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The Emergence Of Serviced Apartments/Apart-Hotels And Opportunities Post Covid-19, Ding Jie Ang
The Emergence Of Serviced Apartments/Apart-Hotels And Opportunities Post Covid-19, Ding Jie Ang
UNLV Theses, Dissertations, Professional Papers, and Capstones
Serviced apartments are becoming more mainstream as people become more aware of this asset class. Since the onset of Covid-19, people have opted for serviced apartments instead of a hotel for self-contained, typically with more space with a living area, kitchen and access to laundry facilities throughout the pandemic. Combined with lower operating costs, higher profit margin, and lower cost per key at development revealed the financial resilience of this asset class as most serviced apartments operated at a higher occupancy than hotels. With renewed interest from developers and owners keen to build or convert their existing properties to serviced …
Nexuscapes: A Landscape Approach For A Transdisciplinary Water-Energy-Food Nexus Decision-Making Process, Fortino Acosta
Nexuscapes: A Landscape Approach For A Transdisciplinary Water-Energy-Food Nexus Decision-Making Process, Fortino Acosta
UNLV Theses, Dissertations, Professional Papers, and Capstones
This study develops a reliable transdisciplinary framework for complex ecological and social systems by characterizing, mapping, typifying, assessing, and testing enhanced water-energy-food nexus scenarios under critical time constraints, specialized skills, or sensitive data accessibility. Detached management of limited essential resources like fresh water, reliable energy from renewable sources, and nutritious food can jeopardize regional economies and governance. Using a novel landscape approach, this study recommends a decision-making the framework focused on the circular economy that induces collaboration among diverse sectors and brings strategic coordination, specificity, and magnitude to the proposed solutions. The study elaborates on a decision-making tool that integrates …
Beyond The Numbers: A Deeper Dive Into The Dearth Of Girls And Women In Stem, Jennifer John Buck
Beyond The Numbers: A Deeper Dive Into The Dearth Of Girls And Women In Stem, Jennifer John Buck
UNLV Theses, Dissertations, Professional Papers, and Capstones
Despite decades of research attempting to better understand the dearth of girls and women in science, technology, engineering, and math (STEM), gender imbalances persist in many STEM fields. This is particularly the case in math-intensive STEM fields. The current program of research used mixed-methods research to better understand these inequities. The first paper identified gender and ethnic variation in how undergraduates reason about STEM inequities. The second paper found that how emerging adults narrate “turning points” in their relationship with math was associated with their current math outcomes and future plans to pursue math. The final paper demonstrated that how …
Markers Of Neuroinflammatory And Degenerative Processes In Professional Athletes With Traumatic Encephalopathy Syndrome, Brooke Conway Kleven
Markers Of Neuroinflammatory And Degenerative Processes In Professional Athletes With Traumatic Encephalopathy Syndrome, Brooke Conway Kleven
UNLV Theses, Dissertations, Professional Papers, and Capstones
Introduction: The clinical criteria for Traumatic encephalopathy syndrome (ccTES) were developed to improve the diagnosis of Chronic traumatic encephalopathy (CTE). This study aimed to determine whether there was an association between a clinical diagnosis of Traumatic encephalopathy syndrome (TES) and changes in serum biomarkers, balance, neuroimaging, and cognition among athletes in the Professional Athletes Brain Health Study (PABHS).Methods: Of the cohort, 130 professional fighters met age or retirement criteria and went to a consensus conference, with 52 fighters (40%) meeting the criteria for TES. A generalized linear model with generalized estimating equations was utilized to assess the odds of disease …
Dynamic Surface Tension Of Surfactants Through Separation Of Diffusion And Dilation Effects, Brandon Ortiz
Dynamic Surface Tension Of Surfactants Through Separation Of Diffusion And Dilation Effects, Brandon Ortiz
UNLV Theses, Dissertations, Professional Papers, and Capstones
