Digital Commons Network^™

Mechanical Property Simulations Of Ploybenzimidazole Membranes., Blake Alexander Clark

Electronic Theses and Dissertations

This work explores mechanical properties of membranes made of polybenzimidazole utilizing molecular simulations. These simulations researchers to narrow down polybenzimidazole membrane compositions to viable candidates. These simulations are quicker than current purely experimental methods. The increase in throughput would be achieved by eliminating compositions that have unfavorable mechanical properties through preliminary simulation work before moving onto experimental methods. Determining polybenzimidazole membranes’ mechanical properties experimentally would, therefore, allow for researchers to speed up research in areas such as fuel cells and electrolyzers that make use of polybenzimidazole membranes. This study uses Materials Studio and the COMPASS III forcefield to perform these …

Development, 3d Printing, And Sintering Of Aluminum-Magnesium Alloy Pastes For In-Space Manufacturing Applications, Fatou Ndiaye

Electronic Theses and Dissertations

This study explores the additive manufacturing process of paste printing, sintering, and de-binding for fabricating aluminum-magnesium alloy components. The paste formulation involved combining aluminum powder with varying magnesium concentrations, utilizing acrylic polyol, solvent, and plasticizer to create a homogeneous mixture. Printing parameters were optimized to ensure continuous pressure for improved extrusion. Sintering conditions involved incremental temperature increases with nitrogen flow to remove solvents. Density measurements, tensile tests, and shrinkage calculations were conducted to assess part quality post-sintering. The study revealed significant improvements in part quality with 5 wt.% magnesium incorporation within aluminum, although density and tensile strength fell short of …

Many Direct-To-Consumer Canine Genetic Tests Can Identify The Breed Of Purebred Dogs, Halie M. Rando, Kiley Graim, Greg Hampikian, Casey S. Greene

Computer Science: Faculty Publications

OBJECTIVE To compare pedigree documentation and genetic test results to evaluate whether user-provided photographs influence the breed ancestry predictions of direct-to-consumer (DTC) genetic tests for dogs.

ANIMALS 12 registered purebred pet dogs representing 12 different breeds. METHODS Each dog owner submitted 6 buccal swabs, 1 to each of 6 DTC genetic testing companies. Experimenters registered each sample per manufacturer instructions. For half of the dogs, the registration included a photograph of the DNA donor. For the other half of the dogs, photographs were swapped between dogs. DNA analysis and breed ancestry prediction were conducted by each company. The effect of …

Potential Consumer Response To The Healthy Symbol Proposed By The Us Food And Drug Administration, Jillian Hyink, Brandon R. Mcfadden, Brenna Ellison

Agricultural Economics and Agribusiness Faculty Publications and Presentations

The U.S. Food and Drug Administration (FDA) has proposed updates to the definition of “healthy,” including distinctions between types of sugar and fats and limits on added sugar, saturated fat, and sodium. To communicate the updated standards, the FDA is developing a Healthy symbol to display on food packages, which could reduce knowledge gaps by assisting U.S. consumers in meeting recommended nutritional guidelines. This study aimed to explore the potential for the label to increase consumers' ability to correctly identify a food product that met the FDA's criteria for a healthy symbol. To complete the study objective, 1018 adults were …

Understanding Practitioner’S Perceptions Of Speech And Language Therapy Services In The Juvenile Justice System, Julia Buendgen

Dissertations, Theses, and Projects

The purpose of this study was to gain more understanding of how individuals who work with the juvenile justice population understand language disorders and the scope of speech and language therapy services. In addition, this study explored potential supports for individuals working in this setting. This study consisted of twenty participants working in the juvenile justice system who completed a survey tool that was designed by the researcher to describe the participant's perceptions of speech-language pathology, current procedures, reported challenges, and potential areas in need of support. Participant knowledge of the scope of speech-language pathology varied among participants. The highest …

Introduction Of The Anatomy Academy Program To Children In A Rural Elementary School, Rox Aurelio, Madison Dobbs, Nicole Horn, Gianni Terrana

