Digital Commons Network^™

The Relationship Between Police Stress And Officer Misconduct, Leobardo Lopez-Cristobal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Recent high-profile and controversial police-related incidents have sparked an intensified public discourse on police misconduct. This has resulted in increasing calls for greater accountability and transparency within U.S. police agencies. Much of the existing research on police misconduct centers around two competing explanations: the "bad apples" perspective, which attributes misconduct to individual officers, and the "bad barrels" perspective, which points to systemic or organizational factors (Rojek, Decker, & Wagner, 2015). However, one factor that has been underexplored in the literature is the role of police stress in influencing deviant police behavior. Previous studies suggest a potential link between police-related stress …

Using Neighborhood Information To Improve Fiber Direction Estimation From Neuroimaging Data, Anjan Mandal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Accurately estimating neuronal fiber directions is crucial in neuroimaging analysis. The Ball-and-Stick Model (BSM), introduced by Behrens et al. (2003), and widely used in software tools like FSL, remains one of the most popular models for this purpose. BSM analyzes each voxel individually, based solely on its signal information.In this dissertation, we propose modifications to BSM, that incorporate signal information from neighboring voxels in the estimation process, potentially improving the accuracy of the estimates. Additionally, within the estimation process, we introduce two novel proposal distributions to enhance the efficiency of the Markov chain Monte Carlo sampling procedure on the simplex …

Α-Quartz Plastic Strength Investigation Via Diffraction Experiments On Novaculite Using A D-Dia And Elastic Plastic Self-Consistent Interpretation, Denali Jivanjee Medina

UNLV Theses, Dissertations, Professional Papers, and Capstones

The plastic response of experimentally deformed quartz provides insight into the strength of ductile shear zones that has implications for tectonic, lithospheric, and ore deposit models. We present a suite of 15 uniaxial deformation experiments on Arkansas novaculite conducted in a DDIA apparatus with in-situ synchrotron x-rays. Experimental temperatures range from 25 C to 1334 C with pressures between 1.39 GPa and 3.1 GPa, and strain rates between 1x10-5 s-1 and 9x10-6 s-1. Macroscopic sample strain ranges from 3% to 24%. d-spacings from the (101), (110), (200), (201), and (112) lattice planes were measured, producing lattice strain up to ~5%. …

Development And Testing The Predictability Of An Instrument Based On The Multi- Theory Model (Mtm) Of Health Behavior Change For Pre-Exposure Prophylaxis (Prep) Uptake Among People Of Color, Siddharth Raich

UNLV Theses, Dissertations, Professional Papers, and Capstones

HIV/AIDS continues to be a significant public health problem in the US and globally. In the US, it disproportionately affects people of color. In 2012, Pre-exposure Prophylaxis (PrEP) was approved by the FDA for HIV prevention. PrEP reduces the chances of acquiring HIV by 99% among people at high risk. However, PrEP uptake among people of color remains low. Therefore, this study aimed to develop and test the predictability of an instrument to describe the intent to initiate and sustain PrEP use among people of color. This research utilized an exploratory sequential mixed methods design based on the fourth-generation, multi-theory …

Developing A Remote Gamma Spectra Collection System For Radiation Sciences At The University Of Nevada, Las Vegas, Haven Searcy

UNLV Theses, Dissertations, Professional Papers, and Capstones

Educational institutions of all levels have been significantly impacted by the COVID-19 epidemic with none more so than higher education. The challenges faced by researchers are numerous while performing a study and have only increased since the pandemic. Many colleges or universities have halted research to cut off unnecessary contact in order to protect study participants and research personnel. In the Department of Health Physics and Diagnostic Sciences (DHPDS) at the University of Nevada Las Vegas, a solution was developed that would allow scientists and students alike to be able to analyze already prepared samples either in the lab or …

Control Of X-Delta Arm And Self-Leveling Robot Systems For Uav Applications, Prathibha Sobha

