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Impact Of Operational Conditions On The Transient Thermal Behavior Of Lithium-Ion Batteries, Jairo Sebastian Casa
Impact Of Operational Conditions On The Transient Thermal Behavior Of Lithium-Ion Batteries, Jairo Sebastian Casa
College of Graduate Studies: Theses & Dissertations
Considering the high increase of lithium-ion batteries (LIBs) through the years, it is important to analyze the impact of the operational conditions, such as charging and discharging on the transient thermal behavior of LIBs for thermal management of Li-Ion batteries. A pseudo two-dimensional mathematical model based on the finite volume method (Doyle-Fuller Newman) available in an open-source environment such as Python, was utilized for the electrochemical evaluation of the Li-Ion battery. For simplicity, a lumped thermal model was integrated with the electrochemistry model to evaluate the transient behavior of Li-Ion cells under varying conditions. Both the electrochemistry and lumped thermal …
Investigation Of Topologically Protected Wave Propagation Near Dirac-Like Cones In Acoustic Metamaterials, Md Arif Iqbal Khan
Investigation Of Topologically Protected Wave Propagation Near Dirac-Like Cones In Acoustic Metamaterials, Md Arif Iqbal Khan
College of Graduate Studies: Theses & Dissertations
This study presents a novel approach to investigate an exceptionally rare acoustic phenomenon – topologically protected wave propagation (TPWP) within a solid-solid domain. While previous research has attempted to unravel the physics behind this phenomenon, most efforts have been grounded in the framework of condensed matter physics and quantum mechanics often requiring complex geometries to realize TPWP in solid-fluid interactions. In contrast, this thesis introduces a geometric tuning method that enables the achievement of TPWP with simpler geometric configurations within a solid-solid domain. Rather than explaining by the quantum trio - quantum anomalous hall effect, quantum valley hall effect, and …
Performing Holt-Winters Time Series Forecasting Using Neural Network Based Models, Kazeem Olanrewaju Bankole
Performing Holt-Winters Time Series Forecasting Using Neural Network Based Models, Kazeem Olanrewaju Bankole
College of Graduate Studies: Theses & Dissertations
We show how to create Artificial Neural Network based models for performing the well- known Holt-Winters time series analysis. Our work fares well compared to the well-known Holt-Winter time series prediction method while avoiding the burden of searching for the parameters of the model. We present the theoretical justification of the connection between the two models and experimental results showing the similarities of these models
Assessing Performance Optimization Strategies In Cloud-Native Environments Through Containerization And Orchestration Analysis, Daniel E. Ukene
Assessing Performance Optimization Strategies In Cloud-Native Environments Through Containerization And Orchestration Analysis, Daniel E. Ukene
College of Graduate Studies: Theses & Dissertations
This thesis comprises three distinct, yet interconnected studies addressing critical aspects of web infrastructure management. We begin by studying containerization via Docker and its impact on web server performance, focusing on Apache and Nginx hosted on virtualized environments. Through meticulous load testing and analysis, we provide insights into the comparative performance of these servers, adding users of this technology know which webservers to leverage when hosting their webservice along alongside the infrastructure to host it on. Next, we expand our focus to examine the performance of caching systems, namely Redis and Memcached, across traditional VMs and Docker containers. By comparing …
Aerothermodynamic Analysis Of A Linear Aerospike Fueled With Liquid Methane Using Cfd, Aidan Rowell
Aerothermodynamic Analysis Of A Linear Aerospike Fueled With Liquid Methane Using Cfd, Aidan Rowell
Honors College Theses
Renewed interest in manned spaceflight, mostly spurred by the advancement of commercial spacecraft, has led to growing interest in improving the efficiency of rocket engines. Aerospike nozzles have the potential to provide this boost in efficiency to spacecraft and thus lower costs and increase payload capacity. This type of nozzle is what is known as altitude adjusting and can significantly increase efficiency. When paired with propellants such as methane/oxygen, which can be manufactured in-situ on some planetary bodies and has a higher density than traditional propellants like liquid hydrogen/liquid oxygen, even more efficiency gain can be achieved. To understand the …
Zeckendorf Representation Analysis On Third Order Fibonacci Sequences That Do Not Satisfy The Uniqueness Property, Samuel A. Aguilar
Zeckendorf Representation Analysis On Third Order Fibonacci Sequences That Do Not Satisfy The Uniqueness Property, Samuel A. Aguilar
Honors College Theses
