This dissertation tests the proposition that the spatial structure of street networks affects the distribution of urban land use. Specifically, it examines patterns of commercial land use utilizing parcel based data on retail and service businesses location. While previous studies report a correlation between spatial structure and patterns of commercial land use, these studies do not typically control for the effect of key variables likely to contribute to the spatial distribution of retail and service establishments. In order to redress this balance, and using the City of Buenos Aires as a case study, this dissertation studies the correlation between commercial land use frontage and street connectivity measures, while controlling for street widths, density of population and employment, interstore externalities, zoning regulations, and distance to transit stations. Buenos Aires is chosen for its regular plan radiating from a well-defined CBD, a plan which would be expected to conform to standard urban attraction models of retail location. Results of multiple regression models indicate that, after controlling for these variables, measures of street connectivity account for key aspects of the distribution of retail, including linear distributions along major radial and peripheral streets at a distance from the CBD. Thus, the dissertation supports the thesis that "urban attraction" should not be conceptualized in terms of distances from a unique central location, or a number of central locations, but rather in terms of a model of distributed centrality governed by the structure of street networks.

Freight deliveries on signalized urban streets are known to cause lane blockages during delivery. Traffic congestion associated with urban freight deliveries has gained increasing attention recently as traffic engineers and planners are tasked with finding solutions to manage increasing demand more sustainably with limited road capacity. The goal of this research is to evaluate two models for quantifying the capacity and signalized control delay effects of a lane-blocking freight delivery on an urban arterial. The two methods are: an All-or-Nothing model similar to methodology used in the Highway Capacity Manual 6th Edition, and a Detailed model consistent with kinematic wave theory. The purpose is to provide insight on the use of these tools for analysis of urban freight delivery. The signalized control delay results of the two models are compared with observed video data of urban deliveries from one city block of 8th Ave in New York City. Empirical confirmation of double-parked delivery impact on signalized controlled delay remains elusive due to an inability to isolate the effects of the deliveries from other traffic perturbations in the video sample. Instead, microscopic simulation using Aimsun is used for comparison to the theoretical models and the results lend credibility to the Detailed model. The simulation results show a similar trend of delay impact from double-parked deliveries located at a range distances from the intersection and more closely resembled the Detailed model. The All-or-Nothing model would provide only a coarse representation of the capacity and delay effects. The more detailed approach that accounts for the dynamics of queuing in front of the delivery vehicle provides closed form analytical formulas for capacity and signalized control delay that can account for varying locations of deliveries as well as analysis periods with some blocked cycles and others unblocked. Two policy implications are proposed: 1) that double-parked deliveries located mid-block likely result in less signalized control delay impact, and 2) freight receivers that attract double-parked deliveries near an intersection stop line should be prioritized in urban freight delivery mitigation policies such as off-hour delivery.

Various researches across the world have established that graffiti writing is a universal social practice. The actual occurrence or manifestation of graffiti is however far from being universal cross-culturally. It varies based on a wide array of social variables. This research therefore set out to interrogate the occurrence of graffiti writing as a unique social practice in Zimbabwean urban areas. Three Zimbabwean urban areas (Harare, Chitungwiza and Gweru) were specifically sampled for the collection of graffiti inscriptions on various surfaces which included toilet walls, durawalls as well as road signs. Graffiti data collected from the various surfaces was complemented by reader feedback contributions from The Herald and Newsday. Focus group discussions provided a third tier of data aimed at establishing participants’ multiple reactions towards the practice of graffiti. Analysis of data was done based on three significant sections of participants’ attitudes towards graffiti, urban street protest graffiti as well as educational graffiti collected from various toilet surfaces in urban areas. Participants’ attitudes towards graffiti revealed varied reactions towards the practice of graffiti. The reactions were partly influenced by the participants’ ages as well as levels of education and maturity. Age