},
	abstract = {Cyber-threat intelligence (CTI) is any information that can help an organization identify, assess, monitor, and respond to cyber-threats. It relates to all cyber components of an organization such as networks, computers, and other types of information technology. In the recent years, due to the major increase of cyber-threats, CTI sharing is becoming increasingly important both as a subject of research and as a concept of providing additional security to organizations. However, selecting the proper tools and platforms for CTI sharing, is a challenging task, that pertains to a variety of aspects. In this paper, we start by overviewing the CTI procedure (threat types, categories, sources and the general CTI life-cycle). Then, we present a set of seven high-level CTI platform recommendations that can be used to evaluate a platform and subsequently we survey six state-of- the-art cyber-threat intelligence platforms. Finally, we compare and evaluate the six aforementioned platforms by means of the earlier proposed recommendations.},
	keywords = {Cyber-threat, Intelligence, Sharing},
	url = {http://users.uop.gr/~trifon/papers/pdf/data19-CKSKTBK.pdf},
	author = {Thanasis Chantzios and Paris Koloveas and Spiros Skiadopoulos and Nikos Kolokotronis and Christos Tryfonopoulos and Vasiliki-Georgia Bilali and Dimitris Kavallieros}
}
@article {DBLP:journals/bdr/Chatzigeorgakidis19,
	title = {Visual Exploration of Geolocated Time Series with Hybrid Indexing},
	journal = {Big Data Research},
	volume = {15},
	year = {2019},
	pages = {12{\textendash}28},
	doi = {10.1016/j.bdr.2019.02.001},
	url = {https://doi.org/10.1016/j.bdr.2019.02.001},
	author = {Georgios Chatzigeorgakidis and Kostas Patroumpas and Dimitrios Skoutas and Spiros Athanasiou and Spiros Skiadopoulos}
}
@inbook {DBLP:reference/db/Skiadopoulos18,
	title = {Cardinal Direction Relationships},
	booktitle = {Encyclopedia of Database Systems, Second Edition},
	year = {2018},
	doi = {10.1007/978-1-4614-8265-9_45},
	url = {https://doi.org/10.1007/978-1-4614-8265-9_45},
	author = {Spiros Skiadopoulos}
}
@conference {DBLP:conf/ssdbm/KaffesBSS18,
	title = {Finding shortest keyword covering routes in road networks},
	booktitle = {Proceedings of the 30th International Conference on Scientific and Statistical Database Management, SSDBM 2018, Bozen-Bolzano, Italy, July 09-11, 2018},
	year = {2018},
	pages = {12:1{\textendash}12:12},
	doi = {10.1145/3221269.3223038},
	url = {https://doi.org/10.1145/3221269.3223038},
	author = {Vassilis Kaffes and Alexandros Belesiotis and Dimitrios Skoutas and Spiros Skiadopoulos}
}
@article {DBLP:journals/jbd/Chatzigeorgakidis18,
	title = {FML-kNN: scalable machine learning on Big Data using \emphk-nearest neighbor joins},
	journal = {J. Big Data},
	volume = {5},
	year = {2018},
	pages = {4},
	doi = {10.1186/s40537-018-0115-x},
	url = {https://doi.org/10.1186/s40537-018-0115-x},
	author = {Georgios Chatzigeorgakidis and Sophia Karagiorgou and Spiros Athanasiou and Spiros Skiadopoulos}
}
@article {DBLP:journals/dke/AllamSK18,
	title = {Improved suffix blocking for record linkage and entity resolution},
	journal = {Data Knowl. Eng.},
	volume = {117},
	year = {2018},
	pages = {98{\textendash}113},
	doi = {10.1016/j.datak.2018.07.005},
	url = {https://doi.org/10.1016/j.datak.2018.07.005},
	author = {Amin Allam and Spiros Skiadopoulos and Panos Kalnis}
}
@conference {DBLP:conf/edbt/Chatzigeorgakidis18,
	title = {Map-Based Visual Exploration of Geolocated Time Series},
	booktitle = {Proceedings of the Workshops of the EDBT/ICDT 2018 Joint Conference (EDBT/ICDT 2018), Vienna, Austria, March 26, 2018.},
	year = {2018},
	pages = {92{\textendash}99},
	url = {http://ceur-ws.org/Vol-2083/paper-14.pdf},
	author = {Georgios Chatzigeorgakidis and Dimitrios Skoutas and Kostas Patroumpas and Spiros Athanasiou and Spiros Skiadopoulos}
}
@article {DBLP:journals/tpds/JamourSK18,
	title = {Parallel Algorithm for Incremental Betweenness Centrality on Large Graphs},
	journal = {IEEE Trans. Parallel Distrib. Syst.},
	volume = {29},
	number = {3},
	year = {2018},
	pages = {659{\textendash}672},
	doi = {10.1109/TPDS.2017.2763951},
	url = {https://doi.org/10.1109/TPDS.2017.2763951},
	author = {Fuad Jamour and Spiros Skiadopoulos and Panos Kalnis}
}
@conference {DBLP:conf/gis/Chatzigeorgakidis18,
	title = {Scalable hybrid similarity join over geolocated time series},
	booktitle = {Proceedings of the 26th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, SIGSPATIAL 2018, Seattle, WA, USA, November 06-09, 2018},
	year = {2018},
	pages = {119{\textendash}128},
	doi = {10.1145/3274895.3274949},
	url = {https://doi.org/10.1145/3274895.3274949},
	author = {Georgios Chatzigeorgakidis and Kostas Patroumpas and Dimitrios Skoutas and Spiros Athanasiou and Spiros Skiadopoulos}
}
@conference {DBLP:conf/pakdd/ChronisGAS18,
	title = {Unsupervised Disaggregation of Low Granularity Resource Consumption Time Series},