UNLV Theses, Dissertations, Professional Papers, and Capstones

Children in rural communities experience health and education disparities. Early exposure to health promoting habits can positively impact future health habits. Healthcare providers who grew up in rural areas are more likely to practice in rural areas. Doctor of physical therapy students and physical therapists implemented Anatomy Academy, a service-learning program aimed at promoting healthy living and introducing healthcare occupations, to elementary students in a rural area as this program had previously only been implemented in urban areas. The Biomedical Institutional Review Board at the University of Nevada, Las Vegas approved this study. A 40-minute lesson was delivered weekly for …

Implementation Of Evidence-Based Practices To Improve Treatment For Patients With Neck Pain: A Pilot Study, Kristine David, Sarah Kaderka, Christoffer-Judd Villarias

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: To determine physical therapists’ barriers to implementation and subsequent maintenance of evidence-based practices (EBPs) for treating neck pain from the American Physical Therapy Association (APTA) neck pain Clinical Practice Guideline (CPG) over the course of six months.

Materials and Methods: Participating physical therapists were trained on the EBPs of treating neck pain through a live 90-minute webinar followed by a hands-on, in-person 90-minute session. Clinics were supplied with all necessary equipment and reference guides. Assessment of participant maintenance to neck pain EBPs included data collection from a baseline Knowledge Check survey prior to educational sessions, an Implementation survey at …

Cost Benefit Analysis Of Anesthesia Providers Within Gastroenterology Outpatient Practices, Jennifer Buffum Brown

UNLV Theses, Dissertations, Professional Papers, and Capstones

Anesthesia delivery in ambulatory and office-based settings has seen significant growth in the last 25 years. The advances in effective short-acting anesthetic drugs, combined with the rise in demand for minimally invasive surgery, allows for an increase in the number of surgical procedures to be achieved outside the hospital setting. Ambulatory anesthesia promotes patient health by reducing recovery times. It also contributes to sustainability by lowering costs otherwise associated with overnight hospital stays. Patient preferences for minimally invasive outpatient surgery, and faster recovery times have spurred an increased demand for business relationships between modern medical practices and anesthesia providers. Certified …

Study Of Plan Of The Day Adaptive Radiation Therapy Validity, Zane W. Burnett

UNLV Theses, Dissertations, Professional Papers, and Capstones

Radiation therapy is the use of radiation sources or generators to treat patients. The most common usage is in the treatment of cancers. Adaptive radiation therapy (ART) is the use of either multiple radiation therapy plans or adjusting a radiation therapy plan for daily anatomical changes. Soft tissue in the lower abdomen and pelvis can be greatly displaced depending on a variety of factors, especially bladder and rectum fill. This paper focuses on the creation of multiple plans prior to treatment to have options each day. Depending on the alignment and anatomical changes, clinicians can choose which one is most …

Remote Detection Of Leaks In High Level Waste Storage Tanks, Hunter Frey

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this research was to characterize three devices potentially capable of remotely detecting signatures of a leak from high-level waste (HLW) storage tanks, specifically ones found at the Savannah River Site and the Hanford Site. The hazard HLW found within these tanks include ¹³⁷Cs, a gamma-ray emitter, and ⁹⁰Sr, an electron emitter leading to heat generation. These pose health risks to the personnel and maintenance problems and environmental safety issues if released to the environment. Additionally, pinpointing the location of a leak is a task that could lead to the mitigation of excess waste leaking from …

Regulation Of Embryonic Eye Regrowth In Xenopus Laevis, Dylan Guerin

UNLV Theses, Dissertations, Professional Papers, and Capstones

Regrowth of lost organs and tissues is an amazing ability that some animals possess. For regrowth to be considered full, the organism must regrow the organ or tissue to a state that is structurally and functionally similar to that which was lost. The ability of an organism to regrow lost or damaged tissue varies among animals, both in the mechanisms utilized to achieve regrowth, and in what body parts can be regrown. Potentially even closely related species can vary wildly in regenerative ability. Therefore, regenerative research can look to other tissues and organisms for direction in elucidating the mechanisms through …

Increasing Self-Efficacy With Menstrual Management For Young Adults Experiencing Homelessness Using The Inclusive “U N Me” Education Program, Edellene Ignacio

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of the study was to increase self-efficacy with the occupation of menstrual management in young adults experiencing homelessness using the "Understanding and Navigating Menstrual Experience" or "U N ME" program. The objectives of this study were a reported increase in self-efficacy with menstrual management, the development of the U N ME program, and to promote the spread of accurate information to other menstruators in the community.

