Digital Commons Network^™

Towards High-Efficient Broadband Omnidirectional Light-Trapping: Discrepancy-Assisted 2d/3d Deterministic Quasi-Random Nanostructure Design, Optimization, And Fabrication, Yihong Zhao

UNLV Theses, Dissertations, Professional Papers, and Capstones

Recently, nano-scaled surface decoration has brought significant advancement and exciting new possibilities to light management. Numerous nanostructure patterns have been explored, wherein the quasi-random nanostructures (QRNs) present a promising path in manipulating light to increase the photon flux over the broadband spectra for optical (e.g., photovoltaic) devices. However, due to the infinite number of QRNs, it is difficult to directly design and fabricate the exact QRN pattern as desired to achieve the optimized light-trapping capability. To overcome this obstacle, we 1) digitize the traditional continuous QRNs into meshes and then map the meshes to binary matrices, which can be deterministically …

Vaccinator Communication Interventions To Address Hpv Vaccine Hesitancy, Joann Rupiper

UNLV Theses, Dissertations, Professional Papers, and Capstones

Human papillomavirus (HPV) vaccination is an effective public health tool to decrease the rates of HPV-related cancers in our communities. Vaccine hesitancy can undermine this effort, and interventions are needed to inform and assist individuals/parents in decision-making to receive vaccines. The COVID-19 pandemic and newly developed vaccines have increased attention and made families hesitant about vaccines. Receiving a provider's strong recommendation for the vaccine is one of the strongest predictors of HPV vaccine uptake. However, not all providers have the knowledge and skills to provide the best approach for families and patients. The primary communication method has been the presumptive …

Utilizing Nonparametric Statistical Methods To Inform Equitable And Inclusive Mtss Models Of School Attendance/Problems, Victoria Bacon

UNLV Theses, Dissertations, Professional Papers, and Capstones

School attendance/problems are a key focus of educational policy. Critical approaches to educational policy stress the importance of nontraditional methods that are inclusive of the needs of students from marginalized or minoritized groups. Students in these groups are already at an increased risk for school attendance problems due to complex systems interactions, and bolstering protective factors at the school level may be one way to promote inclusivity and equity. MTSS models are well suited to address attendance, and bolstering protective factors on a large-scale would fall under Tier 1 preventative efforts. School climate is one such protective factor that could …

Bidirectional Testing For Repairable Systems Reliability: Power Asymmetries, Panel Of Control Charts, And Reliability Graphics, Sung Keun Koo

UNLV Theses, Dissertations, Professional Papers, and Capstones

To a practitioner who chooses to be on the safe side, we offer an option between a cocktail of tests and a solo one-size-fits-all test as a needed antidote to power asymmetries. Two bidirectional tests are first established to empower a basic pair of tests as asymmetrical performances. Unsurprisingly, we’ve seen either bidirectional device championing in one alternative setting, but also being turned against the very setting altered with just one of the composed elements. Progressing by filtering out the bad and enhancing the good, we assemble a hybrid from the empowered pair to restore power symmetries that are thought …

Polar Alignment Of Massive Retrograde Circumbinary Discs, Charles Abod

UNLV Theses, Dissertations, Professional Papers, and Capstones

To understand the observed circumbinary planetary systems, we must first explain the dynamics of the circumbinary discs in which they formed. Observations of circumbinary discs show that misalignments to the binary orbital plane may be common. Here we investigate these systems by exploring the orbital dynamics of three-body systems and circumbinary discs. A test particle orbit around an eccentric binary has two stationary states in which there is no nodal precession: coplanar and polar. Nodal precession of a misaligned test particle orbit centres on one of these stationary states. A low mass circumbinary disc undergoes the same precession and moves …

Repeating Patterns: Does Emotional Child Abuse Lead To Intimate Partner Abuse?, Kathryn R. Henry

UNLV Theses, Dissertations, Professional Papers, and Capstones

Childhood abuse and intimate partner abuse (IPA) are serious issues in the United States This study examines the correlation between emotional childhood abuse and IPA. Anyone regardless of gender, race, or socioeconomic status may be a victim of childhood abuse or IPA. One in seven children are victims of childhood abuse, which results in a lifetime cost of $428 billion. The costs of IPA are even higher and estimated by the CDC (2020) to be near $3.6 trillion as 25% of women and 20% of men have been victims of IPA. Previous research has found a connection between childhood maltreatment …

