Digital Commons Network^™

Face Recognition Ability: The Role Of Facial Experience Across The Lifespan, Kirsty Kulhanek

UNLV Theses, Dissertations, Professional Papers, and Capstones

The other-race effect is a phenomenon in which individuals are better able to recognize individuals of their own race than individuals of another race. These effects begin to develop during the first year of life and may be attenuated by intergroup contact. Limited research in the language domain has suggested that multilingualism may result in easier learning of non-native speech contrasts, so it is of interest whether early experience with racially diverse faces may result in more easily learning to recognize unfamiliar race faces. We conducted two studies to examine the effects of early diverse experience with faces on recognition …

Transforming Fear Of Falling Care: Bridging Evidence Synthesis And Clinical Trial On Cognitive Behavioral Therapy-Based Multicomponent Interventions For Older Adults, Haehyun Lee

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Fear of falling (FoF) and associated avoidance behavior represent critical health concerns for older adults, with profound impacts on physical functioning, independence, psychosocial well-being, and healthcare utilization. Although fear of falling avoidance behavior (FFAB) is increasingly recognized as a distinct construct and clinically meaningful construct, intervention research remains limited due to fragmented assessment methodologies and incomplete integration of cognitive-behavioral and physical approaches. This dissertation addresses these gaps through two interrelated projects (1) a scoping review of the evidence base, assessment methods, and intervention strategies for Cognitive Behavioral Therapy (CBT) targeting FFAB in older adults; and (2) a randomized controlled …

Computational Study Of Cavitation In An Inducer Pump, Jaylen Leonard

UNLV Theses, Dissertations, Professional Papers, and Capstones

Cavitation is ubiquitous in liquid-handling turbomachines. Cavitation bubbles form when the local pressure drops below a fluid’s vapor pressure, and their subsequent collapse causes implosions that generate shockwaves and microjets. These effects lead to fluid instability and structural damage to the blades and casing in turbomachines. This thesis investigates this cavitation phenomenon in turbomachines using Computational Fluid Dynamics (CFD). The cavitation model built in ANSYS Fluent® is first validated in a venturi tube model and then applied to an inducer pump. The geometry of the pump is derived from the Space Shuttle Main Engine (SSME) Low Pressure Oxidizer Pump (LPOP) …

A Case Study Of The Implementation Of Nevada’S Program To Reduce Recidivism Of The State’S Female Prison Population, Lisa C. Levine

UNLV Theses, Dissertations, Professional Papers, and Capstones

Success in public administration is often defined by long-term goals that demonstrate how effective a program or policy is. These long-term goals can take years to measure leading to investment doubts, shifting stakeholder goals, and the sunsetting of programs. There is a need to better understand how short-term and intermediate outcomes of a program can be used to measure success and the role goal orientation of stakeholders play in the implementation. Prison education programming exemplifies this problem as reducing recidivism, a leading goal for these types of programs, take a lifetime to prove. This study examines a female prison education …

Geometric And Proximity Based Substrate Targeting By Cullin-Ring Ligases, Jerry Li

UNLV Theses, Dissertations, Professional Papers, and Capstones

Homeostasis, the process of maintaining stable biochemical and biophysical conditions, is a fundamental facet of cellular viability. Biochemical homeostasis is critical to support the biological functions that sustain living organisms. Protein ubiquitylation is one of the primary cellular pathways that regulate protein homeostasis and turnover. Ubiquitylation is initiated through the conjugation of a small globular protein known as ubiquitin, onto a given substrate. There exists a myriad of cellular fates that ubiquitylated proteins may undergo, but the most widely studied pathway is protein degradation, whereby a ubiquitylated protein substrate is shunted to a large macromolecular protease known as the proteasome, …

Gaming: An Untapped Resource For Women In Computer Science Careers?, Claudia Quynh Luu

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research focused on women who identify as gamers (i.e., an individual who regularly plays video games) with the goal of better understanding how being a gamer might help or hinder women’s interest in computer science careers. In particular, I examined the connection between interest in computer science careers, gaming, sexual harassment experiences, coping strategies, and allyship for women in gaming using a mixed-methods approach. The sample (N = 166) included women identifying as previous or current gamers. Participants were recruited from a psychology participant pool and gaming communities on Discord. We conducted a series of analyses to examine whether …

Quantifying Biocrust Evaporation In Arid Lands By Combining Thermal Imaging And Lysimeter Measurements, Rebekah C. Magness

