Analytical Results on the Quadtree Storage-Requirements. - Michael Vassilakopoulos; Yannis Manolopoulos (CAIP, 1993)

Overlapping quadtrees for the representation of similar images. - Michael Vassilakopoulos; Yannis Manolopoulos; K. Economou (Image Vis. Comput., 1993)

Analytical Comparison of Two Spatial Data Structures. - Michael Vassilakopoulos; Yannis Manolopoulos (Inf. Syst., 1994)

On the Generation of Aggregated Random Spatial Regions. - Yannis Manolopoulos; Enrico Nardelli; Guido Proietti; Michael Vassilakopoulos (CIKM, 1995)

Dynamic Inverted Quadtree: A Structure for Pictorial Databases. - Michael Vassilakopoulos; Yannis Manolopoulos (Inf. Syst., 1995)

Efficiency Analysis of Overlapped Quadtrees. - Michael Vassilakopoulos; Yannis Manolopoulos; Brigitte Kröll (Nord. J. Comput., 1995)

A random model for analyzing region quadtrees. - Michael Vassilakopoulos; Yannis Manolopoulos (Pattern Recognit. Lett., 1995)

On the creation of quadtrees by using a branching process. - Yannis Manolopoulos; Enrico Nardelli; Guido Proietti; Michael Vassilakopoulos (Image Vis. Comput., 1996)

On Sampling Regional Data. - Michael Vassilakopoulos; Yannis Manolopoulos (Data Knowl. Eng., 1997)

Overlapping Linear Quadtrees: A Spatio-Temporal Access Method. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (ACM-GIS, 1998)

Processing of Spatio-Temporal Queries in Image Databases. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (ADBIS, 1999)

Esquemas de Indexación Espacio-Temporales para Datos Microclimáticos. - Antonio Corral; Michael Vassilakopoulos (JISBD, 1999)

Algorithms for Joining R-Trees and Linear Region Quadtrees. - Antonio Corral; Michael Vassilakopoulos; Yannis Manolopoulos (SSD, 1999)

Multiversion Linear Quadtree for Spatio-Temporal Data. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (ADBIS-DASFAA, 2000)

Closest Pair Queries in Spatial Databases. - Antonio Corral; Yannis Manolopoulos; Yannis Theodoridis; Michael Vassilakopoulos (SIGMOD Conference, 2000)

Overlapping Linear Quadtrees and Spatio-Temporal Query Processing. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (Comput. J., 2000)

Performance Evaluation of Parallel S-Trees. - Eleni Tousidou; Michael Vassilakopoulos; Yannis Manolopoulos (J. Database Manag., 2000)

The Impact of Buffering on Closest Pairs Queries Using R-Trees. - Antonio Corral; Michael Vassilakopoulos; Yannis Manolopoulos (ADBIS, 2001)

Time split linear quadtree for indexing image databases. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (ICIP (2), 2001)

Processing Distance-Based Queries in Multidimensional Data Spaces Using R-trees. - Antonio Corral; Joaquín Cañadas; Michael Vassilakopoulos (Panhellenic Conference on Informatics, 2001)

Approximate Algorithms for Distance-Based Queries in High-Dimensional Data Spaces Using R-Trees. - Antonio Corral; Joaquín Cañadas; Michael Vassilakopoulos (ADBIS, 2002)

Integrating Mobile Agent Infrastructures in Operational ERP Systems. - Apostolos Vontas; Philippos Koutsakas; Christina Athanasopoulou; Adamantios Koumpis; Panos Hatzaras; Yannis Manolopoulos; Michael Vassilakopoulos (ICEIS, 2002)

On the Generation of Time-Evolving Regional Data. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (GeoInformatica, 2002)

Distance Join Queries of Multiple Inputs in Spatial Databases. - Antonio Corral; Yannis Manolopoulos; Yannis Theodoridis; Michael Vassilakopoulos (ADBIS, 2003)

Access Methods and Query Processing Techniques. - Adriano Di Pasquale; Luca Forlizzi; Christian S. Jensen; Yannis Manolopoulos; Enrico Nardelli; Dieter Pfoser; Guido Proietti; Simonas Saltenis; Yannis Theodoridis; Theodoros Tzouramanis; Michael Vassilakopoulos (Spatio-Temporal Databases: The CHOROCHRONOS Approach, 2003)

Generating Dynamic Raster Data. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (IEEE Data Eng. Bull., 2003)

Performance Evaluation of Lazy Deletion Methods in R-trees. - Alexandros Nanopoulos; Michael Vassilakopoulos; Yannis Manolopoulos (GeoInformatica, 2003)

Towards Quadtree-Based Moving Objects Databases. - Katerina Raptopoulou; Michael Vassilakopoulos; Yannis Manolopoulos (ADBIS, 2004)