UNLV Theses, Dissertations, Professional Papers, and Capstones

The water droplet penetration test (WDPT) is an environmental assessment method for analyzing soil properties by measuring the penetration of water droplets into soil. This test provides insights into soil moisture retention and resilience, especially valuable in fire-prone or arid regions where soil recovery and erosion control are essential. Although this project does not conduct an actual WDPT, it investigates two key robotic systems designed to support such applications: an X-delta robot arm, which simulates precise droplet delivery patterns, and a self-leveling platform that ensures stability on uneven terrain, where the X-delta robot is mounted. Together, these systems examine the …

Removal Capabilities Of Zeolite And Zero Valent Iron With High-Level Waste Tank Radionuclides And Metals: Cesium, Strontium And Chromium, Colette R. Towles

UNLV Theses, Dissertations, Professional Papers, and Capstones

High level nuclear waste (HLW) has been disposed for temporary storage in underground steel tanks at the Department of Energy Nuclear sites. For example, at the Hanford Site, WA, and Savannah River Site (SRS), SC, HLW account for eighty-eight million gallons (Mgal) and 450 million Curies (MCi) of radioactivity. In the early nuclear activity at Hanford, the waste was discharged to single-shell steel tanks, and the lack of secondary containment allowed leaks, contaminating soil and groundwater. Despite tremendous efforts to stabilize the liquid waste at nuclear sites, treatment is complex, costly, and time-consuming; therefore, HLW may have to be stored …

Cultivating Nursing Student Competency Through Serious Gaming Simulation-Enhanced Prebriefing, Shopha M. Tserotas

UNLV Theses, Dissertations, Professional Papers, and Capstones

Problem: Simulation is an effective teaching strategy for undergraduate nursing students, providing a safe environment for learning in a low-risk setting. However, students are not fully prepared to take full advantage of high-fidelity simulation activities. The purpose of this study was to examine the impact of serious gaming simulation-enhanced prebriefing on student competency and simulation effectiveness. Methodology: The study employed a quantitative, cross-sectional, quasi-experimental design using secondary data. Participants included undergraduate nursing students in a southern private university. The students were enrolled in the prelicensure nursing program and the obstetric or the transition to practice course. The control group received …

Integrating Deep Traffic Prediction And Environmental Impact Assessment Using Noisy Real-World Data In Las Vegas, Tarek Bin Zahid

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis introduces an integrated framework for advanced traffic prediction and real-time emission estimation, designed to aid urban planning and environmental monitoring. Utilizing a graph-based transformer model, it predicts traffic conditions across the Las Vegas road network, drawing on spatial and temporal data from a large-scale sensor network. The study significantly expands the dataset from 26 to approximately 900 sensors, enhancing predictive accuracy and regional coverage. Inspired by masking techniques and strategies tailored to incomplete datasets, the model effectively handles real-world, noisy data without relying on resource-intensive imputation. Innovative training approaches enable robust traffic flow predictions despite missing or imperfect …

Uranium(Vi) & Thorium(Iv) Speciation In Organic Media Containing Organophosphorus & Diglycolamide Extractants, Joel Castillo

UNLV Theses, Dissertations, Professional Papers, and Capstones

Developing sustainable green energy systems is a continually growing concern as the world is faced with urgent issues of climate change and global warming. Nuclear energy provides one of the most efficient solutions to supplying power to the electrical grid without causing more carbon pollution. There are nearly a hundred thousand metric tons of used nuclear fuel (UNF) stored on-site at decommissioned nuclear power plants for an indefinite period of time. Achieving a finalized closed fuel cycle is a crucial part in developing the nuclear energy necessary for combating the issues of pollution and greener energy. Understanding actinide speciation especially …

Mechanically Cost-Effective Approach For Bipedal Walking In Robots Using Instantaneous Collision Angle, Smit R. Patel

UNLV Theses, Dissertations, Professional Papers, and Capstones

Humans, as bipedal locomotors, are effective at reducing the mechanical cost of transport (CoTmech) by adopting movement strategies and gaits that minimize energy expenditure for a given distance. By using different gaits at different speeds, leveraging their long spring-like tendons and muscle elasticity which store and release energy during movement, humans reduce the mechanical effort required for locomotion. Current locomotion solutions offered in bipedal robots, based on legacy walking and running gait models, are not great at energy efficiency unless walking at very low speeds. Additionally, the control system of robots, designed to ensure stability and adaptability, requires substantial resources, …