	booktitle = {Advances in Knowledge Discovery and Data Mining - 22nd Pacific-Asia Conference, PAKDD 2018, Melbourne, VIC, Australia, June 3-6, 2018, Proceedings, Part II},
	year = {2018},
	pages = {558{\textendash}570},
	doi = {10.1007/978-3-319-93037-4_44},
	url = {https://doi.org/10.1007/978-3-319-93037-4_44},
	author = {Pantelis Chronis and Giorgos Giannopoulos and Spiros Athanasiou and Spiros Skiadopoulos}
}
@article {DBLP:journals/jbi/PoulisLSG17,
	title = {Anonymizing datasets with demographics and diagnosis codes in the presence of utility constraints},
	journal = {Journal of Biomedical Informatics},
	volume = {65},
	year = {2017},
	pages = {76{\textendash}96},
	doi = {10.1016/j.jbi.2016.11.001},
	url = {https://doi.org/10.1016/j.jbi.2016.11.001},
	author = {Giorgos Poulis and Grigorios Loukides and Spiros Skiadopoulos and Aris Gkoulalas-Divanis}
}
@conference {DBLP:conf/ssdbm/AlGhamdiJSK17,
	title = {A Benchmark for Betweenness Centrality Approximation Algorithms on Large Graphs},
	booktitle = {Proceedings of the 29th International Conference on Scientific and Statistical Database Management, Chicago, IL, USA, June 27-29, 2017},
	year = {2017},
	pages = {6:1{\textendash}6:12},
	doi = {10.1145/3085504.3085510},
	url = {https://doi.org/10.1145/3085504.3085510},
	author = {Ziyad AlGhamdi and Fuad Jamour and Spiros Skiadopoulos and Panos Kalnis}
}
@article {DBLP:journals/bmcbi/ZagganasVPVSD17,
	title = {BUFET: boosting the unbiased miRNA functional enrichment analysis using bitsets},
	journal = {BMC Bioinformatics},
	volume = {18},
	number = {1},
	year = {2017},
	pages = {399:1{\textendash}399:8},
	doi = {10.1186/s12859-017-1812-8},
	url = {https://doi.org/10.1186/s12859-017-1812-8},
	author = {Konstantinos Zagganas and Thanasis Vergoulis and Maria D. Paraskevopoulou and Ioannis S. Vlachos and Spiros Skiadopoulos and Theodore Dalamagas}
}
@inbook {DBLP:reference/gis/Skiadopoulos17,
	title = {Directional Relations},
	booktitle = {Encyclopedia of GIS.},
	year = {2017},
	pages = {476{\textendash}482},
	doi = {10.1007/978-3-319-17885-1_1539},
	url = {https://doi.org/10.1007/978-3-319-17885-1_1539},
	author = {Spiros Skiadopoulos}
}
@conference {DBLP:conf/gis/Chatzigeorgakidis17,
	title = {Indexing Geolocated Time Series Data},
	booktitle = {Proceedings of the 25th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, GIS 2017, Redondo Beach, CA, USA, November 7-10, 2017},
	year = {2017},
	pages = {19:1{\textendash}19:10},
	doi = {10.1145/3139958.3140003},
	url = {https://doi.org/10.1145/3139958.3140003},
	author = {Georgios Chatzigeorgakidis and Dimitrios Skoutas and Kostas Patroumpas and Spiros Athanasiou and Spiros Skiadopoulos}
}
@article {DBLP:journals/tkde/TerrovitisPMS17,
	title = {Local Suppression and Splitting Techniques for Privacy Preserving Publication of Trajectories},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {29},
	number = {7},
	year = {2017},
	pages = {1466{\textendash}1479},
	doi = {10.1109/TKDE.2017.2675420},
	url = {https://doi.org/10.1109/TKDE.2017.2675420},
	author = {Manolis Terrovitis and Giorgos Poulis and Nikos Mamoulis and Spiros Skiadopoulos}
}
@article {581,
	title = {Query Reorganisation Algorithms for Efficient Boolean Information Filtering},
	journal = {IEEE Transactions on Knowledge and Data Engineering},
	volume = {29},
	year = {2017},
	pages = {418{\textendash}432},
	abstract = {In the information filtering paradigm, clients subscribe to a server with continuous queries that express their information needs and get notified every time appropriate information is published. To perform this task in an efficient way, servers employ indexing schemes that support fast matches of the incoming information with the query database. Such indexing schemes involve (i) main-memory trie-based data structures that cluster similar queries by capturing common elements between them and (ii) efficient filtering mechanisms that exploit this clustering to achieve high throughput and low filtering times. However, state-of-the-art indexing schemes are sensitive to the query insertion order and cannot adopt to an evolving query workload, degrading the filtering performance over time. In this paper, we present an adaptive trie-based algorithm that outperforms current methods by relying on query statistics to reorganise the query database. Contrary to previous approaches, we show that the nature of the constructed tries, rather than their compactness, is the determining factor for efficient filtering performance. Our algorithm does not depend on the order of insertion of queries in the database, manages to cluster queries even when clustering possibilities are limited, and achieves more than 96\% filtering time improvement over its state-of-the-art competitors. Finally, we demonstrate that our solution is easily extensible to multi-core machines.},
	keywords = {dissemination, indexing methods, Information filtering, user profiles and alert services},
	doi = {10.1109/TKDE.2016.2620140},