Algorithms for processing K-closest-pair queries in spatial databases. - Antonio Corral; Yannis Manolopoulos; Yannis Theodoridis; Michael Vassilakopoulos (Data Knowl. Eng., 2004)

Benchmarking access methods for time-evolving regional data. - Theodoros Tzouramanis; Michael Vassilakopoulos; Yannis Manolopoulos (Data Knowl. Eng., 2004)

Multi-Way Distance Join Queries in Spatial Databases. - Antonio Corral; Yannis Manolopoulos; Yannis Theodoridis; Michael Vassilakopoulos (GeoInformatica, 2004)

Query Processing in Spatial Databases. - Antonio Corral; Michael Vassilakopoulos (Encyclopedia of Database Technologies and Applications, 2005)

Spatio-Temporal Indexing Techniques. - Michael Vassilakopoulos; Antonio Corral (Encyclopedia of Database Technologies and Applications, 2005)

Approximate Computation of Distance-Based Queries. - Antonio Corral; Michael Vassilakopoulos (Spatial Databases, 2005)

VA-Files vs. R*-Trees in Distance Join Queries. - Antonio Corral; Alejandro D'Ermiliis; Yannis Manolopoulos; Michael Vassilakopoulos (ADBIS, 2005)

On Approximate Algorithms for Distance-Based Queries using R-trees. - Antonio Corral; Michael Vassilakopoulos (Comput. J., 2005)

A spatio-temporal geometry-based model for digital documentation of historical living systems. - Athanasios D. Styliadis; Michael Vassilakopoulos (Inf. Manag., 2005)

Efficient processing of past-future spatiotemporal queries. - Katerina Raptopoulou; Michael Vassilakopoulos; Yannis Manolopoulos (SAC, 2006)

Cost models for distance joins queries using R-trees. - Antonio Corral; Yannis Manolopoulos; Yannis Theodoridis; Michael Vassilakopoulos (Data Knowl. Eng., 2006)

On past-time indexing of moving objects. - Katerina Raptopoulou; Michael Vassilakopoulos; Yannis Manolopoulos (J. Syst. Softw., 2006)

Predictive Join Processing between Regions and Moving Objects. - Antonio Corral; Manuel Torres 001; Michael Vassilakopoulos; Yannis Manolopoulos (ADBIS, 2008)

Conceptual Universal Database Language: Moving Up the Database Design Levels. - Nikitas N. Karanikolas; Michael Vassilakopoulos (ADBIS, 2009)

Closest-Pair Query. - Antonio Corral; Michael Vassilakopoulos (Encyclopedia of Database Systems, 2009)

Quadtrees (and Family). - Michael Vassilakopoulos; Theodoros Tzouramanis (Encyclopedia of Database Systems, 2009)

Ant Colony Optimization and Data Mining: Techniques and Trends. - Ioannis Michelakos; Nikolaos Mallios; Elpiniki I. Papageorgiou; Michael Vassilakopoulos (3PGCIC, 2010)

A Hybrid Classification Algorithm Evaluated on Medical Data. - Ioannis Michelakos; Elpiniki I. Papageorgiou; Michael Vassilakopoulos (WETICE, 2010)

A Study of cAnt-Miner2 Parameters Using Medical Data Sets. - Ioannis Michelakos; Elpiniki I. Papageorgiou; Michael Vassilakopoulos (WETICE, 2010)

Performance Comparison of xBR-trees and R*-trees for Single Dataset Spatial Queries. - George Roumelis; Michael Vassilakopoulos; Antonio Corral (ADBIS, 2011)

Assessment of language skills weaknesses and their confrontation through personalized e-lessons. - Nikitas N. Karanikolas; Michael Vassilakopoulos (CompSysTech, 2011)

Nearest Neighbor Algorithms Using xBR-Trees. - George Roumelis; Michael Vassilakopoulos; Antonio Corral (Panhellenic Conference on Informatics, 2011)

Join-Queries between Two Spatial Datasets Indexed by a Single R*-Tree. - Michael Vassilakopoulos; Antonio Corral; Nikitas N. Karanikolas (SOFSEM, 2011)

Ant Colony Optimization and Data Mining. - Ioannis Michelakos; Nikolaos Mallios; Elpiniki I. Papageorgiou; Michael Vassilakopoulos (Next Generation Data Technologies for Collective Computational Intelligence, 2011)

A software tool for building a statistical prefix processor. - Nikitas Karanikolas; Michael Vassilakopoulos; Nektarios Giannoulis (BCI, 2012)

The Deletion Operation in xBR-Trees. - George Roumelis; Michael Vassilakopoulos; Antonio Corral (Panhellenic Conference on Informatics, 2012)

Database Design of a Geo-environmental Information System . - George Roumelis; Thanasis Loukopoulos; Michael Vassilakopoulos (ICEIS (2), 2014)

