Kahng, A.B. and G. Robins, Optimal algorithms for extracting spatial regularity in images, Pattern Recognition Letters 12 (1991) 757-764. Finding spatial regularity in images is important in military applications (e.g., finding rows of landmines), texture analysis, and other areas. We give an optimal ®(n 2) algorithm for finding all maximal equally-spaced cnllinear subsets within a pointset in ...

introduction: the accuracy of analyzing functional mri (fmri) data is usually decreases in the presence of noise and artifact sources. a common solution in for analyzing fmri data having high noise is to use suitable preprocessing methods with the aim of data denoising. some effects of preprocessing methods on the parametric methods such as general linear model (glm) have previously been evalua...

this study investigates the effectiveness of the kriging interpolation model and the emission weighted proximity model (ewpm) in assessing relative exposure risk of air pollution using results from the american meteorological society/epa regulatory model (aermod) as benchmarks. we used simulated exposure risk to so2 in the dallas area in texas in this evaluation. results suggest that the relati...

Understanding the temporal and spatial variability in a crop yield is viewed as one of the key steps in the implementation of precision agriculture practices. Therefore, a study on a center pivot irrigated 23.5 ha field in Saudi Arabia was conducted to assess the variability in alfalfa yield using Landsat-8 imagery and a hay yield monitor data. In addition, the study was designed to also explor...

Spatial technologies such as GPS and GIS increasingly form the basis for site-specific management in crop production. This paper assesses the contribution of an explicit spatial econometric methodology in the estimation of crop yield functions that are used to optimize fertilizer application. The specific case study is for Nitrogen (N) application to corn production in Argentina, where the impl...

the relationships between topography and crop yield. Graveel et al. (1989) observed that corn yields were The purpose of this study was to relate the temporal and spatial more variable on steep slopes but found no significant variability of corn (Zea mays L.) grain yield on a Typic Fragiochrept soil on a hillslope to soil properties and topographic features. Corn differences for degree of slope...

introduction one of the critical issues associated with sustainability in the twenty-first century is how cities are growing and developing in the space. rapid urban growth and physical development of cities cause disintegration of the spatial organization of cities and consequently spatial inequality between urban spaces. this phenomenon can be considered as spatial segregation or fragmentatio...