Digital Commons Network^™

Identifying Optimal Stocking Strategies To Support Recovery Of An Endemic Lake Sucker, Dale R. Fonken

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Endemic fishes in the intermountain west experienced significant population declines in the 20th century due to a variety of disturbances, including habitat fragmentation, water development, and the introduction of non-native, predatory fish species. The combination of habitat degradation with increased predation risk can severely limit natural recruitment for native fish species, and in response, fisheries managers have employed a variety of recovery strategies to prevent extinction. Among the most prominent strategies is artificial propagation and subsequent release of individuals into the natural environment (i.e., stocking). Artificial propagation is an expensive endeavor, and when not coupled with a research component, can …

An Electroencephalographic Analysis Of Strategy Usage During Social Dilemmas, Nick Wan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The neuroscience of strategy usage during social dilemmas is said to require Theory of Mind (ToM). The process of ToM takes into consideration the actions of another person, so implications with strategies like tit-for-tat (TFT) or win-stay-lose-switch (WSLS) are logical. However, using either TFT or WSLS does not require ToM since these strategies are based on the previous opponent choice. Thus using a quantifiable strategy like TFT or WSLS during a social dilemma game may not necessarily incur activation of ToM. To investigate whether this is possible, 31 participants participated in the Prisoner’s Dilemma while being recorded via electroencephalography (EEG). …

Network-Wide Pedestrian And Bicycle Crash Analysis With Statistical And Machine Learning Models In Utah, Md Rafiur Rahman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Recent trends in crashes indicate a dramatic increase in both the number and share of pedestrian and bicyclist injuries and fatalities nationally and in many states. Crash frequency modeling was undertaken to identify crash prone characteristics of segments and non-signalized intersections and explore possible non-linear associations of explanatory variables with crashes. Crowdsourced “Strava” app data was used for bicycle volume, and pedestrian counts estimated from nearby signalized intersections were used as pedestrian volume. Multiple negative binomial models investigated crashes at different spatial scales to account for different levels of data availability and completeness. The models showed high traffic volume, steeper …

Global Change Effects On Carbon Cycling In Terrestrial Ecosystems, Guopeng Liang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since terrestrial ecosystems store approximately 3 times more carbon (C) than the atmosphere, they have a significant effect on the atmospheric CO₂ concentration. Although many studies have been conducted to determine global change effects on C cycling in terrestrial ecosystems, the underlying mechanisms remain uncertain. To address this knowledge gap, I utilized meta-analysis, laboratory experiments, and soil microbial community analysis.

In chapter 2, I conducted a meta-analysis to examine whether effects of long-term N addition on plant productivity can shift over time. I found that 44% of studies showed a marked trend (increase or decrease) in the strength of …

Applications Of Affinity Spaces In English Language Instruction: Writing And Peer Review Of Fanfiction Based On Video Games In An Academic English As A Second Language Writing Course, Marta Halaczkiewicz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This classroom-based research study explored applications of informal online spaces in formal language instruction. Using sociocultural theory as a lens, the present study examined how using creative writing genres and online feedback practices, may assist with alleviating the three pedagogical issues of academic writing instruction: rigidity of academic topics and forms, superficiality of in-class feedback process, and slow language development. Students in an intermediate English language course wrote weekly fiction inspired by their favorite video games. They also engaged in a scaffolded feedback process facilitated in an online space. At the end of the semester, they wrote a reflection on …

An Exploration Of Parent Management Training Programs And Their Cultural Relevance, Maria De La Caridad Alvarez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Behavioral parent training is a research-supported treatment for improving child behavior and increasing parenting skills. Despite many programs sharing a theoretical foundation and common elements, there is great variety in terms of treatment targets, populations served, treatment length, delivery setting, and expected outcomes. The purpose of this research was to first systematically organize and categorize relevant program information for the most frequently referenced Parent Management Training (PMT) programs. To this end, 19 programs were identified for review. We summarized each program and their available research evidence which ranged from 1 to 72 studies. The findings from this first project informed …

The Impact Of Covid-19 And Telehealth Services On Attrition Rates In Psychotherapy, Rylan B. Hellstern