and maturity proved to be predictors of the extent to which participants were willing to be pragmatic in so far as the appreciation of graffiti writing is concerned. Older and more experienced and mature participants were thus willing to look past the ‘deviant’ nature of graffiti writing to consider the various pressures that force writers to take to the wall. Urban street protest graffiti is a term coined in this research to capture the unique type of graffiti that is written on various surfaces along streets in urban areas. This highly textual graffiti is drastically different from the post-graffiti commonly found in Western urban cities and is aptly referred to as street art. Urban street protest mainly manifested itself in Zimbabwean urban areas in two main themes of protest inscriptions directed towards the operations of Zimbabwe’s electrical energy supplier (commonly referred to by its former name of the Zimbabwe Electricity Supply Authority - ZESA) as well as through political inscriptions. Political inscriptions expose a high degree of nuances that have not been hitherto discussed in literature on political graffiti inscriptions. The research analysed how graffiti writing can be employed for both pro-hegemonic and anti-hegemonic purposes. Inscriptions in high schools and tertiary institutions highlighted a differential construction of discourse on a gendered basis. Inscriptions in female toilets indicated a tendency of graffiti writers to perpetuate dominant educational, health, traditional and religious discourses which assert male dominance. The inscriptions show a major preoccupation with restricting or policing of female sexuality by fellow students mainly through the discursive usages of social corrective Shona labels such as hure (prostitute) and gaba ([big] tin). These are labels that are virtually absent in graffiti inscriptions in male toilets which is suggestive of a situation whereby female inscriptions are conservative. A consequence of such conservatism in inscriptions in female toilets is that no new sexualities are reconstructed and negotiated through discourses in discursive spaces provided by the inherently private nature of toilets in general. Thus, cultural and religious normative expectations are regarded as still weighing heavily on female high school writers in the construction and negotiation of sexuality and gendered behaviours, attitudes, norms and values through discourses constructed through graffiti. In contrast, male inscriptions highlight a major subversion of dominant discourses on abstinence and responsible sexual behaviours and attitudes. Corrective social labels such as ngochani (gay person) are mainly employed to pressure males into indulging and engaging in heterosexual behaviours. Discourses constructed through graffiti inscriptions in male toilets also demonstrate how sexuality is constructed through debate on the appropriateness of marginalised sexualities such as masturbation and homosexuality. / African Languages / D. Litt. et Phil. (African Languages)

都市地區因人口增長、大量人工建成環境與能源使用等緣故，將產生都市熱島效應。都市熱島效應產生都市高溫化，進而衍生各種都市環境問題，如都市微氣候改變、能源消耗與供給壓力增加、空氣汙染物不易擴散等(Landsberg, 1981)。臺灣位於亞熱帶氣候地區，人口多集中於都市地區，尤其是臺北市。先前相關研究指出臺北市具有都市熱島效應。本研究從有高蓄熱特性的道路與建築量體所構成之「都市街道」為尺度範圍，將進行固定監測站之量測，實際取得都市微氣候之數據（溫度與熱舒適性指標），配合都市街道熱環境因子之調查，一併探討都市街道熱環境因子產生都市高溫化的關係，有別於其他研究探討都市整體的熱島效應，或是單一影響因素導致的都市高溫化，如街廓、材料、植栽、人工排熱等對微氣候的影響。此外，本研究輔以計算流體力學（Computational Fluid Dynamics，簡稱CFD），將量測的數據做為模擬之基本條件，進而模擬都市街道的風場與溫度場，搭配實測數據與模擬值作分析，並且加入都市街道熱環境因子與兩者作探討。研究成果指出植栽綠化與遮蔭將有效改善都市高溫化現象。

A influência benéfica de áreas verdes no conforto humano em áreas urbanas tem sido reconhecida por estudos de diferentes campos do conhecimento. Áreas verdes e arborização bem planejada constituem importantes recursos para melhorar a qualidade do ambiente ao promover bem-estar físico e mental aos seus usuários. Avaliar o grau de interferência proporcionado pela arborização no conforto térmico e bem-estar da população foi o objetivo principal do presente estudo. O índice de floresta urbana (IFU) avaliou a interferência da quantidade de cobertura arbórea em quatro áreas da cidade de Campinas/SP/Brasil em relação às condições de conforto térmico. Para tanto, foram utilizados índices de avaliação de conforto térmico (PMV Predicted Mean Vote e PET- Physiologically Equivalent Temperature) obtidos por meio do modelo Ray Man Pro.Questionários aplicados aos usuários das áreas de estudo possibilitaram verificar se os resultados obtidos por meio dos índices PMV e PET correspondiam à real sensação de conforto térmico relatada pelos entrevistados.Simulações com o uso do programa ENVI-met v. 3.1 foram realizadas a fim de observar as interferências microclimáticas causadas pela inserção de vegetação no meio urbano. A percepção do usuário das áreas de estudo em relação à arborização urbana também foi identificada por meio de questionários. Essa pesquisa permitirá no futuro, a partir dos resultados levantados, construir um instrumento para ser incorporado no plano diretor de arborização urbana, possibilitando urbanistas e profissionais, que atuam de forma direta ou indireta no planejamento das cidades, inspecionar e analisar o conforto térmico e a qualidade de vida