Digital Commons Network^™

Hydroamidation With Acetamides And Trifluoroacetamides, Gordon H. Whitetree

College of Graduate Studies: Theses & Dissertations

The hydroamidation reaction is an attractive methodology for the construction of larger functional molecules. In our research, a baseline reactivity was established for the hydroamidation reaction using a set of N-alkyl and N-aryl (trifluoro)acetamides with methyl acrylate and acrylonitrile, various bases and varying reaction conditions. The combination of alkenes, acetamides, and trifluoroacetamides with base was crucial for reaction rate. N-aryl trifluoroacetamides exhibited near quantitative conversions in neat alkene with Diazabicycloundecene (DBU) as base. The less acidic N-aryl acetamides performed much faster in the presence of KOtBu and conversions of >95% were accomplished regularly but contained a large presence …

Unobtrusive Assessment Of Student Engagement Levels In Online Classroom Environment Using Emotion Analysis, Sasirekha Anbusegaran

College of Graduate Studies: Theses & Dissertations

Measuring student engagement has emerged as a significant factor in the process of learning and a good indicator of the knowledge retention capacity of the student. As synchronous online classes have become more prevalent in recent years, gauging a student's attention level is more critical in validating the progress of every student in an online classroom environment. This paper details the study on profiling the student attentiveness to different gradients of engagement level using multiple machine learning models. Results from the high accuracy model and the confidence score obtained from the cloud-based computer vision platform - Amazon Rekognition were then …

Southern Ways: One Girl’S Experience With Physical Abuse, Sexual Abuse, And Neglect, Merry Trammell

College of Graduate Studies: Theses & Dissertations

This autobiographical inquiry will explore my own experiences with physical abuse, sexual abuse, and neglect. Using the method of currere as a lead theory. The four-step process – regressive, progressive, analytical, synthetic – helped me work towards understanding the parts of myself affected by these traumas. Investigation of my own family’s generations of abuse as well as reflecting on these experiences helped me deconstruct my own story as I search for my own meaning and purpose. This study utilized aesthetics, depth psychology, and place as central themes in this work. I learned the valued of active imagination and the role …

Cultures And Colonization In Tamora Pierce's Young Adult Novels, Jessica R. Dube

College of Graduate Studies: Theses & Dissertations

The content represented in young adult literature can be a shaping force for adolescents as they begin to understand more about themselves and the world around them. Fantasy fiction is especially powerful, as it allows readers to consider issues outside of their own experiences and learn through the characters of a fictional world. This thesis focuses specifically on the works of Tamora Pierce, and the ways in which she represents sociopolitical issues in her fictional world of Tortall. I analyze the ways in which Pierce’s works fulfill Landt’s standards of good multicultural literature, and how the representation she presents can …

New Results On Cyclic Compositions And Multicompositions, Silvana Ramaj

College of Graduate Studies: Theses & Dissertations

Integer compositions, cyclic compositions, and lately k-compositions, are an important topic in combinatorics and number theory. In this paper, we will explain, the general approach of using generating functions to study number sequences involving compositions, cyclic compositions, k-compositions, and the number of parts in each of them. After generating the data, some properties are observed and proved. Also, some interesting bijections involving Pell numbers and the Jacobsthal sequence are given.

Assessing Short-Term Microalgal Community Responses Over Altering Hydrological Conditions In Experimental Wetlands Of Costal Georgia, Maggie M. Kuhn

College of Graduate Studies: Theses & Dissertations

Wetlands provide valuable ecosystem services such as nutrient cycling and carbon storage. Microalgae (i.e., diatoms) provide the foundation of primary production and determine rates of energy transfer throughout the system. Climate change models predict an increase in frequency of intense storms and severe drought conditions that pose a threat to known hydrological regimes and wetland ecosystem stability. The purpose of my study was to assess the effects of water permanence (i.e., duration of flooding) on diatom community structure in experimental wetlands. I predicted that wetlands with prolonged periods of flooding (i.e., permanent) would harbor a consistent diatom community throughout flooding …

Languages, Cultures, And Identities: Cross-Cultural Experiences Of Hbcu Students In A Study Abroad Program In Costa Rica, Irina M. Tedrick

