Digital Commons Network^™

Uhpc Incorporated With Non-Metallic/ Hybrid Fibers And Industrial Wastes - A Comprehensive Study On The Physical, Mechanical Properties And Performance, Sujitha Magdalene P

Theses and Dissertations

The demand for sustainable and high-performance construction materials has led to the exploration of alternative fine aggregates and fiber reinforcements for Ultra-High-Performance Concrete (UHPC). This study investigates the feasibility of using iron ore tailings (IOT), manufactured sand (MS), and copper slag (CS) as partial replacements for river sand (RS), along with various fiber reinforcements, to enhance mechanical properties, durability, and microstructural integrity in UHPC.

The results indicate that IOT at a 30% replacement level (IOT1) exhibited the highest 56-day compressive strength, outperforming MS and CS. Copper slag was found unsuitable for UHPC due to its lower long-term strength. While both …

Leading The Way: Preparing School Psychologists In Postsecondary Transition Training, Kaiya Joy Dawson

Theses and Dissertations

Students with disabilities face significant challenges in achieving postsecondary success, yet training on postsecondary transition planning within school psychology graduate programs remains limited. A content analysis of 252 accredited school psychology programs in the United States revealed major gaps in transition training, with only 1.6% of programs covering all critical domains. Results indicated that 67% of programs include some transition training in at least one domain. Family engagement (42%) and program structure (30%) had the most training, then interagency collaboration (20%), student focused planning (3%) and student development (6%). Notably, programs with larger cohort sizes were correlated with more transition …

Application Of Bioinformatic Tools To Tuberculosis Surveillance At The Arkansas Department Of Health, Brian Scott Delavan

Theses and Dissertations

Tuberculosis (TB) remains a public health threat in Arkansas. Great strides have been made over the past fifty years to reduce the number of TB cases in Arkansas. However, the rate of TB cases has remained steady since 2010. According to the Arkansas Department of Health, from 2012 through 2023 the TB Case rate per 100,00 population was between 2.0 and 3.1. To continue Arkansas’ drive towards elimination of TB in Arkansas, defined as one TB case per million residents, new data analysis tools are needed. This project employs multiple bioinformatic tools to analyze TB cases and latent tuberculosis infections …

Perceptions Of Faculty On Trauma-Informed Practices At The American University In Cairo, Marwa M. Emara

Theses and Dissertations

Abstract

Trauma-informed education is gaining momentum in higher education as a framework that seeks to create learning environments that are safe, inclusive, and responsive to the emotional and psychological needs of students—particularly those who have experienced trauma. This qualitative study, situated at the American University in Cairo (AUC), explores how faculty perceive, understand, and implement trauma-informed practices in a diverse university context that includes refugee and displaced students. Data were collected through semi-structured interviews with seventeen faculty members from various disciplines and incorporating an autoethnographic reflection. An expert interview was conducted with Dr. Mays Imad, a leading scholar in trauma-informed …

Wildfire Hydrologic Impacts, Kathleen E. Inman

Theses and Dissertations

Wildfires are essential processes for certain ecosystems but are increasing in severity and occurrence. These increases are negatively changing hydrology. Anticipating the hydrologic changes is necessary for management of effected watersheds, infrastructure, and downstream users. This study hypothesized land cover changes post-fire would increase water temperature and discharge in burned watersheds located in the Willamette Basin. This study (1) evaluated the change in estimated curve numbers (CN) from land cover pre-fire and post-fire to assess expected runoff impacts in watersheds, and (2) identified the significance of actual water temperature and discharge changes using non-parametric statistical analysis. An unburned watershed and …

Evaluating The Efficacy Of Functional Feed Additives In Broilers With Or Without A Live Coccidiosis Vaccine Challenge, Dalton Gerard Dennehy

Theses and Dissertations

Functional feed additives, such as probiotics, prebiotics, and phytogenics, have seen increased usage in commercial poultry production due to their ability to improve growth performance, meat yield, and overall health status. Therefore, the objective of this research was to evaluate the efficacy of functional feed additives in broilers with or without an enteric challenge induced via a live coccidiosis vaccine (LCV). In the first study (Chapter II), broilers were raised on used litter without an LCV challenge and fed varying levels of a multi-strain Bacillus-based probiotic in the starter phase (1x or 2x dose). Reduced performance was observed in early …

