Digital Commons Network^™

Viability Of Energy And Fuel Sources For Interstellar Travel; Design And Feasibility Of The Construction Of Manned Interstellar Space Shuttles, Lukas Mittelman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The importance of proving the viability of interstellar transport and addressing its potential hazards and pitfalls is immense. If we do not look toward the future and examine what could be waiting for us, we are doing our children, our children’s children, and so on, a disservice. Here we must attempt to lay the groundwork for our future scientists, engineers, and adventurers. Asking and answering questions like, which propulsion and energy systems must we incorporate to send us through the cosmos? Will we utilize technologies known today, such as fossil fuel rockets, fission or fusion rockets, and antimatter drives (pion …

Increasing Human Papillomavirus Vaccination Intent And Knowledge Through An Educational Intervention, Angelica E. Musumeci

UNLV Theses, Dissertations, Professional Papers, and Capstones

Human papillomavirus (HPV) is a widely discussed topic in healthcare as it affects patients of all genders and ages who partake in sexual activity. The most significant concern it poses to those at risk is HPV-related cancer. Fortunately, a vaccination exists that targets specific strains associated with these types of cancers. Despite evidence-based research supporting the vaccination’s efficacy and safety, lack of awareness and misinformation diminish the receipt of the vaccine and drive the lack of protection. Thus, educational interventions directed at parents and caregivers, which aims to improve their understanding of HPV and the vaccination’s benefits, is key to …

The Effects Of Transcranial Direct Current Stimulation On Motor Learning In Complex Motor Tasks, Milan Pantovic

UNLV Theses, Dissertations, Professional Papers, and Capstones

Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has emerged over the past 10-12 years as safe, affordable, portable, easy to use, and potentially efficacious adjuvant training intervention in several aspects of human performance. tDCS has been shown to be able to improve both cognitive and motor function in a wide variety of populations such as young adults, older adults, stroke, Parkinson’s disease, and many others. However, the majority of tDCS research has been conducted in the motor system of healthy young adults, which will also be the focus of this dissertation.The basic effects of tDCS …

Neo Development Of The Workplace Environment In Response To Evolutionary Social Changes, Dafne Odette

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study is to identify the needs and wants of remote workers to support their health and well-being in response to evolutionary social changes. Many workers were once tethered to live in the city where their job office resided. Additionally, economic forces have long been a deciding factor in where one lives. The COVID-19 virus of 2020 provided an opportunity for many people to work remotely to control the virus (Latham, Higgins, & Judish, 2020). This has allowed people to retain higher salaries while living in rural areas where the cost of living may be lower. In 2021, some businesses …

Evaluation Of An Advance Care Planning Workshop To Improve The Self-Efficacy Of Health Care Providers, Joy Patrick

UNLV Theses, Dissertations, Professional Papers, and Capstones

Advance care planning (ACP) involves discussions between the patient and their care providers and those close to them about future care. Every patient is entitled to ACP; however, research has shown that providers do not regularly implement them for various reasons. In addition, multiple barriers may be preventing providers from initiating ACP. Among them are lack of knowledge and confidence, apprehension, time, and fear. This Doctor of Nursing Practice (DNP) addresses the problematic barriers to regular ACP discussions between providers and the patients. Specifically, the purpose of this DNP project is to develop, implement and evaluate an online module to …

Differential Expression Of Cellular And Exosomal Microrna Isolated From Oral Cancer Cells And Their Resistance To Chemotherapy, Brady Petersen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: MicroRNAs are abundant small non-coding RNA with a variety of known functions, including transcriptional activation and inhibition. Recent evidence has suggested that microRNA expression may influence the responsiveness of some cancers to chemotherapy, including liver and lung cancers. Some evidence has now suggested that specific microRNAs, such as miR-21, miR-155, and miR-375, may influence oral cancer responsiveness to chemotherapy – although much remains to be discovered.

Objective: Based upon the lack of evidence in this area, the primary objective of this study was to evaluate microRNA expression and responsiveness among oral cancers.

