Publications
Conferences/Workshops
2023
Efficient Execution of User-Defined Functions in SQL Queries.
Yannis Foufoulas, Alkis Simitsis.
PVLDB, 2023 
The History, Present, and Future of ETL Technology.
Alkis Simitsis, Spiros Skiadopoulos, Panos Vassiliadis.
DOLAP, 2023
Toulouse: Learning Join Order Optimization Policies for Rule-based Data Engines.
Antonios Karvelas, Yannis Foufoulas, Alkis Simitsis, Yannis Ioannidis.
DataPlat, 2023
User-Defined Functions in Modern Data Engines.
Yannis Foufoulas, Alkis Simitsis.
IEEE ICDE 2023, 2023
2022
YeSQL: You extend SQL with Rich and Highly Performant User-Defined Functions in Relational Databases.
Yannis Foufoulas, Alkis Simitsis, Lefteris Stamatogiannakis, Yannis Ioannidis.
PVLDB, 2022
YeSQL: Rich User-Defined Functions without the Overhead.
Yannis Foufoulas, Alkis Simitsis, Yannis Ioannidis.
PVLDB, 2022
SheerMP: Optimized Streaming Analytics-as-a-Service over Multi-site and Multi-platform Settings.
George Stamatakis, Antonis Kontaxakis, Alkis Simitsis, Nikos Giatrakos, Antonios Deligiannakis.
EDBT, 2022
2021
Extreme-Scale Interactive Cross-Platform Streaming Analytics - The INFORE Approach.
Antonios Deligiannakis, Nikos Giatrakos, Yannis Kotidis, Vasilis Samoladas, Alkis Simitsis.
SEA-Data@VLDB, 2021
2020
INforE: Interactive Cross-platform Analytics for Everyone.
Nikos Giatrakos, David Arnu, Theodoros Bitsakis, Antonios Deligiannakis, Minos N. Garofalakis, Ralf Klinkenberg, Aris Konidaris, Antonis Kontaxakis, Yannis Kotidis, Vasilis Samoladas, Alkis Simitsis, George Stamatakis, Fabian Temme, et al..
ACM CIKM, 2020
2019
RawVis: Visual Exploration over Raw Data.
Nikos Bikakis, Stavros Maroulis, George Papastefanatos, Panos Vassiliadis.
17th Hellenic Data Management Symposium (HDMS’19), 2019
Journals
2023
Data-Driven Soiling Detection in PV Modules.
Alexandros Kalimeris, Ioannis Psarros, Giorgos Giannopoulos, Manolis Terrovitis, George Papastefanatos, Gregory Kotsis.
IEEE Journal of Photovoltaics (Volume: 13, Issue: 3, May 2023) , 2023
2019
Big Data Exploration, Visualization and Analytics.
Nikos Bikakis, George Papastefanatos, Olga Papaemmanouil.
Journal on Big Data Research, Vol. 18 (2019). Editorial in Special Issue, 2019
Technical Reports
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PhD Theses
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Diploma Theses
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Books
2020
Cyber security and its impact on Connected Autonomous Vehicles safety: State-of-the-art, policy needs and challenges.
Christos Katrakazas, Athanasios Theofilatos, George Papastefanatos, Jerome Härri, Costas Antoniou.
Book Chapter in Volume “Policy Implications of Autonomous Vehicles”, Elsevier, Advances in Transport Policy and Planning, Volume 5, Pages 73-94, 2020