Digital Commons Network^™

Analysis Of High-Speed Rail Operations Using Vissim Simulation To Determine Access Charges And The Impact Of Incidents On A Shared Network, Komal Sree Teja Boyapati

UNLV Theses, Dissertations, Professional Papers, and Capstones

Shared High-Speed Rail (HSR) networks are networks where two or more railway operators use the same railway network infrastructure for train operations. The train operations in the shared HSR network can be composed of different types of trains operating at different speeds with varying stops at stations in a network. The interactions between different types of trains in the shared HSR network depends on the characteristics of the network’s infrastructure and train operations, and affect the capacity of the network. When a rail operator who owns the infrastructure allows other operators to access its infrastructure, the additional traffic will lead …

Validation Of Novel Obstructive Sleep Apnea Treatment With Silicone Gel Experimental Models, Dustin Walter Burd

UNLV Theses, Dissertations, Professional Papers, and Capstones

Predictive modeling to increase treatment success rates for surgical procedures is becoming more common in the scientific community. For obstructive sleep apnea (OSA), modeling has been predominately performed using computers as opposed to experimental models. Computer simulation saves time by eliminating the need to fabricate complex experimental models but comes at the expense of insight gained through physical observations made in real time. Experimental models for studying OSA are needed to validate computational work, provide perspective on anatomical scale and demonstrate complex deformations in real time. This work addresses prior hurdles in experimental model fabrication with a novel process using …

Exploring Mystery Shopping's Perceived Impacts On Integrated Resort Employees And Managers, Yoonju Chung

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study explores to identify integrated resort managers’ and employees’ perceptions about the use of the mystery shopping program as a service consistency tool and as part of the performance appraisal process. This study reviews previous literature review about the mystery shopping program and its potential psychological impacts on the employees. Such potential impacts include feelings of anxiety, induced stress, trust issues with managers, and privacy infringement. Using the thematic analysis, and Likert scale, the perceived usefulness of mystery shopping and potential psychological impacts were identified.

The study was conducted in two phases to identify both overlap and differences between …

The Economy Of (Dis)Honor In The Americas: A Transnational Rupturing Of American Literature Through Faulkner, García Márquez, And Silko, Clayton Neil Cobb

UNLV Theses, Dissertations, Professional Papers, and Capstones

Honor is misunderstood within popular culture, but it is also misunderstood within academic contexts. This is due to a decoupling of the term from its long historical significance, a significance that must not be ignored. That is because honor in the Americas is a structure of the hemisphere’s colonial legacy, its manifestation in the cultural fabric a result of the invasion of the continents by European settlers and colonizers. In the case of history, philosophy, and social science, the study of honor is beginning to undergo appropriate theorization to recognize that legacy; however, within literary studies disciplines, critical understanding of …

Managing The Performing Arts Center: Best Practices For University-Based Performing Arts Centers, Lori Cobo

UNLV Theses, Dissertations, Professional Papers, and Capstones

University-based performing arts centers are an asset not only for the institutions where they exist, but also the community that it serves. This thesis takes a brief look at the following topics; reporting structure, billing practices, presenting, and student tickets/fees. The University of Nevada, Las Vegas (UNLV) Performing Arts Center has been a part of the university since 1976 and the focal point of this paper. Nineteen other similar institutions were surveyed with results from eleven others used as comparison. University-based performing arts centers can and should be seen as a strong financial partner for the institution.

The Effect Of Body Armor On Pulmonary Function And Repeated Sprint Performance, Dustin Dunnick

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: Tactical athletes face the unique task of performing physically demanding occupational duties often while wearing torso-borne loads. While pulmonary function has been shown to decrease while wearing plate-carrier style body armor, there has yet to be a study using the more accurate measurement of plethysmography to determine exactly why. Additionally, the inspiratory muscle’s pressure generation capabilities and how they respond to a repeated running sprint test while wearing body armor are unknown. Therefore, the purpose of this dissertation was to examine how body armor affects pulmonary function, inspiratory muscle strength, and athletic performance during repeated, high-intensity sprints.