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Clinicians in psychotherapy are constantly looking at their outcomes in order to identify and remove barriers that may inhibit effective treatment. Defined generally as the ending of a treatment prior to proper optimal benefit, attrition has been found to both hinder treatment efficacy and cost-effectiveness in therapy. While most attrition literature focuses on the contributing factors to such premature termination, little to no research is available that discusses potential resources for attrition rates. The COVID-19 pandemic has resulted in the use of telehealth services which may serve as a resource to combat attrition. The current study aims to identify how …

History Strikes Back! The Portrayal Of Greek And Roman History In Hollywood Films And How It Furthers The Discussion Of History, Ethan P. Frost

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In an article published in 2009, Robert Rosenstone expressed disappointment in two films he played a role in developing the Reds (1981) and the The Good Fight (1984). He expressed regret the films did not reach his expectations as a historian. As a result, he wondered whether there was a point in historians being involved in the making of historical films.

This thesis focused on six historical films set in ancient Greece and Rome. The six films are Alexander the Great (1956), The 300 Spartans (1962), and 300 (2006) for Greek history; and The Last Days of Pompeii (1935), The …

A Multi-Scalar Socio-Policy Analysis Of Resource Reallocation And Water Security In Twenty-First Century Utah, Usa, Clint P. Carney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As drought and a warming climate continue to impact the western United States, balancing the water needs of cities, agriculture, and natural systems is becoming increasingly more complex. One approach commonly promoted to address water supply issues is the transfer of water between users via markets. However, markets for water face multiple obstacles that can often be costly for participants due to constraints inherent in western U.S. water law. Coinciding with issues of cost, water markets must overcome disinterest among water rights holders in releasing their water rights for uses even if temporarily. Moreover, water transfers bring to light the …

Role Of Mitochondria In Postmortem Proteolysis And Meat Tenderness, David Son Dang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Among all eating quality characteristics in beef, tenderness is regarded as one of the most important traits. Previous research indicates that consumers are willing to pay a premium for beef guaranteed to be tender. Yet, tenderness is difficult to control and predict as it is influenced by a multitude of factors. Among these factors, meat aging has been shown to be a strong determinant of tenderness. Meat aging describes a process in which muscle tissue is broken down by other proteins within the muscle, resulting in a more tender product after cooking. Two well-recognized proteins that participate in the breakdown …

'I Try To Take The Whole Family Thing Out Of The Picture': How Professionals Navigate Motherhood Bias At Work, Rachael Gulbrandsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research aims to improve our understanding of professional mothers and the strategies they develop to navigate bias and sustain their careers. Previous research has shown that women with children face a motherhood bias that results in negative career outcomes such as reduced wages, fewer high-quality assignments, and decreased chances for promotion and leadership opportunities. This research investigates how professional mothers respond to that bias by analyzing interviews with forty-seven women in the field of law about their professional experiences: their experiences before and after having children; the challenges they face navigating their careers and families; and the strategies they’ve …

Shallow Composition And Structure Of The San Gabriel Fault, California In Drill Core And Geophysical Logs: Implications For Fault Slip And Energetics, Kaitlyn A. Crouch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Earthquakes are the sudden and intensive release of energy due to slip along faults. This energy may be felt on the Earth’s surface and may cause displacement of the Earth’s crust (seismic slip). As an earthquake ruptures, rocks in and around the fault are damaged and altered. When a fault displaces without earthquakes, it is referred to as aseismic creep. Faults may experience both seismic slip and aseismic creep throughout their cycles. In order to better model earthquake hazards and understand the cause of seismic slip versus aseismic creep in the shallow crust, we need to characterize the properties of …

Opportunities For Optimal Apple Production Management In Arid Conditions, Sam Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Apple trees are susceptible to biotic and abiotic stresses in the Intermountain West. The arid climate along with non-ideal soils make apple production challenging. Also, as high-quality agricultural land is developed, crop production gets pushed to land that often is saline. Apple trees grow poorly in saline soils. If apples are going to be grown in Utah, rootstocks must be identified that will tolerate saline soils. The USDA rootstock breeding program produced some rootstocks that may show salt tolerance. This project assessed the salt tolerance of these apple rootstocks in the greenhouse and in the field. Test rootstocks were compared …

Designing And Decoding Chemical Bonds: A Computational Pipeline Backed Up By Magnetic Criteria And Experiment, Nikita Fedik

