Digital Commons Network^™

A Novel Game-Based Assessment Of Risk-Taking Propensity: Development And Psychometric Evidence, Danielle L. Head

UNLV Theses, Dissertations, Professional Papers, and Capstones

Risk-taking propensity is defined and measured in different ways across the literature, resulting in assessment issues related to construct validity (Bran & Vaidis, 2020). Multimethod assessment approaches can bolster construct validity by capturing more facets of risk-taking propensity (Meyer et al., 2001). Risk-taking propensity is assessed through self-report questionnaires (Zhang et al., 2019), which exhibit good test-retest reliability (Frey et al., 2017) and predictive validity (Beauchamp et al., 2017), and behavioral tasks (Aklin et al., 2005), which are less psychometrically sound, lacking convergent validity and test-retest reliability (Frey et al., 2017). Guided by evidence-centered design principles (Mislevy, 2013), a novel …

Ethnoracial Characterization Of Cognitive Function And Activities Of Daily Living In Neurodegenerative Diseases, Justine A. Bachmann

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: Neurodegenerative diseases, such as Alzheimer's disease (AD), lead to progressive cognitive and functional decline, which significantly affects individuals’ ability to perform their everyday Activities of Daily Living (ADLs). Occupational Therapist (OTs) assess cognitive impairments and their impact on daily function by utilizing tools like the Montreal Cognitive Assessment (MoCA) to guide intervention planning. However, research on the MoCA’s effectiveness across ethnoracial groups is limited, raising potential biases in the accuracy of cognitive assessments. This study examines the relationship between cognitive function, measured by the MoCA, and functional impairment, assessed using the Functional Activities Questionnaire (FAQ), among ethnoracial older adults …

Oral Prevalence Of Selenomonas Noxia Differs Among Orthodontic Patients Compared To Non-Orthodontic Controls: A Retrospective Biorepository Analysis, Kyle Hodges

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: The introduction of fixed orthodontic brackets in orthodontic therapy has the potential to significantly alter the oral microbial flora. Most orthodontic research has focused on cariogenic pathogens, while some evidence has demonstrated an increase in many known periodontal pathogens. However, little is known about the prevalence of the gram-negative periodontal pathogen, Selenomonas noxia (SN) among these patients.Methods: Using an existing saliva biorepository, n=208 samples from adult and pediatric orthodontic and non-orthodontic patients were identified and screened for the presence of SN using qPCR and validated primers. Results: In the pediatric study sample (n=89) 36% tested positive for the presence …

Identifying Alternatively Spliced Events And Exons Between Blood Cell Types, Jessica Holder

UNLV Theses, Dissertations, Professional Papers, and Capstones

Transcript isoforms arising from alternative splicing events can contribute to the development of a cell’s identity and function and overall protein diversity. Peripheral blood is a useful model to study and evaluate computational methods for alternative splicing detection due to its abundant data across various sequencing protocols. The alternative splicing events across different blood cell types have not been completely identified and detecting alternative splicing through short read sequencing is still a challenging problem. Here, we propose to integrate multiple bulk RNA-seq datasets of purified blood cells using a novel integration method to identify the cell-type specific alternative splicing events …

Climate Change And Hydropower Development Impacts In The Lower Mekong Basin, Nudthawud Homtong

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Mekong River Basin is vital to East and Southeast Asia, supporting over 60 million people and sustaining critical ecological systems. However, the basin faces dual threats from climate change and hydropower development, jeopardizing its ecological balance, hydrological patterns, and resource reliability. This research focuses on the Lower Mekong Basin (LMB), where aggressive hydropower expansion and climate variability have intensified concerns about sustainable water management. The study is divided into three interconnected parts. Part I examines spatial and temporal precipitation patterns in the Chi-Mun Basin (CMB) and Lower Mekong River (LMR) from 1950 to 2008, using linear regression and Mann-Kendall …

Dysregulation Of Vitamin D Receptor And Cyp450 Metabolism Enzymes May Explain Oral Cancer Responsiveness, Dustin Hunsaker

UNLV Theses, Dissertations, Professional Papers, and Capstones

Many health benefits are associated with Vitamin D (VitD), although deficiency is associated with poor health outcomes and increased risk for cancer development. For example, many tissue specific enzymes are involved in VitD metabolism, and mutations or deletions within Vitamin D receptor (VDR) genes are known to increase cancer risk by altering their functions or bioavailability, although less is known about these phenomena in oral cancers. Using well characterized, commercially available oral cell lines (OKF4, HGF-1, SCC4, SCC9, SCC15, SCC25, CAL27), mRNA expression of P450 cytochrome VitD metabolic enzymes and receptor genes by qPCR revealed differential results. One oral cancer …

