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Plane-Sweep Incremental Algorithm: Computing Delaunay Tessellations of Large Datasets
Márton Trencséni, István Csabai
We present the plane-sweep incremental algorithm, a hybrid approach for computing Delaunay tessellations of large point sets whose size exceeds the computer's main memory. This app…
Strong random correlations in networks of heterogeneous agents
Imre Kondor, István Csabai, Gábor Papp +3
Correlations and other collective phenomena in a schematic model of heterogeneous binary agents (individual spin-glass samples) are considered on the complete graph and also on 2d…
Spatial Indexing of Large Multidimensional Databases
István Csabai, Márton Trencséni, Géza Herczegh +5
Scientific endeavors such as large astronomical surveys generate databases on the terabyte scale. These, usually multidimensional databases must be visualized and mined in order to…
Revealing a strongly reddened, faint active galactic nucleus population by stacking deep co-added images
József Varga, István Csabai, László Dobos
More than half of the sources identified by recent radio sky surveys have not been detected by wide-field optical surveys. We present a study based on our co-added image stacking t…
SkyQuery: An Implementation of a Parallel Probabilistic Join Engine for Cross-Identification of Multiple Astronomical Databases
László Dobos, Tamás Budavári, Nolan Li +2
Multi-wavelength astronomical studies require cross-identification of detections of the same celestial objects in multiple catalogs based on spherical coordinates and other propert…