Digital Commons Network^™

Conversational Movement Dynamics And Nonverbal Indicators Of Second Language Development: A Microgenetic Approach, Kristine Marie Bragg

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation study extends on current understandings of gesture and embodied interaction with the eco-social environment in second language development (SLD) while introducing new aspects of movement analysis through dynamical modeling. To understand the role of embodiment during learning activities, a second language learning task has been selected. Dyads consisting of a non-native English-speaking student and a native English-speaking tutor were video recorded during writing consultations centered on class assignments provided by the student. Cross-recurrence quantification analysis was used to measure interactional movement synchrony between the members of each dyad. Results indicate that students with varied English proficiency levels synchronize …

Exploring Relations Between Motivation, Metacognition, And Academic Achievement Through Variable-Centered, Person-Centered And Learning Analytic Methodologies, Wonjoon Hong

UNLV Theses, Dissertations, Professional Papers, and Capstones

The three studies that comprise this dissertation examine relations between student characteristics, motivations, metacognitive learning processes, and academic achievement. Methodologically, the dissertation demonstrated the potential of multiple types of approaches

and data resource types. By employing multiple approaches including variable-centered, person-centered, and learning analytics, researchers can understand learning processes from various angles. In addition, through this triangulation by multiple types of methodological approaches, educational theories could be more thoroughly verified and supported by various empirical findings. Multiple types of data resources are related to analytical methods.

The purpose of the first paper was to examine relations between achievement goals and …

Factors That Impact Direct Democracy And Voter Turnout: Evidence From A National Study On American Counties, Michael Joseph Biesiada

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation examines factors that impact citizen initiatives and voter turnout. The dissertation contains two parts that build upon each other with fitting theoretical frameworks. The first part investigates the decision for a county government to permit citizen initiatives. This part applies new institutionalism theory as a framework to examine county governance, autonomy, and decision-making. County governments play a vital role in American politics, yet little is known about why some counties permit citizen initiatives while others do not. I address a gap in the literature that focuses on policy outcomes that vary at the county-level due to election laws. …

Tall Tales Of Danger And Security: How A Critical Human Security Approach Can Address Major Contradictions Revealed Through A Critical Narrative Analysis Of Dominant U.S. Security Strategies, Stephen Schneider

Master's Theses

Over many generations, humans have developed many perspectives and practices regarding the best ways to recognize and address what they perceive to be dangerous. Stories are used to help shape and narrate perceptions about the world, and they serve to pass on vital information that impacts how a society responds to threats and vulnerabilities. These narratives of danger and security are subjective to the experiences and political intentions of society, and therefore in many ways are partial and biased in their assessments and policies. This results in flawed security practices that may actually exacerbate threats or create new insecurities. What …

Looming Large: An Analysis And Evaluation On The Growth Of The Urban Informal Economy In Nigeria., Tamunotonye A. Sekibo Iii

Master's Theses

The Informal Economy looms large! The importance, magnitude and significance of the vast range of socio-economic activities taking place within and across diverse spaces of informality, particularly in nations situated in the Global South; can neither be overstated or underestimated. According to the International Labor Organization (ILO, 2018 p.v), approximately 60% of the world’s employed population - 2 billion people - obtain their source of income through their engagement in informal spaces.

Biosensing By “Growing” Antennas And Error-Correcting Codes, Mingquan Yuan

McKelvey School of Engineering Graduate Student Theses & Dissertations

Food-borne disease outbreaks not only cause numerous fatalities every year but also contribute to significant economic losses. While end-to-end supply chain monitoring can be one of the keys to preventing these outbreaks, screening every food product in the supply chain is not feasible considering the sheer volume and prohibitive test costs. Fortunately, two converging economic trends promise to make this end-to-end supply chain monitoring possible. The first trend is that passive radio-frequency identification (RFID) tags and quick response (QR) codes are now widely accepted for food packaging. The second trend is that smartphones are now equipped with the capability to …

Towards Engineering Advanced Nanomaterials: Elucidating Fundamental Particle Behavior In Water And Critical Sorption Dynamics, Changwoo Kim

