Digital Commons Network^™

Studying Acetylation Of Aconitase Isozymes By Genetic Code Expansion, Jessica Araujo

Graduate Theses and Dissertations

The tricarboxylic acid (TCA) cycle is a very important, centrally located, energy-producing pathway that connects numerous other metabolic and regulatory pathways. Enzymes of this cycle have been more recently implicated in various cancers and neurometabolic disorders, however, the exact mechanism by which this happens becomes quite complex when considering the potential modification of these enzymes and the presence of multiple forms of the enzymes and therefore there is much to be studied in this area.

Aconitase has become a recent enzyme of interest as its substrate, citrate, has been found to play a major role in many vital processes within …

Hallucinogenic Neoshamanism As Antimodernism: Development And Ethical Considerations, Ethan Thompson

Graduate Theses and Dissertations

Humans have been using hallucinogenic plants and fungi for thousands of years. Historically, people around the world have made use of these substances to aid in their spiritual development. Studies of the usage of hallucinogens in indigenous societies often use the term “shamanism” to characterize the associated system of belief and ritual practices. In popular understanding, shamanism is a religious system that features highly ritualized performances in which a practitioner (shaman) utilizes an altered state of consciousness to gain access to realms inhabited by spirits with the intent of recruiting their help to resolve a problem, cure a patient, correct …

The Effect Of Tier 2 Intervention On Student Achievement & Student Self-Efficacy, Cheyenne Morgan Hill

Graduate Theses and Dissertations

Biology is a key course in a student's learning path. It provides important information about the living world and creates foundational knowledge that will be used in other science courses as the student progresses through his or her secondary and post-secondary education. However, there is a pattern of low student achievement in this required science course. The inability for students to understand and retain the curriculum in turn leads to low self-efficacy. Together, this creates a poor attitude toward science and a reluctance to pursue further science courses and in turn science careers. Response to Intervention (RTI), a common educational …

The Sel Implementation Monkey: Identifying Factors That Serve As Barriers To The Successful Implementation Of Sel In The Classroom And School Setting, Aron Dody

Graduate Theses and Dissertations

The purpose of this study was to identify factors that served as barriers to the successful implementation of social and emotional learning in the classroom and school setting. This study utilized a reflective case study approach concerning USD 417’s social and emotional learning implementation journey.

The research questions for this study were: 1. What factors or conditions serve as barriers to the implementation of SEL in the classroom and school setting? 2. What resources or supports would lead to increased fidelity amongst teachers in the implementation of SEL in the classroom and school setting?

The reflections and data were used …

Ab Initio Studies Of Structure And Properties Of Group-Iv Monochalcogenide Monolayers, Shiva Prasad Poudel

Graduate Theses and Dissertations

The goal of this dissertation is to study the structure of ferroelectric group-IV monochalcogenide monolayers (MMLs) and their material properties. This work also established a new buckled honeycomb phase of these monolayers. Chapter 1 serves as an introduction where the motivation for these studies is established. In chapter 2, I used eight different exchange-correlation functionals (XC) to study the structure of these 2D ferroelectrics and found that their properties are independent of the choice of XC functionals. These findings reveal that the ground-state ferroelectric unit cell can be described by only five independent parameters, whereas their paraelectric (square or rectangular) …

Posterior Predictive Model Checking Of The Hierarchical Rater Model, Nnamdi Chika Ezike

Graduate Theses and Dissertations

Fitting wrongly specified models to observed data may lead to invalid inferences about the model parameters of interest. The current study investigated the performance of the posterior predictive model checking (PPMC) approach in detecting model-data misfit of the hierarchical rater model (HRM). The HRM is a rater-mediated model that incorporates components of the polytomous item response theory (IRT) model, such as the partial credit model (PCM) and generalized partial credit model (GPCM), at the second level of the hierarchy, to model examinees’ responses to performance assessments. To date, the HRM has not been rigorously evaluated using PPMC techniques. Monte Carlo …

To The Window, To The Wall: Improving Environmental Monitoring Protocols, Sarah Jones

