Digital Commons Network^™

Ultrafast Dynamics Of Two-Dimensional Electron Systems, Randy Michael Sterbentz

UNLV Theses, Dissertations, Professional Papers, and Capstones

On-chip terahertz time-domain spectroscopy (THz-TDS) is a technique useful for measuring the ultrafast electrodynamics of two-dimensional (2D) electronic systems. Charge carrier collisions occur on the sub-picosecond time scale, and strongly correlated electron interactions (such as superconductivity) typically have energies on the order of milli-electron-volts. These phenomena fall within the terahertz bandwidth, which has historically been difficult to access. Commercial electronics operate with transistors capable of switching rates of around 100 GHz, while small band gap semiconductors (like InGaAs) can detect light down to 0.75 eV (180 THz). When combined with the difficulty of measuring 2D layered materials, with lateral sizes …

Quantum Sensing Of Magnetic And Thermal Fields Using Nitrogen-Vacancy Centers On Spoof Surface Plasmon Waveguides, Maxwell Stonham

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nitrogen-vacancy (NV) centers in nanodiamonds are solid-state quantum defects capable of detecting magnetic fields and temperature at the nanoscale with high spatial resolution and optical addressability at room temperature. Their spin-dependent fluorescence enables optically detected magnetic resonance (ODMR), a technique widely used for quantum sensing. However, enhancing optical readout efficiency remains a critical challenge for scalable integration and various methods can be used to improve this.

This thesis explores a hybrid quantum sensing platform that integrates NV-based sensing with spoof surface plasmon waveguides designed to enhance optical excitation and emission efficiency through localized spoof plasmon modes supported by subwavelength corrugated …

A Comparison Of Airborne Tree Pollen In The Las Vegas Valley From 2017 – 2021, Asma Tahir

UNLV Theses, Dissertations, Professional Papers, and Capstones

Airborne pollen are a predominant cause of asthma, allergic disease, and respiratory infections. The strong allergenic potential of tree pollen is of a public health concern. Several allergenic trees grow in the Mojave Desert, but not all are native to the region. Concentrations of airborne tree pollen are affected by atmospheric, environmental, ecological, and geospatial factors. Previous research has reported high tree pollen concentrations in the Las Vegas Valley, but long-term comparison studies are lacking. This study measured and compared tree pollen concentrations from five different collection stations in Las Vegas. Pollen samples collected from January 1, 2017, to December …

Integrating Classical Singing Techniques To Aid Natives In Performing Traditional Tongan Folk Songs Of The Late Queen Sālote Tupou Iii, Pauline 'Ofa Vaitāfā Tamale

UNLV Theses, Dissertations, Professional Papers, and Capstones

This document introduces a structured, classical vocal approach to equip native singers with healthier performance techniques and enable anyone in the music world to perform the art songs derived from the poetry and compositions of Queen Sālote Tupou III. The objective of this project is to provide performers, particularly those with a native proficiency, with classical techniques to perform this music with vigor while circumventing vocal fatigue caused by the linguistic, dialectal, and cultural demands inherent in the repertoire. Queen Sālote Tupou III (1900–1965) reigned for nearly 50 years – the longest of any Tongan monarch – and left an …

Modeling The Mojave: A Multiphase, Mixed Methods Phenomenological Investigation Of Novice Understanding Of A Complex Ecological System, Nicole Juliana Thomas

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research explores early college science majors’ conceptions of the Mojave Desert ecosystem as a complex system. A multi-level, explanatory sequential mixed methods design was employed to study college science majors’ understanding of the Mojave Desert ecosystem to better inform science pedagogy. The first level, the quantitative phase of the study, consisted of developing a mathematical representation of twelve ecosystem variables present within the Mojave Desert. The second level, the qualitative phase of the study, consisted of phenomenological semi-structured interviews with 23 early college science majors. The findings of this research suggest that the Mojave Desert operates as a complex, …

Deaf College Students’ Lived Experiences In Pk-16 Education: A Deaf Crit-Informed Qualitative Study, Bridget Catherine Taylor

UNLV Theses, Dissertations, Professional Papers, and Capstones

This qualitative study focused on Deaf, Hard-of-Hearing, and orally Deaf college students, examining Deaf education from the perspective of linguistic and cultural minority students. The study offers theoretical perspectives for researchers, practitioners, and policymakers by examining the lived experiences of students who took part in Deaf education in the United States from PK–16. Deaf Critical Theory (DeafCrit) was the theoretical framework used to analyze the qualitative data.

