Context of contents for optimal user experience can be composed of various elements including time, spatial context, and social context. And also including global, local and personal contexts. In this paper, we proposed a representation scheme of spatial context hierarchy for optimal content services. Proposed context representation consists of time and spatial index and relations makes formal ...

the interactions and linkages between urban centers and peripheral settlements are increasingly recognized as key factors in the process of social, economic and environmental changes in peripheral settlements. despite this, most practices are implicitly based on a dichotomous view of population and activities in urban and peripheral area. this paper presents that how interactions between urba...

IMPORTANCE Little is known about recent trends in rural-urban disparities in youth suicide, particularly sex- and method-specific changes. Documenting the extent of these disparities is critical for the development of policies and programs aimed at eliminating geographic disparities. OBJECTIVE To examine trends in US suicide mortality for adolescents and young adults across the rural-urban co...

Urban remote sensing research and approaches to modelling residential mobility focus predominantly on growth patterns. In this paper, the phenomenon of extreme urban decline, named ‘shrinkage’, is scrutinised. The different characteristics of urban decline are illuminated using a multi-scale approach. Selected patterns of the spatial growth and shrinkage are first calculated by means of satelli...

Understanding the causes of the intra-urban air temperature variability is a first step in improving urban landscape design to ameliorate urban thermal environment. Here we investigated the spatial and temporal variations of air temperature at a local scale in Beijing, and their relationships with three categories of landscape design parameters, including the land cover features, site geometry,...

A methodology is developed in this paper for evaluating and enhancing the performance of urban transportation systems in the aftermath of a disaster. A performance measure is proposed for assessing overall and distributional impacts based on the concept of accessibility. The methodology is demonstrated with two case studies. The first focuses on passenger railroad disruption in the catastrophic...

The present study was conducted to investigate the social and demographic analysis of urban-rural disparities in Khyber Pakhtunkhwa, Pakistan during 2010. Multi-stage random sampling method was used for selection of sample size by taking 1320 and 720 respondents from the urban and rural areas of the province respectively. Chi-square test was used for ascertaining the association between the att...

Monitoring spatiotemporal changes in urban agglomorations will become increasingly important as the number and proportion of urban residents continue to increase. Intra-urban variations in vegetation abundance influence environmental conditions and energy fluxes by selective reflection and absorbtion of solar radiation, by modulation of evapotranspiration and by sequestration of pollutants. The...

Contrast thresholds for 75% correct depth identification in narrow-band filtered random dot stereograms were determined for different center spatial frequencies and binocular disparities. Rigorous control over vergence was maintained during testing, and a forced-choice procedure was used. The resulting contrast sensitivity function for stereopsis revealed sensitivity over a greater range of dis...