Chipata College of Education Digital Library

Items

• Commentary: Alternative Cultures in Planning Research--From Extending Scientific Frontiers to Exploring Enduring Questions
  As the planning academy has grown and evolved, it has developed different ways of doing planning research. People may (a) work at the scientific frontier, (b) investigate issues of practical relevance, (c) reflect on the implications of practice, or (d) try to answer the enduring questions of planning. These are important differences. Different cultures represent varying ideas about what constitutes an important or significant contribution to the field of planning.
• Adolescent Physical Activity and the Built Environment: A Latent Class Analysis Approach
  This study used latent class analysis to classify adolescent home neighborhoods (n=344) according to built environment characteristics, and tested how adolescent physical activity, sedentary behavior, and screen time differ by neighborhood type/class. Four distinct neighborhood classes emerged: (1) low-density retail/transit, low walkability index (WI), further from recreation; (2) high-density retail/transit, high WI, closer to recreation; (3) moderate–high-density retail/transit, moderate WI, further from recreation; and (4) moderate–low-density retail/transit, low WI, closer to recreation. We found no difference in adolescent activity by neighborhood class. These results highlight the difficulty of disentangling the potential effects of the built environment on adolescent physical activity.
• The Relationship of Area-Level Sociodemographic Characteristics, Household Composition and Individual-Level Socioeconomic Status on Walking Behavior Among Adults
  Understanding the contextual factors associated with why adults walk is important for those interested in increasing walking as a mode of transportation and leisure. This paper investigates the relationships between neighborhood-level sociodemographic context, individual level sociodemographic characteristics and walking for leisure and transport. Data from two community-based studies of adults (n = 550) were used to determine the association between the Area Sociodemographic Environment (ASDE), calculated from U.S. Census variables, and individual-level SES as potential correlates of walking behavior. Descriptive statistics, mean comparisons and Pearson’s correlations coefficients were used to assess bivariate relationships. Generalized estimating equations were used to model the relationship between ASDE, as quartiles, and walking behavior. Adjusted models suggest adults engage in more minutes of walking for transportation and less walking for leisure in the most disadvantaged compared to the least disadvantaged neighborhoods but adding individual level demographics and SES eliminated the significant results. However, when models were stratified for free or reduced cost lunch, of those with children who qualified for free or reduced lunch, those who lived in the wealthiest neighborhoods engaged in 10.7 min less of total walking per day compared to those living in the most challenged neighborhoods (p < 0.001). Strategies to increase walking for transportation or leisure need to take account of individual level socioeconomic factors in addition to area-level measures.
• Ornement et Subjectivité, de la Tradition Vitruvienne à L’âge Numérique.
  On parle souvent aujourd'hui d'un « retour de l'ornement » lié à l'avènement d'une architecture numérique volontiers encline à jouer sur les effets de texture et de couleur. Mais l'ornement auquel il est fait allusion n'a pas grand-chose à voir au premier abord avec celui dont parlait la théorie architecturale classique ou encore la tradition beaux-arts. Tandis que l'ornement traditionnel était localisé, l'ornement numérique règne souvent sur des pans entiers de la façade. L'ornement se parait autrefois d'une dimension symbolique affirmée ; la plupart des théoriciens contemporains de l'ornement reconnaissent qu'il ne possède aucune signification. En fait, le seul point commun entre l'ornement d'hier et celui d'aujourd'hui pourrait bien résider dans les liens qu'entretient la question ornementale avec celle de la subjectivité. Ce sont ces liens que voudrait essayer de clarifier la communication proposée.
• Lessons from Mobilization Around Slum Evictions in Tanzania
  Version of Record
• Assessing Ozone-Related Health Impacts under a Changing Climate
  Climate change may increase the frequency and intensity of ozone episodes in future summers in the United States. However, only recently have models become available that can assess the impact of climate change on O3 concentrations and health effects at regional and local scales that are relevant to adaptive planning. We developed and applied an integrated modeling framework to assess potential O3-related health impacts in future decades under a changing climate. The National Aeronautics and Space Administration-Goddard Institute for Space Studies global climate model at 4 degrees x 5 degrees resolution was linked to the Penn State/National Center for Atmospheric Research Mesoscale Model 5 and the Community Multiscale Air Quality atmospheric chemistry model at 36 km horizontal grid resolution to simulate hourly regional meteorology and O3 in five summers of the 2050s decade across the 31-county New York metropolitan region. We assessed changes in O3-related impacts on summer mortality resulting from climate change alone and with climate change superimposed on changes in O3 precursor emissions and population growth. Considering climate change alone, there was a median 4.5% increase in O3-related acute mortality across the 31 counties. Incorporating O3 precursor emission increases along with climate change yielded similar results. When population growth was factored into the projections, absolute impacts increased substantially. Counties with the highest percent increases in projected O3 mortality spread beyond the urban core into less densely populated suburban counties. This modeling framework provides a potentially useful new tool for assessing the health risks of climate change.
