Digital Commons Network^™

Development Of Vegetable Oil-Based Nano-Lubricants Using Ag, H-Bn And Mgo Nanoparticles As Lubricant Additives, Kollol Sarker Jogesh

Theses and Dissertations

Because of the harmful impact of petroleum-based lubricant on the environment and human body, vegetable oil-based lubricant with eco-friendly nanoparticles has a great potential to be an alternative lubricant if it possesses proper lubricating properties. In this study, thermal conductivity, viscosity and tribological properties (wear scar diameter and coefficient of friction) of vegetable oil-based nanolubricant, developed from soybean oil and sunflower oil, modified with Ag, h-BN and MgO nanoparticles as lubricant additives, were evaluated. For thermal conductivity evaluation, a line heat source method was used with KD2 Pro-Thermal Property Analyzer. For viscosity evaluation, Haake Mars 40-rheometer was used to evaluate …

Influence Of Pretreatments On Physiological Status And Post-Planting Survival Of Thornforest Seedlings In A Restoration Context, Douglas E. Mainhart

Theses and Dissertations

Semi-arid ecosystems across the globe have faced land conversion posing a threat to the important ecosystem services they provide. Revegetation-centered restoration efforts in arid regions have low success due to limited water availability and higher temperatures. Typically, practitioners utilize methods that modify field conditions around seedlings to mitigate these stressors. I evaluated the efficacy of in-nursery treatments to improve plant water status. Three pretreatments were applied: elevated CO2, drought hardening, and an antitranspirant foliar spray. My goal was to understand how these pretreatments would impact survival and growth in the field and what physiological traits they altered. Elevated CO2 and …

Exploring The Interpersonal, Leadership, And Organizational Factors Related To The Burnout Of Bilingual, Latinx Professional School Counselors [Explorando Los Factores Interpersonales, De Liderazgo Y Organizacionales Relacionados Con El Agotamiento De Los Consejeros Escolares Profesionales Bilingües Y Latine], Crystal Marie Prado

Theses and Dissertations

This study explored the relationship between interpersonal competencies, educational leadership styles of campus principals, organizational practices, and the burnout of professional school counselors (PSCs). A mixed-methods research design was utilized to examine the correlation between identified predictor variables and the level of burnout as measured by the five dimensions of the Counselor Burnout Inventory (CBI; Lee et al., 2007), the three subscales of the Maslach Burnout Inventory: Educators Survey (MBI-ES, Maslach et al., 1986), and personal narratives documenting the participating PSC's most significant professional experiences. The investigation included 100 bilingual, Latinx PSCs from four urban/suburban school districts of border towns …

Incorporating Native Plants In Insectary Strips To Promote Insect Diversity And Below-Ground Beneficial Microbes In South Texas, Lindsey N. Richards

Theses and Dissertations

Farm edges are generally the most undisturbed areas in a farm with diverse vegetation and can enhance agrobiodiversity and provide crucial food and shelter for wildlife, insects, and soil biota. Planting native wildflowers with the ability to reseed and withstand local climatic conditions for semi-permanent vegetation around farm edges or in between crops has potential to biologically control pests. To test this, we ran a two-year study and installed three different flowering insectary strips on a certified organic vegetable farm in South Texas during the winter season. The treatments were: 1) a commercially sourced 17-species native wildflower seed mix; 2) …

To Stay Or Leave: Commitment Decisions Of Early-Career Faculty, Kevin Moberg

Theses and Dissertations

While tenure-track job options have been decreasing in higher education, tenure remains one of the most influential variables in the faculty reward structure. This research project aimed to understand the experience of organizational commitment of early-career tenure-track faculty members prior to earning tenure. Particularly, the project investigated which factors such faculty members considered to be important when deciding to remain at or leave their university and how they applied their meanings of those factors in their decision making process of whether to commit to their institution of employment. The qualitative data for this project were collected through in-person interviews with …

The Effects Of The Alpha1a Adrenergic Receptor In Modulating Psychiatric Symptoms, Jason Power