Investigating Conserved Mechanisms For Embryonic Eye Regrowth In Xenopus Laevis, Cindy Kha

UNLV Theses, Dissertations, Professional Papers, and Capstones

Regeneration is a complex process to replace or restore tissue after damage. However, animals vary in their ability to regenerate tissue, and humans are limited in their abilities. Understanding how regeneration occurs in highly regenerative vertebrates, such as in Xenopus laevis frogs will lead to defining common regeneration mechanisms. In recent years, eye regeneration research in Xenopus laevis tadpoles provided new promising insight into the mechanisms necessary for repair of damaged eye tissue. Much progress has been made towards understanding the regenerative capability of the complex eye since Xenopus tadpoles can regenerate mature eye tissues, including: the optic nerve, retina, …

Cognitive Testing For Sport Concussion: The Immediate Post-Concussion Assessment And Cognitive Testing (Impact), Julia E. Maietta

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sport concussion is among the most common injuries for an athlete to experience during sport participation. Because of the complex pathophysiological process that affects the brain during and after concussion, symptoms can be heterogeneous in presence and severity. Although most acute symptoms (e.g., headache, slowed processing speed, loss of consciousness, irritability, depression, anxiety) resolve within seven to 10 days for most athletes, there is evidence that higher initial symptom burden and other genetically based differences can lead to longer symptom duration and complicated recovery post-concussion. Because structural changes that commonly occur as a result of concussion (e.g., diffuse axonal injury) …

Pre-Service Teacher Perceptions Of Persistently Challenging Behaviors, Swpbis, Cico And Student-Teacher Relationships, Elizabeth Lynn Messina

UNLV Theses, Dissertations, Professional Papers, and Capstones

Teacher perceptions of behaviors have a large impact on the quality of student-teacher relationships. Such relationships trickle down and affect academic and social-emotional-behavioral performance. With the wide prevalence of School-Wide Positive Behavioral and Intervention Support (SWPBIS), questions about why there is not a greater efficacy in improving relationships and related outcomes are being raised. While it is widely documented that teachers often have negative perceptions of children with Persistent Challenging Behaviors (PCBs), the origins of such perceptions are unknown. Additionally, the use of SWPBIS is also widely used (Sugai et al., 2008); however, knowledge of SWPBIS in such sufficiency as …

Predictor Of Hospital Closure In The United States, Haniyeh Shariatmadari

UNLV Theses, Dissertations, Professional Papers, and Capstones

Hospital closures have recently been more common and a crucial concern in the United States since they can influence many aspects of patients' health conditions. This situation has led many scholars to investigate the adverse effect of hospitals closure. Previous research has well documented the effects of a hospital closure. However, there is a lack of studies on the predictor of a hospital closure. To fill this gap, the objective of this longitudinal study is to explore organizational and market factors associated with hospital closure. We used Data from the American Hospital Association (AHA), the Centers for Medicare and Medicaid …

An In-Depth Examination Of The Literature On Early Pubertal Timing And Disordered Eating In Women And Girls: A Systematic Review And Meta-Analysis, Megan Marie Shope

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: Extant data indicate that earlier onset of puberty increases risk for disordered eating symptoms in girls and women. However, whether earlier pubertal timing is predictive of all disordered eating symptoms, or whether it exerts differential effects across distinct symptoms (e.g., body dissatisfaction versus binge eating), remains unclear given inconsistencies in the literature and the lack of a systematic analysis. A meta-analytic approach can overcome these limitations by providing pooled estimates of early pubertal timing on disordered eating symptoms and testing for methodological moderators (i.e., disordered eating outcome/symptom type, measurement of pubertal timing, age of sample, type of sample, study …

Scientific Collaboration And The Cold War: 1945-1970, Autumn Wyland

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis is an examination of scientific collaboration between 1945 and 1970, covering the end of World War II and through the early stages of the Cold War. Prior to the Second World War, scientific collaboration was frequent and necessary to development and research. World War II created a new atmosphere of secrecy, preventing scientists from collaborating as they once had. This paper examines what that collaboration looked like, how it was derailed and why, how some scientists sought to return to collaboration, sometimes at personal expense, and finally what those effects looked like throughout the Nuclear Age and Space …

