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- Genre: Masters Thesis
- Creators: Arizona State University
- Member of: ASU Electronic Theses and Dissertations
Description
This thesis addresses the issue of making an economic case for energy storage in power systems. Bulk energy storage has often been suggested for large scale electric power systems in order to levelize load; store energy when it is inexpensive and discharge energy when it is expensive; potentially defer transmission and generation expansion; and provide for generation reserve margins. As renewable energy resource penetration increases, the uncertainty and variability of wind and solar may be alleviated by bulk energy storage technologies. The quadratic programming function in MATLAB is used to simulate an economic dispatch that includes energy storage. A program is created that utilizes quadratic programming to analyze various cases using a 2010 summer peak load from the Arizona transmission system, part of the Western Electricity Coordinating Council (WECC). The MATLAB program is used first to test the Arizona test bed with a low level of energy storage to study how the storage power limit effects several optimization out-puts such as the system wide operating costs. Very high levels of energy storage are then added to see how high level energy storage affects peak shaving, load factor, and other system applications. Finally, various constraint relaxations are made to analyze why the applications tested eventually approach a constant value. This research illustrates the use of energy storage which helps minimize the system wide generator operating cost by "shaving" energy off of the peak demand.
ContributorsRuggiero, John (Author) / Heydt, Gerald T (Thesis advisor) / Datta, Rajib (Committee member) / Karady, George G. (Committee member) / Arizona State University (Publisher)
Created2013
Description
Objectives Through a cross-sectional observational study, this thesis evaluates the relationship between food insecurity and weight status, eating behaviors, the home food environment, meal planning and preparation, and perceived stress as it relates to predominantly Hispanic/Latino parents in Phoenix, Arizona. The purpose of this study was to address gaps in the literature by examining differences in "healthy" and "unhealthy" eating behaviors, foods available in the home, how time and low energy impact meal preparation, and the level of stress between food security groups. Methods Parents, 18 years or older, were recruited during two pre-scheduled health fairs, from English as a second language classes, or from the Women, Infants, and Children's clinic at a local community center, Golden Gate Community Center, in Phoenix, Arizona. An interview, electronic, or paper survey were offered in either Spanish or English to collect data on the variables described above. In addition to the survey, height and weight were collected for all participants to determine BMI and weight status. One hundred and sixty participants were recruited. Multivariate linear and logistic regression models, adjusting for weight status, education, race/ethnicity, income level, and years residing in the U.S., were used to assess the relationship between food security status and weight status, eating behaviors, the home food environment, meal planning and preparation, and perceived stress. Results Results concluded that food insecurity was more prevalent among parents reporting lower income levels compared to higher income levels (p=0.017). In adjusted models, higher perceived cost of fruits (p=0.004) and higher perceived level of stress (p=0.001) were associated with food insecurity. Given that the sample population was predominately women, a post-hoc analysis was completed on women only. In addition to the two significant results noted in the adjusted analyses, the women-only analysis revealed that food insecure mothers reported lower amounts of vegetables served with meals (p=0.019) and higher use of fast-food when tired or running late (p=0.043), compared to food secure mothers. Conclusion Additional studies are needed to further assess differences in stress levels between food insecure parents and food insecure parents, with special consideration for directionality and its relationship to weight status.
ContributorsVillanova, Christina (Author) / Bruening, Meg (Thesis advisor) / Ohri-Vachaspati, Punam (Committee member) / Vega-Lopez, Sonia (Committee member) / Arizona State University (Publisher)
Created2014
Description
Despite the arid climate of Maricopa County, Arizona, vector-borne diseases have presented significant health challenges to the residents and public health professionals of Maricopa County in the past, and will continue to do so in the foreseeable future. Currently, West Nile virus is the only mosquitoes-transmitted disease actively, and natively, transmitted throughout the state of Arizona. In an effort to gain a more complete understanding of the transmission dynamics of West Nile virus this thesis examines human, vector, and environment interactions as they exist within Maricopa County. Through ethnographic and geographic information systems research methods this thesis identifies 1) the individual factors that influence residents' knowledge and behaviors regarding mosquitoes, 2) the individual and regional factors that influence residents' knowledge of mosquito ecology and the spatial distribution of local mosquito populations, and 3) the environmental, demographic, and socioeconomic factors that influence mosquito abundance within Maricopa County. By identifying the factors that influence human-vector and vector-environment interactions, the results of this thesis may influence current and future educational and mosquito control efforts throughout Maricopa County.