“Sometimes The World Don’T Give You What You Need”: Black Motherhood And Kinship As Resistance To Necropolitics In Jesmyn Ward’S Bois Sauvage, Hailey N. Reeder

Theses and Dissertations

This thesis explores how Black motherhood and kinship serve as subversive forces within necropolitical landscapes in Jesmyn Ward’s Where the Line Bleeds, Salvage the Bones, and Sing, Unburied, Sing. Drawing on Achille Mbembe’s theory of necropolitics, this study examines how the economic and social constraints of these environments disrupt Black family structures, emphasizing the necessity of kinship for survival. In Where the Line Bleeds, Cille’s absence disrupts traditional family roles, yet kinship networks allow the family to endure. In Salvage the Bones, Esch’s journey redefines the “bad” Black teen mother stereotype, highlighting how kinship offers support amidst stigma. In Sing, …

An Investigation Into The Inclusivity, Methodology, And Education Of Severe Weather In K-12 Schools, Stephen Holden Wooten

Theses and Dissertations

Schools are a focal point in the lives of everyone in the community, especially teachers, parents, and students. Investigating the connection between these individuals and tornadoes by identifying shortcomings in education, training, and emergency procedures can induce more effective and informed decision-making for future encounters. This study evaluated the inclusivity of tornado protocols for students with disabilities, uncovered where parents prefer their child to shelter in early dismissal situations and clarified how extensively natural hazard education and tornado drills are covered in schools. Two surveys and semi-structured interviews were used to obtain responses from earth science teachers, K-12 guardians, and …

Synthetic Data Augmentation For Retinoblastoma Using Diffusion, Andrew Thompson

Theses and Dissertations

Many AI models rely on large and high quality datasets for optimal training. In certain cases, data can be difficult or expensive to obtain, making training difficult. Rare medical conditions are one of these cases. Datasets for retinoblastoma are severely lacking in quantity. Diffusion has been used to create synthetic data in the industrial, medical, and financial domains. By applying the latest Diffusion methods to retinoblastoma, this work seeks to improve predictive model performance on identifying retinoblastoma.

“Here For Everyone” (?): How Intimate Partner Violence Service Organizations Address Community Needs And Transgender Inclusion In The Deep South, Brian Tesch

Theses and Dissertations

Transgender individuals face disproportionately high rates of intimate partner violence (also known as IPV) when compared to other sociodemographic groups. Despite this prevalence, IPV service organizations in the Deep South (e.g., Alabama, Georgia, Louisiana, Mississippi, and South Carolina), a region of the U.S. encompassing several rural communities and characterized by traditional gender norms and conservative Christian religious values, may have difficulties meeting the unique needs of transgender IPV survivors. This dissertation explores two key areas: (1) the perceptions of IPV service organization staff members in the Deep South concerning how their agencies assist members of the transgender community, and (2) …

Estimation Of Soybean Root Traits Using Computer Vision And Deep Learning, Muhammad Usman

Theses and Dissertations

Root phenotyping provides insights into root structure, function, and response to environmental stimuli, aiding researchers in improving crop yields, developing new plant varieties, and enhancing plant health. Traditionally, measuring root traits, such as length and area, is manual, time-consuming, and resource intensive. This study introduces a deep learning-based computer vision method for soybean root segmentation and traits estimation using RGB (red, green, blue) images captured under controlled illumination. A separate web-based application was also developed that can extract the root length and area using RGB images. A diverse set of 3,363 soybean root images was collected using an in-house root …

The Role Of K-12 Educators In Shaping Stem Pathways: Examining Social Capital And Self-Efficacy In Stem Education, Holly Trisch

Theses and Dissertations

This dissertation examines the impact of K-12 educators on students’ pathways in STEM (Science, Technology, Engineering, and Mathematics) by focusing on two main factors: the social capital of K-12 and elementary school teachers and the self-efficacy of preservice teachers in STEM education instruction. The first study investigates the social capital of first year engineering students, emphasizing the relationships and resources they gained during their K-12 education that influenced their decision to major in engineering. A quantitative study using survey data collected from first-year undergraduate engineering students indicates that K-12 educators play a crucial role by providing mentorship and resources that …

Combined Effect Of Chitosan And Lemon Essential Oil-Infused Slush Ice On The Shelf Life Of Channel Catfish, Dianna Wilson

