Editorials The city, its people, their health and tuberculosis City life appears destined to dominate the future of mankind in both the developed and developing world. If current trends persist into the coming decades, all population growth at global level will occur in towns and cities [1]. The number and size of big cities are set to increase. The proportion of the world's population living i...

Objective To describe the nationwide prevalence of childhood overweight/obesity, and their group variations and trends over the past 20 years in the Chinese urban population. Methods Data sets of boys and girls at the age of 7-18 years collected from the series of Chinese national surveillance on students’ constitution and health (CNSSCH) between 1985 and 2000 were divided into five socioeconom...

Due to the massive loss of leaves in parks and green spaces and big cities such as Isfahan and the lack of domestic production of leaf vacuum shredder machine for use in large green spaces of parks, the design and construction of the collecting and recycling by the system is need so the design of the vaccum section which is one of the main parts and includes entrance, channels and ducts and exh...

This paper provides a new geospatial perspective on whether or not Zipf’s law holds for all cities or for the largest cities in the United States using a massive dataset and its computing. A major problem around this issue is how to define cities or city boundaries. Most of the investigations of Zipf’s law rely on the demarcations of cities imposed by census data, e.g., metropolitan areas and c...

by shouldering the burden of a big chunk of global production, and giving shelter to half of the world’s population, currently cities play an important role in national economies. benefits of agglomeration in cities have played a major role in the process of economic development of different countries, however, the expansion of urbanization has produced some problems including environmental and...