Digital Commons Network^™

Halophilic Genes That Impact Plant Growth In Saline Soils, Mckay A. Meinzer

Theses and Dissertations

Many plants are highly sensitive to salt in the soil, and their growth and yield can be greatly hindered by as little as less than 1% salt concentration in the soil. Additionally, soil salinity is a growing issue globally and affects significant areas in Utah. Halophytes are plants that are adapted to grow in saline soils and have been widely studied for their physiological and molecular characteristics, but little is known about their associated microbiomes. Bacteria were isolated from the rhizosphere and as root endophytes of Salicornia rubra, Sarcocornia utahensis, and Allenrolfea occidentalis, three native Utah halophytes. Several strains of …

O Silêncio Da Mulher Carioca Oitocentista E Sua Representação No Romance Naturalista Lar De Pardal Mallet, Jessyca Kimberly De Oliveira Zanetti

Theses and Dissertations

The 19th century represents the arrival of the Portuguese royal family in Brazil and, with it, significant changes in society and the local population. A formerly reclusive member of society begins to take shape not only in public life but also within the literature: the Brazilian woman. Despite her changing social role, prevailing hygienist and medical theories of the time pointed to the lack of vocation of the nineteenth-century woman for rational matters; which in naturalism implies that these pseudo-scientific theories would be the base to dissect and explain the social pathologies of Rio de Janeiro, Brazil, and society at …

Characterizing The Informativity Of Level Ii Book Data For High Frequency Trading, Logan B. Nielsen

Theses and Dissertations

High Frequency Trading (HFT) algorithms are automated feedback systems interacting with markets to maximize returns on investments. These systems have the potential to read different resolutions of market information at any given time, where Level I information is the minimal information about an equity--essentially its price--and Level II information is the full order book at that time for that equity. This paper presents a study of using Recurrent Neural Network (RNN) models to predict the spread of the DOW Industrial 30 index traded on NASDAQ, using Level I and Level II data as inputs. The results show that Level II …

A Deep Learning Approach To Extractive Text Summarization Using Knowledge Graph And Language Model, Yichen Gao

Theses and Dissertations

Extractive summarization has been widely studied, but the summaries generated by most current extractive summarization works usually disregard the article structure of the source document. Furthermore, the produced summaries are sometimes not representative sentences in the article. In this thesis, we propose an extractive summarization algorithm with knowledge graph enhancement that leverages both the source document and a knowledge graph to predict the most representative sentences for the summary. The aid of knowledge graphs enables deep learning models with pre-trained language models to focus on article structure information in the process of generating extractive summaries. Our proposed method has an …

Utilizing Isothermal Titration Calorimetry To Measure Β-Galactosidase Activity In Dairy Products, Tyler Ronald Jarrard

Theses and Dissertations

The dairy industry uses enzymes to make cheese, alter product flavor, and eliminate lactose. The activities of these enzymes have been measured in clear buffered solutions, but because of the limitations of spectrophotometric methods, enzyme activities have not been measured in opaque or colored dairy products where they are used. Isothermal titration calorimetry (ITC) can be used to determine reaction kinetics in opaque and colored solutions by measuring the heat rate from enzyme-catalyzed reactions as a function of time. This study used ITC to measure β-galactosidase activity in opaque solutions of milk, sweet whey, sweet whey permeate, acid whey, and …

Network Representation Theory In Materials Science And Global Value Chain Analysis, Mats C. Haneberg

Theses and Dissertations

This thesis is divided into two distinct chapters. In the first chapter, we apply network representation learning to the field of materials science in order to predict aluminum grain boundaries' properties and locate the most influential atoms and subgraphs within each grain boundary. We create fixed-length representations of the aluminum grain boundaries that successfully capture grain boundary structure and allow us to accurately predict grain boundary energy. We do this through two distinct methods. The first method we use is a graph convolutional neural network, a semi-supervised deep learning algorithm, and the second method is graph2vec, an unsupervised representation learning …

The Topology And Dynamics Of Surface Diffeomorphisms And Solenoid Embeddings, Xueming Hui

