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)

Prepartitioning in MapReduce Processing of Group Nearest-Neighbor Query. - Panagiotis Moutafis; George Mavrommatis; Polychronis Velentzas (PCI, 2020)

An Improved GPU-based Algorithmfor Processing the k Nearest Neighbor Query. - Polychronis Velentzas; Panagiotis Moutafis; George Mavrommatis (PCI, 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)

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

Parallel query processing on big spatial data - Polychronis Velentzas (2022)

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)

A Secure and Trustworthy Biometric Data Ecosystem for Cross-border Suspect Identification. - Katerina Kyriakou; Apostolos Apostolaras; Polychronis Velentzas; Georgios Benos; Konstantinos Koutsoukos; Chrysostomos Symvoulidis; Kaitai Liang; Zeshun Shi; Asterios Leonidis; Kyriaki Miniadou; Eleni Veroni; Spyridon Evangelatos; et al. (IEEE Big Data, 2024)