Digital Commons Network^™

How Organizational Structure And Power Dynamics Impact Decision Making—An Empirical Investigation Of General Manager Turnover In The National Basketball Association, Xiaoan Huang

Theses and Dissertations

This dissertation examines the factors affecting GM dismissals in the NBA. Although there is limited consideration of executives in sport, scholars argue that GMs play a critical role within professional sport organizations, as they are generally involved in both business and on-field operations of the team. While there is some understanding of the impact that GMs have on organizational performance in sports, there is a lack of consideration of the tenure of executives and the factors that lead to turnover in these positions. As such, there is a critical need for further examination of GMs in sport. Following power theory …

Optimization Of A Nanotechnology-Based System For The Treatment Of Electroplating Wastewater, Madeleine Mary Meyer

Theses and Dissertations

To protect humans and the environment, human actions that may expose living organisms to toxic metals are heavily regulated in developed countries. The use and production of toxicants in commercial applications is tightly controlled in the United States of America by federal and state laws. Due to this fact, United States manufacturing companies are required to control the amount of regulated toxicants that leave their facilities. Toxic metals in wastewater are heavily regulated by federal and state law, with manufacturing facilities permitted individually for the concentrations of metals they are allowed to discharge via their wastewater. From previous research conducted …

Three Essays On Environmental, Social, And Governance (Esg), Zhengwei Fu

Theses and Dissertations

This abstract synthesizes findings from three studies examining the impact of environmental, social, and governance (ESG). In essay one, using environmental regulatory enforcement data from EPA, I find that facility-level political connections are positively related to the likelihood of experiencing environmental regulatory enforcement. The effect is mainly driven by political connections related to Democratic senators. Consequently, politically connected facilities reduce their air pollution. The effect of political connection is diminished when the authority of senators over environmental regulatory enforcement becomes weaker after the 2017 presidential election. Heterogeneity analyses reveal that the impact of political connection is stronger in states with …

Applications Of Catalytic Ammonia Chemistry: From Low-Pressure Ammonia Synthesis To The Decomposition Of Tritiated Ammonia As A By-Product Of Magnetically Confined Nuclear Fusion, Jennifer Kules Naglic

Theses and Dissertations

Ammonia is the 2nd most produced chemical in the world with vital importance for its use in fertilizer as the global population has grown in accordance with the industrialization of NH3. While 80% of NH3 produced goes to fertilizer, it has gained attention recently as a hydrogen storage and transportation vessel. Industrially, NH3 is produced at high temperatures and pressures which in turn require high electrical input. Turning to a green NH3 cycle with low temperature and pressure membrane reactors for both NH3 synthesis and decomposition would allow for much lower energy input as well as a renewable energy to …

Investigation Of Ethane Dehydrogenation And Hydrogenolysis On Pt(111), Pt(211) And Pt(100): Bayesian Quantification And Correction Of Dft-Based Enthalpic And Entropic Uncertainties, Mubarak Bello

Theses and Dissertations

Computational investigations of heterogeneously catalyzed reactions using density functional theory (DFT) are often inaccurate, largely due to uncertainties in the choice of DFT functional (enthalpic uncertainty) and approximations for modeling adsorbate movement along the catalyst surface (entropic uncertainty). This work illustrates that both uncertainties are significant in the investigation of the ethane dehydrogenation (EDH) and hydrogenolysis on Pt catalysts by considering the complete deconstruction of ethane on Pt(111), Pt(211), and Pt(100) using microkinetic modeling (MKM). Hence, this work uses both non-calibrated and Bayesian calibrated MKMs to quantify and correct inaccuracies in macroscopic properties due to both uncertainties. A Bayesian approach …

Investigating The Mediating Effect Of Social Support In Team Sport Participation On Adolescent Mental Health Outcomes, Olivia Schmitke

Theses and Dissertations

Peer and non-familial adult supportive relationships are a critical part of healthy adolescent development, positively influencing psychological, behavioral, and social domains (e.g., Panza et. al., 2020). Extracurricular sports activities are a source of peer (e.g., teammates) and adult (e.g., coaches) relationships and are associated with favorable impacts on mental health which may be an impactful protective factor given the rise of mental health crisis in youth today. The present study aimed to clarify the relationship mechanisms underlying the benefits of sports participation by examining and effecting social support has on mental health outcomes in adolescents engaged in sports. In doing …