Surfactants are biphilic monomers that adsorb to interfaces and have the ability to reduce interfacial tension. From this reduction in interfacial tension, surfactants are able to function as emulsifiers, detergents, and wetting agents among a variety of other things. Despite their ubiquity surfactants and surfactant behaviors, in particular those in highly dynamic environments, are not yet well characterized. In these environments, surfactants undergo significant distortions to droplet, bubble, and foam geometries which induce changes to the surface tension. This establishes a need to understand how surfactants respond to distortions of geometry through diffusion and dilational effects. To address this need, …
The Metabolic Change Of Lipid Species In Stam Mice With Hepatocellular Carcinoma, Devin J. Peart
The Metabolic Change Of Lipid Species In Stam Mice With Hepatocellular Carcinoma, Devin J. Peart
UNLV Theses, Dissertations, Professional Papers, and Capstones
Primary liver cancer hepatocellular carcinoma (HCC) is the second leading cause of cancer death worldwide. In the US, primary liver cancer is the most rapidly increasing type of cancer due to increases in hepatitis B and C and the continued trend of greater and greater percentages of the population suffering from obesity, diabetes mellitus and metabolic syndrome. The prognosis for this disease is poor, with a 5-year survival rate of 26% as compared to only 2% when the cancer is metastatic. Unfortunately, current strategies for early detection of HCC, including routine CT imaging or alpha-fetoprotein biomarker, are suboptimal and tend …
Quantifying The Effect Of Disturbance On Native Mojave Desert Shrubs, Tamara J. Wynne
Quantifying The Effect Of Disturbance On Native Mojave Desert Shrubs, Tamara J. Wynne
UNLV Theses, Dissertations, Professional Papers, and Capstones
Disturbance can come in many different forms. In our studies, we looked at the impact of a solar photovoltaic facility on native plants growing inside and outside of the facility, alteration in precipitation (simulated) on four native shrubs and the impact of applying supplemental water as a function of volume and frequency to establish native shrubs such as might occur at restoration sites. Disturbance is becoming a more common phenomenon in many ecosystems throughout the world, increasing the need for studies that quantify the impact at the plant and ecosystem level. Each research project revealed different plant responses, such as …
Technology-Based Self-Management Of Initiations For Students With Autism Spectrum Disorder And Low Communication Who Participate In An Alternate Assessment, Amelia Fuqua
UNLV Theses, Dissertations, Professional Papers, and Capstones
Self-management as a behavioral intervention has been used with students who have autism spectrum disorder for a variety of behavioral targets, including communication. Research has been conducted on self-management of communication initiations for students who have autism spectrum disorder in primary grades through high school. The process of self-management includes monitoring one’s own behavior to change that behavior. Currently, there are no studies using technology with self-management for the initiations of students with autism spectrum disorder and low communication who also participate in an alternate assessment. The purpose of this study was a systematic replication of Newman and Ten Eyck …
Effects Of Particle Size And Replacement Proportion Of Post-Consumer Glass In Concrete, Negasi Gebremichael
Effects Of Particle Size And Replacement Proportion Of Post-Consumer Glass In Concrete, Negasi Gebremichael
UNLV Theses, Dissertations, Professional Papers, and Capstones
Concrete, next to water, is the most used material (Gagg, 2014), which consumes natural or manufactured aggregates and resource-intensive cement. Concrete is also a more wasteful construction material than timber and steel. Depleting the natural resource due to aggregate extraction and the environmental unfriendliness of cement production have left the construction industry with no choice. Reducing waste, reusing, or recycling can help conserve natural resources. In this regard, the construction industry constantly seeks full or partial replacement of concrete aggregates and cement with recycled material. Glass is a candidate for replacing the three major components: cement, fine aggregate, and coarse …
Mesozoic Sevier Thrusts Overprinted By Miocene-Quaternary Left-Lateral Deformation: Structures And Tectonism Of The Kane Springs Wash Region, Nevada, Andrew Reid
UNLV Theses, Dissertations, Professional Papers, and Capstones
