Digital Commons Network^™

Synthesis And Electrochemical Characterization Of Pani/Ni And Pani/Au/Ni Composites, Morgan Emily Pacini

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this research is to show that the electrochemically controlled formation of monometallic and bimetallic catalysts in polyaniline (PANI) can directly influence the efficiency and reproducibility of the catalytic oxidation of methanol. PANI is a conductive polymer that provides a three-dimensional template for the metallic catalysts deposition at nitrogen sites. The controlled deposition of metallic species can be achieved using the normal oxidation/reduction cycles of PANI. The deposition of metallic species relies on anion precursors that are electrostatically bound by the polymer during the oxidation cycle. The precursor is reduced directly at the nitrogen sites in the polymer …

Surface Hydrologic Modeling And Analyzing Watershed Hydrologic Response To Landcover Change, Roshan Poudel

UNLV Theses, Dissertations, Professional Papers, and Capstones

Urban flooding is the most frequently occurring disaster in rapidly urbanizing cities. Rapid urbanization in general, is characterized by an increase in the total impervious surface area, which means less soil cover for the stormwater to infiltrate and a greater volume of runoff from the area in case of a storm event. This increased volume of surface runoff, if not drained, results in urban flooding. Urban flooding can cause serious economic and environmental damages by disrupting transportation and spreading pollution. It is therefore, essential to understand the cause, behavior and effects of urban flooding so as to minimize the risks …

Audits And Accountability In Non-Governmental Organizations, Kenneth J. Retzl

UNLV Theses, Dissertations, Professional Papers, and Capstones

Non-Governmental Organizations (NGOs) are becoming increasingly important as providers of development assistance in the Global South. As these organizations are gaining in importance, accountability concerns have grown. NGOs are considered to be accountable to a range of stakeholders, including funders, foreign governments where work is being performed, and the local communities being served. In spite of these concerns, there has been little research on the effectiveness of specific accountability mechanisms. This study empirically tests one such mechanism, the Single Audit, required by the United States' government for organizations that receive federal grant funding. Unfortunately, it is found the results of …

Acculturation And Causes Of Death Among Filipinos In The Us: Focus On Cancer, Abegail Terso Reyes

UNLV Theses, Dissertations, Professional Papers, and Capstones

Filipinos in the US are 3.4 million, yet the main causes of death among this primarily immigrant population have not been well characterized nor compared with the mortality experience of their counterparts in the Philippines. Age-adjusted mortality rates were computed for the main causes of death for three populations: Filipinos living in the Philippines (FPHs), Filipinos living in California (FCAs), and non-Hispanic whites in California (WCAs). Regression-derived mortality rate ratios stratified by sex were used to compare the populations, using WCA as the referent population. Included causes of death were ischemic heart disease, stroke, cancer and chronic lower respiratory disease, …

Miocene-Pliocene(?) Folds, Normal Faults And The Left-Lateral Buckhorn Fault With Regional Implications, Pahranagat Shear Zone, Nevada, Thomas Godfrey Price

UNLV Theses, Dissertations, Professional Papers, and Capstones

Strike-slip faults play an important role in the development and evolution of extensional regimes including in the intraplate extension in the Basin and Range province. The Basin and Range province is divided into the Northwestern, Northern, Central and Southern Basin and

Range subprovinces. The boundary zone between the Northern and Central subprovinces is marked by several left-lateral fault zones, including the Pahranagat Shear Zone (PSZ), Caliente-Enterprise Zone and Rock Valley Fault Zone. The PSZ has a close spatial and kinematic relationship with the left-lateral Caliente-Enterprise Zone, which lies to the NE, and a slightly more distal relationship to the left-lateral …

Theoretical And Experimental Investigation On The Multiple Shape Memory Ionic Polymer-Metal Composite Actuator, Qi Shen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Development of biomimetic actuators has been an essential motivation in the study of smart materials. However, few materials are capable of controlling complex twisting and bending deformations simultaneously or separately using a dynamic control system. The ionic polymer-metal composite (IPMC) is an emerging smart material in actuation and sensing applications, such as biomimetic robotics, advanced medical devices and human affinity applications. Here, we report a Multiple Shape Memory Ionic Polymer-Metal Composite (MSM-IPMC) actuator having multiple-shape memory effect, and is able to perform complex motion by two external inputs, electrical and thermal. Prior to the development of this type of actuator, …

