Digital Commons Network^™

Using Gamification As Scaffolding To Support Children As They Formulate Initial Keyword-Based Search Queries, Benjamin John Bettencourt

Boise State University Theses and Dissertations

Child searchers, ages six to twelve, are known to struggle when it comes to using mainstream search engines. One such struggle that has been identified is the query formulation process, including initial query formulation. Two avenues of assistance that have shown promise in assisting users in other endeavors are gamification and scaffolding. In an attempt to provide assistance tailored to child searchers in their initial query formulation processes, this research explores the use of a gamified scaffold built with the purpose of teaching more effective, keyword-based, query formulation practices. To study the efficacy of utilizing a gamified scaffold to support …

Assembly And Characterization Of 10 Cm × 10 Cm Cold Atmospheric Pressure Plasma Device, Sumona S. Islam

Boise State University Theses and Dissertations

The primary purpose of this thesis is to assemble, demonstrate, and characterize a Cold Atmospheric Pressure dielectric barrier discharge plasma array of large active plasma discharge region (10 cm × 10 cm). The array is fabricated using the Low Temperature Co-Fired Ceramic (LTCC) dielectric material system and silver paste in printing electrodes. It is important to find the optimal operating parameters of the device to achieve uniform emission and to achieve the best response out of the device, which is the main focus of this thesis. The device is assembled from 43 linear discharge elements. Several I-V sweep measurements, capacitance …

The White Peacock – A Masculinity Study, Katherine Pollert

All-Inclusive List of Electronic Theses and Dissertations

At the beginning of the twentieth century, the feminist movement in England was making significant progress, effectively influencing the leading artists and scholars of the time to consider the nature of female oppression and to do their part to invoke change. Among these figures, D.H. Lawrence emerged as a provocative voice on gender and sexuality. To this day, his work remains a source of significant contention, often due to the controversial representation of gender and sexuality in his novels. For decades, feminist critics have debated Lawrence’s characterization of women, some accusing his work of misogyny, with others praising his careful …

Heavy Metals In Rural Soils: A Case Study In Jennings County, Indiana, Madeline Hill

All-Inclusive List of Electronic Theses and Dissertations

Heavy metals, such as lead and mercury, can be toxic if exposure levels are too high. People are often concerned about lead exposure from water or paint, but soil is another potential exposure avenue for many metals. While some heavy metals, including mercury and lead, are found in emissions from coal-burning power plants and from incinerators, many metals accumulate in soils from past uses (ex. lead paint, leaded gasoline, chemical spills, industrial emissions, and natural occurrences). It is important to have soil tested to check metal concentrations because consumption or inhalation of these metals can lead to permanent damage and …

On Representations Of The Super-Yangian Of The Queer Lie Superalgebra, Elena Poletaeva

School of Mathematical & Statistical Sciences Faculty Publications

Let Q(n) be the queer Lie superalgebra. We determine conditions under which two 1-dimensional modules over the super-Yangian of Q(n) can be extended nontrivially. We describe the dual modules of the simple finite-dimensional modules over YQ(1) . We use these results to describe blocks in the subcategory of finite-dimensional YQ(1) -modules admitting the zero generalized central character.

Modelling Tinnitus Functional Index Reduction Using Supervised Machine Learning Algorithms, Edmund F. Agyemang

School of Mathematical & Statistical Sciences Faculty Publications

This study aims to model the reduction in the Tinnitus Functional Index (TFI) utilizing supervised machine learning algorithms, focusing primarily on Ordinary Least Squares (OLS), K-Nearest Neighbor (KNN), Ridge, and Lasso regressions. Our analysis highlighted Group, ISI, and SWLS as significant predictors of TFI reduction, identified through the best subset selection and confirmed by both forward and backward selection criteria in the OLS regression. Notably, the shrinkage methods, Ridge and Lasso regressions, demonstrated superior performance compared to OLS and KNN, with the Ridge regression presenting the smallest test mean square error (MSE) of 318.30. This finding establishes the Ridge regression …

On The Lagrange And Hermite Quadrature Formula, Shuxia Li, Yonghong Chen

School of Mathematical & Statistical Sciences Faculty Publications

This paper builds on the error analysis method for Newton-Cotes quadrature formulas developed by D. R. Hayes and L. Rubin in 1970, which utilizes Lagrange interpolation polynomials. By adopting and extending their approach, this work derives the error estimate for Hermite interpolation quadrature. Specifically, we construct a polynomial P(x) analogous to the scaling function A(x) used by Hayes and Rubin, and prove its non-negativity over the interval. This allows us to establish a precise error formula for Hermite interpolation quadrature. The results provide a novel application of Hayes and Rubin's methodology, offering new insights …

Predictors Of Mystical Experiences In The Electronic Dance Music Scene, Cody Edward Lesniak