ContributorsKunzweiler, Colin (Author) / Boone, Christopher (Thesis advisor) / Wutich, Amber (Committee member) / Brewis-Slade, Alexandra (Committee member) / Arizona State University (Publisher)
Created2013
Description
Biological diversity is threatened by increasing anthropogenic modification of natural environments and increasing demands on natural resources. Sonoran desert tortoises (Gopherus morafkai) currently have Candidate status under the Endangered Species Act (ESA) based on health and habitat threats. To ensure this animal persists in the midst of multiple threats requires an understanding of the life history and ecology of each population. I looked at one physiological and one behavioral aspect of a population of tortoises at the Sugarloaf Mountain (SL) study site in central Arizona, USA. I used 21 years of capture-recapture records to estimate growth parameters of the entire population. I investigated habitat selection of juvenile tortoises by selecting 117 locations of 11 tortoises that had been tracked by radio-telemetry one to three times weekly for two years, selecting locations from both summer active season and during winter hibernation. I compared 22 microhabitat variables of tortoise locations to random SL locations to determine habitat use and availability. Male tortoises at SL reach a greater asymptotic length than females, and males and females appear to grow at the same rate. Juvenile tortoises at the SL site use steep rocky hillsides with high proportions of sand and annual vegetation, few succulents, and enclosed shelters in summer. They use enclosed shelters on steep slopes for winter hibernation. An understanding of these features can allow managers to quantify Sonoran desert tortoise habitat needs and life history characteristics and to understand the impact of land use policies.
ContributorsBridges, Andrew (Author) / Bateman, Heather L (Thesis advisor) / Miller, William (Committee member) / Ulrich, Jon (Committee member) / Arizona State University (Publisher)
Created2012
Description
Law enforcement, schools and universities, health service agencies, as well as social service agencies, each acquire information from individuals that receive their services. That information gets recorded into the respective application system of each organization. The information, however, gets recorded only in the context of each service rendered and within each system used to record it. Information that is recorded by the police department for one individual is entirely different from the information that is recorded by the hospital for that same individual. What if all the organizations used the same system to record information? What if all the organizations followed the same protocols to record information as well as access it? The goal of this research was to analyze a system that allows for all organizations within a community to share information with each other. Technically, this system is feasible. However, public opinion says sharing personal information is unethical, and Federal regulation says it is unlawful. To accomplish an information-sharing system of this type, both regulation and public opinion need to be addressed.
ContributorsPullin, Britton Scott (Author) / Schildgen, Thomas (Thesis advisor) / Prewitt, Deborah (Committee member) / Ralston, Laurel (Committee member) / Arizona State University (Publisher)
Created2012
Description
Generally speaking, many programs of interior design have had a gender imbalance in the student population. As a case in point, the interior design program at Arizona State University (ASU) is at present ninety percent female. While other design programs such as architecture or industrial design have achieved gender balance, interior design has not. This research explores the reasons why male students are not enrolling in the interior design program at ASU and to what degree gender influences the selection of a major. The objectives of this research are to determine: 1) what role gender plays in the selection of interior design as a choice of a major at ASU; 2) why might male students be hesitant to join the interior design program; 3) why female students are attracted to interior design; 4) if there are gender differences in design approach; and 5) if curricular differences between interior architecture and interior design impact the gender imbalance. A mixed method approach is used in order to answer the research questions including: a literature review, a visual ethnography, and interviews of interior design students and faculty members at ASU. The results reveal that gender might have an effect on students' decision to join the interior design program. For a male student, people questioned his sexuality because they assumed he would have to be of a certain sexual orientation to study interior design. According to a male faculty member upon visiting a middle school on career day, young boys would be interested in the projects displayed at the interior design booth until they figured out what it was. Even at a young age, the boys seemed to know that interior design was a female's domain. A participant stated that women seemed to be less critical of the men's projects and were more critical of each other. A male respondent stated that on the occasion there were no men in the class the studio culture changed. Another stated that interior design students did not take feedback as well as others and need to be affirmed more often. Gender socialization, the history of interior design as a feminine career, and the title "interior design" itself are all possible factors that could deter male students from joining the program. The insights acquired from this research will provide students and faculty members from The Design School and beyond a better understanding of gender socialization and what the interior design program has to offer.
ContributorsRuff, Charlene (Author) / Giard, Jacques (Thesis advisor) / Heywood, William (Committee member) / Margolis, Eric (Committee member) / Arizona State University (Publisher)
Created2014
Description
Efficiency of components is an ever increasing area of importance to portable applications, where a finite battery means finite operating time. Higher efficiency devices need to be designed that don't compromise on the performance that the consumer has come to expect. Class D amplifiers deliver on the goal of increased efficiency, but at the cost of distortion. Class AB amplifiers have low efficiency, but high linearity. By modulating the supply voltage of a Class AB amplifier to make a Class H amplifier, the efficiency can increase while still maintaining the Class AB level of linearity. A 92dB Power Supply Rejection Ratio (PSRR) Class AB amplifier and a Class H amplifier were designed in a 0.24um process for portable audio applications. Using a multiphase buck converter increased the efficiency of the Class H amplifier while still maintaining a fast response time to respond to audio frequencies. The Class H amplifier had an efficiency above the Class AB amplifier by 5-7% from 5-30mW of output power without affecting the total harmonic distortion (THD) at the design specifications. The Class H amplifier design met all design specifications and showed performance comparable to the designed Class AB amplifier across 1kHz-20kHz and 0.01mW-30mW. The Class H design was able to output 30mW into 16Ohms without any increase in THD. This design shows that Class H amplifiers merit more research into their potential for increasing efficiency of audio amplifiers and that even simple designs can give significant increases in efficiency without compromising linearity.