Mapping The Landscape For Archaeological Detection, Preservation, And Interpretation: A Case Study In High Resolution Location Modeling From The Blue Mountains Of Northeastern Oregon, Trent Skinner

UNLV Theses, Dissertations, Professional Papers, and Capstones

Archaeological location modeling (ALM) is an important tool in most survey strategies, and has contributed substantially to economizing efforts to locate and characterize the archaeological record. The increasing availability of high resolution (<3m) airborne light detection and ranging (lidar) data has the potential to refine the application and ultimately the role of ALM. This research tests the precision and accuracy gained by incorporating lidar derived data into an ALM. The site records and other environmental data used in this study were all generated over the last four decades by the resource specialists of the Malheur National Forest. The Weights-of-Evidence (WofE) probability method (Bonham-Carter 1994) was used to produce two ALMs; one based on a 10m digital elevation model (DEM) created from satellite imaging, and the second from a 3m resolution lidar derived DEM. Independent variables (e.g., slope, aspect, distance to water, etc.) commonly used in ALM were largely replaced by index variables (e.g., slope position classification, topographic wetness index, etc.). The final models were classified into areas of high, medium, and low archaeological potential, then cross-validated against a reserved random dataset. Models were then compared using the Kvamme gain statistic and site to area frequency ratio. The 3m model demonstrated a significant improvement over the results obtained from the 10m model and the current probability model used in the study area. A number of factors including model resolution, statistical methodology, and the character of the independent and dependent variables all contributed to the increase in precision and accuracy. The incremental improvement in modeling efficiency demonstrated here will create time and cost saving in the management and preservation of cultural resources, and ultimately contribute to a better understanding of patterns of past human land use.

An Investigation Of Employment And Wage Distribution In The Construction Industry By Race/Ethnicity And Gender, Binit Kumar Shrestha

UNLV Theses, Dissertations, Professional Papers, and Capstones

One of the largest job providers in the U.S, is the construction industry, an industry that suffers from critical problems pertaining to a labor shortage. Yet the industry also struggles with insufficient interest and inconsistent participation from underrepresented demographic groups. To address the issue of workforce income inequality and bias, the industry must better understand the current situation regarding inequality; it needs to pinpoint some basic problems. To do so, analysts must scrutinize the following aspects: 1) the current differences within the construction workforce by race/ethnicity and gender with regards to the total employment and 2) the current disparity within …

Attitudes, Attachment Styles, And Gender: Implications On Perceptions Of Infidelity, Christian M. Stewart

UNLV Theses, Dissertations, Professional Papers, and Capstones

Understanding the impact infidelity has on individuals, couples, families, and societies has increasingly become a topic of interest over the last few decades. In recent years, scholars have sought to increase understanding of infidelity through investigating the relationship between infidelity and attachment theory. This research study examines the impact attitudes about infidelity, attachment styles, and gender have on the way in which individuals perceive infidelity. Data was gathered from 310 participants recruited from the University of Nevada, Las Vegas and social media. Participants were 18 years of age and older and were, at the time of the study, either in …

Average Cayley Genus For Groups With Two Generators Of Order Greater Than Two, Dawn Sturgeon

UNLV Theses, Dissertations, Professional Papers, and Capstones

Determining the orientable surfaces on which a particular graph may be imbedded is a basic problem in the area of topological graph theory. We look at groups modeled by Cayley graphs. Imbedding Cayley graphs with symmetry is done using Cayley maps. It is of interest to find the average Cayley genus for a particular group and generating set for the group. We consider the group known as the generalized quaternions with generating set ∆, where ∆ contains two generators with order greater than two. We find a formula for the average Cayley genus of the generalized quaternions. Moreover, we determine …

