Matching Items (14)
Filtering by
- Genre: Masters Thesis
Description
There is growing concern over the future availability of water for electricity generation. Because of a rapidly growing population coupled with an arid climate, the Western United States faces a particularly acute water/energy challenge, as installation of new electricity capacity is expected to be required in the areas with the most limited water availability. Electricity trading is anticipated to be an important strategy for avoiding further local water stress, especially during drought and in the areas with the most rapidly growing populations. Transfers of electricity imply transfers of "virtual water" - water required for the production of a product. Yet, as a result of sizable demand growth, there may not be excess capacity in the system to support trade as an adaptive response to long lasting drought. As the grid inevitably expands capacity due to higher demand, or adapts to anticipated climate change, capacity additions should be selected and sited to increase system resilience to drought. This paper explores the tradeoff between virtual water and local water/energy infrastructure development for the purpose of enhancing the Western US power grid's resilience to drought. A simple linear model is developed that estimates the economically optimal configuration of the Western US power grid given water constraints. The model indicates that natural gas combined cycle power plants combined with increased interstate trade in power and virtual water provide the greatest opportunity for cost effective and water efficient grid expansion. Such expansion, as well as drought conditions, may shift and increase virtual water trade patterns, as states with ample water resources and a competitive advantage in developing power sources become net exporters, and states with limited water or higher costs become importers.
ContributorsHerron, Seth (Author) / Ruddell, Benjamin L (Thesis advisor) / Ariaratnam, Samuel (Thesis advisor) / Allenby, Braden (Committee member) / Williams, Eric (Committee member) / Arizona State University (Publisher)
Created2013
Description
Chronic restraint stress impairs hippocampal-mediated spatial learning and memory, which improves following a post-stress recovery period. Here, we investigated whether brain derived neurotrophic factor (BDNF), a protein important for hippocampal function, would alter the recovery from chronic stress-induced spatial memory deficits. Adult male Sprague-Dawley rats were infused into the hippocampus with adeno- associated viral vectors containing the coding sequence for short interfering (si)RNA directed against BDNF or a scrambled sequence (Scr), with both containing the coding information for green fluorescent protein to aid in anatomical localization. Rats were then chronically restrained (wire mesh, 6h/d/21d) and assessed for spatial learning and memory using a radial arm water maze (RAWM) either immediately after stressor cessation (Str-Imm) or following a 21-day post-stress recovery period (Str-Rec). All groups learned the RAWM task similarly, but differed on the memory retention trial. Rats in the Str-Imm group, regardless of viral vector contents, committed more errors in the spatial reference memory domain than did non-stressed controls. Importantly, the typical improvement in spatial memory following recovery from chronic stress was blocked with the siRNA against BDNF, as Str-Rec-siRNA performed worse on the RAWM compared to the non-stressed controls or Str-Rec-Scr. These effects were specific for the reference memory domain as repeated entry errors that reflect spatial working memory were unaffected by stress condition or viral vector contents. These results demonstrate that hippocampal BDNF is necessary for the recovery from stress-induced hippocampal dependent spatial memory deficits in the reference memory domain.
ContributorsOrtiz, J. Bryce (Author) / Conrad, Cheryl D. (Thesis advisor) / Olive, M. Foster (Committee member) / Taylor, Sara (Committee member) / Bimonte-Nelson, Heather A. (Committee member) / Arizona State University (Publisher)
Created2013
Description
Sometimes difficult life events challenge our existing resources in such a way that routinized responses are inadequate to handle the challenge. Some individuals will persist in habitual, automatic behavior, regardless of environmental cues that indicate a mismatch between coping strategy and the demands of the stressor. Other individuals will marshal adaptive resources to construct new courses of action and reconceptualize the problem, associated goals and/or values. A mixed methods approach was used to describe and operationalize cognitive shift, a relatively unexplored construct in existing literature. The study was conducted using secondary data from a parent multi-year cross-sectional study of resilience with eight hundred mid-aged adults from the Phoenix metro area. Semi-structured telephone interviews were analyzed using a purposive sample (n=136) chosen by type of life event. Participants' beliefs, assumptions, and experiences were examined to understand how they shaped adaptation to adversity. An adaptive mechanism, "cognitive shift," was theorized as the transition from automatic coping to effortful cognitive processes aimed at novel resolution of issues. Aims included understanding when and how cognitive shift emerges and manifests. Cognitive shift was scored as a binary variable and triangulated through correlational and logistic regression analyses. Interaction effects revealed that positive personality attributes influence cognitive shift most when people suffered early adversity. This finding indicates that a certain complexity, self-awareness and flexibility of mind may lead to a greater capacity to find meaning in adversity. This work bridges an acknowledged gap in literature and provides new insights into resilience.
