Digital Commons Network^™

Management Zone Delineation For Variable-Rate Seeding In Production Soybeans, Ujjwal Sigdel

Graduate Theses and Dissertations

Soybean seeding rate (SR) is selected according to planting date, maturity group, soil properties, and yield goal. Even though one SR is applied in most fields, site-specific adjustments with variable-rate seeding (VRS) technology can help optimize production. The project goal was to determine if VRS could be beneficial to soybean producers in Arkansas. The project objectives were to i) assess planter performance and soybean yield response to five seeding rate treatments, ii) characterize the drivers of yield variability, and iii) create a-posteriori prescription maps for VRS. Five SR treatments (185,000, 247,000, 309,000, 370,000 and 432,000 seeds ha-1) were applied using …

A Framework Of Flow Models For The Development And Testing Of Cardiovascular Devices, Megan Laughlin

Graduate Theses and Dissertations

Cardiovascular disease (CVD) is the leading cause of death worldwide and its treatment continues to improve due to the advancement of innovative cardiovascular medical devices. In vitro and in silico models serve to replicate the in vivo environment for the development and testing of these devices prior to using animals for testing, and eventually humans in clinical trials. However, limitations related to these models exist in multiple areas including general, cardiac, and venous applications. Specifically, current gaps have been identified with customizable, tissue-mimicking phantoms (general), 2D Blood Speckle Imaging (BSI) (cardiac) and a bioprosthetic venous valve (venous). This dissertation focuses …

Examining The Effects Of Mental Health Barriers On Black Undergraduate Students Attending Predominantly White Institutions, Patrice N. Storey

Graduate Theses and Dissertations

Black college students are experiencing mental health issues at an alarming rate. There is, however, a reluctance among Black college students to seek assistance. There is a stigma surrounding mental health. An individual with a mental illness is often stereotyped as weak, uncontrollable, or paralyzed by demons. Historical incidents such as slavery, the Tuskegee Experiment, Jim Crow, and the forced sterilization of Black women have led the Black community to distrust the medical system. The stigma embedded in the Black community is passed down from generation to generation. This literature review examines existing research on Black students and their perception …

Impact Of Reducing Ammonia Concentration By Ozone Technology And Its Potential Improvement On Broiler Performance, Odilpio Quintana Ortega

Graduate Theses and Dissertations

The employment of ozone in livestock production as a means of mitigating ammonia is used for enhancing air quality within animal confinement facilities, such as swine or poultry barns. Ammonia is a byproduct of animal excrement. Elevated ammonia concentrations can adversely affect the well-being of both animals and humans. The aim of this thesis was to investigate the effects of Ozone Technology Machine Unit (OTMU) utilization in poultry barns regarding ammonia concentration and its potential benefit in terms of broilers performance and welfare. In recent years, there has been a significant boom in technological advances. New devices that help mitigate …

The Use Of Culturally Relevant Pedagogy In Esol Classes, Beth A. O. Haddinger

Graduate Theses and Dissertations

This dissertation is organized into five distinct chapters addressing multiple aspects of learning and engagement as it relates to English Language Learners (ELLs) in the classroom. First, the problem of practice is identified and explored. We, as educators, must look closely at instructional and systemic issues, actionable elements, broader strategies of improvement, and leverage, which refers to the ability of a program to motivate students and to generate a sense of practical value in academics. The next aspect of this dissertation proposal reviews the existing research literature. This literature review focuses on the specific learning needs of ELL students. Specifically …

3d Printed Microdialysis-Based Microsampling Probes, Patrick Pysz

Graduate Theses and Dissertations

This work will show the development of a fully 3D printed device platform in which a complex microsampling probe geometry is fabricated in a simple two-step process. This process includes the combination of 2-photon polymerization (2PP) and masked-stereolithography (MSLA). The cutting edge neurotechnology needed to monitor brain internal communication and will require multiple sensing modalities including temperature, pressure, electrophysiological, and optogenetics. Microsampling is an integrally important function for any future biosensing device platform as it allows for chemical delivery and unparalleled specificity through offline analysis of collection samples. Stereolithography (SLA) 3D printing has emerged as a powerful fabrication method capable …

Examining The Hormonal Underpinnings Of Affiliation Motivation In Oral Contraceptive Users, Hormonal Iud Users, And Naturally Cycling Women, Mikayla Tolliver

