Matching Items (43,917)
Description
This research addresses the ability for neighborhoods to assess resiliency as it applies to their respective local areas. Two demographically and economically contrasting neighborhoods in Glendale, Arizona were studied to understand what residents' value and how those values link to key principles of resiliency. Through this exploratory research, a community-focused process was created to use these values in order to link them to key principles of resiliency and potential measureable indicators. A literature review was conducted to first assess definitions and key principles of resiliency. Second, it explored cases of neighborhoods or communities that faced a pressure or disaster and responded resiliently based on these general principles. Each case study demonstrated that resiliency at the neighborhood level was important to its ability to survive its respective pressure and emerge stronger. The Heart of Glendale and Thunderbird Palms were the two neighborhoods chosen to test the ability to operationalize neighborhood resiliency in the form of indicators. First, an in-depth interview was conducted with a neighborhood expert to understand each area's strengths and weaknesses and get a context for the neighborhood and how it has developed. Second, a visioning session was conducted with each neighborhood consisting of seven participants to discuss its values and how they relate to key principles of resiliency. The values were analyzed and used to shape locally relevant indicators. The results of this study found that the process of identifying participants' values and linking them to key principles of resiliency is a viable methodology for measuring neighborhood resiliency. It also found that indicators and values differed between the Heart of Glendale, a more economically vulnerable yet ethnically diverse area, than Thunderbird Palms, a more racially homogenous, middle income neighborhood. The Heart of Glendale valued the development of social capital more than Thunderbird Palms which placed a higher value on the condition of the built environment as a vehicle for stimulating vibrancy and resiliency in the neighborhood. However, both neighborhoods highly valued public education and providing opportunities for children to be future leaders in their local communities.
Contributors
Acevedo, Shannon (Author) / Pijawka, K. David (Thesis advisor) / Phillips, Rhonda (Committee member) / Lara-Valencia, Francisco (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Coal bed natural gas (CBNG) production has become a significant contribution to the nation's energy supply. Large volumes of water are generated as a byproduct of CBNG extraction, of which this "product water" is relatively high in sodium. High sodicity reduces water quality and limits environmentally compliant disposal options for producers. Crop irrigation with CBNG product water complies with state and federal laws and is a disposal method that also provides a beneficial use to private landowners. However, this disposal method typically requires gypsum and sulfur soil amendments due to the high levels of sodium in the water, which can reduce soil infiltration and hydraulic conductivity. In this study, I tested a new product called Salt Extractor that was marketed to CBNG producers to ameliorate the negative effects of high sodicity. The experiment was conducted in the Powder River Basin of Wyoming. I used a random block design to compare the soil and vegetation properties of plots following application with CBNG product water and treatments of either Salt Extractor, gypsum and sulfur (conventional), or no treatment (control). Data was analyzed by comparing the amount of change between treatments after watering. Results demonstrated the known ability of gypsum and sulfur to lower the relative sodicity of the soil. Plots treated with Salt Extractor, however, did not improve relative levels of sodicity and exhibited no favorable benefits to vegetation.
Contributors
Adams, Shelly (Author) / Hall, Sharon (Thesis advisor) / Chew, Matt (Committee member) / Stromberg, Juliet (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Many studies have shown that access to healthy food in the US is unevenly distributed and that supermarkets and other fresh food retailers are less likely to be located in low-income minority communities, where convenience and dollar stores are more prevalent grocery options. I formed a partnership with Phoenix Revitalization Corporation, a local community development organization engaged in Central City South, Phoenix, to enhance the community's capacity to meet its community health goals by improving access to healthy food. I used a community-based participatory approach that blended qualitative and quantitative elements to accommodate collaboration between both academic and non-academic partners. Utilizing stakeholder interviews, Nutrition Environment Measures Surveys (NEMS), and mapping to analyze the community's food resources, research revealed that the community lacks adequate access to affordable, nutritious food. Community food stores (n=14) scored an average of 10.9 out of a possible 54 points using the NEMS scoring protocol. The community food assessment is an essential step in improving access to healthy food for CCS residents and provides a baseline for tracking progress to improve residents' food access. Recommendations were drafted by the research partnership to equip and empower the community with strategic, community-specific interventions based on the research findings.