Zeckendorf's Theorem states that every natural number can be expressed uniquely as the sum of distinct non-consecutive terms of the shifted Fibonacci sequence (i.e. 1, 2, 3, 5, ...). This theorem has motivated the study of representation of integers by the sum of non-adjacent terms of Nth order Fibonacci sequences, including the characterization of the uniqueness of Zeckendorf representation based on the initial terms of the sequence. Moreover, when this uniqueness property is satisfied for third order Fibonacci sequences, the ratio of integers less than a given number X that have a Zeckendorf representation has been estimated by Dr. Sungkon …
Evolution Of Angular Momentum In Triaxial Dark Matter Halos, Tara C. Nester
Evolution Of Angular Momentum In Triaxial Dark Matter Halos, Tara C. Nester
Honors College Theses
Galactic halos are believed to form through both the early inflow of dark matter from the cosmic web and mergers over an extended period. At the same time, stellar disks are forming within this evolving halo. How a stellar disk responds to a changing halo is investigated in this study using live n-body disks embedded in an analytic triaxial potential. At triaxialities of a few percent, we find that while there are subtle perturbations in the disk, there is no significant change in the total disk angular momentum. However, between 5 and 10% triaxialities there is a sharp transition to …
Enumeration Of Increasing Trees, Garrett M. Southwood
Enumeration Of Increasing Trees, Garrett M. Southwood
Honors College Theses
We consider the generating function for increasingly labelled trees. By generalizing the proof through symbolic method, we are able to study various statistics regarding binary increasing trees with respect to height restrictions. We then apply our approach to special colorings of increasing trees in order to obtain their generating functions and, from there, derive the counting sequence for (ak+a)-colored recursive trees. We also present some interesting bijections between colored and non-colored increasing trees.
Differences In Death And Dying Anxiety Among Undergraduate Freshmen And Seniors, Greyson A. Owens
Differences In Death And Dying Anxiety Among Undergraduate Freshmen And Seniors, Greyson A. Owens
Honors College Theses
This research will observe the differences in death anxiety among undergraduate university freshmen and seniors. This study was conducted using a quantitative survey instrument. The Collett-Lester death anxiety scale was used to survey students. The instrument consists of thirty-two Likert scale questions that focused on anxiety levels of death and dying for the respondents and when thinking of others. I asked professors to post a recruitment flyer that I emailed to them on their Folio page, and I also posted these flyers in common areas on the Georgia Southern Campus. Data from freshmen and seniors were collected and analyzed. I …
Amination Of 2-Bromo-6-Methylaminopyridine, Matthew H. Elterman
Amination Of 2-Bromo-6-Methylaminopyridine, Matthew H. Elterman
Honors College Theses
Extended metal atom chains (EMACs) represent molecular structures comprising a linear arrangement of metal ions, accompanied by supporting ligands. These compounds possess intriguing properties, yet remain understudied, drawing interest from diverse fields such as physics. However, synthesizing these multimetallic complexes poses significant challenges due to their intricate nature and specificity. Bridging ligands like silyl aminopyridine (SAP) and dipyridyl amine (DAP) have been utilized successfully to support EMACs, with SAP's application in this context being limited to a single published case, highlighting the urgent need for stabilization. This project aims to address this challenge through the synthesis of a novel scaffolded …
Driven Magnetic Vortex Dynamics, Chase Hickman
Driven Magnetic Vortex Dynamics, Chase Hickman
Honors College Theses
Magnetic materials possess properties that allow for efficient data storage and transmission. Two important magnetic phenomena are domains and spin waves, both of which are active areas of research. Domains are regions of locally aligned magnetic moments within a material and spin waves are propagating disturbances in the alignment of those moments. A specific type of domain occurs when moments align to form a topological structure known as a magnetic vortex. Vortices are composed of a swirling in-plane magnetization centered around a localized region of out-of-plane magnetization known as a vortex core. A vortex has an in-plane chirality and out-of-plane …
Assessment Of The Extraction And Quantification Of Pfbs From Sprague Dawley Rat Adipose Tissues, Joshua O. Osaghae
Assessment Of The Extraction And Quantification Of Pfbs From Sprague Dawley Rat Adipose Tissues, Joshua O. Osaghae
Honors College Theses
Per- and polyfluoroalkyl substances (PFAS) are a group of complex synthetic chemicals that have applications ranging from automotives to consumer products. PFAS have been found to bioaccumulate in the ecosystem as their carbon-fluorine bonds are among the strongest bonds in organic chemistry. Perfluorobutanesulfonic acid (PFBS) compounds are used as surfactants in water- and stain-repellent coatings for fabrics and carpets, cleaning agents, and paints. The persistence of PFAS has led to their accumulation in sources of groundwater, making them ubiquitous drinking water contaminants of concern with evidence linking PFAS exposure to adverse health effects, including reduced kidney function, thyroid disruption, and …