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

You may find plenty of definitions of chemistry but all of them, explicitly or not, are centered around chemical bonds. When we say “chemical properties”, “reactivity”, “stability”, “structure” etc., we have in mind chemical bonds and their reorganization which almost completely defines the behavior of the matter. Why some materials are ultrahard and can cut through steel while others are so soft that you can form them with your bare hands? You probably have already guessed that it occurs because their chemical bonding is very different. Although the elemental composition could be the same! In this Dissertation, we report results …

Measuring Changes In Motivation In Response To An Online Repeated Reading Intervention With Self-Monitoring, David N. Longhurst

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Reading is a complex cognitive process that is integral to learning, achievement, and future life outcomes. Students with reading disabilities struggle to obtain information and develop specific interests. Unfortunately, many students in the United States do not meet expected reading benchmarks. Also due to the impact of the COVID-19 pandemic, has presented multiple challenges for student academic reading growth. Motivation beliefs, such as self-efficacy, interest, and goal-directed behavior, play an important role in students’ education and development. This study examined whether motivational constructs change throughout the course of an online repeated reading intervention with self-monitoring. Five elementary students were selected …

Let Us Live To Make Men Free: Locke And Aquinas On Toleration And Natural Law, Micah Safsten

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tolerance is a difficult and controversial concept in political rhetoric. For many, tolerance requires the acceptance of what one believes is evil. Still, most of us feel as though we must accept the differences of others on some level. This thesis is an attempt to better understand tolerance. To do so, it uses the concept of natural law, or the idea that all law should justified through one, universal theory of good. This would seem contradictory, as natural law supposes that a single vision of the good life exists for all. Yet the natural law theory of one legal theorist, …

An Intelligent Passive Islanding Detection And Classification Scheme For A Radial Distribution System, Mohannad Khaleel Subhi Suleiman

Theses

Distributed generation (DG) provides users with a dependable and cost-effective source of electricity. These are directly connected to the distribution system at customer load locations. Integration of DG units into an existing system has significantly high importance due to its innumerable advantages. The high penetration level of distributed generation (DG) provides vast techno-economic and environmental benefits, such as high reliability, reduced total system losses, efficiency, low capital cost, abundant in nature, and low carbon emissions. However, one of the most challenges in microgrids (MG) is the island mode operations of DGs. the effective detection of islanding and rapid DG disconnection …

Desalination Waste Revitalization Using Carbon Capture: Process Optimization Using Machine Learning, Ahmed Mohamed Elsayed

Theses

Over the next five to ten years, desalination will play an ever-important role in our society. Developing nations will look at desalination from the point of water scarcity, while developed nations will consider the perspective of the Water-Energy-Food nexus. With current technology, for every liter of freshwater produced, one and a half liters is thrown away as waste. This body of research proposes to employ chemical precipitation in ammoniated brine solutions, that have reasonably high ionic concentrations. CO2 absorption in Bubble Column Reactors can reduce sodium ions by precipitating NaHCO3. Also, the absorbed CO2 can reduce chloride ions and induce …

Fabrication And Characterization Of Germanium Telluride Nanowires, Shaikha Saeed Alketbi

Theses

Random access memories (RAMs) made from phase change materials (PCMs) are a promising alternative for flash memory technology currently dominating the memory market owing to its many appealing traits such as non-volatility, fast read/write performance, excellent scalability, and compatibility with complementary metal-oxide-semiconductor (CMOS) architectures. In fact, the scalability of PCMs is driving this class of materials to be the successor in the memory industry in the near future, and germanium telluride (GeTe) is one of the most viable PCMs in this context. In this study the phase change material GeTe nanowires, is fabricated using the vapor–liquid–solid (VLS) growth method. GeTe …

Bullied Because Of Their Teeth: Evidence From A Longitudinal Study On The Impact Of Oral Health On Bullying Victimization Among Australian Indigenous Children, Md Irteja Islam, Verity Chadwick, Tuguy Esgin, Alexandra Martiniuk

Research outputs 2022 to 2026

Making life better for Indigenous peoples is a global priority. Although bullying and oral health have always been a topic of concern, there is limited information regarding the impact of this problem on the general population, with no evidence in this regard among the Australian Indigenous population. Thus, we aimed to quantify the relationship between bullying victimization and oral health problems by remoteness among 766 Australian Indigenous children aged between 10–15-years using data from the LSIC study. Bivariate and multilevel mixed-effect logistic regression analyses were employed. Findings indicated children self-reported bullying more than parents reported their children were being bullied …

