Digital Commons Network^™

Meal Duration: Implications For Restaurant Revenue Management, Dale F. Billings

UNLV Theses, Dissertations, Professional Papers, and Capstones

A comprehensive revenue management strategy addressing space, product, price and time, has been shown to increase profits within the hospitality sector. While the literature shows that the restaurant industry has frequently addressed space, product, and price when looking at financial strategy, the effect of the variable of time on revenue generation has not been adequately studied. Restaurants shy away from the practice of using time as a commodity, particularly regarding meal duration, due to fears of reducing customer satisfaction.

This project explores the use of time as a commodity in restaurant revenue management. In particular, it examines consumers’ feelings about …

Reconciling Incongruencies: Examining The Meaning And Influencing Factors Of Oncology Nurses' Professional Quality Of Life, Rebecca Lynne Boni

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nurses often witness suffering and loss. These experiences are intrinsic to the practice of nursing and can exert a strong, cumulative effect on nurses’ professional quality of life (QOL). Stamm (2010b) conceptualizes professional QOL as a composite of compassion fatigue and compassion satisfaction. Inferior professional QOL has been linked to numerous negative healthcare outcomes. Oncology nurses are particularly vulnerable to compassion fatigue. The Professional Quality of Life Scale (ProQOL), created by Stamm (2009), is the current survey used to measure professional QOL, but it may not be specific enough for oncology nurses.

The purpose of this grounded theory study was …

Zirconium Tetrachloride, Fundamental Chemistry And Nuclear Fuel Cycle, Rosendo Borjas Nevarez

UNLV Theses, Dissertations, Professional Papers, and Capstones

Zirconium alloys are used in the United States as cladding materials in nuclear reactors. The purification of Zr is of relevance due to the large amount of spent nuclear fuel produced every year (2,000 metric tons per year and rising), of which 25% corresponds to radioactive zirconium cladding. Through the recovery and reuse of Zr, estimated savings of $40 million per year are estimated due to the high cost of hafnium-free nuclear grade zirconium, and also due to the minimization of nuclear waste disposal requirements.

Several chemical approaches have been proposed for the recovery and purification of Zr. Historically, a …

A Retrospective Survey Of Exercise Habits In Low-Income Female Senior Citizens, Kelly L. Bumgarner

UNLV Theses, Dissertations, Professional Papers, and Capstones

American adults spend at least 50% of their time sedentary with the most inactive demographic being low-income women over 60. This is detrimental because routine physical activity benefits for senior women include balancing hormones, maintaining bone mineral density, and decreasing the risk of breast cancer. Statements like “good exercise habits begin during youth; children should play sports to establish healthy habits they’ll continue throughout their lives” are common, but not clearly supported by literature. Objective: The purpose of this retrospective, cross-sectional study was to identify whether physical activity/exercise habits during youth and young adulthood predict old age physical activity/exercise habits …

Arbitrary High Order Finite Difference Methods With Applications To Wave Propagation Modeled By Maxwell's Equations, Min Chen

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation investigates two different mathematical models based on the time-domain Maxwell's equations: the Drude model for metamaterials and an equivalent Berenger's perfectly matched layer (PML) model. We develop both an explicit high order finite difference scheme and a compact implicit scheme to solve both models. We develop a systematic technique to prove stability and error estimate for both schemes. Extensive numerical results supporting our analysis are presented. To our best knowledge, our convergence theory and stability results are novel and provide the first error estimate for the high-order finite difference methods for Maxwell's equations.

Blanche Dubois: A Woman's Journey From Belle Reve Through Tarantula Arms To The Elysian Fields, Raluca Daniela Comanelea

UNLV Theses, Dissertations, Professional Papers, and Capstones

This present thesis aims at deconstructing the main character of A Streetcar Named Desire by Tennessee Williams: Blanche DuBois. Blanche’s journey is traced from Death to Desire and finally, to an ultimate envisioned destination, The Elysian Fields, which represents her physical and spiritual burial at sea, with her soul ultimately reaching heaven. Blanche’s most important quality - her ability to seduce audiences into perceiving the multifaceted layers of her feminine character all at once - marks her entry into Williams’s theatre of excess. Her theatricality springs precisely from her fascinating ability to reconstruct her persona in the course of the …