Beyond Barriers: Improving Employment Outcomes For Young Adults On The Autism Spectrum, Kendra L. Cope

UNLV Theses, Dissertations, Professional Papers, and Capstones

Young adults with autism spectrum disorder (ASD) continue to face persistent barriers to employment, often stemming from challenges in communication, adaptability, and multitasking. Virtual reality (VR) has emerged as a promising tool to strengthen these employment skills through immersive, low-stress practice. This study evaluated a VR-based intervention using Floreo VR modules, guided practice, and performance feedback to enhance job readiness among high school students with ASD. A multiple-probe design across three skill domains: multitasking, handling interruptions and changes, and workplace communication to examine skill acquisition and maintenance with three students with ASD aged 16–18. Data from task-analysis checklists, interobserver agreement …

Intervention Outcomes Of A Family-Based Intervention: A Case Review Of An Asian American Adolescent At Clinical High Risk For Psychosis, Monica Elizabeth Done

UNLV Theses, Dissertations, Professional Papers, and Capstones

Schizophrenia is a lifelong and debilitating condition that occurs in approximately 1% of individuals globally and includes positive, negative, disorganized, and other symptoms that interfere with functioning. The onset typically happens in adolescence, and recently, there has been an emphasis on finding individuals who are at high clinical risk for developing psychosis (CHR-P). Additionally, there has been a focus on creating intervention programs that may treat symptoms in the early phases of illness and decrease the likelihood of developing a schizophrenia spectrum and other psychotic disorders (SSD). Furthermore, there is limited research on the potential impacts of cultural identity on …

Towards Spatial Inversion Of Aerial Gamma-Ray Survey Data For Measurement Of Naturally Occurring Radioactivity, Daniel A. Haber

UNLV Theses, Dissertations, Professional Papers, and Capstones

Aerial gamma-ray surveying (AGRS) is used in geologic and environmental contexts to provide data on the surface spatial distribution of naturally occurring radioactive material (NORM) or other gamma-ray-emitting isotopes. The standard data reduction workflow for AGRS data involves a process whereby pointwise gamma-ray spectral data are denoised, corrected for numerous sources of background radiation and aircraft height, and are finally converted to physical values by empirical conversion factors. The reduced pointwise data are then typically spatially interpolated to form a continuous surface map.

This dissertation introduces and explores a novel spatial inversion method for reduced AGRS data that considers aircraft …

A Phenomenological Study Of The Experiences Of Adolescents With Emotional Behavioral Disorders In High School, Melissa Lawson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Adolescents with emotional and behavioral disorders (EBD) face significant challenges in forming and maintaining peer relationships, yet their voices and lived experiences remain largely absent from the research literature. This phenomenological study explored how high school students with EBD perceive the impact of peer relationships on their academic, social, and emotional experiences at school. Using Moustakas's (1994) modification of the StevickColaizzi-Keen method, the researcher conducted in-depth semi-structured interviews with seven high school students (ages 15-18) who had received special education services under the EBD eligibility category for 5 to 10 years in a large, urban southwestern school district.

Five universal …

Reconstructing Central American Hydroclimate Changes Across Time From Isotopic Signatures In Modern And Paleo-Rainfall Records, Giuseppe Lucia

UNLV Theses, Dissertations, Professional Papers, and Capstones

Tropical monsoon rainfall is a key component of Earth’s climate system and supports the livelihood and economy of billions of people. Yet, projections of future monsoons remain highly uncertain, particularly in regions with distinct physiography and complex land-ocean-atmosphere interactions like Central America, where long and continuous high-resolution paleoclimate data to test climate model simulations are still limited. This series of studies aims to reconstruct monsoon dynamics and underlying forcing controls in Central America on multiple timescales by the analysis and integration of stable isotope data in modern and paleo-rainfall records from Guatemala.

In Chapter 2, I present a daily-resolution, two-year-long …

Ankimedbench: Evaluating Hierarchical Medical Knowledge In Language Model Embeddings, Neel Patel

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite achieving over 90% accuracy on medical benchmarks, recent studies show physicians cannot effectively leverage language models to improve clinical reasoning. Current benchmarks test isolated factual recall, but clinical practice requires hierarchical navigation through diagnostic categories—starting broad and narrowing systematically from chest pain to cardiovascular pathology to myocardial infarction to specific STEMI types. Existing evaluations cannot measure whether models preserve this taxonomic structure essential for clinical reasoning.