	url = {https://doi.org/10.1109/TKDE.2016.2620140},
	author = {Lefteris Zervakis and Christos Tryfonopoulos and Spiros Skiadopoulos and Manolis Koubarakis}
}
@conference {591,
	title = {A crawler architecture for harvesting the clear, social, and dark web for IoT-related cyber-threat intelligence},
	booktitle = {In Proceedings of the IEEE Workshop on Cyber Security \& Resilience in the Internet of Things (CSRIoT @ IEEE Services)},
	year = {2016},
	month = {July 2016},
	publisher = {IEEE},
	organization = {IEEE},
	address = {Milan, Italy},
	abstract = {The clear, social, and dark web have lately been identified as rich sources of valuable cyber-security information that {\textendash}given the appropriate tools and methods{\textendash} may be identified, crawled and subsequently leveraged to actionable cyber- threat intelligence. In this work, we focus on the information gathering task, and present a novel crawling architecture for transparently harvesting data from security websites in the clear web, security forums in the social web, and hacker fo- rums/marketplaces in the dark web. The proposed architecture adopts a two-phase approach to data harvesting. Initially a machine learning-based crawler is used to direct the harvesting towards websites of interest, while in the second phase state- of-the-art statistical language modelling techniques are used to represent the harvested information in a latent low-dimensional feature space and rank it based on its potential relevance to the task at hand. The proposed architecture is realised using exclusively open-source tools, and a preliminary evaluation with crowdsourced results demonstrates its effectiveness.},
	keywords = {crawling architecture, cyber-security, cyber-threat intelligence, IoT, language models, Machine Learning},
	url = {http://users.uop.gr/ trifon/papers/pdf/csriot19-KCTS.pdf},
	author = {Paris Koloveas and Thanasis Chantzios and Christos Tryfonopoulos and Spiros Skiadopoulos}
}
@conference {DBLP:conf/esws/ZervakisTSK16,
	title = {Full-Text Support for Publish/Subscribe Ontology Systems},
	booktitle = {The Semantic Web. Latest Advances and New Domains - 13th International Conference, ESWC 2016, Heraklion, Crete, Greece, May 29 - June 2, 2016, Proceedings},
	year = {2016},
	pages = {233{\textendash}249},
	doi = {10.1007/978-3-319-34129-3_15},
	url = {https://doi.org/10.1007/978-3-319-34129-3_15},
	author = {Lefteris Zervakis and Christos Tryfonopoulos and Spiros Skiadopoulos and Manolis Koubarakis}
}
@conference {DBLP:conf/edbt/ZervakisTSSS16,
	title = {Towards Publish/Subscribe Functionality on Graphs},
	booktitle = {Proceedings of the Workshops of the EDBT/ICDT 2016 Joint Conference, EDBT/ICDT Workshops 2016, Bordeaux, France, March 15, 2016.},
	year = {2016},
	url = {http://ceur-ws.org/Vol-1558/paper13.pdf},
	author = {Lefteris Zervakis and Christos Tryfonopoulos and Vinay Setty and Stephan Seufert and Spiros Skiadopoulos}
}
@conference {563,
	title = {Cloud-Based Data and Knowledge Management for Multi-Centre Biomedical Studies},
	booktitle = {Proceedings of the International Conference on Knowledge Capture (K-CAP)},
	year = {2015},
	month = {October 7-10},
	address = {Palisades NY, USA},
	abstract = {Among the basic research tools for (bio)medical science are epidemiological studies that typically involve a number of hospitals, clinics, and research centres scattered around the world, and are often referred to as multi-centre studies. Clearly, the effectiveness and importance of a multi-centre study increases with the number of participating centres and enrolled patients, but at the same time this natural distribution in the production of research data requires sophisticated data management infrastructures to support the participating units. This kind of infrastructure is not only expensive to build and maintain, but also cannot be reused as it is often tailored to a specific study. In this work, we present a cloud-based system, coined CLOUDSTUDY, that allows users without any computer science background to design, deploy, and administer platforms aimed for managing, sharing, and analysing clinical data from multi-centre studies. The CLOUDSTUDY system provides a zero-administration, zero-cost online tool for creating multi- centre studies that (i) enhances re-usability by introducing study templates, (ii) supports (bio)medical needs through specialised data types, and (iii) emphasises data filtering/export through an expressive yet simple graphical query engine.},
	doi = {10.1145/2815833.2816949},
	url = {https://doi.org/10.1145/2815833.2816949},
	author = {Amalia Tsafara and Christos Tryfonopoulos and Spiros Skiadopoulos and Lefteris Zervakis}
}
@conference {DBLP:conf/kcap/TsafaraTSZ15,
	title = {Cloud-Based Data and Knowledge Management for Multi-Centre Biomedical Studies},
	booktitle = {Proceedings of the 8th International Conference on Knowledge Capture, K-CAP 2015, Palisades, NY, USA, October 7-10, 2015},
	year = {2015},
	pages = {24:1{\textendash}24:4},