Nuclear Fuel Cycle Chemistry: A Density Functional Study, Eduardo Montoya

UNLV Theses, Dissertations, Professional Papers, and Capstones

The nuclear fuel cycle aptly describes the life cycle of nuclear fuel sources such as uranium. From its early forms in naturally bearing ores, to its high-temperature sintering into a fuel pellet, the chemistry uranium experiences throughout the fuel cycle is diverse, driving many experimental efforts towards understanding its chemistry to both improve nuclear technologies and advance the safety and handling of nuclear materials. Computing techniques and methodologies can be used to supplement experimental research and are readily available to researchers interested in utilizing computing-based data to support experimental findings. Density functional theory (DFT) is commonly practiced, reliably predicting the …

Addressing Low Molecular Weight Chemical Peaking Events During Direct Potable Reuse By Granular And Biological Activated Carbon, Ceonie Washington

UNLV Theses, Dissertations, Professional Papers, and Capstones

Direct Potable Reuse (DPR) is an innovative solution designed to address water scarcity by treating wastewater to directly produce safe drinking water. As droughts and water shortages become more frequent, DPR offers a sustainable and localized water supply by incorporating advanced treatment processes. DPR systems typically rely on a combination of technologies such as ozone followed by biological activated carbon (O3/BAC), reverse osmosis (RO), and advanced oxidation processes (AOPs) to remove a wide range of contaminants. However, low molecular weight organic compounds (LMWCs), particularly volatile organic compounds, can sometimes pass through RO membranes and AOP systems.

California's DPR regulations currently …

Directional Web Strikes Performed By Ray Spiders In Response To Airborne Prey Vibrations, Sarah Han, Todd A. Blackledge

University Research

Most orb-weaving spiders use static webs that deform only after flying prey hit the webs. However, ray spiders (Theridiosoma gemmosum) pull orb webs into cones that are loaded with enough elastic energy to snap back like slingshots at accelerations of up to 504 m s−2 once released. We test the hypothesis that ray spiders sense vibrations from flying insects to release their webs and capture prey in mid-flight. We show that spiders release webs in response to live tethered mosquitoes that are not touching silk. Web release is most likely when mosquitoes are in front of the web and within …

2023 Carroll County Advisory Council Minutes And Agendas, Mikayla Cerney

UNH Cooperative Extension

No abstract provided.

Biological Reinforcement Learning Simulation For Natural Enemy -Host Behavior: Exploring Deep Learning Algorithms For Population Dynamics, Komi Mensah Agboka, Emmanuel Peter, Erion Bwambale, Bonoukpoè Mawuko Sokame

All Peer-Reviewed Publications

This study introduces a simulation of biological reinforcement learning to explore the behavior of natural enemies in the presence of host pests, aiming to analyze the population dynamics between natural enemies and insect pests within an ecological context. The simulation leverages on Q-learning, a reinforcement learning algorithm, to model the decision-making processes of both parasitoids/predators and pests, thereby assessing the impact of varying parasitism and predation rates on pest population growth. Simulation parameters, such as episode count, duration in months, steps, learning rate, and discount factor, were set arbitrarily. Environmental and reward matrices, representing climatic conditions, crop availability, and the …

Investigation Of Curing Kinetics Analysis And Their Effects On Properties Of Epoxy: Polystyrene Blending, Zahraa Imran Mousa, Najim. A.Saad

Baghdad Science Journal

The effect of curing conditions, such as temperature, concentration of toughening material, such as polystyrene, on epoxy resin cure kinetics was studied, along with the effects of curing parameters, such as degree of cure (α) and glass transition temperature (Tg), mechanical properties, thermal properties (TGA), and morphology of epoxy and its blends. Tg, degree of cure, and thermal stability measures were calculated from a DSC chart, mechanical properties (tensile strength, elastic modulus, and elongation at break) were measured using a universal tensile machine, the curing process was the same for all samples with varying temperatures, and the morphology of fracture …

Determination Of Human Hair Components By Spectrophotometric Methods For The Diagnosis Of Thyroid Diseases, Fatima H. Salih, Shaimaa S. Mahdi, Alaa H. Ali