UNLV Theses, Dissertations, Professional Papers, and Capstones

Biological soil crusts (biocrusts) are miniature ecosystems of living organisms incorporated within the soil matrix and established in the topmost millimeters of the soil surface. Biocrust plays a critical role in the hydrologic processes in arid lands, yet the extent to which it increases or decreases evaporation remains unclear. To gain a better understanding of the impact of biocrust on evaporation compared to bare soil, I studied a cyanobacteria-dominated biocrust patch surrounded by bare soil atop a lysimeter in the Mojave Desert near Las Vegas, Nevada. Using high-resolution thermal imaging, and the known latent heat flux from the lysimeter, I …

Preparing Aspiring School Administrators For Data-Informed Decision-Making, Brandi March

UNLV Theses, Dissertations, Professional Papers, and Capstones

School leaders significantly impact student outcomes based on their ability to influence school culture, climate, and student engagement. They are essential for driving school achievement and instructional improvement. As educational policies increasingly emphasize data usage, leaders must utilize various data sources in a problem-solving process known as datainformed decision-making (DIDM) to effectively guide their school improvement plans. Using DIDM effectively can enhance instruction and student achievement when school administrators and teachers have access to quality training that builds a strong foundation in data literacy skills. It is critical for administrators to provide high-quality professional development for teachers on DIDM to …

A Mixed Methods Study Of Teacher Job Satisfaction And Principal Support In Private Jewish Day Schools Through The Lens Of Self-Determination Theory, Abigail E. Moyal

UNLV Theses, Dissertations, Professional Papers, and Capstones

This mixed methods study investigated how principal support influences teacher job satisfaction in private Jewish day schools through the lens of Self-Determination Theory (SDT). SDT asserts that motivation and well-being depend on the fulfillment of three basic psychological needs: autonomy, competence, and relatedness. Using an explanatory sequential design, quantitative data were first collected from 68 teachers across five Jewish day schools in the Southwestern United States using the Teaching and Learning Survey (TALIS) Teacher Job Satisfaction Scale (TJSS) and the Principal Support Scale (PSS). Results showed moderate to high satisfaction levels and a strong positive correlation between principal support and …

Characterization Of The Electronic Structure Of Metal–Organic Framework Mil-125 And Its Derivatives Using Soft X-Ray Spectroscopies, Jennifer Alexia Napoles

UNLV Theses, Dissertations, Professional Papers, and Capstones

Metal–organic frameworks (MOFs) are highly porous, three-dimensional networks composed of coordinated metal clusters and organic ligand subunits. While tens of thousands of MOFs have been synthesized, the Ti(IV)-based MOF MIL-125 has garnered scientific interest due to the observed changes to its optical and photocatalytic properties upon chemical modification. For example, upon UV irradiation in the presence of an alcohol, MIL-125 undergoes a photochromic color change to a photodoped state that has been associated with the storage of charge in the form of Ti(III) sites. Another example is exemplified by the amine group functionalization of the 1,4-benzenedicarboxylate (BDC) linker of MIL-125 …

Design And Development Of Biomimetic Hydrogel Interfaces For Enhanced Bioelectrical Signal Acquisition, Daniela Nikoloska

UNLV Theses, Dissertations, Professional Papers, and Capstones

Every second, human skin processes over one million sensory signals while maintaining properties such as electrical conductivity, mechanical adaptability, and regenerative capability that surpass all synthetic materials. Contemporary bioelectronic devices prove inadequate when contacting skin surfaces due to poor adhesion and electrical contact issues that prevent effective sensing. Despite advancements in wearable and bioelectronic technologies, current devices face major drawbacks when interfacing with human skin, particularly in maintaining firm adhesion, conformability, and low-noise electrical signal acquisition.

This research focuses on the development of a biomimetic hydrogel-based interface for bioelectronic sensing. Specifically, a hybrid hydrogel system composed of polydopamine (PDA)- doped …

The Impact Of Formally Trained Teacher Leaders On Student Outcomes, Jodi Notch

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study examined the relationship between teacher leadership and student achievement through the lens of Distributed Leadership Theory. Specifically, it addresses three research questions: (a) To what extent is the implementation of teacher leadership by formally trained teacher leaders associated with academic success in schools? (b) Is there a difference in impact between formal teacher leader positions versus informal teacher leader positions? (c) How does having multiple teacher leaders in a school impact student outcomes? Using a two-way fixed effects design with a longitudinal panel data set, the analysis investigates the effects of employing teacher leaders trained through a formal …

Integrating Post-Quantum Cryptography Into A Cdn-Style Pki: Tls And Quic Performance Across Pqc Suites, Katrina Mary Parsom