A Comparative Study Of Music Between Mongolia And The Mongolian Ethnic Minority In China: Cultural Backgrounds, Musical Styles, And Modern Developments, Yile Huang

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis conducts a comparative study of Mongolian music traditions as they have developed both within Mongolia and among the Mongolian ethnic minority in China, exploring their cultural backgrounds, musical styles, and contemporary developments. By investigating the historical, geographical, and socio-cultural influences that shape the music in these regions, this study highlights the unique musical identities of each group while uncovering their commonalities and cultural exchanges. Drawing from a wide range of sources—including ethnographic studies and analysis of specific musical pieces—this research examines foundational elements such as the Mongolian long song, throat singing, and horsehead fiddle music. These traditional forms …

Stronger Together: A Mixed-Methods Examination Of Identity, Efficacy, And Emotions In Young Adults’ Collective Action, Kindy Insouvanh

UNLV Theses, Dissertations, Professional Papers, and Capstones

Young adults are increasingly engaging in collective action for social change, yet we lack a clear understanding of the factors driving their participation in social movements. This mixed-methods study uses a social psychological framework to examine key quantitative factors related to young adults’ intentions to engage in collective action for racial justice, as well as their reasoning around their involvement. A survey of 373 racially and ethnically diverse young adults (18-35 years old) assessed the impact of racial justice ally identity, emotions (anger and contempt), and dimensions of efficacy on action intentions. Path analysis revealed that young adults’ identification as …

Performance Optimization-Focused Family Behavior Therapy To Address Verbal And Physical Aggression In An Adolescent Diagnosed With Bipolar I Disorder: A Case Report, Sierra Ann Ramirez Jarvis

UNLV Theses, Dissertations, Professional Papers, and Capstones

Bipolar disorder is a chronic and debilitating condition characterized by fluctuations in mood that significantly interfere with day-to-day functioning. While symptom onset typically occurs in early adulthood, manifestations can occur at an earlier developmental stage. Early intervention has been shown to be effective in decreasing long-term negative outcomes and decreasing symptom severity in serious mental illness (SMI) populations, and as such, early intervention treatment programs may have particular benefits for individuals who are early in the course of bipolar disorder. However, there is little information regarding the effectiveness of these programs. This thesis reports a case of an adolescent client, …

Cone Beam Ct Assessment Of The Zygomatico-Maxillary Buttress For Bone Thickness And Clinical Implications For Miniscrew Insertion, Zachary Hendrickson

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Temporary anchorage devices (TADs) have changed the way many orthodontists practice orthodontics. TADs are mini-screw temporary implants made of titanium or stainless steel that are placed in the patient's bone in different locations to aid in complex biomechanical movements. This complete anchorage aids in distalization, intrusion, protraction, etc. with less reliance on patience compliance. While TADs have made many movements easier, there are limitations such as choice of where to place it, skill at placing them and patient individual physiology and anatomy that can limit the use of TADs.Objectives: Infrazygomatic crest (IZC) TADs are particularly useful for distalization and …

Improved Electric Load Modeling Of Residential Air Conditioning, Julius Johnson

UNLV Theses, Dissertations, Professional Papers, and Capstones

The recent increase in energy production from renewable resource introduces a new challenge in managing and maintaining balance between electricity supply and demand, due to uncertainty and variability of wind speed and solar irradiance. To address this growing problem, demand-side management, such as Demand Response (DR) programs, is employed to adjust power consumption. Residential air conditioners (ACs) are the most suitable candidates for DR, due to their intensive power consumption and inherent thermal inertia that allows flexibility in their operations (by adjusting their set-point temperatures) without sacrificing customer comfort. Most prior research on AC load models assumes that such a …

Planting Seeds, Changing Minds: A Narrative Analysis Of Environmental Children’S Books, Julianna Jovillar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Children’s books are some of the earliest forms of entertainment and education a person will interact with in their lifetime. Simultaneously weaving a tale and teaching a lesson, children’s books, therefore, have the great potential to communicate important lessons and mindsets at young ages. Utilizing narrative theory (Fisher, 1984) and ecocriticism (Glotfelty, 1996), while also considering environmental ideologies and narrative components (Bloomfield, 2024), this study explores the functions of environmental children’s books and how they might communicate environmental messaging and encourage ecological thinking. Following a narrative analysis of 46 environmental children’s books, the results of this study indicate that there …