Recognizing how rifts develop through space and time is vital to enrich our understanding of continental breakup. Rifts are commonly segmented by transfer or accommodations zones that form as the rift develops due to differences in the onset, direction, magnitude, or rates of extension on either side of the transfer or accommodation zone. The Basin and Range province is a wide rift where Cenozoic extension overprints and exposes earlier Mesozoic Sevier fold-thrust belt shortening structures. This exposure allows Sevier thrust correlations between individual mountain ranges and use of these shortening structures to study rift segmentation by strike-slip transfer faults. The …
Display Applications For Grating Angle Magnification Accelerated Angular Scanners, Daniel Jesus Valdes
Display Applications For Grating Angle Magnification Accelerated Angular Scanners, Daniel Jesus Valdes
UNLV Theses, Dissertations, Professional Papers, and Capstones
This work includes experimental demonstrations of grating angle magnification accelerated optical beam scanners. Diffraction grating scanners governed by the grating equation can have scan speed advantages over the flat mirror bound by Snell's law of reflection. Scan speed enhancement of 750% was achieved with a 635nm laser and 1800 groove/mm diffraction grating configuration thanks to the grating angle magnification. A three-color diffraction grating scanner shows identical results at larger scan angles. Tunable acceleration speed is a feature enabled by the diffraction grating scanner to operate in a high-speed scanning region and/or high-resolution scanning region depending on the demands of the …
The Impact Of The Covid-19 Pandemic On Online Food Delivery Apps, Lauren Morell
The Impact Of The Covid-19 Pandemic On Online Food Delivery Apps, Lauren Morell
UNLV Theses, Dissertations, Professional Papers, and Capstones
The restaurant industry continues to change as Online Food Delivery apps (OFD) continue to gain more popularity because of the COVID-19 pandemic. The food delivery market has grown over 52% since the start of the pandemic. Online food delivery app platforms like DoorDash, UberEats, and Postmates began to offer delivery over the past decade, rapidly growing with the help of ghost kitchens. Consumer behavior factors and intention to use OFDs have changed as more advanced app technology becomes available, and as the restaurant industry navigates the COVID-19 pandemic restrictions. Many consumers favor mobile delivery apps overall convenience and perceived usefulness. …
Calcite Spherulite Formations And Their Controls In Halophilic Bacterial Cultures, Zakaria Jibrin
Calcite Spherulite Formations And Their Controls In Halophilic Bacterial Cultures, Zakaria Jibrin
UNLV Theses, Dissertations, Professional Papers, and Capstones
This study arose from an accidental discovery of calcite spherulites forming on colonies of various halophilic bacteria grown on solid Luria-Bertani medium made containing water from a brine pool in Death Valley, their natural habitat. Further studies with a large spherulite forming bacteria, Pseudoalteromonas haloplanktis, showed that calcite precipitation conditions were the consequence of bacteria using amino acids as a source of carbon and energy, a metabolism that produces NH3 and CO2 waste products. NH3 raises the pH of the medium, turning CO2 into CO32-. Calcium in the natural brine combines with CO32-. The resulting spherulitic calcite precipitation is nano-acicular …
A Control Integrated Circuit For A Hysteretic Flyback Power Converter, Armani Alvarez
A Control Integrated Circuit For A Hysteretic Flyback Power Converter, Armani Alvarez
UNLV Theses, Dissertations, Professional Papers, and Capstones
This Thesis reports the design, simulation, and layout of a switching power supply controller chip for a fly-back switching power supply. The controller chip was designed using ON’s Semiconductor C5 process. The resulting switching power supply using the controller chip consists of using various off-chip components such as a power MOSFET, transformer, and capacitors. The main components used in the integrated circuit include a bandgap reference voltage circuit which outputs a reference voltage of 1.25V, a ring oscillator having a nominal frequency of 5MHz, a high-gain comparator, and a buffer that can drive a 5pF capacitor. Under normal simulation conditions …
Insights On Factors Influencing Startup Failure In The Hospitality Industry, Shivangi Khurania
Insights On Factors Influencing Startup Failure In The Hospitality Industry, Shivangi Khurania
UNLV Theses, Dissertations, Professional Papers, and Capstones