Using Youth Participatory Action Research To Scale Up Pre-Exposure Prophylaxis (Prep) In The Southern United States, Mariajose Jhamira Paton

Theses and Dissertations

The recently launched initiative, Ending the HIV Epidemic (EHE), provides a targeted plan to end HIV in the United States (US) by 2030, and prioritizes key demographic groups and geographic areas that are disproportionately burdened by HIV. Sexual and gender minority (SGM) youth, especially Black and Latiné youth (SGMBLY), are a key population for EHE as they have experienced the largest increase in new HIV rates in recent decades. States identified by EHE are disproportionately located in the Southern US, where increasing the uptake of pre-exposure prophylaxis (PrEP) for HIV has been a challenge. Though proven effective, youth participatory action …

Scenic Design: Learning How To Think Outside The Black Box, Ashley Jensen

Theses and Dissertations

During my time in the scenic design MFA program at the University of South Carolina, the most important thing I learned is how little I knew before starting this journey. This thesis will explore the challenges I faced and the growth I experienced through the pain of it all. I will demonstrate what I learned by going through each design process step-by-step, and how I became a better artist for it.

Surface Acoustic Waves-Based Point-Of-Care Biosensor, Debdyuti Mandal

Theses and Dissertations

A biosensor is an analytical tool consisting of biologically active material used in close conjunction with a device that converts a biochemical signal into a quantifiable electrical signal. The early detection of the disease biomarkers can enhance the increased curability of the disease, reduce healthcare costs, and finally, improve the quality of life for patients. Thus, for the following purpose, there is always a need for an effective biosensor as a diagnostic device. The biosensor typically consists of an actuator, a bio-recognition component, and a transducer that converts captured signals into a meaningful display. The bio-recognition component uses biomolecules to …

Altered Sensory Processing And Pain In Youth With Sickle Cell Disease: Risk Factors And Moderators, Julia Johnston

Theses and Dissertations

Introduction: Youth with sickle cell disease (SCD) experience recurrent pain and increased risk for chronic pain. Neuropathic pain, characterized by alterations to the central and/or peripheral nervous systems, is not well understood among youth with SCD. Based on our current understanding of pain systems and existing literature on pain in SCD, this study aimed to elucidate psychosocial correlates of altered sensory processing (ASP) and neuropathic pain, determine biomedical risk factors contributing to the development of ASP among youth with SCD, and identify how sensory processing and biopsychosocial factors collectively influence pain experiences by assessing two plausible models. Methods: Thirty-five youth …

Design And Development Of A Direct Medium Voltage Solar Pv Resonant Inverter, Parthkumar Sureshkumar Bhuvela

Theses and Dissertations

In a grid-tied photovoltaic (PV) system connected to a medium voltage (MV) grid, an inverter is generally employed with a line frequency transformer (LFT) to connect to the grid. These LFTs are large in size and weight, exhibit high cost and losses. In recent studies, the LFTs replaced by are by (high frequency transformer) HFT embedded in DC-DC converters. These DC-DC converters are used to boost voltage levels and DC-AC inverters are employed for MV inversion. This leads to high frequency switching at MV which increases losses in inversion stage. In this study, a novel MV grid-connected solar PV inverter …

Exploring Shape Dependency Of Catalysts For Chemical Reactions, Kaveh Shariati

Theses and Dissertations

Recent advancements in the synthesis of nanoparticles, particularly one-dimensional (1D) nanoparticles, have significantly enhanced the catalytic activity of various processes by enabling precise control over their morphologies and exposing unique crystallographic facets. The shape of nanoparticles is closely linked to their chemical, physical, electrical, optical, magnetic, and catalytic properties. This dissertation investigates the impact of 1D nanoparticle catalysts on two distinct and well-known chemical reactions. In the first part of the study, we explore the catalytic activity and selectivity of silver catalysts in the ethylene epoxidation reaction, which are intrinsically linked to their faceting. Silver nanowire catalysts representing Ag(100) and …