no meio urbano, tendo em vista a valorização e adequação da arborização viária em seus projetos. / The benefits of green urban area on human comfort have been recognized by studies performed in different knowledge fields. Green areas and urban forest planning are important tool to improve the quality of the urban environment by promoting physical and mental wellbeing to its users. The main goal of the present study is to assess the interference promoted by green areas in the welfare and thermal comfort of the urban population. The Urban Forest Index (IFU) evaluated the interference of the amount of trees in four areas of the city of Campinas, in the state of São Paulo, Brazil in relation to the conditions for thermal comfort. For this purpose, comfort indices have been used for evaluating thermal comfort (PMV-Predicted Mean Vote and PET-Physiologically Equivalent Temperature), obtained by the RayMan model. Questionnaires applied to the users on these study areas aimed to verify if the results of PET and PMV indices corresponded to the thermal sensation by respondents. Simulations using the ENVI-met program v 3.1 were conducted to observe the interference on microclimate due to the presence of vegetation in the urban environment. Questionnaires were also used to assess the perception of users on urban street trees. In the future, results obtained in this study will allow the building of an instrument, which could be included in the urban forest master plan. As a result, urban planners and other professionals who work directly or indirectly in the planning of cities will be able to inspect and evaluate the thermal comfort and the welfare of their citizens, considering the recovery and suitability of urban street trees in their projects.

A influência benéfica de áreas verdes no conforto humano em áreas urbanas tem sido reconhecida por estudos de diferentes campos do conhecimento. Áreas verdes e arborização bem planejada constituem importantes recursos para melhorar a qualidade do ambiente ao promover bem-estar físico e mental aos seus usuários. Avaliar o grau de interferência proporcionado pela arborização no conforto térmico e bem-estar da população foi o objetivo principal do presente estudo. O índice de floresta urbana (IFU) avaliou a interferência da quantidade de cobertura arbórea em quatro áreas da cidade de Campinas/SP/Brasil em relação às condições de conforto térmico. Para tanto, foram utilizados índices de avaliação de conforto térmico (PMV Predicted Mean Vote e PET- Physiologically Equivalent Temperature) obtidos por meio do modelo Ray Man Pro.Questionários aplicados aos usuários das áreas de estudo possibilitaram verificar se os resultados obtidos por meio dos índices PMV e PET correspondiam à real sensação de conforto térmico relatada pelos entrevistados.Simulações com o uso do programa ENVI-met v. 3.1 foram realizadas a fim de observar as interferências microclimáticas causadas pela inserção de vegetação no meio urbano. A percepção do usuário das áreas de estudo em relação à arborização urbana também foi identificada por meio de questionários. Essa pesquisa permitirá no futuro, a partir dos resultados levantados, construir um instrumento para ser incorporado no plano diretor de arborização urbana, possibilitando urbanistas e profissionais, que atuam de forma direta ou indireta no planejamento das cidades, inspecionar e analisar o conforto térmico e a qualidade de vida no meio urbano, tendo em vista a valorização e adequação da arborização viária em seus projetos. / The benefits of green urban area on human comfort have been recognized by studies performed in different knowledge fields. Green areas and urban forest planning are important tool to improve the quality of the urban environment by promoting physical and mental wellbeing to its users. The main goal of the present study is to assess the interference promoted by green areas in the welfare and thermal comfort of the urban population. The Urban Forest Index (IFU) evaluated the interference of the amount of trees in four areas of the city of Campinas, in the state of São Paulo, Brazil in relation to the conditions for thermal comfort. For this purpose, comfort indices have been used for evaluating thermal comfort (PMV-Predicted Mean Vote and PET-Physiologically Equivalent Temperature), obtained by the RayMan model. Questionnaires applied to the users on these study areas aimed to verify if the results of PET and PMV indices corresponded to the thermal sensation by respondents. Simulations using the ENVI-met program v 3.1 were conducted to observe the interference on microclimate due to the presence of vegetation in the urban environment. Questionnaires were also used to assess the perception of users on urban street trees. In the future, results obtained in this study will allow the building of an instrument, which could be included in the urban forest master plan. As a result, urban planners and other professionals who work directly or indirectly in the planning of cities will be able to inspect and evaluate the thermal comfort and the welfare of their citizens, considering the recovery and suitability of urban street trees in their projects.

