نتایج جستجو برای: urban regions
تعداد نتایج: 516030 فیلتر نتایج به سال:
BACKGROUND Great health inequalities have been reported in China over the past few years. Height has been used as an important parameter of health and it may also be distributed unequally in different regions. By studying height data of Chinese children and adolescents aged 7 to 18 years, we analyze height inequalities and their change trends during 1985-2010. METHODS On the base of data from...
Urban areas are a complex combination of various land-cover types, and show a variety of land-use structures and spatial layouts. Furthermore, the spectral similarity between built-up areas and bare land is a great challenge when using high spatial resolution remote sensing images to map urban areas, especially for images obtained in dry and cold seasons or high-latitude regions. In this study,...
the urban squatter settlements is an urban phenomenon which is formed and developed by uncontrolled and irregular urbanization growth in the world and in iran as well and also by migration from the villages towards the cities. urban squatter settlements, as an unbalancing factor in the urban physical equilibrium, is a sign of irregular growth in the cities and the regions and many of the urbani...
Although hepatitis B has been well studied, there are still aspects of its epidemiology that remain to be clarified. There are many regions with high seroprevalence, particularly in the developing regions of the world, and these regions are known to have different epidemiologic patterns. Nonetheless, there are currently no data on the differences in hepatitis B seroprevalence between urban and ...
Urban growth and land use change models are an important and innovative tool that support planning and development of sustainable urban areas. The data requirements for parameterization, calibration and validation of urban models are intense due to the complexity of the models and their objectives. In this study several urban land use change models are evaluated and their demands on spatial dat...
The European Landscape Convention urges countries to involve stakeholders including citizens in the governance of ordinary (urban) landscapes. This paper studies conflicting stakeholder perspectives on urban landscape quality context sustainability transitions six regions Netherlands, Italy, France, Croatia, Belarus and Russian Federation. Repertory grid technique helped identify dimensions thr...
Based on field data from 10 USA cities and national urban tree cover data, it is estimated that urban trees in the coterminous USA currently store 700 million tonnes of carbon ($14,300 million value) with a gross carbon sequestration rate of 22.8 million tC/yr ($460 million/year). Carbon storage within cities ranges from 1.2 million tC in New York, NY, to 19,300 tC in Jersey City, NJ. Regions w...
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