Graduate Catalog, Georgia Southern University
A Comparative Analysis Of A Family Of Advanced Iterative Optimization Methods In Nonlinear Regression, Tanmoy Kumar Debnath
A Comparative Analysis Of A Family Of Advanced Iterative Optimization Methods In Nonlinear Regression, Tanmoy Kumar Debnath
College of Graduate Studies: Theses & Dissertations
Classical statistical supervised learning optimization techniques like the Gauss-Newton Iterative Method (GNIM), Weighted Gauss-Newton Iterative Method (WGNIM), Reweighted Gauss-Newton Iterative Method (RGNIM), and Levenberg-Marquart (LM) algorithm extend the nonlinear least squares method. The WGNIM improves model fitting by controlling heteroscedasticity in the linear and nonlinear models. A comparative analysis of the GNIM, WGNIM, RGNIM, and LM methods for fitting nonlinear models is presented. A step-wise diagnosis for structural multicollinearity in the reweighted linearized model is investigated via the Variance Inflation Factor (VIF) to determine variance inflation in the sequence of estimators for the model parameters. Under restricted multicollinearity levels in …
Mathematical Modeling Of Coupled Heat And Mass Transfer In Metal-Hydride Hydrogen Storage Systems, Muhammad Hasnain
Mathematical Modeling Of Coupled Heat And Mass Transfer In Metal-Hydride Hydrogen Storage Systems, Muhammad Hasnain
College of Graduate Studies: Theses & Dissertations
As a promising clean energy carrier hydrogen has recently gained significant interest, but its efficient and safe storage is a major challenge. Compared to the gaseous state and liquid state, metal hydrides (MH) offer a potentially more effective storage approach for hydrogen. However, the main challenge in this approach is the low thermal conductivity of the MH bed that leads to low heat transfer and ultimately to higher charging and discharging times. The purpose of this work is to develop an in-house comprehensive heat and mass transfer model for hydrogen sorption in MH reactors to simulate the dynamic behavior of …
Exploring The Consistency Of Flow Regimes Within And Among Ecoregions Of The Southeastern United States, Frank Paul Braun Iv
Exploring The Consistency Of Flow Regimes Within And Among Ecoregions Of The Southeastern United States, Frank Paul Braun Iv
College of Graduate Studies: Theses & Dissertations
Human manipulation of river systems has long been a known contributor to the loss of freshwater biodiversity. By accounting for environmental causes of hydrologic variation among rivers, we can better understand how ecoregion mediates flow regimes and forecast species that may be at risk. Presumably, natural variation associated with ecoregion boundaries exerts strong influence on flow regimes, and may mediate relationships between other features (e.g., land use, dam operations) and hydrology. However, such between-ecoregion variation is poorly investigated, particularly at fine spatial and temporal scales. I characterized 10 hydrologic metrics, representing the five key dimensions of the flow regime (magnitude, …
Screening H3 Histone Acetylation In A Wild Bird, The House Sparrow (Passer Domesticus), Daniella Ray
Screening H3 Histone Acetylation In A Wild Bird, The House Sparrow (Passer Domesticus), Daniella Ray
College of Graduate Studies: Theses & Dissertations
Epigenetic mechanisms are increasingly understood to have major impacts across ecology. However, one molecular epigenetic mechanism, DNA methylation, currently dominates the literature. A second mechanism, histone modification, is likely important to ecologically relevant phenotypes and thus warrants investigation, especially because molecular interplay between methylation and histone acetylation can strongly affect gene expression. There are a limited number of histone acetylation studies on non-model organisms, yet those that exist show that it can impact gene expression and phenotypic plasticity. Wild birds provide an excellent system to investigate histone acetylation, as free-living individuals must rapidly adjust to environmental change. Here, we screen …
Computer Cravings In 20th Century Schools: From Creativity To Capitalism, Keely E. Amos
Computer Cravings In 20th Century Schools: From Creativity To Capitalism, Keely E. Amos
College of Graduate Studies: Theses & Dissertations
This dissertation examines the push for computers in education from the early 1980s to the early 2000s. During that time, computers were introduced into schools across America with big promises, in turn creating big dreams. Instead of the cognition, creativity, and collaboration that was envisioned with computers in the classroom, the shifting motivations regarding computers have exacerbated the datafication and standardization of our students (Cuban, 2001). The problems associated with the corporation of computers into the curriculum are widespread (Pinar et. al, 1995/2004). Following the methodology of Historiography, this paper provides a critical examination about what was promised, and by …