Contributors
Crouch, Carolyn (Author) / Harlan, Sharon (Thesis advisor) / Eakin, Hallie (Committee member) / Aftandilian, David (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Dating violence in ethnic minority populations is an understudied phenomenon and little attention has been paid to the experiences of Mexican American youth; less research has been done on how those experiences alter perceptions and acceptance of participation in prevention programs. This study advances knowledge on how Mexican American adolescents view dating violence prevention programs and how cultural beliefs and values may hinder or encourage effective participation. Focus groups (N = 9) were form with Mexican American youth aged 15-17 years separated by gender and acculturation status (Mexican Oriented/Bicultural/Anglo Oriented), as determined previously by acculturation scores measured by the Acculturation Rating Scale for Mexican Americans (ARMSA; 0 or below = Mexican Oriented, 0-1 = Bicultural, 1 or above = Anglo Oriented). Several themes emerged throughout the focus group discussions that were derived from culturally-based needs. Mexican American adolescents made recommendations for program development (e.g., a broad curriculum beyond the topic of dating violence) and delivery (e.g., barriers to participation, the implications of peer involvement) within the context of their cultural values and needs. Low acculturated and bicultural teens identified specific cultural needs and their relevance within a dating violence prevention program. However, across all groups, adolescents felt that the needs of Mexican American youth were similar to other youth in regards to dating violence prevention programs. Implications for how social work can best design and implement prevention programs for Mexican American adolescents are discussed.
Contributors
Altamirano, Bianca (Author) / Williams, Lela R (Thesis advisor) / Ayón, Cecilia (Committee member) / Marsiglia, Flavio F (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Though police-involved homicides have generated controversy and caused community disruptions and riots for many years, few efforts to systematically capture and study these events exist. The lack of research on arrest-related deaths (ARDs) is particularly troubling not only because of the consequences of these events, but also because the nature of how these deaths occur may also be changing. In particular, recent attention has shifted away from incidents where police use firearms to incidents where other less-lethal tools are used but death still occurs (e.g., TASERs). In 2000, the Federal Government sought to address this problem through the creation of the Deaths in Custody Reporting Program (DCRP), a national-level voluntary reporting system managed by the Bureau of Justice Statistics. There have been few efforts, however, that have assessed the accuracy and completeness of the DCRP data collection. The current study seeks to accomplish this through a comparison of ARDs in the DCRP to open-source, web-based media reports of ARDs in a stratified, random sample of 12 states during 2005. The study finds that all types of ARDs, not just police-involved homicides, are not accurately and reliably reported. Furthermore, the information provided is not reliably reported or interesting to research initiatives. Improvements in how the data is collected and what type of data is collected are needed. This adds to the scholarly research that advocates for a systematic and reliable national dataset of all deaths that occur in the process of arrest.
Contributors
Borrego, Andrea (Author) / White, Michael D. (Thesis advisor) / Kane, Robert (Committee member) / Fornango, Robert (Committee member) / Arizona State University (Publisher)
Created
2011
Description
A collection of short stories, each told with a differing narrative structure and a different cast of characters. Some stories in the collection employ traditional narrative structures such as the frame tale and the three-act structure. Other stories borrow their structures from society at large, the bombardment of text and media Americans face every day (letters, recipes, song lyrics). The stories explore how people can read our world and possibly interpret larger shared narrative strands. These stories focus attention on human responses to illness, loss, family, war and protest, looking for opportunities to expand recognition of the range of emotions, moving beyond generic understanding to personal connection. The tone of the collection tends towards dark humor to hint at the deeper, possibly inexplicable human condition.
Contributors
Blickle, Benjamin (Author) / Turchi, Peter (Thesis advisor) / McNally, Mike (Committee member) / Pritchard, Melissa (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Responding to the allegedly biased research reports issued by large investment banks, the Global Research Analyst Settlement and related regulations went to great lengths to weaken the conflicts of interest faced by investment bank analysts. In this paper, I investigate the effects of these changes on small and large investor confidence and on trading profitability. Specifically, I examine abnormal trading volumes generated by small and large investors in response to security analyst recommendations and the resulting abnormal market returns generated. I find an overall increase in investor confidence in the post-regulation period relative to the pre-regulation period consistent with a reduction in existing conflicts of interest. The change in confidence observed is particularly striking for small traders. I also find that small trader profitability has increased in the post-regulation period relative to the pre-regulation period whereas that for large traders has decreased. These results are consistent with the Securities and Exchange Commission's primary mission to protect small investors and maintain the integrity of the securities markets.
