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Synthesis And Degradation Of Biobased Polymers From Plant Oils Incorporated With Cellulose Nanocrystals., Katherine Elmore May 2024

Synthesis And Degradation Of Biobased Polymers From Plant Oils Incorporated With Cellulose Nanocrystals., Katherine Elmore

Theses and Dissertations

Synthetic plastics are intrinsic to modern human existence. Unfortunately, many challenges exist related to the accumulation of plastic waste, including greenhouse gas emissions, contamination of natural environments, and entrance into the food chain through microplastics. Therefore, new polymers are being developed that both compete with the capabilities and costs of petroleum-based plastics and have assured biodegradability. Through decades of research, plant oils have emerged as one of the leading options for alternative starting materials because of their feasibility for use in polymerization reactions, wide availability, renewability, and cost-effectiveness. In this work, cottonseed oil (CSO) and soybean oil (SBO) are successfully …


Stimulus Complexity And Feature Binding In Visual Sensory Memory, Mary F. Catington May 2024

Stimulus Complexity And Feature Binding In Visual Sensory Memory, Mary F. Catington

Theses and Dissertations

In all past research, iconic memory shows a significant benefit over visual working memory for storage capacity of visual items. However, this effect has only been studied on simple items such as colors and letters. The goal of this thesis was to determine whether an iconic benefit also exists for visual stimuli with higher visual complexity, such as shapes and faces. Five experiments tested iconic and working memory capacity for complex face stimuli, intermediate-complexity shape stimuli, and simple color stimuli, as well as examining feature binding of objects in iconic memory. Results from these five experiments indicated that increased visual …


Functional Complementation And Occidiofungin Susceptibility Of Fungal Actin Orthologs In S. Cerevisiae, Moshood Fagbolade May 2024

Functional Complementation And Occidiofungin Susceptibility Of Fungal Actin Orthologs In S. Cerevisiae, Moshood Fagbolade

Theses and Dissertations

Occidiofungin is an antifungal compound that targets the conserved cytoskeletal protein, actin. Despite >90% amino acid conservation between fungal actin proteins, sensitivity to occidiofungin has been shown to vary with C. albicans, F. oxysporum, and P. digitatum exhibiting a resistant profile relative to S. cerevisiae. To determine whether differences in the amino acid sequences of actin contribute to differences in occidiofungin susceptibility, we expressed the actin gene from these fungal organisms in the ACT1 S. cerevisiae shuffle strain. Functionality of actin gene products was determined by measuring growth kinetics, actin protein levels, nuclear position, and actin cable formation. Results demonstrated …


Feasibility And Effectiveness Of Physical Activity Program In People With Down Syndrome Using Self Determination Theory, Maria Haider May 2024

Feasibility And Effectiveness Of Physical Activity Program In People With Down Syndrome Using Self Determination Theory, Maria Haider

Theses and Dissertations

Autonomous physical activity (PA) is challenging for adults with Down syndrome (DS) therefore PA programs tailored around facilitators of PA in individuals with Down syndrome (DS) that also align with Self-determination theory (SDT) components could be a feasible and effective way of increasing PA. The purpose was to assess the feasibility and effectiveness of a physical activity program based on self-determination theory in adults with Down syndrome. A dance program was conducted twice a week for 8 weeks. Each session was 60 minutes long. Adults with DS (n = 8) were tested before and after intervention for basic psychological needs …


Towards Clearer Paths: Addressing Camera Obstructions In Autonomous Vehicles Through Neural Networks, Nicholas J. Harvel May 2024

Towards Clearer Paths: Addressing Camera Obstructions In Autonomous Vehicles Through Neural Networks, Nicholas J. Harvel

Theses and Dissertations

This study addresses the challenge of lens obfuscations in off-road autonomous vehicles, which compromise the essential visual inputs for safe navigation. Using a tiered approach, the research employs neural network architectures for preliminary image classification, semantic segmentation, and image-to-image translation to rectify obscured visual inputs. Initial classification using MobileNetV2 sets the stage for U-Net-driven semantic segmentation to identify obfuscated regions, followed by a modified Pix-to-Pix model for image restoration. The evaluation showcases promising results in improving visual clarity, marking a significant stride towards enhancing autonomous vehicle operational robustness in off-road environments. This work lays a foundation for future explorations into …


