Digital Commons Network^™

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

UNLV Theses, Dissertations, Professional Papers, and Capstones

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

Screening Of Orthodontic Patients And Age-Matched Non- Orthodontic Samples For High-Risk Oncogenic Human Papillomavirus (Hpv) Strains, Hunter Hinton

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: The human papillomavirus (HPV) is known to cause cancer in several tissues and organs, including the cervix and the oral cavity. Several oncogenic or high-risk strains have been identified, which include HPV16 and HPV18.However, other research has demonstrated that additional oncogenic, high-risk strains exist - including HPV31, HPV33, HPV35, HPV52 and HPV58, although much less is known about their prevalence. Based upon this lack of knowledge, the primary objective of this project is to address the prevalence of these strains among pediatric and adult patients through screening of saliva samples from the UNLV-SDM and orthodontic clinic populations.

Methods: The …

Inferring The Compositions And Interior Structures Of Small Planets, David R. Rice

UNLV Theses, Dissertations, Professional Papers, and Capstones

Although there are now over 10,000 confirmed and candidate extrasolar planets, accurate masses and radii have been determined for around 200 planets of less than 10 Earth-masses. This number will grow exponentially over the next decade as extreme precision radial velocity spectrographs see first light. The densities of small planets hint at a diverse range of compositions for terrestrial worlds from super-Mercuries to super-Ganymedes. Uncertainty in density is as low as 3% in the Trappist-1 system. To determine composition from observed parameters, the community uses a variety of interior structure models. Underlying these models are multiple computational techniques, numerous experimental …

Covid-19 Isolation Compliance Among Students And Employees Of A Large Public University, Nicolette Harmon

UNLV Theses, Dissertations, Professional Papers, and Capstones

Isolation has been used to prevent the spread of many infectious diseases including COVID-19. The CDC’s isolation recommendations have changed over the course of the COVID-19 pandemic, currently infected individuals must stay at home for 5 full days. The CDC cites low compliance rates as one of the reasons for the recent reduction to the number of days in isolation. However, the CDC could only cite studies from other countries due to the lack of studies on isolation compliance in the United States. This study aimed to determine what percentage of UNLV students and staff complied with the isolation guidelines …

Salesperson-Customer Dyads In The Casino Gaming Industry: How Sales Competencies And Relationship Lifecycles Influence Customer Satisfaction And Account Profitability, Alicia Lechtenberger

UNLV Theses, Dissertations, Professional Papers, and Capstones

Developing extraordinary relationships between sales personnel and customers is essential to corporate success. To meet the increasing demands of customers within the hospitality industry, corporations must ensure they pair customers with salespeople who are highly competent, possessing refined and adaptable skill sets that directly increase customer satisfaction and account profitability. Corporations spend billions of dollars annually on hiring and training salespeople; yet, salespeople often quit or miss their quota targets. Considering this industry-wide business problem, the purpose of this dissertation study was to determine how sales competencies influence customer satisfaction and account profitability while taking into consideration the duration of …

Assessment Of Oral Human Papillomavirus In Pediatric And Adult Patients Within A Multi-Ethnic Clinic Population, Melissa Kornhaber

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Human papillomavirus (HPV) encompasses a large family of oncogenic viruses responsible for increasing rates of both cervical and oral cancer, particularly among minority and low-income populations. Although this represents an increasingly significant public health risk, few studies have screened for oral HPV within Nevada. Based upon this information, the primary objective of this study was to provide a temporal analysis of oral HPV screening among a primarily low-income, minority patient population.

Methods: This retrospective analysis was reviewed and approved by the Institutional Review Board (IRB). In brief, unstimulated saliva samples were previously obtained from clinical patient volunteers that provided …

Investigating Ancient Maya Late Postclassic Period Households And The Associated Function Of The Buildings At Santa Rita Corozal, Belize, Melissa Badillo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Previous archaeological research conducted by the Corozal Postclassic Project (1979-1985) focused primarily on the Postclassic Period at the site of Santa Rita Corozal in northern Belize. Through that research, Santa Rita was demonstrated as an important Postclassic Maya city which likely served as the capital of the ancient Maya province of Chetumal. Given the major reorganization that occurred in the Maya Lowlands at the end of the Classic Period, the assessment of a Postclassic site would demonstrate what, if any changes in the organization of Postclassic Period sites, took place. An extensive analysis of the associated artifact assemblages of six …

The Influence Of Resistance Training On Post Surgical Outcomes In Individuals With Anterior Cruciate Ligament Injury, Kevin H. Choe