This study was a convergent parallel mixed-method study rooted in a phenomenological approach. The intervention featured four weekly workshops featuring education, group discussion, and an activity to tie the topic of the …

Seated Athletes' Motivation For Participation In Wheelchair Sports: A Qualitative Study, Audrey Lynn Miller

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose for this phenomenological design qualitative analysis was to gain an understanding of the perspectives of seated athletes’ motivation for participation in adapted athletics and argues that there is a component of seating that affects motivation. Occupational therapists build client interventions using meaningful occupations. This study aimed to increase awareness of adapted athletics impact on occupational performance. There was a gap in the literature for qualitative research exploring the lens of adapted sports participation through the perspective of seated athletes. This study utilized one-time individual semi-structured interviews with five participants that currently participate on a wheelchair court sports team …

Cellular Mechanisms Of Embryonic Eye Regrowth In Xenopus Laevis, Randolph L. Grell

UNLV Theses, Dissertations, Professional Papers, and Capstones

The African Clawed Frog, Xenopus laevis, has been an indispensable model organism for over 100 years in the study of embryogenesis and development. In recent years, this vertebrate model has emerged as a robust tool for deciphering the cellular and molecular mechanisms underlying various modes of tissue, limb, and organ regeneration. In the context of eye repair, Xenopus offers a unique model, where the adult frog eye has limited regenerative capacity compared to its pre-metamorphic embryonic and tadpole forms, which exhibit a robust capacity for regrowth. Understanding the intricate molecular mechanisms that underlie this developmental shift in regrowth ability …

Organizational Attributes And Supervision Officer Role Orientations: What Factors Influence Supervision Officer Behaviors?, Makayla Butler

Boise State University Theses and Dissertations

While past research has suggested the importance of probation and parole officer (PPO) role orientations for impacting officer behavior and client outcomes, limited work has examined factors that influence how supervision officers approach their work. This study sought to contribute to this body of research by examining the influence of officer characteristics, attitudes towards their organization, and attitudes towards their clients on their professional role orientations and supervision behaviors. Using self-reported survey data collected from PPOs in a Midwest state (n = 50), this study examined how various individual and organizational-level factors impacted PPOs role orientations, and how those role …

Sex Differences In Tibial Compression During Load Carriage Running On Challenging Surfaces, Eric Brian Francis

Boise State University Theses and Dissertations

Introduction: Tibial stress fracture is a common and destructive musculoskeletal issue for military, particularly female, personnel. Common military tasks, such as walking and running with body borne load, reportedly lead to lower limb biomechanics that elevate tibial stress fracture risk. Yet, it is unknown if similar increases are evident when running with heavy load – particularly over varied terrain personnel commonly navigate during military exercises. Purpose: This study sought to quantify vertical ground reaction force (GRF) and tibial compression while participants ran with body borne load over challenging surfaces, and determined whether they differed between sexes. Hypothesis: Participants will exhibit …

Stabilization Of Layered Transition Metal Oxide Positive Electrodes At High Potential For Sodium Ion Batteries, Eric Gabriel

Boise State University Theses and Dissertations

As global demand for energy storage rises in response to the proliferation of electric vehicles and intermittent renewable energy sources, the resources associated with popular energy storage systems are increasingly strained. Lithium ion batteries (LIBs) rely heavily on elements with low abundance and unstable supply chains, while sodium ion batteries (SIBs) are a promising alternative technology based on abundant, globally available elements such as iron and sodium. However, the electrochemical performance of SIBs must be improved to enable their commercial viability. In the class of layered transition metal oxide (LTMOs) materials that are strong candidates as positive electrode materials for …

Inland Water’S Challenges In Ungauged International Basins: Identifying The Desiccation Drivers Of Endorheic Hamun Lakes, Arash Modaresi Rad

Boise State University Theses and Dissertations

Inland waters face unprecedented pressures from climatic and anthropogenic stresses, causing their recession and desiccation globally. Climate change is increasingly blamed for such environmental degradation, but in many regions, direct anthropogenic pressures compound, and sometimes supersede, climatic factors. This study examined a human-environmental system – the terminal Hamun Lakes on the Iran-Afghanistan border – that embodies amplified challenges of inland waters. Satellite and climatic data from 1984-2019 were fused, which documented that the Hamun Lakes lost 89% of their surface area between 1999 and 2001 (3,809 km² versus 410 km²), coincident with a basin-wide, multi-year meteorological drought. …