Theses and Dissertations

The adrenergic system plays a key role in the treatment and understanding of the etiology of mental illnesses. Despite antidepressants having the effect of reducing the reuptake of specific neurotransmitters, such as norepinephrine (NE), the mechanism of the antidepressant effect is poorly understood. It is apparent that antidepressants increase the rate of neurogenesis occurring within the hippocampal region of the brain with the hippocampus found to have an increased density around the time of symptom improvement (rate plateaus after 4-8 weeks after treatment). With an increased rate of neurogenesis taking ~1 month to occur, it was hypothesized that treatment with …

The Language Of Recruitment: How Minority Status, Racial Minority Centrality, & Linguistic Cues Impact Applicant Perceptions, Clark Waters

Theses and Dissertations

As color-blindness, the intentional denial of racial differences, continues to occupy corporate policy, expressions and consequences of modern racism in the workplace remain pervasive. Color-blind attitudes can be harmful due to their focus on perceived equality, at the expense of actionable, functional equity. Establishing a culture of racial equity in the workplace requires an understanding of how the language used to discuss race can impact potential applicants’ opinions of the company. To attract a diverse pool of job applicants, the language of recruitment is of particular importance in the current study. Using a vignette-style survey design, a diverse sample of …

Analysis Of Proposed Active Radiation Shielding Design Concept For Spacecraft, Claire Mechmann

Theses and Dissertations

A need exists to protect the crew of interplanetary spacecraft from lethal doses of Galactic Cosmic Radiation (GCR) and Solar Energetic Particles (SEPs). As plans progress to send humans beyond lower Earth orbit (LEO) and outside of Earth’s protective magnetosphere, agencies involved in this endeavor find themselves confronted with the obstacle of shielding the crew from this harmful radiation. A proposed active shielding concept design has been suggested, utilizing charged dielectric capacitors to deflect incoming charged particles. This analysis will examine the feasibility of the proposed design and offer potential materials useful for application. The results should prove informative for …

Employment Transitions From Active-Duty Army Officer To Civilian: An Exploration Of The Knowledge, Skills, And Abilities Possessed By Combat-Experienced, Army Field-Grade Officers, James Daniel Crook

Theses and Dissertations

Two decades of wars in Iraq and Afghanistan have concluded, bringing an end to the longest military conflicts in the history of the United States of America. Following the example of post-war history, the military’s posture is to reduce personnel end-strength. The post-war military requires fewer soldiers, and a significant number of transitioning officers make the journey from military to civilian employment. This quantitative study discovered the knowledge, skills, and abilities of combat-experienced, active-duty, Army field-grade officers and explored the change from military to civilian employment. This study addressed the gap in the literature regarding this specific group of transitioning …

Importance Of Light Activation For Plant Cryptochrome And Antibacterial Drug Delivery Strategies, Merfat Ahmed Hammad

Theses and Dissertations

The goal of this project is to investigate the benefits of applying light in different systems. In the first part, the magnetoreception process that occurs in the light activated cryptochrome of Arabidopsis Thaliana was investigated. In the second part, photo-carbon monoxide releasing molecules (photo-CORMs) were investigated for their antibacterial effect to develop biomedical strategies. Overall, this has been achieved in three different studies. The first study investigated if the forward lightdriven reaction is involved in the magnetoreception process or not in cryptochrome (CRY). To accomplish this, the plant seedlings were tested for 90 minutes as follows: 5 minutes in the …

How Well Do Your Family Members Know You? The Relationship Between Informant Report And Cognitive Performance Of Older Adults, Mairy Yousif

Theses and Dissertations

Introduction: Given the clear impact and prevalence of dementia on the aging population, there is a need for greater research and understanding in this area. As the dementia progresses, medical providers rely heavily on caregiver and family member reports of the patient’s functioning and other aspects of their care. Therefore, it is important to know how accurate caregivers and family members are in judging their loved ones’ cognitive and physical strengths and weaknesses. This study aims to expand upon these previous studies by comparing caregiver/collateral reports of cognitive and functional status on the DSRS to neuropsychological tests and an objective …

Design And Optimization Of High-Power Density Permanent Magnet Motor With Integrated Cooling For Aircraft Propulsion, Aravindakshan Thirumalai Ananthanpillai

Theses and Dissertations

There is a critical need for the electrification of transportation systems. While power density required for ground-based vehicles can, to some extent, be met by current off-the-shelf motors and generators, aircrafts require significant improvements both in terms of power density and efficiency. The concept relies on the tight integration of a high-power density dual-rotor permanent magnet motor, high power density SiC power converters, and a shared closed loop cooling system rejecting the heat in the propulsion ducted fan air stream. The motor is based on a dual-rotor configuration using permanent magnets forming ideal Halbach arrays allowing for high magnetic loading …

