Sustainability of agriculture is challenged by increasing sprawl in urban agglomerations. Under increasing agglomeration economies in large and even medium sized cities, more and more soil is being subtracted to agriculture, depriving agricultural activities of the main production factor. The extent to which the expanding urbanization threatens agricultural development depends on the urban spat...

Cities are characterized by concentrating population, economic activity and services. However, not all cities are equal and a natural hierarchy at local, regional or global scales spontaneously emerges. In this work, we introduce a method to quantify city influence using geolocated tweets to characterize human mobility. Rome and Paris appear consistently as the cities attracting most diverse vi...

Although several studies examine the barriers to employment that limit the employability of welfare recipients, they have not analyzed how these barriers might be different for residents of central cities than for residents in surrounding suburban areas. We consider how the prevalence of barriers to employment varies by race and place in metropolitan Detroit. We find that the prevalence of ment...

The increasing number of crimes in areas with large concentrations of people have made cities one of the main sources of violence. Understanding characteristics of how crime rate expands and its relations with the cities size goes beyond an academic question, being a central issue for contemporary society. Here, we characterize and analyze quantitative aspects of murders in the period from 1980...

OBJECTIVE To determine the frequency of Methicillin resistance Staphylococcus aureus infection in major cities of Pakistan. SETTING Various laboratories of the country with one as the central Laboratory. MATERIALS AND METHODS Seven hundred and ninety two consecutive clinical isolates of Staphylococcus aureus were collected from 8 laboratories all over Pakistan i.e. Karachi, Peshawar, Lahore...

BACKGROUND Cardiovascular disease is a major cause of death, and its mortality is increasing in Latin America. However, population-based data on cardiovascular disease risk factors are sparse in these countries. METHODS A total of 7524 men and women, aged 35 to 74 years old, were recruited between February 2010 and December 2011 from randomly selected samples in 4 cities (Bariloche and Marcos...

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...

The last two decades have witnessed an increasing focus on the role of cities and regions at global, European, national and sub-national levels. In terms of thinking within the European Union (EU) regions, including city-regions/metropolitan regions, are seen as playing a key role in Europe’s development. In fact, it is widely asserted that cities have been, and in the future will be, the engin...

The present paper focuses on determining the most important factors affecting urban growth in large cities of Iran through modeling and comparing the common and diverse points of urban growth obtained from other studies. For this purpose, by reviewing the theoretical concepts associated with urban growth, quantities and measurable variables are developed as proper frameworks to study the influe...