Methods: Five commercially available oral cancer cell …

Student-Athletes’ Career Adaptability, Academic Motivation And Athletic Motivation, Alexandria N. Petrolia

UNLV Theses, Dissertations, Professional Papers, and Capstones

Many Division I student-athletes find the transition of graduating college, leaving the athletic arena, and entering the workforce to be extremely challenging to navigate. Due to the high demands of being an elite athlete and the prospect of continuing to compete professionally after graduation, an overwhelming majority of student-athletes expend little to no effort in exploring potential careers and are unlikely to take advantage of the opportunities available to them prior to graduation. This study aimed to examine the relationship between athletic career motivation, athletic motivation, and academic motivation to the skills necessary to navigate work responsibilities in career adaptability. …

Identifying Gaps In Social Determinants Of Health Among Patients 65 Years And Older With Congestive Heart Failure: A Secondary Data Analysis, Sandra Pierre-Louis

UNLV Theses, Dissertations, Professional Papers, and Capstones

Congestive heart failure (CHF) is one of the most common healthcare problems for older adults. Because of its high and rising prevalence in this population and its significant influence on healthcare costs and quality of life, CHF is becoming a serious public health issue in the United States. More effective strategies for preventing and managing CHF in older people are desperately needed (Rich, 2015). The disease accounts for 3% of hospital admissions in the United States and affects more than 6.5 million Americans (White-Williams et al., 2020). Further, CHF is exacerbated by adverse social determinants of health (SDOH). This study …

Development Of Uav-Based Rail Track Geometry Irregularity Monitoring And Measuring Platform Empowered By Artificial Intelligence, Lihao Qiu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Rail tracks need to be consistently monitored and inspected for problems associated with rust, deformation, and cracks that, at their worst, can cause catastrophic train derailments. Many non-destructive testing approaches have been explored and extensively utilized to help inspect rails’ health, but most of them require intensive human power and/or heavy sensor systems (e.g. total stations, manual/car-mounted trolly, etc.) that are not efficient or convenient to cover a long range of rails and may interfere with the normal operation of trains.In light of the rapid development of unmanned aerial systems/vehicles (UAS’s/UAVs) and high definition photographic and optical distance measuring sensors, …

Jazz Sampling Hip Hop: A View Of The Expanded Rhythm Section And The Musical Interactions Between Musicians And Machines, Molly Kaylynn Redfield

UNLV Theses, Dissertations, Professional Papers, and Capstones

This document presents a study on a musical fusion that I term “jazz/hip hop.” The study presents a historical overview of jazz/hip hop origins beginning with 1960s beat poets to jazz/hip hop artists emerging in the early 2000s. Modeled after Phillip Tagg’s and John Fiske’s semiotic methodology and William C. Banfield’s African American Cultural Theory and Heritage Model, the methodology defines the musical and cultural aesthetics of jazz/hip hop. Interviews from jazz/hip hop artists are presented; justifying the use of hip-hop aesthetics and countering the argument that commercial elements are added for mainstream recognition. I examine that samples musically interact …

In The Image Of… Towards A Trans Talmud, Laurence Myers Reese

UNLV Theses, Dissertations, Professional Papers, and Capstones

In the Image of... (towards a Trans Talmud) is a body of work by artist Laurence Myers Reese that works to examine Jewish paradigms of gender through the transgender lens. Reading the archive diagonally, he examines historical Jewish writings, from poet and Rabbi Kalonymous Ben Kalonymous to “false Messiah” Shabbatai Tzvi. Contextualizing contemporary Jewish with notable exhibitions from the Jewish Museum New York and Spertus Museum, Chicago, In the Image of… draws from artists, writers, and Rabbis who use a gendered lens to interrogate Judaism. These include Yael Kanarek, who has worked to re-gender the entire Torah, Rena Yehuda Newman, …

Regional Health Benefits Of The Nevada Renewable Energy Initiative, Alireza Rezaee

UNLV Theses, Dissertations, Professional Papers, and Capstones

In recent years, there have been tremendous efforts to replace fossil fuels with renewable energy to mitigate emissions of greenhouse gases and air pollutants in the United States. Nevada was among the first states that established the renewable portfolio standards (RPS), requiring a certain percentage of electricity sold to the customers for consumption coming from renewable resources. The recent Nevada Senate Bill 358, signed by Nevada’s Governor in 2019, set a target that by 2030 not less than 50% of electricity sold in Nevada should come from renewable resources. This research investigates how this Bill could provide health benefits for …