Uncovering The Women In Ocean’S Eight: Understanding The Trends Of The Women’S Movement With The Portrayals Of Women In Film, Elyssa Michelle Day

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study seeks for a better understanding of the correlations between major milestones in the women’s movement and how that is reflected onto the silver screen. With the rise of sexual assault allegations against prominent figures in Hollywood, and the growth of the #MeToo movement, we in turn are beginning to see an influx of films being released, and older films being rebooted, with an all-female led cast. One of those all-female film reboots is Ocean’s Eight, a film coming from a male-dominated trilogy and genre. Because of this correlation, the question of whether the narratives within Ocean’s Eight reinforce …

Treatment Of Perchlorate And Multiple Oxyanions: Chemical And Biological Investigations, Mark Elkouz

UNLV Theses, Dissertations, Professional Papers, and Capstones

Groundwater contamination with oxyanions is an issue that must be addressed for environmental, ecological and societal reasons. Chemical and biological treatment methods of reduction are already known and practiced, but the simultaneous presence of multiple oxyanions can add complicating effects to treatment sequence and efficacy. This research was concerned with the investigation of the chemical reductive treatment of Cr(VI) using both calcium polysulfide (CaSx) and ferrous sulfate (FeSO4), and the biological reductive treatment of chlorate, Cr(VI), nitrate and perchlorate using multiple organic substrates. The chemical treatment phase consisted of initial jar tests, using CaSx and FeSO4, followed by a laboratory …

Ethnic Power Dominance In A Resource-Rich Sub Saharan African State: An Analysis Of Violent Conflict Accelerators And The Mitigating Influence Of Civil Society In Nigeria, Victor O. Fakoya

UNLV Theses, Dissertations, Professional Papers, and Capstones

My dissertation research explores the impacts of ethno-regional power dominance, trust, and violent conflict in a resources-rich multiethnic, sub-Saharan African state. This dissertation examines the impact that ethnic power dominance has on the relationship between conflict and civil society in a resource rich sub-Saharan African (SSA) nation examined. Relying upon intra-state case study analysis of the socio-political climate in Nigeria, I argue that distrust in the national government, when motivated by ethno-regional cleavages has an accelerating influence on the incidence of conflict. Using cross-national survey data in conjunction with field interview data, this research finds that in the regions where …

The Retrospective Analysis Of Radionuclides In Banded Coral From The Bikini Atoll, Athena Marie Gallardo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nuclear weapons testing conducted within the Bikini Atoll in the Marshall Islands resulted in local fallout contamination, including long lived isotopes of plutonium (Pu) and uranium (U), within the surrounding environment. The Bikini lagoon provides a continuous source of Pu (239+240Pu) and U (236U) to the Pacific Basin. The rate at which these isotopes are flushed from the lagoon to the ocean is balanced by inputs from remobilization of lagoon sediments. This research will provide a basis for predicting future change in the solubility and export potential of Pu and U in lagoon sediments. This is important to better understand …

Empirical Justification For Supportive Other Involvement In Collegiate Athletes’ Mental Health Intervention, Elena Gavrilova

UNLV Theses, Dissertations, Professional Papers, and Capstones

Student-athletes have been identified to evidence similar or higher rates of mental health difficulties and lower levels of mental health engagement as compared with non-athlete peers. Along these lines, sport-specific mental health intervention has been justified by researchers, yet only one randomized clinical trial has been conducted in collegiate student-athletes who have been formally assessed for mental health disorders (i.e., a family behavior therapy as compared with traditional campus counseling as usual; Donohue et al., 2018a). Results of this outcome study demonstrated greater improvements for participants who received the family-based intervention up to 8-months post-randomization. In this clinical trial, the …

Community Exposure To Particulate Matter And Its Impact For Students And Residents Near A Construction Asphalt Plant: A Case Study, Aman Gebremariam Gebreselassie

UNLV Theses, Dissertations, Professional Papers, and Capstones

Particulate matter (PM) consists of various small particles in the atmosphere that has been associated with environmental health risk factors for many deadly diseases. PM2.5 is particulate matter 2.5 micrometers or less in diameter, PM10 is particulate matter 10 micrometers or less in diameter and are both respirable particles that can penetrate the lungs and increase risk of cardiovascular problems and respiratory illness, among other health issues. Exposure to particulate pollution in the environment tends to cause lost income from work absence, students’ absences from school, hospital admissions as well as emergency and doctor room visits.