The Effectiveness Of Occupational Therapy Objective Structured Clinical Exam & Student Self-Efficacy In Preparation For Fieldwork Rotation, Angela Kay

UNLV Theses, Dissertations, Professional Papers, and Capstones

This capstone project focuses on exploring the effectiveness of the University of Nevada, Las Vegas Department of Occupational Therapy’s Objective Structured Clinical Exam (OSCE) on students’ perceived self-efficacy in preparation for and throughout fieldwork rotation. This retrospective study analyzed repeated measures of the New General Self-Efficacy (NGSE) Likert Scale collected from a sample of 49 occupational therapy students across five time points. Findings indicated a statistically significant increase in self-efficacy over time (p< .001). These results suggest that the OSCE may play a meaningful role in enhancing students’ self-efficacy in their clinical hands-on skills, supporting its continued use in occupational therapy academics.

Undergraduate Student Experiences Of Flow In Culturally Relevant And Contextual Digital Math Games, Kaylie Kurland

UNLV Theses, Dissertations, Professional Papers, and Capstones

Students in co-requisite mathematics classes represent a diverse group of learners, with one thing in common: their previous math performance. This research investigates how playing culturally responsive educational games is associated with students' learning and experience of flow. Quantitative analyses revealed no significant differences in flow scores across demographic groups. However, students with stronger STEM identities reported experiencing higher levels of flow, on average. Math self-efficacy was not significantly associated with flow experiences. ANOVA results indicated that flow was not significantly related to final course grades (F = 0.465, p = 0.707, η² = 0.008), suggesting that students’ self-reported flow …

Cross-Correlation Studies Of The Cosmological 21 Cm Signal And High-Redshift Galaxy Distributions, Simon Matin

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Epoch of Reionization (EoR) marks a critical phase in cosmic history, during which time the first stars and galaxies ionized the surrounding neutral hydrogen gas. A powerful way to probe this period is by cross-correlating the 21 cm signal from neutral hydrogen with high-redshift galaxy distributions. In this study, we analyze the 21 cm-galaxy cross-power spectrum using simulated sky maps and explore its redshift evolution, revealing a transition from positive correlation at early times (high redshift) to anti-correlation at later stages of reionization (low redshift). Our results highlight the sensitivity of the cross-power spectrum to the evolving ionized structure …

Realizing And Practicing Teaching As A Calling: Narratives From Black Women Teachers In Urban K-12 Public Schools, De'ana Renee Mauldin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Research and scholarship frequently ignore and dismiss the unique experiences and perspectives of Black women teachers. They bring with them a unique angle of vision through various race, gender, cultural, and historical intersections that inform their spirituality-based pedagogy and outlook while providing instruction in urban public schools.The purpose of this qualitative dissertation study is to examine the narratives and amplify the voices of Black women K-12 teachers in urban public schools to address how they realized teaching as a calling. Teaching as a calling is more than simply a job and source of income for these teachers. Understanding of this …

El, A Navigational Assistant Based Upon Echolocation, Arthur Mazer

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis investigates the integration of a parametric speaker with a microphone array to enhance the echolocation of objects. A parametric speaker focuses ultrasonic and audible waves in a specified direction. This endows the parametric speaker with the capacity to focus waves across a wide frequency spectrum enabling adaptation of the frequency to environmental considerations.Beam forming allows one to focus a microphone array in a specified direction. The thesis investigates different microphone array configurations for the purpose of enhancing the echolocation ability of an echolocation device. The primary goal of the thesis is the construction and testing of an echolocation …

The Impact Of Psychosocial Factors On Occupational Therapy Doctoral Students’ Communication With Fieldwork Educators: A Retrospective Analysis, Melissa Montes

UNLV Theses, Dissertations, Professional Papers, and Capstones

This capstone project investigates the impact of adverse psychosocial factors, such as depression, anxiety, and stress, on effective communication of occupational therapy doctoral (OTD) students with their fieldwork educators (FWEds) during level II fieldwork experiences at the University of Nevada, Las Vegas (UNLV). Using a convergent parallel mixed methods design and retrospective analysis, the study integrates quantitative data from the Depression, Anxiety, and Stress Scale (DASS-21) and qualitative data from the Fieldwork Experience Assessment Tool (FEAT) to explore how these factors affect communication and the management of the adverse psychosocial factors OTD students experience. This study involved 36 OTD students …

Analysis Of Incident Duration And Real-Time Incident Delay Estimation Using Big Data Analytics And Machine Learning Techniques, Zhubin Najafi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Traffic incidents have a significant impact on freeway operations, leading to severe delays, congestion, fuel wastage, and economic losses for commuters. Each year, billions of gallons of fuel are wasted, and drivers incur thousands of dollars in lost time due to incident-related delays. To mitigate these effects, Traffic Management Centers (TMCs) implement incident management strategies aimed at reducing both the frequency and severity of incidents while ensuring their prompt and safe clearance.

