Digital Commons Network^™

Evaluating Model Fidelity To Aid Model Selection, Evan Hybl

Honors College Theses

In simulation, fidelity has become a topic of interest in determining how well a simulation is able to represent its referent situation. In many cases, the true referent is the real-world scenario in which the system will exist. However, the fidelity of a simulation may be computed in comparison to other referents including other simulation models or tests. Several metrics have been proposed to evaluate a model based on qualitative or subjective parameters. These proposed metrics offer possible solutions for the quantification of model fidelity, however their inability to compare features relative importance greatly limits their applicability to models and …

The Development Of A Mobile Ad-Hoc Network Testbed: Modular Implementation Of Ad-Hoc On-Demand Distance Vector Routing, Gage Gailbreath, Andre Koka, Mohammed Gharib, Fatemeh Afghah

Honors College Theses

In communication systems, a Mobile Ad-Hoc Network (MANET) is a communication topology that has no central infrastructure, in contrast to more common network topologies such as Wi-fi or cellular towers. MANETs are of particular interest in the field as Internet-of-Things (IOT) applications and the push towards 6th-generation (6G) communications continues. MANET networks provide communication access to all nodes within the network using peer-to-peer communications, requiring extensive maintenance and updating of routes within the network as nodes move around. Routing protocols must be designed and used for these networks, and are typically complex algorithms that are difficult to implement on hardware. …

Diversity Climate, Burnout, And Employee Engagement: Considering The Moderating Effects Of Positive And Negative Affect As Individual Differences, Shreya Tellur

Honors College Theses

No abstract provided.

Examining The Effects Of Hormonal Contraception On Injury In Collegiate Club And Recreation Sports, Kaitlyn Doherty

Honors College Theses

Background: There are differences among injury rates between males and females in collegiate sports. Hormonal contraception is used in females as a way of balancing hormones. There is limited research on the effects of hormonal contraception on injury outcomes in females.

Purpose: The purpose of this study was to examine the effects of hormonal contraceptives on injury in collegiate club and recreation sports.

Methods: A one-time survey was administered to all students enrolled in intramural sports at a mid-sized Southeastern Division I university. Questions were asked regarding injury history, menstrual cycle, and use of hormonal contraceptives.

Results: Analysis of survey …

Opioid Overdose Knowledge And Attitudes Among Undergraduate College Studentsopioid Overdose Knowledge And Attitudes Among Undergraduate College Students, Kaiya Cook

Honors College Theses

No abstract provided.

Leveraging Artificial Intelligence For Team Cognition In Human-Ai Teams, Beau Schelble

All Dissertations

Advances in artificial intelligence (AI) technologies have enabled AI to be applied across a wide variety of new fields like cryptography, art, and data analysis. Several of these fields are social in nature, including decision-making and teaming, which introduces a new set of challenges for AI research. While each of these fields has its unique challenges, the area of human-AI teaming is beset with many that center around the expectations and abilities of AI teammates. One such challenge is understanding team cognition in these human-AI teams and AI teammates' ability to contribute towards, support, and encourage it. Team cognition is …

A Scalable Transmission And Distribution Co-Simulation Platform For Ibr-Heavy Power Systems, Yousu Chen

All Dissertations

The grid is evolving rapidly to meet the requirements of the clean energy transition. This evolution involves an increasing penetration of renewable energy resources and new complexities with a larger number of devices and controls spread across transmission and distribution networks. The boundary between transmission and distribution becomes blur. Consequently, we face significant challenges in managing the fundamental shift in power system physics. The ubiquitous use of Inverter Based Resources (IBRs) throughout the transmission and distribution systems has made it more difficult for the grid to maintain grid stability under dynamic conditions. Therefore, there is a strong need to explore …

Influence Of Photoreactor Design Parameters On The Performance Of Ultraviolet Light-Induced Degradation Of Per-And Polyfluoroalkyl Substances By Bismuth Oxy Hydroxy Phosphate And Hexagonal Boron Nitride Photocatalystsinfluence Of Photoreactor Design Parameters On The Performance Of Ultraviolet Light-Induced Degradation Of Per-And Polyfluoroalkyl Substances By Bismuth Oxy Hydroxy Phosphate And Hexagonal Boron Nitride Photocatalysts, Mojtaba Qanbarzadeh