We introduce AnkiMedBench, built from 16,512 medical flashcards used by students preparing for licensing exams. Cards are organized across six hierarchy levels spanning 16 broad medical specialties to 672 specific diseases and conditions. …

A Competency Based Pressure Injury Management Program, Madina Qadir

UNLV Theses, Dissertations, Professional Papers, and Capstones

This project aims to implement a simulation-based wound management program to address critical gaps in nurses’ competencies for managing pressure injuries (PIs). The initiative seeks to enhance nurses’ knowledge, clinical skills, and confidence in wound assessment and advanced therapies, fostering evidence-based practice and consistent care delivery. Effective PI management is vital for improving patient outcomes, reducing healing times, and minimizing complications. Yet, nursing education and competency gaps often lead to inconsistent care and increased healthcare costs. A structured competency-based pressure injury management (CB PIM) program integrates evidence-based didactic lectures and interactive simulation-based skills stations to cover essential topics, including wound …

Perceptions And Behaviors Of Female Title I Principals And Faculty Trust In The Post-Covid-19 Educational Environment, Jessica A. Robbins

UNLV Theses, Dissertations, Professional Papers, and Capstones

Faculty trust in principals is essential to a healthy school culture, yet it remains one of the most fragile and complex aspects of leadership, particularly in Title I schools (Tschannen-Moran, 2007, 2014; Tschannen-Moran et al., 2015). While trust has been widely studied, fewer investigations have focused on the specific behaviors female principals use to build trust in the post-COVID era (Berkovich, 2018; Bukko et al., 2021; Handford & Leithwood, 2013; Jeanquart-Barone, 2013; Zajda et al., 2023; Zheng et al., 2021). Research suggests that women in leadership must be deliberate in fostering trust, yet their behaviors are often judged more harshly …

“I Can Gossip With Anybody, I Can’T Chisme With Everybody”: Chisme, Gossip, And Identity In Latina-Americans, Alexa B. Romero

UNLV Theses, Dissertations, Professional Papers, and Capstones

As individuals adjust to their belonging to two distinct cultures, there are various ways of adapting to their navigation of the two cultures (Berry, 1980). The way(s) an individual chooses to adjust to their two cultures can have varying effects on identity. When directly translated, chisme (Spanish) means gossip. Although the two include overlap in function and uses, chisme offers unique purposes for the Latinx community and further, Latina-Americans (González Ybarra & Player 2024; Gutierrez, 2017; Uribe, 2025). By using the communication theory of identity (Hecht, 1993) the purpose of this thesis was to investigate the role of chisme and …

Understanding The Musical Theatre Female Mixed Belt Through The Lens Of The Operatic Tenor: A Comparative Study, Courtney Schwalbe

UNLV Theses, Dissertations, Professional Papers, and Capstones

Since its emergence in the early 20th century, the female belt voice has become central to musical theatre, yet it still receives less systematic attention than classical singing in both scholarship and collegiate pedagogy. This document frames the contemporary female belt, especially the high or mixed belt, in dialogue with the Western operatic tenor to demystify belt production for teachers trained in classical vocal pedagogy. Drawing on historical context, voice science, and applied pedagogy, the study compares defining characteristics, vocal challenges, registration, and resonance strategies across the two traditions. Both voices extend chest-dominant qualities above the primary register transition and …

Las Voices: The Impact On Black Young Males In A Critical Mentorship Program In The Las Vegas Valley, Sean C. Tory

UNLV Theses, Dissertations, Professional Papers, and Capstones

In America, Black young males face an enormous amount of pressure regarding their social and racial identity. They battle with racial macro/microaggressions, stereotypes, racism, and socialization from various industries and systems. The community organization, King of Jewels, has been able to adopt effective strategies to help Black young males navigate these issues through critical mentorship. This paper will first demonstrate the importance of critical mentorship, Black Racial Identity Development, and will then outline the steps necessary to fill the gaps found in mentorship and Black Racial Identity Development literature. This qualitative study investigates the use of critical mentorship (CM) and …

Examining Religiosity, Suicidality, And Internalized Homonegativity Among Ethnoracially Diverse Sexual Minority Students, Danica Christy

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sexual minority (SM) individuals are at an elevated risk for suicidality, particularly those who hold multiple marginalized identities, including religious and racial minority statuses. While religiosity is generally protective against psychological distress and suicide for heterosexual individuals, its impact on SM individuals is more complex. It may function as both a risk and a protective factor. The current mixed methods study explored the relationships between religiosity, internalized homonegativity (IH), and suicidality among an ethno-racially diverse sample of college students (n = 246). Quantitative analyses revealed that SM participants (n = 123) reported significantly higher rates of suicidality than their heterosexual …