The Effect Of Zonation, Biofouling, And Corrosion Products On Cathodic Protection Design For Offshore Monopiles, Caglar Erdogan

Theses and Dissertations

Cathodic protection (CP) is required to prevent corrosion of the submerged steel for offshore wind monopile foundations in the marine environment. The design of these systems depends on the environmental conditions, including temperature, salinity, pH, dissolved oxygen, depth, micro- and macro-organisms, and water flow rates. The standards utilized to design cathodic protection systems consider only some of these conditions. This research identified the gaps in knowledge for the design of corrosion prevention systems for offshore wind monopile foundations and investigated the changes in cathodic current densities due to macro-galvanic cells, fouling communities and corrosion products established on uncoated vertical steel …

The Relationship Between Hallucinations And Visuospatial Impairment Among Individuals With Dementia, Ruta Sohoni

Theses and Dissertations

Objective: This study examines the neuropsychological functioning, specifically using the Hooper Visual Organization Test (VOT), to understand the impact of hallucinations on the level of impairment in the visuospatial domain.

Method: Archival data obtained over three years from a total of 73 patients from the Health First Memory Disorder Clinic was used in this study. Participants were included in the study if they endorsed experiencing hallucinations, were given the VOT during their brief neuropsychological evaluation, and were diagnosed with dementia or unspecified neurocognitive disorder. The patient’s electronic medical record was used to retrospectively gather additional details regarding their hallucinations and …

Interconnected Precarity: A Contemporary Reframing Of Bodily And Earthly Health In Wendell Berry's The Unsettling Of America: Culture And Agriculture, Abigail Pinegar

Theses and Dissertations

Published in 1977, Wendell Berry's book The Unsettling of America: Culture and Agriculture gained widespread popularity. More than half a century later, many of the notions of the body and the earth presented in its seventh chapter, "The Body and the Earth," remain relevant and important for environmental discourse today. Berry's discussion of the body and the earth examines their mutuality and codependence from an ontological, theological, agricultural, and even biological perspective. The coupling of this text with Judith Butler's, Frames of War: When is Life Grievable? contemporizes his argument through its more socio-political and philosophical claims regarding life and …

Understanding Elementary Classroom Teachers’ Knowledge Of Vocabulary Development And Practices For Teaching Vocabulary To Students From Low-Income Backgrounds, Adria Waters

Theses and Dissertations

The link between vocabulary knowledge acquisition and its effect on reading comprehension has been well established over years of research, however, students from lowincome backgrounds may have less access to the opportunities that allow for the building of this vocabulary knowledge prior to and including entry into formal schooling. Therefore, it is necessary to develop more equitable opportunities for learning and practice in literacy. It is important to begin to understand what teachers currently know and understand about how vocabulary develops and how to best teach it. A nationwide survey collected data about Title I elementary classroom teachers’ knowledge of …

Reference Genome Coverage Based Approach For Whole Shotgun Metagenomic Analysis, Daniel Asare Acheampong

Theses and Dissertations

Advancement in metagenomic sequencing technologies have led to a tremendous improvement in public health through the identification of microbial organisms in their natural environment and the role they play. Developments in second and third generation sequencing technologies have contributed immensely to the increase in prokaryotic and eukaryotic reference genomes. Alignment of metagenomic reads to all these reference genomes in the quest to identify the microbial organism present in the sample could be computationally expensive and time consuming, thus the need for a more quick and accurate taxonomic classifiers that can aid in the fast identification of these organisms. Construction of …

Comparative Metabolites Profiling Of Sesamum Indicum Seeds In Context Of Their Origin, Processing And Biological Activity Using Bioinformatics Tools, Bishoy Fayez Abib

Theses and Dissertations

Sesame (Sesamum indicum), is a significant oilseed crop with great economical and nutritional value, encompassing a plethora of primary and secondary metabolites that exhibit pharmacological and therapeutic merits. The present study, using untargeted comparative metabolomics, aims to authenticate and classify sesame seed accessions from different countries of origin i.e., Egypt, Sudan and Nigeria, based on their metabolite variations and in relation to their biological activity and nutritional value such as mineral content. Also, to further assess the impact of processing on sesame’s nutritional value and biological activity using the industrial production of sesame paste as a case study. To achieve …