Theses and Dissertations

We study two topics on surface diffeomorphisms, their mapping classes and dynamics. For the mapping classes of a punctured disc, we study the $\ZxZ$ subgroups of the fundamental groups of the corresponding mapping tori. An application is the proof of the fact that a satellite knot with braid pattern is prime. For the mapping classes of the disc minus a Cantor set, we study a special type of reducible mapping class. This has direct application on the embeddings of solenoids in $\mathbb{S}^3$. We also give some examples of other types of mapping classes of the disc minus a Cantor set. …

Development And Validation Of A Spanish Nutrition Screening Tool For Hispanic American 3 To 5-Year-Olds, Denisse Arias Olivas

Theses and Dissertations

Latinos comprise 18.9% of the population in the United States and are the largest and fastest growing minority group. Obesity prevalence was 26.2% among Hispanic children compared to 16.6% among non-Hispanic White children. The obesity epidemic among Latino children has been growing rapidly over the past three decades. Multiple barriers, such as lack of culturally appropriate screening tools, language, and lack of access to nutritional assessment and expert consultation, prevents screening of Latino children and further nutritional guidance. For this reason, prevention efforts such as the use of nutritional screening tools is required for early intervention, more so with populations …

Mental Health Service Preferences Among Illinois Dairy Producers: A Best-Worst Scaling Approach, Brianna Messman

Theses and Dissertations

Importance of mental health within the agricultural community is growing, especially amongst dairy farmers. With the ongoing trend of negative economic returns facing the dairy industry, there is no better time to address mental health concerns of dairy producers. The goal of this study is to gain insight into the preferred services for mental health assistance amongst Illinois dairy producers. A questionnaire was administered to Illinois dairy producers and analyzed to acquire a greater understanding of this topic. The findings from this study have the potential to assist policy makers and benefit agricultural producers. An overwhelming preference among Illinois dairy …

Language Modeling Using Image Representations Of Natural Language, Seong Eun Cho

Theses and Dissertations

This thesis presents training of an end-to-end autoencoder model using the transformer, with an encoder that can encode sentences into fixed-length latent vectors and a decoder that can reconstruct the sentences using image representations. Encoding and decoding sentences to and from these image representations are central to the model design. This method allows new sentences to be generated by traversing the Euclidean space, which makes vector arithmetic possible using sentences. Machines excel in dealing with concrete numbers and calculations, but do not possess an innate infrastructure designed to help them understand abstract concepts like natural language. In order for a …

Real-Time Imaging And Measurement Of Compartmentalized Redox Shifts Using Novel Redox-Sensitive Biosensors: Implications In Developmental Toxicology, Brandon Mitchell Davies

Theses and Dissertations

Glutathione (GSH) is a small antioxidant in the body and exists in large quantities compared to other antioxidants. The GSH redox state (Eh) helps developmental processes, however, when the GSH Eh is disrupted, cells may undergo significantly poor developmental pathways, possibly leading to long-lasting damages. Similarly, NADPH and Thioredoxin redox states can have a major impact on cellular function, viability, and response to both endogenous and exogenous toxicants. Subcellular, compartmentalized redox environments during normal or perturbed situations, specifically in the cytosol, mitochondria, and nucleus, are not well understood. Here, using the P19 neurogenesis model of cellular differentiation, the kinetics of …

A Comparison Of The Vascular Response To Acute Sauna Heating In Young And Middle-Aged Adults, Olivia Kathryn Leach

Theses and Dissertations

BACKGROUND: Age-related declines in endothelial function have been well documented with larger declines observed in middle-aged. Passive heat exposure has been shown to be a promising method to improve vascular endothelial health, with sauna specifically being linked to reduced risk of cardiovascular disease. Increases in blood flow and shear rates associated with heat exposure are often considered to have a major influence on the observed improved endothelial function following heat exposure. The magnitude of these changes in response to sauna have not yet been defined. Therefore, the purpose of this study is to quantify and compare the vascular response to …

Large-Scale Testing Of Lightweight Cellular Concrete Backfill For Sliver-Fill Mse Wall Configurations, Meghann Dee Morgan