Submitted by SBI Biblioteca Digital (sbi.bibliotecadigital@puc-campinas.edu.br) on 2017-03-23T13:25:54Z No. of bitstreams: 1 L?GIA PARREIRA MUNIZ G?AL.pdf: 5270981 bytes, checksum: 96b0646b01e474b8307ad43548bce884 (MD5) / Made available in DSpace on 2017-03-23T13:25:54Z (GMT). No. of bitstreams: 1 L?GIA PARREIRA MUNIZ G?AL.pdf: 5270981 bytes, checksum: 96b0646b01e474b8307ad43548bce884 (MD5) Previous issue date: 2017-02-07 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The formation of cities has shaped the urban street canyons, defined by the street and the buildings that extend along its sides. The land use and occupation are agents that modify the climate, however this is rarely considered in the urban planning of cities. Aspects like height and width ratio, sky view factor, albedo of the surface materials and the presence of vegetation in the canyon have been widely studied in association with the local climatic behavior. Understanding the influence of these parameters on the microclimate of urban street canyons is indispensable to achieve sustainability between urban occupation and thermal comfort. Therefore, the objective of this thesis is to investigate the interference of land use and occupation legislation and urban geometry in the microclimate of an urban street canyon in Campinas/ SP. The methodology used involves the climatic monitoring of the study area in Cambu? (neighborhood), the urban and climatic characterization of three points with different land use and occupation configurations and the selection of the canyon used for simulation scenarios. These scenarios involve two main aspects: the local urban legislation and the canyon geometry (height width ratio - H/W and length height ratio - L/H). The simulations were performed using the microclimatic simulation model ENVI-met 4.0 preview. Scenarios in agreement with the local legislation showed that, in winter, only 25% of day perceived discomfort to heat. In the other hand, in the summer period, a comfortable feeling was perceived in only 25% of the day, providing discomfort to the heat for the rest of the day. In the scenarios varying the urban geometry it was verified that, for scenarios with the same H/W ratio, the PET (Physiological Equivalent Temperature) value did not suffer significant alteration. However, when the L/H ratio was fixed and the H/W ratio varied, we noted that deeper canyons led to lower PET peaks. The scenario A, for example, with a lower H/W ratio (0.5) and lower L/H (3) ratio, showed PET peak 7.3?C higher than the scenario I with a higher H/W ratio (2.0) and higher L/H ratio (7). The results showed that there is a strong correlation between the H/W ratio and the thermal comfort of the urban street canyons: deeper canyons yield lower PET values. Moreover, it was verified that the climatic conditions of the canyon are independent of their length (L/H ratio) and that canyons oriented in the prevailing wind direction (SE) reached lower PET values. Finally, it was evidenced that shading and wind speed are fundamental in determining comfort in urban street canyons. / A forma??o das cidades tem configurado os chamados c?nions urbanos, definidos pela interface composta pela via e as edifica??es que se estendem em suas laterais. O uso e ocupa??o do solo s?o agentes modificadores do clima e, no entanto, este ?ltimo tem sido pouco levado em considera??o no planejamento urbano dos munic?pios. Entretanto, aspectos como a rela??o altura e largura do c?nion, o fator de vis?o do c?u, o albedo dos materiais de superf?cie e a presen?a de vegeta??o no c?nion t?m sido amplamente estudados em associa??o com o comportamento clim?tico local. Neste contexto, entender a influ?ncia desses par?metros no microclima de c?nions urbanos ? de fundamental import?ncia para se atingir a sustentabilidade entre ocupa??o urbana e conforto t?rmico. Em vista disso, o objetivo deste trabalho ? analisar a interfer?ncia da legisla??o de uso e ocupa??o do solo e da geometria urbana no microclima de um c?nion urbano da cidade de Campinas/ SP. Para isso foi utilizada uma metodologia que envolve o monitoramento clim?tico do recorte de estudo selecionado no bairro Cambu?, a caracteriza??o urbana e clim?tica de tr?s pontos com diferentes configura??es de uso e ocupa??o do solo e a escolha do c?nion de interesse para simula??o de cen?rios que envolvem dois aspectos principais: a legisla??o urban?stica local e a geometria do c?nion (rela??o altura largura ? H/W e rela??o comprimento altura ? L/H). As simula??es foram realizadas com o modelo de simula??o microclim?tica ENVI-met 4.0 preview. Nos cen?rios respeitando a legisla??o o desconforto para o calor foi observado em apenas 25% do dia no per?odo de inverno; j? no per?odo de ver?o a sensa??o de conforto foi obtida em apenas 25% do dia, sendo observado desconforto para o calor no restante do dia. Nos cen?rios variando a geometria urbana verificou-se que, para cen?rios de mesma rela??o H/W, o valor do PET (Physiological Equivalent Temperature) n?o sofreu altera??o significativa. J? quando se fixou a rela??o L/H e variou-se a rela??o H/W, ficou claro que c?nions mais profundos levaram a picos de PET mais baixos. O cen?rio A, por exemplo, de menor rela??o H/W (0,5) e menor rela??o L/H (3), apresentou pico de PET 7,3?C mais alto que o cen?rio I, de maior rela??o H/W (2,0) e maior rela??o L/H (7). Os resultados mostraram que existe forte correla??o entre a rela??o H/W e o conforto t?rmico dos c?nions urbanos: quanto mais profundo, menores os valores de pico do ?ndice PET. Al?m disso, verificou-se que c?nions orientados na dire??o predominante dos ventos alcan?aram valores de PET mais baixos. Por fim, foi evidenciado que o sombreamento da superf?cie e a intensidade da velocidade do vento s?o fundamentais na determina??o do conforto t?rmico em c?nions urbanos.