All-Inclusive List of Electronic Theses and Dissertations

The present study examined the nature and frequency of reported mystical experiences within the Electronic Dance Music (EDM) scene and the roles psychedelic and psychedelic-like substances, set, and setting play in facilitating these experiences. Participants were recruited using posts on a variety of EDM-related Facebook groups (EDM, EDM Universal, EDM Festivals and Raves, etc.) and Reddit threads (bonaroo, electricdaisycarnival, RavesAndRavers, etc.). Participants completed a self-report survey consisting of questions pertaining to their involvement in the EDM scene, motives for attendance at EDM events, motives for drug use, importance of the values of peace, love, unity, and respect (PLUR), the proportion …

Jürgen Habermas Revisited Via Tim Cook's Wikipedia Biography: A Hermeneutic Approach To Critical Information Systems Research, Reilly Smethurst, Amber G. Young, Arial D. Wigdor

Information Systems Faculty Publications and Presentations

Critical Information Systems (IS) research is sometimes appreciated for the shades of gray it adds to sunny portraits of technology's emancipatory potential. In this article, we revisit a theory about Wikipedia’s putative freedom from the authority of corporate media's editors and authors. We present the curious example of Tim Cook's Wikipedia biography and its history of crowd-sourced editorial decisions, published on Wikipedia's talk pages. We use a hermeneutic method to subject the theory about Wikipedia's “rational discourse” and “emancipatory potential” to a soft, empirical test. When we examined Cook's Wikipedia biography and its editorial decisions, what we found pertained to …

United We Stand, Divided We Fall: An Autogenic Perspective On Empowering Cybersecurity In Organizations, Alexandra Durcikova, Shayla M. Miranda, Matthew L. Jensen, Ryan T. Wright

Information Systems Faculty Publications and Presentations

Cybersecurity groups navigate complex, challenging environments in their mission to protect their organizations. They experience uncertainty from adaptive threats from external attackers and unpredictable stakeholders. Under such volatility, business groups operate best when they are psychologically empowered. Recognizing the potential for empowerment to reduce organizational risk, we sought to learn how cybersecurity groups come to be (dis)empowered and how this (dis)empowerment is sustained. Instead of the conventional view of the empowerment process as designed, we advance an emergent view of the empowerment process. We abductively surface this process from our case analyses of 15 U.S. organizations. We offer three insights: …

Enhancing Student Learning Of The Physics Of The Human Eye In The Context Of Computer Vision Syndrome During Covid-19, Liang Zeng, Guang Zeng

Physics & Astronomy Faculty Publications

No abstract provided.

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 …

Fast Neutron & Gamma-Ray Scintillation And Broadband Photoluminescence From Gallium Nitride & Gallium Oxide: Developing Radiation-Hard Diagnostic Platforms, Daniel Jesus Valdes

UNLV Theses, Dissertations, Professional Papers, and Capstones

Integrated scintillation and electronics processing materials are of critical importance in environments exposed to high levels of radiation, such as nuclear fusion diagnostics and space missions. This dissertation focuses on the radiation detection capabilities of gallium oxide (Ga2O3) and gallium nitride (GaN), exploring their responses to fast neutrons and gamma rays. Using high-energy neutron beam facilities at Los Alamos Neutron Science Center (LANSCE) Flight Path 4FP60R, we exposed both Ga2O3 and GaN crystals to neutron irradiation spanning an energy spectrum ranging from 1 to 400 MeV. A Pi-Max 4 fast-gated Intensified CCD (ICCD) camera captured the transient scintillation responses for …

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 …

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, …

Addressing Inference Time Of Machine Learning Models In Embedded Systems, Samuel Black

UNLV Theses, Dissertations, Professional Papers, and Capstones

Embedded Systems are used for a wide range of specialized computing purposes including surveyal, safety, security, and quality of life. Many areas that embedded systems are used in require the use of machine learning models. Constraints can be placed on embedded systems. Timeliness of execution, user satisfaction, security, power, and resource limitations must be considered when designing for embedded systems. Neural networks excel at complex tasks that are otherwise intractable, but their relatively high computational cost poses a challenge for inclusion in embedded systems. Neural network architectures should be optimized to reduce the total number of operations performed while maintaining …

Exploring The Interactive Effects Of Officer, Subject, And Encounter Factors On Police Use Of Force Outcomes, Jeremy David Barnum

UNLV Theses, Dissertations, Professional Papers, and Capstones

Police use of force incidents are highly complex events that can be characterized by factors pertaining to the officers, subjects, and immediate encounter. These factors and the dynamic interrelationships between them encompass the situational context of use of force and have been widely studied in the criminological literature (Bolger, 2015). However, extant research has almost exclusively focused on identifying the main effects of situational factors on use of force with little consideration of how effects may vary across specific situational contexts. This limits our understanding of police use of force and complicates efforts to develop policy or training that ensures …

Biological Reduction Of Mixed Oxyanions In Wastewater Brine, Katherine J. Earp

UNLV Theses, Dissertations, Professional Papers, and Capstones

Treatment of contaminated brine water is an area of active research spurred by the use of advanced treatment technologies, such as membrane separation, reverse osmosis, ion exchange, etc. for water reuse and recycling, which has become critical due to the impact of climate change on water resources throughout the globe. Biological reduction of harmful organic and inorganic pollutants in water has been demonstrated as an effective method for water and wastewater treatment and would be a potential technology for brine treatment. However, biodegradation of contaminants in high salinity waters is challenging because most microbial communities cannot survive brine environments. The …

Understanding Levels Of Perceived Racism And Discrimination When Utilizing Perinatal Care, Alexandria S. Evans

UNLV Theses, Dissertations, Professional Papers, and Capstones

Social and structural determinants of health, grounded in historical racism and discrimination, significantly influence maternal health outcomes. Because of this, communities of color experience a higher burden of maternal health disparities. In the last several decades, there has been an increased awareness of the need to integrate critical race theory into public health research to address maternal health disparities in the context of perinatal care delivery, policy, and funding decisions.