Graduate Theses and Dissertations

Affiliation is important for women during times of stress. Although, affiliation has been linked to women’s hormones across the menstrual cycle, many women use hormonal contraceptives which disrupt the links between hormones, psychology, and behavior. This study examined how hormonal contraceptives (hormonal IUD vs. the oral contraceptive pill) and menstrual cycle phase (follicular vs. luteal) are associated with affiliative motivations following the Trier Social Stress Test (TSST). Further, this study examined women’s cortisol reactivity and whether cortisol reactivity mediated affiliative motivation following the stressor. I found that oral contraceptive pill users projected more stress and rejection onto others’ faces and …

Exploring The Interrelationships Among Structural Complexity, Multi-Trophic Biodiversity, And Ecosystem Productivity In Forested Ecosystems., Ayanna St. Rose

Graduate Theses and Dissertations

Forests play a pivotal role in sustaining global biodiversity and mitigating the global climate, as they serve as the primary refuge for terrestrial biodiversity and effectively capture and store atmospheric carbon dioxide. However, changing climate and land use are altering the geographic distribution, physical structure, and productivity of forested ecosystems that can have profound impacts on biodiversity conservation, forest productivity, and global climate. This dissertation contributes to our understanding of multifaceted interactions between the physical and biological structural complexity and ecosystem functions in forested landscapes across the United states by using openly available data from two national networks: the National …

Evaluation Of Oxyfluorfen For Use In Roxy Rice, Casey Hunter Arnold

Graduate Theses and Dissertations

Mid-southern U.S. rice (Oryza sativa L.) producers are challenged every year to control problematic barnyardgrass [Echinochloa crus-galli (L.) Beauv.] and weedy rice (Oryza sativa L.) because they have evolved resistance to most labeled herbicides. Oxyfluorfen is a Herbicide Resistance Action Committee (HRAC)/Weed Science Society of America (WSSA) Group 14 herbicide that inhibits protoporphyrinogen oxidase within the plant. Currently, there are no HRAC/WSSA Group 14 herbicides labeled for barnyardgrass or weedy rice control in midsouthern rice production. Therefore, oxyfluorfen is being evaluated for barnyardgrass and weedy rice control. Plant breeders at the University of California – Davis were able to breed …

How Does Rolling Conformity Affect State Tax Revenue?, Tyler Johnson

Graduate Theses and Dissertations

Recent federal tax legislation has dramatically altered the landscape of state taxation. A product of this change is the increased interest in rolling conformity among corporate income taxing states. Under rolling conformity, states adopt federal tax provisions on a continual basis without the need for legislative approval. Despite its benefits, academic literature theorizes that rolling conformity is associated with several attributes that may negatively impact state budgets. I assess the merits of these concerns by examining the effect of rolling conformity on state corporate tax revenue. My results suggest that corporate tax revenue in rolling conformity states is more sensitive …

A Simulated Qualitative Study Exploring Higher Education Faculty's Perceptions Of Factors That Influence Dynamic Decision-Making When Choosing Opportunities For Student Engagement In Asynchronous Online Courses, Leticia De La Garza

Graduate Theses and Dissertations

The purpose of this study was to explore higher education faculty’s perceptions of factors that influence dynamic decision-making when choosing opportunities for student engagement in asynchronous online courses. More specifically, this study sought to understand how faculty in higher education perceived these factors to prevent and facilitate dynamic decision-making when designing instructor presence, student-to-student collaboration, and student-to-academic content engagement opportunities in asynchronous online courses, as Garrison et al. (1999) suggest, for a community of inquiry. There has not been much focus on the dynamic decision-making of online instructors in higher education and a call to continue exploring factors that influence …

Social Media And Mental Health: The Public Health Impact And Future Policy Directives, Renae A. Merrill

Graduate Theses and Dissertations

The relationship between social media use among young people and the increasing concerns of mental health problems in the U.S. and globally is on systemic agendas. Furthermore, research on social media use and mental health indicate reasons to suspect a causal relationship, but more work needs to be done. Therefore, this three-article dissertation seeks to explore (1) associations between social media use, personality, and depression; (2) associations between social media emotional support, anxiety, and personality; and (3) the relationship between social media use and mental health using Deborah Stone’s causal stories framework. Findings from this study provide an improved understanding …

A Generic Qualitative Inquiry Of The Challenges For Black African American Men Who Have Experienced Trauma, Randall Lee Maurice Shakir