Multidimensional Simulation Of Cool Diffusion Flame, Ejaz Ahmed

Theses and Dissertations

Understanding the behavior of spherical cool diffusion flames in microgravity conditions is crucial for advancing combustion research. This knowledge has significant implications for both fundamental science and practical applications, such as spacecraft fire safety and the development of advanced, high-efficiency engines that benefit from low-temperature chemistry. Spherical cool diffusion flames are typically characterized by peak temperatures between 500 and 1000K and are often followed by the radiative extinction of a hot flame. Some low-temperature ignitions can sustain indefinitely at around 700K, leading to chain-branching pathways that produce intermediate species such as C2H4, H2O2, HO2, CH2O, CH3O, and HCO. In some …

Accelerating Numerical Modeling And Optimization Of Structural Mechanical Systems, Fatemeh Hashemian

Theses and Dissertations

This research proposal presents Bayesian optimization and reduced order modeling methods to accelerate numerical analysis and design of structure mechanical system. First, a holistic framework of Bayesian optimization (BO) based on parameterized numerical models and genetic algorithm-guided adaptive sampling is developed to automate and accelerate the design of a front-loading washing machine. The research aims to address challenges associated with the model parameterization and global optimization and design. A multibody dynamics model of the washing machine incorporating a set of 9 key design variables is developed. The design variables are implemented to enable automated modifications of the dynamics model for …

Understanding Stressors, Coping Strategies, And Physical Activity Among African American Women Using Ecological Momentary Assessment, Asia Brown

Theses and Dissertations

Psychological stress is a normal part of the human experience and can be adaptive in certain contexts. However, chronic, cumulative, or uncontrollable stressors, such as those associated with living in poverty or being a member of a marginalized group, contribute to pervasive inequities among African American women including lower rates of physical activity. Given the social and political forces that continue to shape inequities, and which have exacerbated Covid-19’s impact on African Americans, it is important to gain a better understanding of how this population is experiencing and coping with current stressors, many of which are embedded within the social …

Sleep Quality And Quantity Assessment Among African American Survivors Of Lung Cancer With And Without Chronic Obstructive Pulmonary Disease (Copd), Amanda Rae Myhren Dyer

Theses and Dissertations

Introduction: Improving the quality of life of survivors of early-stage lung cancer (NSCLC, Stages I - IIIa) requires attention to persistent, burdensome symptoms, including sleep disturbances. While research exists regarding sleep quality, sleep quantity, and sleep disturbances in cancer survivors, minimal research targets this minority survivor population. The purpose of this study was to measure and assess sleep quality, sleep quantity, and sleep disturbances among African American survivors of lung cancer. Based on the Symptom Management Theory, our comprehensive assessment focuses on a racial minority group and multiple diagnostic groups (COPD vs. No COPD). Methods: This two-group, cross-sectional, descriptive study …

Decisions, Decisions: Dna Damage Induced Modification Of P53 And The Effect Of Modifications On P53 Differential Binding To The Dna, Savannah Gabrielle Keating

Theses and Dissertations

p53 is the most frequently mutated tumor suppressor protein in cancer. It is highly regulated, most often via post-translational modifications (PTMs). Different pathways and target genes are differentially activated by p53 and there is much left to understand how this occurs. The regulation of p53 at the post-translational level is incredibly important to its DNA damage response, and, therefore, it is understood that PTMs are often involved in the differential activation of pathways by p53. This project aimed to identify some of the types and locations of post-translational modifications on p53 in response to different modes of DNA damage with …

Enabling Novel Nanopore Sensing Approaches For Personalized Medicine Through Chemical Modifications To Analytes, Zehui Zhang

Theses and Dissertations

Nanopore sensors have garnered significant attention recently, not only for their groundbreaking advancements in single-molecule DNA sequencing but also for their diverse applications in stochastic sensing, single-molecule chemistry, and protein unfolding. The interaction of single molecules with the nanopore sensing interface leads to characteristic ionic current modulations, reflecting the composition, charge, distribution, structure, and sequence of the translocating molecule. With the electrical resistive pulse nanopore sensing, its single-molecule sensitivity and specificity have opened doors to numerous potential applications in personalized medicine. I will discuss recent advancements in the sensitivity and specificity of personalized medicine using nanopore sensors, focusing on proteomic …