Although asphalt plants are …

Examining The Effectiveness Of A 4d Schedule And A Virtual Reality Model On A Modular Project: Unlv Solar Decathlon Case, Rajarshi Ghimire

UNLV Theses, Dissertations, Professional Papers, and Capstones

The use of a 4D schedule as technological advancement has brought significant improvement to the planning and execution of construction projects, through visualizing stepwise construction progress, following a sequence of pre-planned activities, and finalizing a baseline schedule with necessary changes. Moreover, the application of virtual reality (VR) to create interactive 3D models of a planned structure has made it possible to make a detailed planning of any construction project. Because of these benefits, the use of 4D schedules and VR in the construction industry has increased drastically, leading to improved planning and execution. However, past studies have given little attention …

Disparities In Administrative Pediatric Asthma Prevalence In Clark County, Aaliyah Goodie

UNLV Theses, Dissertations, Professional Papers, and Capstones

Objective: Asthma is one of the most common chronic diseases affecting young children nationally and globally. Asthma affects more than 25 million people in the nation, of which 6

million are children. Lifetime asthma prevalence for children in Nevada is 11.5% (CDC, 2016). This is likely an underestimate due to a large undocumented Hispanic population. In Clark County School District (CCSD) during the 2016-2017 school year, 20,235 students (8%) listed asthma in school records as a health concern. Asthma burden varies by sociodemographic group with highest rates documented among Black/African American, Hispanic/Latino, and pediatric populations. The Centers for Disease Control …

Uncovering New Mechanisms Of Cdc34 And Cullin-Ring Activity, Spencer Hill

UNLV Theses, Dissertations, Professional Papers, and Capstones

Ubiquitylation is a cellular regulatory system found in all eukaryotic cells, which has managed to find a role in most pathways imaginable. The system works fundamentally through the ligation of a small protein known as ubiquitin onto a substrate. Depending on the context of the ubiquitin ligation, the substrate can be directed towards a number of cellular fates, the best-studied being degradation of the substrate. While originally thought of as a signal for cellular disposal units to degrade aberrant proteins, we now know that ubiquitin plays a highly nuanced role in cellular epistasis, controlling everything from the cell cycle to …

International Faculty’S Lived Experience Of Teaching: A Multiple-Case Study Of Taiwanese Professors In The United States, Ching Hsu Kim

UNLV Theses, Dissertations, Professional Papers, and Capstones

In the context of higher education, a tenure-track faculty is expected to be actively engaged in scholarly activities including research, teaching and service activities. Finding a balance between personal and career lives is seen critical yet challenging especially to early-career international faculty members while they are in the face of differences and changes. Framed by theories of perezhivanie and resilience, the study examined international faculty members’ lived experiences of teaching. Interviews, blog prompts and reflection prompts were used to identify their major difficulties, perceptions and adjustments, and resilience development. Findings suggest that faculty members unavoidably encountered difficulties in their beginning …

The Impact Of Virtual Presence On Willingness To Book: The Moderating Role Of Self-Construal And Gender, Sung Jun Joe

UNLV Theses, Dissertations, Professional Papers, and Capstones

Social influence is not limited only to interactive situations but also includes those that occur without a direct interaction such as the mere presence of others (Argo, Dahl, & Manchanda, 2005). Although there is wide agreement that the mere presence of others influences one’s decision-making process, little research is conducted to understand whether the effect of the presence of others influences consumer behaviors in an online context (Naylor, Lamberton, & West, 2012). To address this gap, this study suggests that mere virtual presence (MVP) provides social cues to the customer and influences the customer’s willingness to book (WTB). Specifically, the …

The Historical And Cultural Influences Of Gagok 가곡 (Korean Art Song): A Musical Guide, Sarah Kim

UNLV Theses, Dissertations, Professional Papers, and Capstones

This document explores what Gagok (Korean Art Song) consists of, the origins and history of it and how one may approach it musically, vocally and interpret it textually. The main questions I answer in this document include: What makes these art songs distinctly Korean? What significance does the role of Eastern Asian history have in order to closely tie the inspiration of writing Gagok? How does the text and music express these important historical events? The answers to these questions are essential to understanding Gagok by analyzing and interpreting the songs also in relation to approach learning them.