College of Graduate Studies: Theses & Dissertations

The goal of this dissertation was to illuminate how an immersive study abroad program enabled my Black and African American Historically Black Colleges and Universities (HBCU) students to have meaningful language acquisition, cultural exploration, and identity expansion experiences. The methods used in this research reflect the qualitative narrative nature of the cross-cultural narrative inquiry (He, 2003, 2006, 2010; Phillion & He, 2008; Phillion et al., 2009; Sharma & Phillion, 2021). Thus, to accurately capture the participants’ stories, I employed a variety of methods, gathering data through semi-structured interviews and the collection of personal artifacts, such as journal writings, pictures, and …

Culturally Contested Curriculum? African American Students And Classical Education, Mary E. Negley

College of Graduate Studies: Theses & Dissertations

This dissertation is a series of speculative essays that explore the intersections of classical education, African American education, and culturally responsive/relevant/sustaining pedagogy. For centuries, classical education dominated the educational scene, and even today many people consider it to be a paragon of learning. However, it contains elitist and outdated ideas. By recognizing the miseducation of Blacks in the United States and exploring the educational journeys of four prominent African Americans: Marva Collins (1936-2015), W. E. B. Du Bois (1868-1963), August Wilson (1945-2005), and Carter G. Woodson (1875-1950), I explore possibilities that classical education can be culturally empowering for African American …

Using Zebrafish (Danio Rerio) To Evaluate The Use Of Food Waste Based Feed In Sustainable Small-Scale Aquaculture, Caitlin May

College of Graduate Studies: Theses & Dissertations

Food waste is rich in nutrients and a valuable resource, but currently its primary method of disposal in the United States (US) is unsustainable. In 2018 the US Environmental Protection Agency (EPA) estimated that the commercial, institutional, and residential sectors of the US economy wasted 63 million metric tons of food, most of which was sent to landfills. Instead, food waste could be recycled and used to supplement or replace commercial feed in aquaculture to sustainably stimulate production of fish. Zebrafish (Danio rerio) are a well characterized animal model closely related to other fish species that are important …

New Longitudinal Error Balancing Approaches For Closed Traverses, Jose L. Manzano

College of Graduate Studies: Theses & Dissertations

This study presents two novel approaches to balance the horizontal longitudinal error of closure, E_C, in closed polygonal traverses. The standard procedure to balance E_C is the Compass Rule. This technique reduces E_C to zero by applying corrections in the lengths of all traverse sides. Those corrections are proportional to the corresponding side lengths. That is, this approach is not an error-correcting approach, but an error-balancing procedure.

The proposed new techniques are based on sensitivity analysis of E_C with respect to small variations, Δ_i, in the lengths of all sides i = 1, …

The Role Of Symbiotic Algae In The Acclimatization Of Oculina Arbuscula To Ocean Acidification, Erin M. Arneson

College of Graduate Studies: Theses & Dissertations

Ocean acidification (OA) caused by CO₂ emissions is projected to decrease seawater pH to 7.6 by 2100. Scleractinian corals are at risk because excess H⁺ in seawater binds to carbonate (CO₃^2-), reducing its availability for CaCO₃ skeletons. The energy demand for skeletal growth increases as pH decreases because corals must actively purge excess H⁺ from their seawater sourced calcifying fluid to maintain high calcification rates. In scleractinian corals it is hypothesized that photosynthesis by symbiotic algae is critical to meet this increased energy demand. To test this hypothesis, I conducted laboratory and field …

Macroinvertebrate Responses To Hydrological Variation In Experimental Wetlands., Sergio A. Sabat-Bonilla

College of Graduate Studies: Theses & Dissertations

Predicted increases in the frequency of intense storms and periods of severe drought due to climate change represent a threat to wetland macroinvertebrate communities through alterations to the hydrological regime. I used experimental ponds to assess the effects of water permanence (i.e., duration of flooding) on the communities of aquatic macroinvertebrates. I predicted that permanent ponds would harbor higher diversity of longer-lived taxa whereas temporary ones will favor colonization by quick turnover, short-lived taxa and support lower consumer diversity. Results show differences in macroinvertebrate communities between permanent and temporary ponds can be mostly explained by hydrology and the amount of …