Graduate Theses and Dissertations

Detecting microorganisms on environmental surfaces via an environmental monitoring (EM) program is part of a preventive food safety culture. Environmental monitoring should 1) verify that food safety plans are reducing cross-contamination risk from surfaces to food, 2) pinpoint microbial niches, and 3) prevent the transmission of pathogens. Environmental monitoring programs utilize EM tools, such as sponges, to sample food contact and non-food contact surfaces. However, EM tool selection is determined by the individual food firm. This dissertation evaluated and characterized factors influencing EM program effectiveness in the food industry. Specifically, this dissertation focuses on the release of microorganisms from EM …

Factors Contributing To Barriers To Equity In Gifted And Talented Identification, Adam Grant Lamparske

Graduate Theses and Dissertations

The purpose of this study was to examine the existing barriers to equity in the identification and servicing of gifted students in a small mid-western suburban school district. A mixed method approach guided by constructivist philosophy was used to conduct this research. An inductive Grounded Theory was the methodological approach. This study sought to gather the perception of school district stakeholders to identify potential barriers that exist for specific subgroups of students to being identified for gifted and talented services. The research questions for this Problem of Practice were as follows: (1) How do teachers and parents in School District …

Examination Of The Colorful Semantic Approach Via Telepractice For Children Who Are Deaf Or Hard Of Hearing, Samadhi Pusuba Devayalage

Graduate Theses and Dissertations

Introduction: Hearing loss, deafness or hard of hearing are considered to be the inabilityof perceiving sounds beyond 20 dB. Due to a direct impact of a hearing loss, a developing brain undergoes difficulties in acquiring age-appropriate syntax and speech sounds. As a result, children with hearing loss present language, speech, and literacy disabilities. The current study discusses the efficacy of the colorful semantics approach in order to see its impact on sentence structure development. Methodology: A single subject withdrawal experimental study conducted following ABAB model. Two participants (6 years and 10 years) were recruited to the study following an inclusion …

Robust And Fair Machine Learning Under Distribution Shift, Wei Du

Graduate Theses and Dissertations

Machine learning algorithms have been widely used in real world applications. The development of these techniques has brought huge benefits for many AI-related tasks, such as natural language processing, image classification, video analysis, and so forth. In traditional machine learning algorithms, we usually assume that the training data and test data are independently and identically distributed (iid), indicating that the model learned from the training data can be well applied to the test data with good prediction performance. However, this assumption is quite restrictive because the distribution shift can exist from the training data to the test data in many …

A Classical Delphi Study: Identifying The Essential Leadership Characteristics, Traits, And Skills Of Lutheran School Leaders, Alan Freeman

Graduate Theses and Dissertations

Principals play a key role in the success and sustainability of Lutheran Church Missouri Synod (LCMS) schools. This study examines the qualities, characteristics and traits possessed by successful Lutheran school leaders to provide a framework for developing current and future leaders of Lutheran schools. Today’s Lutheran school administrator must understand and be effective in financial planning, marketing, curriculum and instruction, community outreach and strategic planning in addition to the more traditional areas of curriculum and instruction, employee evaluation, and other school management tasks. Today’s successful Lutheran school administrator must be a leader and not just a manager. Thus, Lutheran schools …

The Impact Of Prosodic Reading Instruction On Adolescents’ Silent Reading Comprehension, Judy Lynn Fields

Graduate Theses and Dissertations

Research has established a strong relationship between silent reading comprehension and prosodic reading fluency among young readers, but much remains unknown about this relationship among older readers (Breen, Kaswer, Van Dyke, Krivokapic, & Landi, 2016; Cypert & Petro, 2019). The goal of this study was to determine the impact of prosodic reading instruction on adolescents’ silent reading comprehension. Conducted in a classroom setting in two different school districts, this study included three certified English teachers and a total of 52 students in grades 8, 9, and 10 for a period of nine to twelve weeks with a total of 810 …