	doi = {10.1145/2815833.2816949},
	url = {https://doi.org/10.1145/2815833.2816949},
	author = {Amalia Tsafara and Christos Tryfonopoulos and Spiros Skiadopoulos and Lefteris Zervakis}
}
@conference {DBLP:conf/bigdataconf/Chatzigeorgakidis15,
	title = {A MapReduce based k-NN joins probabilistic classifier},
	booktitle = {2015 IEEE International Conference on Big Data, Big Data 2015, Santa Clara, CA, USA, October 29 - November 1, 2015},
	year = {2015},
	pages = {952{\textendash}957},
	doi = {10.1109/BigData.2015.7363844},
	url = {https://doi.org/10.1109/BigData.2015.7363844},
	author = {Georgios Chatzigeorgakidis and Sophia Karagiorgou and Spiros Athanasiou and Spiros Skiadopoulos}
}
@inbook {565,
	title = {SECRETA: A Tool for Anonymizing Relational, Transaction and RT-Datasets},
	booktitle = {Medical Data Privacy Handbook},
	year = {2015},
	pages = {83-109},
	publisher = {Springer},
	organization = {Springer},
	author = {Giorgos Poulis and Aris Gkoulalas-Divanis and Grigorios Loukides and Spiros Skiadopoulos and Christos Tryfonopoulos},
	editor = {Aris Gkoulalas-Divanis and Grigorios Loukides}
}
@inbook {DBLP:books/sp/15/PoulisGLST15,
	title = {SECRETA: A Tool for Anonymizing Relational, Transaction and RT-Datasets},
	booktitle = {Medical Data Privacy Handbook},
	year = {2015},
	pages = {83{\textendash}109},
	doi = {10.1007/978-3-319-23633-9_5},
	url = {https://doi.org/10.1007/978-3-319-23633-9_5},
	author = {Giorgos Poulis and Aris Gkoulalas-Divanis and Grigorios Loukides and Spiros Skiadopoulos and Christos Tryfonopoulos}
}
@article {DBLP:journals/tdp/PoulisSLG14,
	title = {Apriori-based algorithms for k\(^\mboxm\)-anonymizing trajectory data},
	journal = {Trans. Data Privacy},
	volume = {7},
	number = {2},
	year = {2014},
	pages = {165{\textendash}194},
	url = {http://www.tdp.cat/issues11/abs.a194a14.php},
	author = {Giorgos Poulis and Spiros Skiadopoulos and Grigorios Loukides and Aris Gkoulalas-Divanis}
}
@article {DBLP:journals/pvldb/ElseidyASK14,
	title = {GRAMI: Frequent Subgraph and Pattern Mining in a Single Large Graph},
	journal = {PVLDB},
	volume = {7},
	number = {7},
	year = {2014},
	pages = {517{\textendash}528},
	doi = {10.14778/2732286.2732289},
	url = {http://www.vldb.org/pvldb/vol7/p517-elseidy.pdf},
	author = {Mohammed Elseidy and Ehab Abdelhamid and Spiros Skiadopoulos and Panos Kalnis}
}
@conference {DBLP:conf/edbt/PoulisGLST14,
	title = {SECRETA: A System for Evaluating and Comparing RElational and Transaction Anonymization algorithms},
	booktitle = {Proceedings of the 17th International Conference on Extending Database Technology, EDBT 2014, Athens, Greece},
	year = {2014},
	month = {March 24-28},
	pages = {620{\textendash}623},
	doi = {10.5441/002/edbt.2014.58},
	url = {https://doi.org/10.5441/002/edbt.2014.58},
	author = {Giorgos Poulis and Aris Gkoulalas-Divanis and Grigorios Loukides and Spiros Skiadopoulos and Christos Tryfonopoulos}
}
@conference {DBLP:conf/pkdd/PoulisLGS13,
	title = {Anonymizing Data with Relational and Transaction Attributes},
	booktitle = {Machine Learning and Knowledge Discovery in Databases - European Conference, ECML PKDD 2013, Prague, Czech Republic, September 23-27, 2013, Proceedings, Part III},
	year = {2013},
	pages = {353{\textendash}369},
	doi = {10.1007/978-3-642-40994-3_23},
	url = {https://doi.org/10.1007/978-3-642-40994-3_23},
	author = {Giorgos Poulis and Grigorios Loukides and Aris Gkoulalas-Divanis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/bibe/TsafaraTS13,
	title = {CloudStudy: A cloud-based system for supporting multi-centre studies},
	booktitle = {13th IEEE International Conference on BioInformatics and BioEngineering, BIBE 2013, Chania, Greece, November 10-13, 2013},
	year = {2013},
	pages = {1{\textendash}4},
	doi = {10.1109/BIBE.2013.6701549},
	url = {https://doi.org/10.1109/BIBE.2013.6701549},
	author = {Amalia Tsafara and Christos Tryfonopoulos and Spiros Skiadopoulos}
}
@conference {DBLP:conf/mdm/PoulisSLG13,
	title = {Distance-Based k\^m-Anonymization of Trajectory Data},
	booktitle = {2013 IEEE 14th International Conference on Mobile Data Management, Milan, Italy, June 3-6, 2013 - Volume 2},
	year = {2013},
	pages = {57{\textendash}62},
	doi = {10.1109/MDM.2013.66},
	url = {https://doi.org/10.1109/MDM.2013.66},
	author = {Giorgos Poulis and Spiros Skiadopoulos and Grigorios Loukides and Aris Gkoulalas-Divanis}
}
@article {DBLP:journals/corr/ZervakisTPKS13,
	title = {Full-text Support for Publish/Subscribe Ontology Systems},
	journal = {CoRR},
	volume = {abs/1307.2015},
	year = {2013},
	url = {http://arxiv.org/abs/1307.2015},
	author = {Lefteris Zervakis and Christos Tryfonopoulos and Antonios Papadakis-Pesaresi and Manolis Koubarakis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/icdm/PoulisSLG13,
	title = {Select-Organize-Anonymize: A Framework for Trajectory Data Anonymization},
	booktitle = {13th IEEE International Conference on Data Mining Workshops, ICDM Workshops, TX, USA, December 7-10, 2013},