Enviromental Dna (Edna) Tools For Invasive Mosquitofish (Gambusia Affinis) Surveillance At The Shoshone Pupfish (Cyprinidon Nevadensis Shoshone) Refugium, Yusuf Olamilekan Umar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Spring-fed aquatic ecosystems of the North American Southwest and U.S. Great Basin hosts a plethora of endemic fish species due to the effects of hydrologic fragmentation that resulted from Pleistocene aridification. Threats to endemic fishes worldwide include human intentional or unintentional release of exotic species into their habitats. Early detection of invasive species, while corrective actions are still possible, is critical for management, yet traditional survey methods are often disruptive to sensitive ecosystems, costly, and limited in sensitivity. The recent development of environmental DNA (eDNA) approaches offers powerful alternatives for invasive species monitoring in aquatic systems. In this study, a …

Beyond Single Metrics: A Holistic Benchmarking Framework For Low-Power Embedded Systems, Hassan Adam

UNLV Theses, Dissertations, Professional Papers, and Capstones

Modern embedded systems encounter a notable challenge in evaluation. While devices may meet traditional benchmarks, they often underperform in real-world applications due to neglected interactions at the system level. Current benchmarking suites, such as MLPerf Tiny and EEMBC ULPMark, evaluate specific metrics including computational throughput, energy efficiency, and memory usage. However, they do not consider the complex interdependencies that affect real-world performance. This thesis presents a benchmarking framework that concurrently evaluates multiple performance dimensions under realistic workloads, revealing system behaviors that are often hidden in conventional benchmarks.Through the comprehensive evaluation of three representative algorithms: Fast Fourier Transform, quantized neural network …

Rna’S Symphony: Harmonizing Splice Junctions And Exon Counts For A Novel Approach To Differential Splicing Analysis, Jelard Aquino

UNLV Theses, Dissertations, Professional Papers, and Capstones

Alternative Splicing (AS) plays a critical role in transcriptome complexity and cell-type-specific gene regulation, yet its analysis remains methodologically fragmented, especially in the context of noisy and sparse single-cell RNA sequencing (scRNA-seq) data. This dissertation addresses key computational challenges in AS detection by evaluating existing tools, developing integrative frameworks, and proposing new strategies for improving analysis accuracy in both bulk and single-cell contexts. In chapter 1, I present a comprehensive literature review of computational tools designed for detecting and quantifying AS from bulk and scRNA-seq data. This review outlines major methodological paradigms, including exon-based and splice junction-based approaches, and evaluates …

Effects Of Body Armor On Respiratory Muscle Fatigue And Muscle Blood Flow During Progressive Treadmill Marching, Kathryn Bell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Torso-borne loads such as body armor are essential for modern military operations but impose mechanical and metabolic strain. These physiological stressors can trigger the inspiratory metaboreflex, which redirects blood flow from locomotor to respiratory muscles, further reducing muscle oxygen and endurance. While aerobic fitness has been shown to alleviate these effects, the interaction between sex, aerobic capacity, and oxygenation under load is not well understood. This study examined the physiological effects of torso-borne load carriage on respiratory muscle fatigue, skeletal muscle oxygenation, and exercise performance to volitional exhaustion and the degree to which sex and aerobic capacity influence these …

Hot Spring Associated Infectious Diseases In The Great Basin And Southwest, Matthew Bentz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Like all bodies of freshwater, natural hot springs can harbor pathogenic microorganisms that carry the threat of infectious disease. The unique chemistry, increased temperature, and popularity for bathing may alter the risk profile of hot springs compared to other natural bodies of water. Despite this risk, the role of hot springs as a reservoir for infectious diseases remains understudied, particularly within the context of regional public health. Nevada and the Great Basin/Southwest have increasingly promoted hot springs for the purposes of tourism, and they share a strong link to the cultural heritage of the region. The unknown risk profile and …

Morphological And Transcriptional Responses Of Mammalian Cells To Glucose Stress, Cassandra Burke

UNLV Theses, Dissertations, Professional Papers, and Capstones

Organismal cells encounter varying conditions, including daily and potentially seasonal fluctuations in available glucose. While some species tightly regulate circulating glucose levels, others tolerate extreme fluctuations, such as frugivorous bats experiencing post-prandial hyperglycemia and hibernating mammals maintaining stable glucose through torpor and hibernation. To investigate how these species-specific strategies influence cellular responses to glucose perturbation, primary dermal fibroblasts from nine mammals – humans, rats, Egyptian fruit bats, brown bear, 13-lined ground squirrel, little brown bat, gelada, honey badger, and Bactrian camel – were exposed to hypoglycemic (2.5mM), baseline (8mM), or hyperglycemic (30mM) treatment. Cell morphology was evaluated using Cell Painting, …