Reactionism: The Motivation To Resurrect The Past, Derrick F. Till

Graduate Theses and Dissertations

Subtle long-term societal changes, whether political, economic, or cultural, can be perceived as threats to personal freedoms and cause reactance (Brehm, 1966). Instead of rationalizing and accepting changing societal dynamics, I assert that some people compensate by reframing the past in ways that legitimize and perpetuate the reactant anger: reactionism. Reactance theory is predicated on the perception that the barrier to freedom is not self-inflicted, thus people should not perceive responsibility for the loss of freedom (Brehm, 1966). Additionally, the perception of threat may be driven in part, or at least enhanced, by perceiving others as having access to restricted …

100 Million, Cade Scott

Graduate Theses and Dissertations

Alec, an 18-year-old filmmaker, decides to bunk with a group of TikTok stars in a mansion in the suburbs of LA in hopes of becoming as famous as them one day. But, he soon finds out that they plan to keep him behind the scenes. Forced to continue helping them film and post their videos, he starts witnessing shady events involving his step-brother, Kevin. The events reach a crescendo when some of the TikTok stars accidentally disappear. Alec investigates and discovers a sinister plot, and then he finds himself in a fight for his life. Which ends with him narrowly …

Using Thermal Units To Predict Biomass Accumulation And Total Nitrogen Uptake For Cover Crops In Arkansas, Mila Victório Pessotto

Graduate Theses and Dissertations

Including cover crops in agricultural production systems is an important management practice. Cover cropping can improve soil health, increase plant-available nitrogen (N), provide surface residue to prevent erosional soil loss, increase water infiltration, and increase weed suppression. Cover crops growth can be predicted using thermal days or growing degree days [GDD] similar to commodity crops such as corn (Zea mays L.) or rice (Oryza sativa). Growing degree day calculations are a well-known tool to predict crop growth stage or development stage and can be adapted for use in any plant species, including cover crops. Identifying and developing the relationship between …

Effects Of Cognitive Style On Food Perception And Eating Behavior, Thadeus Lyndon Beekman

Graduate Theses and Dissertations

Within the fields of psychology, notably cultural psychology, the analytic-holistic cognitive style theory has been introduced, developed, fine-tuned, and validated across a wide range of situations, stimuli, and populations. This research, combined with recent applications of the analytic-holistic theory, suggests that the differences in analytic or holistic tendencies of individuals in food, sensory, and consumer tests can impact food perception and associated behaviors. This dissertation aimed to investigate the impact of analytic-holistic cognitive styles of consumers in food situations. The first objective to accomplish this goal was to conduct exploratory research to identify if and where the analytic-holistic theory may …

Cyanobacterial Harmful Algal Blooms Vary Within And Across Years At Lake Fayetteville, Arkansas, Alyssa Ferri

Graduate Theses and Dissertations

The occurrence of cyanobacterial harmful algal blooms (HABs) and toxins are a nationwide concern. Although Lake Fayetteville likely experienced HABs for many years, microcystin, an algal toxin, was not monitored until 2019. The objectives of this study were to: 1) observe temporal variation in water quality and total microcystin concentrations, 2) quantify thresholds with microcystin and nutrients, algal parameters, and environmental factors, and 3) evaluate complex relationships between total microcystin and nutrient supplies, algal parameters, and environmental factors using a classification and regression tree model (CART). Three sites (dam, inlet, and mid) at Lake Fayetteville were sampled weekly to monthly …

Modeling Damage Spread, Assessment, And Recovery Of Critical Systems, Justin Burns

Graduate Theses and Dissertations

Critical infrastructure systems have recently become more vulnerable to attacks on their data systems through internet connectivity. If an attacker is successful in breaching a system’s defenses, it is imperative that operations are restored to the system as quickly as possible. This thesis focuses on damage assessment and recovery following an attack. A literature review is first conducted on work done in both database protection and critical infrastructure protection, then the thesis defines how damage affects the relationships between data and software. Then, the thesis proposes a model using a graph construction to show the cascading affects within a system …

Live Access Control Policy Error Detection Through Hardware, Bryce Mendenhall

Graduate Theses and Dissertations

Access Control (AC) is a widely used security measure designed to protect resources and infrastructure in an information system. The integrity of the AC policy is crucial to the protection of the system. Errors within an AC policy may cause many vulnerabilities such as information leaks, information loss, and malicious activities. Thus, such errors must be detected and promptly fixed. However, current AC error detection models do not allow for real-time error detection, nor do they provide the source of errors. This thesis presents a live error detection model called LogicDetect which utilizes emulated Boolean digital logic circuits to provide …