McKelvey School of Engineering Graduate Student Theses & Dissertations

As advanced nanomaterials, inorganic-organic nano composites have received great interest as potential platform (nano) structures for sensor, catalyst, sorbent, and environmental applications. Here, my Ph.D. research has focused on the design, synthesis, and characterization of advanced water-stable engineered metal-oxide nanoparticles functionalized by organic frames for environmental applications. For the environmental applications, I have evaluated particleoptimized sorption processes for the remediation and separation of arsenic, chromium, and uranium under environmentally relevant conditions. More specifically, I have explored the critical role of organic coating on sorption mechanisms and performances using engineered iron oxide -based, manganese oxide -based, and manganese ferrite -based (core) …

Multifunctional Nanocomposites Based On Bacterial Cellulose, Qisheng Jiang

McKelvey School of Engineering Graduate Student Theses & Dissertations

Cellulose is biodegradable, renewable, and abundant in nature thus cellulose (or paper)-based products can be inexpensively produced and recycled. Among cellulosic materials, bacterial nanocellulose (BNC) draws a special research attention due to the inherent three-dimensional nanofibrous structure, excellent mechanical flexibility, high purity and well-defined surface chemistry, and cost-efficient, scalable and environment-friendly synthesis. BNC can be biosynthesized by Gluconacetobacter xylinus, which is the most characterized BNC producer among various microorganisms. BNC is composed of highly pure cellulose nanofibrils, produced from well-defined dextrose through biochemical steps and subsequent self-assembling of the secreted cellulose fibrils which has the dimension ranges from 25 to …

Ming China As A Gunpowder Empire: Military Technology, Politics, And Fiscal Administration, 1350-1620, Weicong Duan

Arts & Sciences Graduate Student Theses and Dissertations

This dissertation explores the transformation of Ming China in the gunpowder age. Focusing on the relation between military technology, politics, and fiscal administration, it closely traces the change of the Ming state in association with the gunpowder revolution. Two aspects of institutional change receive special attention. The first aspect is the formation of an absolute authority in the Ming period, a development exhibiting many parallels with the absolute monarchies of other major gunpowder states in Europe and the Islamic world. The second is the modification of the Confucian bureaucratic government. The revolutions in gunpowder technology had a complex impact on …

Fluid Structure Interaction Study Of The Obstructive Sleep Apnea And Surgical Treatment Using Suture-Patch Device On The Patient’S Tongue, Yang Liu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Up to 14% of the U.S. population is estimated to have obstructive sleep apnea (OSA) related to obesity, and there is increased incidence occurring worldwide. While treatment with continuous positive airway pressure (CPAP) resolves airway obstruction, patient compliance is relatively low. Alternative interventions are available to treat OSA patients; however, their outcomes have had variable results. For example, current technologies have demonstrated an inability to define and treat the specific anatomical site(s) causing the obstruction, resulting in suboptimal modifications of the airway and poor control of OSA.

In the current study, a three-dimensional (3-D) fluid-structure interaction (FSI) numerical simulation has …

Variable Transition Time Inverters In A Digital Delay Line With Analog Storage For Processing Fast Signals And Pulses, James Kenton Mellott

UNLV Theses, Dissertations, Professional Papers, and Capstones

As the electronics industry moves forward there is an increasing need to process information faster and more accurately. High speed signals are used in scientific instrumentation, range finding devices, radar applications, and electro-optical interfaces. High-speed state of the art analog-to-digital converters are required to process these signals in real time. High frequency signals or very fast pulses are not able to be processed accurately due to either Nyquist-rate limitations or practical power consumption limits. For applications where signals are transient in nature and design size and power consumption are major factors, the proposed Variable Fast Transient Digitizer (VFTD) will be …

The Effectiveness Of State Ethics Commissions On Curbing Corruption And The Effect Of Corruption On State Economic Performance, Anthony J. Prato

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation investigates the effectiveness of anti-corruption policies implemented across the United States that significantly reduce public sector corruption. In addition to the normative desire to combat corruption, it documents, the economic impact that corruption has on each state's per capita gross domestic product. To investigate public sector corruption articles between the years 2010 – 2015were reviewed for news stories that report on public sector corruption at the state level and below. The practical implications of this dissertation, if incorporated into a state level anti-corruption policy, could be used to reduce public sector corruption and increase that states' economic health. …

Human Thermal Comfort In Transition Space, Asawari Anil Pawar

UNLV Theses, Dissertations, Professional Papers, and Capstones

ABSTRACT

HUMAN THERMAL COMFORT IN TRANSITION SPACES

Objective: To evaluate and identify the relationship between personal factors and the climatic conditions that influence the human thermal comfort in transition spaces and suggest solutions for adaptation of the built environment, that would encourage active and healthy living in the tourist as well as local community.

