Thesis (M.L.A.)--University of Hong Kong, 2005. / Includes special report study entitled: Modular system: review & analysis of outdoor portable structures.

No description available.

Within the context of the contribution that urban infill development makes to urban wholeness, this thesis examines three specific sites in the city of Charlotte, North Carolina. The thesis tests the impact upon these sites of certain environmental design theories and principles developed primarily during the twentieth century. Subsequently, it examines what effect the infilling of these sites has upon the urban wholeness of the surrounding city. / Master of Science

While Jane Jacobs' frontal assault on "modern planning" is now over forty years old, communities around the United States are still struggling to deal with the legacy of modernist interventions that dramatically altered the historic urban form and culture of their downtowns. In the worst cases, whole zones were transformed into nearly unusable space. Reintegrating these lost spaces into the urban fabric is one of the most significant challenges of urban planners and designers today. Despite the ubiquity of lost spaces in American cities, comparatively little research has been done on the specific historic urban forms that were altered. This dissertation seeks to explore the processes of landscape change through a case study of Louis Armstrong's downtown neighborhood in New Orleans. It employs an urban morphological framework to uncover the specific landscape changes that occurred in the neighborhood over time. This micro-level view is broadened through an examination of the political economic forces that helped to transform the once vibrant neighborhood into the lost space of today. This study concludes that while it is tempting to identify the twentieth century modern interventions as the cause of lost space in New Orleans, such a reading unnecessarily isolates the modern development era from the historical continuum of land use that helped define the city. When the scope of inquiry into the causes of lost space is widened to include the historic formation of landscape remnants, long-standing patterns of lost space development begin to appear that stretch back to the founding of the city. Modern development, seen in this light, exacerbated existing negative landscape features more than created them.

This dissertation contains three chapters that examine urban policies. The first chapter considers the impacts of a new card fee for prepaid transit cards in New York City. Since 1998, the New York City Metropolitan Transportation Authority (MTA) system has used prepaid cards (MetroCards) to collect subway and bus fares. In 2013, the MTA imposed a $1 card fee (surcharge) on new MetroCard purchases. Using a novel dataset with transaction-level deposit and card use information, I show that the fee caused riders to put more money on new MetroCard purchases, particularly those in low-income neighborhoods and those who used cash or debit (rather than credit) cards. As a result, the net monthly outstanding balance from transit card deposits increased dramatically, with riders lending an extra $150 million, on an annual basis, to the MTA. Moreover, over $20 million of the increased balances in the first year were never redeemed and escheated to the MTA when these cards expired. The leading explanation highlights the importance of the cost of effort to remember to carry the same card. I pose a structural model to calibrate the effect of a new card fee. Counterfactual simulation predicts that a new card fee of $4.35 will maximize the MTA's profit. These findings have implications for fiscal policy designs and fee structures of prepaid card industry. The second chapter examines the causal effects of local access to alcohol on birth outcomes. After the repeal of National Prohibition in 1933, 30 states gave counties and municipalities the local option to continue alcohol restrictions. Citizens set alcohol control policies in their communities through jurisdiction-wide elections (i.e., local option elections). Currently, 10% of U.S. communities maintain a ban on some or all alcohol sales. Assessing the impact of local access to alcohol on alcohol-related outcomes such as birth weight, drinking under the influence, alcohol-related crimes, and so on is complicated by the potential non-random selection of liquor laws. I examine the causal effects of local access to alcohol on birth outcomes by comparing municipalities where referenda on legalizing liquor sales passed and failed by narrow margins. My results indicate that municipalities which were studied experienced higher incidence of low birth weight after legalizing the local sale of alcohol to the general public. The incidence of low birth weight rose by 4.5% for babies born within two years after the elections. The third chapter measures the deleterious effect of institutional discrimination on health. Interest in the impact of institutional discrimination on health outcomes has increased dramatically. Since research has mostly been done in the western context where social segregation has already been established, it is difficult to isolate the effect of initial social segregation on health outcomes. In this chapter, I examine the causal effect of institutional discrimination on health by exploiting a 1964 change in household registration system (hukou) in China, which caused a nationwide discrimination against rural dwellers. The 1964 change in the hukou system started to put tight control on domestic migration. Thereafter, movement from rural to urban areas became virtually impossible. Following the 1964 change in hukou policy, the fraction of urban hukou residents suddenly fell from over 50% to about 40%. I use this discontinuity in the proportion of urban hukou residents to identify the causal effect of institutional discrimination anchored in the hukou system on health. The regression-discontinuity (RD) design estimates suggest that urban hukou citizens have much better chances of being in good health. The deleterious effect of rural hukou on health possibly works through mechanisms of labor disparity, limited access to healthcare, and deprivation of quality education.