Theses and Dissertations

Lightweight cellular concrete (LCC) is an aerated or foamed concrete where 25-80% of the concrete matrix consists of air voids. The high volume of air voids reduces the strength but significantly decreases the weight of the material, which has made it an attractive alternative to soil for retaining structure backfills. Though the use of LCC has increased, little research has been performed on the large-scale behavior of retaining structures containing LCC as backfill. This research test attempts to fill knowledge gaps found with regard to the use of LCC in a mechanically stabilized earth (MSE) wall with a trapezoidal or …

Let’S Talk About Sex ( Work ), Baby: Women College Students And Their Experiences Producing Online Sex Work, Courtney Lynn Ebersole

Theses and Dissertations

Young college-age women have increasingly been using online sex work as a popular avenue to raise capital. I explored the experiences of women undergraduate students who engage in self-produced sex work online. In particular, this study examines the experiences of college women who turned to the online platform, OnlyFans, a mainstream adult entertainment platform that has allowed many college women to earn an income and fund their university costs, especially during the ongoing COVID-19 pandemic, by posting explicit pictures and videos onto the OnlyFans platform. This study identifies interpretative narratives used by undergraduate women in the U.S. to make sense …

Decolonizing Assessment: Witnessing, Disrupting, And Reimagining Assessment In Rhetoric, Composition, And Technical Communication, Lisa Schuler Dooley

Theses and Dissertations

This dissertation is concerned with the context in which assessments are conceptualized and designed, with the implications of assessment for its participants and their communities, and with the institution of assessment—its claims, its values and practices, its relationships to power. With this in mind, in this project I will propose decolonization as a framework through which to: 1) recognize, witness, and address the complicit nature of assessment practices in maintaining “normal;” 2) disrupt and redress the slow violences of assessment in rhetoric, composition, and technical communication studies; 3) reimagine assessment through decolonial methodology, research methods, and assessment pedagogy with the …

Pausing In American English: Documenting Native English Speakers' Pausing Patterns, Ammon Hunt

Theses and Dissertations

The purpose of this study was to examine more deeply the relationship between pause location and duration and its connection to clause and phrase boundaries for native English speakers (NESs). Previous research has shown pauses produced by NESs to be located at clause boundaries (Brown & Miron, 1971; Hawkins, 1971; Tavakoli, 2011), but little empirical work has been done to probe this issue further. For this research, 80 speech samples, 40 male and 40 female, were randomly selected from the International Dialects of English Archive (IDEA) representing different regions in the United States. Oral data from the read-aloud portion of …

The Impact Of Speech Pause On The Perceived Effectiveness And Likability Of A Speaker's Communication, Rebecca Lyman

Theses and Dissertations

The purpose of this study was to examine how length and location of speech pausing affects a listeners' perception of likability and communication effectiveness. Furthermore, the end goal of this study is to understand how to better assess atypical speech pause for persons with aphasia (PWA). Speech samples were collected from two neurotypical speakers over the age of 75. The speech samples were the recorded responses of picture description tasks found in the Western Aphasia Battery (WAB) and the Boston Diagnostic Aphasia Examination (BDAE). These speech samples were then modified to include artificial pauses located both within sentence and between …

More Than A Framework: Adopting An Equity Mindset Action Steps For School Leaders To Enact Change, Michelle Y. Hassan

Theses and Dissertations

To secure the economic well-being of our country in the current global society, we must be concerned with all students, and all means all. This qualitative research study asserts the need to stop focusing on the achievement gap and work to close opportunity gaps through equitable school practices. This narrative inquiry study critically analyzed equity frameworks and sought to understand how equity directors translate theory into praxis. Their counternarratives shared their approach to praxis during their journey. This study used Critical Race Theory (CRT) and CRT in Education theoretical frameworks to examine the equity directors' experiences. Their stories provided wisdom …

Investigating How Generation 1.5 Students Notice And Understand Direct Written Corrective Feedback (Wcf), Melissa Bustamante