All Dissertations

The main objective of this study is to evaluate the practical applicability of heterogeneous photocatalysis technology powered by ultraviolet (UV) photons for the degradation of per and -polyfluoroalkyl substances (PFAS) in contaminated groundwater samples. For this purpose, bismuth oxyhydroxy phosphate (BOHP) and hexagonal boron nitride (hBN) were utilized as the main photocatalysts in slurry photodegradation systems. BOHP (Bi₃O(OH)(PO₄)₂) is a wide bandgap semiconductor with high activity for degrading long-chain perfluorocarboxylic acids (PFCAs) in mild operational conditions. Boron nitride (BN) is another wide bandgap semiconductor material that was used in this study due to its …

Feasibility Of Using High-Alkali Natural Pozzolans And Reclaimed Fly Ash As Alternative Supplementary Cementitious Materials In Concrete, Weiqi Wang

All Dissertations

Due to the shortage of supplementary cementitious materials (SCMs) in the concrete industry, it is necessary to seek a new alternative. This study evaluates the feasibility of high-alkali SCMs, which were not recommended previously due to potentially exacerbating alkali-silica reaction (ASR) in concrete. The study addresses theSCMs’ ASR mitigation performance, evaluated by ASTM C1567, C1293, and AASHTO T380. Other concrete durability tests, including ASTM C596 drying shrinkage test, ASTM C1012 sulfate resistance test, and ASTM C1202 rapid chloride ions penetration test, were also conducted in this study. The ASTM C311 strength activity index test, thermal gravimetric analysis (TGA), and ASTM …

Studies On Electrochemical Hydrogen Isotope Separation, Liyanage Mayura Sankalpa Silva

All Dissertations

Graphene-integrated Proton Exchange Membrane (PEM) electrochemical cells have emerged as a novel area of scientific investigation in the realm of hydrogen isotope separation. Chemical Vapor Deposited (CVD) graphene has been especially useful due to its large-scale production capability for scaling-up purposes. The research described in this dissertation explores the role that inadvertent introduction of cations, notably ammonium and copper, during the CVD graphene transfer onto PEM substrates, such as Nafion, might play in affecting hydrogen ion transport and isotope separation in PEM electrochemical cells. An extensive review of existing literature exposed a gap concerning unintentional cation introductions during graphene transfer, …

The Use Of The South Carolina School Improvement Model - Quick Cycles In Sixth-Grade Science Classrooms, Jennifer Gnann

All Dissertations

Using data to make informed decisions about instruction strengthens a teacher’s delivery of content within the classroom. However, many teachers have not been taught how to properly use a model of rapid improvement cycles to analyze data and apply it to their classroom instruction. I modified the South Carolina School Improvement Model so that it could be used in short cycles to see how teachers used it to plan for, monitor, and adjust instruction in their classrooms.

I conducted a single case study over a six-week period in which I instructed two sixth-grade science teachers on how to use the …

Deep Reinforcement Learning For The Design Of Structural Topologies, Nathan Brown

All Dissertations

Advances in machine learning algorithms and increased computational efficiencies have given engineers new capabilities and tools for engineering design. The presented work investigates using deep reinforcement learning (DRL), a subset of deep machine learning that teaches an agent to complete a task through accumulating experiences in an interactive environment, to design 2D structural topologies. Three unique structural topology design problems are investigated to validate DRL as a practical design automation tool to produce high-performing designs in structural topology domains.

The first design problem attempts to find a gradient-free alternative to solving the compliance minimization topology optimization problem. In the proposed …

Force Displacement, Forced Perspective: The Rhetorics Of Refugee Experience, Jonathan Burgess

All Dissertations

This dissertation interrogates the intersection of digital media, displacement, and human rights within the contemporary geopolitical landscape, with a specific focus on the MENA region. From a perspective firmly rooted rhetoric, it dissects the complex relationship between technology and displaced populations, emphasizing the role of transmedia storytelling in shaping refugee experiences and narratives and the potential for transmedia storytelling to facilitate greater insights into needs and gaps for displaced people. Central to the analysis is the paradox of digital tools both as emancipatory devices and tools of surveillance and control, which are further elucidated through case studies.