Effects Of Subconjunctival Ropivacaine, Tetracaine, Mepivacaine, And Liposomal Bupivacaine On Corneal Sensitivity In Healthy Horses, Gabriel Alexander Gonzalez May 2024

Effects Of Subconjunctival Ropivacaine, Tetracaine, Mepivacaine, And Liposomal Bupivacaine On Corneal Sensitivity In Healthy Horses, Gabriel Alexander Gonzalez

Theses and Dissertations

Corneal sensitivity and adverse events following subconjunctival administration of three local anesthetics in twelve mares were evaluated. The subconjunctival space of the treated eye was injected with 0.2 mL of mepivacaine (2%), ropivacaine (1.3%) and liposomal bupivacaine (1.3%). All horses received each medication once and the contralateral eye received saline. The corneal touch threshold (CTT) was measured using a esthesiometer before sedation, after sedation, and at specified intervals until it returned to baseline. The mean total time of anesthesia (TTA) was 168.3 minutes for ropivacaine, 169.2 minutes for liposomal bupivacaine, 103.3 minutes for mepivacaine and 30.7 minutes for control. The …


Estimating Surface Reflectivity With Smartphone And Semi-Custom Gnss Receivers On Uas-Based Gnss-R Technology And Surface Brightness Temperature Using Uas-Based L-Band Microwave Radiometer, Md Mehedi Farhad May 2024

Estimating Surface Reflectivity With Smartphone And Semi-Custom Gnss Receivers On Uas-Based Gnss-R Technology And Surface Brightness Temperature Using Uas-Based L-Band Microwave Radiometer, Md Mehedi Farhad

Theses and Dissertations

Accurate measurement of soil moisture (SM) has a significant impact on agricultural production, hydrological modeling, forestry, horticulture, waste management, and other environmental fields. Particularly in precision agriculture (PA), high spatiotemporal resolution information about surface SM is crucial. However, the use of invasive SM probes and other sensors is expensive and requires extensive manpower. Moreover, these intrusive techniques provide point measurements and are unsuitable for large agricultural fields. As an alternative, this dissertation explores the remote sensing of surface SM by utilizing the surface reflectivity estimated from global navigation satellite systems reflectometry (GNSS-R) data acquired through smartphones and off-the-shelf, cost-effective U-blox …


Charting The Course Through Complexity: Networked Approaches To Foster Sustainable And Resilient Supply Chains., Safae El Amrani May 2024

Charting The Course Through Complexity: Networked Approaches To Foster Sustainable And Resilient Supply Chains., Safae El Amrani

Theses and Dissertations

Amidst a dynamic global landscape, supply chains have transformed into complex, interdependent networks. These ever-growing complexities can catalyze a snowball effect, where minor disruptions ripple through sub-infrastructures, culminating in significant cascading failures. As a result, the imperative to bolster supply chain sustainability and resilience has never been greater. This dissertation explores the intricate dynamics of supply chain sustainability and resilience, introducing innovative methodologies for assessing and enhancing these critical aspects. This dissertation rigorously examines the themes of sustainability and resilience within supply chain networks through distinct yet complementary lenses. Initially, it delves into sustainability by introducing the Supply Chain Performance …


Evaluating The Effects Of Poultry Litter Amendments On Escherichia Coli Populations, Virulence Genes, And Antimicrobial-Resistance Genes In Poultry Litter During A Live Grow-Out., Faith Henson May 2024

Evaluating The Effects Of Poultry Litter Amendments On Escherichia Coli Populations, Virulence Genes, And Antimicrobial-Resistance Genes In Poultry Litter During A Live Grow-Out., Faith Henson

Theses and Dissertations

Poultry litter can harbor pathogenic bacteria, including avian pathogenic Escherichia coli (APEC). Applying litter amendments is one strategy to improve bird health and potentially reduce pathogens. Biochar and PLT were applied as litter amendments in a live bird trial to study their effects on E. coli populations, APEC virulence genes (VAG), and antimicrobial resistance (AMR) genes. Samples were collected at days 0, 17, 29, and 41 to enumerate E. coli and store bacterial isolates for antimicrobial-resistance gene analysis. Data analysis showed litter amendments did not significantly affect overall E. coli populations. Grow-out time impacted E. coli populations, with reductions occurring …