Theses and Dissertations

The following research focuses on an underrepresented and understudied population in academia, Generation 1.5. Generation 1.5 encompasses a group of individuals who neither fit the categories of first-generation nor second-generation students and often feel caught between two cultures, the American culture and their family’s native culture (Serventy and Allen 1; Goldschmidt and Miller 11). These individuals are neither fully proficient in their L1 or L2 and consequently, share characteristics of L1 and traditional L2 writers (Singhal 2; Ferris 311). This research study examines how university Generation 1.5 students notice and understand direct Written Corrective Feedback (WCF) on treatable and untreatable …

The Film Score Music Of John Williams: A Guide To Selected Works For The Principal Percussionist, Andrew Charles Crozier Patzig

Theses and Dissertations

John Williams is an American composer, conductor, and pianist. As one of the most well-known, awarded, and financially successful composers in US history, Williams has scored some of the most iconic films of all time. Of note, he has scored more than one hundred films, many of which were directed by Steven Spielberg.

This study explores Williams’ writing for pitched and non-pitched percussion, particularly in his scores for E.T the Extra-Terrestrial, Star Wars, Indiana Jones, Hook, The Cowboys Overture, and Harry Potter and the Sorcerer’s Stone.

John Williams’ film music is often scored for an extensive inventory of percussion …

An Investigative Analysis Of Fernando Sor’S Introduction And Variations On “O Cara Armonia” From Mozart’S The Magic Flute, Luke James Nolan

Theses and Dissertations

Fernando Sor provides directions for fingering his Introduction and Variations on “O Cara Armonia” in the specific beaming and notation of the work. Although there are numerous publications of Sor’s Op. 9, most fail to provide elegant fingerings for his difficult passages. In these editions, the editor either failed to understand Sor’s intentions rendered in the notation, or disregarded Sor’s technical practices in favor of modern technical practices. Both avenues will lead to a disastrous reproduction of the work. While the piece may offer a challenge for the guitarist, the technical difficulties of Sor’s Op. 9 should not be readily …

Identifying Attributions And Predictors Of High School Dropout In Rural Youth: A Mixed Methods Approach, Karla Swayngim Reed

Theses and Dissertations

Graduating high school is an important educational milestone that is related to better life outcomes; however, high school dropout remains an issue in the United States (US). This mixed methods study began with a qualitative stage using attribution theory to identify the factors rural youth perceive as responsible for their decision to drop out of high school. Focus groups were conducted with youth from a rural area in South Carolina (SC). Seven themes were identified across the two categories of Internal and External Focus. Internal Focus themes included: (a) ability/self-efficacy, (b) effort, (c) plans for the future, and (d) other …

Violence, Rebellion, And Compromise In Chinese Campus Cinema ----- The Comparison Of Cry Me A Sad River And Better Days, Chunyu Liu

Theses and Dissertations

This dissertation examines the social critiques in Chinese campus films by viewing their development and cultural context. Social Criticism, a prominent trend in Chinese cinema, addresses a wide range of widely concerned social issues, including education, romance, marriage, politics, environmental concerns, psychological repressions, etc. It appears that a Chinese mainland woman filmmaker and a Hong Kong professional director echo each other on the same theme. They are inspired by similar genuine events and share many similarities in the way they orchestrate the relationships and backgrounds of the characters. However, the two films retain their different characteristics. This thesis will discuss …

Sites Of Peace And Pain: The Black Grandmother Figure In Toni Morrison’S Beloved, Jazz, And Sula, Alexus Joannea Ray

Theses and Dissertations

This thesis examines how Toni Morrison captures the genuine lived unique experiences of Black grandmothers and their granddaughters throughout her novels and specifically in Beloved, Jazz, and Sula. My analysis takes a closer look at the complications behind Morrison’s grandmothers in order to demonstrate that, while she is strong, supportive, and family oriented, the Black grandmother figure can also be a person of peril. The main characters, Denver, Violet, and Sula must come to terms with the contradictions of strength and sacrifice that the novels insist are better left in the past. Drawing on Morrison scholarship and Black women’s …

Neurodevelopmental And Transient Impacts Of Brain Kynurenic Acid Elevation And Sleep-Wake Behavior, Katherine Rentschler