	year = {2013},
	pages = {867{\textendash}874},
	doi = {10.1109/ICDMW.2013.136},
	url = {https://doi.org/10.1109/ICDMW.2013.136},
	author = {Giorgos Poulis and Spiros Skiadopoulos and Grigorios Loukides and Aris Gkoulalas-Divanis}
}
@article {DBLP:journals/tkde/BourosSDSS12,
	title = {Evaluating Path Queries over Frequently Updated Route Collections},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {24},
	number = {7},
	year = {2012},
	pages = {1276{\textendash}1290},
	doi = {10.1109/TKDE.2011.30},
	url = {https://doi.org/10.1109/TKDE.2011.30},
	author = {Panagiotis Bouros and Dimitris Sacharidis and Theodore Dalamagas and Spiros Skiadopoulos and Timos K. Sellis}
}
@conference {554,
	title = {Full-text Support for Publish/Subscribe Ontology Systems},
	booktitle = {Proceedings of the Extended Semantic Web Conference (ESWC)},
	year = {2012},
	month = {May},
	address = {Crete, Greece},
	author = {Lefteris Zervakis and Christos Tryfonopoulos and Antonios Papadakis-Pesaresi and Manolis Koubarakis and Spiros Skiadopoulos}
}
@article {DBLP:journals/corr/abs-1207-0135,
	title = {Privacy Preservation by Disassociation},
	journal = {CoRR},
	volume = {abs/1207.0135},
	year = {2012},
	url = {http://arxiv.org/abs/1207.0135},
	author = {Manolis Terrovitis and John Liagouris and Nikos Mamoulis and Spiros Skiadopoulos}
}
@article {DBLP:journals/pvldb/TerrovitisLMS12,
	title = {Privacy Preservation by Disassociation},
	journal = {PVLDB},
	volume = {5},
	number = {10},
	year = {2012},
	pages = {944{\textendash}955},
	doi = {10.14778/2336664.2336668},
	url = {http://vldb.org/pvldb/vol5/p944_manolisterrovitis_vldb2012.pdf},
	author = {Manolis Terrovitis and John Liagouris and Nikos Mamoulis and Spiros Skiadopoulos}
}
@article {DBLP:journals/corr/abs-1109-6884,
	title = {ERA: Efficient Serial and Parallel Suffix Tree Construction for Very Long Strings},
	journal = {CoRR},
	volume = {abs/1109.6884},
	year = {2011},
	url = {http://arxiv.org/abs/1109.6884},
	author = {Essam Mansour and Amin Allam and Spiros Skiadopoulos and Panos Kalnis}
}
@article {DBLP:journals/pvldb/MansourASK11,
	title = {ERA: Efficient Serial and Parallel Suffix Tree Construction for Very Long Strings},
	journal = {PVLDB},
	volume = {5},
	number = {1},
	year = {2011},
	pages = {49{\textendash}60},
	doi = {10.14778/2047485.2047490},
	url = {http://www.vldb.org/pvldb/vol5/p049_essammansour_vldb2012.pdf},
	author = {Essam Mansour and Amin Allam and Spiros Skiadopoulos and Panos Kalnis}
}
@article {DBLP:journals/tkde/ClementiniSBT10,
	title = {A Reasoning System of Ternary Projective Relations},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {22},
	number = {2},
	year = {2010},
	pages = {161{\textendash}178},
	doi = {10.1109/TKDE.2009.79},
	url = {https://doi.org/10.1109/TKDE.2009.79},
	author = {Eliseo Clementini and Spiros Skiadopoulos and Roland Billen and Francesco Tarquini}
}
@inbook {DBLP:reference/db/Skiadopoulos09,
	title = {Cardinal Direction Relationships},
	booktitle = {Encyclopedia of Database Systems},
	year = {2009},
	pages = {305{\textendash}308},
	doi = {10.1007/978-0-387-39940-9_45},
	url = {https://doi.org/10.1007/978-0-387-39940-9_45},
	author = {Spiros Skiadopoulos}
}
@conference {DBLP:conf/ssdbm/BourosSDSS09,
	title = {Evaluating Reachability Queries over Path Collections},
	booktitle = {Scientific and Statistical Database Management, 21st International Conference, SSDBM 2009, New Orleans, LA, USA, June 2-4, 2009, Proceedings},
	year = {2009},
	pages = {398{\textendash}416},
	doi = {10.1007/978-3-642-02279-1_29},
	url = {https://doi.org/10.1007/978-3-642-02279-1_29},
	author = {Panagiotis Bouros and Spiros Skiadopoulos and Theodore Dalamagas and Dimitris Sacharidis and Timos K. Sellis}
}
@article {DBLP:journals/tkde/KantereSS09,
	title = {Storing and Indexing Spatial Data in P2P Systems},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {21},
	number = {2},
	year = {2009},
	pages = {287{\textendash}300},
	doi = {10.1109/TKDE.2008.139},
	url = {https://doi.org/10.1109/TKDE.2008.139},
	author = {Verena Kantere and Spiros Skiadopoulos and Timos K. Sellis}
}
@article {DBLP:journals/tkde/PolyzotisSVSF08,
	title = {Meshing Streaming Updates with Persistent Data in an Active Data Warehouse},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {20},
	number = {7},
	year = {2008},
	pages = {976{\textendash}991},
	doi = {10.1109/TKDE.2008.27},
	url = {https://doi.org/10.1109/TKDE.2008.27},
	author = {Neoklis Polyzotis and Spiros Skiadopoulos and Panos Vassiliadis and Alkis Simitsis and Nils-Erik Frantzell}
}
@article {Vassilakis2008,
	title = {Mobile and context-aware e-commerce: Issues, challenges and research directions},
	journal = {Journal of Electronic Commerce in Organizations},
	volume = {6},
	number = {1},
	year = {2008},
	pages = {i-iv},