Baghdad Science Journal

Human hair is a vital tissue, rich in minerals and vitamins that have an effective role in the production of enzymes, hormones and other substances necessary for normal growth, it is considered an indicator of any defect in the performance of body functions at all stages of life, so the use of hair in the diagnosis of diseases is a challenge in the clinical laboratory, as it will be easy to frequently monitor diseases, and it will have an impact on medical research and treatment. For instance, hypothyroidism occurs when the thyroid gland does not secrete enough thyroid hormone into …

On Pre­ Open Regular Spaces, Afraa R. Sadek

Baghdad Science Journal

In this paper, certain types of regularity of topological spaces have been highlighted, which fall within the study of generalizations of separation axioms. One of the important axioms of separation is what is called regularity, and the spaces that have this property are not few, and the most important of these spaces are Euclidean spaces. Therefore, limiting this important concept to topology is within a narrow framework, which necessitates the use of generalized open sets to obtain more good characteristics and preserve the properties achieved in general topology. Perhaps the reader will realize through the research that our generalization preserved …

Carbon Footprint For Industry -Al-Rasheed Vegetable Oil Factory, Elham M. Al-Bayati, Jinan S. Al-Hassan

Baghdad Science Journal

This is a comprehensive study to calculate the carbon footprint of the Al-Rasheed vegetable oil factory in gaining a clear understanding of the environmental impact and identifying opportunities for emission reduction and sustainability improvement and to provide an overview of the key elements and objectives of the current study. Utilizing industry-standard calculation methodologies and emission factors specific to Al-Rasheed Factory and geographic location, we analyzed the collected data to quantify Al-Rasheed carbon emissions across only scope 1(Direct GHG Emissions via the burning of fossil fuels) measured by using the latest IPCC 2021 version 1.02 GHG Protocol and the SimaPro version …

Free The Market: How We Can Save Capitalism From The Capitalists, Mark A. Lemley

UC Law Journal

The free market works because no one person or company is making the decisions. In a competitive market, businesspeople make the wrong decisions all the time, just as central planners do. But the consequences of those decisions don’t infect the market as a whole. Businesses that guess wrong lose money or go out of business. But as long as there is a competitor out there who guesses right, the market provides people what they want.

But it turns out that the very last thing capitalists want is a free market. Capitalism may thrive under conditions of robust market competition, but …

Debt End: The “Texas Two-Step” And The Constitution, Kirk Rider

UC Law Journal

The “Texas Two-Step” is a novel means of forcing a settlement agreement on mass-tort claimants. Corporations utilize the Two-Step bankruptcy strategy using a state law merger statute to split itself in two. One half of the corporation retains all the value, and the other half retains all the liabilities associated with the mass tort claims. The shell-company, which inherits the liabilities and then files a bankruptcy petition, uses the Bankruptcy Code’s powers to attempt a forced settlement on all current and future litigants and shield its financially healthy parent company in the process. Throughout this Note, I will survey the …

Patent Infringement, Private Law, And Liability Standards, Robert P. Merges

UC Law Journal

Private law governs interactions among private parties. A large body of private law theory holds that private law is aimed at corrective justice: doing justice as between the two parties to a private interaction (the private law dyad). This in contrast to public law, the law of state-citizen interactions, whose purpose is usually said to be the pursuit of society-wide fairness, often understood as distributive justice. Torts, contracts and property are the three classic areas of private law in common law jurisdictions. A sizeable literature now concerns itself with classic private law topics as they apply to intellectual property (IP). …

Environmental Transport And Sorting Of Glass Retroreflective Microbeads And Their Potential As Proxies For Road Marking Paints, Andrew Turner, Adam Bridgwater, Emily Marshall