ContributorsRivers, Crystal T (Author) / Zautra, Alex (Thesis advisor) / Davis, Mary (Committee member) / Kurpius, Sharon (Committee member) / Arizona State University (Publisher)
Created2014
Description
Female college veterans face a host of struggles both personally and academically. Research that focuses primarily on female veterans’ wellness needs as they transition into civilian life is limited and this population is woefully understudied in comparison to male veterans. The purpose of this study was to describe and explore some of the wellness needs of female college veterans making the transition from military service to college/civilian life. Twelve hundred and thirty female veterans from a University Veterans Center were sent a recruitment email where 125 successfully completed a life satisfaction (Frisch, 1994), physical activity (Craig et al., 2003), resilience (Connor & Davidson, 2003), and a five-facet mindfulness (Baer et al., 2008) questionnaire. The means for this population were: Quality of life (M= 37.8), Resilience (M= 70.5), Physical Activity MET minutes (M= 4,605), and Five-facet mindfulness (M= Observing 3.50, Describing = 3.38, Acting with Awareness M= 3.02, Non-Judging of Inner Experience M= 2.98, Non-reactivity to Inner Experience M= 3.06). Resilience was significantly (p <0.01) and positively correlated to all five domains of mindfulness (range r = 0.332 – 0.534) and was negatively associated with Quality of Life (QOL) (r= -0.204). Vigorous Activity minutes and Total Met Minutes were both positively associated with QOL (r= 0.300 and r= 0.199 respectively). This population of female veterans self-reported to have very low/low life satisfaction, low resilience, and high physical activity levels. The behaviors and traits reported in these female college veterans provide important information for developing resources and potential interventions in the future.
ContributorsYu, Gladys Marie Tiu Lim (Author) / Swan, Pamela (Thesis advisor) / Sebren, Ann (Committee member) / Davis-Strong, Devi (Committee member) / Arizona State University (Publisher)
Created2019
Description
Resettled refugees face numerous challenges including unsafe living conditions, loss of permanent shelter, adjustment to a new culture, loneliness, and separation from family, friends, and community. Of particular importance is the lack of a feeling of sense of community (SOC) within their new surroundings. SOC is not only worthwhile as an outcome of its own, but may also predict additional positive outcomes such as resilience and cultural adjustment. Literature has shown participation in sport can develop youth positively and build social skills, while studies in other regions of the world have also found a sport team setting to be a place for immigrants to experience SOC. In this study, I use a congruent mixed methods approach to both explore the experience of SOC for youth refugees in a soccer club, and examine the relation of SOC to resilience and cultural adjustment. Using photo-elicitation and semi-structured interviews with 11 youth participants, the qualitative portion of the study explored SOC among youth participants. Findings note the presence of SOC as matched to theoretical frameworks both specific to sport, and to a more general theory of SOC. Further data were collected through questionnaires distributed to club members. Results from the quantitative analysis indicate a significant positive relation between SOC and resilience, and SOC and perceived acculturation. This study’s contribution is to illustrate how refugee youth in a sport club in the United States experience SOC, and the impact of that SOC. Results suggest practical implications for sport managers who wish to provide positive sport experiences for youth refugees.
ContributorsFader, Nina (Author) / Legg, Eric (Thesis advisor) / Larsen, Dale (Committee member) / Klimek, Barbara (Committee member) / Arizona State University (Publisher)
Created2018
Description
A growing body of research indicates that people of multiple racial lineages in the US encounter challenges to positive psychological adjustment because of their racial status. In response, they also exhibit unique resilience strategies to combat these challenges. In this study, the moderating roles of previously identified multiracial resilient factors (i.e., shifting expressions, creating third space, and multiracial pride) were examined in the associations between unique multiracial risk factors (i.e., multiracial discrimination, perceived racial ambiguity, and lack of family acceptance) and psychological adjustment (i.e., satisfaction with life, social connectedness, and distress symptoms) of multiracial adults. Drawing on risk and resilience theory, results first indicated that the multiracial risk factors (i.e., multiracial discrimination, perceived racial ambiguity, and lack of family acceptance) relate negatively with social connectedness and distress symptoms, but did not significantly relate with satisfaction with life. Additionally, a differential moderating effect for one multiracial resilient factor was found, such that the protective or exacerbative role of creating third space depends on the psychological outcome. Specifically, results suggest creating third space buffers (e.g., weakens) the association between multiracial discrimination and satisfaction with life as well as lack of family acceptance and satisfaction with life among multiracial adults. Results further suggest creating third space exacerbates (e.g., strengthens) the negative association between perceived racial ambiguity on social connectedness and distress symptoms as well as lack of family acceptance on social connectedness and distress symptoms. Moreover, no two-way interaction effects were found for either of the other multiracial resilient factors (i.e., shifting expressions and multiracial pride). This study highlights the complex nature of racial identity for multiracial people, and the nuanced risk and resilience landscape encountered in the US.
