Many efforts have been devoted to the treatment of spatial data in databases both in traditional database systems and decision support systems or On-Line Analytical Processing (OLAP) technologies in datawarehouses (DW). Nevertheless, many open questions concerning this kind of data still remain. The work presented in this paper is focused on dealing with the spatial and temporal granularity wit...

Multi-resolution approach is used to derive homogenized (large scale) formulation for propagation of waves in complex laminates. Basic entities such as boundary conditions, spatial and temporal spectrum (eigenvalues and resonances), Wronskian, modal expansions, and Green function representations associated with the homogenized formulation are discussed. The relations between them and their gene...

The spatial structure of optically heterogeneous turbid media is probed with diffusive light. Projection images are obtained experimentally by deconvolution of the scattered diffuse-photon density waves on a planar boundary by use of a fast Fourier transform. The method is very fast, permitting object localization and characterization in ~1000 volume-element samples on subsecond computational t...

Multi-resolution approach is used to derive homogenized (large-scale) formulation for propagation of waves in complex laminates. Basic entities such as boundary conditions, spatial and temporal spectrum (eigenvalues and resonances), Wronskian, modal expansions, and Green function representations associated with the homogenized formulation are discussed. The relations between them and their gene...

A Reconciliation of Logical Representations of Space: from Multidimensional Mereotopology to Geometry Torsten Hahmann Doctor of Philosophy Graduate Department of Computer Science University of Toronto 2013 Reasoning about spatial knowledge is an important aspect of computational intelligence. Humans easily switch between high-level and low-level spatial knowledge, while computers have tradition...

â â â  some of the necessary approaches to access the sustainable and balanced development process for investment and fulfillment of developmen projects are spatial planning, determining operational scales and locating tourism centers scientifically. in this paper as part of the results of a great research project in bazoft area of chaharmahal bakhteari, over of functional-structural view, with...

Study of the land-use/land cover (LULC) changes close to the boundary of the buildup area (urban fringe) provides deeper understanding of a land-use dynamics at different spatial and temporal scales. Few thoughts have given to the analysis of complicated spatial landscape at a fringe area. The aim of this paper is to resolve this bias by focusing on these interfaces. Results of this paper show ...

We present two novel parallel algorithms for rapidly constructing bounding volume hierarchies on manycore GPUs. The first uses a linear ordering derived from spatial Morton codes to build hierarchies extremely quickly and with high parallel scalability. The second is a top-down approach that uses the surface area heuristic (SAH) to build hierarchies optimized for fast ray tracing. Both algorith...

Although information flow in the neocortex has an apparent hierarchical organization, there is much ambiguity with respect to the definition of such a hierarchy, particularly in higher cortical regions. This ambiguity has been addressed by utilizing observable anatomical criteria, based upon tract tracing experiments, to constrain the definition of hierarchy [Felleman D.J. and van Essen D.C., 1...

This paper describes research conducted in order to introduce traditionally static spatial concepts, like generalisation, into a temporal schema and study their aspects concerning Change over time. Temporal generalisation regards the representation of each object and its Changes over different time scales. It is within the logic of the proposed model to contain strict formalizations of the obje...