Combining Positive Behavioral Intervention And Supports With Cultural Responsiveness: A Framework To Reduce Teachers’ Cultural Bias And Decrease Discipline Disproportionality Among Black Elementary Males, Jaymes Aimetti

UNLV Theses, Dissertations, Professional Papers, and Capstones

Throughout the United States and the world, public schools are becoming more culturally diverse. Therefore, teachers and school administrators need to build the foundation to clearly understand students and their families. In this study, three questions will be explored (1) How does professional development in cultural responsiveness affect teachers’ viewpoints in how they work with their Black elementary male students based on the CISA survey? (2) How are the number of Black elementary male students’ discipline incidents from the beginning of a school year changed after teachers receive culturally responsive professional development? (3) What will the CISA survey reveal on …

Purchase Intentions For Hospitality Products With Negative Online Reviews: The Joint Effects Of Rating Disadvantage, Attitude, And Sales Promotion, Wenjia Han

UNLV Theses, Dissertations, Professional Papers, and Capstones

Consumers engage with online reviews when making purchase decisions, especially for experience goods such as hospitality services. Negative online reviews (NOR) harm business revenue and hospitality operators try to minimize the consequence by responding to NOR. However, management responses are hard to implement and could generate adverse effects. This study suggests that the impact of NOR on product choice can be eradicated by launching an appropriate sales promotion. Based on prospect theory, choice theory, social judgment theory, and cognitive dissonance theory, this study examines how different proportions of NOR influence consumer purchase intention for two hospitality sectors – restaurant and …

A Feasibility Study To Identify If The Induction Of The Relationship Based Care Program Enhance The Caring Skills Of Registered Nurses?, Jennifer Millet

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this Doctor of Nursing Practice project was to educate the Registered Nurses (RNs) to implement the Relationship Based Care (RBC) model and Jean Watson’s Theory of Human Caring principles into their practice. The model and principles were put into practice by the RNs, followed by examining the RNs perception and practices of caring and confidence skills had improved after the intervention. The mission of this project was to promote quality outcomes and patient satisfaction through caring relationships. Strengthening these relationships will help the caregiver experience the essence of care and be able to better connect to another …

What You See You Perceive: Public Opinions Of Potential Negative Consequences And Support For Officer Body-Worn Cameras, Jordyn Marian Sanders

UNLV Theses, Dissertations, Professional Papers, and Capstones

Officer-body worn cameras (BWCs) are used in policing to provide visuals from the perspective of the officer during interactions with the community. BWCs are often promoted for the ability to improve the relationship between the community and police by providing accurate and transparent accounts of the interactions. Millions of dollars have been spent to distribute BWCs to police departments across the Unites States, with an estimated 80% of departments implementing the devices through various policies and procedures (White & Malm, 2020). Most studies on BWCs have provided empirical evidence showing the potential benefits of the devices in policing (Lum et …

Design And Fabrication Of An Apparatus For Tao High-Resolution Laser Spectroscopy, Timothy Chung

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this study, an apparatus for the high-resolution laser spectroscopy of molecules is designed and constructed. The apparatus is used to identify TaO transitions, but may be used for any other molecular species in the future. It will also later be used for experiments such as quantum logic spectroscopy, which are enabled by attachable chambers that can be supplied with molecules from the apparatus. Several considerations are made to improve the quality and longevity of the apparatus such as regulating the rovibrational states of the produced molecules, optimizing the linewidth of the ionization lasers, reducing noise from sources such as …

Lawrence T. Odom: Techniques And Commentary On Arranging For The Wind Band, Clinton L. Williams

UNLV Theses, Dissertations, Professional Papers, and Capstones

Orchestral works transcribed for wind and percussion ensembles have been a standard component of the performance literature throughout the twentieth century to the present. Though an increasing number of composers were beginning to write original works of merit for wind bands during the mid-twentieth century, selections from the orchestral canon remained a staple of secondary school, college, community, and military wind and percussion ensembles.