School of Geography, Earth and Environmental Sciences

Road marking paints are a potentially important contributor to the global microplastic pool but very little reliable information is available on their erosion or environmental distributions. As potential carriers of or proxies for road paints, we determine the concentrations and sorting of retroreflective glass microbeads in marking materials and in fractionated (< 5 mm) local dusts, soils and sediments. As an aid to our investigation, we also determine the concentrations of metals of geochemical significance or components of road paint pigments in markings and geosolids. Concentrations of beads up to 92,800 kg⁻¹ were observed in street dusts, with a median diameter (350 μm) greater than that in road marking samples (270 μm). Few beads were found in adjacent (< 5 m) or more remote soils (six beads in ten 50-g samples) and none were detected in replicates of a sample of roof dust, suggesting that aeolian transport is limited. Concentrations up to 3700 kg⁻¹ were found in estuarine sediments close to bridges or stormwater runoff effluents, and with increasing sediment depth concentrations and …

Breaking The Grid: Metamorphosis And Materiality In Meret Oppenheim’S An Evening In The Year 1910, Jacklyn Meyer

Theses

This paper analyzes Meret Oppenheim’s painting An Evening in the Year 1910 from 1972 and its exploration of the theme of metamorphosis and materiality. Looking at certain biographical information about the artist’s crisis period and time spent with the Surrealist group is crucial in understanding what can be discerned from viewing this work. Other works with the theme of metamorphosis within her oeuvre are studied as they provide further context for Oppenheim’s artistic philosophy and her penchant for revisiting themes repeatedly. Other works with the theme of metamorphosis are studied as they provide further context for Oppenheim’s artistic philosophy and …

Project-Based Learning In Art History: Course Curriculum, Katelyn Baltes

Theses

The course entitled “Project-Based Learning in Art History” is a rigorous curriculum that introduces students to art history but creates a better understanding of how materials and techniques were used throughout time. Students in 11-12th grade will be able to apply their knowledge and learning through projects integrated within each unit to develop a stronger understanding of the content. Students will be able to apply the design elements and principles of design within their artwork and recognize the different characteristics of various periods and cultures. There will be the use of two-dimensional and three-dimensional art within each unit, and students …

The Intersection Of Interactive Narrative And Flow State Immersion: An Exploration Of Trauma, Resilience, And Post-Traumatic Growth, Tiffani Barner

Theses

This work investigates the benefits of interactive narratives in conjunction with flow state immersion for individuals with Post-Traumatic Stress Disorder. A specific focus is placed on narratives that contain dark or horror-based themes. In addition, the importance of selfauthorship, representation, and empowerment are explored. Accompanying the examination of flow state, concepts such as challenge, failure, and the motivation to succeed at challenging tasks are analyzed. This work also includes a survey pertaining to user preferences regarding media and genre preferences. The goal of this project is to design an interactive user experience that activates flow state while also providing an …

Beauty Beyond Barbed Wire: Chiura Obata’S Perspective Of The Horizon, Bri Carlson

Theses

Depictions of the environment are an integral part of American art history because they convey cultural relationships of all who inhabited the land. The environment is often a stagnant force that harbors lifetimes of human history. One of these histories is the incarceration of about 120,000 Japanese immigrants and American citizens in 1942 after the bombing of Pearl Harbor. They were forced to evacuate their homes, lives, and families to live in detention centers and prison camps where living conditions were subpar. Many turned to art making to cope, and some artists used their work to silently protest and visually …

Beauty In The Mundane, Madeline Caniglia

Theses

This project focuses on challenging what compositions are considered valuable as art. The primary focus is on the relationship between light and shadow and how it contributes to the revelation of finding beauty in the mundane. This project involves studying old masters like Caravaggio and Edward Hopper while employing their techniques and methods in my artworks. Through a series of oil paintings, I depicted everyday objects and scenes to demonstrate how classical techniques, paired with contemporary subjects, help bridge historical and artistic practices with modern art.

Reframing The Canon: Black Contemporary Artist Shaping The Western Narrative, Elaysha A. Bazil

Theses

Reframing the Canon is an exhibition and thesis project that centers on Black Contemporary artists and their pivotal contributions to the Western art canon. Curated by Art BaziL, the exhibit challenges traditional narratives and biases, creating a space where Black art is celebrated as integral rather than supplemental. Through a collection of multi-medium works—from abstract paintings to digital art and handcrafted jewelry—the exhibit invites viewers to experience Black creativity beyond themes of struggle, highlighting resilience, innovation, and beauty. This project responds to the historical exclusion of Black voices within mainstream art institutions, advocating for a more inclusive and representative canon. …