ContributorsJohnson, Preston (Author) / Yoo, Brandon (Thesis advisor) / Tran, Alisia (Thesis advisor) / Bludworth, James (Committee member) / Arizona State University (Publisher)
Created2018
Description
Infrastructure are increasingly being recognized as too rigid to quickly adapt to a changing climate and a non-stationary future. This rigidness poses risks to and impacts on infrastructure service delivery and public welfare. Adaptivity in infrastructure is critical for managing uncertainties to continue providing services, yet little is known about how infrastructure can be made more agile and flexible towards improved adaptive capacity. A literature review identified approximately fifty examples of novel infrastructure and technologies which support adaptivity through one or more of ten theoretical competencies of adaptive infrastructure. From these examples emerged several infrastructure forms and possible strategies for adaptivity, including smart technologies, combined centralized/decentralized organizational structures, and renewable electricity generation. With institutional and cultural support, such novel structures and systems have the potential to transform infrastructure provision and management.
ContributorsGilrein, Erica (Author) / Chester, Mikhail (Thesis advisor) / Garcia, Margaret (Committee member) / Allenby, Braden (Committee member) / Arizona State University (Publisher)
Created2018
Description
Although adverse events cannot always be prevented, the negative outcomes on development can potentially be modified by considering methods of fostering positive emotional and behavioral responses. The study examined biopsychosocial health outcomes in the presence of uncontrollable adverse childhood events with the goal of identifying a potential intervention to increase resilience, health, and safe behaviors among at-risk children. It was hypothesized that adverse events can result in positive biopsychosocial outcomes in the presence of high scores on the Positive Emotion, Engagement, Relationships, Meaning, and Accomplishments (PERMA) model of well-being, self-efficacy, gratitude, and the ability to envision a positive future self. The study retrospectively examined adverse childhood events and present behavioral, emotional, and physical health outcomes. Participant (n = 685) data were analyzed using Hayes PROCESS (v3.5) to test all components of the moderation model. Results suggest that as adverse events increase, health adversity also increases. However, those with high intrapersonal strengths showed better health outcomes. Through understanding intrapersonal pathways in the presence of adverse events, the study can potentially identify mechanisms important for promoting resilient outcomes in childhood that could cascade into adulthood.
ContributorsBraunstein, Bailey Marie (Author) / Mickelson, Kristin (Thesis advisor) / Hall, Deborah (Committee member) / Lindstrom-Johnson, Sarah (Committee member) / Arizona State University (Publisher)
Created2022
Description
Transgender and nonbinary (TNB) people experience elevated rates of post-traumatic stress disorder (PTSD) due to transphobic violence, discrimination, microaggressions, and minority stress. Oppression against TNB people could also contribute to complex post-traumatic stress disorder (c-PTSD) symptoms, which arises due to exposure to prolonged and repeated trauma from a state of subordination. Nonbinary people in particular experience unique chronic minority stressors (e.g., misgendering, interpersonal invalidation) because of the assumption that gender is inherently binary. These chronic minority stressors threaten nonbinary people’s psychological and interpersonal senses of safety. This study aims to examine how misgendering and invalidation can predict PTSD and c-PTSD symptoms among nonbinary people and whether this association is moderated by pride and community connectedness. Cross-sectional data from 611 nonbinary people were analyzed using hierarchical linear regressions. Misgendering and invalidation were found to be significant predictors of PTSD and c-PTSD symptoms. However, pride and community connectedness were not significant moderators of these associations. Findings from this study contribute to the conceptualizations of traumatic stress among nonbinary people and provide considerations for more affirming trauma-informed care. Future research should explore how additional resilience factors may promote resilience and healing for nonbinary people coping with trauma.
ContributorsColson, Alex (Author) / Matsuno, Em (Thesis advisor) / Randall, Ashley (Committee member) / Barr, Sebastian (Committee member) / Arizona State University (Publisher)
Created2023
Description
This study draws upon original data to identify protective factors of resilience among Indigenous college students who experience victimization with the goal of facilitating safety and health. The data draws from 16 interviews and 95 surveys with Indigenous college students about their victimization, including their experiences with the global issue of Missing and Murdered Indigenous Peoples (MMIP). This research uses a decolonizing methodology, a trauma-informed approach, and a human-centered design while incorporating aspects of community-based participatory research with Indigenous populations. Many participants experienced at least one form of victimization (82%), and nearly all (94%) were aware of the MMIP crisis. Interviews revealed that MMIP had an emotional, psychological, and social impact on students regardless of their relationship with a victim. Participants identified several protective factors that enhanced their resilience, including reclaiming identity, reciprocity, taking healing actions, self-reflection, taking healthy risks, having goals, being with their community and their family, and having courage and strength. These findings provide support for five culturally appropriate university policy recommendations to enhance Indigenous students’ resilience through culturally-competent programming, evaluation, and training.
ContributorsHarvey, Cassie L. (Author) / Fox, Kathleen A. (Thesis advisor) / Stolzenberg, Stacia (Committee member) / Sharp, Christopher (Committee member) / Arizona State University (Publisher)
Created2023