Bringing Gans To Medieval Times: Manuscript Translation Models, Tonilynn M. Holtz
Bringing Gans To Medieval Times: Manuscript Translation Models, Tonilynn M. Holtz
College of Graduate Studies: Theses & Dissertations
The Generative Adversarial Networks (GAN) recently emerged as a powerful framework for producing new knowledge from existing knowledge. These models aim to learn patterns from input data then use that knowledge to generate output data samples that plausibly appear to belong to the same set as the input data. Medieval manuscripts study has been an important research area in the humanities field for many decades. These rare manuscripts are often times inaccessible to the general public, including students in scholars, and it is of a great interest to provide digital support (including, but not limited to translation and search) for …
Self-Supervised Contrastive Learning Using Eeg Signals For Mental Stress Assessment, Ugochukwu Uraechu
Self-Supervised Contrastive Learning Using Eeg Signals For Mental Stress Assessment, Ugochukwu Uraechu
College of Graduate Studies: Theses & Dissertations
A study is presented to investigate self-supervised contrastive learning (SSCL) models using physiological data obtained from non-invasive wearable sensors for mental stress assessment. The present work involved acquisition of electroencephalography (EEG) signals using wearable sensors, signal preprocessing, data augmentation, and investigation of self-supervised contrastive learning (SSCL) algorithms for multi-class mental stress assessment. Seven volunteers participated in this study executing various mental tasks while wearing an OpenBCI head cap to acquire EEG signals. The acquired EEG signals were preprocessed and utilized for data augmentation in time and frequency domains with different SSCL models. Optimal data augmentation combinations and SSCL models were …
Increasing Commuter Students’ Sense Of Belonging With Situated Learning In A First-Year Computer Programming Course, Lily R. Liang, Rui Kang
Increasing Commuter Students’ Sense Of Belonging With Situated Learning In A First-Year Computer Programming Course, Lily R. Liang, Rui Kang
International Journal for the Scholarship of Teaching & Learning
This study examines the impact of a situated learning class framework on student learning and sense of belonging in a first-year introductory computer programming course offered at an urban commuter campus. The framework provided students opportunities to engage in hands-on activities embedded in authentic contexts facilitated or led by students from computer science clubs and a service-learning program. Our results suggest that 1) participation in peer interactions within the classroom helped students build learning communities and networks beyond the classroom and strengthened their development of a professional identity; 2) through redesigning curriculum and pedagogy to accommodate students’ needs and learning …
From Expectations To Experiences: Students’ Perceptions Of Specifications Grading In Higher Education, Adriana Streifer, Michael Palmer, Jessica Taggart
From Expectations To Experiences: Students’ Perceptions Of Specifications Grading In Higher Education, Adriana Streifer, Michael Palmer, Jessica Taggart
International Journal for the Scholarship of Teaching & Learning
Specifications grading is a form of alternative grading that emphasizes transparency, low stakes, student learning, and equity. It has attracted practitioners for its potential to enhance student motivation, and to remedy several challenges of traditional grading. Specifications grading has become increasingly popular, yet little is known about students' perceptions of and experiences with it. We examined students’ predicted and actual experiences of specifications grading in courses across several disciplines at a research-intensive, public university in the United States. Particular attention was paid to how students perceive specifications grading to influence their motivations to learn. Most students expressed positive attitudes toward …
Scale And Scope: Building Sotl Capacity Through Collaborative Library Partnerships, Laura Cruz, Ellysa Stern Cahoy
Scale And Scope: Building Sotl Capacity Through Collaborative Library Partnerships, Laura Cruz, Ellysa Stern Cahoy
International Journal for the Scholarship of Teaching & Learning
Centers for Teaching and Learning (CTLs) have long collaborated with academic librarians, especially around the Scholarship of Teaching and Learning, but full, reciprocal partnerships are relatively rare. This exploratory, interview- based study seeks to gain insight into how participants (n=4) experienced one such partnership, focused on building institutional capacity for engagement with scoping reviews in SoTL. Our findings reveal that these types of partnerships can have distinctive influences on participating faculty members that extend beyond a single program, service, or project. These insights illuminate the challenges and opportunities long-term partnerships present to both the institutionalization of SoTL and the evolving …