Advancements In Bio-Based Novel (Co)Monomers For Polymeric Materials, Khristal Anne Monroe

College of Graduate Studies: Theses & Dissertations

Most current research in the area of sustainable and environmentally friendly materials relate to the use of renewable sources for the fabrication of bio-based polymers and composites. Using plant-based derivatives is a common strategy. Pine sap can be distilled into turpentines (light fraction) and pine rosin (heavy fraction). Pine rosin is obtained as a brittle solid and its major component is abietic acid. This project aims at investigating a synthetic approach for the synthesis of a pine rosin-based polymer that can be potentially used for manufacturing a collection device for pine sap. The synthetic strategy consisted in the preparation of …

Quality Assurance Of Lightweight Structures Via Phase-Based Motion Estimation, Ikenna E. Ifekaonwu

College of Graduate Studies: Theses & Dissertations

In recent years, lightweight structures have become mature and adopted in various applications. The importance of quality assurance cannot be overemphasized hence extensive research has been conducted to assess the quality of lightweight structures. This study investigates a novel process that exploits motion magnification to investigate the damage characteristics of lightweight mission-critical parts. The goal is to assure the structural integrity of 3D printed structures and composite structures by determining the inherent defects present in the part by exploiting their vibration characteristics. The minuscule vibration of the structure was recorded with the aid of a high-speed digital camera, and the …

Dying For Change: The Impact Of Awareness Prevention And Intervention On Graduate Assistant Stress, Marla Bruner

College of Graduate Studies: Theses & Dissertations

As challenges surrounding mental health and well-being in doctoral graduate students (GAs), continue to rise, it is imperative that higher education institutions evaluate the stressors that GAs experience, their awareness and use of campus resources for dealing with stressors, and the impact that additional resources and programming may have on stress. The research questions for this study sought to examine the stressors experienced by doctoral level graduate students working in GA positions and their corresponding awareness and use of campus resources, and to determine what impact, if any, providing additional services, resources, and programming in had after a three-year implementation …

United States Nursing Homes And Health Equity During The Covid-19 Pandemic, Carla Cooper

College of Graduate Studies: Theses & Dissertations

Objective: The COVID-19 pandemic disproportionately affected older populations, with nursing homes impacted early on by the disease. The contribution of race/ethnicity of nursing home residents and facility characteristics on COVID-19 were unknown. The Donabedian model framework was used to study the relationship between the racial/ethnic characteristics of nursing home residents and COVID-19 outcomes and to examine if this relationship was moderated by the racial/ethnic composition of the county of nursing home location.

Method: Cross-sectional research design merging data from five publicly available sources. Laboratory confirmed COVID-19 cases and deaths were compared by the racial composition of the county and nursing …

The Effect Of Motivational General-Mastery Imagery On Reaction Time Performance And Heart Rate, William J. Bean Jr.

College of Graduate Studies: Theses & Dissertations

Research suggests that imagery can reduce reaction time (Alikhani et al., 2001; Grouios, 1992; Hanshaw & Sukal, 2016; Iftikhar et al., 2018; Shanks & Cameron, 2000). Previous studies examining the imagery and reaction time relationship have almost exclusively focused on motor imagery. Additionally, a recent study by McNeil and colleagues (2019) concluded that imagery training improved decision time variables, but not overall reactive agility. Individuals may not be able to generate unpredictable stimuli during imagery. The purpose of this study was to examine the effects of motivational general-mastery (MG-M) imagery on reaction time and heart rate. Reaction time was measured …

How Do Special Education Teachers View The Phenomenon Of Black Male Overrepresentation In Special Education?, Lelon B. Jeffers

College of Graduate Studies: Theses & Dissertations

As the student population in many U.S. public schools grows increasingly more diverse, the need to assess the educational practices utilized in public schools grows as well. It is imperative for educators to make a concerted effort to ensure the rights and needs of minority students are being addressed in public schools. It is the duty of educators and policy makers to protect those students who are most marginalized by society. The purpose of this qualitative study was to explore the phenomenon of Black male overrepresentation in special education, and to ascertain the views and perspectives of special education teachers …