• Climate Change, Ambient Ozone, and Health in 50 US Cities
  We investigated how climate change could affect ambient ozone concentrations and the subsequent human health impacts. Hourly concentrations were estimated for 50 eastern US cities for five representative summers each in the 1990s and 2050s, reflecting current and projected future climates, respectively. Estimates of future concentrations were based on the IPCC A2 scenario using global climate, regional climate, and regional air quality models. This work does not explore the effects of future changes in anthropogenic emissions, but isolates the impact of altered climate on ozone and health. The cities’ ozone levels are estimated to increase under predicted future climatic conditions, with the largest increases in cities with present-day high pollution. On average across the 50 cities, the summertime daily 1-h maximum increased 4.8 ppb, with the largest increase at 9.6 ppb. The average number of days/summer exceeding the 8-h regulatory standard increased 68%. Elevated ozone levels correspond to approximately a 0.11% to 0.27% increase in daily total mortality. While actual future ozone concentrations depend on climate and other influences such as changes in emissions of anthropogenic precursors, the results presented here indicate that with other factors constant, climate change could detrimentally affect air quality and thereby harm human health.
• Links between the Built Environment, Climate and Population Health: Interdisciplinary Environmental Change Research in New York City
  Global climate change is expected to pose increasing challenges for cities in the following decades, placing greater stress and impacts on multiple social and biophysical systems, including population health, coastal development, urban infrastructure, energy demand, and water supplies. Simultaneously, a strong global trend towards urbanisation of poverty exists, with increased challenges for urban populations and local governance to protect and sustain the well-being of growing cities. In the context of these 2 overarching trends, interdisciplinary research at the city scale is prioritised for understanding the social impacts of climate change and variability and for the evaluation of strategies in the built environment that might serve as adaptive responses to climate change. This article discusses 2 recent initiatives of The Earth Institute at Columbia University (EI) as examples of research that integrates the methods and objectives of several disciplines, including environmental health science and urban planning, to understand the potential public health impacts of global climate change and mitigative measures for the more localised effects of the urban heat island in the New York City metropolitan region. These efforts embody 2 distinct research approaches. The New York Climate & Health Project created a new integrated modeling system to assess the public health impacts of climate and land use change in the metropolitan region. The Cool City Project aims for more applied policy-oriented research that incorporates the local knowledge of community residents to understand the costs and benefits of interventions in the built environment that might serve to mitigate the harmful impacts of climate change and variability, and protect urban populations from health stressors associated with summertime heat. Both types of research are potentially useful for understanding the impacts of environmental change at the urban scale, the policies needed to address these challenges, and to train scholars capable of collaborative approaches across the social and biophysical sciences.
• Climate Information for Improved Planning and Management of Mega Cities (Needs Perspective)
  The majority of the population of the planet (6.6 billion) now live in urban areas, which have distinct impacts upon climate at scales from the local to the global. This urban effect is due to the physical form of the city (its three-dimensional geometry and material composition) and its functions (the day-to-day activity patterns that generate emissions of waste heat and materials into the overlying air). While a substantial body of knowledge on the science of urban climates has been developed over the past fifty years, there is little evidence that this knowledge is incorporated into urban planning and design practice. This paper focuses on this gap by examining the nature of urban climate expertise and the needs of those that make decisions about urban areas. In conclusion it makes recommendations to maintain and enhance urban observations and data; to improve understanding of local, regional and global climate linkages; to develop tools for practical planning; and to disseminate urban climate knowledge and its relevance to urban planning to both practicing meteorologists and urban decision makers.
• Do Adolescents Who Live or Go to School Near Fast-Food Restaurants Eat More Frequently from Fast-Food Restaurants?