UNLV Theses, Dissertations, Professional Papers, and Capstones

Post-quantum cryptography (PQC) adds larger certificates and extra workload to the Transport Layer Security (TLS) handshake. In order to analyze the effect of that change on content delivery, a controlled testbed with conditions replicating a Content Delivery Network (CDN) is used. The system uses a standard X.509 certificate chain over TLS 1.3. It compares RSA with classical key exchange, RSA with hybrid key encapsulation mechanism (KEM), and Module Lattice-based Digital Signature Algorithm (ML-DSA) with hybrid KEM. The test harness generates and provides certificates and establishes TLS parameters. The test harness also supports mixed web workloads and records key metrics, including …

Demographic Similarity, Psychopathy, And Perceived Inherent Value: An Investigation Of Factors Influencing Moral Decision Making, Ashley Michelle Poston

UNLV Theses, Dissertations, Professional Papers, and Capstones

The present study experimentally manipulated the demographic characteristics of the subjects of moral dilemmas such that they were 20%, 40%, 60%, and 80% demographically similar to participants. Participants rated each of these individuals on a novel measure of perceived inherent value, the Perceived Inherent Value Scale (PIVS) and responded to a series of moral dilemmas using the Consequences, Norms, and preference for Inaction (CNI) model of moral decision making where the subjects of the moral dilemmas were the 20%, 40%, 60%, and 80% similar individuals. Participants rated individuals who were more demographically similar to themselves as having greater perceived inherent …

Deciphering The Crl Code: Novel Mechanisms Of Canonical And Non-Canonical Ubiquitylation, Nicholas Wayne Purser

UNLV Theses, Dissertations, Professional Papers, and Capstones

Protein degradation is a fundamental process required for maintaining cellular homeostasis in eukaryotic organisms. In humans, distinct cell types exhibit unique proteomic landscapes that are dynamically balanced by the continual synthesis and degradation of proteins. The timely removal of damaged, misfolded, or old proteins is essential to permit new protein synthesis and to ensure proper cellular function.

Central to this regulatory network is ubiquitylation, a highly conserved posttranslational modification system that governs protein stability and function across all eukaryotic cells. Through the covalent attachment of ubiquitin molecules to protein substrates, this system modulates a broad range of biological processes, including …

Hypervigilance In Emerging Adulthood: The Impact Of Trauma, Milestone Achievement, And Minority Identity, Alexis Rice

UNLV Theses, Dissertations, Professional Papers, and Capstones

Emerging adulthood is a critical developmental period marked by identity exploration, increased autonomy, and heightened vulnerability to societal pressures. This mixed methods study examined how hypervigilance: a heightened state of alertness often associated with trauma and minority stress- varies by gender, sexual identity, racial trauma exposure, and adulthood milestone achievement among emerging adults aged 18–29. A total of 369 participants completed measures assessing hypervigilance behaviors, adulthood milestone attainment, and trauma exposure. Quantitative analyses revealed that sexual and gender minority (SGM) individuals and cisgender women reported significantly higher levels of hypervigilance compared to their counterparts. Witnessing trauma inflicted on someone of …

Navigating Leadership In Bilingual Education: Exploring The Preparation, Experiences, And Adaptability Of Bilingual Education Leaders In The Southwest, Cynthia Romero

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study explored the experiences of school-level bilingual program leaders in the Southwestern United States, focusing on how their preparation, lived experiences, and local contexts shaped their leadership practices and decision-making. Drawing on Bourdieu’s theory of practice, the research examined how habitus and various forms of capital (cultural, social, and symbolic) influenced leaders’ approaches to developing and sustaining bilingual programs. Yosso’s theory of community cultural wealth (CCW) further expanded this lens by highlighting the aspirational, linguistic, familial, social, navigational, and resistant forms of capital.

Using a qualitative multi-case study design, the research analyzed policy documents, leadership preparation coursework, and semi-structured …

Telling Herstory: The Preparation, Perspectives, And Persistence Of Novice Black Women Principals, Dana Roseman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Being a Black Woman public school principal is an intensified, all-encompassing yet rewarding role, marked by disparities that our white counterparts are not forced to navigate. Inspired by the daily, distressed calls from novice Black Women principals seeking support in their roles and personal experience, this qualitative study employs the Sista Circle Methodology (SCM) to explore their perceptions of principal preparation programs, professional support, and persistence strategies within the first five years of appointment in a large urban school district. Framed by Black Feminist Thought (Collins, 1990), the study examines the social, gender, cultural, and experiential contexts unique to Black …

First-Principles Insights Into Binary Oxide Systems Under Extreme Pressure, Daniel Schacher

UNLV Theses, Dissertations, Professional Papers, and Capstones

Pressure is powerful tool by which one can manipulate the properties of materials. In this work we utilize pressure to explore binary oxide systems and characterize their structural and electronic properties. The observation of anomalous structural and electronic behavior in the rutile to CaCl2 phase transition in SnO2 led to the prediction that such behavior is inherent to all oxides experiencing such a phase transition sequence.[1] Here, the ultra-wide band gap semiconductor GeO2 is confirmed to exhibit anomalous behavior during the rutile to CaCl2 phase transition. A phase pure rutile GeO2 sample synthesized under high-pressure, high-temperature, conditions is probed using …

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.

