An urban social movement challenging urban regeneration: The case of Sulukule, Istanbul

Urban regeneration projects have become a focus of attention in Istanbul due to tourism promotion, particularly great expectations from the European Capital of Culture 2010 Event. Sulukule, a Romani neighborhood on the historical peninsula of Istanbul, was designated as an urban redevelopment zone. The Sulukule Urban Regeneration Project is one of the recent efforts to present “a better urban environment” to foreign visitors and investors. The project has accelerated the struggle for land, causing dispossessions, evictions and demolitions. Locals’ needs and rights are denied. Consequently, the citizens in Sulukule started to oppose regeneration and formed an urban social movement. This paper attempts to analyze the urban social movement in Sulukule, the Sulukule Platform, which emerged as an urban coalition challenging tourism-led regeneration.     

Rescaling metropolitan governance: examining discourses and conflicts in two Swiss metropolitan areas

Due to their nodal position in economic and social development, metropolitan areas give impetus to globalization. In turn, they are themselves transformed by this process. However, the question of how metropolitan areas transform by participating in the process of globalization is subject to debate. Based on case studies of two Swiss metropolitan areas (Berne and Zurich) and two policy domains (public transport and urban foreign policy), we argue that the rescaling process in metropolitan areas depends on the global competitiveness pressure the cities face and on the meaning that political actors give to these global pressures.     

The incubator hypothesis: Re-vitalization of metropolitan areas?

In this paper spatial and temporal dimensions of technical innovations will be dealt with in both a theoretical and an empirical sense. In this framework, a first aim is to make a systematic typology of different innovations. As far as the regional context is concerned, a theoretical framework will be designed for identifying which regions will most likely “specialize” in certain kinds of innovations. In this respect, our analytical framework can ascertain, for example, whether the central (metropolitan) areas tend to be in a favourable position regarding high quality product innovations, while the more peripheral zones will be more oriented towards process innovations. These hypotheses are then tested, using industrial survey data, by means of contingency table and regression analysis. In general, the empirical results give (some) support to the above mentioned “spatial specialization” hypothesis.     

Modeling urban intersection form:Measurements,patterns,and distributions

Intersections appear where one street crosses another,acting as fundamental nodes embedded in the network of urban public space.Though discussed in configurational and perceptive studies,limited attention has been paid to the morphological aspects of inter-sections.This study proposes and tested a new approach to modeling the urban intersection form.First,effective cylinder was introduced to define the related space for each intersection based on its scale.Second,a set of morphological indicators were presented to measure the physical properties of the intersection form.Third,the affinity propagation algorithm was used to examine the patterns of intersection form.Using the Old City of Nanjing,China as the study area,844 intersections were analyzed to test this new method.As a result,we were able to classify the intersections into eight types.This study shows that the intersection can be modelled as a volumetric and integral spatial unit of urban form,which may demand more attention from urban designers and architects in the future for shaping the built environment.The quantitative nature of our method could also open more possibilities for intersection-based studies.     

Modeling urban intersection form: Measurements,patterns, and distributions

Intersections appear where one street crosses another, acting as fundamental nodes embedded in the network of urban public space. Though discussed in configurational and perceptive studies, limited attention has been paid to the morphological aspects of intersections. This study proposes and tested a new approach to modeling the urban intersection form. First, effective cylinder was introduced to define the related space for each intersection based on its scale. Second, a set of morphological indicators were presented to measure the physical properties of the intersection form. Third, the affinity propagation algorithm was used to examine the patterns of intersection form. Using the Old City of Nanjing, China as the study area, 844 intersections were analyzed to test this new method. As a result, we were able to classify the intersections into eight types. This study shows that the intersection can be modelled as a volumetric and integral spatial unit of urban form, which may demand more attention from urban designers and architects in the future for shaping the built environment. The quantitative nature of our method could also open more possibilities for intersection-based studies.     

Feeding the global city: urban transformation and urban food supply chain in 21st-century Istanbul

ABSTRACT

This article focuses on the effects of urban transformation on the urban food supply chain in 21st century Istanbul. The article begins with a discussion on the particularities of the urban transformation that has shaped the city since the 1980s, emphasizing tendencies that are relevant to food consumption and supply patterns and practices. Next, 6 categories of fresh fruits and vegetables (FFVs), provisioning agents (mixed/foreign-capital supermarkets, domestic-capital supermarkets, bazaars, local suppliers, and urban and semi-urban/peripheral farmers, internet or store-based alternative food networks) are analyzed in terms of their perception of urban transformation and various challenges it poses. The article concludes with an assessment of the changes in the city’s food supply chain in light of provisioning agents’ responses to the urban transformation as a force that either enables them compete more successfully and expand their operations or pushes them to contract or even leave the provisioning sector completely.     