Engaging with thinkers …

An Investigation Of The Accretion Processes In T Tauri And Herbig Ae/Be Systems Using High Resolution Optical And Near-Infrared Spectroscopy, Joshua Kern

All Dissertations

Star and planet formation is intimately tied to the accretion of material from the environments in which they form. During the formation process, disks of gas and dust develop in young stellar objects through which material is facilitated to the star and forming planets. Theoretical models of these accretion processes invoke viscous spreading via hydrodynamics, as well as more complex interactions with magnetic fields be it from the stellar component or the formation environment in order to catalyze these mass flows. These accretion models predict various scenarios including magnetospheric accretion as well as supersonic accretion flows in the disk atmosphere …

Addressing Mercury Contamination From Artisanal Gold Mining In Colombia: Pollution Exposure, Health Risk, And Educational Efforts In The Communities Of La Toma, Colombia, Kelli Mccourt

All Dissertations

Artisanal and small-scale gold mining (ASGM) has become a primary environmental and public health concern in the region of Colombia known as Alto Cauca. The predominantly Afro-descendent communities of Yolombó and La Toma in Alto Cauca have experienced pollution linked to the use of mercury in the ASGM process. For the past decade, mercury has emerged as a contaminant of increasing concern in the communities due to its toxicity and ability to bioaccumulate and biomagnify. Likewise, mining in the region raises concerns over the leaching of metals into local waters. Given the complexity of risk and pollution in the communities, …

A Social-Ecological Systems Inquiry For Understanding Environmental Change In Los Angeles Outer-Ring Suburbs, Farnaz Kamyab

All Dissertations

Within the framework of the city's green infrastructure, urban and suburban green coverage play a pivotal role in delivering substantial benefits to health, economy, and the environment. However, the permanence of these green coverage is threatened by dynamic changes in neighborhood socio-economic, spatial, and ecological elements and their loss or degradation presents a problematic issue. Social-Ecological System Theory (SES) offers a comprehensive framework for understanding the potential correlations between socio-economic trends and the degradation of green coverage. This research is based on a case study of the highly diverse megacity, Los Angeles (LA), which encompasses a wide array of built-environments, …

Leveraging Professional Learning To Impact Leadership Of Technology Integration, Tennille Woodward

All Dissertations

School and district leaders lack awareness of the depth and complexity of the International Society for Technology in Education (ISTE) Standards for Education Leaders and how the implementation of the leader standards provides for students and teachers to learn relevant skills and strategies. Continuing the work of Schoenbart’s 2019 dissertation, the Education Leaders Technology Survey (ELTS) provides a self-assessment for education leaders to reflect on their leadership of technology integration and provides baseline data for this study. Professional learning around the ISTE Standards for Education Leaders provided through a Canvas course provides education leaders with a theory of action to …

First Genomic Resource For An Endangered Neotropical Mega-Herbivore: The Complete Mitochondrial Genome Of The Forest-Dweller (Baird's) Tapir (Tapirus Bairdii), Caroline C. Ennis

Honors College Theses

Baird's tapir, or the Central American Tapir Tapirus bairdii (family Tapiridae), is one of the largest mammals native to the forests and wetlands of southern North America and Central America and is categorized as `endangered' on the 2014 IUCN Red List of Threatened Species. This study reports, for the first time, the complete mitochondrial genome of T. bairdii and examines the phylogenetic position of T. bairdii amongst closely related species in the same family and order to which it belongs using mitochondrial protein-coding genes (PCG's). The circular, double-stranded, A-T rich mitochondrial genome of T. bairdii is 16,697 bp in length …

Adaptation And Countermeasures Of Label Manufacturing Companies In The Face Of The Growing Digital Printing Industry, Max Meehan