The Effects Of Vitamin D Supplementation On Prostate Cancer, Grier Cosby May 2024

The Effects Of Vitamin D Supplementation On Prostate Cancer, Grier Cosby

Theses and Dissertations

This systematic review's goal is to evaluate the efficacy of vitamin D supplementation in helping to manage the nutritional needs of patients diagnosed with prostate cancer. A systematic literature search following the PRISMA guidelines using Scopus, PubMed, and Cochrane databases was conducted to review randomized controlled trials and interventional studies up to 2023. The search strategy targeted randomized controlled trials and intervention studies. The selection process involved screening for study characteristics (study design), participant demographics (prostate cancer patients receiving treatment), intervention details (vitamin D assessment methods, dosages), outcome measures (progression, prognosis, quality of life), and risk estimates (hazard ratios, odds …


Continuum And Discrete Models For Particle-Based Heat Exchangers In Thermal And Thermochemical Energy Storage, Ashreet Mishra May 2024

Continuum And Discrete Models For Particle-Based Heat Exchangers In Thermal And Thermochemical Energy Storage, Ashreet Mishra

Theses and Dissertations

Thermal energy storage (TES) systems based on renewable energy sources (concentrated solar, wind, and photovoltaic etc.) are crucial to reducing dependence on conventional energy generation systems and reducing renewable energy’s intermittent nature. TES can be utilized in conjunction with concentrated solar power (CSP) in particle-based power cycles where the particles can be charged (heat addition) using solar energy and then discharged (heat extraction) using particle-based heat exchangers (HX). Efficient particle based HXs are vital in coupling heat transfer fluid (HTF) from thermal receivers to power cycle working fluid (WF). Heat transfer enhancement is essential for adopting particle-based moving packed-bed heat …


Improving Cultural Safety: A Thematic Analysis Of Older Rural African Americans’ Experiences With The U.S. Healthcare System, Sarah Marie Israel May 2024

Improving Cultural Safety: A Thematic Analysis Of Older Rural African Americans’ Experiences With The U.S. Healthcare System, Sarah Marie Israel

Theses and Dissertations

Despite an increase in research regarding the healthcare outcomes and experiences of diverse groups, some significant gaps in the literature remain. Among the most understudied and underserved groups are those with intersectional identities. Although researchers have made significant efforts to increase research regarding health care experiences of people of color, older adults, and rural populations, less is known about the health care experiences of older rural African Americans. Due to the lack of research focusing on the unique experiences of this intersectional group, qualitative research was an important first step towards broadening this research base. This study utilized a cultural …


Uncertainty Analysis For Runoff, Crop Yield, Sediment, And Nutrient Loads In The Mississippi Delta Region Using Apex, Javier Fernando Méndez Monroy May 2024

Uncertainty Analysis For Runoff, Crop Yield, Sediment, And Nutrient Loads In The Mississippi Delta Region Using Apex, Javier Fernando Méndez Monroy

Theses and Dissertations

Understanding the dynamics of agricultural basins has been difficult for decision-makers when developing cost-effective plans. An uncertainty analysis evaluates the impact of information gaps on hydrologic model’s output and performance. The Agricultural Policy/Environmental Extender (APEX v1501) was used to predict runoff, crop yield, sediment load, total phosphorus, and total nitrogen from agricultural fields in the Mississippi Delta to investigate the impact of using different input variables (climate, soils, and management practices) on mechanistic models. Results indicated that the use of surrogate information such as weather data from close weather stations, a predominant soil series, and simulated irrigation schedules, could be …


Submissive Natures, Subversive Acts: Power, Prescriptive Literature, And The Female Voice In Shakespeare’S Comedies, Joseph N. Newell May 2024

Submissive Natures, Subversive Acts: Power, Prescriptive Literature, And The Female Voice In Shakespeare’S Comedies, Joseph N. Newell