Lipid Metabolites As Energy Stores In Four Stingray Species, Lauren Moniz

College of Graduate Studies: Theses & Dissertations

Assessing macronutrient transfer is important for estimating ecosystem health and structure. This nutrient transfer is facilitated through trophic position interactions and the consumption of biomass. Lipids are macronutrients that can be used to assess energy flow. Triglyceride (TAG) and free fatty acids (FFA) are important lipids that are obtained from diet and integrate into tissues. They are representative of energy stores and potential energy available for metabolic processes. In marine ecosystems, stingrays occupy the mesopredator niche, facilitating nutrient transfer from lower to higher trophic positions. Stingrays consume a variety of prey items ranging in lipid content, but how lipid metabolites …

Arnold Transformations As Applied To Data Encryption, Haley N. Anderson

College of Graduate Studies: Theses & Dissertations

As our world becomes increasingly digital, data security becomes key. Data must be encrypted such that it can be easily encrypted only by the intended recipient. Arnold Transformations are a useful tool in this because of its unpredictable periodicity. Our goal is to outline a method for choosing an Arnold Transformation that is both secure and easy to implement. We find the necessary and sufficient condition that a key matrix has periodicity. The chosen key matrix has a random structure, and it has a periodicity that is sufficiently high. We apply this method to several image and data string examples …

An Examination Of Faculty And Staff Collaboration And Relationships In Higher Education, Jennifer Syno

College of Graduate Studies: Theses & Dissertations

Collaboration between academic and student affairs professionals is an important means of increasing student success; however historical divides between these units have made implementation of these efforts challenging. This quantitative study sought to evaluate the perceptions of faculty and student affairs staff towards collaborative efforts and toward one another within a single campus of a comprehensive regional university within the southeast. Findings show that while both faculty and staff value collaborations and believe they positively impact student success, these units do not experience equitable voice and responsibility within collaborative efforts when conducted. Additionally, differences were found in enjoyment of collaborative …

Measuring The Success Of A Coastal Sand Dune Restoration On Tybee Island: Plant Growth, Sand Accretion, And Implications For Management, Shannon Matzke

College of Graduate Studies: Theses & Dissertations

Coastal communities are developing rapidly in the face of increased risks of sea level rise and hurricanes stemming from anthropogenic climate change. In the US, erosion is projected to cost $530 million/year in property loss, but beaches and dune systems can minimize these losses. Dunes are vital to coastal protection, particularly when they are colonized by native plant species that stabilize sand with their root systems and accumulate sand by trapping particles with their stems and leaves. Dune construction can be used as a nature-based solution to climate change, but more studies are needed to fully understand the best practices …

Working Memory Capacity Among College Students: The Role Of Gender And Posttraumatic Stress Symptoms, Lydia R. Bickham

College of Graduate Studies: Theses & Dissertations

Among college students, 81.8% report experiencing at least one traumatic event in their lifetime, and approximately one third report experiencing Posttraumatic Stress Symptoms (PTSS) (Overstreet, Berenz, Kendler, Dick, & Amstadter, 2017). Individuals who experience PTSS may have impaired cognitive functioning when processing trauma-relevant material (Blanchette, Rutembesa, Habimana, & Caparos, 2018). An example of this is working memory capacity (WMC), which can be disrupted by affective distractors (Vytal, Cornwell, & Letkiewicz, 2013). In addition to impaired daily functioning (American Psychiatric Association (APA), 2013) those with lower cognitive performance also respond less effectively to clinical treatment options for PTSS (Wild & Gur, …

Perceptions Of Local Board Of Health Effectiveness In Georgia, Amber Erickson

College of Graduate Studies: Theses & Dissertations

Objective: The purpose of this study is to examine the perceptions of the local board of health chairpersons in Georgia on their engagement in six governance functions and examining the challenges faced and facilitators perceived by local boards of health in performing the governance functions properly. Methods: For this descriptive mixed method study design, a survey was administered to all local board of health chairpersons and key informant interviews were conducted with a small selection of board of health chairpersons. Descriptive statistics were produced for recoded survey data variables and themes from qualitative data collected through the surveys and interviews …