All Theses

In the constantly evolving landscape of the printing industry, the adoption rate of various technologies remains uneven, notably in digital printing. Although having existed for decades and increasingly matching the capacities of Flexography, label manufacturers have adopted digital printing within label manufacturing domains. This thesis delves deep into the history and operational mechanisms of Flexography and digital printing, shedding light on their innovative trends. By juxtaposing the capabilities of both methods through actual printed samples and comparing costs, we strive to discern the underlying reasons for companies either embracing or refraining from transitioning to digital printing. In conclusion, the research …

A Survey Of Code-Based Cryptography, Antsa Rakotondrafara

All Theses

One of the biggest concerns of the digital era is to keep data secure. With the rise of quantum computers, some of the problems that were considered hard will be solved in polynomial time. Therefore, efforts are taken to design practical cryptosystems that will resist attacks from both classical computers and quantum computers. In this thesis, we analyze three quantum-resistant code-based cryptosystems. We propose a new type of attack based on mixed-integer non-convex programming for the NIST submission FuLeeca.

Radiation Exposure Calibration Of The Al2o3:C With Radium-226 And Cesium-137 Using The Osl Method, Selma Tepeli Aydin

All Theses

Optically stimulated luminescence (OSL) dosimetry was utilized to calibrate Al₂O₃:C powder dosimeters, available commercially as the nanoDot® from Landauer Inc., and compare the dosimeter response to radium-226 (²²⁶Ra) and cesium-137 (¹³⁷Cs). The signal from the OSL was quantified using a microSTARii^® OSL reader also produced by Landauer Inc. Dose-response curves were developed for ²²⁶Ra and ¹³⁷Cs experiments (5 dosimeters each) at thirteen absorbed doses. Individual dosimeter response was tracked by serial number. Linear regression analysis was performed to determine if there were significant differences between the intercepts of the …

The Chemical And Physical Analysis Of Hiveless Tm A Plant Based Honey Alternative, Javin Goodine

All Theses

Honey is perhaps the oldest and one of the world's most widely used natural sweeteners. It is a viscous, sweet, golden substance bees produce via natural enzymatic and physical modification of flower nectar. It has long been prized for its unique flavor and medicinal properties. It can be incorporated into many applications, such as bread, cured meats, alcohol, condiments, candy, pharmaceuticals, and skin care products. In 2022 alone, America consumed over 600 million pounds of honey (Board Reports, 2023), but less than a fifth of that was produced domestically, the rest imported from other countries. The international honey trade can …

The Floral Thermal Environment: Physical, Morphological, And Environmental Determinants, And Their Impact On Plant-Pollinator Interactions, Jennifer Apland

All Theses

Anthropogenic climate change is driving major shifts in global temperatures and increases in extreme temperature events that contribute to reduced survival and species loss. To counteract extreme temperatures, many organisms can undergo geographic range shifts or engage in behavioral thermoregulation (e.g., movement to suitable microhabitats). While plants are sessile and thus subject to highly variable ambient temperatures, they have evolved mechanisms to regulate internal floral temperature. Floral thermoregulation may mitigate thermal stress on pollen and ovules and impact plant-pollinator interactions. These mechanisms for thermoregulation are often highly dependent on ambient temperature and solar radiation as most plants are not endothermic. …

The Effects Of Sous Vide Cooking And Cysteine Proteases On Instrumental And Sensory Textural Properties Of Lower Value Cuts Of Beef, Ian Smith

All Theses

Sous vide cooking has the potential to increase the value of lower quality cuts of beef. Understanding the textural properties following a cook-chill sous vide process is crucial to maximizing this potential. The use of enzymes may further increase the value of these products if able to positively alter the texture of the final product.