An Examination Of The Purity Culture Beliefs Scale And The Interaction Of Religiosity, Purity Culture Beliefs, And Pornography Use In A Census-Matched United States Sample, Kaelyn R. Griffin

UNLV Theses, Dissertations, Professional Papers, and Capstones

The impacts of purity culture have been documented in the prevalence of abstinence-only sex education, perception of personal value tied to virginity, and shame and guilt related to sexual behavior. Similarly, models of moral incongruence often examine religiosity as a contributor of distress related to sexual behavior and pornography use, likely tapping into the influence of purity culture without directly naming its presence. This distinction is crucial due to the variety of religious beliefs and practices, some including purity culture and those without sexually restrictive beliefs and practices. Despite this, standardized measures for researching purity culture are limited. Ortiz (2018) …

Understanding Ore Deposit Scale Controls On Au Enrichment In Carlin-Type Au Mineralization: A High-Resolution Study Of The Rita K Deposit, Conner T. Callaway

UNLV Theses, Dissertations, Professional Papers, and Capstones

Controls on the distribution of gold (Au) within the Rita K Carlin-type deposit are poorly understood. The primary Au-bearing carbonate unit Wispy, is a bioturbated muddy limestone with debris flow clasts that range in size but are typically >5 cm occurring in the lower sections. The orebody is described as a syncline-anticline pair that hosts high-grade Au ore in the fold hinges. The spatial relationship between Au mineralization and fold hinges suggests that shortening due to folding is an important mechanism producing Au-enriched zones. However, the exact mechanism of Au enrichment and deposit-scale controls on Au distribution and fluid evolution …

Assessing The Impact Of Cdbg And Home Block Grants On Housing Affordability In The Las Vegas–Henderson–Paradise Metropolitan Statistical Area, David Hasan

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation aimed to analyze the impacts of aggregated federal funding from the CDBG and HOME block grants on temporal changes in the Housing Affordability Index (HAI Change). The temporal change in Housing Affordability between 2011–2015 and 2016–2020 was constructed as the dependent variable to measure the direct and indirect impacts of CDBG/HOME funding. Therefore, this dissertation seeks to identify the impacts of aggregated funding on changes in housing affordability and to explore spatial spillover effects through spatial dependencies that may influence housing affordability change as a dependent variable. The geographical area of this study is the Las Vegas–Henderson–Paradise MSA, …

Integrated Uav Platform For Multi-Spectral, Thermal, And Eos Imaging In Wildfire Monitoring And Modeling, Md Shariful Islam

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis presents the design and development of a modular unmanned aerial vehicle (UAV) system based on a quadcopter platform for flexible and efficient wildfire-related multimodal image acquisition. Addressing key limitations in ecological UAV monitoring such as sensor inflexibility, time-consuming reconfiguration, and imprecise image georeferencing, the system introduces a versatile payload integration framework supporting three distinct imaging sensors: MicaSense Altum-PT, FLIR Vue Pro R, and Sony Alpha 6000.All onboard components, including the flight controller, autopilot software, GNSS module, motors and ESCs, were selected to optimize stability and payload performance. A gimbal-free, downward-facing mount simplifies field deployment, while custom integration enables …

Functional Biopolymers Applied To Sustainable Technologies In The Environment And Healthcare, Fengjie He

UNLV Theses, Dissertations, Professional Papers, and Capstones

Biodegradable polymeric materials (biopolymers) are naturally derived materials known for their excellent biocompatibility, biodegradability, sustainability, and versatile chemical functionality. They have attracted increasing attention in various applications as alternative to synthetic materials ranging from food packaging to tissue engineering. Meanwhile, with intrinsic advantages, biopolymers have also emerged as promising materials in addressing contemporary challenges in both biomedical and environmental fields. Motivated by the significant potential of biopolymers and the growing need for sustainable materials, my research focuses on the design and engineering of biodegradable polymers with novel modification methods and application directions. In this work, two representative biopolymers are selected: …

Housewerk: How Drag Performers Engage In Emotional Labor While Navigating Community Care, Steph O. Landeros

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation examines drag performance as a form of service labor shaped by emotional labor, community care, and identity-based inequality. Drawing on interviews with drag performers shows how drag labor blends artistic skill, emotional regulation, interpersonal care, and entrepreneurial labor. While these demands mirror service sector roles in other industries, drag remains underrecognized and undervalued, particularly for performers who do not conform to white, cisgender norms. The study introduces Housewerk—an adaptation of Marlon Bailey’s concept of housework (Bailey, 2013)—to describe the mix of paid and unpaid labor drag performers engage in. Housewerk captures how performers must balance self-preservation (branding, income, …