Dynamic Message Signs (DMSs) are key tools used by TMCs to communicate travel times and incident information to commuters. Under normal conditions, default travel times are displayed on …

Assessing The Effects Of Streptozotocin-Induced Hyperglycemia On Amyloid Beta Accumulation And Cognitive Behavior In A Mouse Model Of Alzheimer’S Disease-Related Pathology, Andrew Adonay Ortiz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Alzheimer’s disease (AD) is an irreversible and devastating neurodegenerative disease characterized by progressive synaptic, dendritic, glial, and neuronal loss, collectively leading to impairments in learning, memory, and deterioration of cognitive and behavioral functions. AD is the most common form of dementia accounting for 60-80% of all cases. AD affects approximately 7 million Americans and is the 6th leading cause of death in the US. Furthermore, by 2050, the US is projected to spend over $1.1 trillion on AD-related treatments. Pathological hallmarks of AD include beta-amyloid (Aβ) plaques, intracellular neurofibrillary tangles (NFTs), and chronic neuroinflammation, which can promote and exacerbate both …

Exploring The Occupation Of Parenting With A Cognitive Disability, Alysa Polley

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: To investigate how parents with cognitive disabilities perform child-rearing tasks and barriers associated with their disability, to determine their needs and self-efficacy to improve the role of occupational therapy in supporting child-rearing for parents with cognitive disability.Design: Qualitative Case-study, Phenomenology Setting: Gigi's Playhouse Participant(s): Inclusion criteria: parents or expecting parents, individuals with a cognitive disability resulting from an autism spectrum disorder diagnosis, English speaking, 18+, and autonomy to consent participation. Exclusion criteria: non-English speaking, individuals without a cognitive disability resulting from an autism spectrum disorder diagnosis, and under 18. Measure(s): Semi-Structured Interview and Tool for Measuring Parental Self-efficacy. Results: …

Detection And Quantification Of Total Airborne Fungi And Coccidioides Species In Environmental Samples, Theresa T. Roehr

UNLV Theses, Dissertations, Professional Papers, and Capstones

Fungal exposure can cause acute and chronic illnesses or exacerbate existing illnesses. Some fungi are opportunistic pathogens and can lead to serious systemic fungal infections. In 2020, more than 150 million cases of severe fungal infections were reported globally resulting in an estimated 1.7 million deaths. Coccidioidomycosis, or Valley fever, is classified as a serious fungal infection caused by the fungi Coccidioides immitis and C. posadasii. These particular fungi are prevalent in the soil of the Southwestern United States, including Las Vegas, Nevada. In 2024, there were a total of 269 cases of Valley fever reported in Nevada, and …

Maximizing Functional Independence And Well-Being: The Impact Of Sensory Impairments On Iadls And Functional Mobility Skills, Jessica L. Ryan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: Sensory impairments involving vision and hearing among the adult population are predicted to double by 2030 (Gutherie et al., 2018). Individuals with experiences of sensory impairments like low vision are at risk of decreased functional participation in their homes and communities, which often leads to mental health concerns due to social withdrawal, experiences with environmental barriers, and limited occupational engagement (Bezyak et al., 2017; Gerami et al., 2015; Pfeiffer et al., 2020; Vreeken et al., 2020). This doctoral capstone focused on program evaluation to support adults with low vision and blindness in transferring learned skills from a simulated environment …

Gaming Participation: An Occupational Therapy Approach To Esports Ergonomics, Althea Rivera-Millare

UNLV Theses, Dissertations, Professional Papers, and Capstones

Competitive e-sport gamers are increasingly at risk for repetitive strain injuries (RSIs) due to the prolonged and repetitive nature of their gaming demands. Current healthcare protocols often overlook the unique ergonomic needs of this population, potentially leading to decreased occupational performance and dysfunction. This study aims to develop and evaluate an evidence-based ergonomic protocol tailored specifically to e-sport gamers who primarily use a mouse and keyboard, with the goal of reducing the risk of musculoskeletal injuries and enhancing gaming performance. Grounded in the principles of occupational therapy, the study emphasizes occupation-based interventions that address the specific occupational demands of e-sport …