	abstract = {Electronic commerce, nowadays, is trying to extend its target audience and elevate the quality of services offered to end-users. Two important directions towards meeting these goals are the embracement of mobile users, whose number grows following the advent of communication technologies, and the inclusion of context-aware features in the delivered services to improve the efficiency of the dialogues between users and systems. The context taken into account may involve characteristics regarding the human user, the geographical location and the time of access, the devices employed to access the service, the network through which the user communicates with the system, the nature of the transaction carried out and so forth. It is clear that the development and successful operation of mobile and context-aware e-commerce introduce new challenges. In order to tackle such challenges, new methodologies, tools, architectures and platforms should be made available to assist analysts, designers, developers and operators in handling the various phases of the Mobile and Context-Aware E-Commerce Services (MCACS) lifecycle.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-56649115725\&partnerID=40\&md5=8375300b820641c0897304ece76039d9},
	author = {Costas Vassilakis and Giorgos Lepouras and Spiros Skiadopoulos}
}
@article {DBLP:journals/tkde/SkiadopoulosSSK07a,
	title = {Correction to "A Family of Directional Relation Models for Extended Objects"},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {19},
	number = {10},
	year = {2007},
	pages = {1448},
	doi = {10.1109/TKDE.2007.190653},
	url = {https://doi.org/10.1109/TKDE.2007.190653},
	author = {Spiros Skiadopoulos and Nikos Sarkas and Timos K. Sellis and Manolis Koubarakis}
}
@article {DBLP:journals/tkde/SkiadopoulosSSK07,
	title = {A Family of Directional Relation Models for Extended Objects},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {19},
	number = {8},
	year = {2007},
	pages = {1116{\textendash}1130},
	doi = {10.1109/TKDE.2007.1046},
	url = {https://doi.org/10.1109/TKDE.2007.1046},
	author = {Spiros Skiadopoulos and Nikos Sarkas and Timos K. Sellis and Manolis Koubarakis}
}
@conference {DBLP:conf/ssd/GhinitaKS07,
	title = {MobiHide: A Mobilea Peer-to-Peer System for Anonymous Location-Based Queries},
	booktitle = {Advances in Spatial and Temporal Databases, 10th International Symposium, SSTD 2007, Boston, MA, USA, July 16-18, 2007, Proceedings},
	year = {2007},
	pages = {221{\textendash}238},
	doi = {10.1007/978-3-540-73540-3_13},
	url = {https://doi.org/10.1007/978-3-540-73540-3_13},
	author = {Gabriel Ghinita and Panos Kalnis and Spiros Skiadopoulos}
}
@article {DBLP:journals/dke/TerrovitisVSBCMR07,
	title = {Modeling and language support for the management of pattern-bases},
	journal = {Data Knowl. Eng.},
	volume = {62},
	number = {2},
	year = {2007},
	pages = {368{\textendash}397},
	doi = {10.1016/j.datak.2006.10.002},
	url = {https://doi.org/10.1016/j.datak.2006.10.002},
	author = {Manolis Terrovitis and Panos Vassiliadis and Spiros Skiadopoulos and Elisa Bertino and Barbara Catania and Anna Maddalena and Stefano Rizzi}
}
@conference {DBLP:conf/www/GhinitaKS07,
	title = {PRIVE: anonymous location-based queries in distributed mobile systems},
	booktitle = {Proceedings of the 16th International Conference on World Wide Web, WWW 2007, Banff, Alberta, Canada, May 8-12, 2007},
	year = {2007},
	pages = {371{\textendash}380},
	doi = {10.1145/1242572.1242623},
	url = {https://doi.org/10.1145/1242572.1242623},
	author = {Gabriel Ghinita and Panos Kalnis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/icde/PolyzotisSVSF07,
	title = {Supporting Streaming Updates in an Active Data Warehouse},
	booktitle = {Proceedings of the 23rd International Conference on Data Engineering, ICDE 2007, The Marmara Hotel, Istanbul, Turkey, April 15-20, 2007},
	year = {2007},
	pages = {476{\textendash}485},
	doi = {10.1109/ICDE.2007.367893},
	url = {https://doi.org/10.1109/ICDE.2007.367893},
	author = {Neoklis Polyzotis and Spiros Skiadopoulos and Panos Vassiliadis and Alkis Simitsis and Nils-Erik Frantzell}
}
@article {DBLP:journals/tkde/KoubarakisST06,
	title = {Logic and Computational Complexity for Boolean Information Retrieval},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {18},
	number = {12},
	year = {2006},
	pages = {1659{\textendash}1666},
	doi = {10.1109/TKDE.2006.193},
	url = {https://doi.org/10.1109/TKDE.2006.193},
	author = {Manolis Koubarakis and Spiros Skiadopoulos and Christos Tryfonopoulos}
}
@conference {DBLP:conf/er/VassiliadisSTS05,
	title = {Blueprints and Measures for ETL Workflows},
	booktitle = {Conceptual Modeling - ER 2005, 24th International Conference on Conceptual Modeling, Klagenfurt, Austria, October 24-28, 2005, Proceedings},
	year = {2005},
	pages = {385{\textendash}400},
	doi = {10.1007/11568322_25},
	url = {https://doi.org/10.1007/11568322_25},
	author = {Panos Vassiliadis and Alkis Simitsis and Manolis Terrovitis and Spiros Skiadopoulos}
}
@article {DBLP:journals/tkde/SkiadopoulosGSVSK05,
	title = {Computing and Managing Cardinal Direction Relations},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {17},
