Filtering by
- All Subjects: Communication
- All Subjects: Sustainability
- Creators: de la Garza, Sarah Amira
- Member of: ASU Electronic Theses and Dissertations
In recent years, an increase of environmental temperature in urban areas has raised many concerns. These areas are subjected to higher temperature compared to the rural surrounding areas. Modification of land surface and the use of materials such as concrete and/or asphalt are the main factors influencing the surface energy balance and therefore the environmental temperature in the urban areas. Engineered materials have relatively higher solar energy absorption and tend to trap a relatively higher incoming solar radiation. They also possess a higher heat storage capacity that allows them to retain heat during the day and then slowly release it back into the atmosphere as the sun goes down. This phenomenon is known as the Urban Heat Island (UHI) effect and causes an increase in the urban air temperature. Many researchers believe that albedo is the key pavement affecting the urban heat island. However, this research has shown that the problem is more complex and that solar reflectivity may not be the only important factor to evaluate the ability of a pavement to mitigate UHI. The main objective of this study was to analyze and research the influence of pavement materials on the near surface air temperature. In order to accomplish this effort, test sections consisting of Hot Mix Asphalt (HMA), Porous Hot Mix asphalt (PHMA), Portland Cement Concrete (PCC), Pervious Portland Cement Concrete (PPCC), artificial turf, and landscape gravels were constructed in the Phoenix, Arizona area. Air temperature, albedo, wind speed, solar radiation, and wind direction were recorded, analyzed and compared above each pavement material type. The results showed that there was no significant difference in the air temperature at 3-feet and above, regardless of the type of the pavement. Near surface pavement temperatures were also measured and modeled. The results indicated that for the UHI analysis, it is important to consider the interaction between pavement structure, material properties, and environmental factors. Overall, this study demonstrated the complexity of evaluating pavement structures for UHI mitigation; it provided great insight on the effects of material types and properties on surface temperatures and near surface air temperature.
or phenomena influence the process for constructing self-identity in the performance of everyday life. This concept, refraction, emerged as part of a grounded theory methods analysis of ethnographic fieldwork conducted in Itacaré, Bahia, Brazil from January to July 2014. The work here contributes to the field of performance studies as a possibility for examining how affective responses to difficult experiences contribute to a shift in perspective and subsequently shifts in the performance of self in everyday life. This research was conducted with critical and reflexive autoethnographic methods in order to hold the research accountable for the ways subject position influences the research. In this case the most salient theme that emerged from these autoethnographic methods was an unpacking of unacknowledged tourist privilege in this setting. The resulting work-in-progress
performance will offer ways for spectators to question their own assumptions
regarding tourist privilege in Brazil, and in so-called developing countries in similar
tropical climates. An additional contribution to the field of performance-based research that resulted from this dissertation is the articulation of a dynamic locus of creativity wherein rigorous established qualitative research methods complement creative practices in conjunction with a spectrum of tacit knowledge and theoretical sensitivities. This juncture becomes the theoretical space where creativity in research can be articulated in ways that are legible to both artists and researchers.