Graduate Theses and Dissertations

Black African American Men (BAAM) suffer disproportionately from trauma related challenges and have a higher risk of encountering trauma across the lifespan. The negative impact of trauma is a major public health concern in the United States, evidence suggests trauma negatively impacts the physical well-being, mental health, and mortality rate. BAAM have increased rates of trauma exposure and their traumatic experience is historically complex involving a variety of contemporary issues (i.e. Adverse Childhood Experiences (ACEs), depression, victimization and desensitization, stress). This research aims to explore the complex nature of their trauma-related challenges among a purposeful sample of BAAM participants in …

From The Arab World To The United States Of America: The Wellness Of Arab Graduate Women Studying In The U.S., Mariam Mostafa

Graduate Theses and Dissertations

The pursuit of higher education symbolizes a profound and transformative journey, particularly for international students who embark on the path of studying abroad. This dissertation undertakes an in-depth exploration of the well-being of Arab women pursuing their graduate studies in the United States (US), emphasizing four crucial dimensions of wellness: social, mental/emotional, physical, and financial well-being. Employing a qualitative research methodology, this study delves into the multifaceted experiences of this specific student population and investigates how these experiences impact them. Through a series of interviews and rigorous qualitative analysis, we illuminate the distinct challenges and opportunities that Arab graduate students …

In Vitro And In Vivo Evaluation Of Antimicrobial Activity, Oocyst Sporulation Rate, Oocyst Integrity And Oocyst Infectivity In Eimeria Maxima M6 Oocyst Suspensions Treated With Chlorhexidine Salts In Comparison With Potassium Dichromate, Lauren Laverty

Graduate Theses and Dissertations

Eimeria species oocysts cause coccidiosis, one of the costliest diseases in the poultry industry. Coccidiosis infections cause significant economic losses due to reduced performance in chickens and turkeys. The objective of this thesis was to determine fecal bacterial recovery from chlorhexidine (CHX) salt suspensions containing Eimeria maxima M6 oocysts and evaluate the effect of CHX salts on oocysts during long-term cold storage. For bacterial recovery experiments, CHX digluconate and CHX gluconate were tested at different concentrations on poultry fecal slurries during oocyst shedding. Eimeria maxima M6 oocysts were evaluated in CHX salt suspensions to test the effect on oocyst degradation …

Human-Bat Interactions In A Disease Emergence Hotspot: Implications For Human Health And Bat Conservation, Reilly Tempest Jackson

Graduate Theses and Dissertations

Bats are an ecologically important taxon that can host zoonotic pathogens. Globally, many bat species are synanthropic and live closely with humans, often roosting in man-made structures. The spatial overlap between humans and bats creates opportunities for human-bat contact, which can lead to human exposure to bat-borne pathogens and conflicts that cause bat mortality. Despite this risk, little is known about the drivers and characteristics of these human-bat interactions in buildings and work is needed to understand this aspect of the wildlife-urban interface. In Chapter I, I present a literature review that identifies the geographic and taxonomic trends in reported …

Evaluating Garment Fit Perception For Pregnant Women During 1st, 2nd, Or 3rd Trimesters, Nelima Zipporah Barasa

Graduate Theses and Dissertations

During pregnancy, women experience diverse physical body changes as the pregnancy progresses through different periods. It has been noted that anthropometric changes occur during pregnancy in a non-linear manner and can be measured using 3D body scanners at various stages of pregnancy. The changes are diverse, and impact pregnant women's garment fit differently as the pregnancy progresses through each trimester. Pregnant women have experience in dressing their pre-pregnant bodies in stylish garments and would similarly want to dress fashionably when pregnant. This has led to the need for garments that can accommodate body changes comfortably and fashionably without losing the …

Age, Size, And Composition Of Selected Old-Growth Shortleaf Pine Stands In The Upper Buffalo River, Arkansas, Willa Avery Thomason

Graduate Theses and Dissertations

Shortleaf pine (Pinus echinata) approaches the westernmost limits of its range in the Arkansas Ozarks. Despite heavy logging of shortleaf pine throughout its range during the 19th and 20th centuries, the species was not easily accessible for harvest and transportation in the most rugged areas of the Boston Mountains and, as a result, there are a few extant stands of old-growth shortleaf pine in the region. The shortleaf pine stands in the interior Boston Mountains are unusual in that they exist primarily above bluff lines at topographic breaks in the hardwood canopy and are not disturbed by fire as frequently …