UNLV Theses, Dissertations, Professional Papers, and Capstones

The anterior cruciate ligament (ACL) is commonly injured, especially in individuals under the age of 25. ACL reconstruction (ACLR) is the most common treatment after ACL injury, followed by physical therapy. However, successful surgery and completion of rehabilitation, individuals still demonstrate quadriceps weakness and asymmetries during locomotion. To improve these deficits, an intervention that improves quadriceps strength and lower extremity biomechanics during locomotion is required. First, we aimed to complete a systematic review of the literature to determine the efficacy of resistance training in improving outcomes after ACLR. Second, we aimed to identify if a history of resistance training positively …

Scardovia Wiggsiae And Streptococcus Sobrinus Prevalence Among Orthodontic And Non-Orthodontic Patients, Melissa Trumbo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: Dental cavities or caries have been identified as among the most prevalent of preventable oral conditions. However, studies are discovering new information regarding the incidence and prevalence of several cariogenic organisms, including Streptococcus mutans (SM), the recently discovered Scardovia wiggsiae (SW), as well as Streptococcus sobrinus (SS). These studies have revealed varying prevalence among different populations, such as those undergoing orthodontic treatment. Based upon this information, the main goal of the current study was to assess the prevalence of specific cariogenic organisms (SS and SW) within saliva samples originally obtained from a dental school-based clinic.

Methods: The protocol for …

Long-Term Monitoring Of Rare Gypsum Communities In The Eastern Mojave Desert: A Study In Science And Art, Tiffany Jane-Marie Pereira

UNLV Theses, Dissertations, Professional Papers, and Capstones

For land managers, reliable estimates of soil seed banks, and more specifically, change in seed banks over time, provide insight into the restoration and regeneration potential of the landscape, site history and disturbance mapping, and, invasive and rare plant management. To understand the intricacies of desert soil seed banks in relation to aboveground vegetation change, my research evaluated long-term change in soil seed banks, fertile islands, and plant communities of conservation-priority gypsum rare plant habitat of the eastern Mojave Desert. Research found significant spatial and temporal differences in seed bank composition and density over an 11-year period; however, the gypsum …

Merging Educational Technology Into Routine Care For Patients Living With Fibromyalgia, Toni Sparks

UNLV Theses, Dissertations, Professional Papers, and Capstones

Fibromyalgia is a complex and challenging disorder of unknown etiology; however the management of patients with fibromyalgia is becoming facilitated more often by Advance Practice Registered Nurses (APRN). Unfortunately, the lack of clarity in diagnosis, variances in practice guidelines, time constraints and the resources required for APRNs to adequately manage fibromyalgia can be extensive. The evidence supporting nonpharmacological strategies is strong; yet implementation of these strategies into routine care has not been sufficient.

Substantial research in the past five years has resulted in new diagnostic criteria intended to simplify the fibromyalgia diagnosis. Moreover, new clinical practice guidelines stress the importance …

Understanding Adolescent Perceptions Of Science Education, Ellen Kress Ebert

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study used the Relevance of Science Education (ROSE) survey (Sjoberg & Schreiner, 2004) to examine topics of interest and perspectives of secondary science students in a large school district in the southwestern U.S. A situated learning perspective was used to frame the project. The research questions of this study focused on (a) perceptions students have about themselves and their science classroom and how these beliefs may influence their participation in the community of practice of science; (b) consideration of how a future science classroom where the curriculum is framed by the Next Generation Science Standards might foster students' beliefs …

Variables Associated With Critical Illness Among Clark County Residence Hospitalized With H1n1 Influenza A Virus During The 2009 Influenza Season., Jonathan P. Hyatt

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background:In 2009, a novel H1N1 Influenza A virus was detected in the population. Because it can potentially affect a different population than the influenza strains circulating for the past 35 years, it is critical for physicians, practitioners and public health organizations to understand who is susceptible to this disease, and which sub-populations are most likely to suffer critical illness. The objective of this study was to examine the factors unique to 2009 H1N1 infection, with the goal of finding the variables associated with ICU admission (Critical Illness) in the Clark County 2009 H1N1 patient.

Methods:Factors that were assessed in this …

Molecular Evolution And Historical Biogeography Of New World Birds, Brian T. Smith

UNLV Theses, Dissertations, Professional Papers, and Capstones

Deciphering the patterns of how biodiversity has evolved across time and space has remained a fundamental objective for biologists for the last 200 years. Researchers are faced with the challenge of interpreting the complexity of evolutionary patterns that have been generated over the deep history of the Earth. The advancement of DNA sequencing technology has yielded a new and powerful genetic toolkit that has allowed biologists to address novel evolutionary questions. For my dissertation research, I used molecular genetics and a statistical framework to study the evolution and historical biogeography of birds distributed in North and South America. My dissertation …

Evaluating Point-Of-Sale Buying Decisions: Understanding Why Consumers Purchase Timeshares, Lisa Y. Thomas