Various researches across the world have established that graffiti writing is a universal social practice. The actual occurrence or manifestation of graffiti is however far from being universal cross-culturally. It varies based on a wide array of social variables. This research therefore set out to interrogate the occurrence of graffiti writing as a unique social practice in Zimbabwean urban areas. Three Zimbabwean urban areas (Harare, Chitungwiza and Gweru) were specifically sampled for the collection of graffiti inscriptions on various surfaces which included toilet walls, durawalls as well as road signs. Graffiti data collected from the various surfaces was complemented by reader feedback contributions from The Herald and Newsday. Focus group discussions provided a third tier of data aimed at establishing participants’ multiple reactions towards the practice of graffiti. Analysis of data was done based on three significant sections of participants’ attitudes towards graffiti, urban street protest graffiti as well as educational graffiti collected from various toilet surfaces in urban areas. Participants’ attitudes towards graffiti revealed varied reactions towards the practice of graffiti. The reactions were partly influenced by the participants’ ages as well as levels of education and maturity. Age and maturity proved to be predictors of the extent to which participants were willing to be pragmatic in so far as the appreciation of graffiti writing is concerned. Older and more experienced and mature participants were thus willing to look past the ‘deviant’ nature of graffiti writing to consider the various pressures that force writers to take to the wall. Urban street protest graffiti is a term coined in this research to capture the unique type of graffiti that is written on various surfaces along streets in urban areas. This highly textual graffiti is drastically different from the post-graffiti commonly found in Western urban cities and is aptly referred to as street art. Urban street protest mainly manifested itself in Zimbabwean urban areas in two main themes of protest inscriptions directed towards the operations of Zimbabwe’s electrical energy supplier (commonly referred to by its former name of the Zimbabwe Electricity Supply Authority - ZESA) as well as through political inscriptions. Political inscriptions expose a high degree of nuances that have not been hitherto discussed in literature on political graffiti inscriptions. The research analysed how graffiti writing can be employed for both pro-hegemonic and anti-hegemonic purposes. Inscriptions in high schools and tertiary institutions highlighted a differential construction of discourse on a gendered basis. Inscriptions in female toilets indicated a tendency of graffiti writers to perpetuate dominant educational, health, traditional and religious discourses which assert male dominance. The inscriptions show a major preoccupation with restricting or policing of female sexuality by fellow students mainly through the discursive usages of social corrective Shona labels such as hure (prostitute) and gaba ([big] tin). These are labels that are virtually absent in graffiti inscriptions in male toilets which is suggestive of a situation whereby female inscriptions are conservative. A consequence of such conservatism in inscriptions in female toilets is that no new sexualities are reconstructed and negotiated through discourses in discursive spaces provided by the inherently private nature of toilets in general. Thus, cultural and religious normative expectations are regarded as still weighing heavily on female high school writers in the construction and negotiation of sexuality and gendered behaviours, attitudes, norms and values through discourses constructed through graffiti. In contrast, male inscriptions highlight a major subversion of dominant discourses on abstinence and responsible sexual behaviours and attitudes. Corrective social labels such as ngochani (gay person) are mainly employed to pressure males into indulging and engaging in heterosexual behaviours. Discourses constructed through graffiti inscriptions in male toilets also demonstrate how sexuality is constructed through debate on the appropriateness of marginalised sexualities such as masturbation and homosexuality. / African Languages / D. Litt. et Phil. (African Languages)