  This population-based study examined whether residential or school neighborhood access to fast food restaurants is related to adolescents' eating frequency of fast food. A classroom-based survey of racially/ethnically diverse adolescents (n=2724) in 20 secondary schools in Minneapolis/St. Paul, Minnesota was used to assess eating frequency at five types of fast food restaurants. Black, Hispanic, and Native American adolescents lived near more fast food restaurants than white and Asian adolescents and also ate at fast food restaurants more often. After controlling for individual-level socio-demographics, adolescent males living near high numbers fast food restaurants ate more frequently from these venues compared to their peers.
• Urban Heat Island Mitigation Can Improve New York City's Environment: Research on the Impacts of Mitigation Strategies on the Urban Environment
  Version of Record
• Long-Term Threats to Canada's James Bay from Hydro-Electrical Development
  Version of Record
• Sensitivity of Present and Future Surface Temperatures to Precipitation Characteristics
  A model simulation study shows that different diurnal cycles of precipitation are consistent with radically different present and future climate characteristics. In projected future climate scenarios, divergence in the time of day and type of precipitation had very divergent impacts on the radiation balance and consequently on surface temperatures. The relationship between the diurnal cycle of precipitation versus the present and future climate was examined using the GISS-MM5 (Goddard Institute for Space Studies Mesoscale Model 5) regional climate modeling system with 2 alternative moist convection schemes. June-August (JJA) mean surface temperatures of the 1990s, 2050s, and 2080s were simulated over the eastern US on a double nested 108/36 km domain, with the 36 km domain centered over the eastern US. In the 1990s, one model version simulated maxima in (convective) precipitation during the early morning, while the second model simulated the hour of precipitation maxima with considerable spatial variability (in better agreement with observations). In the futuristic climate scenarios, differences in the time of day of precipitation had very important impacts on the radiation balance at the surface. One version gave more precipitation at night and fewer clouds during the day, promoting higher surface temperatures. The alternative version created more precipitation during the day, consistent with diminished absorption of solar radiation at the surface and consequently lower surface temperatures. The results demonstrate the importance of improving cumulus parameterizations in regional mesoscale and global climate models and suggest that such improvements would lead to greater confidence in model projections of climate change.
• Simulating Changes in Regional Air Pollution over the Eastern United States Due to Changes in Global and Regional Climate and Emissions
  [1] To simulate ozone (O3) air quality in future decades over the eastern United States, a modeling system consisting of the NASA Goddard Institute for Space Studies Atmosphere-Ocean Global Climate Model, the Pennsylvania State University/National Center for Atmospheric Research mesoscale regional climate model (MM5), and the Community Multiscale Air Quality model has been applied. Estimates of future emissions of greenhouse gases and ozone precursors are based on the A2 scenario developed by the Intergovernmental Panel on Climate Change (IPCC), one of the scenarios with the highest growth of CO2 among all IPCC scenarios. Simulation results for five summers in the 2020s, 2050s, and 2080s indicate that summertime average daily maximum 8-hour O3 concentrations increase by 2.7, 4.2, and 5.0 ppb, respectively, as a result of regional climate change alone with respect to five summers in the 1990s. Through additional sensitivity simulations for the five summers in the 2050s the relative impact of changes in regional climate, anthropogenic emissions within the modeling domain, and changed boundary conditions approximating possible changes of global atmospheric composition was investigated. Changed boundary conditions are found to be the largest contributor to changes in predicted summertime average daily maximum 8-hour O3 concentrations (5.0 ppb), followed by the effects of regional climate change (4.2 ppb) and the effects of increased anthropogenic emissions (1.3 ppb). However, when changes in the fourth highest summertime 8-hour O3 concentration are considered, changes in regional climate are the most important contributor to simulated concentration changes (7.6 ppb), followed by the effect of increased anthropogenic emissions (3.9 ppb) and increased boundary conditions (2.8 ppb). Thus, while previous studies have pointed out the potentially important contribution of growing global emissions and intercontinental transport to O3 air quality in the United States for future decades, the results presented here imply that it may be equally important to consider the effects of a changing climate when planning for the future attainment of regional-scale air quality standards such as the U.S. national ambient air quality standard that is based on the fourth highest annual daily maximum 8-hour O3 concentration.
• Defining Suburbs
  There is no consensus as to what exactly constitutes a suburb. This article examines the range of suburban definitions in terms of their structure and the topical issues that they grapple with. Suburbs have been defined according to many different dimensions from location and transportation modes to culture and physical appearance. Given this confusion, one approach is to abandon the term; another is to use it with greater precision. This is more than just an issue of semantics. Rather how people talk and think about suburbs shapes how they can see such areas being developed and redeveloped in the future.