Breeding Soybean [Glycine Max (L) Merr.] Under Reduced Irrigation, Francia Seconde Ravelombola

Graduate Theses and Dissertations

Soybean [Glycine max (L) Merr.], a legume species native to East Asia in the Fabaceae family, ranks among the most important food crops in the world. It is widely grown and known for its high protein and oil concentration. Soybean is valuable because its seeds have multiple applications in food, feed, pharmaceutical, and industrial enterprises. Even though seed yield is the most important trait, breeders have recently given a significant attention to quality traits, such as high protein or modified oil concentration. Soybean seed protein inheritance has been extensively studied; however, genetics of high-protein ‘BARC-7’ soybean are still unknown.On the …

Toward Global Localization Of Unmanned Aircraft Systems Using Overhead Image Registration With Deep Learning Convolutional Neural Networks, Rachel Linck

Graduate Theses and Dissertations

Global localization, in which an unmanned aircraft system (UAS) estimates its unknown current location without access to its take-off location or other locational data from its flight path, is a challenging problem. This research brings together aspects from the remote sensing, geoinformatics, and machine learning disciplines by framing the global localization problem as a geospatial image registration problem in which overhead aerial and satellite imagery serve as a proxy for UAS imagery. A literature review is conducted covering the use of deep learning convolutional neural networks (DLCNN) with global localization and other related geospatial imagery applications. Differences between geospatial imagery …

The Experiences Of The Transgender And Gender Diverse Community On Coming Out At The University Of Arkansas, Taylor Hubbard

Graduate Theses and Dissertations

Researching the experiences of the TGD community can help better understand the unique struggles this community may face, specifically regarding the unique experiences southeastern United States TGD individuals have encountered. We draw on previous studies regarding the entire LGBTQ+ community and the minimal research on the TGD community. There is minimal research looking specifically at the experiences college TGD students have when coming out in different aspects and the perceptions TGD individuals have about themselves as a result of their experiences coming out. We conducted a survey with 37 respondents as well as 4 qualitative interviews. We present interviews conducted …

Diffusive Dynamics Of Biological Macromolecules In The Cytoplasm Of Live Bacteria, Asmaa Ali Sadoon

Graduate Theses and Dissertations

Bacteria are small organisms that play important roles in our bodies and in maintaining our surrounding environment. However, bacterial infections are considered as one of the health diseases that threatens the lives of humans. Resistance of bacteria to antibiotics has made treating bacterial infections more challenging. With the emergence of many developed optical techniques, it has become possible to study various biological mechanisms of molecules inside these small organisms with high resolution and precise localization. In this research, single particle tracking photoactivation localization microscopy (sptPALM) technique was used to investigate the dynamics of fluorescent histonelike nucleoid-structuring proteins (H-NS) in live …

An Engineering And Economic Analysis Of The Implementation Of The Carbo Rock-It, Lydia Huck

Graduate Theses and Dissertations

The patented Carbo Rock-It system was developed to carbonate beverages for the craft brewing industry with the goal of reducing time, cost, and environmental impacts of the carbonation process. This research field tests, models, analyzes and optimizes the engineering and economic performance of a commercial-scale Carbo Rock-It placed in production at an operating brewery (Core Brewing and Distilling Co., Springdale, AR). Field tests indicated that the Carbo Rock-It was able to successfully carbonate twelve 120 BBL batches of Scarlet Letter Seltzer to 3.0 vol/vol while meeting all beverage quality and safety requirements. The Carbo Rock-It was able to reduce carbonation …

Teaching Programmable Microcontrollers To Novice Users In A College Of Agriculture: Effects On Attitude, Self-Efficacy, And Knowledge, Grant T. Hood