Characterization Of Physical And Dosimetric Aspects Of Srs Hyperarc Treatment Technique, Emma S. Rickels

UNLV Theses, Dissertations, Professional Papers, and Capstones

HyperArc is a radiation therapy planning technique using stereotactic radiosurgical doses delivered via single isocenter volumetric modulated arcs (VMAT) for multi-lesion brain cancer. Due to the nature of these types of treatments it is imperative that the proper quality assurance is completed to ensure the safety of the patient. Geometric limits were assessed using a dose volume histogram (DVH) and known rotational errors of theoretical lesions of different dimensions and lengths from the isocenter. Dosimetric comparisons were evaluated using an ion chamber and Gafchromic EBT-XD film and portal dosimetry. The conclusions from these investigations were that patient rotation will result …

A Performance Guide For Four Songs By Francisco Mignone, Amanda Mara Rizzotto Vidal Pessoa

UNLV Theses, Dissertations, Professional Papers, and Capstones

The scope of this document is to demonstrate the richness and diversity to be found in the art song genre from countries outside of the standard repertoire, specifically focusing on the Brazilian composer Francisco Mignone. The purpose of this document is to provide performance practice guidelines for four selected pieces by Francisco Mignone: No Meio do Caminho (1938), Pregão (1947), Si eu sei o que é saudade (1976), and Valsa-Vocalise (1972). They exemplify expressions of Brazilian national identity through the music selected. Furthermore, it provides a brief background on the composer and his compositional style phases, and context for the …

Locating A Marketplace At The Ancient Maya City Of Lakamha’, Mexico Using The Configurational Approach, Jonathan Roldan

UNLV Theses, Dissertations, Professional Papers, and Capstones

In some cases, plazas that undergo archaeological testing for marketplace activity are identified using a method known as the configurational approach. This preliminary research method compares plaza locations to a list of associated features, often treated as a list of criteria. However, this approach has been criticized for its speculative nature and the equifinality of the results. Additionally, some argue that these “criteria” are only a list of assumptions. Until now, the configurational approach has received little attention due to its limitations and speculative nature, yet it remains an integral part of the preliminary process in marketplace research. This project …

Evidence-Based Intervention To Improve Health Literacy Among Older Adults With Newly Diagnosed Atrial Fibrillation, Johana Rowe

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background and Significance: Atrial fibrillation (AFib) is the most common arrhythmia encountered in the healthcare setting. As of 2018, approximately 6.1 million people in the United States were living with AFib which is projected to increase to 12.1 million by 2030. Older adults are at higher risk of developing AFib and its complications. AFib is a chronic condition that requires targeted patient education by healthcare providers in different healthcare settings. Patient’s low health literacy regarding the condition is a significant barrier to therapy adherence. Given the high rate of poor health literacy among individuals newly diagnosed with AFib and the …

Predicting And Mitigating Reactance Impact On Attitude And Behavioral Intention, Matthew Ryan

UNLV Theses, Dissertations, Professional Papers, and Capstones

At times messaging may be of an instructive nature that can be perceived as an attempt to threaten or limit an individual’s freedom. This freedom limitation can range from individual choice to physical requirements. How a message is framed, or positioned, is very important. In certain instances, even when the message has the best intentions, if framed incorrectly can have the opposite, or boomerang, effect on people. This state is known as psychological reactance. When invoked, consumers will act in a way that eliminates the threat of freedom to restore balance. Such a state can also lead to negative implications …

An Integrative Variable And Person-Centered Approach To Representing Teachers' Self-Efficacy: A Cross-Cultural Perspective, Ana Paula Santos Loures Elias

UNLV Theses, Dissertations, Professional Papers, and Capstones

There has been substantial scholarly attention given to teachers’ functioning over the past two decades. Much of this attention has been precipitated by accounts of increasing teacher burnout and attrition from the profession. Central to this scholarly focus has been the construct of teacher self-efficacy, which has been shown to be a predictor of important teacher outcomes. However, there remain several unresolved issues in the teacher self-efficacy literature that limit the utility of the construct for understanding teachers’ effective functioning. First, there is little clarity about the dimensional structure of teachers’ self-efficacy data. Second, little empirical work has been conducted …

