Processos de urbanização

Segregation has been one of the most persistent features of urban life and, accordingly, one of the main subjects of enquiry in urban studies. Stemming from a tradition that can be traced back to the Chicago School in the early twentieth century, social segregation has been seen as the natural consequence of the social division of space. Such naturalized understanding of segregation as ‘territorial segregation' takes space as a surrogate for social distance. We propose a shift in the focus from the static segregation of places—where social distance is assumed rather than fully explained—to how social segregation is reproduced through embodied urban trajectories. We aim to accomplish this by exploring the spatial behaviour of different social groups as networks of movement that constitute opportunities for co-presence. This alternative view recasts the original idea of segregation as ‘restrictions on interaction' by concentrating on the spatiality of segregation potentially active in the circumstances of social contact and encounters in the city. This approach to segregation as a subtle process that operates ultimately through trajectories of the body is illustrated by an empirical study in a Brazilian city.

One of the main factors of imbalance in the urban development of cities is undoubtedly their growth rate. In this sense, one of the main characteristics of rural-urban migration phenomena that have shaped the development of megacities in developing countries has been the need to integrate a large mass of people through processes of rapid growth of its urban plot. In this paper the growth of five different cities in Latin America is analyzed from the perspective of the impact of these processes of transformation in the urban landscape, describing different levels of pathology in their development. Consumption of periurban space, cityscape misconfiguration, or the longterm sustainability of these processes of transformation are complex issues that need to be addressed from a rigorous and technical perspective. These variables will be subject to GIS evaluation and diagnosis by territorial indicators in order to establish patterns of behaviour.

This paper examines the effects of the new economy on national city size distribution in 102 countries. Results show that the new economy has significant effects on city size distributions and such effects are heterogeneous across countries. Human capital contributes to the polarization of city size distribution in developed countries and service-dominated countries, while it helps to equalize city size distribution in industrial-dominated countries. While innovation promotes an equalized city size distribution in general, globalization promotes polarization and then equalization of city size distribution. Information and communication technology triggers an equalized followed by a polarized city size distribution, and has contributed to an equalized city size distribution in service-dominated countries. It is evident that thriving new economic processes are changing the global urban hierarchy and reshaping national city size distribution. This study facilitates an in-depth understanding of the effects of the new economy on city size distribution, which is of great importance to promote more equitable development and urbanization.

Municipal Solid Waste Management (MSWM) is a challenging issue for low-income countries, impacting on the environment, socio-economic, health, aesthetics and infrastructure, due to the generated volume of wastes, treatment and disposal methods. This challenge is often impacted by the transitioning of MSWM from mostly unsustainable methods to a sustainable level. A meaningful MSWM transition requires an understanding and consideration of historical developments and common themes. This paper reviews the common themes limiting MSWM sustainability in the BRIC (Brazil, Russia, India and China) countries as well as the historical transition of MSWM to a sustainable level in some high-income countries (United States, Japan, Denmark, and Australia). The study focuses on the interaction of MSWM with technology systems, related environmental issues, socioeconomic factors, influence on policy and decision making. The objective of the paper is to develop a holistic MSWM framework to address the prevailing issues, by systematic analysis of related and relevant literatures. The key MSWM findings drawn from the BRIC countries in this study is used to develop a thematic framework, underpinned by the different interacting factors of policy; environmental; socio-economic; and technology (PEST). The PEST thematic framework presents an adaptable systematic tool to policy and decision makers towards improving MSWM in low-income countries.

Brazil, Russia, India, China and South Africa (BRICS) as the emerging leading powers in the world have great influence on the world development. Urbanization process has been a significant engine for development in these countries, which has important effect on the sustainable development globally. However, rapid urbanization has induced various problems, such as air pollution, traffic congestion, habitat destruction, and loss of arable land. These problems present the threats to the sustainable development of urbanization in these countries. This paper presents an evaluation on the dynamic sustainability performance during urbanization process in these countries by applying an elastic coefficient method and a new-type McKinsey matrix. The data used for analysis are collected from World Bank database for the period of 1990-2011. The findings from this study suggest that during the surveyed period the Brazil, Russia and India have been engaging a sustainable urbanization practice, whilst the urbanization processes in China and South Africa are unsustainable. The study provides valuable reference in searching for solutions to further promote sustainable urbanization practice globally.

The paper is based on quantitative evidence and case examples of city learning drawn from both developed and developing countries to explore selected questions raised in the literature on learning and competitiveness. Anecdotal and quantitative evidence suggest that a large shadow market for knowledge has already formed among cities around the world. Case observations reviewed here suggest that the best learners are deliberate and systematic, finding or creating new knowledge, converting it to use, and storing learning experiences that draw on collective memory. Acquired knowledge resides in two main forms: one is hard data, stored in documents, computers, or specialized units of government. Another is soft data stored in professional and social networks that link a wide array of actors in the community - not just staff in the city bureaucracy. The analysis leads to a number of propositions that deserve attention and testing: several kinds of learning systems can be observed, that the process of learning may be as important as the product in contributing to competitiveness, that policies can helpful to facilitate learning, and that a radical departure from customary policy, especially in donor institutions, may be needed to effectively meet requirements of institutional capacity building in cities of the developing world.

This article discusses the relationship between segregation and urban redevelopment projects through an analysis of São Paulo's metropolis. Our assumption is that segregation is one of the components of capitalist urban space, since it is produced as a commodity, which determines its fragmentation and hierarchy. In the peripheral countries, this condition prevents thousands of people to live with dignity. In recent decades, the space production has become a possibility of investment for the capital in crisis. This situation reveals the importance of the urban renewal projects, because they reinforce public and private investments in specific areas of the cities, increasing its valuation. In this article, the analysis of Nova Luz Project shows that the segregation is a content of contemporary urbanism and that the city's production process is increasingly tied to the private interests and to the capital.

Focusing on the labor market outcomes, we present the research methodology discussing the strategy to get rid of the usual identification hypothesis that restricts job locations to the central business district (CBD). Our strategy allows dealing with the simultaneous nature of business and housing locations, and urban prices determination in a richer geographical setting. Before proceeding to that, we look at some stylized facts concerning the spatial structure of our study region.