Contributors
Dong, Xiaobo (Author) / Mikhail, Michael (Thesis advisor) / Hwang, Yuhchang (Committee member) / Hugon, Artur J (Committee member) / Arizona State University (Publisher)
Created
2011
Description
This dissertation transforms a set of system complexity reduction problems to feature selection problems. Three systems are considered: classification based on association rules, network structure learning, and time series classification. Furthermore, two variable importance measures are proposed to reduce the feature selection bias in tree models. Associative classifiers can achieve high accuracy, but the combination of many rules is difficult to interpret. Rule condition subset selection (RCSS) methods for associative classification are considered. RCSS aims to prune the rule conditions into a subset via feature selection. The subset then can be summarized into rule-based classifiers. Experiments show that classifiers after RCSS can substantially improve the classification interpretability without loss of accuracy. An ensemble feature selection method is proposed to learn Markov blankets for either discrete or continuous networks (without linear, Gaussian assumptions). The method is compared to a Bayesian local structure learning algorithm and to alternative feature selection methods in the causal structure learning problem. Feature selection is also used to enhance the interpretability of time series classification. Existing time series classification algorithms (such as nearest-neighbor with dynamic time warping measures) are accurate but difficult to interpret. This research leverages the time-ordering of the data to extract features, and generates an effective and efficient classifier referred to as a time series forest (TSF). The computational complexity of TSF is only linear in the length of time series, and interpretable features can be extracted. These features can be further reduced, and summarized for even better interpretability. Lastly, two variable importance measures are proposed to reduce the feature selection bias in tree-based ensemble models. It is well known that bias can occur when predictor attributes have different numbers of values. Two methods are proposed to solve the bias problem. One uses an out-of-bag sampling method called OOBForest, and the other, based on the new concept of a partial permutation test, is called a pForest. Experimental results show the existing methods are not always reliable for multi-valued predictors, while the proposed methods have advantages.
Contributors
Deng, Houtao (Author) / Runger, George C. (Thesis advisor) / Lohr, Sharon L (Committee member) / Pan, Rong (Committee member) / Zhang, Muhong (Committee member) / Arizona State University (Publisher)
Created
2011
Description
Negative bias temperature instability (NBTI) and channel hot carrier (CHC) are important reliability issues impacting analog circuit performance and lifetime. Compact reliability models and efficient simulation methods are essential for circuit level reliability prediction. This work proposes a set of compact models of NBTI and CHC effects for analog and mixed-signal circuit, and a direct prediction method which is different from conventional simulation methods. This method is applied in circuit benchmarks and evaluated. This work helps with improving efficiency and accuracy of circuit aging prediction.
Contributors
Zheng, Rui (Author) / Cao, Yu (Thesis advisor) / Yu, Hongyu (Committee member) / Bakkaloglu, Bertan (Committee member) / Arizona State University (Publisher)
Created
2011
Description
ABSTRACT Early career science teachers are often assigned to classrooms with high numbers of English language learners (ELL students). As these teachers learn to become effective practitioners, the circumstances surrounding them merit a thorough examination. This study examines the longitudinal changes in Pedagogical Content Knowledge (PCK) and practices of six early career science teachers who taught in urban schools. The teachers participated in the Alternative Support for Induction Science Teachers (ASIST) program during their initial two years of teaching. Our research team followed the participants over a five-year period. This study focuses on data from Years 1, 3, and 5. The data collected included classroom observations and interviews. In addition, classroom artifacts were collected periodically for the purpose of triangulation. The analysis of the data revealed that with the support of the ASIST program, the teachers implemented inquiry lessons and utilized instructional materials that promoted academic language skills and science competencies among their ELL students. Conversely, standardized testing, teaching assignment, and school culture played a role in constraining the implementation of inquiry-based practices. The results of this study call for collaborative efforts among university science educators and school administrators to provide professional development opportunities and support for the implementation of inquiry and language practices among early career science teachers of ELL students.
Contributors
Ortega, Irasema (Author) / Luft, Julie A (Thesis advisor) / Artiles, Alfredo (Committee member) / Baker, Dale R. (Committee member) / Arizona State University (Publisher)
Created
2011