Social-Ecological Determinants Of Affective States Among College Students: A Cross-Cultural Ecological Momentary Assessment Study, Abhishek Aggarwal

Theses and Dissertations

Background: College students experience a complex and diverse array of stressors during their college life, making them vulnerable to severe mental health issues. Momentary affective states are linked to major mental health disorders and overall well-being; however, the current social-ecological model of affect lacks a temporal dimension, failing to account for within-person dynamics of affective states over time. This study disentangles the complex temporal dynamics among the momentary, multilevel social-ecological factors and affective states in the real-world setting of college students across the United States (US) and India. However, establishing invariance of the affect model across time, people, and cultures …

Evaluation Of Mechanism Of Action And Toxicity Of Novel Psychoactive Substances (Nps) Identified As Cannabinomimetics, Robert Michael Sears

Theses and Dissertations

Synthetic cannabinoid receptor agonists (SCRA), also referred to as synthetic cannabinoids (SCs), pose a significant public health risk, create an undue burden on local emergency departments, and present significant challenges for law enforcement officers and forensic laboratories. SCs are a diverse group of compounds sold with the intent to illicit psychoactive responses like tetrahydrocannabinol (THC), the primary psychoactive component in marijuana. Since their initial detection in 2004, illicit use of SCs has grown in popularity. Recognizing the dangers of SC use, the Drug Enforcement Agency has moved to schedule the analytes routinely identified in street drugs. Despite these efforts, the …

Accessory Eyes And Dynamic Color Change In Palaemon Vulgaris, Nicholas Raymond Steichmann

Theses and Dissertations

Eyes are physiologically costly organs to produce and maintain, making the development of secondary eyes intriguing. Caridean shrimp possess reflecting superposition primary eyes, but some species across fourteen families possess an additional pair of eyes called accessory eyes along the dorso-posterior margin of the primary eyes. Secondary eyes are found in lizards, lampreys, and insects, where they often function as illumination detectors. Some shrimps may use accessory eyes to signal endocrine organs in their eyestalks to alter the pigmentation of their carapace providing better camouflage through disruptive coloration. To investigate the role of accessory eyes in dynamic color change we …

Essays In Labor Economics, Inclusion, And Diversity, Saharnaz Babaei Balderlou

Theses and Dissertations

This dissertation presents a comprehensive analysis of various teacher staffing policies and their impact on teacher retention and turnover. It comprises three studies, each addressing a unique aspect of teacher staffing challenges in the United States and in South Carolina. Chapter 2 investigates how different salary structures (frontloading vs. backloading) affect teacher turnover in South Carolina. Using a Difference-in-Differences (DID) approach and data from FY2014 to FY2023, the study finds that frontloading salary schedules do not significantly impact overall teacher turnover, with negligible effects on novice teachers. However, the impact varies with district characteristics: specifically, frontloading may reduce turnover in …

Enhancing The Security In High-Speed Networks Using P4 Programmable Switches, Ali Alsabeh

Theses and Dissertations

Network security has become increasingly essential in today's networks due to the growth of various network applications, such as Machine Learning (ML) and Fifth-Generation (5G) Networks. One fundamental Internet protocol is the Domain Name System (DNS), which maps domain names to Internet Protocol (IP) addresses. Despite its importance, DNS traffic is often forwarded without being analyzed, making it a center of ever-evolving attacks. Traditionally, defense strategies are implemented on fixed-function security middleboxes that are costly, proprietary, and hard to manage. Alternatively, defenses implemented in software use general-purpose servers (e.g., the control plane of a Software-Defined Networking (SDN) network) that cannot …

The Role Of Nr4a Transcription Factors In The Body And Their Effects In The Pancreatic Beta Cell, Jacob A. Herring

Theses and Dissertations

A central aspect of type 1 and type 2 diabetes is decreased functional β-cell mass which leads to systemic glucose dysregulation. Functional β-cell mass takes into account β-cell insulin secretion, β-cell proliferation, and β-cell survival. Several treatments are currently used to help maintain glucose levels in individuals with diabetes. However, cures for these diseases are not available due to inability to expand functional β-cell mass. Transcription factors control expression of target genes critical for various functions, and transcription factors that control β-cell function, proliferation and survival play a significant role in β-cell development and function. A more thorough examination of …