Comparison Of Properties And Fracture Patterns In Aged And Fresh Cortical Bone, Mckenna Roan

Boise State University Theses and Dissertations

Bone is a complex natural material that presents many challenges to researchers interested in characterizing its mechanical properties. There are different techniques, such as drying, embalming, and freezing, to preserve bones for engineering and scientific study. There are advantages and disadvantages to these techniques, and there have been limited studies comparing the effect of preservation techniques on the mechanical and fracture properties. In this research, aged and fresh bovine bone specimens are tested in compression while monitoring acoustic emissions (AE). Three main aspects of testing are investigated: the force-displacement curves, acoustic emission activity, and fracture patterns observed in X-ray computed …

Porcine Computational Modeling To Investigate Developmental Dysplasia Of The Hip, Chia-Yu Yu

Boise State University Theses and Dissertations

While it is well-established that early detection and initiation of treatment of developmental dysplasia of the hip is crucial to successful clinical outcome, research on mechanics of the hip joint during healthy and pathological hip development in infants has been limited. Quantification of mechanical behavior in both the healthy and dysplastic developing joints may provide insight into the causes of developmental dysplasia of the hip and facilitate innovation in treatment options. In this study, subject-specific three-dimensional finite element models of two pigs were developed: one healthy pig and one pig with induced dysplasia in the right hindlimb. The objectives of …

Thermal-Fluid And Optical Considerations In The Design Of Porous Cavity Receivers, Koda D. Boldt

Boise State University Theses and Dissertations

Concentrated solar power (CSP) is a versatile renewable energy source that cleanly provides thermal energy by means of concentrating solar irradiance. One form of CSP, central receiver systems (CRS), utilizes receivers that allow for a solid medium to act as a heat exchanger between the solar irradiance and an optically clear working fluid. This solid medium can take many forms. One such form that shows great potential in high temperature applications is a porous receiver made of a ceramic material. The porous media is subject to solar irradiance to heat its surface. Air is then pulled across the porous media …

Secure Multiparty Protocols On Blockchain With Fairness And Scalability, Joshua Holmes

Boise State University Theses and Dissertations

Secure multiparty computation is a major field of research in modern cryptography. It allows for the creation of a protocol that maintains the privacy of the inputs and ensures that violation of the protocol results in no undue benefit to the violator or detriment to an honest party. These protocols can be used in many fields. In this dissertation, we explore the application of the mechanisms of secure party computation in the context of peer-to-peer lending, fair exchange with cryptocurrencies, consensus, and electronic voting. In all these areas, honesty of execution and fairness in the outcome should be assured or …

Exploring The Effects Of Dopants On The Opto-Electrical Response Of Ge2Se3-Based Optically Gated Transistor (Ogt), Md Faisal Kabir

Boise State University Theses and Dissertations

In this work, the electrical and optical responses of chalcogenide glass (ChG) Ge₂Se₃-based optically gated transistors (OGTs) were investigated. The device can act as a selector for resistive memory devices and potentially enable the production of functional high-density resistive (and memristive) arrays.

The OGT was developed using a Ge₂Se₃-based material heterostructure and demonstrated to successfully gate a memristor with light. The light intensity provided a built-in compliance current, allowing multi-state programming. By varying the light intensity incident on Ge₂Se₃ material, a family of current-voltage (I-V) curves were measured that …

Best Practices For Offline Evaluation For Top-N Recommendation: Candidate Set Sampling And Statistical Inference, Ngozi Ihemelandu

Boise State University Theses and Dissertations

Evaluation of recommender systems is key to ensuring that we are making progress by only promoting proposed algorithms that actually outperform the state-of-the-art. Evaluation can be performed offline using logged historic data, or online such as A/B tests. Offline evaluation is the most popular evaluation paradigm used in recent research publications because of its accessibility. It has been an area of study since its earliest days, and is still currently an active area of research. Even though significant work has been done to improve the process and metrics of offline evaluation, it still faces fundamental difficulties. Given the significant role …

Traffic Prediction In 5g Networks Using Machine Learning, Hossein Mehri

Boise State University Theses and Dissertations

The advent of 5G technology promises a paradigm shift in the realm of telecommunications, offering unprecedented speeds and connectivity. However, the efficient management of traffic in 5G networks remains a critical challenge. It is due to the dynamic and heterogeneous nature of network traffic, including bursty patterns, varying user behaviors, and diverse applications, all of which demand highly accurate and adaptable prediction models to optimize network resource allocation and management. This dissertation investigates the intricate domain of traffic prediction within 5G networks, addressing the specific challenges posed by both massive machine type communication (mMTC) networks and 5G cellular networks.