Lock-Free Self-Adjusting Binary Search Tree, Sachiko Sueki

UNLV Theses, Dissertations, Professional Papers, and Capstones

A binary search tree (BST) is a fundamental data structure for maintaining data in a way to allow fast search. As multi-core processors are widely used nowadays, such data structures require the ability to handle concurrent accesses to exploit the concurrent hardware. There are several algorithms on lock-based as well as lock-free BST with and without self-balancing. On the other hand, only a few reports can be found on lock-based self-adjusting BST. To the best of our knowledge, there are no algorithms for lock-free self-adjusting BST. Lock-free guarantees overall progress even if some processes fail, whereas lock-based algorithms fail to …

The Transformation Of American Federalism, 1848-1912, Lance Sorenson

UNLV Theses, Dissertations, Professional Papers, and Capstones

United States expansion following the Mexican-American War served as the catalyst for a reinvention of American Federalism. While much of the historiography traces the accretion of sovereign power in the national government to events caused by the divisions between northern states and southern states, there is an important and understudied East to West component of the process by which sovereign boundaries changed. The American West is a legal space where the hazily defined and capacious concept of federalism received fuller form and clearer definition. During the late nineteenth century and first few years of the twentieth century, the United States …

Violence In The Canyons: The Human Cost Of Raiding And Warfare In Northeastern Arizona (Ad 300-~1300), Caryn Elizabeth Tegtmeyer

UNLV Theses, Dissertations, Professional Papers, and Capstones

Canyon de Chelly sits on the Northeastern border of the Kayenta region in Arizona. Because of the position in which they sit, those who lived there likely lived a unique experience when compared to the rest of the Kayenta cultural tradition, of which they are considered a part. By examining the skeletal remains of the canyon occupants, this study is able to reconstruct the demographic profile (age and sex), aspects of health (pathology, stature), analysis of trauma, and aspects of labor (robusticity and entheses) to create the first, modern, complete skeletal analysis of remains recovered from Canyon de Chelly. This …

Case Studies Of Teach For America Teachers’ Teacher Identity Development In Relation To English Language Learners, Refika Turgut

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to examine the teacher identity development of Teach for America (TFA) teachers in relation to English language learners (ELLs) in the context of a semester-long teaching English as a second language (TESL) course. In addition, this study aims to explore primary considerations come into play in TFA teachers’ teacher identity development as novice teachers of ELLs. The theoretical lenses guiding this study are Wenger’s Community of Practice perspective and Positioning theory (Davies & Harré, 1990). A multiple-case design is employed to examine TFA teachers’ teacher identity in relation to ELLs. Data collection took place …

The Relationship Between Roles And Responsibilities Of Co-Teachers And Co-Teacher Self-Efficacy, Janet Van Heck

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study is a survey that was intended to measure the connection between what co-teachers actually do and what they think they should be doing as best practice. Second, it intended to study the roles and responsibilities that co-teachers report fulfilling. Finally, whether self-efficacy is a predictor of co-teacher roles and responsibilities is further reported.

Three hundred twenty co-teachers participated in the study: one hundred sixty special education and 160 general education teachers in a large urban school district in the southwestern United States. Bandura’s Teacher Self Efficacy Scale (1994) was used with a tool for co-teachers designed specifically for …

Understanding Stress Reactivity In Schizophrenia, Mary Vertinski

UNLV Theses, Dissertations, Professional Papers, and Capstones

The role of stress has long been recognized in schizophrenia; several theories have identified the role of stress as an important factor in the etiology of schizophrenia. A handful of studies have used laboratory psychosocial stressors to examine cortisol stress response in schizophrenia; the results obtained have consistently suggested that the stress response is attenuated in people with schizophrenia. Present study set out to examine stress responsivity in schizophrenia relative to healthy controls. A laboratory stress test was used to investigate cortisol response, heart rate and task appraisal in a sample of 17 healthy controls and 16 men diagnosed with …

Setting The Childless Free: An Ethnographic Study Of The Practice Of The Childfree Identity, Shelly Volsche

UNLV Theses, Dissertations, Professional Papers, and Capstones

Heeding Sherry Ortner’s call to turn anthropological analysis inward, toward one’s own culture, the following dissertation seeks to understand the identity and practice of the voluntarily childless (hereafter “childfree”) movement in the United States. How do these individuals practice their identity, and how does the identity of “childfree” interact with other roles in their lives? How do they build meaning in a society that emphasizes children as a hallmark of adulthood? What other outlets do childfree individuals have for the “nurturing” tendencies of our species?