Qualitative Analysis Of The Influence Of Military Culture On The Resocialization Of Combat Veterans, Kyle N. Rodgers

UNLV Theses, Dissertations, Professional Papers, and Capstones

The researcher conducted in-depth interviews with 25 combat-experienced Veterans of the Global War on Terror who fit an operational definition of successful resocialization. How do successfully resocialized combat Veterans compare with combat Veterans who became involved with the criminal justice system? Utilizing a snowball method to identify each participant, the most significant finding from these interviews was that two factors seem to differentiate the civilian and military group styles the most, which were the overwhelming importance of purpose and tribe in the lives of combat Veterans. This confirmed the hypothesis that the most significant difference between the civilian and military …

On The Special Cases Of Carmichael’S Totient Conjecture, Christopher Saito

UNLV Theses, Dissertations, Professional Papers, and Capstones

Euler’s totient function, φ(n), is the arithmetic function defined as the number of positive integers less than or equal to n that are relatively prime to n. In his 1922 paper [3], Professor R. D. Carmichael conjectured that for each positive integer n, there exists at least one positive integer m̸ = n such that φ(m) = φ(n).In this thesis, we consider some relevant literature and explore Carmichael’s totient conjecture for particular values of φ(n) = k. Our main consideration will be the set X_k = {n ∈ N : φ(n) = k}. In identifying X_k for k = 2^t, …

Qualitative Analysis Of Clinical And Community Perinatal Providers’ Perceived Barriers To Equitable Care For Food Insecurity In Underserved Communities In Southern Nevada, Kaelia Lynn KeapomekuʻUaloha Saniatan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Food insecurity is prevalent among underserved communities and contributes to increasing maternal-child health disparities. The perinatal period from pregnancy through one year postpartum provides a critical window of opportunity to identify and address food insecurity (FI). However, barriers such as inadequate staffing, lack of institutional and community resources have prevented perinatal providers from offering equitable care for FI, defined as providing screening, referrals, and follow-up services. The Social Ecological Model (SEM) is a framework that observes concepts at multiple levels, including (i) individual, (ii) interpersonal, (iii) institutional, (iv) community, and (v) policy. The objective of this study is to understand …

Investigating Decision Factors For Modularization And Standardization Decision On Early Project Phase: Qualitative Comparative Analysis, Amrit Shahi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Modularization involves shifting site-based work to offsite locations to enhance overall productivity, reduce costs, shorten schedules, and improve project competitiveness. By developing and utilizing consistent designs, facility standardization further optimizes project schedules, costs, and value. When combined, they create a leveraging opportunity, as seen in the shipbuilding and manufacturing industries. While both strategies offer significant advantages, capital projects struggle to have a well-informed modularization and standardization decision during the early project phase (i.e., Opportunity Framing). This often results in improper implementation and lower modularization and standardization levels. The main cause for this is the industry’s limited understanding of early-phase high-level …

Teacher Perceptions Of Their Role In Aspiration Development With Diverse Students With Disabilities, Joseph Edward Simmons Jr.

UNLV Theses, Dissertations, Professional Papers, and Capstones

Aspirations stem from a humanistic perspective, emphasizing the person as a whole. They serve as a foundational and predictive component of an individual’s life. Teachers play a critical role in shaping the successes and challenges their students encounter (Zolkoski, 2019). Aspirations, as a cognitive process grounded in forward-thinking, are essential to personal development and evolve through experiences (Hart, 2016). However, students with disabilities often lack opportunities to explore their aspirations within schools. These students are frequently constrained by both teachers and systemic practices within the school environment (Gilmour et al., 2019). Aspiration exploration is crucial because children and youth need …

Elevating Education: Leveling Up Individual Learning Plans, Maximum Mgrdich-Ararat Sirabian

UNLV Theses, Dissertations, Professional Papers, and Capstones

This three-article dissertation investigated the effectiveness, implementation quality, and automation of Individual Learning Plans (ILPs) in promoting college and career readiness. Article 1 analyzed High School Longitudinal Study of 2009 data and found that ILPs did not significantly guide course alignment. Article 2 examined ILP implementation across Nevada high schools, revealing inconsistent quality, limited standardization, and few culturally responsive practices. These findings informed the creation of a new high-quality ILP framework. Article 3 employed a convergent parallel mixed methods design to assess an automated ILP prototype based on this framework. Participants in the automated group reported significantly higher scores in …