Platforms, Privacy, And Power: Examining Predictors Of Online Intimate Information Disclosure And Expression, Alexis Shore Ingber, Danielle Keats Citron, Jonathon W. Penney

Articles & Book Chapters

When intimate privacy is violated, self- and relational development is impaired to the detriment of individuals and society. Despite these costs, there is a lack of systematic empirical and theoretical study of intimate privacy and efforts to protect it. This research helps fill this void through two complementary studies. Through a longitudinal experimental design, results from Study 1 highlight that partner trust and response-efficacy were not only positively predictive of online intimate disclosure, but also strengthened following knowledge of intimate privacy protections. In Study 2, we find individuals are more likely to engage in public-facing online sexual expression if the …

Extracellular Matrix-Mycaf Signatures Correlate With Resistance To Neoadjuvant Apd-L1 Immune Checkpoint Inhibition With Durvalumab + Metformin In Hpv+ Hnscc, Pablo Llerena, Hani Samarah, Kathryn Nunes, Zhao Lin, Kelly Bridgham, Sruti Tekumalla, Amiti Jain, Larry A. Harshyne, Sanket Kumar Shukla, Ioannis Vathiotis, Madalina Tuluc, Stacey Gargano, John R. Eisenbrey, Scott W Keith, David Cognetti, Voichita Bar-Ad, Adam J. Luginbuhl, Rita S. Axelrod, Rajanikanth Vadigepalli, Hushan Yang, Diana Whitaker-Menezes, Megan Roche, My G. Mahoney, Athanassios Argiris, Charalambos C. Solomides, Jennifer Johnson, Md, Mouadh Barbirou, Amanda Miller, Andrew P. South, Ramkrishna Mitra, Alban J Linnenbach, Ubaldo E. Martinez-Outshoorn, Joseph Curry

Department of Otolaryngology - Head and Neck Surgery Faculty Papers

PURPOSE: Immune checkpoint inhibitors (ICI) have demonstrated clinical benefit in head and neck squamous cell carcinoma (HNSCC); however, single-agent efficacy is limited, leaving significant unmet needs. Metformin may synergize with ICIs, offering promise to improve response rates. We leveraged multiomic data from a randomized, presurgical neoadjuvant trial (NCT03618654) evaluating a single infusion of the anti-PD-L1 ICI durvalumab with or without daily, standard dose metformin in previously untreated, nondiabetic patients with HNSCC to understand predictors of response and the effect of combination therapy.

PATIENTS AND METHODS: Clinical, pathologic, and correlative data were analyzed to investigate response and resistance mechanisms. We present …

Medical Cannabis Conversation Between Adult Oncology Patients And Provider: The Impact Of Provider Education, Jodi Mcclain

DNP and Student Works

Background: It is estimated up to 40% of adult oncology patients use medical cannabis (MC) for a myriad of symptoms, including not limited to, nausea, pain, appetite, and anxiety. Conversely, less than one-third of oncology health care providers (HCPs) feel confident making cannabis recommendations. Furthermore, studies have shown low disclosure rate and poor communication between oncology patient and provider regarding integrative medicine, which includes cannabis. This study sought to examine the degree of correlation between the desire for information regarding cannabis in the adult oncology population, the level of communication regarding cannabis between patients and providers, and educational efforts to …

Results Of The 2024 Immunization Status Survey Of 24-Month-Old Children In Tennessee, Tennessee. Department Of Health.

Immunization Rates

No abstract provided.

Back To Normal? Perspectives Of Faculty And Teaching Librarians On Information Literacy Instruction After The Lockdowns, Catherine Baird, Cara Berg, Anthony C. Joachim, Drew Wallace

University Libraries Scholarship and Creative Works

Objective - While LIS scholars have extensively studied the widespread disruptions to library instruction during the lockdown period of the COVID-19 pandemic, there is a relative dearth of research concerning the longer-term implications for teaching information literacy (IL). This exploratory survey sought to examine how faculty have introduced IL skills to students before, during, and after the COVID-19 lockdowns. After returning to in-person operations in 2021, the authors observed a change in how faculty have engaged with libraries to teach IL to their students. Methods - Utilizing parallel survey instruments, we asked faculty and librarians for their perceptions of current …