New Mathematical Models For Acoustic Insertion Loss Of Fiberglass Lining In Hvac Duct, Michael Anthony Schwob

UNLV Theses, Dissertations, Professional Papers, and Capstones

The design objectives for HVAC air distribution systems are thermal comfort, good indoor air quality, energy efficiency, low construction cost, and appropriate indoor noise levels. The last objective requires that the designer can predict the attenuation of sound transmitted through an air duct. One form of attenuation commonly introduced to an air distribution system to achieve interior noise criteria is fiberglass liner. Past research has been conducted to obtain reliable and accurate insertion loss (IL) data for duct with fiberglass liner. Empirical efforts have relied on limited data sets. Computational efforts have produced numerical models that are not practical for …

Math Identity Experience Of College Students In Developmental Courses: The Effects Of Chronological Multicultural Mathematics, Jonah Shulman

UNLV Theses, Dissertations, Professional Papers, and Capstones

The present grant funded study by the Office of Research and Sponsored Projects investigated the effects of a chronological multicultural mathematics (CMM) framework on math identity and math achievement of student participants enrolled in two virtual post-secondary developmental math courses (N=9). The students were selected due to an inability to pass previous developmental courses or the placement exam to earn entrance into credit bearing math courses. An exploratory mixed methods case study utilized interviews, reflections, surveys, classwork, and grades to arrive at conclusions. Student participants were exposed to supplemental additions to the curriculum that provided elements of past (founders and …

The Unexpected President: An Instrumental Case Study On Women University Presidents, Jessica Soria

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research study sought to examine the experiences of women university presidents. Despite the universal call for the diversification of higher education leadership, women are significantly underrepresented in the seat of the university presidency as higher rank university leadership positions are overwhelmingly occupied by white males. By interviewing women university presidents from diverse backgrounds and from different institutions, this instrumental case study examined their unique experiences. This study utilized two critical theoretical concepts to guide the study: intersectionality and gendered organizations theory.

An Empirical Investigation Into The Impact Of Automated Grading, Alex James St. Aubin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Context: Computer Science enrollment has seen increases in recent years. At the University of Nevada, Las Vegas we have seen an average year to year growth rate of 17.33% in the spring and 13.71% in the fall over the past 10 years in our entry level programming course. These enrollment increases have led to considerable additional costs for grading course material.Objective: The goal of this study is to determine the impact of automatic grading systems on students. If automatic grading is at least as effective as manual grading in practice, it may reduce cost under the context of at least …

The Association Between Neighborhood Social Media Use And Social Cohesion, Sense Of Community And Perceived Safety Among Adults In Clark County, Nevada, Emily Strickler

UNLV Theses, Dissertations, Professional Papers, and Capstones

Place-based health is a concept that suggests where you live has an effect on your health outcomes. Social health factors such as social cohesion, sense of community, and perceived safety are all influenced by the neighborhood environment, and positively associated with health outcomes such as self-reported minutes of physical activity and symptoms of depression. With the increasing popularity of social media sites used specifically for neighborhood purposes, more neighbors are connecting than ever before. The purpose of this study was to determine if use of neighborhood social media sites was associated with the social health factors of social cohesion, sense …

Parental Education On Human Papillomavirus Vaccination, Marguarette J. Suprien

UNLV Theses, Dissertations, Professional Papers, and Capstones

The human papillomavirus (HPV) is a worldwide condition that produces several diseases, including cervical, anogenital, and oral cancer, among others (Fishman et al., 2014). The Center for Disease Control and Prevention (CDC; 2016a) stated that HPV is among the most reported sexually transmitted diseases in the United States. Over 150 viruses are associated with HPV, and 40 types of the virus can be spread via sexual contact, including vaginal, oral, and anal sex (CDC, 2016; CDC, 2016b; CDC, 2016c). Evidence shows that approximately 79 million individuals are infected in the United States, and 14 million Americans are infected with the …