Design Of Wideband Decoupling Networks For Mimo Antennas Based On An N-Ary Optimization Algorithm, Min Li, Kwan Lawrence Yeung, Lijun Jiang, Ross Murch

Electrical and Computer Engineering Faculty Research & Creative Works

Techniques for reducing the coupling between antenna elements in multiple-input multiple-output (MIMO) systems are important for achieving the full potential of MIMO. In this article, a general and systematic method is developed to design a wideband decoupling and matching network (DMN) for MIMO antenna arrays. The DMN is formed by grid-like transmission lines interconnected by lumped components, whose reactance can be obtained from an N-ary optimization algorithm. Four design benchmarks are performed for validating decoupling methodology, elaborating on design/implementation procedure, and demonstrating superiority of the proposed method. Results show that the DMN achieves broad isolation bandwidth while occupying a small …

Techno-Economic Feasibility Analysis Of A Fully Mobile Radiation Oncology System Using Monte Carlo Simulation, Alex T. Price, Casey I. Canfield, Geoffrey D. Hugo, James A. Kavanaugh, Lauren E. Henke, Eric Laugeman, Pamela Samson, Clair Reynolds-Kueny, Elizabeth A. Cudney

Engineering Management and Systems Engineering Faculty Research & Creative Works

PURPOSEDisparities in radiation oncology (RO) can be attributed to geographic location, socioeconomic status, race, sex, and other societal factors. One potential solution is to implement a fully mobile (FM) RO system to bring radiotherapy to rural areas and reduce barriers to access. We use Monte Carlo simulation to quantify techno-economic feasibility with uncertainty, using two rural Missouri scenarios.METHODSRecently, a semimobile RO system has been developed by building an o-ring linear accelerator (linac) into a mobile coach that is used for temporary care, months at a time. Transitioning to a more FM-RO system, which changes location within a given day, presents …

A New Rock Hardness Classification System Based On Portable Dynamic Testing, Sasan Ghorbani, Seyed Hadi Hoseinie, Ebrahim Ghasemi, Taghi Sherizadeh, Christina Wanhainen

Mining Engineering Faculty Research & Creative Works

Hardness is one of the critical physical characteristics of minerals and rocks, which indicates the resistance of the rock to penetration, scratch, or permanent deformation. As a basic concept, rock hardness has a significant role in rock mechanics and geological engineering and is an appropriate diagnostic tool for the classification of minerals and rocks. The main purpose of this study is to guide rock engineers to measure the rock hardness faster, easier, and more accurately using Leeb's dynamic hardness test. Accordingly, this paper presents a new rock hardness classification system based on the Leeb dynamic and portable hardness testing method. …

In‐Plane Si Microneedles: Fabrication, Characterization, Modeling And Applications, Abdulla Al Mamun, Feng Zhao

Electrical and Computer Engineering Faculty Research & Creative Works

Microneedles are getting more and more attention in research and commercialization since their advancement in the 1990s due to the advantages over traditional hypodermic needles such as minimum invasiveness, low material and fabrication cost, and precise needle geometry control, etc. The design and fabrication of microneedles depend on various factors such as the type of materials used, fabrication planes and techniques, needle structures, etc. In the past years, in‐plane and out‐of‐plane microneedle technologies made by silicon (Si), polymer, metal, and other materials have been developed for numerous biomedical applications including drug delivery, sample collections, medical diagnostics, and bio‐sensing. Among these …

Preparation Of Concrete Specimen For Internal Sulfate Attack Analysis Using Electron Backscatter Diffraction, R. Sharon Uwanyuze, Lucas Enright, Jiyao Zhang, Stefan Schafföner

Materials Science and Engineering Faculty Research & Creative Works

Concrete cores were obtained from houses in eastern Connecticut, USA, that had varying degrees of crumbling foundations and wall cracking. Electron backscatter diffraction (EBSD) was used simultaneously with energy dispersive X-ray spectroscopy to investigate the degradation of these samples. This combination allowed the precise correlation of elemental composition with mineral crystallography phase mapping. EBSD examination showed the presence of pyrrhotite, pyrite, and marcasite phases in some of the samples, whereas internal sulfate attack (ISA) is triggered by the release of sulfates through the oxidation of such iron sulfides. Secondary expansion products from ISA are associated with foundation cracking, wall bulging, …