Methods: Twelve …

Light Conditions During Desiccation And Rehydration Impact The Recovery Of Cultured Timmiella Crassinervis, Sotodeh Ebrahimi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Many terrestrial mosses of xeric environments experience excess light during extended periods of desiccation. While dry or hydrated, excess light energy can lead to formation of reactive oxygen species and photoinhibition (e.g. damage to Photosystem II) which affects photosynthetic stress and efficiency. This study aimed to determine the effect of duration dry and light intensity (PAR) on cultured shoots of the chaparral moss Timmiella crassinervis, as well as to elucidate the optimal rehydration light conditions for this species. I hypothesized that 1) mosses exposed to higher light intensities during desiccation would incur more damage upon rehydration than those exposed to …

Prosocial Rule-Breaking To Help Customers Among Hospitality Employees, Ankita Ghosh

UNLV Theses, Dissertations, Professional Papers, and Capstones

This research investigates the causes and effects of prosocial rule-breaking behavior among hospitality employees to serve a customer. This research takes a two-study approach based on the depletion theory (Baumeister, 2002). Study 1 examines the effect of unique aspects of the hospitality industry i.e., customer mistreatment and work-overload on PSRB-S through the mediating role of employee depletion. To avoid common method biases, a two-wave time-lagged online survey research design was implemented to collect data for Study 1. Customer mistreatment and work overload were measured in Time 1 and employee depletion and PSRB-S were measured in Time 2. Study 2 examined …

Rusalka And The Snow Maiden: A Comparative Study Of Two Fairytale Operas, Olivera Gjorgoska

UNLV Theses, Dissertations, Professional Papers, and Capstones

The two late-romantic operas Rusalka by Antonín Dvořák and The Snow Maiden by Nikolai Rimsky-Korsakov are based on fairy tales, and combine romance, fantasy, and drama. Their plots develop in parallel universes and have astonishing similarities. However, the music and drama develop following different goals. In Rusalka, leitmotifs and dramatic harmonies shape the plot into a tragedy. In The Snow Maiden motives and melodies exist to describe the character rather than lead the story and the drama; the focus is on Russian folk elements, choruses, and people.

The main character in both operas is a naïve, beautiful, fairy-like female character …

Tectonic Evolution Of The Tucki Mountain Metamorphic Core Complex, Southeastern California: Evidence For Late Cretaceous Extension Within The Sevier-Laramide Orogen, William Killey Barba

UNLV Theses, Dissertations, Professional Papers, and Capstones

The exhumation of Cordilleran metamorphic core complexes from mid-crustal depths in the western U.S. Basin and Range Province has been classically associated with Cenozoic extension. However, recent studies reveal that extensional tectonic exhumation of numerous metamorphic core complexes initiated during the Late Cretaceous. New geologic mapping and structural analysis integrated with geochronology and thermochronology data provide evidence for a Late Cretaceous extensional shear zone, previously interpreted as Miocene in age, within the Tucki Mountain metamorphic core complex on the western flank of Death Valley, California. The shear zone occurs within the immediate footwall of the Miocene-Pliocene Tucki Mountain detachment fault …

A Divide And Conquer With Semi-Global Failover For Software Defined Networks, Kasra Goravanchi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nowadays, many service providers need to provide many other functions than just a network connectivity. They also need to provide network functions such as network address translation, firewall, encryption, Domain Name Service (DNS), caching, routing and many other services. Usually these functions come with the hardware at the user or customer’s premises. This can increase the revenue of the revenue, but also can cost a lot and also be extremely difficult to maintain. Moreover, it is important to be able to configure the network and later modify the configuration to create fault tolerance and to prepare the system for future …

Validity And Diagnostic Accuracy Of An Adhd Symptom Rating Scale For Identifying Adults With Adhd, Stacy Jean Graves

UNLV Theses, Dissertations, Professional Papers, and Capstones

Specific rating scales of ADHD symptomatology are often included in neuropsychological assessments evaluating adults diagnosed with Attention Deficit Hyperactivity Disorder (ADHD). The Barkley Adult ADHD Rating Scale-IV (BAARS-IV) is a widely used symptom rating scale that includes four questionnaires: self-report current, self-report childhood, other-report current, and other-report childhood. In addition to ADHD symptoms, each of the forms include items that assess functional impact and developmental history of symptomatology. While similar symptom rating scales have been found to have high validity and diagnostic utility in children, it is unclear the extent to which the BAARS-IV shares substantial common variance with other …

Gardasil Vaccine Trends Within Nevada, California, And The U.S.: A Comparative Study, Karen S. Gutierrez