The research …

Mental Accounting And Unplanned Purchases In Online Booking: The Role Of Discount, Impulse Buying, And Thinking Style, Esther L. Kim

UNLV Theses, Dissertations, Professional Papers, and Capstones

To minimize the high cost of commissions of online travel agencies (OTA), the majority of hospitality operators provide member only exclusive rates to encourage consumers to book on their websites directly. However, the revenue cannot be maximized due to the amount of discount. This dissertation suggests that hospitality operators may maximize their profit with the adoption of surprise discount to increase consumers’ unplanned purchases. Applying the mental accounting principle, this dissertation examines how consumers respond to a surprise discount when they make unplanned purchases, such as purchasing add-on items online. This dissertation utilized three experiments in an online hotel booking …

Alkali-Silica Reactivity Of Mortars Containing Natural Pozzolan, Arash Kian

UNLV Theses, Dissertations, Professional Papers, and Capstones

Alkali-silica reactivity is one of the most recognized deleterious phenomena in Portland cement concrete resulting in cracks, spalling, and other deleterious mechanisms.

The aim of this study was (i) to assess the extent of reactivity of the aggregates, quarried from seven different sources, suspected of being conducive to ASR, and (ii) to compare the effectiveness of industrial (Class F fly ash) and natural pozzolans in mitigation of alkali-silica reactivity of the studied aggregates. To this end, seven aggregate sources, four natural pozzolan sources, and one source of Class F fly ash were used. ASTM Type V Portland cement was replaced …

Lifting The Veil: Do Health Care Price Transparency Laws Actually Lower Costs?, Nora Michelle Irene Langendorf

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this research is to determine whether or not health care transparency laws, in the form of price transparency, lower the rate of increase paid out in health care expenditures in those states that have enacted these laws compared to those states that have not. By controlling for factors such as poverty, age, chronic illnesses, and income that may play a part in lowering or raising health care costs, the primary explanatory variable – health care price transparency laws – can determine if there is a strong relationship with the dependent variable (the rate of increase on health …

A Binding Sisterhood Of Transnational Feminism: A Close Look At Iran And Argentina, Bernadette Mary Lazar

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation examines the impact of transnational feminism in Iran and Argentina. Specifically, it focuses on the role of the diaspora and international communities and their interactions with social movements in these two countries. Although the study of transnational feminism is not a new phenomenon, very little research has been dedicated towards distinguishing the effects and differences in outcomes when either the diaspora or the broader international network is involved. By filling this gap in the literature, this dissertation will shed light on whether the diaspora community, NGOs, or the international community is necessary for success or favorable outcomes in …

Visual Attention And Emotion Regulation In Schizophrenia, Bern Lee

UNLV Theses, Dissertations, Professional Papers, and Capstones

Emotion regulation and emotion processing deficits cut across the varying symptom presentations of schizophrenia. Emotion processing deficits are inadequately treated by pharmacologic interventions and are related to real-world functional impact and disability. This study investigated behavioral and psychophysiological responses to a series of emotion regulation tasks while concurrently collecting eye tracking data as an index of visual attention. A brief neurocognitive assessment was also completed in order to examine potential cognitive determinants of emotion. Participants completed tasks designed to assess cognitive change and directed attention strategies for down-regulation of unpleasant and pleasant emotion. For each of our two unpleasant emotion …

Discovering Motor Phenotypes In Autism Spectrum Disorder: A Cross-Syndrome Approach, Daniel Edwin Lidstone

UNLV Theses, Dissertations, Professional Papers, and Capstones

Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder with a behavioral phenotype characterized by persistent deficits in social communication and social interaction accompanied by restricted, repetitive patterns of behaviors, interests, or activities. Currently in the US, approximately 2.5% of children have a diagnosis of ASD. The etiology of ASD is complex, however the disorder does have a strong genetic basis. Specific genetic mutations can lead to neuroanatomical and neurophysiological changes during development resulting in a behavioral phenotype that falls along the ASD spectrum and may result in a diagnosis of ASD. The severity of ASD-specific behaviors falls on a continuum …