	number = {12},
	year = {2005},
	pages = {1610{\textendash}1623},
	doi = {10.1109/TKDE.2005.192},
	url = {https://doi.org/10.1109/TKDE.2005.192},
	author = {Spiros Skiadopoulos and Christos Giannoukos and Nikos Sarkas and Panos Vassiliadis and Timos K. Sellis and Manolis Koubarakis}
}
@article {DBLP:journals/ai/SkiadopoulosK05,
	title = {On the consistency of cardinal direction constraints},
	journal = {Artif. Intell.},
	volume = {163},
	number = {1},
	year = {2005},
	pages = {91{\textendash}135},
	doi = {10.1016/j.artint.2004.10.010},
	url = {https://doi.org/10.1016/j.artint.2004.10.010},
	author = {Spiros Skiadopoulos and Manolis Koubarakis}
}
@article {DBLP:journals/is/VassiliadisSGTS05,
	title = {A generic and customizable framework for the design of ETL scenarios},
	journal = {Inf. Syst.},
	volume = {30},
	number = {7},
	year = {2005},
	pages = {492{\textendash}525},
	doi = {10.1016/j.is.2004.11.002},
	url = {https://doi.org/10.1016/j.is.2004.11.002},
	author = {Panos Vassiliadis and Alkis Simitsis and Panos Georgantas and Manolis Terrovitis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/dawak/SimitsisVTS05,
	title = {Graph-Based Modeling of ETL Activities with Multi-level Transformations and Updates},
	booktitle = {Data Warehousing and Knowledge Discovery, 7th International Conference, DaWaK 2005, Copenhagen, Denmark, August 22-26, 2005, Proceedings},
	year = {2005},
	pages = {43{\textendash}52},
	doi = {10.1007/11546849_5},
	url = {https://doi.org/10.1007/11546849_5},
	author = {Alkis Simitsis and Panos Vassiliadis and Manolis Terrovitis and Spiros Skiadopoulos}
}
@article {DBLP:journals/jdwm/ManiatisVSVMM05,
	title = {A Presentation Model \& Non-Traditional Visualization for OLAP},
	journal = {IJDWM},
	volume = {1},
	number = {1},
	year = {2005},
	pages = {1{\textendash}36},
	doi = {10.4018/jdwm.2005010101},
	url = {https://doi.org/10.4018/jdwm.2005010101},
	author = {Andreas S. Maniatis and Panos Vassiliadis and Spiros Skiadopoulos and Yannis Vassiliou and George Mavrogonatos and Ilias Michalarias}
}
@article {DBLP:journals/ai/SkiadopoulosK04,
	title = {Composing cardinal direction relations},
	journal = {Artif. Intell.},
	volume = {152},
	number = {2},
	year = {2004},
	pages = {143{\textendash}171},
	doi = {10.1016/S0004-3702(03)00137-1},
	url = {https://doi.org/10.1016/S0004-3702(03)00137-1},
	author = {Spiros Skiadopoulos and Manolis Koubarakis}
}
@conference {DBLP:conf/edbt/SkiadopoulosGVSK04,
	title = {Computing and Handling Cardinal Direction Information},
	booktitle = {Advances in Database Technology - EDBT 2004, 9th International Conference on Extending Database Technology, Heraklion, Crete, Greece, March 14-18, 2004, Proceedings},
	year = {2004},
	pages = {329{\textendash}347},
	doi = {10.1007/978-3-540-24741-8_20},
	url = {https://doi.org/10.1007/978-3-540-24741-8_20},
	author = {Spiros Skiadopoulos and Christos Giannoukos and Panos Vassiliadis and Timos K. Sellis and Manolis Koubarakis}
}
@conference {DBLP:conf/ssdbm/TerrovitisVSBCM04,
	title = {Modeling and Language Support for the Management of Pattern-Bases},
	booktitle = {Proceedings of the 16th International Conference on Scientific and Statistical Database Management (SSDBM 2004), 21-23 June 2004, Santorini Island, Greece},
	year = {2004},
	pages = {265{\textendash}274},
	doi = {10.1109/SSDBM.2004.54},
	url = {http://doi.ieeecomputersociety.org/10.1109/SSDBM.2004.54},
	author = {Manolis Terrovitis and Panos Vassiliadis and Spiros Skiadopoulos and Elisa Bertino and Barbara Catania and Anna Maddalena}
}
@conference {DBLP:conf/dolap/ManiatisVSV03,
	title = {Advanced visualization for OLAP},
	booktitle = {DOLAP 2003, ACM Sixth International Workshop on Data Warehousing and OLAP, New Orleans, Louisiana, USA, November 7, 2003, Proceedings},
	year = {2003},
	pages = {9{\textendash}16},
	doi = {10.1145/956060.956063},
	url = {https://doi.org/10.1145/956060.956063},
	author = {Andreas S. Maniatis and Panos Vassiliadis and Spiros Skiadopoulos and Yannis Vassiliou}
}
@conference {DBLP:conf/dawak/ManiatisVSV03,
	title = {CPM: A Cube Presentation Model for OLAP},
	booktitle = {Data Warehousing and Knowledge Discovery, 5th International Conference, DaWaK 2003, Prague, Czech Republic, September 3-5,2003, Proceedings},
	year = {2003},
	pages = {4{\textendash}13},
	doi = {10.1007/978-3-540-45228-7_2},
	url = {https://doi.org/10.1007/978-3-540-45228-7_2},
	author = {Andreas S. Maniatis and Panos Vassiliadis and Spiros Skiadopoulos and Yannis Vassiliou}
}
@conference {DBLP:conf/chorochronos/GrumbachKRSS03,
	title = {Spatio-temporal Models and Languages: An Approach Based on Constraints},
	booktitle = {Spatio-Temporal Databases: The CHOROCHRONOS Approach},
	year = {2003},
	pages = {177{\textendash}201},
	doi = {10.1007/978-3-540-45081-8_5},
	url = {https://doi.org/10.1007/978-3-540-45081-8_5},
	author = {St{\'e}phane Grumbach and Manolis Koubarakis and Philippe Rigaux and Michel Scholl and Spiros Skiadopoulos}