UNLV Theses, Dissertations, Professional Papers, and Capstones

Despite decreasing incidence in cervical cancer in the U.S., there continues to be an increase in public health concern for cervical cancer worldwide. Recent studies report that individuals are disproportionately affected based on region, sex, and race. Additionally, the human papillomavirus (HPV) attributable cancers may be reduced between 70% and 90% through the universal use of HPV-vaccines. In order to expand current knowledge and implement intervention programs in Nevada, it is critical to examine the associations among the Gardasil vaccine, cervical cancer screening, and adverse events following immunization as well as to understand the different socio-demographic subgroups affected. To our …

Using The Critical Mathematics Pedagogical Framework To Teach Adult Basic Education Learners: A Transformative Convergent Parallel Mixed Methods Study, Matthew D. Gromlich

UNLV Theses, Dissertations, Professional Papers, and Capstones

The goal of this study was to design and implement curricula in the Adult Basic Education classroom that aligned to the Critical Mathematics Pedagogical Framework. Specifically, this study assessed if ABE students’ mathematics anxiety and mathematics self-efficacy ware affected by curricula that aligns to the Critical Mathematics Pedagogical Framework. Using a transformative convergent parallel mixed methods study, this study showed that students taught using CMPF-based lessons specifically reflected on their own attitudes towards mathematics self-efficacy, mathematics anxiety, number positioning, and the need for societal change around mathematical concepts. Both quantitative and qualitative data were analyzed to highlight student reflections and …

Addressing Disproportionality In School Discipline Through Alternatives To Exclusionary Discipline Practices, Kevin Matthew Higley

UNLV Theses, Dissertations, Professional Papers, and Capstones

Tasked with ensuring that school environments are safe and orderly, school administrators spend an increasingly inordinate amount of time and energy on managing student discipline. Often, when students commit egregious behaviors or violate school policy, schools resort to out-of-school disciplinary consequences, i.e. suspension, expulsion, or alternative educational placements, in attempts to reduce problem behaviors from recurring. Historically though, these exclusionary discipline practices have led to the unfair treatment of some students, (e.g., Black/African American students, male students, and/or students with disabilities). This disproportionate practice is often cited as the genesis for the school-to prison pipeline phenomenon. From a behaviorist perspective, …

Association Between White Matter Hyperintensities, Cortical Thinning, And Clinical Outcomes In Mild Traumatic Brain Injury, Thomas Helmut Knoblauch

UNLV Theses, Dissertations, Professional Papers, and Capstones

Traumatic Brain Injury (TBI) is a global health challenge, with over 4.6 million confirmed cases annually in North America alone. Mild traumatic brain injuries (mTBIs) are the most common and make up approximately 81% of all TBI diagnoses worldwide [1]. Studies indicate that 10–15% of patients suffer from trauma induced symptoms (i.e. headache, loss of balance, cognitive impairments, fatigue, and mental health/affective disorders) as far as 1 year post injury [2]. Prediction and management of these post-traumatic sequalae is complicated by a lack of symptom associated neuroimaging findings. In spite of a “prominent distribution” of frontotemporal WMHs in pediatric subjects …

Exploring The Airline Passengers’ Preferences Of Inflight Foods, Eun Min Hwang

UNLV Theses, Dissertations, Professional Papers, and Capstones

To keep up with a rapidly expanding aviation industry, it is critical for airline marketers to incorporate most preferred service elements to enhance the passengers’ inflight experience. To attract the valued passengers, the current study focused on inflight foods and included the attributes that address the trends of healthy and environmentally sustainable foods. Usingconjoint value analysis, the study investigated the differences on participants’ preferences and importance of inflight food attributes with their demographic profiles and travel characteristics. The research found that health and taste attributes were found to be the greatest importance of inflight foods and suggested the optimal inflight …

Fast Neutron Assay Of Elemental Content Of Bulk Samples, Calder Emerson Lane

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this research was to analyze the capabilities of fast neutrons in the detection and analysis of various isotopes in bulk samples. The deuterium-tritium (DT) fusion reaction generates highly penetrating, high-energy (14.1-MeV) neutrons which induce nuclear reactions in irradiated targets. Neutrons and gamma rays are generated in these reactions. Emitted gamma rays are characteristic of the emitter; the gamma spectrum enables stoichiometric identification of the assayed samples. Neutron backscattering can also be used for identification of the elemental composition of the sample.