The …

Patterns Of Non-Consumptive Public Land Users: How Do Birders Value Species And Make Foraging Decisions, Rebecca (Bekki) Ann Waskovich

Boise State University Theses and Dissertations

Non-consumptive wildlife-associated recreation has grown by over 1000% since 1970. While the number of consumptive users has remained largely unchanged. Behavioral ecology and foraging theory can help to explain birder behavior to ascertain recreationists’ values and motives while on the landscape. During the Christmas Bird Counts of December 2022, 68 participants from Boise, Bruneau, and Nampa, Idaho counts were surveyed. A subset of those participants (29) volunteered to be interviewed further. Rarity and native species were found to be a top value for birders with 127 unique species with low encounter rates across all sites appeared in the top ranked …

Interpretation And Robustness Of Black-Box Ml Models For Secure Cyber Space, Qudrat E. Alahy Ratul

Boise State University Theses and Dissertations

The advent of sophisticated Machine Learning (ML) models has revolutionized the cybersecurity landscape, offering unprecedented capabilities to address complex challenges. Despite the ML model's capabilities, such models are still perceived as black boxes, the critical aspects of interpretability and robustness within these models often remain underexplored, rendering them susceptible to adversarial attacks and hindering their integration into sensitive applications. This dissertation focuses on interpretability and robustness of black-box ML models, aiming to fortify the cyberinfrastructure. Through a meticulous investigation of advanced techniques and methodologies, this work contributes towards elucidating and enhancing the interpretability and robustness of ML models in cybersecurity …

Wildfire Impacts On Soil: Hydrophobicity Inducement And Water Drop Penetration Test, Max A. Veneris

Boise State University Theses and Dissertations

The increasing prevalence of wildfires in today’s day and age has amplified the need for post-fire remediation and environmental restoration, especially in the wildland-urban interface (WUI). One of these impacts is soil hydrophobicity, or soil water repellency, which is a well-documented phenomenon after wildfires. Hydrophobicity can significantly impacting revegetation, slope stability, runoff, and erosion potential. To better understand the soil fire-induced hydrophobicity and its impact on other soil properties, variable levels of hydrophobicity need to be repeatably induced in several types of soils under different controlled testing conditions to measure other soil properties. To reach this goal two ingredients are …

Developing A Convolutional Neural Network (Cnn) Model For Facial Expression Recognition (Fer), Danrlei Martins, Leonardo Diesel

ICT

This Capstone Project focused on developing an accurate Facial Expression Recognition (FER) model by leveraging deep learning techniques, specifically Convolutional Neural Networks (CNNs). The objective was to explore, design, and implement custom architectures and evaluate their performance against existing work. The process involved several stages, such as data preprocessing, data augmentation, architecture design, hyperparameter tuning, and performance assessment using metrics like accuracy and F1-score while utilizing the FER-2013 dataset for training. The resulting FER model exhibited competitive accuracy levels and generalization capabilities, opening up opportunities for real-time implementation and application across various domains.

Using Predictive Analytics To Identify Risk Of Heart Disease Based On Lifestyle Factors And Health Metrics., Luiza Cavalcanti Albuquerque Brayner, Edgard Pacheco

ICT

In this project, we will report an innovative application, for the healthcare sector usage, which basically is a health tracking and disease prevention application. The application will enable users to log their daily meals, exercise routines, and lifestyle habits, providing a comprehensive overview of the user's health status. By making use of Machine Learning and data analytics, our solution offers a personalised and automated insight and predictive analytics, which empowers users to proactively manage their well-being.

Through a detailed data analysis, users will gain valuable insights of potential diseases development and risk. This report will explore the development process, implementation …