}
@conference {DBLP:conf/dolap/VassiliadisSS02,
	title = {Conceptual modeling for ETL processes},
	booktitle = {DOLAP 2002, ACM Fifth International Workshop on Data Warehousing and OLAP, November 8, 2002, McLean, VA, USA, Proceedings},
	year = {2002},
	pages = {14{\textendash}21},
	doi = {10.1145/583890.583893},
	url = {https://doi.org/10.1145/583890.583893},
	author = {Panos Vassiliadis and Alkis Simitsis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/cp/SkiadopoulosK02,
	title = {Consistency Checking for Qualitative Spatial Reasoning with Cardinal Directions},
	booktitle = {Principles and Practice of Constraint Programming - CP 2002, 8th International Conference, CP 2002, Ithaca, NY, USA, September 9-13, 2002, Proceedings},
	year = {2002},
	pages = {341{\textendash}355},
	doi = {10.1007/3-540-46135-3_23},
	url = {https://doi.org/10.1007/3-540-46135-3_23},
	author = {Spiros Skiadopoulos and Manolis Koubarakis}
}
@conference {DBLP:conf/caise/VassiliadisSS02,
	title = {On the Logical Modeling of ETL Processes},
	booktitle = {Advanced Information Systems Engineering, 14th International Conference, CAiSE 2002, Toronto, Canada, May 27-31, 2002, Proceedings},
	year = {2002},
	pages = {782{\textendash}786},
	doi = {10.1007/3-540-47961-9_67},
	url = {https://doi.org/10.1007/3-540-47961-9_67},
	author = {Panos Vassiliadis and Alkis Simitsis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/dmdw/VassiliadisSS02,
	title = {Modeling ETL activities as graphs},
	booktitle = {Design and Management of Data Warehouses 2002, Proceedings of the 4th Intl. Workshop DMDW{\textquoteright}2002, Toronto, Canada, May 27, 2002},
	year = {2002},
	pages = {52{\textendash}61},
	url = {http://ceur-ws.org/Vol-58/simitsis.pdf},
	author = {Panos Vassiliadis and Alkis Simitsis and Spiros Skiadopoulos}
}
@article {DBLP:journals/is/VassiliadisVSKS01,
	title = {ARKTOS: towards the modeling, design, control and execution of ETL processes},
	journal = {Inf. Syst.},
	volume = {26},
	number = {8},
	year = {2001},
	pages = {537{\textendash}561},
	doi = {10.1016/S0306-4379(01)00039-4},
	url = {https://doi.org/10.1016/S0306-4379(01)00039-4},
	author = {Panos Vassiliadis and Zografoula Vagena and Spiros Skiadopoulos and Nikos Karayannidis and Timos K. Sellis}
}
@conference {DBLP:conf/ssd/SkiadopoulosK01,
	title = {Composing Cardinal Direction Relations},
	booktitle = {Advances in Spatial and Temporal Databases, 7th International Symposium, SSTD 2001, Redondo Beach, CA, USA, July 12-15, 2001, Proceedings},
	year = {2001},
	pages = {299{\textendash}320},
	doi = {10.1007/3-540-47724-1_16},
	url = {https://doi.org/10.1007/3-540-47724-1_16},
	author = {Spiros Skiadopoulos and Manolis Koubarakis}
}
@article {DBLP:journals/debu/VassiliadisVSK00,
	title = {ARKTOS: A Tool For Data Cleaning and Transformation in Data Warehouse Environments},
	journal = {IEEE Data Eng. Bull.},
	volume = {23},
	number = {4},
	year = {2000},
	pages = {42{\textendash}47},
	url = {http://sites.computer.org/debull/A00DEC-CD.pdf},
	author = {Panos Vassiliadis and Zografoula Vagena and Spiros Skiadopoulos and Nikos Karayannidis}
}
@conference {DBLP:conf/caise/VassiliadisS00,
	title = {Modelling and Optimisation Issues for Multidimensional Databases},
	booktitle = {Advanced Information Systems Engineering, 12th International Conference CAiSE 2000, Stockholm, Sweden, June 5-9, 2000, Proceedings},
	year = {2000},
	pages = {482{\textendash}497},
	doi = {10.1007/3-540-45140-4_32},
	url = {https://doi.org/10.1007/3-540-45140-4_32},
	author = {Panos Vassiliadis and Spiros Skiadopoulos}
}
@article {DBLP:journals/ai/KoubarakisS00,
	title = {Querying temporal and spatial constraint networks in PTIME},
	journal = {Artif. Intell.},
	volume = {123},
	number = {1-2},
	year = {2000},
	pages = {223{\textendash}263},
	doi = {10.1016/S0004-3702(00)00055-2},
	url = {https://doi.org/10.1016/S0004-3702(00)00055-2},
	author = {Manolis Koubarakis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/aaai/KoubarakisS99,
	title = {Querying Temporal Constraint Networks in PTIME},
	booktitle = {Proceedings of the Sixteenth National Conference on Artificial Intelligence and Eleventh Conference on Innovative Applications of Artificial Intelligence, July 18-22, 1999, Orlando, Florida, USA.},
	year = {1999},
	pages = {745{\textendash}750},
	url = {http://www.aaai.org/Library/AAAI/1999/aaai99-106.php},
	author = {Manolis Koubarakis and Spiros Skiadopoulos}
}
@conference {DBLP:conf/stdbm/KoubarakisS99,
	title = {Tractable Query Answering in Indefinite Constraint Databases: Basic Results and Applications to Querying Spatiotemporal Information},
	booktitle = {Spatio-Temporal Database Management, International Workshop STDBM{\textquoteright}99, Edinburgh, Scotland, September 10-11, 1999, Proceedings},
	year = {1999},
	pages = {204{\textendash}223},
	doi = {10.1007/3-540-48344-6_12},
	url = {https://doi.org/10.1007/3-540-48344-6_12},
	author = {Manolis Koubarakis and Spiros Skiadopoulos}
}