This three-manuscript dissertation utilized mixed methods to examine the ways in which systemic racism and discrimination are perceived and how it impacts the utilization of perinatal care services in historically …

Social Network Analysis: How Social Media Groups Can Influence Policies Among Hispanic Families, Valeria Gurr

UNLV Theses, Dissertations, Professional Papers, and Capstones

The COVID-19 pandemic in March 2020 impacted the entire world in various ways. On March 15, 2020, education in Nevada was significantly impacted when the Governor announced the closure of public schools due to the pandemic. When the schools were closed, students were forced to stay home and receive their education through virtual instruction. This transition to distance education affected the Hispanic/Latino(a) communities in pronounced ways and highlighted issues such as limited access to the Internet, technology, lack of hardware devices, as well as language barriers and more. This study uses social networking analysis techniques to examine the nature of …

Uptake Of Contaminants Of Emerging Concerns (Cecs) By Plants Irrigated With Recycled Waters, Abid Hussain

UNLV Theses, Dissertations, Professional Papers, and Capstones

The increasing demand for water in arid and semi-arid regions necessitates the use of recycled water (RW) for irrigation. RW is a viable alternative to conventional irrigation water at most locations, but it can be a major route for contaminants of emerging concerns (CECs) to be taken up by the tissues of food crops, thereby leading to their subsequent entry into the food chain. CECs include pharmaceuticals, personal care products, and industrial chemicals that are generally present at low concentrations in environmental waters, hence their common designation as trace organic compounds (TOrCs), and CECs also include microbiological constituents such as …

Development Of Uranium Fluoride Microstructures, Harry Jang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Uranium microstructured materials with controlled size and shape have found applications in several branches of the nuclear industry including as targets for medical isotopes production, fuels for nuclear reactors, standards for analytical measurements, and energy sources for space exploration. Morphological studies of actinide materials are also highly relevant to nuclear forensics-related work. Other potential applications include information storage, catalysis, sensors, and luminescent devices. Most studies on uranium microstructured materials have focused on binary oxides, nitrides, carbides, and fluorides, with the spherical shape being the dominant morphology. Prior to the work reported in this dissertation, aside from UF4 microspheres (ms) and …

Physiology And Genomics At The Bottom Of The World: Genome To Phenome, Amy Christine Klink

UNLV Theses, Dissertations, Professional Papers, and Capstones

Mammals are exposed to a suite of physiological challenges based on the environment in which they inhabit. Animal individuals can overcome challenges associated with the dynamic nature of their habitat through variation in phenotypic traits. The plasticity of a phenotype relies on an individual’s genome and the transcription factors that act on regulatory elements. Species living in Antarctica display physiological specializations to withstand harsh conditions, such as severe cold temperatures, shifts in available ice habitat, and annual fluctuations in daylight. To explore the connections between an individual’s genome and its phenotype, we investigated two physiologies of the Antarctic Weddell seal …

Exploring Staff Nurses’ Perceptions Of Nursing Student Enculturation Within Clinical Teaching: A Focused Ethnography, Larizza Limjuco Woodruff

UNLV Theses, Dissertations, Professional Papers, and Capstones

The traditional clinical education model in nursing has utilized on-site learning experiences in clinical settings with patient encounters. With the growing complexity and demands of contemporary nursing care today, it is imperative to question the principal assumptions that guide the design and use of traditional clinical teaching experiences. Staff nurses working with nursing students can illuminate the impact of sociocultural workplace factors on clinical teaching and learning when preparing students for practice. Yet there is little known about staff nurses’ perspectives of nursing culture and how enculturation prepares nursing students for the profession. By understanding the perceptions of enculturation among …

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 …

Investigation Ionic Polymer Metal Composite Capacitors Through Fabrication, Experimentation, And Modeling, Liya S. Napollion

UNLV Theses, Dissertations, Professional Papers, and Capstones

The increasing demand for greater energy storage capacity alongside the need to minimize the size of various devices, such as hybrid electric vehicles, medical devices, and pulsed power systems—has highlighted the necessity for advanced polymer film capacitors with high energy density. While traditional batteries and electronic devices have generally sufficed for many applications, their inherent size limitations hinder their ability to deliver the high levels of peak power required for certain demanding applications. This shortfall highlights the critical ongoing challenge within the energy storage sector to improve technology and more effectively meet these growing power requirements. Flexible Ionic Polymer Metal …

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 …