This study analyzes the textural, rhythmic, and harmonic elements of Lawrence T. Odom’s transcription techniques used arranging masterworks for the United States Air Force Band from 1958 to present day. He transcribed over three hundred orchestral …

Direction Of Attentional Focus In Prosthetic Training: Current Practice And Potential For Improving Motor Learning In Individuals With Lower Limb Loss, Alexander Bonczyk, Maria Katrina Tillada Dimapilis, Sarah Partridge, Samantha Ruiz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: Adopting an external focus of attention has been shown to benefit motor performance and learning. However, the potential of optimizing attentional focus for improving prosthetic motor skills in lower limb prosthesis (LLP) users has not been examined. In this study, we investigated the frequency and direction of attentional focus embedded in the verbal instructions in a clinical prosthetic training setting.

Methods: Twenty-one adult LLP users (8 female, 13 male; 85% at K3 level; mean age=50.5) were recruited from prosthetic clinics in the Southern Nevada region. Verbal interactions between LLP users and their prosthetists (mean experience=10 years, range=4-21 years) during …

Essential Tools For Sustainability Of A Student-Led, Pro-Bono Back School, Cory Brown, Rosalie Gutierrez, Jennifer Montes, Rondale Scruggs

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: In 2018, University of Nevada Las Vegas Doctor of Physical Therapy (DPT) students and faculty, in cooperation with a community partner, created a student-led pro bono Back School to address a gap in healthcare for underinsured individuals with low back pain in Southern Nevada. To support the sustainability of the Back School, the authors of this paper set out to develop a student club to recruit and train DPT students to volunteer in the program using a specifically designed electronic training manual. Overall, the aim was to encourage students to join the new club's leadership team to prepare future …

Increasing Utilization Of Otago Fall Prevention Program By Nevada Physical Therapists: A Service-Learning Project, Jared Apostol, Erica Mooy Brown, Danielle Uptain

UNLV Theses, Dissertations, Professional Papers, and Capstones

Otago is an evidence-based program that is designed to reduce falls in community dwelling older adults by individualizing an exercise program with three key components: strength, balance, and a walking program. Unfortunately, Nevada clinicians do not utilize the program frequently or entirely with patients in outpatient and/or home health physical therapy. Evidence shows it reduces fall risk, but it has barriers to implementation in the United States. The barriers to integration are primarily due to the plan of care that stems from a 12-month timeframe and several phone call appointments which does not fit well in the American healthcare system. …

Effects Of A Remote Exercise Intervention On Aerobic Endurance In Individuals With Down Syndrome, Andrew Murata, Elena Wolf, Jonathan Crimm, Benjamin Lee

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: Down syndrome (Ds) or Trisomy 21 is a common genetic birth condition, and those with Ds typically display decreased cardiorespiratory fitness compared to those without Ds, potentially leading to an increased risk for cardiovascular conditions and mortality. Low cardiorespiratory fitness is partially caused by low physical activity levels in this population. The COVID-19 pandemic caused community-based activity programs to shut down, as individuals with Ds are at increased risk for COVID-19 hospitalization and death. Thus, it was vital to explore alternatives of in-person exercise during the pandemic. The purpose of this study was to investigate the effects of a …

Perceived Value Of Acute Care Physical Therapy, Juliana Amenta, Andrew Falcinelli, Erin Heenan, Hannah Kendall

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background/Significance/Objective: Although there is some research regarding physical therapy in the acute hospital setting, much of it is focused on the role physical therapists play with specific patient populations or diagnoses. By understanding more about how physical therapy services can add value in the acute hospital, their skills could be better utilized to maximize benefit for both individual patients and the hospital. The purpose of this study was to investigate the perceived value that physical therapists bring to the acute care hospital from the perspective of both physical therapists and their supervisors in Southern Nevada.

Methods: This study used an …

Walking With Poles Improves Step Length Of Simulated Prosthetic Gait, Marissa Elquist, Daniel Perez, Jonathan Garcia, Brady Owens

UNLV Theses, Dissertations, Professional Papers, and Capstones

Individuals with lower limb loss often demonstrate gait deviations which cause instability and asymmetry. Walking with poles has been shown to improve stride length and stability in older adult and other patient populations. The enhanced arm involvement in bipedal walking with poles has the potential to facilitate interlimb coordination among arms and legs, and therefore is likely to improve prosthetic gait. The purpose of this study was to examine the effect of walking poles on temporal gait parameters and the center of mass (COM) displacement during prosthetic and simulated prosthetic gait. It was hypothesized that walking with poles would improve …

Effects Of A 12-Week Telehealth Exercise Intervention On Gait Speed And Gait Deviations In Adults With Down Syndrome, Robert Lum, Taylor Souza, Christopher Roys, Daniel Stopka

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Down syndrome (Ds) is associated with impairments affecting overall motor development including gait pattern and speed. Research on the effects of exercise on adults with Ds is lacking. The purpose of this study is to evaluate the effects of a 12-week telehealth exercise program on gait impairments in adults with Ds.