Design And Development Of Soft Earthworm Robot Driven By Fibrous Artificial Muscles, Beau Ragland

College of Graduate Studies: Theses & Dissertations

Earthworm robots have proven their viability in the fields of medicine, reconnaissance, search and rescue, and infrastructure inspection. These robots are traditionally typically hard-shelled and must be tethered to whatever drives their locomotion. For this reason, truly autonomous capabilities are not yet feasible. The goal of this thesis is to introduce a robot that not only sets the groundwork for autonomous locomotion, but also is safe for human-robot interaction. This was done by ensuring that the actuation principle utilized by the robot is safe around humans and can work in an untethered design. Artificial muscle actuation allowed for these prerequisites …

Experimental And Numerical Investigation Of Naca Airfoil Wing With Winglets, Courtney Danielle Bachmann

College of Graduate Studies: Theses & Dissertations

This research was performed in order to study wingtip devices and, in particular, winglets. Winglets are attached to commercial aircraft for the purpose of reducing induced drag caused by wake vortices on the wingtip. A winglet device can save an aircraft anywhere from 3-7% in fuel consumption. Over the course of a year, this can add up to hundreds of thousands of dollars saved. This research consisted of two parts: one part experiment and one part equipment design. The latter phase of this research examined various methods of testing in a subsonic wind tunnel laboratory setting. Experimental results found with …

Assessing The Utility Of Environmental Dna Techniques To Monitor White Shrimp (Litopenaeus Setiferus) Abundance On The Georgia Coast, Raven Hurt

College of Graduate Studies: Theses & Dissertations

Environmental DNA (eDNA) surveys have developed over the last decade from once being a novel tool to now acting as an effective technology often used in complement to traditional capture surveys for assessing the distribution of organisms in freshwater and marine environments. However, many uncertainties on how to properly develop, operate, and analyze eDNA based techniques still hinder this technology effectiveness in the field. The white shrimp, Litopenaeus setiferus, is a common, commercially and recreationally important species in the United States, with landings exceeding $254 million in 2020. L. setiferus is also used as a key indicator species to changes …

Evaluating St. Catherines Island's Shoreline, Vegetation Line, And The Locations Of Loggerhead Sea Turtle Nests, Sydney O. Davis

College of Graduate Studies: Theses & Dissertations

St. Catherines Island is a highly dynamic barrier island on the Georgia coast that is also federally listed critical nesting habitat for loggerhead sea turtles. Understanding how St. Catherines’ shoreline and vegetation is changing over time is geographically important as a potential template for other barrier islands. Measuring sea turtle nest locations will provide insight into their natural patterns and how they adjust those locations on a changing barrier island. Analyzing Moving Boundaries Using R (AMBUR) is implemented in this research to assess the movement of the vegetation and shorelines from 2005-2017 using the End Point Rate (EPR) and Linear …

Development Of A Mathematical Model For Galvanic Cells, Joshua C. Johnson

College of Graduate Studies: Theses & Dissertations

It is possible to utilize principles of equilibrium thermodynamics to model the voltage a battery renders as it powers a load in time and discharges. Similarly, consideration of the internal chemistry inside a battery, or galvanic cell, enables modeling thereof. This paper builds upon these principles and presents a derivation of the Nernst equation that utilizes this result to model discharge curves in time for different types of batteries. The Nernst equation relates chemical activity of the reagents inside a battery to the open circuit voltage rendered by the system. By combining the Nernst equation with Faraday's laws of electrolysis, …

Georgia Southern Libraries Annual Report 2021, Georgia Southern University Libraries

Library Annual Reports

The University Libraries use a fiscal year scorecard to plan and coordinate strategic initiatives. The goals listed in the scorecard are aligned with the University’s Strategic Plan and specifically address how we support those goals. As a team, we develop a yearly scorecard to itemize and track select activities, by strategic planning goal, within our departments and as a Libraries. These combined activities represent our commitment to strategic planning initiatives for that fiscal year. The combined structure of University’s goals and Libraries’ objectives and activities serve as our strategic planning document.