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نویسنده
چکیده
Definition The indexing set of dimension p in a particular space; denoted by IP P is the set of all indexing points of p in that space. A spatial database allows for storing and retrieving spatial objects and consists of spatial relations which may contain spatial as well as non-spatial data. Spatial data can be points. lines, rectangles, surfaces. or more complex objects. Similar to other database systems. efficient query processing relies upon auxiliary data structures used to support spatial indexing of these objects. In this paper. we discuss how the SB+-tree can be used to process the spatial selection and join operations: PointContainment and Regions-Containment respectively.
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Biological aspects of Cyclocephala tucumana Brethes, 1904 and Cyclocephala melanocephala (Fabricius, 1775) (Coleoptera: Scarabaeidae)
The studies were conducted on the biological aspects of Cyclocephala tucumana Brethes, 1904 and C. melanocephala (Fabricius, 1775) in Aquidauana, MS, Brazil. From January to December 2009 a light trap was installed to make collections of adults of C. tucumana and from January 2010 to February 2011 for collections of adults of C. melanocephala, at the experimental farm of the Universidade Estadu...
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A 55 year old man with intermittent WolVParkinson-White (WPW) syndrome had an episode of atrial fibrillation (AF) that lasted for 117 days. After interruption of the AF a Äwave appeared that lasted for two days and then disappeared. Exercise stress and isoprenaline infusion could not reproduce the Äwave, but after another episode of AF which lasted for seven days a persistent Äwave appeared tha...
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