ContributorsPeterson, Cory (Author) / Bakkaloglu, Bertan (Thesis advisor) / Barnaby, Hugh (Committee member) / Kiaei, Sayfe (Committee member) / Arizona State University (Publisher)
Created2013
Description
This thesis explores the role of film industry boosterism in Arizona from 1911 to 2014; it argues that boosters consistently employed film as a promotional tool toward building state identity for Arizona. These boosters harnessed a variety of strategies catered specifically to a combination of personal interests and historical circumstances. Consequently, their efforts produced a variety of identities for Arizona that changed over time as new generations of boosters addressed different concerns. These state identities that boosters wanted to build relied heavily on the power of perception, often attempting to overcome or reinforce stereotypical imagery and iconography associated with Arizona. Over time, boosters used the film industry to project Arizona as: a modern and progressive state that had outgrown its frontier past; an ideal setting to make films that relived the mythical Wild West; a film-friendly place of business ideally suited for Hollywood production; and a cultural haven for filmic sophistication. Textual analysis of primary sources comprises the methodology of this thesis. Primary sources include historical newspapers, such as the Arizona Republican, and archival records of Arizona's past governors, including Governors Jack R. Williams and Raul H. Castro. These sources constitute valuable documentation created by boosters in the course of their day-to-day activities promoting Arizona, providing a window into their aspirations, worldviews and strategies. Personal interviews with active and retired members of Arizona's film boosting community are also included as primary source material, intended to capture firsthand accounts of filmic activity in the state. Using these sources as its foundation, this thesis fills a gap in the historiography by analyzing the relationship between the film industry and Arizona's state identity. While a handful of scholarly works have discussed Arizona's film history to a minor extent, they tend to take a pure narrative approach, or offer a "behind-the-scenes" look that focuses on the production aspects of films shot in Arizona. No other work focuses explicitly on boosterism or explores the statewide meaning of Arizona's film history over such a comprehensive period of time. Thus, this thesis offers a previously neglected history of both film and Arizona.
ContributorsEhrfurth, Ryan (Author) / Thompson, Victoria (Thesis advisor) / Vandermeer, Philip (Committee member) / Smith, Karen (Committee member) / Arizona State University (Publisher)
Created2014
Description
This ethnographic study contributes to the literature on Latin@ youth in the US by focusing on the experiences of Latin@ youth in Arizona and their identity management practices. The data from 9 months of field observations and 11 unstructured interviews provides a vivid picture of the youth's daily encounters. Using a thematic analysis this study reveals the youth's experiences in occupying predominantly white spaces, managing privilege, and managing negative stereotypes. The youth's involvement at El Centro, an Arizona nonprofit organization, provided them a safe space in which they created a familial environment for themselves and their peers.
ContributorsTerminel Iberri, Ana (Author) / Mean, Lindsey (Thesis advisor) / Téllez, Michelle (Thesis advisor) / Gruber, Diane (Committee member) / Arizona State University (Publisher)
Created2014
Description
This thesis examines the immediate post-World War II operational strategy of Valley National Bank of Arizona, a Phoenix-based institution in operation from 1899 until its 1992 acquisition by Ohio-based Banc One Corporation (now JPMorgan Chase). For the purposes of this study, the immediate post-war period is defined as 1944 to January 20, 1953, a span that opens with the bank's wartime planning efforts for the post-war period and ends with the 1953 retirement of bank president Walter Bimson. By the end of World War II, Valley National ranked as the largest financial institution in the eight-state Rocky Mountain region, as measured by total deposits. However, post-war regulatory issues, competitor expansion, and an inability to generate deposit volume sufficient to meet subject period loan demands challenged bank leaders seeking to maintain market share and grow company profitability and stock value. In response to these difficulties, the bank focused on a three-pronged operational strategy emphasizing advertising, market-appropriate deposit and loan product offerings, and an aggressive branching and acquisition campaign. This strategy did not result in unmitigated success as the bank did experience a decrease in average deposit account balances, lost mortgage market share, and undertook acquisition activity that later resulted in federal antitrust action. However, by the end of the subject period, the three-pronged strategy employed by the bank did result in an increase in deposit dollar market share, as measured by deposits controlled directly and indirectly by the institution, rising annual net profits, and substantial share price appreciation. The findings related to bank strategy and results presented in this thesis are based primarily upon information found in the 169-box Valley National Bank Collection housed at the Arizona Historical Society. Extensive newspaper research conducted using targeted date range and keyword searches and careful consideration of secondary source materials relating to the bank, the banking industry, and state, regional, and national politics, economics, and culture during the subject period provided additional information used in this study, and corroborated much of the material found in the Valley National Bank Collection files.
ContributorsSouthard, John (Author) / Warren-Findley, Jannelle (Thesis advisor) / Vandermeer, Philip (Committee member) / Gammage, Jr., Grady (Committee member) / Arizona State University (Publisher)
Created2011