This work had three objectives. The first objective was to develop a computational technique to model …

A Circle Hough Transform Implementation Using High-Level Synthesis, Carlos Lemus

UNLV Theses, Dissertations, Professional Papers, and Capstones

Circle Hough Transform (CHT) has found applications in biometrics, robotics, and imageanalysis. In this work, the focus is the development of a Field Programmable Gate Array (FPGA) based accelerator that performs a series of procedures and results in circle detection. The design is performed using Vivado High-Level Synthesis (HLS) tools and targeted for a Zynq UltraScale+ ZCU106. The implementation includes the following procedures: Gaussian filter, Sobel edge operator, thresholding, and finally the CHT algorithm. The performance is evaluated based on the execution time as compared to the software (Python code) execution and the analysis tools provided by Vivado HLS tool. …

The Relationship Among Sociocultural Assimilation, Dietary Behavior, And Physical Activity In Adult Latinxs In The U.S., Erick Lopez

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation examines the relationship between sociocultural assimilation and health behaviors among adult Latinxs in the United States to address whether different assimilation models promote or hinder Latinx health. Existing research on assimilation and health behaviors among Latinxs relies heavily on the use of proxy measures of assimilation such as length of time in the U.S., nativity, age of arrival, and language preferences for surveys. These studies tend to show that greater assimilation to mainstream U.S. culture among Latinxs is associated with the adoption of poor health behaviors and the erosion of the immigrant health advantage. Research that uses sociocultural …

Alternate Novel Thermal Structure Interaction Designs Of Molten Salt Shell Structures At High Temperatures Ranging From 565˚C To 700˚C, Nathan David Tyrrell Loyd

UNLV Theses, Dissertations, Professional Papers, and Capstones

Excess energy from solar power stations and other baseline power production methods canbe stored in molten salts (MS) in the 565°C range, therefore allowing the use of large containers to store energy for up to a week and generate eight hours of electricity or more to be used during peak demand hours, at night, or adverse weather conditions, depending on the container size. Supported by Office of Naval Research (ONR), this research presents a survey of molten salt properties used in solar power storage, as well as the history of molten salt usage for energy storage and production for nuclear …

Synthesis, X-Ray Absorption, And X-Ray Diffraction Spectroscopy Studies Of Uranium Based Heavy Fermion Systems, Vahe Mkrtchyan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Heavy fermion systems have attracted a great deal of interest since the discovery of the phenomenon in the 1970s. Over the past 35 years, the research in this field revealed a variety of unprecedented properties that the conventional theoretical framework considered conflicting or impossible. The subset of intermetallic compounds containing rare earth and actinide elements is of special interest, as these materials exhibit a range of exotic properties associated with 4f or 5f electrons. A thorough examination of the reports in the literature indicates a delicate interplay between the competing ground states, giving rise to anomalous properties including non-Fermi liquid …

A Fortified Extension Of The Aes And Its Implementation, Ashby Mullin

UNLV Theses, Dissertations, Professional Papers, and Capstones

With the advancement of quantum computing (QC), the integrity of cryptography has been called into question. For example, two QC algorithms have been developed that can break asymmetric encryption (i.e., Grover’s, Shor’s), which also poses a threat to symmetric encryption. Asymmetric encryption efforts addressing this threat include lattice-based cryptography, which uses lattice problems to reduce efficiency of cryptanalysis. Symmetric encryption security can be bolstered by increasing the key length, allowing for additional permutations a key could have; known as keyspace. This thesis seeks to expand the keyspace of symmetric encryption in order to create more possibilities. This fortification to the …

Tissue-Specific Responses From A Global Developmental Signal: A Detailed Subcellular Analysis Of The 20e And Rab Signaling Pathways Controlling Exocrine Secretion During Drosophila Development, Nichalas Nelson

UNLV Theses, Dissertations, Professional Papers, and Capstones

During metamorphosis, the steroid hormone 20-hydroxecydysone (20E) triggers a plethora of tissue-specific responses in the common fruit fly, Drosophila melanogaster. The salivary glands are exocrine organs that respond to a large pulse of 20E to secrete a massive cargo of stored glycoproteins called glue. Because the glands are amenable to ex vivo-organ culture and powerful genetic manipulations, they are an excellent model for studying the conserved developmental and physiological signaling pathways that regulate the general function of these specialized secretory tissues. Our lab has generated transgenic animals in which the secreted glue molecules are tagged with fluorescent proteins. I have …