Effect Of Onion Peel Bioactive Compounds On Gut Microbiome Of Obese Adults, Saad Al-Din Sifat

Graduate Theses and Dissertations

Obesity, a pervasive global health concern, involves a complex interplay between genetic factors, dietary patterns, and the gut microbiota. Onion peels are rich in polyphenols and known for their antioxidant properties. However, the effects of in-vitro digested onion peel extract has not been investigated thus far. This study therefore assesses the effects of digested bioactive compounds from onion peels, emphasizing gut microbiota shift and metabolites. Onion peel extract (OPE), digested onion peel extract (DOPE), and solid-phase-extracted digested onion peel extracts (SPE-DOPE) were analyzed for total phenolic content (TPC) and antioxidant activity. SPE-DOPE exhibited the highest TPC and antioxidant activity. Fecal …

Health Beneficial Effects Of Black Raspberry, Blueberry, And Blackberry Volatile Extracts In Lung And Colon, Inah Gu

Graduate Theses and Dissertations

Berries are one of the most consumed fruits in our diet, and rich in dietary fiber, vitamins, minerals, polyphenols, and volatiles. Volatiles are responsible for the aroma of berries, and are widely used in food, perfumery, and cosmetic industries. However, the potential health beneficial effects of berry volatiles have not been extensively studied. Recently, we found that berry volatiles from cranberries, black and red raspberries, strawberries, blueberries, and blackberries have an anti-inflammatory effect on inflamed murine macrophage cells. Since inflammation can develop into many chronic diseases, and berry volatiles can be inhaled or consumed and pass through the lungs or …

Solar Cooking Solutions For Haiti, Isaac Mergner

Graduate Theses and Dissertations

This study focuses on enhancing the efficiency of solar cooking through the use of solar cookers and heat retention boxes. The research involved testing various cooking vessels and lids in a solar cooking experiment, with a specific focus on the performance of different materials and their heat retention capabilities. The experiment aimed to increase the efficiency of solar cookers, which are popular in developing nations due to their relatively low cost. The findings indicate that the combination of a solar cooker and a heat retention box can significantly improve the cooking process, particularly in areas with limited access to cooking …

The Effects Of Probiotics And Environment On The Swine Gut Microbiome, Bin Zuo

Graduate Theses and Dissertations

The gastrointestinal tract is crucial for nutrient absorption and immune system functionality. It employs a synergistic approach, merging physical and biochemical defenses, to counteract pathogens that enter through dietary or other external routes. This system also facilitates the breakdown of complex carbohydrates, a process beyond the host's innate capacity. In swine, gut microbiota early colonization plays a significant role in several physiological developments, shaped by a variety of determinants including maternal factors and environmental conditions. In the swine industry, the shift to indoor pig farming enhances efficiency but limits soil interaction, potentially impacting gut microbiota diversity. Additionally, the practice of …

Dentistry And The Law: Requiring Proof Of Adoption/Retaining Orthodontic Models, Dan Schulte Jd

The Journal of the Michigan Dental Association

In this Dentistry and the Law column, a dentist seeks guidance on handling a situation where racial differences between a child and an accompanying adult raised concerns during an examination, leading the dentist to request proof of adoption. The response clarifies that asking for proof of adoption is not illegal, citing relevant Michigan adoption statutes. The column advises adopting an office policy, emphasizing human trafficking training. Additionally, a dentist inquires about retaining orthodontic models and X-ray films. The answer recommends assuming orthodontic models are part of dental records, subject to a 10-year retention period. Patients can be given their models, …

Endodontic Therapy, Crown Amputation, And Soft Tissue Advancement To Treat A Hopeless Tooth, Timothy Daws Dds, Thomas Bolten Dds, Md

The Journal of the Michigan Dental Association

Managing patients with a history of intravenous bisphosphonates and antiresorptive medications poses challenges in clinical decision-making. Extractions are generally discouraged in these patients due to the risk of medication-related osteonecrosis of the jaw (MRONJ). This case study presents an 89-year-old female with metastatic breast cancer on Xgeva, facing a non-restorable tooth (#30). A collaborative approach involving the general dentist, endodontist, and oral surgeon employed endodontic therapy, crown amputation, and soft tissue advancement, avoiding extraction. The technique, akin to coronectomy, mitigates MRONJ risk by preserving bone integrity. Follow-up assessments indicate successful treatment without complications, highlighting the efficacy of this approach in …

J Mich Dent Assoc December 2023

The Journal of the Michigan Dental Association

Every month, The Journal of the Michigan Dental Association brings news, information, and features about Michigan dentistry to our state's oral health community and the MDA's 6,200+ members. No publication reaches more Michigan dentists!