Theses and Dissertations

Sleep is vital for healthy cognition and mood. Sleep dysregulation is implicated in psychiatric disorders such as schizophrenia and bipolar disorder. Sex differences in sleep and arousal dysregulation are prominent in patients with psychotic disorders. Elevated levels of the neuroactive tryptophan metabolite, kynurenic acid (KYNA), have been found in cerebrospinal fluid and postmortem brain tissue samples from patients with psychotic disorders. KYNA is an astrocyte derived antagonist at N-methyl-D-aspartate (NMDA) glutamate receptors and α7 nicotinic acetylcholine (α7nACh) receptors. KYNA is synthesized in the brain from its biological precursor, kynurenine, via the enzyme kynurenine aminotransferase II (KAT II), a potential therapeutic …

Muon Intensity Measurement With The Majorana Demonstrator, Franklin Michael Adams Jr.

Theses and Dissertations

The Majorana Demonstrator (MJD) is a shielded radiation detection system located a mile underground at the Sanford Underground Research Facility (SURF) in South Dakota. The system aims to detect the theorized, rare process of neutrinoless double-beta decay. The Demonstrator utilizes an array of scintillating acrylic detectors to veto any signals induced by earth-penetrating cosmogenic muons and reach background levels necessary for the detection of neutrinoless double-beta decay. Utilizing the data collected by the muon veto system, an analysis has been done to determine the differential muon intensity. The complex geometry of the interlacing detector panels requires the use of Monte …

Volume Change Measurements Of Cancer Cells In A Microfluidics Platform, Yukuan Yu

Theses and Dissertations

Understanding the function of aquaporins in transcellular transport is vital for homeostasis, pathophysiology, and translational potential in AQP-based diagnostics and therapeutics. Microfluidics device has the potential to evaluate the function of aquaporins with precise control and manipulate micro-scale fluid due to good optical quality and short processing distance. This work has two parts: cell culture in a microfluidic chip to characterize aquaporins’ function and visualization of single cell volume change under osmotic pressure shock in a homemade imaging dish. For the first part, we established a microfluidics platform for future modification and measurement of the dynamic volume change of biological …

Ideologies Of Race, Gender, And Religion In Pronunciation Perception At Evangelical Esl Programs, Ruthanne Joy Wenger Hughes

Theses and Dissertations

Nonnative English speakers are often judged based on their accent, but accent is perceived as well as produced. Race, gender, and religion interact to create complex and nuanced figures of personhood (Agha, 2005) impacting teachers' perceptions of students. Teachers' individual differences, including language proficiency, exposure to language, and previous training, also affect pronunciation ratings (e.g., Kang, 2008, 2012; Kang & Rubin, 2009). This dissertation investigated English as a second language teachers at evangelical English programs in South Carolina, addressing how teacher backgrounds interacted with institutionally circulating ideologies of race, gender, and religion, and these factors' impact on ratings of student …

Evaluation Of Preferential Vaporization Characteristics Of Isolated Single Droplet Combustion In A Converging Channel, Claire Elizabeth Dixon

Theses and Dissertations

Preferential vaporization of isolated single droplets was evaluated in this study. A previously verified lab-scale experiment using flow acceleration to counteract the effects of buoyancy in a converging channel with a decreasing cross section was utilized to investigate the single isolated droplet combustion. The previous experimentation revealed differences between results and values predicted by a one-dimensional numerical simulation. To investigate if the observed differences were the result of turbulent flow and the development of a boundary layer within the channel, a model was designed and analyzed in Ansys Fluent.

The developed Ansys simulation indicated that turbulent flow and growth of …

Advancing The Engineering Workforce By Enhancing Diversity, Equity, And Inclusion In The Engineering Classroom, Phoneia Hughes Myers

Theses and Dissertations

Society’s dependence on engineered products is steadily increasing. This dependence requires the engineering workforce to continually innovate and design new advancements. In pursuit of this, engineering employers are implementing diversity, equity, and inclusion initiatives to attract prime candidates and retain employees. For employers to achieve the goals of their initiatives, engineering colleges and universities must produce a diverse pool of graduates. The purpose of this thesis report is to investigate how the diversity, equity, and inclusion concept can be implemented into engineering education to assist with producing diverse graduating classes. A universal methodology is proposed to provide a roadmap on …