Theses and Dissertations

This thesis explores prescriptive literature and conduct books, specifically The Book of Homilies, and how these prescriptions manifest in Shakespeare’s work. This text examines the depictions of marital relationships and argues that the actions of husbands in two of Shakespeare’s comedies, The Taming of the Shrew and The Merchant of Venice, deviate from prescriptive ideals that homilies deem proper for the husband-and-wife relationship. Through the combination of new historicism and gender criticism, this thesis suggests that Katherine and Portia use submission to gain agency in moments when they seem to have none while showing that the men do not fulfill …


Investigating The Pretesting Effect Under Cognitive Load Through Increased Playback Speed, Oscar Ramirez Perez May 2024

Investigating The Pretesting Effect Under Cognitive Load Through Increased Playback Speed, Oscar Ramirez Perez

Theses and Dissertations

Pretesting prior to a study session has been shown to benefit memory for pretested information compared to traditional study. While previous research has not found a detriment to non-pretested but related material, it is possible that taxing attention by increasing the playback speed of presented material could reveal such impairments. The current study (N = 239) compared multiple-choice learning from educational videos at 1x, 1.5x, and 2x speeds. Three videos (one at each speed) were presented after a pretest, for which half of the tested material was pretested, and half was not (non-pretested related). Another three videos were presented without …


Preparing To Come Home, Not Recidivate: Juvenile Offenders' Perceptions Of The Juvenile Justice System, Robbie Kaitlyn Salters May 2024

Preparing To Come Home, Not Recidivate: Juvenile Offenders' Perceptions Of The Juvenile Justice System, Robbie Kaitlyn Salters

Theses and Dissertations

Crimes committed by juvenile offenders are a significant concern of society. In response to this concern, the juvenile justice system addresses juvenile crimes in a developmentally appropriate manner. The goal of the juvenile justice system is to rehabilitate juvenile offenders and steer them from a life of crime and toward becoming productive members of society. Yet, some juvenile offenders continue to offend. While research has explored juvenile offenders’ perceptions of juvenile delinquency, re-entry, and recidivism, less is known about how the detention center prepares juvenile offenders for re-entry. The following study explores the perceptions of detained juvenile offenders in a …


Process Parameter Optimization Of M300 Maraging Steel And Mechanical Characterization Of Uniformly And Selectively Scaled M300 Cellular Structures, Haley Elizabeth Petersen May 2024

Process Parameter Optimization Of M300 Maraging Steel And Mechanical Characterization Of Uniformly And Selectively Scaled M300 Cellular Structures, Haley Elizabeth Petersen

Theses and Dissertations

Laser powder bed fusion is a type of metal-based additive manufacturing method that can be customized for a given material through modification of process parameters, resulting in changes to the overall quality and mechanical properties of the as-built component. Optimal mechanical properties are typically achieved by performing experimental builds of fully dense components with multiple parameter sets and comparing the resulting mechanical properties. Additionally, AM allows geometric freedom that can be utilized to produce structures tailored for energy absorption, such as cellular structures or lattice structures. There is limited previous work of scaling effects on mechanical properties of cellular structures. …


Evaluating Efficacy Of Modified Barrier Operations To Limit Silver Carp Movements In The Mississippi Alluvial Valley, Joshua Stafford May 2024

Evaluating Efficacy Of Modified Barrier Operations To Limit Silver Carp Movements In The Mississippi Alluvial Valley, Joshua Stafford

Theses and Dissertations

Invasive Silver Carp (Hypophthalmichthys molitrix) have spread throughout the Mississippi River basin and threaten native species. The Lower Mississippi Alluvial Valley has numerous water-control structures. These structures could potentially be operated to limit expansions of invasive fishes. My goal was to examine the effects of two water-control structures on movements of Silver Carp within a floodplain network of waterbodies, including an oxbow lake (Eagle Lake; LA, MS). I monitored Silver Carp movements with an acoustic array and bi-monthly active tracking. No movements occurred through the structure managed to deter carp while nine carp passed through the structure that is not …


“Freakish Man”: Sexual Blues, Sacred Beliefs, And The Transformation Of Black Queer Identity, 1870-1957., Xavier E. Sivels May 2024

“Freakish Man”: Sexual Blues, Sacred Beliefs, And The Transformation Of Black Queer Identity, 1870-1957., Xavier E. Sivels