Theses and Dissertations

The objective of this research was to investigate the biopreservative effects of chitosan and lemon essential oil in slush ice treatments on the microbial shelf life of refrigerated catfish fillets. Catfish fillets were stored in slush ice treatments containing chitosan (CH), lemon essential oil (LO), a combination (CH+LO), water (CTRL), and no slush (NS) for three d at 4 C, then stored at 4C for twelve d post-slush. The growth of background microflora in catfish fillets treated with CH and CH+LO was reduced (P<0.05), maintaining total aerobic counts below 4.5 log CFU/g, while the control reached spoilage levels (>7 log CFU/g) by Day 6. Chitosan effectively extended the microbial shelf life but lowered pH, …

Work-Life Balance And The Impact Of Covid-19 On Faculty At Historically Black Community Colleges (Hbccs), Taneshia Turner Winston

Theses and Dissertations

This research study was conducted to determine how the COVID-19 pandemic affected the work-life balance of faculty at HBCCs based on their race, gender, age, marital status, and tenure status. The study employed a quantitative research design utilizing Exploratory Factor Analysis (EFA) to conduct time-based activities separately and group perception-based response variables into meaningful categories to uncover patterns. To analyze the differences in race, gender, age, marital status, and tenure status, Regression and Chi-square test analyses were used to evaluate the collected data. Regression analysis explored relationships between time spent on activities and perceptions of stress, productivity, and satisfaction. Chi-square …

Myxozoan Diversity And Life Cycles In Catfish Production Ponds In Mississippi, Usa, Ethan Woodyard

Theses and Dissertations

Catfish aquaculture is a critical industry in the United States and Mississippi in particular. The industry is beset by depredation, rising feed costs, competition with imports, and loss to disease. Chief among these is the myxozoan parasite and causative agent of proliferative gill disease, Henneguya ictaluri. In chapter 2, novel molecular markers for greater resolution in species identification of these parasites are provided, allowing more robust life cycle inference, species-level identifications, and inference of evolutionary relationships through molecular phylogenetic analyses. Chapters 3–5 apply the approaches developed in Chapter 2 to a broad array of taxa beyond catfish-infecting Henneguya spp. These …

Effects Of Different Forms Of Dietary Zinc On Weaned Steers When Fed Prior To Weaning, Christopher Lane Addison

Theses and Dissertations

Zinc (Zn) is crucial for many life sustaining processes within the body. Additional Zn is known to be beneficial during certain periods of increased stress. Weaning is one of the most stressful periods of beef calves’ lives. Due to this it was hypothesized that additional zinc in an organic form would increase weight gain and immune response compared to additional zinc in an inorganic form or no added zinc. No differences were found for ADG, Th score, IgG concentration, or mineral concentration among treatments. However, there was a novel and unexpected finding when there was no difference found in preweaning …

Empowering Patients With Health Insights: Development And Utilization Of Knowledge Graphs For Comprehensive Patient Medical Journey Mapping And Analytics, Hassan Saadeddine Al Khatib

Theses and Dissertations

Healthcare advancements require advanced solutions to process and understand complex patient data. This dissertation outlines a detailed framework for mapping patient journeys with knowledge graphs (KGs), which begins by analyzing existing Patient-Centric Knowledge Graphs (PCKGs) literature to identify current research gaps in the representation and analysis of patient journeys. Our research proposes solutions to these gaps through three main contributions. First, we introduce the Patient Journey Ontology (PJO), which enables systematic encoding of patient encounters, diagnoses, treatments, and outcomes into a semantic knowledge structure designed for interoperability. The construction of patient journey knowledge graphs (PJKGs) is based on this foundational …

In Search Of Educational Justice: Lived Experiences Of Community College Presidents And Their Authentic Critical Leadership, Juan Felipe Arzola

Theses and Dissertations

There are several gaps in research related to the fields of study of community college leadership and its influence on shared governance discussions and decision-making. The purpose of the current study is to address the gap in the study of community college leadership and its influence on shared governance discussions and decision-making through a critical, intersectional investigation of authentic critical leadership and its potential to influence shared governance group discussions and decision-making in distinctively different ways than those advocated by mainstream leadership theories. Participants participated in semi-structured interviews and were observed in a shared governance group meeting to identify evidence …

The Influence Of Nature On Design: A Focus On The Flora And Fauna Influence On 18th And 19th Century Decorative Arts, Rachel Ann Bozeman