In this issue, the reader will find the following:

• A cover story on “New Dentists’ Most Asked Legal Questions”
• A case report on “Endodontic Therapy, Crown Amputation, and Soft Tissue Advancement to Treat a Hopeless Tooth”
• A feature “Be a Leader in Your Practice: What’s Your Style?”
• 2023 Author/Title Index to the Journal of the Michigan Dental Association
• News you need, a Guest Editorial and regular …

Assessing Stereotype Content And Accuracy Of The Poor: Interpersonal Warmth And Social Competence Dimensions, Shiza Shahid

Master's Theses

The present study assessed (a) the stereotype content of poor people among the poor and the non-poor by using implicit and explicit measures and (b) how these stereotypes map onto actual traits of the poor (i.e., stereotype accuracy). Experiment 1a assessed the stereotype of interpersonal warmth associated with the poor in the non-poor individuals using the Single Category Implicit Association Task (SC-IAT) and stereotype rating questionnaire. Participants also completed the interpersonal warmth inventory. Poor participants completed the SC-IAT, stereotypes ratings, and interpersonal warmth inventory to assess the stereotypes and stereotype accuracy (Experiment 1b). In Experiment 2a, I recruited non-poor participants …

An Exploration Of Symptom Severity And Suicidal Ideation Within A Sex Addiction Sample, Emily A. Cordova

Master's Theses

Currently sex addiction is not recognized as a mental disorder in the DSM-5-TR, yet it continues to negatively affect a significant number of people annually. The following study aimed to explore the relationships between sex addiction, attachment styles, and suicide-related behavior, and other psychopathology related symptoms as measured by the MMPI-3. Using data from the MMPI-3, the Sexual Dependency Inventory-4^th Edition, the Sexual Addiction Screening Test-Revised, and the Experiences in Close Relationships Scale-Revised, this study explored the relationship between attachment style and sex addiction symptoms, suicidality, and sex addiction severity in a sample of 222 men seeking treatment for …

An Exploration Into Health Equity Discourse In Mississippi: Organizational Commitments And Practitioner Perspectives, Thuy-Vy Lillian Pham

Honors Theses

This thesis takes a sociological approach to examine healthcare workers' beliefs and medical organizations’ solidarity statements related to diversity and equity and how these discourses aligned and/or diverged. Through interviews with healthcare providers in Mississippi and content analysis of solidarity statements, the study finds that discussions on health disparities more frequently addressed socioeconomic inequality rather than systemic racism, diverging from organizational statements. This emphasis may partly stem from the demographics of the study participants, who were predominantly White—which also reflected the staff where they worked. Additionally, while healthcare workers recognized structural issues related to health disparities, they often showed hesitancy …

Diver Perceived Value And Satisfaction On The Mississippi Gulf Coast, Ka'lon Duncanson

Honors Theses

The Mississippi Gulf Coast is known for its coastal beauty and the tourism that comes from the recreational activities associated with the water. However, there appears to be an underserved segment of the tourism industry. The coast provides opportunities for local scuba divers to take part in a range of diving activities, but there is minimal support for this tourism activity in Mississippi. There is a need for greater understanding about what local divers value in their diving experiences and how this might lead to greater satisfaction with this activity. Along with overall perceived value, the argument is made that …

Investigating The Relationship Between Consistent Workout Regimen On Quality Of Life Among Crossfitters In South Mississippi, Christian Glass

Honors Theses

Robust literature exists to support the utility of CrossFit in improving metabolic and cardiovascular well-being. However, a metaphorical chasm exists not in the study of the physiological effects of CrossFit but in the psychological effects, namely quality of life (QOL). This thesis aimed to offer an installment into this gap by investigating trends among a population of 81 CrossFitters in south Mississippi. To best fulfill this task, a quantitative study was conducted using a 32-item survey composed of a mixture of questions from the World Health Organization Quality of Life Brief Version (WHOQOL- BREF) to assess reported quality of life …