Hospitality businesses and innovative startups have faced extremely high failure rates. The author provides insights on the factors that impact startup failure in the hospitality industry after performing a deep analysis on innovation frameworks such as the diffusion of innovation theory, the theory of disruptive innovation, and the ten types of innovation framework. Not only that, the author also provides insights based on their own personal experience and knowledge gained through education at the University of Las Vegas, Nevada. The research explored in this paper revealed that startup failure is not based on one factor alone and how leaders in …
Alleviating Labor Crunch In Singapore's Hospitality Industry, Chuah Peini
Alleviating Labor Crunch In Singapore's Hospitality Industry, Chuah Peini
UNLV Theses, Dissertations, Professional Papers, and Capstones
The acute shortage of manpower in hospitality workforce has been a persistent problem in Singapore throughout these years which adversely affects both the managerial and lower-skilled occupational groups of employees. The pandemic has further accelerated human resource issues across the country in 2020. It particularly hits the hospitality industry hard since hotel businesses are highly human-centric and the unprecedented world event has adversely resulted in severe manpower leakages and a dilution of talent pool. This paper will analyze the reasons, severity and impact of the manpower shortage within the hospitality industry in Singapore, focusing on service quality. Lastly, the author …
Application Of Experimentally Calibrated Numerical Models For Prediction Of Composite Masonry Prism Strength, James Bristow
Application Of Experimentally Calibrated Numerical Models For Prediction Of Composite Masonry Prism Strength, James Bristow
UNLV Theses, Dissertations, Professional Papers, and Capstones
The composite masonry prism test is a common laboratory test to determine the compressive strength of a set of masonry prisms (f’mt) to verify that the composite masonry prism assembly, and more importantly, the constituent materials, are providing adequate strength. While constructing masonry structures, the subcontractors, designers, and inspectors rarely provide continuous supervision or inspection of the construction process. Accordingly, verification of grout mix design, mixed proportions, proper installation of blocks, placement of mortar, dimensions of joints, etc. are more traditionally performed on a periodic basis instead. However, through the use and review of the composite masonry prism test results, …
Age And Genesis Of W-Mo-Cu Mineralization, Gold Hill, Utah, Nathan J. Carey
Age And Genesis Of W-Mo-Cu Mineralization, Gold Hill, Utah, Nathan J. Carey
UNLV Theses, Dissertations, Professional Papers, and Capstones
Utah's Gold Hill mining district hosts a Jurassic felsic pluton (~80 km^2) that was emplaced into a Mississippian to Pennsylvanian carbonate-dominated sedimentary sequence and is spatially associated with numerous polymetallic mineral deposits. This study focuses on W-Mo-Cu mineralization at the Lucy L., Doctor, Yellow Hammer, Reaper, and Rustler deposits within the district. The new, detailed petrographic observations, mineral chemistry (on scheelite, molybdenite, chalcopyrite, magnetite, garnet, and pyroxene), and Re-Os molybdenite geochronological data presented here allows for the determination of key mineral associations and paragenesis, the characterization of deposit types and their evolution, and the constraining of the relative and absolute …
Payment Profiles: Using Payment Transaction Data To Identify And Characterize Gamblers, Kasra Ghaharian
Payment Profiles: Using Payment Transaction Data To Identify And Characterize Gamblers, Kasra Ghaharian
UNLV Theses, Dissertations, Professional Papers, and Capstones
Payment providers in the gambling industry facilitate transactions, allowing customers to transfer money to and from wagering accounts. Payments transaction data is information that is captured from these transactions, including, for example, the type, amount, time, and location. How this data may be used for gambling harm minimization and prevention has garnered significant interest, particularly due to accelerated payments modernization in the wake of the COVID-19 pandemic. With this study, I explored the utility of payments transaction data to categorize subgroups of gamblers in order to identify individuals who may be at-risk of harm. I benchmarked six cluster analysis methods …
Covid-19 Isolation Compliance Among Students And Employees Of A Large Public University, Nicolette Harmon
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 …
Hydrogeologic Heterogeneity Identification: Using Inverse Modeling Of Synthetic Borehole Temperatures To Predict Groundwater Flux, Kevin Heintz
