Browsing by Subject "resilience"
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Item From Theory to Application: Extreme Fire, Resilience, Restoration, and Education in Social-Ecological Disciplines(2012-07-16) Twidwell, DiracConceptual and theoretical advancements have been developed in recent years to break down the assumptions and traditional boundaries that establish seemingly independent disciplines, and the research outlined in this dissertation aspires to build on these advancements to provide innovative solutions to a broad array of modern problems in social-ecological. I used a variety of techniques to address challenges ranging from disconnections between theory and application, perceived versus realized roles of prescribed fire in resprouting shrublands, and the need for broader participation in research as part of undergraduate education. The chapters in this dissertation serve as a case-study approach across multiple scientific disciplines that overcome the traditions and assumptions that conflict with our ability to develop innovative solutions to modern social-ecological problems. First, I bridge theoretical and applied concepts by showing how recent theoretical advancements in resilience can be integrated into a predictive framework for environmental managers. Second, experimental data from multiple experiments were collected in two ecological regions of Texas to assess the potential for using extreme fire, in isolation and in combination with herbicide, as a novel intervention approach in resprouting shrublands of the southern Great Plains. The findings from these experiments demonstrate the importance of moving past traditional assumptions of when prescribed fire should be applied to demonstrate new patterns of woody plant responses to the applications of ?more extreme? prescribed fires while not causing undesirable invasions by exotic grasses and exotic insects. Finally, I initiated a PhD instructed course on undergraduate research that sought to increase undergraduate participation while lowering the costs of conducting research. This chapter shows how traditional approaches of supporting undergraduate research are incapable of meeting the broader goals established by society and reveal a novel approach that can provide an additional pathway for supporting undergraduate student participation at large, research-based universities. Ultimately, this research suggests that our capacity to enhance services in social-ecological systems ultimately hinges upon the integration of theoretical and applied concepts that drive policy and governance and overcoming the assumptions and traditions that limit their integration.Item Life Experiences and Resilience in College Students: A Relationship Influenced by Hope and Mindfulness(2010-01-16) Collins, Amy B.This study examines the effects of hope and mindfulness on the relationship between life experiences and resilience, as well as the direct relationships among these constructs. Participants were 537 undergraduates who were taking online courses at Texas A&M University. Most participants were traditionally-aged and female. Quantitative self-report measures for each construct were administered online via SurveyMonkey. The small, positive relationship between life events and resilience approached, but did not reach, statistical significance, and hope but not mindfulness was found to moderate this relationship. Correlations were significant, positive, and linear between resilience and hope (r = .57, p < .01), resilience and mindfulness (r = .50, p less than .01), and hope and mindfulness (r = .44, p less than .01). Suggestions for clinical interventions aimed at increasing resilience by increasing hope and mindfulness are providedItem Long-Term Marriages Among Nigerian Immigrants: A Qualitative InquiryNwachukwu, Thomas KizitoItem The Experience of Job-Displaced Mexican-Americans From San Antonio, Texas Who Have Received Retraining(2012-10-19) Mena, DianaWhat is the meaning of the Mexican-American's job displacement and participation in a training program? To answer this question, this study adopted hermeneutic phenomenology as a methodological approach. My intention was to search for deep meaning of job displacement followed by entering an educational program. Ten Mexican-American individuals who had been displaced from their job due to economic and trade reasons, and who later participated in a retraining program, were interviewed. Tentative themes were drawn from the analysis, and 15 thematic categories were confirmed after follow-up interviews. The themes were: Mexican-American Culture, Machismo, Self-determination, Resilience, Union Membership, Job Security, Have Someone Advocate for Their Rights, Job Displacement, Trade-related Closure, Breach of the Psychological Contract, Emotional Distress, Education and Retraining, Entrepreneurship and Problems with Workforce Benefits. The themes were expanded based on participants' words and then discussed through a post-analysis literature review. Recommendations were made to government and non-government organizations advocating for a potential change in policies. Recommendations were also provided to healthcare providers and to U.S. American workers. Finally, recommendations were made for future research.Item Voltage and Timing Adaptation for Variation and Aging Tolerance in Nanometer VLSI Circuits(2012-09-10) Shim, Kyu-Nam 1978-Process variations and circuit aging continue to be main challenges to the power-efficiency of VLSI circuits, as considerable power budget must be allocated at design time to mitigate timing variations. Modern designs incorporate adaptive techniques for variation compensation to reduce the extra power consumption. The efficiency of existing adaptive approaches, however, is often significantly attenuated by the fine-grained nature of variations in nanometer technology such as random dopant fluctuation, litho-variation, and different rates of transistor degradation due to non-uniform activity factors. This dissertation addresses the limitations from existing adaptation techniques, and proposes new adaptive approaches to effectively compensate the fine-grained variations. Adaptive supply voltage (ASV) is one of the effective adaptation approaches for power-performance tuning. ASV has advantages on controlling dynamic and leakage power, while voltage generation and delivery overheads from conventional ASV systems make their application to mitigate fine-grained variations demanding. This dissertation presents a dual-level ASV system which provides ASV at both coarse-grained and fine-grained level, and has limited power routing overhead. Significant power reduction from our dual-ASV system demonstrates its superiority over existing approaches. Another novel technique on supply voltage adaptation for variation resilience in VLSI interconnects is proposed. A programmable boostable repeater design boosts switching speed by raising its internal voltage rail transiently and autonomously, and achieves fine-grained voltage adaptation without stand-alone voltage regulators or additional power grid. Since interconnect is a widely recognized bottleneck to chip performance and tremendous repeaters are employed on chip designs, boostable repeater has plenty of chances to improve system robustness. A low cost scheme for delay variation detection is essential to compose an efficient adaptation system. This dissertation presents an area-efficient built-in delay testing scheme which exploits BIST SCAN architecture and dynamic clock skew control. Using this built-in delay testing scheme, a fine-grained adaptation system composed of the proposed boostable repeater design and adaptive clock skew control is proposed, and demonstrated to mitigate process variation and aging induced timing degradations in a power as well as area efficient manner.