Theses and Dissertations

“‘Freakish Man’: sexual blues, sacred beliefs, and the transformation of Black queer identity, 1870-1959” investigates how queer Black men expressed their gender and sexual identities. It follows how, from the days of Reconstruction to the modern civil rights movement, queer Black men used various aspects of Black culture—particularly the blues, working-class social culture, and charismatic religion—to form identities that departed from dominant Black and white norms. The “freakish man” emerged as queer Black men cultivated legible, subversive gender and sexual identities in sacred and secular spaces of working-class Black culture that prioritized masculine heterosexuality. Though queer Black men were briefly …


The Role Of Subsurface Dynamics In Cometary Outbursts, Ahmad Sohani May 2024

The Role Of Subsurface Dynamics In Cometary Outbursts, Ahmad Sohani

Theses and Dissertations

Comets, often referred to as cosmic time capsules, serve as invaluable repositories of information from the nascent phases of our solar system. Varying significantly in size, with nuclei ranging from a few kilometers to tens of kilometers in diameter, these celestial bodies are complex, porous aggregates of organic molecules, silicate particles, and entrapped volatile gases. Their orbits, which can be categorized into the Main Belt, the Kuiper Belt, and the Oort Cloud, offer distinct insights into their origins and the early conditions of the solar system. Understanding the physical processes occurring within these nuclei is critical, particularly in the context …


Performance Evaluation Of Low-Cost Gps Machine Guidance Systems For Livestock Production Forage And Pasture Management Applications, Conner Childress Wright May 2024

Performance Evaluation Of Low-Cost Gps Machine Guidance Systems For Livestock Production Forage And Pasture Management Applications, Conner Childress Wright

Theses and Dissertations

Global Positioning System (GPS) machine guidance aids in the precise navigation and piloting of farm machinery and serves to boost productivity and optimize farm operations. Characterization of low-cost GPS guidance systems for livestock production operations is necessary for return on investment (ROI) decision making. The objective of this research is to characterize the accuracy of four commercially available low-cost ($985 - $4,200) wide area augmentation system (WAAS) corrected GPS guidance systems. Testing procedures were designed in accordance with the ASABE/ISO standard 12188-2 for testing of satellite-based guidance systems during straight line travel. The vehicles lateral deviation of a planned path, …


Enhancing Data-Driven Process Quality Control In Metal Additive Manufacturing: Sensor Fusion, Physical Knowledge Integration, And Anomaly Detection, Christian E. Zamiela May 2024

Enhancing Data-Driven Process Quality Control In Metal Additive Manufacturing: Sensor Fusion, Physical Knowledge Integration, And Anomaly Detection, Christian E. Zamiela

Theses and Dissertations

This dissertation aims to provide critical methodological advancements for sensor fusion and physics-informed machine learning in metal additive manufacturing (MAM) to assist practitioners in detecting quality control structural anomalies. In MAM, there is an urgent need to improve knowledge of the internal layer fusion process and geometric variation occurring during the directed energy deposition processes. A core challenge lies in the cyclic heating process, which results in various structural abnormalities and deficiencies, reducing the reproducibility of manufactured components. Structural abnormalities include microstructural heterogeneities, porosity, deformation and distortion, and residual stresses. Data-driven monitoring in MAM is needed to capture process variability, …


Synthesis Of Colloidal Nanomaterials Of Emerging Semiconductor Chalcogenide Perovskites And Related Structures, Daniel Zilevu May 2024

Synthesis Of Colloidal Nanomaterials Of Emerging Semiconductor Chalcogenide Perovskites And Related Structures, Daniel Zilevu

Theses and Dissertations

The quest for efficient and cost-effective thin-film photovoltaic (PV) materials has recently zeroed in on hybrid lead halide perovskites, owing to their low cost, ease of processing, and exceptional efficiency metrics—peaking at 33.9% when combined with silicon in tandem devices. Nevertheless, there are substantial concerns about the stability, toxicity, and consequential environmental footprint of lead-based perovskites, thereby necessitating rigorous research to identify and develop alternative materials with superior stability profiles and diminished toxicity. Amongst the myriad candidates, chalcogenide perovskites and their related structures, represented by the empirical formula ABQ3 (with A = Ca, Ba, Sr; B = Zr, Hf, Ti; …


Full Issue, Volume 12, Number 1, Donna J. Peterson, Scott Cummings May 2024

Full Issue, Volume 12, Number 1, Donna J. Peterson, Scott Cummings

Journal of Human Sciences and Extension

No abstract provided.