A New Plane-Sweep Algorithm for the K-Closest-Pairs Query. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (SOFSEM, 2014)

Comparison of Post-Relational and Object-Relational modelling for real-world database applications. - Nikitas N. Karanikolas; Michael Vassilakopoulos (J. Syst. Inf. Technol., 2014)

The xBR ^+ -tree: An Efficient Access Method for Points. - George Roumelis; Michael Vassilakopoulos; Thanasis Loukopoulos; Antonio Corral; Yannis Manolopoulos (DEXA (1), 2015)

Plane-Sweep Algorithms for the K Group Nearest-Neighbor Query. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (GISTAM, 2015)

The K Group Nearest-Neighbor Query on Non-indexed RAM-Resident Data. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (GISTAM (Selected Papers), 2015)

A diet-guide mobile application for diabetes mellitus management. - Nikolaos Ch. Kasmeridis; Michael Vassilakopoulos (Panhellenic Conference on Informatics, 2015)

RAC: a remote application calling framework for coordination of mobile apps. - Panos Papadopoulos; Thanasis Loukopoulos; Ioannis Anagnostopoulos; Nikolaos Tziritas; Michael Vassilakopoulos (Panhellenic Conference on Informatics, 2015)

Enhancing SpatialHadoop with Closest Pair Queries. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos; Yannis Manolopoulos (ADBIS, 2016)

LearneA - Design and Functionalities of a Hybrid Personalized Learning Electronic Assistant. - Nikolaos Mallios; Michael Vassilakopoulos (ICEIS (2), 2016)

Bulk-Loading xBR ^+ -trees. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (MEDI, 2016)

New plane-sweep algorithms for distance-based join queries in spatial databases. - George Roumelis; Antonio Corral; Michael Vassilakopoulos; Yannis Manolopoulos (GeoInformatica, 2016)

A Comparison of Distributed Spatial Data Management Systems for Processing Distance Join Queries. - Francisco García-García 001; Antonio Corral; Luis Iribarne; George Mavrommatis; Michael Vassilakopoulos (ADBIS, 2017)

SliceNBound: Solving Closest Pairs and Distance Join Queries in Apache Spark. - George Mavrommatis; Panagiotis Moutafis; Michael Vassilakopoulos; Francisco García-García 001; Antonio Corral (ADBIS, 2017)

Use-based Optimization of Spatial Access Methods. - Nikolaos Athanasiou; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (MEDES, 2017)

RkNN Query Processing in Distributed Spatial Infrastructures: A Performance Study. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos (MEDI, 2017)

Bulk Insertions into xBR ^+ -trees. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (MEDI, 2017)

Efficient query processing on large spatial databases: A performance study. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (J. Syst. Softw., 2017)

An Efficient Flash-aware Spatial Index for Points. - Anderson Chaves Carniel; George Roumelis; Ricardo Rodrigues Ciferri; Michael Vassilakopoulos; Antonio Corral; Cristina Dutra de Aguiar Ciferri (GEOINFO, 2018)

Voronoi-Diagram Based Partitioning for Distance Join Query Processing in SpatialHadoop. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos (MEDI, 2018)

Spatial Batch-Queries Processing Using xBR ^+ -trees in Solid-State Drives. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Athanasios Fevgas; Yannis Manolopoulos (MEDI, 2018)

An efficient algorithm for bulk-loading xBR+-trees. - George Roumelis; Michael Vassilakopoulos; Antonio Corral; Yannis Manolopoulos (Comput. Stand. Interfaces, 2018)

Efficient large-scale distance-based join queries in spatialhadoop. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos; Yannis Manolopoulos (GeoInformatica, 2018)

Closest-Pair Query. - Antonio Corral; Michael Vassilakopoulos (Encyclopedia of Database Systems (2nd ed.), 2018)

Quadtrees (and Family). - Michael Vassilakopoulos; Theodoros Tzouramanis (Encyclopedia of Database Systems (2nd ed.), 2018)

MRSLICE: Efficient RkNN Query Processing in SpatialHadoop. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos (MEDI, 2019)

MapReduce algorithms for the K group nearest-neighbor query. - Panagiotis Moutafis; Francisco García-García 001; George Mavrommatis; Michael Vassilakopoulos; Antonio Corral; Luis Iribarne (SAC, 2019)

Bulk-loading and bulk-insertion algorithms for xBR+-trees in Solid State Drives. - George Roumelis; Athanasios Fevgas; Michael Vassilakopoulos; Antonio Corral; Panayiotis Bozanis; Yannis Manolopoulos (Computing, 2019)

Efficient processing of all-k-nearest-neighbor queries in the MapReduce programming framework. - Panagiotis Moutafis; George Mavrommatis; Michael Vassilakopoulos; Spyros Sioutas (Data Knowl. Eng., 2019)

