| Day 1 (July 3rd, 2025) | |
| Time | Event |
| 8:30 - 10:00am | Session 1: "Graphs & Knowledge Management" |
| 8:30 - 8:48am | Path-based summary explanations for graph
recommenders
Danae Pla Karidi (Archimedes, Athena RC)*; Evaggelia Pitoura (University of Ioannina and Archimedes, Athena Research Center) |
| 8:48 - 9:06am | Progressive Querying on Knowledge Graphs
Haridimos Kondylakis (FORTH-ICS & Computer Science Department, University of Crete)* |
| 9:06 - 9:24am | The GraphTempo Framework for Exploring the Evolution
of
a Graph through Pattern Aggregation
Evangelia Tsoukanara (University of Macedonia); Georgia Koloniari (University of Macedonia)*; Evaggelia Pitoura (University of Ioannina); Peter Triantafillou (University of Warwick) |
| 9:24 - 9:42am | Time-Related Patterns Of Schema Evolution
Panos Vassiliadis (University of Ioannina )*; Alexandros Karakasidis (University of Macedonia) |
| 9:42 - 10:00am | Extreme Error-bounded Compression of Scientific Data
via Temporal Graph Autoencoders
Muhannad Alhumaidi (KAUST)*; Spiros Skiadopoulos (UOP); guozhong Li (KAUST); Panos Kalnis (KAUST) |
| 10:00 - 10:30am | Coffee Break |
| 10:30 - 12:00pm | Session 2: "Systems" |
| 10:30 - 10:48am | Efficient Placement of Decomposable Aggregation
Functions for Stream Processing over Large Geo-Distributed
Topologies
Xenofon Chatziliadis (Technische Universität Berlin)*; Eleni Tzirita Zacharatou (Hasso Plattner Institute); Alphan Eracar (Technische Universität Berlin); Steffen Zeuch (Technische Universität Berlin); Volker Markl (Technische Universität Berlin) |
| 10:48 - 11:06am | Employing Streaming Machine Learning for Modeling
Workload Patterns in Multi-Tiered Data Storage Systems
Edson Ramiro Lucas Filho (Cyprus University of Technology); George Savva (Cyprus University of Technology); Lun Yang (Huawei Technologies Co., Ltd.); Kebo Fu (Huawei Technologies Co., Ltd.); Jianqiang Shen (Huawei Technologies Co., Ltd.); Herodotos Herodotou (Cyprus University of Technology)* |
| 11:06 - 11:24am | Fast and Scalable Data Transfer Across Data
Systems
Haralampos Gavriilidis (Technische Universität Berlin)* |
| 11:24 - 11:42am | Dandelion: Smaller Clusters, Bigger
Speeds—Distributed
Transactions Redefined
Antonios Katsarakis (Huawei Research)*; Vasilis Gavrielatos (Huawei Research); Chris Jensen (University of Cambridge); Nikos Ntarmos (Huawei Research, Edinburgh) |
| 11:42 - 12:00pm | Fast, Highly Available, and Recoverable Transactions
on Disaggregated Data Stores
Mahesh Dananjaya (Huawei Research, Edinburgh); Vasilis Gavrielatos (Huawei Research, Edinburgh); Antonios Katsarakis (Huawei Research)*; Nikos Ntarmos (Huawei Research, Edinburgh); Vijay Nagarajan (University of Utah) |
| 12:00pm - 1:00pm | Keynote: Mosaics in Big Data
Prof. Dr. Volker Markl (TU Berlin, Germany) |
| 1:00 - 2:00pm | Lunch Break |
| 2:00 - 3:30pm | Session 3: "Spatial, Time-series & Scientific" |
| 2:00 - 2:18pm | Chameleon: Adaptive and Scalable Stream Processing
Over Sensor Sources
Dimitrios Giouroukis (BIFOLD, TU Berlin)*; Varun Pandey (BIFOLD, TU Berlin); Steffen Zeuch (BIFOLD, TU Berlin); Volker Markl (BIFOLD, TU Berlin) |
| 2:18 - 2:36pm | Updating an Adaptive Spatial Index
Fatemeh Zardbani (Aarhus University); Konstantinos Lampropoulos (University of Ioannina); Nikos Mamoulis (University of Ioannina); Panagiotis Karras (University of Copenhagen)* |
| 2:36 - 2:54pm | Flexible grouping of linear segments for highly
accurate lossy compression of time series data
Xenophon Kitsios (Athens University of Economics and Business)*; Panagiotis Liakos (Athens University of Economics and Business); Katia Papakonstantinopoulou (Athens University of Economics and Business); Yannis Kotidis (Athens University of Economics and Business) |
| 2:54 - 3:12pm | Efficient Distance Queries on Non-point Data
Achilleas Michalopoulos (University of Ioannina); Dimitrios Tsitsigkos (Archimedes, Athena RC); Panagiotis Bouros ( Johannes Gutenberg Universitat Mainz); Nikos Mamoulis (University of Ioannina)*; Manolis Terrovitis (IMSI, Athena RC) |
| 3:12 - 3:30pm | Parallel Spatial Join Processing with Adaptive
Replication
