Titlebook: Constraint Databases and Applications; First International Bart Kuijpers,Peter Revesz Conference proceedings 2004 Springer-Verlag Berlin H

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Constraint Databases, Data Structures and Efficient Query Evaluationn particular, the expressive power of first-order logic over the reals, as a constraint database query language, has been studied extensively. The difficulty of the effective evaluation of first-order queries, usually involving some form of quantifier elimination, has been largely neglected..The con

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A New Shape Function Based Spatiotemporal Interpolation Methode) product and the tetrahedral spatiotemporal interpolation methods, this new method is also based on shape functions. However, instead of only manipulating the time dimension as in the ST product and the tetrahedral methods, our new method combines 2-D shape functions in the (x,y) domain with the (

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Moving Objects and Their Equations of Motionw, or more specifically according to Newton’s second law of motion, a moving object is fully described by its equation of motion. We introduce a new data model for moving objects in which a trajectory is represented by a differential equation. A similar approach is taken in computer animation where

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A Triangle-Based Logic for Affine-Invariant Querying of Two-Dimensional Spatial Datapresenting and querying the data in an affine-invariant manner, we can avoid these incompatibilities..In practice, spatial (resp., spatio-temporal) data is often represented as a finite union of triangles (resp., moving triangles). As two arbitrary triangles are equal up to a unique affinity of the

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