Food Insecurity And Dietary Intake In Adults With Type 2 Diabetes In Southern Nevada, Elizabeth Torres

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background Type 2 diabetes is a major public health issue and food insecurity can affect diabetes management. Food insecurity can contribute to disrupted dietary eating patterns and decreased consumptions of a variety of foods. The aim of this observational study was to determine the difference in dietary intake between food insecure and food secure individuals with type 2 diabetes, as well as by glycemic control. Methods In this cross-sectional study, 55 participants were recruited from an academic endocrinology clinic. Participants completed a 7-day food diary, a household food security questionnaire, and assessment of blood biomarkers (HbA1c). To determine the differences …

Describing Bacterial Mutagenic Hotspots And Signatures Along With The Factors That Drive Them, Carmen Vallin

UNLV Theses, Dissertations, Professional Papers, and Capstones

In my dissertation work, I investigated bacterial mutagenesis. I asked: where do mutations occur in the bacterial genome? What types of mutations occur? What factors promote or prevent mutations? And lastly, how do the answers to these questions change depending on the bacterial life cycle (When)? I used Bacillus subtilis, a Gram-positive bacterium belonging to the phylum Firmicutes, and Escherichia coli, a Gram-negative bacterium belonging to the phylum Proteobacteria, to answer these questions. B. subtilis and E. coli are model systems that have been used to gain insights into fundamental processes of mutations and evolution for nearly ~8 decades. Here, …

The Role Of Peer Relationships In Developing, Promoting, And Maintaining Teachers’ Social And Emotional Competence In The Charter School Setting, Ted Jason Weisman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Social and Emotional Competence (SEC) is comprised of five main components: self awareness, self-management, social awareness, relationship skills, and responsible decision-making. Within the context of K-12 education, SEC is typically explored through the lens of student achievement or student progress. This area of research is noteworthy as teachers aretrained in SEL to assist and support students, not themselves or one another (Wiglesworth et al., 2016). Although teachers may receive training on SEC, the teachers rarely are the focus of that training (Aldrup et al., 2021). One area of particular interest is the setting of charter schools and how they address …

Promoting Paradise: The Recruitment Of Volga German Immigrants To The American Midwest, 1870-1900, Kassidy N. Whetstone

UNLV Theses, Dissertations, Professional Papers, and Capstones

In 1762 and 1763, Russian tsarina Catherine II issued manifestos encouraging foreign immigration throughout Russia, and received an overwhelming response from German farmers. These farmers, who would later be known as Russian Germans, Mennonites, or Volga Germans, quickly gained a reputation for their successful farming skills. As a result, following the Homestead Act of 1862, United States recruiters used promotional land advertisements to entice the farmers to migrate to the Midwest. The posters often depicted “open,” abundant lands in paradise. Upon arrival, however, the Volga Germans faced a reality starkly different from what the advertisements had promoted. This paper analyzes …

Tracing The Shadows Of Gothic Bach: An Overview Of J.S. Bach’S Keyboard Music In American Horror Films, Siyu Yang

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Toccata and Fugue in D Minor, BWV 565, and the Goldberg Variations, BWV 988, have been by far the most prominent of J.S. Bach’s works to evoke evil and horror on screen. This “Horror Bach” association remains exclusively a subculture phenomenon in pop culture (almost universally outside of the classical music world). A historical overview of this cultural phenomenon suggests three factors that made these pieces become horror film music: 1) the popularity of the pieces, 2) the choice of instrumentation, and 3) popular cultural factors. This doctoral document also introduces this pop culture phenomenon of Bach to classical …

Development Of A Model For Affordable Senior Living Community, Nyx Wenlin Zhu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective

An affordable senior living community model must be developed to support the needs of our growing elderly population. Health, safety, and wellbeing depend on equal physical health, social health, and mental or psychological health provisions. As we look at each of these aspects, we must filter physical, social, and mental health based on the abilities of the older population.

Background

The aging population in western societies is one of the biggest challenges of the 21st century and has multiple implications for society, the economy, and other aspects of the community. Aging people who lack family support often require the …