As residential urban development increases in the western United States, few studies have shown how different urban forms influence vegetation cover. The two studies in this thesis examine how to define and measure urban form in order to understand the relationship between urban form characteristics and vegetation cover. In the first study, urban form was defined by using past methods of identifying and measuring urban sprawl. Past studies showed the most essential metrics that define residential urban form are building density, centrality, connectivity, land use mix, and parcel size. This study reviews these metrics and proposes revised unified definitions and measurement methods. It is recommended that consistent definitions and methods be used in further research of urban form. Cache County, Utah was used as a study area to apply these methods as a representative community of the western U.S. Residential parcels were measured for each metric. A K-means cluster analysis assign each parcel to one of 50 groups based on metric measurement similarities. The 10 most widely used groups contained 87% of the residential parcels in Cache County. These groups represented urban forms with distinct identifiable characteristics such as Agricultural residential, urban sprawl, historic plat patterns, and evolved versions each. The second study used the metrics and groups from the first study to check for correlations with vegetation cover. A normalized difference vegetation index ( NDVI) of aerial imagery of Cache County was used to classify land cover into three groups: dense vegetation, light vegetation, and no vegetation. Measurements of vegetation cover were extracted for each parcel and each urban form group. Total vegetation cover ( TVC) and dense vegetation cover (DVC) measured higher in urban areas than in the county as a whole. Agricultural residential groups had among the highest TVC, but had the lowest DVC. Non-agricultural residential groups had the highest DVC as a percentage of TVC with the exception of group 4 “Modern Suburban Sprawl” which had the lowest DVC as a percentage of TVC. Group 7 “Satellite Centers” had the highest TVC while group 3 “Dead End Semi-sprawl” had the lowest TVC. Both groups 3 and 7 had the highest DVC as a percentage of TVC. A correlation analysis revealed that TVC had stronger correlations than DVC with urban form metrics. Building density had the strongest correlation with TVC (r = -0.62, p= 0). Correlations with TVC were also found with Parcel size (r = -0.23, p= <.001) and centrality (r = -0.21, p = <.001). Very weak relationships with TVC w ere found with connectivity and land use mix.

Over the last several decades, low-density development and increasing levels of automobile dependence have become two of the major problems facing many urban areas. While they have significantly improved urbanites' mobility, freedom, and social contacts, and have expanded the ranges of economic activities, they have also brought numerous problems and externalities. Mitigating their negative externalities through appropriate policies necessitates the examination of their relationship and the effect of other urban elements. This research examines the relationship between density and automobile dependence and its underlying factors within cities. It examines the effects of quantifiable factors at three levels of analysis: regional, zonal, and household. Several hypotheses and sub-hypotheses concerning density and automobile dependence relationship and its underlying factors are examined. The research findings confirm most of the study hypotheses. With respect to the strength and direction of the relationship between population density and automobile dependence measured in per capita VMT, most of the models constructed confirm the existence of a strong simultaneous relationship between density and VMT. Further, the analysis shows that other land use, economic, demographic, and transportation factors are also important determinants of density and VMT. At different levels of analysis, different factors are more important in explaining density and automobile dependence than others. Finally, the estimated optimal densities tend to be more than double the existing average densities of the study cases. The research conclusions suggest several theoretical and policy implications to guide future policies in land use and transportation.

The human population is rapidly urbanizing. While this will undoubtedly present challenges for humans it will also place pressure on birds in these areas. To better manage these spaces in a manner that promotes avian biodiversity, we must first come to understand how human development affects the distribution and abundance of bird species and guilds within cities and if patterns observed previously in large cities can be extended to smaller ones. Breeding birds were surveyed along a gradient of increasing urbanization in Iowa City, Iowa, during the summers of 2014 and 2015. Study areas included a forested park, recreational park, low density residential area, medium density residential area, high density/mixed-use area, and urban core. Birds were censused a total of four times at each site using variable circular plot counts. Landscape characteristics were measured using a high resolution land cover dataset and tree canopy model. Regression models were developed to investigate relationships between the bird community and land cover characteristics. Bird species richness, diversity, and evenness all decreased with increasing urbanization, while biomass and the number of individuals peaked in the urban core. The community shifted from non-native, resident, granivorous, multi-brooding building nesters in highly developed areas to native, migrant, invertivorous, single-brooding, tree and tree cavity nesters at the least developed sites. Regression models indicated varied relationships among landscape characteristics and species richness and community prevalence of functional guilds. Native, migratory, invertivorous, tree cavity-nesting, and single-brooding species showed negative relationships to variables measuring the built environment, while non-native, resident, granivorous, building nesting, and multi-brooding species showed positive relationships to these measures. Overall, the response of avian functional guilds to varying levels of urban intensity in Iowa City were remarkably similar to the results of previous studies. This suggests that much of what has been learned previously concerning avian responses to human development can be extended to planning and implementing conservation strategies in smaller cities.

No description available.

Thesis (M.U.D.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 85-87).