No abstract available / Dissertation (MArch (Prof))--University of Pretoria, 2007. / Architecture / unrestricted

Though mandatory to be pursued, improved energy efficiency is not the only target to reach. The quality of energy has to be assessed as well. Most of the overall energy use in residential building is for low temperature heat, i.e. temperatures relatively close to the outdoor conditions. From a thermodynamic point of view, this is a degraded form of energy with low potential to be converted into work. On the other hand energy demand is mostly met with high quality energy, such as electricity and natural gas. There is a mismatch between supply and demand, which is not clearly shown by the sole energy analysis. Target of this thesis is to analyze the energy use in buildings from the point of view of its quality, to provide effective theoretical and calculation tools to investigate this mismatch, to assess its magnitudo and to propose improvements aiming at a more rational use of the energy. The idea behind the quality is clarified with the concept of exergy. The potential for improvement in space heating is shown. In no heating system the overall exergy efficiency is above 20%, with fossil fuels. Using direct electricity heating results in exergy efficiency below 7%. Most of the household appliances processes have low-exergy factors but still are supplied with electricity. This results in poor exergy efficiencies and large exergy losses. Systems are poorly performing because little consideration is explicitly given to energy quality. Policies to lower the energy demand, though vital as first step towards an improved use of energy, should not neglect the exergy content. The problem is then shifted to find suitable supplies. Electricity can be exploited with low exergy losses with high-COP heat pumps. Use of fossil fuels for heating purposes should be avoided. District heating from cogeneration and geothermal proves to be a suitable solution at the building level. The issues connected to its exploitation forces to shift the boundary layers of the analysis from the building level to the community level. A rational use of energy should address the community level. The system boundaries have to be enlarged to a dimension where both the energy conversion and use take place with reduced energy transportation losses. This is a cost-effective way to avoid the waste of the exergy potential of the sources with exergy cascade and to make it possible the integration of with renewable sources. Exergy efficiency of the buildings is a prerequisite for a better of energy in this field. / IEA ECBCS Annex 49: Low Exergy Systems for High Performance Buildings and Communities / ESF Cost C24: Analysis and Design of Innovative Systems for Low-EXergy in the Built Environment: COSTeXergy

Cycling for transport is an increasingly popular mode of travel in Hamilton, Ontario. Between 2011 and 2016, the mode share of cycling grew from 0.6% to 1.2%. As of 2019, 46% of the planned cycling facilities network has been built, which suggests that the city is transitioning to a cycling city. However, less is known about the built environment factors that influence cycling trips or the routes travelled by people who cycle in Hamilton. Drawing on the strengths of quantitative and qualitative methods, this research explores the built environment correlates of cycling and the perceptions of people who regularly cycle. First, a spatial interaction model was developed to test the level of cycling flows against various built environment attributes using trips data from the 2016 Transportation Tomorrow Survey. A novel feature of this analysis is the use of a cycle routing algorithm to infer routes as impedance factors. The most parsimonious model suggests that the shortest-path quietest routes best explain the pattern of travel by bicycle in Hamilton. To build upon these findings, objective built environment attributes were documented along select shortest-path quietest routes using environmental audits. The qualitative phase of the study then explores how well these approximated routes match where cyclists travel in Hamilton, as well as how the built environment more broadly in a growing city is perceived and experienced, by interviewing people who regularly travel by bicycle. The interviews highlight that the built environment is not yet bicycle-oriented and that cycling infrastructure influences mobility and route choice. As a result, people who cycle seek out routes that enable them to minimize interactions with cars, by incorporating quiet streets, and that have enjoyable environments. Policy implications and recommendations specific to these findings are discussed to further support the city of Hamilton’s transition to a more bikeable city. / Thesis / Master of Public Health (MPH)

The Middle Eastern and North African (MENA) region is one of the fastest developing in the world, however, some of its countries are the slowest in implementing sustainable construction practices. One of these countries is Kuwait, which contributes one and a half times more global greenhouse gas emissions per capita than the U.S. The dissertation starts by identifying potential barriers to more sustainable design and construction practices among professionals in Kuwait. The barriers identified are not technological, but behavioral, related to perceptions of risk and awareness. Behavioral science offers potential solutions to address these barriers through a concept called choice architecture. Professionals who design and construct our built environment use decision tools such as rating systems to inform their design decision making. These tools are inherently embedded with choice architecture. More intentional choice architecture among rating systems that align individual preferences and beliefs may increase the pursuit of more environmentally sustainable design solutions. One form of choice architecture is called goal framing, which describes the outcome of a choice as either a positive consequence of engaging in a behavior or a negative consequence of not engaging in a behavior. Goal framing was applied to the Envision rating system for sustainable infrastructure to emphasize how long-term sustainable outcomes align with decision makers immediate project needs, preferences, and values. Engineering professionals from the U.S. and Kuwait were randomly assigned either the original version of Envision or the goal framed version. The results indicate that goal framing the credits about people and finances, not just the impact on the environment, increased participants motivation and encouraged them to set higher goals for sustainable performance, specifically among professionals who hold a pro-social paradigm of the world. These findings have relevance to those who design, use, and mandate the use of rating systems during the design and construction process of buildings and infrastructure. Future research should continue to explore how engineering professionals make decisions and what choice architecture modifications can support design and engineering towards more sustainable outcomes. / Doctor of Philosophy / The Middle Eastern and North African (MENA) region is one of the fastest developing in the world, however, some of its countries are the slowest in implementing sustainable construction practices. One of these countries is Kuwait, which contributes one and a half times more global greenhouse gas emissions per capita than the U.S. The dissertation starts by identifying potential barriers to more sustainable design and construction practices among professionals in Kuwait. The barriers identified are not technological, but behavioral, related to perceptions of risk and awareness. Behavioral science offers potential solutions to address these barriers through a concept called choice architecture. Professionals who design and construct our built environment use decision tools such as rating systems to inform their design decision making. These tools are inherently embedded with choice architecture. More intentional choice architecture among rating systems that align individual preferences and beliefs may increase the pursuit of more environmentally sustainable design solutions. One form of choice architecture is called goal framing, which describes the outcome of a choice as either a positive consequence of engaging in a behavior or a negative consequence of not engaging in a behavior. Goal framing was applied to the Envision rating system for sustainable infrastructure to emphasize how long-term sustainable outcomes align with decision makers immediate project needs, preferences, and values. Engineering professionals from the U.S. and Kuwait were randomly assigned either the original version of Envision or the goal framed version. The results indicate that goal framing the credits about people and finances, not just the impact on the environment, increased participants motivation and encouraged them to set higher goals for sustainable performance, specifically among professionals who hold a pro-social paradigm of the world. These findings have relevance to those who design, use, and mandate the use of rating systems during the design and construction process of buildings and infrastructure.