Combining sociohistoric analysis with identity and feminist theories, I embarked on nearly two years of …

Emerging Infectious Disease And The Imperiled Relict Leopard Frog, Anthony Wayne Waddle

UNLV Theses, Dissertations, Professional Papers, and Capstones

The disease chytridiomycosis, caused by the aquatic fungal pathogen Batrachochytrium dendrobatidis (Bd), has emerged as a major contributing factor for worldwide amphibian declines. Although relatively recently described, the impacts from the disease this pathogen causes have been definitively tied to amphibian declines, including some that occurred decades ago. In some cases, declines of individual species occurred with little documentation and are thus poorly understood. The relict leopard frog (Rana onca = Lithobates onca) has experienced such a decline and by the latter part of the 20th century only occurred in two general areas in southern Nevada. Recent research has found …

The Relationship Between African- American Male Education And Employment Opportunities Through The Lenses Of Critical Race Theory And Stereotype Threat In The Historical Context Of The 1965 Moynihan Report, Robert Paul Walker

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study is to examine the connection between education and employment outcomes for African American males through the dual lenses of Critical Race Theory (CRT) and Stereotype Threat (ST) in the historical context of the 1965 Moynihan Report. A qualitative case study design allowed for the collection of rich data through in-depth interviews designed to elicit the Black male participants’ perspectives and lived experience of education and employment. For more than fifty years, the trajectory of African American male education and employment has been a negative one. This study documented, in their own voice, the African American …

Race, Resilience, And Resistance: A Culturally Relevant Examination Of How Black Women School Leaders Advance Racial Equity And Social Justice In U.S. Schools, Tonya Evette Walls

UNLV Theses, Dissertations, Professional Papers, and Capstones

This culturally relevant qualitative examination of the leadership of Black women educational leaders (BWEL) committed to advancing a social justice leadership agenda within the contested spaces (Stovall, 2004) comprising United States (U.S.) P-12 schools, employs an African centered emancipatory methodology (Kershaw, 1990, 1992; Tillman, 2002), situated in a conceptual framework grounded in the research on applied critical leadership (Santamaria, 2013). It examines, highlights, celebrates, and makes transparent, the unique leadership of BWEL. Engaged to rebuke the silencing and marginalization of women educational leaders of color in the educational leadership discourse, this study bridges engages a multiple case study approach, phenomenological …

Development And Validation Of A Brief Assessment Of Social Cognitive Abilities, Ryanna Zenisek

UNLV Theses, Dissertations, Professional Papers, and Capstones

It has been consistently found that individuals with schizophrenia exhibit impairments across various social cognitive domains, including emotion processing, social perception, and theory of mind. These deficits have been found across illness stages and cannot be accounted for by clinical symptomatology or neurocognitive skills. Further, while it has been well established that there is a link between cognition and functional outcome, social cognition has been found to be uniquely related to functional impairment in the disorder. Despite this evidence, the field is currently lacking efficient ways to identify and characterize these deficits in clinical settings. The Brief Test of Social …

Dietary Intake And Energy Expenditure Of Pararescuemen During Routine Training, Andrea Woita

UNLV Theses, Dissertations, Professional Papers, and Capstones

Pararescuemen are one group of Air Force Special Operations Forces (SOF) who engage in vigorous physical training to achieve mission readiness. This type of training requires high energy expenditures and matching dietary intake to support basic physiological needs and to meet performance demands. However, few studies have investigated the energy expenditure and dietary intake of SOF and none have specifically examined these behaviors in Pararescuemen. The goal of this investigation was to determine the energy expenditure and dietary intake of Pararescuemen during routine training - a period when these operators receive supervision and guidance for performance improvements, recovery, and career …

Special Section On Wireless Emc And Wireless Ota Measurements, Jun Fan, Y. Qi

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

The Art Of Silence., Lydia Anne Kowalski

Electronic Theses and Dissertations

This dissertation argues that the role of silence as essential to experience the full aesthetic beauty of art in a museum setting. Museums have changed their focus due to socio-economic and financial pressures. They have changed from silent “temples” for art conservation and exhibition to places for interactive art education, entertainment, and social gathering. The results of these changes have been both positive and negative. Attendance has increased, enhancing the museum experience, engaging more diverse audiences in museum activities, and dispelling the “elitist” image of the museum. These changes, however, have resulted in the loss of a silent space to …