Patient-Specific Hemodynamic Modeling For Optimizing Left Ventricular Assist Device And Right Heart Health, Holly Felice Grant

Theses and Dissertations

LVAD speed optimization is essential for efficient LVAD therapy and to minimize complications. However, the ideal LVAD speed is unknown and must be tailored for each patient. The interplay between the LVAD, systemic, and pulmonary circulations is critical and should be considered during optimization. A computational hemodynamic model that can be tailored for each patient may provide clinicians with useful guidance and reduce the need for repeated invasive studies. This study sought to customize and evaluate a patient-specific LVAD hemodynamic optimization model.

We conducted a retrospective analysis on 25 patients implanted with HM3 and who underwent right heart catheterization (RHC) …

Existence Of Smooth Solutions For The Landau Equation With Hard Potentials, Shelly Ann Taylor

Theses and Dissertations

This dissertation is concerned with the Landau equation, an integro-differential equation that models the particle density of a plasma as it evolves in phase space. The main topic is the (large-data) local existence of classical solutions to the Landau equation in the case of hard potentials (γ ∈ (0, 1]). Solutions have previously been constructed by Chaturvedi [SIAM. J. Math. Anal., 55(5), 5345–5385, 2023] for initial data in an exponentially-weighted Sobolev space of order 10, but it is not a priori clear whether these solutions have more regularity than the initial data. We improve Chaturvedi’s existence result in two ways: …

Increasing Optical Channel Capacity By Integrating Pam4 Modulation With Wavelength Division Multiplexing And Spatial Domain Multiplexing, Swaroopini Harish

Theses and Dissertations

Spatial division multiplexing (SDM) is a technique used in telecommunications and networking to increase data transmission capacity over optical fiber communication channels. This multiplexing technique spatially reuses optical frequencies by allocating different spatial locations for inputs based on their inject angles. The signals travel in a helical pattern within the carrier fiber and exit as concentric rings. SDM enables more efficient utilization of available bandwidth and improved communication performance. In four-level pulse amplitude modulation (PAM4), each symbol represents a combination of four possible signal levels instead of the two levels in binary modulation. The four levels are denoted in different …

Parallel Communications In Single-Core Optical Fibers Utilizing Spatial Domain Multiplexing And Wavelength Division Multiplexing, Mingxuan Tu

Theses and Dissertations

This endeavor proposes a hybrid parallel optical communication architecture in single-core fibers combining WDM in O-band (1270 nm, 1310 nm, 1310 nm, and 1330 nm) and two-channel SDM. The proposed architecture applies carefully designed delays in each propagating channel to achieve synchronization and, therefore, realizes parallel transmission in single-core fibers without the help of Serializer/De-serializers (SerDes). A mathematical model of SDM, calculations on delays between each optical channel, simulation of the hybrid architecture, experimental setup, and the testing and analysis of channel performance have been provided. A design of a photonic integrated circuit based on thin film lithium niobate electro-optic …

Reality In Motion: An Audio Documentary Exploring The Fluid Essence Of Life, Alessandro Bonaiuto

Theses and Dissertations

Reality in Motion is a science communication project that aims to create an audio documentary based around the theme of movement in various aspects of life, both human and non. The project is a 30-minute podcast that explores the topic of life and movement through the lens of smaller stories. Guided by a main narrator, with the intervention of experts, Reality in Motion seeks to provoke thought and inspire curiosity about the intricate dynamics that shape our world.

Engine Performance Of An Electric Airplane With Partial Battery Capability, Hannah Yasmine Scrivens

Theses and Dissertations

As electric aircraft are developed and certified, knowledge of electric aircraft performance during complete or partial battery failures can be useful to determine an aircraft’s limitations and capabilities of completing an emergency landing, especially during takeoff and low-altitude climbs, as well as fully characterizing the potential aircraft performance. The results of this research will be useful in developing regulations and procedures pertaining to energy reserves and emergencies. This paper presents the results of a Pipistrel electric airplane climb power ground test that was conducted by the author and Florida Tech faculty. In the test, one of the airplane’s batteries was …