Theses and Dissertations

This study aims to assist interior designers and preservationists in enhancing interior decoration by appreciating decorative arts in a historically accurate and visually appealing manner. It places a strong emphasis on the profound influence of nature on design. For centuries, creatives have drawn inspiration from nature, leading to the creation of unique design elements and decorative objects. In the eighteenth and nineteenth centuries, naturalists produced floral and faunal prints that reflected this inspiration. Nature's impact on design extends beyond aesthetics; it also affects how individuals feel within a space. The environment one person inhabits influences his or her state of …

The Effect Of Ultrasound Transducer Type On Diagnosing Medial Meniscal Injury In Dogs With Cranial Cruciate Ligament Injury, Thomas Campbell

Theses and Dissertations

Ultrasonography is reported to be accurate in diagnosing meniscus injuries in dogs but the effect of transducer type has not been studied. The aim was to determine the effect of ultrasound transducer type on utility of meniscal ultrasound. We hypothesized that ultrasonography will provide good diagnostic utility for meniscal injury and that linear transducers will perform best. In this prospective study, the ultrasonographic findings of the medial meniscus using three transducers were compared to arthrotomy findings. Thirty-nine stifles were included with an injury prevalence of 23/39 (59%). The standard linear transducer provided the highest negative predictive value (60%). The small …

The Role Of Institutional Image In First-Generation Student Choice To Attend A Rural Southern Community College, Megan Caves Clark

Theses and Dissertations

As higher education continues to become more competitive with each passing year, research indicates that a favorable image perception of an institution can be achieved through strategic social media presence. With previous literature primarily discussing the impacts of institutional image at a university level, this dissertation explores the role of institutional image in first-generation student choice to attend a rural Southern community college. Using photo elicitation, this qualitative study sought to understand how a rural community college’s social media influences rural, first-generation student’s perception of the college. Results indicated that institutional image perception through social media may play a role …

Evaluating The Feeding Value Of Almond Hulls And The Supplementation Of Carbohydrases On Performance, Egg Quality, Nutrient Digestibility And Intestinal Health In Lsl-Lite Hens, Nelly Giovanna Cribillero Chuquihuaccha

Theses and Dissertations

Almond hulls (AH) are a by-product of the almond nut processing rich mainly in insoluble fiber. Addition of fiber in the diet has been shown positive results in performance in poultry. However, scientific literature on the use of AH in poultry is limited. The objective of this dissertation was to determine the effect of the supplementation of ground AH and cellulase-xylanase carbohydrase enzyme (E) inclusions on performance, egg quality, ileal nutrients digestibility, jejunum gene expression and ceca microbiota of Lohmann LSL-Lite pullets and laying hens from 0 to 70 weeks of age. Chapter I describe the knowledge on the composition …

Neural Signatures Of Adhd: A Fast Periodic Visual Stimulation Eeg Study, Haleigh Brielle Davidson

Theses and Dissertations

Fast Periodic Visual Stimulation (FPVS) offers an objective approach for investigating neural responses to emotional stimuli. This study explores the use of FPVS to identify neurophysiological markers associated with Attention Deficit Hyperactivity Disorder (ADHD) by comparing brain responses between ADHD and Non-ADHD participants. EEG data were collected while participants viewed sequences of neutral faces mixed with emotional oddball expressions (Angry, Fear, Happy, and Sad). Frequency-domain analyses were performed to compute Baseline-Corrected Amplitudes (BCA) and Signal-to-Noise Ratios (SNR) across occipitoparietal, occipitotemporal, parietal, and frontal regions of interest. Results revealed significantly reduced BCA and SNR values in ADHD participants, particularly in the …

The Effects Of Ataxin-1 Overexpression In The Central Nervous System On Specific Behavioral And Physiological Characteristics Of Drosophila Melanogaster, Sydney Davis

Theses and Dissertations

Spinocerebellar ataxia type 1 (SCA1) is a dominantly inherited neurodegenerative disease caused by a CAG repeat expansion in the ataxin-1 gene, which results in an abnormally long polyglutamine tract. Similarly, overexpression of wildtype Ataxin-1 (wt-Atx-1) in Drosophila melanogaster leads to neurodegeneration, reduced lifespan, and impaired negative geotaxis. Observations include disruptions in sleep-wake cycles, increased oxidative stress biomarkers (like protein carbonyls), and dysregulation of developmental genes such as armadillo (arm) and nemo kinase (nmo). Additionally, elevated expression of SUMOylation-related genes (Aos-1, Uba2, and dSmt3 or dSumo) and increased SUMO protein levels indicate enhanced SUMOylation in the brain. Quantitative analysis of neuronal …