Women In Politics: An Examination Of Hispanic Undergraduate Students' Perspectives And Attitudes, Saliha Garcia

Theses and Dissertations

The lack of female representation in politics has long been established, as over the years there has been a rise in political participation that still fails to be representative of the general population. Women that seek positions in office often fail to garner the support that many male candidates quickly get, as women face gender stereotypes and sexism at almost every turn. Many studies have failed to look at how the Hispanic population evaluate women seeking political leadership and how engrained gender roles and stereotypes are when it comes to the evaluation of female and male candidates. This thesis examines …

The Second Watcher At The Gate: Local Newspaper Framing Of Refugees, Asylum Seekers, Immigrants, And Migrants At The Border In The Age Of Covid-19, Gabriel Rodriguez

Theses and Dissertations

The COVID-19 pandemic caused a repeat of a historical association between migrants and disease with the re-activation of Title 42, which gave the federal government the power to bar and expel migrants and asylum seekers without the opportunity to contest their expulsion, under the basis of public health. Based on a content analysis of the frames employed in the coverage of the pandemic by five newspapers located on the southern U.S. border for the period of 2020 to 2021, this study explored how these English-language newspapers gave priority to as sources, how they framed immigrants and immigration issues during the …

A Qualitative Investigation Into The Academic Advisors’ Perceptions Of Best Advisement Practices, Tracy Crowder Mitchell

Theses and Dissertations

This study aimed to better understand academic advising by examining the perspectives of academic advisors at a Georgia Research 1 institution located in a large city. Initially, the purpose of this case study was to learn more about how academic advisors view effective strategies for boosting their students' performance. Nine academic advisors from a multi-campus institution in the southeastern United States were interviewed for this qualitative study. The participants were asked to complete 30 to 60-minute interviews with the researcher. By evaluating the personal responses used throughout the study, the researcher could identify frequent themes during data collection and analysis. …

A Qualitative Exploratory Case Study Of Middle School Administrators’, Counselors’, And School-Wide Positive Behavior Interventions And Supports Team Leaders’ Perceptions Of School-Wide Positive Behavior Interventions And Supports, Ginette E. Bartlett

Theses and Dissertations

Students' disruptive behavior has become more customary over the last several years. Many school systems have implemented a Positive Behavior Interventions and Supports (SWPBIS) approach to deal with these behaviors proactively. This particular study is focused on behaviorism and operant conditioning. A qualitative exploratory case study design was chosen as the most effective method to understand perceptions of the implementation of the SWPBIS framework in a middle school setting. The three data sources include structured focus groups with school administration, counselors, and SWPBIS team members. Additionally, school climate surveys from 2016-2021 and school discipline referrals from 2016-2021 were evaluated. During …

Understanding Effect Of Ionic Liquid On Metalloproteins: Laccase And Azurin, Aashka Y. Patel

Theses and Dissertations

Interactions between ionic liquids and biomolecules have been of great interest due to the intrinsic properties of ionic liquids and the flexibility to mix and match cations and anions to create unique ionic liquids. A number of ionic liquid-biomolecule studies have focused on the interactions with proteins, including industrially relevant enzymes. One of these, laccase from Trametes versicolor, is a naturally derived enzyme used in the breakdown of phenolic compounds in a wide variety of industries, especially useful in breakdown of lignocellulosic materials. Here, a combination of experiments and molecular dynamics (MD) simulations were used to investigate the interactions …

A Mixed Methods Examination Of The Relationship Between Workload, Job Satisfaction, And Burnout On Faculty Quitting Intentions At Public, Associate Degree Granting Institutions In Georgia, Amy Fenech Sandy

Theses and Dissertations

Increased budgetary constraints for postsecondary institutions may lead to increased workloads for full-time faculty members. Previous studies have shown that a negative relationship exists between workload and job satisfaction, which may lead to faculty burnout and increased faculty turnover. Identifying factors associated with faculty job satisfaction and burnout and understanding and predicting faculty intent to leave is necessary for the retention of qualified faculty and proper functioning of postsecondary institutions. The theoretical framework that was the basis of this research was Herzberg’s Theory of Motivation, which states that certain factors must be in place to prevent job dissatisfaction from occurring. …