Graduate Theses and Dissertations

This thesis consists of two articles that examined an instructional treatment based on the use of Arduino UNO R3 programmable microcontrollers in a fundamentals of agriculture systems technology course at the University of Arkansas. The first article examined students’ breadboarding and programming self-efficacy and knowledge of Arduino. The treatment consisted of a three-class-period instructional treatment, starting with a pretest before instruction to measure students’ baseline interest, knowledge, and self-efficacy of breadboarding and programming Arduino. This was followed with a short 30-minute instructional video explaining basic Arduino programming and breadboarding. Next a hands-on laboratory activity requiring students to breadboard and program …

Imagining Communicative Success: How Imagined Interactions Affect Conflict Management In Romantic Relationships, Melinda Shaw

Graduate Theses and Dissertations

Currently, there are no bodies of research that examine the relationship between imagined interactions, relational maintenance, conflict management, and gender identity. Previous research has primarily relied on quantitatively measuring the functionality of imagined interactions and generating an understanding as to why individuals use them. However, this study qualitatively examined the connection between these concepts, specifically how gender identity affects how individuals use imagined interactions to manage conflict with their partner and maintain their relationship. Fifteen participants who are currently in long-term relationships were interviewed and then required to complete the Thomas-Kilmann (1974) conflict management mode survey. Afterward, the responses were …

Children’S Social Judgments Of Others On The Basis Of Dialect-Specific Vocabulary, Madison Myers-Burg

Graduate Theses and Dissertations

Many studies suggest that young children prefer speakers who speak similarly to them. Children demonstrate social preferences for speakers of their own native language over speakers of a non-native language as well as for speakers of a familiar accent over speakers of an unfamiliar accent. Recent research suggests that young children will similarly show preference for speakers who use familiar dialect-specific vocabulary over speakers who use vocabulary specific to an unfamiliar dialect. The current study investigated potential motivations behind young children’s preferences for familiar dialect-specific vocabulary. Fifty participants ages fifty-one months to ninety-five months (Mage =72.6 months) viewed an animated …

Predicting The Likelihood And Scale Of Wildfires In California Using Meteorological And Vegetation Data, Matthew Walters

Graduate Theses and Dissertations

Wildfires have devastating ecological, environmental, economical, and public health impacts through the deterioration of water and air quality, CO2 emissions, property damage, and lung illnesses. The early detection and prevention of wildfires allow for the minimization of these risks. The use of Artificial Intelligence (AI) in wildfire detection and prediction has been highly researched as a tool to assist firefighters in stopping wildfires in its early stages. The three common wildfire prediction categories include image and video detection, behavior prediction, and susceptibility prediction. Data such as climate, weather, vegetation, satellite images, and historical wildfire data is most commonly used. Many …

“Young Adult Books Don’T Realize They Have That Power”: Reader Response To Ideology In Young Adult Dystopian Fiction, Zane Emīlija Sarma

Graduate Theses and Dissertations

The purpose of this research is to find out how readers interact with novels in the Young Adult dystopian genre. I will examine the ways in which readers resist the dominant patriarchal ideological discourses in the YA dystopian novel and how readers submit to this ideology. Through an interaction with the text, the reader produces oppositional, negotiated, or preferred meanings. I will argue that readers’ response to ideology in the YA dystopian novel is affected by their active participation in reader communities such as the Bookish community online.

YA dystopian fiction was highly popular in the early 2010s, but the …

Tooth Crown Morphology And Testosterone Transfer In Female Members Of Opposite-Sex Dizygotic Twin Pairs, Randall Feezell

Graduate Theses and Dissertations

The twin testosterone transfer (TTT) hypothesis posits that females gestated with male co-twins develop more masculine phenotypes due to in-utero androgen exposure. Research has shown co-gestational effects to be associated with increased deciduous and permanent tooth size in females belonging to opposite-sex dizygotic twin pairs (OSF) as compared with females belonging to same-sex monozygotic (MZF) and dizygotic (SSF) twin pairs and female siblings. This study evaluates whether the TTT hypothesis explains patterns of dental morphological variation, namely differences between OSF and other females (SSF, MZF, female siblings) in a contemporary sample that includes both deciduous and permanent data. This work …