Background:

By 2050, there is a prediction that two-thirds of the world population will be living in urban areas, which would add more than 2.5 billion people living in cities (Melnikov et al., 2017). Since Las Vegas is one of the fastest growing cities in Nevada, …

The Impacts Of Acculturation Patterns And Processes On Immigrants' Success In Higher Education: A Multiple Case Study Of 1.25-Generation Third-Wave Iranian Immigrants To The United States, Fereshteh Rezaeian

UNLV Theses, Dissertations, Professional Papers, and Capstones

The United States of America is inherently a pluralistic society composed of various groups of immigrants. As scholars (Camarota & Zeigler, 2016; Gibson, 1998) state, the number of immigrant children accounts for 20% of the total number of school-age children. Despite all attempts to provide the best education to such a great number of immigrant students, the achievement gap between immigrant and non-immigrant students still exists (Baum & Flores, 2011; Rong & Preissle, 2008). Some scholars (e.g., Ramos & Sanchez, 1995) have proposed that the key factor for immigrants to be successful in the United States is to adapt to …

Prokaryotic Diversity And Aqueous Geochemistry Of Subsurface Environments Of The Death Valley Regional Flow System, Joshua David Sackett

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation summarizes over four years of effort towards the completion of a Ph.D. in Biological Sciences. The work presented in this document covers a broad range of topics, but a central unifying theme is prokaryotic life in the continental subsurface. The work presented in each chapter relied heavily on cultivation-independent methods for assessing prokaryotic communities, including prokaryotic community structure reconstruction from high-throughput sequencing of 16S rRNA gene libraries and single-cell genome analysis of novel uncultivated bacteria.

Chapter 2 examines the aqueous geochemistry and prokaryotic diversity of Devils Hole, a cavernous limnocrene and sole natural habitat for the critically endangered …

Cocoa, Postprandial Lipoproteins, And Inflammation In Type 2 Diabetes: A Secondary Data Analysis, Rickelle Tallent

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Type 2 Diabetes (T2D) is associated with dyslipidemia and chronic low-grade inflammation, which greatly increases the risk of cardiovascular disease (CVD) in this population. Hyperlipidemia and inflammation in the postprandial state substantially contribute to atherosclerosis development and CVD risk, and have shown to be exacerbated by high-fat meals. Dietary cocoa is a rich source of flavanols that is associated with favorable effects on cardiovascular health, such as improvements in the lipid profile and chronic inflammation, in non-diabetic adults.

Objective: To conduct a secondary data analysis using unpublished data from a previously conducted clinical study to determine whether acute cocoa …

The Roles Of Biophilic Attitudes And Auditory Stimuli Within Attention Restoration Theory, Jason B. Boggs

UNLV Theses, Dissertations, Professional Papers, and Capstones

Attention Restoration Theory indicates that interacting with nature allows one’s fatigued, directed attention to be restored. This effect has been documented and produced through directed interaction with nature, such as a walk in the park, as well as through indirect interactions (e.g., photographs). The current dissertation was designed to: 1) investigate whether and how biophilic attitudes affect the attention-restoring effects incurred from interactions with nature, and 2) extend the research on ART by assessing the impact of nature-related audio stimuli. A total of 184 participants completed an assessment of biophilic attitudes, engaged in attention fatiguing exercises, and participated in one …

Mob-Ndr Kinase Signaling Components Are Required For Epithelial Tube Formation In The Drosophila Follicular Epithelium, Juan Carlos Duhart

UNLV Theses, Dissertations, Professional Papers, and Capstones

A major goal of developmental biology is to understand how a single fertilized cell can give rise to the many functional tissues and organs, of specific sizes and shapes, that make up the adult body plan. Over the last 25 years, developmental geneticists have uncovered much concerning the cell-to-cell communication systems that are necessary to build complex tissues and organs. For example, throughout development, cells communicate with their neighbors using specialized signaling molecules. These signals are instructive and provide “signal-receiving” cells with information about space and time. That is, signal-receiving cells “learn” precisely where they are located, and, how far …

Mechanisms For The Incorporation And Distribution Of Radionuclides In Near-Surface Fallout, Marc Alan Fitzgerald