The Development Of A Genomic Toolbox For Studying The Evolutionary Genetics Of Reptilian Lungs Using The Chicken Model, Logan Thomas Edvalson

Theses and Dissertations

There is a vast diversity in tetrapod lung branching morphology. Phylogenetically, much of the pulmonary diversity among vertebrates appears to arise from the way epithelial tubes branch or form saccular (cyst) structures. Fgf10 activity has been shown to play a critical role in regulating branch versus cyst morphology. We hypothesize that the species-specific differences in lung morphology may be primarily due to species-specific differences in Fgf10 expression. To test this hypothesis, we have performed bioinformatic analyses on the Fgf10 locus and have identified a conserved 11 kb noncoding region that potentially contains the Fgf10 lung enhancer. We are taking a …

The Impact Of Transformational Leadership On Postsecondary Student Affairs Division Employee Job Satisfaction, Commitment, And Engagement, Valerie Edwards Richardson

Theses and Dissertations

Leadership is a transformational process that moves followers to achieve more than is usually expected of them. Research has shown that transformational leadership positively impacts and inspires job satisfaction, organizational commitment and employee engagement among academic lecturers and student populations. But little research has explored the impact of these constructs within the context of non-academic, lower level support staff in higher education. The purpose of this study was to explore the impact of Transformational Leadership characteristics on the perceptions of lower level, support staff’s job satisfaction, organizational commitment, and work engagement in a technical college in Southwest Georgia. The target …

Administrators’ And Teachers’ Perceptions Of The Effectiveness Of The Pbis Framework In Title I Elementary Schools In A Middle Georgia County, Karen A. Phillips

Theses and Dissertations

This study examined the perspectives of administrators and teachers on the effectiveness of the PBIS framework in Title I elementary schools. This paper reviews the history of the discipline in schools in America and how student behavior has evolved. It includes an overview of social-emotional programs and discusses the need to incorporate them into the school day. The focus was on the PBIS framework in a specific middle Georgia county. Results were obtained through the analysis of the PBIS Self-Assessment survey and semi-structured interviews. Overall, the findings discovered that there was no statistically significant difference in the perceptions of elementary …

Parents’ Right-Wing Political Conservatism And Trans Teacher Bathroom Access In School: Ambiguity Is Threatening, Aaron F. Neitzel

Theses and Dissertations

In the past several years, hundreds of legislative bills introduced across the U.S. have targeted transgender persons, including restricting bathroom use to one’s natal sex (Dey & Harper, 2022; Samar, 2016). Few studies have examined the public’s perceptions of transgender persons in schools accessing bathrooms that align with gender identity, rather than natal sex. This study focused on how three conservative, prejudicial political ideologies (i.e., Right-Wing Authoritarianism, Social Dominance Orientation, Need for Closure; see Jost et al., 2003) influenced the responding of parents of school-aged children when presented with a scenario regarding a hypothetical transgender woman P.E. teacher accessing the …

An In Silico Study Of The Delta Opioid Receptor Using Small Molecules, Emily Dean

Theses and Dissertations

The DOR is the least studied out of the three opioid receptors (Mu, Kappa, and Delta). The most is known of the Mu Opioid receptor (MOR) and the drugs that target it have led to the global opioid epidemic due to their adverse effects of tolerance and addiction. The DOR is not known for the same adverse effects and therefore, is a promising pharmacological target for the development of new opioid ligands. In this thesis, molecular modeling, simulations and other computational methods are introduced in Chapter 1 where these methods are used to study the activation mechanism of DOR (Chapter …

Investigation Of Flexible And Wearable Devices For The Analysis Of Biological Signals, Muhammad Usman

Theses and Dissertations

The application potential for flexible and wearable electronics in the field of healthcare has received great interest in recent years. Flexible and wearable devices based on soft, biocompatible materials can be comfortably attached to the human skin for continuous health monitoring. In this work, we present two novel wearable bioelectrical impedance analysis (BIA) systems for body composition measurement. First, we developed a wearable ring-based BIA system for body fat monitoring. The wearable ring contains flexible copper electrodes to interface with the human body. The device is tested on 40 healthy volunteers and the results demonstrate a high correlation with an …