Study Of Gas Holdup Distribution In Cylindrical Split Airlift Reactor By Using Gamma-Ray Densitometry (Grd), Abbas J. Sultan, Laith S. Sabri, Hasan Shakir Majdi, Shadha K. Jebur, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

The local gas holdup details and behaviors in the cylindrical split airlift column by using an unconventional gamma-ray densitometry (GRD) measurement in non-invasive manner technique was investigated for the first time in this work for such kind of airlift column. With different gas velocities, 1, 2, and 3 cm/s, at three various axial planes (different levels) in z = 3, 60, and 110 cm were studied for local distribution in radial gas holdup profiles. The distribution in gas–liquid phases (air-water system) in the entire split reactor column, in the rising and descending sides, including their behavior in the upper and …

Process Evaluation And Kinetic Analysis Of 3d-Printed Monoliths Comprised Of Cao And Cr/H-Zsm-5 In Combined Co2 Capture-C2h6 Oxidative Dehydrogenation To C2h4, Khaled Baamran, Shane Lawson, Ali A. Rownaghi, Fateme Rezaei

Chemical and Biochemical Engineering Faculty Research & Creative Works

In this study, dual-function materials (DFMs) comprised of CaO and Cr/H-ZSM-5 were formulated in 3D-printed monolithic structures and investigated in a combined process for capture and utilization of CO₂ in oxidative dehydrogenation of C₂H₆ to C₂H₄ (CO₂-ODHE). Various formulation strategies were employed to fabricate these DFM structures. Two bed designs were considered: i) a layered-bed in which adsorbent (CaO) and catalyst were printed separately and stacked on top of each other, and ii) a single-layer bed where the adsorbent-catalyst materials were 3D-printed into a singular monolith and loaded into the bed …

Integration Of Dynamic Growth Modeling And Hydrodynamics In An Internal-Loop Split Photobioreactor, Laith S. Sabri, Aastha Ojha, Abbas J. Sultan, Muthanna H. Aldahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

In this study, new high-quality experimental data for culturing green microalgae Scenedesmus in tubular and cylindrical split airlift photobioreactors were obtained under different operating conditions. The obtained experimental data of culturing microalgae Scenedesmus in a tubular photobioreactor were used for determining the kinetic parameters of the photosynthetic reaction. On the other hand, the culturing of green microalgae in a split airlift photobioreactor was used to measure the microalgae cell trajectory using an advanced radioactive particle tracking (RPT) technique. The obtained results in terms of kinetic parameters of the photosynthetic reaction and microalgae cell trajectory were integrated for the first time …

Random Trilobe Packing Using Rigid Body Approach And Local Gas-Liquid Hydrodynamics Simulation Through Cfd With Experimental Validation, Binbin Qi, Sebastián Uribe, Omar Farid, Muthanna H. Al-Dahhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

It is quite difficult to measure the local information of the gas/liquid flow inside random packed extrudate catalyst beds in a large scale. Obtaining the local information through computational fluid dynamic (CFD) simulations in such system is also difficult due to the complexity of random particle packing and two-phase flow simulation. An efficient packing scheme was implemented to randomly pack 2917 trilobe particles (10 cm in height) in a 2-inch column to represent the trickle bed reactor (TBR) based on the rigid body approach. The generated geometry was used to define the computational domain for the two-phase hydrodynamics simulation based …

Hydration Of High-Alumina Calcium Aluminate Cements With Carbonate And Sulfate Additives, Jonathan Lapeyre, Sai Akshay Ponduru, Monday Uchenna Okoronkwo, Hongyan Ma, Aditya Kumar

Chemical and Biochemical Engineering Faculty Research & Creative Works

This study investigated the influence of limestone (LS) and calcium sulfate (C$) mineral additives on the hydration kinetics of high-α-Al₂O₃ calcium aluminate cement (CAC) utilizing experimental techniques and thermodynamic simulations. Increasing the replacement level of limestone or calcium sulfate increased the cumulative heat of the hydration reaction. The limestone exhibited limited acceleratory effects to the CAC hydration kinetics due to the coarseness of the powder. The coarse particle size distribution limited any heterogenous nucleation that would have occurred with a finer particle size as well as the intrinsic insolubility kinetically limits the formation of monocarboaluminate phases. Conversely, …