"It Teaches Them To Have A Conversation In The Real World" : An Analysis Of How Identity Performances Shape Classroom Discussions., Ashley Lauren Shelton Arnold

Electronic Theses and Dissertations

Although discussion has long played a role in classroom learning, recent focus on moving discussion away from the evaluative and toward the dialogic is key to understanding how discussion can be driven by multiple, shared understandings. Adopting a sociocultural perspective, this dissertation explores the ways in which identity performances shape one teacher and his students’ participation in classroom discussions. The theoretical framework guiding this study draws on the relationship between discourse and identities construction, with further attention given to improvisations of identities, figured worlds, and the ways in which power shapes discourse. This dissertation argues that performed identities shape the …

Trinity Part One : Food Of The Gods., Thomas Edward Olges

Electronic Theses and Dissertations

A novel of supernatural horror, Trinity begins in the wake of a catastrophe. A young woman, divinely pregnant, has lost both her life and her son in the process of delivery. Three people dear to her—her fiancé, her brother, and a close friend—have found themselves irreparably altered by the experience. Their bodies changed and reality warping around them, the three set off across the country in an attempt to prevent other incursions of the miraculous into our reality. This thesis includes the novel’s introductory scene and its first principle section, “Food of the Gods.”

Greater London In The 21st Century : Assessing Coastal Flooding Mitigation Preparedness And Regional Population Risk In The Face Of Projected Sea-Level Rise., Nathan K Wright

Electronic Theses and Dissertations

Recent projections of +6-9m sea-level rise (SLR) over the next several decades present many social challenges for coastal regions during the 21^st century. These projections were applied to Greater London, UK as areal interpolated historical census data was overlaid on a 50m DEM alongside a polyline projection of the Thames Barrier. Population was projected to milestones of 2041, 2071, and 2101 using a capped, aggregated growth rate for each polygon while SLR was simulated for 1m, 5m, and 9m scenarios. The Thames Barrier maintained integrity for 1m and 5m scenarios but was breached at 9m. Population continued to increase …

An Investigation Of Relationship Correlates And Predictors Of Cultural Adjustment Among Missionaries., Sarah Warren

Electronic Theses and Dissertations

While research on the cultural adjustment of expatriates has existed for decades, information related to the cultural adjustment of missionaries is considerably lacking (Kimber, 2012). Information on missionary cultural adjustment often has been extrapolated from the greater expatriate population, in spite of differences existing between missionaries and other expatriates (Navara & James, 2002; 2005). This study examined the extent to which missionary relationships (with God, individuals from one’s host culture, individuals from one’s home culture, and other missionaries) correlate with and predict cultural adjustment among missionaries. Participants were recruited from the Church of the Nazarene’s Global Mission Department to complete …

James Franklin Bell : Hard War In The Philippines., Daniel Michael

Electronic Theses and Dissertations

This thesis surveys the military history of the Philippine-American War of 1899-1902. In particular, this thesis looks at that war through the lens of hard war as a way of war. It begins with an introduction to hard war as a concept and a historiography of the Philippine-American War and continues with an overview of the events leading up to the war. The first two chapters deal with the wider role of the U.S. Army during the war, while the third chapter examines the role of James Franklin Bell, and American officer, and his command of the Third Separate Brigade …

The Otaku Phenomenon : Pop Culture, Fandom, And Religiosity In Contemporary Japan., Kendra Nicole Sheehan

Electronic Theses and Dissertations

The focus of this dissertation centers on the otaku subculture and their subsequent incorporation of Japanese religious elements into their consumption of Japanese popular culture. This phenomenon highlights the intersections of popular culture and religion in Japan, which is emerging in religious sites. Shintō shrines and Buddhist temples are incorporating popular culture as a means to maintain relevancy, encourage growth of parishioners, and raising revenue by capitalizing on the popularity of manga and anime. The relevance of this research connects to the continued impact of Japanese popular culture through globalization. The first chapter provides a theoretical background examining this socio-religious …