The first research objective was to use instrumental texture analysis to evaluate potential relationships between enzymatic treatments and sous vide processing time of lower value cuts of beef. Three cuts were evaluated: infraspinatus (top blade), semitendinosus (eye of round), and beef tongue. Infraspinatus and semitendinosus …

Creation And Validation Of A Novel Bayesian Calibration Method With Griddy Gibbs Sampling, Hannah Stewart

All Theses

Computer models of physical systems are widely used in lieu of, or in tandem with, experimental testing. It is critical to verify the accuracy of computer models through the process of calibration. Typical calibration methods are often computationally expensive and therefore cannot be performed in real time. This thesis presents a novel Bayesian calibration method using a Griddy Gibbs sampling algorithm to improve calibration speeds. This method was verified in two applications: a location-dependent dataset in the heat transfer analysis of an engine piston, and time-dependent tire forces in a drum test. The proposed method was directly compared to a …

Experimental Study On The Impact Of Low Thermal Inertia Thermal Barrier Coatings On Ppci-Diffusion Gci Combustion, Kunal Vedpathak

All Theses

The application of thermal barrier coatings (TBCs) has been studied in homogenous charge compression ignition (HCCI), conventional diesel combustion (CDC), and spark ignition (SI). Gasoline compression ignition (GCI) combines the low soot and NOx emissions of HCCI with combustion controllability through fuel stratification. GCI has become an interesting prospect due to the reduction in gasoline consumption due to the electrification and hybridization of the light-duty sector. It can be used as a preferred combustion mode in heavy-duty engines to reduce emissions with minimal modifications. GCI exhibits better combustion efficiency than HCCI. Advances in material technology have combined low thermal conductivity …

Phenology Of Asian Longhorned Beetle (Anoplophora Glabripennis, Coleoptera: Cerambycidae) In South Carolina, U.S.A., Lena Schmitt

All Theses

A new population of the Asian longhorned beetle (Anoplophora glabripennis Motschulsky, hereafter ALB), an invasive species in the United States since 1996, was discovered in Charleston County, South Carolina in 2020. This population is the furthest south ALB has been found in North America and provides an opportunity to examine the phenology of this beetle in a novel climate. I collected 1009 eggs, larvae, pupae, and adult beetles from the federal quarantine zone in South Carolina and used larval head capsule widths to determine the rate of development and voltinism of ALB in South Carolina’s coastal climate. With this …

Model Of Surface Waves On A Viscoelastic Material In A Cylindrical Container With Edge Constraints, Phillip Wilson

All Theses

A theoretical model is developed for the resonant frequencies and mode shapes of pinned edge surface waves on a viscoelastic fluid contained in a finite depth cylindrical container. A boundary integral approach is used to map the governing equations to the domain boundary. The surface waves obey an eigenvalue operator equation that depends on four dimensionless parameters: the cylinder aspect ratio, the Bond number, the Ohnesorge number, and the elastocapillary number. A solution is constructed using a Rayleigh-Ritz variational procedure over a constrained function space, which is able to effectively incorporate the pinned edge boundary condition. Mode shapes are defined …

Use Of Graphene Oxide Nanoplatelets As A Barrier Coating For Food Grade Packaging, Michaela Gibson

All Theses

The development and evaluation of graphene oxide (GO) coatings as a replacement for the aluminum foil layer in retort grade pouches is an important area of interest as we look to send humans to Mars. The packaging needs to not only restrict the permeation of oxygen and water vapor molecules, but also needs to be capable of thermally degrading. Compared to aluminum foil, which is responsible for the hermetic barrier properties of retort grade pouches, a GO coating is a more flexible barrier material and allows for ash-free incineration. Water-based and ethanol-based GO coatings were applied to polyethylene terephthalate (PET) …

Generalized Vulnerability Measures Of Graphs, Julia Vanlandingham

All Theses

Several measures of vulnerability of a graph look at how easy it is to disrupt the network by removing/disabling vertices. As graph-theoretical parameters, they treat all vertices alike: each vertex is equally important. For example, the integrity parameter considers the number of vertices removed and the maximum number of vertices in a component that remains. We consider the generalization of these measures of vulnerability to weighted vertices in order to better model real-world applications. In particular, we investigate bounds on the weighted versions of connectivity and integrity, when polynomial algorithms for computation exist, and other characteristics of the generalized measures.