城市非建设用地对雨洪管理的影响

针对城市的防洪排涝控制、雨水安全排放等问题,探讨了如何构建高效的雨洪控制管理体系,详细介绍了城市雨洪管理的三种模式及自然水体在城市雨洪管理中的地位,并分析了LUCC对城市水安全问题的影响因素,以从根本上减少城市水安全问题。     

Large metropolitan water demand forecasting using DAN2, FTDNN,and KNN models: A case study of the city of Tehran,Iran

Efficient operation of urban water systems necessitates accurate water demand forecasting. We present daily, weekly, and monthly water demand forecasting using dynamic artificial neural network (DAN2), focused time-delay neural network (FTDNN), and K-nearest neighbor (KNN) models for the city of Tehran. The daily model investigates whether partitioning weekdays into weekends and non-weekends can improve forecast results; it did not. The weekly model yielded good results by using the summation of the daily forecast values into their corresponding weeks. The monthly results showed that partitioning the year into high and low seasons can improve forecast accuracy. All three models offer very good results for water demand forecasting. DAN2, the best model, yielded forecasting accuracies of 96%, 99%, and 98%, for daily, weekly, and monthly models respectively.     

Accessibility and density distributions in metropolitan areas: Theory and empirical studies

This paper shows that household location theory should probably be based on another foundation that the von Thunen-Muth-Alonso-Mills paradigm of location in relation to some predetermined market place or CBD. We argue that the formation of such centres is part of an interdependency analysis of the working of a metropolitan area. Such an interdependency principle is partially tested in this paper. Based on econometrically estimated parameters it has been possible to simulate the equilibrium structure of population in 1977 based on data from the Stockholm region in 1975. The fit is remarkably close and suggests that further development of this type of model is likely to be worthwhile.     

A multi-scale analysis of urban form and commuting change in a small metropolitan area (1990–2000)

Issues of growth, especially the spatial nature of recent urban development and its implications for travel patterns, have received a great deal of attention. In particular, questions persist as to how the spatial distribution of workers and jobs influences commute patterns. This paper investigates changes in commuting and land use patterns using measures of jobs–housing balance, commuting efficiency and other statistics. A smaller urban area is chosen for study (Tallahassee, FL, USA)and data on its workers, jobs, and commute patterns are obtained from the Census Transportation Planning Package for 1990 and 2000. The key research questions investigated probe whether there were substantial changes in urban form and commuting over the period. A two-tiered approach is taken where change is explored at the regional and local scales using GIS, optimization procedures, and inferential statistical techniques. The results reveal the extent of the spatial changes in the study area between 1990 and 2000. Major findings included stability in urban structure over the time period, as well as a persistent strong relationship between land use and commute patterns. These results are discussed in light of their implications for other cities and for future work.     

Public value capturing in urban renewal: the fikirtepe case (Istanbul,Turkey)

Journal of Housing and the Built Environment - Public Value Capture (PVC) refers to the capture of the value created through the efforts of public bodies rather than from those of private...     

Youthification across the metropolitan system: Intra-urban residential geographies of young adults in North American metropolitan areas

The youthification hypothesis posits that young adult geographies are highly centralized, particularly in metropolitan regions with gentrified, amenity-rich downtowns successful in the knowledge economy. While prior studies have empirically substantiated centralized young adult geographies, none have considered intra-urban variations and linked these empirically to metropolitan-specific characteristics. Focusing on young adults aged 25 to 34 across 57 metropolitan regions in the United States and Canada with populations over one million, this study investigates how the residential geographies of young adults vary within and between metropolitan regions. Young adult geographies are analyzed via generalized additive models with cubic spline smoothing. Economic, housing, urban form, and demographic characteristics are compared between regions with different types of young adult geographies. Results show youthification to be widespread; young adult clusters exist in the downtowns of 56 metropolitan regions, with 31 regions having one downtown-focused young adult cluster and 25 regions having a multi-cluster profile. Only one region had a scattered profile with no clusters. Regions with a single centrally-located young adult profile had greater employment in the quaternary sector, higher public transit mode shares, fewer single-detached homes, and lower employment in manufacturing than those with multiple clusters. The study contributes to understanding the ways in which the residential geographies of specific age groups are shaped by aggregate characteristics of cohorts and the existing urban structures.     

Simulating the effects of climate change,economic and urban planning scenarios on urban runoff patterns of a metropolitan region

Urban development and climate change are expected to have significant effects on urban stormwater runoff. In this study, the Dynamic Urban Water Simulation Model (DUWSiM) is applied to Dublin, Ireland, to explore urban runoff patterns under varying urban growth and climate scenarios. Results show that annual urban runoff could decrease by 3.0% from climate change and monthly runoff could increase by 30% in winter and decrease by 28% in summer. Results also indicate that urban growth could increase annual runoff by up to 15%. The combined effect of climatic and land-use change generated runoff may potentially increase annual totals from between 2.9% to 21%. Monthly changes in runoff totals could increase by up to 57%. Accommodating these variations in runoff between the scenarios, flexible decentralised systems such as green roofs and pervious pavements, have a vital role in increasing the adaptability and long term sustainability of water infrastructure.