Geoelectrical And Hydrochemical Characterization Of Submarine Groundwater Discharge In Florida Bay, Ifeanyi Emmanuel Eze
Geoelectrical And Hydrochemical Characterization Of Submarine Groundwater Discharge In Florida Bay, Ifeanyi Emmanuel Eze
College of Graduate Studies: Theses & Dissertations
Florida Bay, situated at the southern tip of Everglades National Park and underlain by the Miami Limestone formation, is an ecosystem of global significance. Over the past century, the bay has faced threats such as droughts, seagrass mortality, and hypersalinity. Despite various studies and management efforts, the dynamics of submarine groundwater discharge (SGD) in the region remain underexplored. Given that SGD plays a significant role in the chemical dynamics of coastal ecosystems, it warrants thorough investigation. This study aims to characterize the spatial and temporal patterns of SGD in Florida Bay by surveying three basins – Rankin, Whipray, and Rabbit …
2024 Conference Program, Georgia Southern University
2024 Conference Program, Georgia Southern University
SoTL Commons Conference
Conference program for 2024
"Fulfil In Beauty My Imperfect Prayer": Mythologization In Santayana's Aesthetics Of Religion, India M. Johnson-Mccauley
"Fulfil In Beauty My Imperfect Prayer": Mythologization In Santayana's Aesthetics Of Religion, India M. Johnson-Mccauley
Honors College Theses
This thesis addresses George Santayana’s theories of art and religion in the context of turn-of-the-century religious thought and introduces the concept of the mythologization of religion. Santayana, the Spanish-American turn-of-the-century philosopher, poet, and novelist, took a naturalist, pragmatist, and religious non-realist approach to understanding the world that prompted works regarding the nature of art, The Sense of Beauty (1896), and the nature of religion, Interpretations of Poetry and Religion (1900). Within these two works, Santayana proposes a theory of aesthetics and a theory of religion that seem to function in tandem with each other. According to his theories, art, particularly …
Synthesis Of Chiral Amino Acids Via Direct Amination Of Diazo Ester With A Rhodium-Based Catalyst, Steven J. Boyles
Synthesis Of Chiral Amino Acids Via Direct Amination Of Diazo Ester With A Rhodium-Based Catalyst, Steven J. Boyles
Honors College Theses
Amino acids are critical molecules within living organisms as they are the building blocks of proteins. In organisms, proteins serve as regulators of necessary processes, structural components in tissue, hormones, and neurotransmitters. Amino acid therapy is an emerging treatment in the medical field used to treat symptoms of diseases such as Alzheimer’s disease, Parkinson’s disease, and multiple sclerosis. Amino acid therapies have also shown promising effects when it comes to treating mood disorders and weight management. In order to increase the number of amino acids available and increase the potential treatments for other ailments, there is a drive to increase …
Simulation Of Wave Propagation In Granular Particles Using A Discrete Element Model, Syed Tahmid Hussan
Simulation Of Wave Propagation In Granular Particles Using A Discrete Element Model, Syed Tahmid Hussan
College of Graduate Studies: Theses & Dissertations
The understanding of Bender Element mechanism and utilization of Particle Flow Code (PFC) to simulate the seismic wave behavior is important to test the dynamic behavior of soil particles. Both discrete and finite element methods can be used to simulate wave behavior. However, Discrete Element Method (DEM) is mostly suitable, as the micro scaled soil particle cannot be fully considered as continuous specimen like a piece of rod or aluminum. Recently DEM has been widely used to study mechanical properties of soils at particle level considering the particles as balls. This study represents a comparative analysis of Voigt and Best …
Transcriptional Induction Of Immune Pathway Genes And Subsequent Antibacterial Activity In The Digestive Tract Of The Cat Flea (Ctenocephalides Felis)., Katie A. Weber
College of Graduate Studies: Theses & Dissertations
Fleas (Order Siphonaptera) are ectoparasites that serve as vectors of several human diseases (cat scratch disease, flea-borne spotted fever, murine typhus, and plague). Typically, these pathogens are acquired through the ingestion of a host-derived bloodmeal; thus, the lumen of the gut is the first barrier encountered by imbibed pathogens. During the early stages of infection, microbes come into contact with surrounding midgut epithelial cells which trigger a series of host responses to combat local infection. Specifically, pathogen recognition leads to intracellular signaling and an increase in the production of antimicrobial peptides (AMPs) via the IMD and Toll immune pathways. While …