• Confronting Urban Displacement: Social Movement Participation and Post-Eviction Resettlement Success in Dar es Salaam, Tanzania
  This article investigates whether urban social movement participation influences post-eviction resettlement success. Pre- and post-eviction interviews were conducted with sixty-four slum dwellers from Dar es Salaam, Tanzania, including members of the Tanzania Federation of the Urban Poor (TFUP). The majority of interviewees reported improved post-eviction housing but adverse employment impacts. TFUP membership was negatively associated with employment outcomes, particularly for property owners. Expecting TFUP to secure housing for them, members delayed finding accommodation. This led to resettlement farther from their former homes and negatively affected employment. Women were especially vulnerable following eviction, with their post-eviction pay falling because of the nature and location of their pre-eviction work.
• Motivations for Slum Dweller Social Movement Participation in Urban Africa: A Study of Mobilization in Kurasini, Dar es Salaam
  This paper examines what motivates the participation of African slum(1) dwellers in urban social movement activities. This issue is analyzed through a case study of grassroots mobilization around evictions in Kurasini ward, Dar es Salaam, Tanzania. The paper uses an analytic narrative approach to account for patterns in participatory behaviour, drawing on both quantitative and qualitative data gathered through interviews with 81 slum dwellers. The study shows that, contrary to the expectations of movement leaders, property owners were significantly more likely than renters to participate in a risky and time-consuming mobilization effort. The study identifies three factors that favoured owner participation: the nature of expected payoffs from participation; greater belief in their efficacy of action; and greater connection to place.
• Integrated Environmental Design and Robotic Fabrication Workflow for Ceramic Shading Systems
  The current design practice for high performance, custom facade systems disconnects the initial façade design from the fabrication phase. The early design phases typically involve a series of iterative tests during which the environmental performance of different design variants is verified through simulations or physical measurements. After completing the environmental design, construction and fabrication constraints are incorporated. Time, budget constraints, and workflow incompatibilities are common obstacles that prevent design teams from verifying, through environmental analysis, that the final design still ‘works’. This paper presents an integrated environmental design and digital fabrication workflow for a custom ceramic shading system. Using the CAD environment Rhinoceros as a shared platform the process allows the design team to rapidly migrate between the environmental and the fabrication models. The recently developed DIVA plug-in for Rhinoceros allows for a seamless performance assessment of the facade in terms of daylight. Glare and annual energy use are addressed through connections to Radiance, Daysim and EnergyPlus simulations. A custom Grasshopper component and additional Rhino scripts were developed to link the environmentally optimized CAD file via Rapid code to a novel ceramic production process based on a 6-axis industrial robot. The resulting environmental design-to- manufacturing process was tested during the generation of a prototypical high performance ceramic shading system.
• "Continuity, complexity and emergence: what is real for digital designers?"
  Author's Original
• Construction history: between technological and cultural history.
  Author's Original
• Architecture and public space: between reassurance and threat.
  Author's Original
• Nature et ingeniérie: Le parc des Buttes-Chaumont"
  Author's Original
• Engineers and engineering history: problems and perspectives.
  Author's Original
• French engineers and social thought, 18–20th centuries: An archeology of technocratic ideals.
  During the second half of the twentieth century, at the time of the foundation of the Fifth Republic, French engineers endorsed enthusiastically technocratic ideals. Their attitude was not only the product of a specific context. It was rooted in a long tradition of connection between French engineering and social preoccupations. This connection emerged at the time of the creation of the first corps of State engineers in the seventeenth and eighteenth centuries. Indeed, State engineers were from the start convinced that they had a social mission. Subsequent episodes, like the Saint-Simonian reflections on the eve of industrialization, or the discussions held in the think tank X-Crise in the aftermath of the 1929 economic crisis contributed also to shape the engineers' sensitivity to social issues. Dwelling on these episodes, but also trying to go beyond their standard assessment, we would like to propose here a more general interpretation of the complex set of relations between French engineering and social thought. In this perspective, the Post-World-War-II French engineers' technocratic concerns come at the end of a long and complex evolution. This case study should enable a better understanding of the more general connivance between engineering culture and technocratic ideals.
• "Learning from utopia: contemporary architecture and the quest for political and social relevance."
  Accepted Manuscript