UNLV Theses, Dissertations, Professional Papers, and Capstones

The timeshare industry, also known as vacation ownership, is the fastest growing segment of the hospitality industry with sales totaling $9.7 billion in 2008 (ARDA, 2010). The typical timeshare sales process is a 90-120 minute sales presentation conducted by a timeshare sales representative to customers. At the end of the sales presentation, the customers are given the option to either purchase a timeshare unit at a discounted price with first-day incentives or to purchase at a later date at the full price and without the extra incentives. This today-only sales pitch is perceived as an unsavory process by a many …

From The Valleys To The Mountains: The Biographic History Of Antelope Squirrels, Bats, And Chipmunks In Western North America, Stacy James Mantooth

UNLV Theses, Dissertations, Professional Papers, and Capstones

Genetic differentiation within and between species often coincides with significant geological or climatic changes that have shaped the sizes and locations of their geographic ranges and altered the connectivity between populations over time. Across western North America, many endemic taxa experienced high levels of initial divergence associated with geological transformations of the Neogene, with subsequent diversification and geographic structuring of populations associated with climatic changes during the Quaternary. As such, we can use a combination of molecular markers and genetic analyses to effectively examine the evolutionary and biogeographic histories of populations, species, and regional biotas whose signatures of differentiation are …

Examining The Impact Of Drug Court Participation For Moderate And High Risk Offenders, Kara Kobus

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to examine the impact of drug court participation among moderate and high risk offenders. While studies have found that intensive programs, such as drug courts, are more effective when focusing their services on high risk offenders, few studies have examined the relationship between offender risk and drug court effectiveness. Using the Level of Service Inventory-Revised (LSI-R) as a measure of offender risk, the study employed a quasi-experimental design to compare outcomes of drug court participants (n=228) and a matched sample of probationers (n=252). The analyses showed that drug court participants had lower rates of …

The Underrepresentation Of Women In Interscholastic Sport Leadership: A Qualitative Study On The Effects Of Role Incongruity, Dana Massengale

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to investigate the underrepresentation of women in interscholastic sport leadership positions by analyzing perceptions of state association administrators and athletic directors of the function, if any, that role congruity theory plays in the underrepresentation women. Previous research has examined potential causes for this underrepresentation but no previous study had examined this phenomenon from a prejudice toward women in a leadership role perspective. Data were collected through indepth, semi-structured interviews involving nine women leaders in interscholastic athletics. The criteria for participation placed them into one of three categories: (1) participants who were currently working as …

Determining Organization Excellence, Elliott Moseley

UNLV Theses, Dissertations, Professional Papers, and Capstones

The hotel and hospitality industry are flourishing at a greater and more rapid pace in the global context than ever before and with each new projected location there is a certain inevitable risk faced by investors in that property. The level of risk varies from one situation to the next and such potential owners/investors must be able to act and plan with confidence when investing in hotel real estate. This confidence can be accomplished with full understanding of the strengths and weaknesses of economic and market analyses within any particular location. One important tool that these individuals use is market …

An Analysis Of The Socio-Economic Impact Of Casino Gambling In Mesquite, Nevada, And Its Implications For Public Policy, Janice K. Herfeld

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study is a preliminary analysis of the socio-economic impact of casino gaming in Mesquite, Nevada. Mesquite is being studied from this perspective in order to provide policymakers with information that will aid in the determination of public policy relevant to and in conjunction with casino gaming activity. A combination of site visits to the area and interviews with casino executive personnel and relevant law enforcement was conducted for the purposes of gathering information for this study. Three police departments (Mesquite, Nevada, Cedar City, Utah and St. George, Utah) were interviewed to determine the crime rate in jurisdiction. Relevant data …

An Analysis Of The Socio-Economic Impact Of Casino Gaming In Mesquite, Nevada, And Its Implications For Public Policy, Janice K. Hetfeld

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study is a preliminary analysis of the socio-economic impact of casino gaming in Mesquite, Nevada. Mesquite is being studied from this perspective in order to provide policymakers with information that will aid in the determination of public policy relevant to and in conjunction with casino gaming activity. A combination of site visits to the area and interviews with casino executive personnel and relevant law enforcement was conducted for the purposes of gathering information for this study. Three police departments (Mesquite, Nevada, Cedar City, Utah and St. George, Utah) were interviewed to determine the crime rate in jurisdiction. Relevant data …

Factors Affecting Participation In Senior Center Programs, Betty J. Jefferson

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study investigated whether the factors of relationships, recreation, relatedness, and reward would affect participation in senior centers. Demographic variables of age, sex, and socio-economic status and enabling variables of health, transportation, and income were also investigated. Data were collected from a sample of 57 older adults (aged 55 and over) from three Las Vegas Senior Centers using an instrument developed by the investigator. Findings revealed that relationships, recreation, and relatedness contributed to reasons for participation. Rewards did not seem to affect participation. In terms of demographics, more participants tended to be older, female, and educated. Enabling variables revealed participants …