Lateral Control Of Autonomous Vehicle Using Deep Cnn And Ampc, Iffat Ara Ebu

Theses and Dissertations

Autonomous functionalities are pivotal for the advancement of Advanced Driver Assistance Systems (ADAS), driving towards collision-free and environmentally sustainable transportation. This thesis presents two distinct studies addressing critical aspects of autonomous vehicle control: lane centering via deep learning and lateral vehicle control using model predictive control. The first study explores end-to-end learning f or autonomous s teering command generation, focusing on lane centering. A convolutional neural network (CNN) model, inspired by NVIDIA’s PilotNet, is employed to directly map raw camera pixel inputs to steering commands, eliminating the need for intermediate feature engineering. The model is trained and validated using datasets …

Assessment Of Water Quality And Remediation Of Heavy Metals In A Coastal System, Christiana Fumnanya Eziashi

Theses and Dissertations

This research focuses on a three-part study to assess water quality in a coastal system and evaluate the absorption capacity of modified biochar and algae to remediate cadmium (Cd). The first chapter introduces the hypothesis and objectives, and the second chapter provides a detailed literature review. The third chapter focuses on the first study, where surface water samples and water quality data collected from a manned boat and a novel autonomous surface vessel (ASV) in the Western Mississippi Sound (WMS) in the summer of 2021 and 2022 were analyzed and the interrelationship between the nutrient, trace metals, salinity, and chlorophyll-a …

Assessment Of Pagp Gene Function In Avian Pathogenic Escherichia Coli Pathogenicity Using Different Challenge Models, Hailey Fugate

Theses and Dissertations

Avian pathogenic Escherichia coli (APEC) is a leading cause of morbidity and mortality in poultry, contributing an estimated $40 million in annual losses in the U.S. broiler industry alone, and contributing to growing concerns over antibiotic resistance. This study investigated the role of the pagP gene, which encodes a lipid A palmitoyl transferase involved in immune evasion, using both a broiler chick and embryo challenge model. Deletion of pagP significantly reduced mortality and lesion severity in broilers, indicating its role in APEC pathogenicity. However, in embryos, pagP deletion had minimal effects on survival and bacterial colonization, suggesting alternative virulence mechanisms …

Impact Of An Automated Brush System On Intensively Managed Lactating Dairy Cattle Behavior, Production, And Stress Physiology, Allison Lyn Griffin

Theses and Dissertations

The dairy industry has increasingly prioritized improving animal welfare for intensively housed cows. This study evaluated the effects of environmental enrichment (EE) using an automated brush system on stress physiology, behavior, and productivity of lactating dairy cows. Fifty-nine pregnant and lactating dairy cows were divided into two groups: CON (no brush) and TRT (automated brush system). Saliva samples were collected to measure cortisol concentrations, and behaviors were monitored in the morning (07:00 h - 11:00 h) and evening (19:00 h - 23:00 h) using high-resolution cameras. The results indicated that cows with brush access had lower cortisol concentrations, suggesting reduced …

How Do Tuition Benefits Affect University Staff Retention, Social Connection, And Institutional Commitment?, Lian A. Harris

Theses and Dissertations

Employee retention is costly for many companies, including colleges and universities. Tuition benefits have been shown to be helpful in recruitment and retention. This study looked at how tuition benefits used by university staff members affected turnover intentions, workplace belonging and institutional commitment. Benefits eligible university staff members, who were in primarily non-teaching roles at one rural, four-years land grant university were asked to complete an electronic survey, and 250 responses were collected. To measure the variables of interest the survey combined scale items representing each of the dependent variables; turnover intention (Bothma & Roodt, 2013), workplace belonging (Jena & …

The Effects Of Biological Products On Soybean In Mississippi, Tucker Alan Hilyer

Theses and Dissertations

Biological products are an option being marketed towards Mississippi soybean producers that have many purported effects. The objective of this study was to evaluate the effects of biological products across the predominant soybean growing regions of Mississippi. Products were evaluated at seven site-years in Mississippi during the 2023 and 2024 growing season against an untreated and treated control in a randomized complete block design. Products were evaluated for agronomic, morphological, and pathological effects. Very few effects from biological products were observed. With a lack of effects, adoption of these biologicals in Mississippi may be seldom.