A Nevanlinna-Type Counting Function And Pullback Measure, John Nguyen

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this dissertation, we introduce a Nevanlinna-type counting function, $M_{\varphi, \alpha}$. We show that $M_{\varphi, \alpha}$ is subharmonic and continuous on $\theset$ by exhibiting certain properties of the logarithmic potential of the associated pullback measure of two-dimensional Lebesgue measure on $\mathbb{D}$. Different identities of $M_{\varphi, \alpha}$ are presented. A change-of-variable formula calculates precisely the weighted Bergman norms of composition functions in terms of $M_{\varphi, \alpha}$. Certain estimates involving $M_{\varphi, \alpha}$ and the associated pullback measure on Carleson windows and semi-disks are demonstrated. For weighted Bergman space $A^2_\alpha$, we characterize orthogonal self-maps and give the Hilbert Schmidt norm of $C_\varphi$.

Minimizing Visual Defects Through Augmentation Of Computer Aided Diamond Rough Planning, Abhijith Prabhu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Many computer aided design systems today utilize a workflow where physically accurate rendering of the product is not a functional component of its design process. This gap in workflow can lead to a sub optimal product or even a longer iterative design process in instances where a product's visual attributes and aesthetics are one their primary functional characteristic.

Diamonds are graded on their carat, color, clarity and cut, referred to as the 4Cs of a diamond; a standard set by G.I.A. and universally agreed upon. The cut of a diamond significantly affects the rest of the characteristics as it modifies …

A Multi-Channel Mcp-Pmt Based Readout Integrated Circuit For Lidar Applications, Sachin Purushothaman Namboodiri

UNLV Theses, Dissertations, Professional Papers, and Capstones

Photon counting techniques are becoming more critical in fields such as LiDAR, high energy physics (HEP), and positron emission tomography (PET). For space-based aerosol-cloud-ocean (ACO) LiDAR, the total aggregate photon flux signal has a very high dynamic range, from a single-photon up to giga-photons per second for a single channel. This dissertation focuses on the design of a multichannel, photon counting readout circuit that can interface with MCP-PMTs for high dynamic range, space-based LiDAR applications. Chapter 2 presents the conventional current mode approach that has been employed to realize a photon counting circuit. A transimpedance amplifier, a 6-bit delay line …

Madres, Hijas, Y La Frontera: An Analysis Of The Relationship Between Mexican Mothers And Mexican-American Daughters, Arianna Gabriela Razo

UNLV Theses, Dissertations, Professional Papers, and Capstones

The goal of this thesis is to investigate the role Mexican mothers play in raising their children and how the border affects their abilities as mothers, looking specifically into the Mother-Daughter relationship, broken down even further into the Mexican mother versus the Mexican-American daughter. To explore this concept, I examine Sandra Cisneros, Caramelo, looking at all the mothers, but specifically into the Reyes matriarchs, and Aaron Bobrow-Strain, The Life and Death of Aida Hernandez, to show how the border has influenced Mexican mothering styles, along with juxtaposing how Mexican immigrants were treated in the 20th century to how politicization of …

How Does Stress And Coping Impact Undergraduate Students' Mental Health On A Racially Diverse Campus?, Kristina Ricker-Boles

UNLV Theses, Dissertations, Professional Papers, and Capstones

The study focuses on how subjective stress and mastery skills impact physical and mental wellbeing among UNLV undergraduate college students. Bovier, Chamot, and Perneger’s (2004) study was repeated within a racially diverse campus setting. The Transactional Model of Stress and Coping provided the foundation of this study with an emphasis on primary and secondary appraisal among racial and ethnic groups. The study utilized the Pearlin Coping Questionnaire, the Short Form-12 (SF-12), the Brief Encounter Psychosocial Instrument (BEPSI), and Duke-UNC Functional Social Support Questionnaire to assess subjective stress, mastery skills, and the moderator of social support while comparing the results among …

A Nomological Network Analysis Of Innovation In Hospitality Education And Industry, Robert H. Rippee

UNLV Theses, Dissertations, Professional Papers, and Capstones

The development of a theory of innovation for hospitality innovation finds heightened importance due to the COVID-19 Pandemic that has unleashed a devastating and sustained disruption on global hospitality and tourism. The problem for research is that the industry lacks a taxonomy for research on innovation in hospitality. This study addresses the gap in understanding the nomological relationship between innovation constructs and the observable manifestations of innovation in the hospitality industry. This study used an emergent basic qualitative design of a phenomenon through data collected in three phases. Two large samples of literature and a series of focus groups comprised …