UNLV Theses, Dissertations, Professional Papers, and Capstones
Heat has been effectively used as a groundwater tracer for decades, and high-resolution temperature data can better identify and quantify discrete flow zones. Refinements to the numerical modeling of advective heat transfer in borehole temperature sensing deployments can improve understanding of dynamic hydrogeologic systems. In my thesis, I develop a novel two-dimensional coupled radial groundwater flow and heat transfer numerical model that considers intra-borehole vertical flow. To test the performance of this model, I used finite element analysis to generate synthetic data sets consisting of prescribed variable flow fields and resulting borehole temperatures. I input synthetic temperatures into the two-dimensional …
Towards The Electronic Response Of Carbon-Based Van Der Waals Heterostructures In A Diamond Anvil Cell, George Thomas Foskaris
Towards The Electronic Response Of Carbon-Based Van Der Waals Heterostructures In A Diamond Anvil Cell, George Thomas Foskaris
UNLV Theses, Dissertations, Professional Papers, and Capstones
The nanoscale regime of materials has been at the forefront of research and interest in condensed matter physics for many years. In a merger of the fields of two-dimensional (2D) materials and high pressure physics, we present an investigation of the electronic response of carbon-based, van der Waals (vdW) heterostructures in a diamond anvil cell (DAC). Combining these fields presents us with the ability to study the characteristics of such systems both optically, and through electrical transport. Properties such as conductance, band structure, and layer number are considered. The samples in this study are assembled using exfoliation and stacking techniques …
Study Of Narrative Effects Of Each Instrumental Group In Exemplum: In Memoriam Kwangju By Isang Yun, Jeahyun Jo
Study Of Narrative Effects Of Each Instrumental Group In Exemplum: In Memoriam Kwangju By Isang Yun, Jeahyun Jo
UNLV Theses, Dissertations, Professional Papers, and Capstones
Isang Yun (1917–1995) is recognized as one of the most notable avant-garde Korean composers of the twentieth century. His compositions serve as a crucial link between Eastern and Western musical traditions because they contain elements of techniques from both traditions. My intention in this paper is to examine Yun and his symphonic poem Exemplum: in Memoriam Kwangju with the goal of helping the reader comprehend its narrative effects. I will also provide a musical analysis and interpretation based on Yun’s intention in composing Exemplum: in Memoriam Kwangju and examine Yun’s compositional approaches to the three different instrumental groups (strings, wind, …
Salesperson-Customer Dyads In The Casino Gaming Industry: How Sales Competencies And Relationship Lifecycles Influence Customer Satisfaction And Account Profitability, Alicia Lechtenberger
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 …
Characterization Of The Isothermal Titration Calorimetry Single Injection Method Using T4 Polynucleotide Kinase As A Model System For Kinases, Rebecca Chaehee Lim
Characterization Of The Isothermal Titration Calorimetry Single Injection Method Using T4 Polynucleotide Kinase As A Model System For Kinases, Rebecca Chaehee Lim
UNLV Theses, Dissertations, Professional Papers, and Capstones
Kinases are an important class of enzymes involved in the regulation of different cellular processes. The dysfunctional activity, either hyperactivity or inactivity, of kinases has been associated with many types of diseases, making kinases a major therapeutic target. As of 2020, more than 80 kinase inhibitors have been FDA-approved and have revolutionized the treatment for progressive disorders such as cancers and Alzheimer's diseases. However, there is always the possibility of developing severe side effects or resistance to drugs so the search for new therapeutics must continue with efficiency and accuracy.Isothermal titration calorimetry (ITC) is a state-of-the-art technique specialized in detecting …
Dimensionality Of Natural Auditory Scene Perception: A Factor Analysis Study, Margaret A. Mcmullin
Dimensionality Of Natural Auditory Scene Perception: A Factor Analysis Study, Margaret A. Mcmullin
UNLV Theses, Dissertations, Professional Papers, and Capstones