UNLV Theses, Dissertations, Professional Papers, and Capstones

Fallout is the radioactive glass formed from a mixture of vaporized anthropogenic materials with proximate environmental material. These glassy byproducts constitute a compositional record of environmental materials such as soil and vapor precursors that are responsible for chemical heterogeneity in the glasses. The work of this dissertation is to untangle these different sources of compositional heterogeneity, distinguishing low-abundance vaporized anthropogenic-rich material from natural compositions, in order examine soil behavior and chemical evolution during fallout formation. Unfortunately, mixing convolutes the multivariate elemental relationships in these melts due to overlapping element abundances that might distinguish different source materials and chemical behaviors, making …

A Phenomenological Study On The Professional Development Of African American Male Administrators At Predominately White Post-~Secondary Institutions, Arnold Shmorn Bell

UNLV Theses, Dissertations, Professional Papers, and Capstones

As of today, African Americans continue to face a daunting endeavor when seeking to become executive administrative leaders at predominately White post-secondary institutions, even though, according to Tillman (2001), “Mentoring was identified as a technique to assist the professional advancement of African American faculty. In doing so, their numbers will increase at predominantly White institutions” (p. 295). Literature steadily indicates that mentorship contributes to one’s career development in the post-secondary environment. The influential aspects of mentorship on one’s professional development is supported by numerous studies that examines mentoring relationships across various academic disciplines and businesses in corporate America (Brown, 2005). …

Supranational Identity Politics: Sovereignism In The Eu, Emilio Jacintho

UNLV Theses, Dissertations, Professional Papers, and Capstones

The implementation of identity politics policies conceived at a supranational level appears to motivate the coordination of populist movements, the radicalization of their discourses, and an increasing resentment towards minority groups. I investigate the reaction of populist sovereignist political movements, among recently admitted EU member states, to the implementation of European Union policies that involve the positive discrimination of minority groups and mandated refugee relocations. The implementation of such policies seems to have contributed to the resentment toward policy-favored minorities, the increase of anti-immigration values, the success of extremist political expressions, and the mistrust of political institutions and traditional parties. …

The Role Of Fibrillin-1 In Eye Development And Disease, Wendell Brooks Jones

Arts & Sciences Graduate Student Theses and Dissertations

The ciliary zonule of the human eye consists of a circumferential array of fibers that connect the ocular lens to the nonpigmented ciliary epithelium (NPCE) located at the inner wall of the eye. Zonular fibers consist of bundles of beaded filaments called microfibrils. Microfibrils are major structural elements of the extracellular matrix and are present in pure form in the ciliary zonule. Microfibrils are composed principally of fibrillin-1 (FBN-1); a large extracellular matrix glycoprotein. In humans, mutations in FBN1 underlie Marfan syndrome; a pleiotropic connective tissue disorder that profoundly affects the eye. Ocular manifestations include ectopia lentis (dislocated lenses), cataracts, …

Elevated Temperature Progressive Damage And Failure Of Duplex Stainless Steel, Darren P. Luke

Civil Engineering ETDs

Ductile failure of metals has been the focus of research efforts within academia and industry for many years since it is tremendously important for understanding the failure of structures under extreme loading conditions. However, limited research has been dedicated to elevated temperature ductile failure, which is critical for evaluating catastrophic events such as industrial, structural or shipping vessel fires. A detailed investigation was conducted on the structural response of Duplex Stainless Steel at elevated temperatures. The temperature dependence of elastic modulus, yield strength, ultimate strength, and ductility was measured up to 1000°C and a continuum damage plasticity model was developed. …

Genetic Basis Of Thermal Divergence In Saccharomyces Species, Xueying C. Li

Arts & Sciences Graduate Student Theses and Dissertations

The genetic architecture of phenotypic divergence is a central question in evolutionary biology. Genetic architecture is impacted by whether evolution occurs through accumulation of many small-effect or a few large-effect changes, the relative contribution of coding and cis-regulatory changes, and the prevalence of epistatic effects. Our empirical understanding of the genetic basis of evolutionary change remains incomplete, largely because reproductive barriers limit genetic analysis to those phenotypes that distinguish closely related species. In this dissertation, I use hybrid genetic analysis to examine the basis of thermal divergence between two post-zygotically isolated species, Saccharomyces cerevisiae and S. uvarum. S. cerevisiae is …