This Thesis begins with two premises. As architects: I. We assume responsibility for the built environment. II. We should perceive and address change in society. The focus is an exploration into possible solutions to the paradigm of the suburban settlement. 1995 The condition of life in suburbia is currently drifting away from the ever-changing reality of our culture. The strongly infused notion of a private dwelling amidst a green grass setting has been the normative goal of living for most of our society during its evolution, but particularly since WWII. Much of what is built in suburbia today is done through the inertia of habit. The suburbs continue to be built as if families were large and supported by one income; and as if land and energy were boundless. These conditions have led to patterns of growth which are dysfunctional. The vast land areas covered by this type of settlement require ever-expanding roadways, which in turn become less and less practical to those who live there. More time is devoured daily by getting from one place to another, through a landscape of built sameness. The controlled environments people typically live in; the automobile, workplace, and house, diminish the possibilities of insightful experience that are a part of life in either urban or rural settings. Suburbia, as a place between extremes, offers diluted opportunities for a richness in the quality of life. The architecture of the suburban condition needs to make places which allow both social interaction and truer connections to nature. / Master of Architecture

Self-guided tours for museums require authors to define a learning objective, research content, design graphics, and implement inclusive interpretive methods. However, museum education literature does not provide clear, comprehensive direction for these complex projects. By recounting the development of a self-guided tour of Judiciary Square for the National Building Museum in Washington, DC, this thesis assesses the value and limitations of theoretical literature in practice. It introduces additional research methods and approaches to address project components that museum education literature overlooks.

Sustainable Built Environments Senior Capstone Project / Sidewalk fragmentation in Tucson is the result of City Code Ordinance 25-12 that places the responsibility of sidewalk installation and maintenance on property owner. However, with an average household income 27% below the national average and 25% of Tucson residents living below poverty level sidewalk fragmentation has become a pedestrian safety concern. By using Google Earth to measure the percentage of paved, unpaved and not present sidewalks in four historic communities in central Tucson; this study found a directly proportional relationship between the length of time the neighborhood has been listed as a historic community and the percentage of paved sidewalks within the neighborhood.

Sustainable Built Environments Senior Capstone Project / This paper examines Subsurface Drip Irrigation(SDI) as a solution to water conservation in landscape irrigation. This is a problem because of the drought that the southwestern United States is experiencing, and the amount of water that landscapes utilize and which is ultimately wasted due to inefficient practices. Subsurface drip irrigation represents a potential solution due to its high efficiency and water saving ability; however, there are some problems within it as a system. Utilizing a multiple case studies approach, this paper looked at three of the top irrigation companies, Rain Bird, Toro, and Netafim, and examined how they innovated to overcome the problems with SDI. Synthesizing the best and most effective practices from each company, a model for improving SDI was generated.

Sustainable Built Environments Senior Capstone Project / In a society growing towards alternative modes of transportation, this study explores the phase 2 streetcar expansion for the Tucson area. Using case studies and research articles, a criteria of factors were created to best judge three predetermined expansion routes. A case study was then done on these routes to determine which route would be best for the area. In this study, the factors that were looked at and used to rank the three routes included; population density and average annual income of the surrounding area of the route (400 meter buffer), accessibility and connectivity, which includes; bus stops, bike lanes, walkability, traffic counts and possible park & ride development. The last factor used in the case study was proximity to destination, specifically how many ‘big destinations’ (destinations that experience high volumes of people) each route had. The proximity to destination factor also determined how good of a balance each route had with housing, work and amenities/leisure destinations.

Sustainable Built Environments Senior Capstone Project / Increasing demand for new construction has made the building sector responsible for approximately 43 percent of carbon dioxide (CO2) emissions in the United States. Building conservation, an intervention strategy that refurbishes an existing building without compromising its architectural integrity, is a response to the population’s current infatuation with the new and now that has desensitized modern culture to the past, while surfacing one’s responsibilities to future generations. The focus of this study will be on the University of Arizona’s Bear Down Gym. Through a historical and architectural evaluation, this report makes a case for the rehabilitation of Bear Down Gym in respect to the Secretary of Interior’s Standards for Rehabilitation.