By Martin Theobald, Luc De Raedt, Maximilian Dylla, Angelika Kimmig, Iris Miliaraki (auth.), Barbara Catania, Giovanna Guerrini, Jaroslav Pokorný (eds.)

This booklet constitutes the completely refereed complaints of the seventeenth East-European convention on Advances in Databases and knowledge structures, ADBIS 2013, held in Genoa, Italy, in September 2013. The 26 revised complete papers provided including 3 invited papers have been rigorously chosen and reviewed from ninety two submissions. The papers are prepared in topical sections on ontologies; indexing; info mining; OLAP; XML info processing; querying; similarity seek; GPU; querying in parallel architectures; functionality evaluate; allotted architectures.

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Additional resources for Advances in Databases and Information Systems: 17th East European Conference, ADBIS 2013, Genoa, Italy, September 1-4, 2013. Proceedings

Example text

In: SIGMOD 1993 (1993) 9. : Spatial Joins Using Seeded Trees. In: SIGMOD 1994 (1994) 10. : Size Separation Spatial Join. In: SIGMOD 1997 (1997) 11. : Partition Based Spatial-Merge Join. In: SIGMOD 1996 (1996) 12. : Accelerating range queries for brain simulations. In: ICDE 2012 (2012) 13. : Scout: Prefetching for latent structure following queries. In: VLDB 2012 (2012) 14. : TOUCH: In-Memory Spatial Join by Hierarchical Data-Oriented Partitioning. In: SIGMOD 2013 (2013) 15. : The R+-Tree: A Dynamic Index for Multi-Dimensional Objects.

Tauheed et al. The experiment shown in Figure 2 where we increase the density of the dataset and measure point query performance of different R-tree based approaches [16,17,18] clearly demonstrates the problem of overlap. Point queries are a good indicator of overlap in R-Trees: the number of nodes retrieved from disk should be in the order of the height of the tree (five in this case) in the absence of overlap. As the results in Figure 2 show, however, the overlap grows rapidly with increasing dataset density, translating into a higher execution time and thus degraded performance.

In: SIGMOD 1996 (1996) 12. : Accelerating range queries for brain simulations. In: ICDE 2012 (2012) 13. : Scout: Prefetching for latent structure following queries. In: VLDB 2012 (2012) 14. : TOUCH: In-Memory Spatial Join by Hierarchical Data-Oriented Partitioning. In: SIGMOD 2013 (2013) 15. : The R+-Tree: A Dynamic Index for Multi-Dimensional Objects. In: VLDB 1987 (1987) 16. : STR: a Simple and Efficient Algorithm for R-tree Packing. In: ICDE 1997 (1997) 17. : The Priority R-tree: A Practically Efficient and Worst-case Optimal R-Tree.

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