Methods: Twenty participants performed a 12-week telehealth exercise program based upon a diagnosis-specific procedure developed by Sarah Mann, PT, DPT. Gait deviations were assessed with the Ranchos Los Amigos Observational Gait Analysis. Comfortable gait speed was evaluated with the 4-meter walk test.

Results: Improvements in comfortable gait speed …

Factors Predicting Fear Of Falling Avoidance Behavior In Parkinsonisms, Kameron Eckard, Franjo Vukojevic, Ryan Hammar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Fear of falling avoidance behavior (FFAB) is common in parkinsonisms and results in potentially mitigable downstream consequences.

Objective: Determine the characteristics of individuals with parkinsonisms most associated with FFAB.

Methods: A retrospective, cross-sectional study was conducted from medical records data of 142 patients with parkinsonisms. These data included: demographics (age, sex), disease characteristics (Movement Disorders Society – Unified Parkinson’s Disease Rating Scale Part III (MDS-UPDRS III), years since diagnosis), fall history (number of fall injuries in previous year), and gait and balance function (five times sit to stand, MiniBESTest, Timed Up and Go (TUG), dual-task TUG, ten-meter walk test …

Efficacy And Benefits Of Providing A Screening Clinic For Performing Arts Students, Shaun Bean, Joanna Centeno, Elizabeth Williams

UNLV Theses, Dissertations, Professional Papers, and Capstones

In past years, University of Nevada, Las Vegas physical therapy students (UNLVPT) have provided UNLV dance students with screening clinics, injury evaluations, and treatment sessions to help address their need for direct and specialized services. Through this project, UNLVPT has worked to help reduce injury risk in dancers and provided treatment and rehabilitation for injuries that have occurred. Due to the COVID-19 pandemic, our group was unable to treat dancers in person over the course of the 2020-2021 school year. In response to these limitations, we worked to reformat our screening process to make it practical in a virtual setting. …

Development Of Online Modules To Introduce Prospective Students To The Profession Of Occupational Therapy, Hosia Towery

UNLV Theses, Dissertations, Professional Papers, and Capstones

Prospective students interested in Occupational Therapy academic programs are subject to the admission criteria of each educational institution, including experiential learning, clinical observation hours, volunteer experiences, or similar prerequisites. There are no standardized criteria established for these prerequisite requirements b the accreditation agency, as it is within the scope of Higher Education. There is no accountability at the regional or local level to ensure educational opportunities for prospective students interested in higher education, creating a gap as highlighted in the recent global pandemic, where student access to education was further challenged. Students are reliant on a variable set of requirements …

The Road Ahead: An Occupational Therapy Manual To Infant Development For Parents In The Nicu, Nicole Suzuki-Uyeno

UNLV Theses, Dissertations, Professional Papers, and Capstones

Occupational therapists have been collaborating with the parents of our tiniest patients in the neonatal intensive care unit (NICU) for quite some time. They have a wealth of information and expertise in the area on infant development and parent education. Admitting a baby to the NICU is a shock for most parents and can take a toll on a family. The role of the occupational therapist is to help educate the family and to provide the tools to safely take care of their baby and to smoothen the transition from the hospital to home.

In the NICU, the OT has …

Diurnal Regulation Of Exercise-Induced Myocardial Signaling And Transcription, Charli Aguilar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Exercise is well known for its many benefits on the body and most notably the heart. Recent emphasis, and significant resources, have been dedicated to elucidating the molecular mechanisms through which exercise exerts its pluripotent beneficial effects on health and the prevention of disease. A continuous evolution in this field has sought to modulate and optimize exercise in various ways to maximize the benefits. In recent years, a growing appreciation for the impact of circadian rhythms has gained traction and their influence on many essential biological functions have been integrated into exercise physiology (i.e. - chrono-exercise), as well as …