Moisture Dynamics Of A Near-Surface Desert Soil, Yuan Luo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Desert soils cover about one third of the Earth’s land surface. Despite their large extent, however, our understanding of desert soil hydraulic processes and properties is still rather limited. In particularly with respect to the near-surface (top centimeters) of the soil profile, which play a critical role for infiltration, redistribution and evapotranspiration of rainwater, the limiting resource for life in desert environments, but also hosts most of the biologic activity and controls runoff, erosion as well as the emission of dust (Nannipieri et al.,2003; Bradford et al.,1987). Additionally, deserts are ideal locations for electricity generation with solar energy using large-scale …

Improving Community College Students' Interest, Utility-Value, And Performance: How Does Future Time Persective Influence A Utility-Value Intervention?, Elsa Maria Mason

UNLV Theses, Dissertations, Professional Papers, and Capstones

The economic benefits of academic success and completion are long-lasting. Students who attend community colleges can stand to benefit a great deal by completing a 4-year degree or even a 2-year degree. Unfortunately, these students often begin their higher education journey not fully prepared for college-level coursework. Students often fail to see how their college coursework relates to their lives and in turn, don’t hold interest or perceive value for the course and consequently do not perform well. Using Eccles et al. (1983) expectancy-value theory this study tested how community college students would respond to a utility-value intervention in which …

On Algebraic Structures And Automaton For Optimal Computer Network Design And Performance Study, Xiangrong Ma

UNLV Theses, Dissertations, Professional Papers, and Capstones

For decades, study of computer networks has been concentrated on the use of the well-established OSI or TCP/IP reference models that have found tremendous success in the actual implementation of various network structures and protocols. Lack of theoretical foundation, this implementation-driven, empirical approach, however, is experiencing insurmountable difficulties in delivering, tuning for, and sustaining the promised peak performance of a computer system that is so heavily dependent on the performance of the underline computer networks. This issue is becoming particularly prevalent in today’s cloud-based high-performance computing environment where CPU-time-extensive computation loads need to get distributed among computing machines through high-speed …

Design Of Efficient Carbon-Based Adsorbents For The Removal Of Organic And Inorganic Water Contaminants, Sayedeh Soroosh Mortazavian Dehkordi

UNLV Theses, Dissertations, Professional Papers, and Capstones

Granular activated carbon (AC) and biochar (BC) are two carbon-based adsorbents commonly used for water and wastewater treatment. However, these adsorbents have drawbacks that suppress their aqueous contaminants removal efficiency. Their major disadvantages are that AC has low selectivity and reusability potential, and BC has a hydrophobic nature.

The scope of this dissertation is to enhance the performance of commonly-used carbon-based adsorbents for the removal of organic and inorganic water contaminants and to understand the interactive mechanism of contaminants’ ions/molecules with adsorbents. Hexavalent chromium (Cr(VI)) and trichloroethylene (TCE) are two types of inorganic and organic water contaminants, respectively, which are …

Development Of Natural Perlite Based Concrete For Sustainable Construction, Seyedmahmoud Motaharikarein

UNLV Theses, Dissertations, Professional Papers, and Capstones

This study aimed to partially replace Portland Cement (PC) with environmentally friendly binders capable of improving the longevity of concrete. The new binders consisted of different proportions of natural pozzolan (perlite) with various fineness and particle size distributions. A step-by-step research program was designed to: (1) discover the optimum fineness of perlite powder and its optimum replacement level with cement; (2) investigate the rheological properties of the perlite-containing mixtures, and examine whether this binder can be used in selfconsolidating concrete; and (3) assess the weaknesses of the new binder, and improve its deficiencies by using nanomaterials such as nano-silica. The …

A Highly-Sensitive Global-Shutter Cmos Image Sensor With On-Chip Memory For Hundreds Of Kilo-Frames Per Second Scientific Experiments, Konstantinos Moutafis

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this work, a highly-sensitive global-shutter CMOS image sensor with on-chip memory that can capture up to 16 frames at speeds higher than 200kfps is presented. The sensor fabricated and tested is a 100 x 100 pixel sensor, and was designed to be expandable to a 1000 x 1000 pixel sensor using the same building blocks and similar architecture.

The heart of the sensor is the pixel. The pixel consists of 11 transistors (11T) and 2 MOSFET capacitors. A 6T front-end is followed by a Correlated Double Sampling (CDS) circuitry that includes 2 capacitors and a reset switch. The 4T …