Strengthening Families Affected By Intimate Partner Violence: A Pilot Evaluation Of A Rural Extension Program, Pamela B. Payne, Jill Baker-Tingey May 2024

Strengthening Families Affected By Intimate Partner Violence: A Pilot Evaluation Of A Rural Extension Program, Pamela B. Payne, Jill Baker-Tingey

Journal of Human Sciences and Extension

Heart and Hope (H&H) was designed to provide parenting education and social-emotional skills to children and parents exposed to intimate partner violence (IPV) in rural Nevada. The goal was to evaluate IPV efforts by measuring parent (N = 47) and children’s (N =100) knowledge and behavior change around building healthy relationships and improved parenting practices following exposure to IPV and the H&H curriculum. Results indicated significant increases in both perceived knowledge and behavior change, suggesting that the program is effective in strengthening family relationships, improving parenting practices, developing emotional competency, and helping families envision a positive future. One of the …


Female Choice: Attraction In The Animal Kingdom, Lindsay Culpepper May 2024

Female Choice: Attraction In The Animal Kingdom, Lindsay Culpepper

Honors Theses

Across taxa, choosing a mate is one of the most crucial decisions a female can make. This choice can come with direct benefits like protection and parenting assistance, but it may also provide indirect benefits through the survival of her offspring and thus the continuation of her genes. The female considers numerous qualities when making that choice, evaluating aspects of potential mates’ physical appearance and behavior. Understanding female choice is crucial to effective animal conservation and management, as it has significant implications for captive breeding programs, both in terms of output and in preparing offspring for release. This thesis will …


On The Political Economy Of Knowledge-Production - An Interview With Richard Wolff, Maria Cernat Apr 2024

On The Political Economy Of Knowledge-Production - An Interview With Richard Wolff, Maria Cernat

Emancipations: A Journal of Critical Social Analysis

With her interview with Marxian economist Richard Wolff, Maria Cernat launches the two-part series on the political economy of knowledge production.


The Symbolic Capital Of The Neoliberal University, Chad Lavin Apr 2024

The Symbolic Capital Of The Neoliberal University, Chad Lavin

Emancipations: A Journal of Critical Social Analysis

The paper examines the concerns about the enduring value of liberal education in the broader context of a shift from a liberal to a neoliberal society. While so much literature on “the neoliberal university” tends to characterize neoliberalism as a hostile force invading the sacred space of the university, the knowledge comprising neoliberalism is in large part the product of research coming out of universities. Using the concept of symbolic capital to explore the role of university researchers in developing and consecrating neoliberal ideas, the paper argues that even in this era of heightened skepticism toward experts and expertise, university …


What Comes After The Critique Of The Corporate University? Toward A Syndicalist University, Clyde W. Barrow Apr 2024

What Comes After The Critique Of The Corporate University? Toward A Syndicalist University, Clyde W. Barrow

Emancipations: A Journal of Critical Social Analysis

For the past three decades, university faculty have produced a cascade of contemporary protest literature that routinely criticizes the knowledge factory, academic capitalism, managed professionals, college for sale, the university in ruins, the corporate corruption of higher education, and University, Inc. University faculty are regularly warned about the fall of the faculty, the last professors, and the last intellectuals. This article reviews the historical development of the corporate and neoliberal university, but it takes the next step of asking what is to be done after the critique of the corporate university. It calls on faculty to engage in a variety …


St. Mary Basilica, Cyndi C. Parker Apr 2024

St. Mary Basilica, Cyndi C. Parker

Reports

For the MFA's Historic Preservation course titled 'Building Materials Conservation', this is a case study of a historic building. Built in 1842, St. Mary Basilica is a landmark building for the small town of Natchez, the oldest city in the state of Mississippi. It’s one of the oldest religious buildings in the south, the first cathedral in the state, consecrated by the Roman Catholic church, and remains the state’s only Basilica, of which there are less than one hundred in the country. This research paper explores its history and examines its architectural significance, as well as its restorations throughout its …