Indexing Points on Flash-based Solid State Drives using the xBR+-tree. - Anderson Chaves Carniel; George Roumelis; Ricardo Rodrigues Ciferri; Michael Vassilakopoulos; Antonio Corral; Cristina Dutra de Aguiar Ciferri (J. Inf. Data Manag., 2019)

In-memory k Nearest Neighbor GPU-based Query Processing. - Polychronis Velentzas; Michael Vassilakopoulos; Antonio Corral (GISTAM, 2020)

A Partitioning GPU-based Algorithm for Processing the k Nearest-Neighbor Query. - Polychronis Velentzas; Michael Vassilakopoulos; Antonio Corral (MEDES, 2020)

Parallel processing of spatial batch-queries using xBR+-trees in solid-state drives. - George Roumelis; Polychronis Velentzas; Michael Vassilakopoulos; Antonio Corral; Athanasios Fevgas; Yannis Manolopoulos (Clust. Comput., 2020)

Improving Distance-Join Query processing with Voronoi-Diagram based partitioning in SpatialHadoop. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos (Future Gener. Comput. Syst., 2020)

Efficient distance join query processing in distributed spatial data management systems. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos; Yannis Manolopoulos (Inf. Sci., 2020)

Enhancing Sedona (formerly GeoSpark) with Efficient k Nearest Neighbor Join Processing. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos (MEDI, 2021)

GPU-Based Algorithms for Processing the k Nearest-Neighbor Query on Disk-Resident Data. - Polychronis Velentzas; Michael Vassilakopoulos; Antonio Corral (MEDI, 2021)

Algorithms for processing the group K nearest-neighbor query on distributed frameworks. - Panagiotis Moutafis; Francisco García-García 001; George Mavrommatis; Michael Vassilakopoulos; Antonio Corral; Luis Iribarne (Distributed Parallel Databases, 2021)

Efficient Group K Nearest-Neighbor Spatial Query Processing in Apache Spark. - Panagiotis Moutafis; George Mavrommatis; Michael Vassilakopoulos; Antonio Corral (ISPRS Int. J. Geo Inf., 2021)

GPU-aided edge computing for processing the k nearest-neighbor query on SSD-resident data. - Polychronis Velentzas; Michael Vassilakopoulos; Antonio Corral (Internet Things, 2021)

Big Spatial and Spatio-Temporal Data Analytics Systems. - Polychronis Velentzas; Antonio Corral; Michael Vassilakopoulos (Trans. Large Scale Data Knowl. Centered Syst., 2021)

Hyper-parameters Tuning of Artificial Neural Networks: An Application in the Field of Recommender Systems. - Vaios Stergiopoulos; Michael Vassilakopoulos; Eleni Tousidou; Antonio Corral (ADBIS (Short Papers), 2022)

Porting disk-based spatial index structures to flash-based solid state drives. - Anderson Chaves Carniel; George Roumelis; Ricardo Rodrigues Ciferri; Michael Vassilakopoulos; Antonio Corral; Cristina Dutra de Aguiar Ciferri (GeoInformatica, 2022)

Academic Recommender Systems, Status, Challenges and Opportunities. - Vaios Stergiopoulos; Eleni Tousidou; Michael Vassilakopoulos; Antonio Corral (IISA, 2023)

Large Language Models versus Natural Language Understanding and Generation. - Nikitas Karanikolas; Eirini Manga; Nikoletta E. Samaridi; Eleni Tousidou; Michael Vassilakopoulos (PCI, 2023)

Efficient distributed algorithms for distance join queries in spark-based spatial analytics systems. - Francisco García-García 001; Antonio Corral; Luis Iribarne; Michael Vassilakopoulos (Int. J. Gen. Syst., 2023)

GPU-Based Algorithms for Processing the k Nearest-Neighbor Query on Spatial Data Using Partitioning and Concurrent Kernel Execution. - Polychronis Velentzas; Michael Vassilakopoulos; Antonio Corral; Christos Antonopoulos (Int. J. Parallel Program., 2023)

In-Memory Spatial-Keyword Indexing and Querying: An Experimental Evaluation. - Raúl García-Muñoz; Francisco García-García 001; Antonio Corral; Michael Vassilakopoulos (MEDI, 2024)

An academic recommender system on large citation data based on clustering, graph modeling and deep learning. - Vaios Stergiopoulos; Michael Vassilakopoulos; Eleni Tousidou; Antonio Corral (Knowl. Inf. Syst., 2024)

Conference Management System Utilizing an LLM-Based Recommendation System for the Reviewer Assignment Problem. - Vaios Stergiopoulos; Michael Vassilakopoulos; Eleni Tousidou; Spyridon Kavvathas; Antonio Corral (ICEIS (1), 2025)