Measures of wealth and production have been found to scale superlinearly with the population of a city. Therefore, it makes economic sense for humans to congregate together in dense settlements. A recent model of population dynamics showed that population growth can become superexponential due to the superlinear scaling of production with population in a city. Here, we generalize this populatio...

Population density gradients for South Africa’s cities are quite small in absolute value, indicating a relatively flat population distribution across the cities. In contrast employment is less flatly distributed than the population. The relationship between employment densities and distance across South African cities has remained constant between 1996 and 2001 whilst there has been on average ...

In New York City, the administration of health care provided within the jail system is markedly different from that in other jurisdictions across the country. By virtue of the city charter, the Department of Health and Mental Health (DOHMH) manages all aspects of health care within the jail system, while the Department of Correction (DOC) supervises the rest of the jail system. This means that ...

BACKGROUND The incidence of chronic obstructive pulmonary disease (COPD) and bronchial asthma began increasing in early 1960s in the population of Yokkaichi-city (Mie Prefecture, Japan). The cause of the disease was sulfur oxide air pollution, and it is known as Yokkaichi Asthma. The pollution markedly decreased by the end of 1970s; no new cases have been reported since 1988. This study aimed a...

STUDY POPULATION. Four hundred students with physiciandiagnosed asthma attending inner-city elementary schools are currently being recruited from screening surveys collected during the spring and phenotypically characterized at baseline in the summer in an ongoing longitudinal study (SICAS [School Inner-City Asthma Study]). The primary purpose of the study is to evaluate the role of indoor alle...

This paper analyzes slum dwellers access to basic amenities and the ways in which they gain access. Mumbai city is a city of the haves and a city of the have-nots. Among these two, one is grimy (slum) and other one is neat (non-slum). They are two distinct but inter-dependent and give Mumbai a part of its character. As per 2011 census the total population of Mumbai was 12.48 Millions. The city ...

There is still limited understanding of key determinants of spatial spread of influenza. The 1918 pandemic provides an opportunity to elucidate spatial determinants of spread on a large scale. To better characterize the spread of the 1918 major wave, we fitted a range of city-to-city transmission models to mortality data collected for 246 population centres in England and Wales and 47 cities in...

STUDY POPULATION. Four hundred students with physiciandiagnosed asthma attending inner-city elementary schools are currently being recruited from screening surveys collected during the spring and phenotypically characterized at baseline in the summer in an ongoing longitudinal study (SICAS [School Inner-City Asthma Study]). The primary purpose of the study is to evaluate the role of indoor alle...

in a survey of the population of behbahan city, carried out in years 1990-91, the mean age was approximated up to 15.2 and 17.5 in the villages and the city, respectively. furthermore, about 27.4% and 27.9% of the corresponding populations were under 5 years of age. the birth rate in the urban and rural areas was about 31.2 and 33.3 per thousand live births. mortality rate related to the immatu...