Nikolaos Koutroumanis (Archimedes, Athena RC)*; Christos Doulkeridis (University of Piraeus); Akrivi Vlachou (Department of Information and Communication Systems Engineering) |
| 3:30 - 4:00pm | Coffee break |
| 4:00 - 4:48pm | Session 4a: "Lightning Talks Demo, Research Poster & Student Poster" |
| 4:00 - 4:03pm | SPARTAN: Data-Adaptive Symbolic Time-Series
Approximation
Fan Yang (The Ohio State University); John Paparrizos (The Ohio State University)* |
| 4:03 - 4:06pm | A Structured Study of Multivariate Time-Series
Distance Measures
Jens d'Hondt (TU Eindhoven); Haojun Li (The Ohio State University); Fan Yang (The Ohio State University); Odysseas Papapetrou (TU Eindhoven); John Paparrizos (The Ohio State University)* |
| 4:06 - 4:09pm | TREATS: Fairness-aware Entity Resolution over
Streaming Data
Tiago Brasileiro Araujo (Tampere University); Vasilis Efthymiou (Harokopio University of Athens); Vassilis Christophides (ENSEA, ETIS); Evaggelia Pitoura (University of Ioannina); Kostas Stefanidis (Tampere University)* |
| 4:09 - 4:12pm | DataDazzle: Intelligent Data Exploration through
Natural Language
Mike Xydas (Athena Research Center)*; Anna Mitsopoulou (Archimedes, Athena Research Center ); George Katsogiannis-Meimarakis (Athena Research Center ); Chris Tsapelas (Athena Research Center ); Stavroula Eleftherakis (Athena Research Center); Αntonis Μandamadiotis (Athena Research Center ); Georgia Koutrika (Athena Research Center) |
| 4:12 - 4:15pm | Discovering Comprehensive Branched Declarative
Process Constraints
Christos Balaktsis (Aristotle University of Thessaloniki)*; Ioannis Mavroudopoulos (Aristotle University of Thessaloniki); Marco Comuzzi (Ulsan National Institute of Science and Technology); Anastasios Gounaris (Aristotle University of Thessaloniki); Fabrizio Maggi (Free University of Bozen-Bolzano) |
| 4:15 - 4:18pm | LLM-MS: Querying Open-Source LLMs through a
Multi-Model Search Engine
Konstantin Krasovitskiy (University of Cyprus); Stelios Christou (University of Cyprus); Demetris Zeinalipour (University of Cyprus)* |
| 4:18 - 4:21pm | UDFBench: A Tool for Benchmarking UDF Queries on SQL
Engines
Yannis Foufoulas (Athena Research Center)*; Theoni Palaiologou (University of Athens); Alkis Simitsis (Athena Research Center) |
| 4:21 - 4:24pm | A Theoretical Framework for Distribution-Aware
Dataset Search
Aryan Esmailpour (University of Illinois Chicago); Sainyam Galhotra (Cornell University); Rahul Raychaudhury (Duke University); Stavros Sintos (University of Illinois Chicago)* |
| 4:24 - 4:27pm | Transforming Maritime Safety: Data-driven
Applications for the Real-Time Detection and Mitigation of Maritime
Incidents
Georgios Grigoropoulos (Kpler)*; Alexandros Troupiotis - Kapeliaris (Kpler); Ilias Chamatidis (Kpler); Evangelia Filippou (Kpler); Konstantina Bereta (Kpler) |
| 4:27 - 4:30pm | Storage fabric for autonomous collaborative edge
devices
Pantelis Ypsilantis (Aristotle University Of Thessaloniki); Theodoros Toliopoulos (Aristotle University of Thessaloniki)*; Anastasios Gounaris (Aristotle University Of Thessaloniki) |
| 4:30 - 4:33pm | Accelerated Migration of Enterprise Data Warehouses
Using Database Virtualization
Nikos Tsikoudis (Datometry)* |
| 4:33 - 4:36pm | PROVATO: A Data-Centric Edge-AI Architecture for
Precision Livestock Monitoring Using IoT
Andreas Doumouras (University of the Peloponnese); Evangelos Mitikas (University of West Attica); Ermis Doulos (University of the Peloponnese); Manos Schoinoplokakis (University of the Peloponnese); Giannis Nikolentzos (University of the Peloponnese); Christos Tryfonopoulos (University of the Peloponnese)*; Spiros Skiadopoulos (University of the Peloponnese); Costas Vassilakis (University of the Peloponnese); Paraskevi Raftopoulou (University of the Peloponnese) |
| 4:36 - 4:39pm | LIMECEP: Lazy Inconsistency-aware MultiPattern
Edge-ready CEP
Styliani Kyrama (Aristotle University of Thessaloniki)*; Anastasios Gounaris (Aristotle University of Thessaloniki) |
| 4:39 - 4:42pm | Towards Efficient Perturbation-based Explanations in
RAG
George Balanos (University of Ioannina)* |
| 4:42 - 4:45pm | Hecatoncheir: Scaling up and out spatial data
management