The Role Of Apolipoprotein E In Regulating Tau Pathogenesis And Neurodegeneration In A Tauopathy Mouse Model, Yang Shi

Arts & Sciences Graduate Student Theses and Dissertations

APOE4 is the strongest genetic risk factor for late-onset Alzheimer's disease (AD). APOE4 increases brain amyloid-β (Aβ) pathology relative to other APOE isoforms. However, whether APOE independently influences tau pathology, the other pathological hallmark of AD and other tauopathies, or tau-mediated neurodegeneration, is not clear. By generating P301S tau transgenic mice on either a human APOE knock in (KI) or APOE knockout (KO) background, we show that the presence of human APOE, regardless of APOE isoforms, leads to various degrees of brain atrophy in 9-month old P301S mice, whereas APOE ablation strongly protects against neurodegeneration. In particular, P301S/E4 mice develop …

Unsettling Geographies: Primitivist Utopias In Queer American Literature From Walt Whitman To Willa Cather, Benjamin Meiners

Arts & Sciences Graduate Student Theses and Dissertations

In “Unsettling Geographies: Primitivist Utopias in Queer American Literature from Walt Whitman to Willa Cather,” I argue that the colonial discourse of primitivism played a central role in the queer literary imaginaries of both canonical and non-canonical U.S. authors. Building on the work of historians of sexuality who trace the complex development of the twentieth-century homo-/hetero- binary, I show how literary works produced in this historical moment—roughly 1860 to 1925—explored and in some instances even advocated alternative queer modes of citizenship and erotic imagination and practice. Focusing on the works of Walt Whitman, Emily Dickinson, Charles Warren Stoddard, and Willa …

Neural Mechanisms Of Drosophila Circadian Rhythms, Xitong Liang

Arts & Sciences Graduate Student Theses and Dissertations

Animals show circadian rhythms in a variety of physiological functions and behaviors. In Drosophila melanogaster, behavioral rhythms are driven by circadian clock genes that are oscillating in ~150 circadian pacemaker neurons. To explain how circadian neurons encode time and regulate different behavioral rhythms, I performed 24-hour in vivo whole-brain calcium imaging using light-sheet microscopy. First, I found that different groups of circadian neurons show circadian rhythms in spontaneous neural activity with diverse phases. The neural activity phases of the M and E pacemaker groups, which are associated with the morning and evening locomotor activities respectively, occur ~4 hours before their …

Stability Of A Spinning Triangle Tethered Spacecraft System In A Circular Orbit, Matthew James Heitstuman

Mechanical Engineering ETDs

Equations of motion are derived for a spinning triangle tethered spacecraft system and are used to analyze the stability of such systems. Floquet theory is applied to the linearized, periodic coefficient, equations of motion to analyze spin stability as a function of triangle geometry and the average spin rate of the satellite relative to the angular velocity of the spacecraft orbiting around a central body. The results of the Floquet analysis show that spin stability is achievable for many combinations of spacecraft geometry and spin rate. Spacecraft engineers or operators for a triangle-shaped tethered spacecraft can use this information for …

The Role Of Information Literacy In The Actualization Of Healthy Living: A Case Study Of Abia State, Juliana Obiageri Akidi Phd, Cln

Library Philosophy and Practice (e-journal)

The study examines the role of information literacy in the actualization of healthy living in Nigeria, with a special focus on Abia State. Information literacy is viewed as the ability to recognise the need for information, identify and locate appropriate sources of information, access the information, evaluate and use it effectively. Information literacy empowers people to have skills that will assist them to become independent lifelong learners, with better decision making abilities, especially in healthy living. Healthy living is defined as maintaining a state of complete physical, mental, and social well-being, which is not necessarily devoid of disease or infirmity. …

Tangibility And Symbolism Along Historic Highway 66 In Albuquerque, Donatella Davanzo

American Studies ETDs

This dissertation is an interdisciplinary exploration of Highway 66 heritage in order to understand what makes the historic American route distinctive in the contemporary capitalist scenario. Although deterioration of the road is evident, it continues to epitomize an historic American infrastructure as well as a fascinating conceptualization of the United States in the American imagination and in the international consciousness. Historical evidence indicates that the formation of Highway 66 largely depended on a conjuncture of political, cultural, and socio-economic factors under capitalism and institutional forces and ideological principles of Manifest Destiny and American Exceptionalism. As an incarnation of these relationships …