Theories of auditory and visual scene analysis suggest the perception of scenes relies on the identification and segregation of objects within it, resembling a detail-oriented processing style, but it is possible that a global-oriented process also occurs while evaluating auditory scenes. There is evidence for global properties that enable rapid recognition of visual scenes, even without recognizing the individual objects comprising the scene. It is our understanding that a similar line of research has not been explored in the auditory domain; therefore, we evaluated the contributions of high-level global and low-level acoustic information to auditory scene perception. A secondary aim …
Transient Sources And How To Study Them: Selected Topics In Multi-Messenger Astronomy, Jiawei Luo
Transient Sources And How To Study Them: Selected Topics In Multi-Messenger Astronomy, Jiawei Luo
UNLV Theses, Dissertations, Professional Papers, and Capstones
The discovery of cosmic neutrino flux by IceCube, and the multi-messenger observations of gravitational event GW170817 ushered in the era of multi-messenger astronomy. Since the Universe itself is a natural laboratory, multi-messenger astronomy can help us study the most extreme physics processes in great detail. In this dissertation, we touch on some of the currently unanswered questions involving different types of transient sources and different “messengers” of multi-messenger astronomy. We employ a variety of analysis methods, including machine learning, a method that has not yet been widely adopted in astronomy but is rapidly gaining momentum.We start this dissertation with Chapter …
Covid-19 Vaccine Acceptance Behavior Among Hispanics/Latinxs In Nevada: A Theory-Based Analysis, Tara Marie Naoe Tacderan Wong Nerida
Covid-19 Vaccine Acceptance Behavior Among Hispanics/Latinxs In Nevada: A Theory-Based Analysis, Tara Marie Naoe Tacderan Wong Nerida
UNLV Theses, Dissertations, Professional Papers, and Capstones
The COVID-19 pandemic has impacted many lives around the world, leaving negative repercussions including health effects, economic downturns, and social and physical restrictions. The pandemic has also revealed many disproportionate health impacts on vulnerable populations, especially among the Hispanic and Latinx populations. The use of the three COVID-19 vaccines in the United States has presented a form of protection against additional negative impacts. However, hesitancy toward the COVID-19 vaccine has hindered its rapid uptake, preventing the country from reaching herd immunity and ultimately ending the pandemic. Current research is minimal in understanding the intentions of receiving the COVID-19 vaccine among …
Disentangling Instrumental And Reactive Aggression In The Competitive Reaction Time Task And Their Associations With Factors Of Meanness In Psychopathy, Ashley Michelle Poston
Disentangling Instrumental And Reactive Aggression In The Competitive Reaction Time Task And Their Associations With Factors Of Meanness In Psychopathy, Ashley Michelle Poston
UNLV Theses, Dissertations, Professional Papers, and Capstones
Aggression is often subtyped into reactive and instrumental aggression. Reactive aggression occurs in response to some form of provocation and is often accompanied by anger. Instrumental aggression is not provoked and is relatively unemotional. Existing aggression paradigms primarily measure reactive aggression, and the laboratory measurement of instrumental aggression has proved challenging. This study modified the competitive reaction time task to include an entire block of instrumental aggression trials, in addition to the standard block of reactive trials, in effort to create a single paradigm within which both reactive and instrumental aggression can be measured in the laboratory. Psychopathy is a …
Automated Approach For The Enhancement Of Scaffolding Structure Monitoring With Strain Sensor Data, Sayan Sakhakarmi
Automated Approach For The Enhancement Of Scaffolding Structure Monitoring With Strain Sensor Data, Sayan Sakhakarmi
UNLV Theses, Dissertations, Professional Papers, and Capstones
Construction researchers have made a significant effort to improve the safety of scaffolding structures, as a large proportion of workers are involved in construction activities requiring scaffolds. However, most past studies focused on design and planning aspects of scaffolds. While limited studies investigated scaffolding safety during construction, they are limited to simple cases only with limited failure modes and simple scaffolds. In response to this limitation, this study aims to develop an automated scaffold monitoring approach capable of monitoring large scaffolds. Accordingly, this study developed an automated scaffold safety monitoring framework that leverages sensor data collected from a scaffold, scaffold …