Thanasis Georgiadis (University of Ioannina)*; Achilleas Michalopoulos (University of Ioannina); Dimitris Tsitsigkos (Archimedes, AthenaRC); Nikos Mamoulis (University of Ioannina) |
| 4:45 - 4:48pm | KG2Documents: Enhancing Explainability in Medical QA
via Knowledge Graph-Aided Retrieval-Augmented Generation
EVANGELOS CHASANIS (Archimedes Unit, Athena Research Center)* |
| 4:48 - 6:00pm | Session 4b: "Demo, Research Poster & Student Poster Presentations" |
| 8:30-10:30pm | Social Dinner |
| Day 2 (July 4th, 2025) | |
| Time | Event |
| 8:30 - 10:00am | Session 5: "Query Processing and Language Interfaces" |
| 8:30 - 8:48am | LLM-MS: A Multi-Model LLM Search Engine
Konstantin Krasovitskiy (University of Cyprus); Stelios Christou (University of Cyprus); Demetris Zeinalipour (University of Cyprus)* |
| 8:48 - 9:06am | OBLIVIATOR: OBLIVIous Parallel Joins and other
OperATORs in Shared Memory Environments
Apostolos Mavrogiannakis (UCSC)*; Xian Wang (HKUST); Ioannis Demertzis (UCSC); Dimitrios Papadopoulos (HKUST); Minos Garofalakis (ATHENA Research Center) |
| 9:06 - 9:24am | Bag Containment of Join-On-Free Queries
George Konstantinidis (University of Southampton)* |
| 9:24 - 9:42am | HAIDES: Adaptive Approximation of Inference Queries
over Unstructured Data
Christos Papadopoulos (Aalborg University)*; Alkis Simitsis (ATHENA Research Center); Torben Bach Pedersen (Aalborg University) |
| 9:42 - 10:00am | Analysis of Text-to-SQL Benchmarks: Limitations,
Challenges and Opportunities
Anna Mitsopoulou (Archimedes, Athena Research and Innovation Center)*; Georgia Koutrika (Athena Research Center) |
| 10:00 - 10:30am | Coffee Break |
| 10:30 - 12:00pm | Session 6: "Data Quality" |
| 10:30 - 10:48am | Deduplicated Sampling On-Demand
Luca Zecchini (BIFOLD & TU Berlin); Vasilis Efthymiou (Harokopio University of Athens)*; Felix Naumann (Hasso Plattner Institute); Giovanni Simonini (University of Modena & Reggio Emilia) |
| 10:48 - 11:06am | FedeM: Federated Learning-Based Privacy-Preserving
Record Matching
Michail Zervas (University of Macedonia ); Alexandros Karakasidis (University of Macedonia)* |
| 11:06 - 11:24am | Metadata Unification in Open Data with
Gnomon
Christina Christodoulakis (University of Toronto)*; Moshe Gabel (University of Toronto); Angela Demke Brown (University of Toronto) |
| 11:24 - 11:42am | Data Glitches Discovery using Influence-based Model
Explanations
Nikolaos Myrtakis (University of Crete)*; Ioannis Tsamardinos (University of Crete); Vassilis Christophides (ENSEA) |
| 11:42 - 12:00pm | QueryER: A Framework for Fast Analysis-Aware
Deduplication over Dirty Data
Giorgos Alexiou (Athena Research Center)*; George Papastefanatos (Athena Research Center); Vassilis Stamatopoulos (Athena Research Center ); Georgia Koutrika (Athena Research Center ); Nectarios Koziris (National Technical University Athens) |
| 12:00pm - 1:00pm | Keynote: Data Management Strategies for Space-Efficient Decoding and Planning
Prof. Panagiotis Karras (University of Copenhagen, Denmark) |
| 1:00 - 2:00pm | Lunch Break |
| 2:00 - 3:30pm | Session 7: "Data Mining" |
| 2:00 - 2:18pm | State-transition-aware anomaly detection under
concept drifts
Emmanuel Müller (TU Dortmund)* |
| 2:18 - 2:36pm | Unsupervised Features Ranking via Coalitional Game
Theory for Categorical Data
Emmanuel Müller (TU Dortmund)* |
| 2:36 - 2:54pm | STracker: A framework for identifying sentiment
changes in customer feedbacks
Petri Puustinen (Tampere University); Maria Stratigi (Tampere University); Kostas Stefanidis (Tampere University)* |
| 2:54 - 3:12pm | Improved Approximation Algorithms for Relational
Clustering
Aryan Esmailpour (University of Illinois Chicago); Stavros Sintos (University of Illinois Chicago)* |
| 3:30 - 4:00pm | Coffee Break |
| 4:00 - 4:45pm | Session 8a: "Sponsored Talks" |
| 4:00 - 4:15pm | Sponsored Talk: I Asked AI To Optimize My Database
Giannis Panselinas (Natech) |
| 4:15 - 4:30pm | Sponsored Talk: IT Disaster Recovery Program at COSMOTE TELEKOM
Fragkiskos Pentaris (Cosmote Telekom) |
| 4:30 - 4:45pm | Sponsored Talk: Kpler Research Labs
Georgios Grigoropoulos (Kpler) |
| 4:45 - 6:00pm | Session 8b: "HDMS Closing" |