Digital Commons Network^™

Privacy-Preserving Data Sharing For Learnable Encryption Artificial Intelligence In E-Health, Al Amin

Tennessee State University Alumni Theses and Dissertations

Healthcare AI requires large datasets for clinical-grade performance, yet privacy regulations prevent direct inter-institutional data sharing. While traditional federated learning (FL) enables collaborative training without centralizing data, it suffers from four critical limitations: accuracy degradation, gradient leakage vulnerabilities, high communication costs, and limited interpretability. Accordingly, the overarching research goal is to design a privacy-first FL framework for e-health that preserves clinical-grade accuracy on obfuscated data while substantially reducing information leakage, minimizing communication overhead, and enabling interpretable decision support without sharing weights, gradients, or raw pixels. This thesis systematically addresses these challenges through a three-method framework that progressively enhances privacy, efficiency, …

A Fault Tolerant Honeybee Behaviour Load Balancing Algorithm, Charmaine Adegbite

Tennessee State University Alumni Theses and Dissertations

Cloud computing enables flexible, scalable access to virtualised infrastructure but remains challenged by maintaining performance in fault-prone environments. Faults such as virtual machine failures can degrade task allocation and system reliability. However, traditional load balancing algorithms and bio-inspired strategies, including the Honeybee Behaviour Load Balancing algorithm, assume fault-free conditions. This thesis introduces a Fault-Tolerant Honeybee Behaviour Load Balancing algorithm that enhances the original Honeybee Behaviour Load Balancing algorithm by integrating fault detection. The proposed algorithm monitors the health of VMs and dynamically reallocates workloads when faults are detected which improves stability and reliability. The proposed fault tolerant algorithm was implemented …

Macroscopic And In-Situ Atr-Ftir Spectroscopic Studies Of Metformin Adsorption On Soil, Maheen Mehnaz

Tennessee State University Alumni Theses and Dissertations

Emerging contaminants might pose serious threats to the soil and water environment. Metformin, an emerging micropollutant, is one of the most widely used drugs for type-2 diabetes treatment. However, its waste disposal through human excretion is causing environmental concern to the soil and water environment. Yet, knowledge about the interaction mechanism of metformin with soil remains very limited. In this study, we evaluated metformin adsorption mechanisms on model oxide minerals (gibbsite, hematite) and two Tennessee soils (Milan Loring soil and Cheatham County soil) and in the presence of soil micronutrient (molybdenum) using in situ attenuated total reflectance Fourier transform infrared …

Interactive Effects Of Warming And Nitrogen Fertilization On Soil Respiration And Microbial Community Function, Aviyan Pandey

Tennessee State University Alumni Theses and Dissertations

Understanding the effects of multiple global change drivers, e.g., warming (W) and nitrogen (N) fertilization, is critical for accurately predicting ecosystem responses to climate change. This study investigates the main and interactive effects of soil warming and N fertilization on soil organic carbon (SOC), total nitrogen (TN), microbial biomass, extracellular enzyme activities (EEAs), and soil respiration (Rs) in a switchgrass (Panicum virgatum) cropland located in Middle Tennessee, U.S. The field experiment employed a split-plot design with two levels of warming (ambient and heated) and two levels of N fertilization (zero and 168 kg N ha-1yr-1). Hourly measurements of Rs, soil …

Factors Influencing Rural Teachers To Stay In The Classroom: A Qualitative Study, Marti Elizabeth Lomax

Tennessee State University Alumni Theses and Dissertations

The problem was teacher attrition was a pressing problem in the United States. The National Center for Education Statistics (2023) reported that 40% to 50% of teachers exited the profession within 5 years of commencing their careers which influenced the quality and consistency of education provided to rural students. The purpose was to explore how teachers felt about remaining on the job in rural classrooms in Southern Middle Tennessee. There was little research that investigated these teachers’ experiences regarding remaining in the profession. The study was guided by a basic qualitative design (Quick, 2024). The sample was six teachers selected …

The Impact Of Teacher Effectiveness Factors On Student Achievement: A Case Study, Renita Joy Perkins

Tennessee State University Alumni Theses and Dissertations

This quantitative, correlational study examined the relationship between teacher, evaluation scores and student achievement using Tennessee's Educator Acceleration Model (TEAM) evaluation system at Spencer Elementary School in rural Van Buren County. The study analyzed data from nine teachers across grades 3-5 and 150 students, investigating correlations between TEAM evaluation scores, Level of Effectiveness (LOE) ratings, and student performance on Tennessee Ready assessments in mathematics, English Language Arts, and science. Key findings revealed a counterintuitive experience-performance paradox: while teacher years of experience positively correlated with evaluation scores (r=.422, p<.001) and LOE ratings (r=.132, p=.024), it negatively correlated with student English Language Arts achievement (r=- .174, p=.039). The study demonstrated strong internal consistency within the TEAM evaluation system, with significant correlations between LOE scores and teacher evaluation ratings (r=.375, p<.001). However, only weak correlations emerged between teacher evaluation scores and student achievement outcomes, with a slight positive relationship found only in English Language Arts (r=.165, p=.049). The research revealed robust cross-subject correlations in student achievement (r=.706, p<.001), suggesting that effective teaching impacts learning holistically rather than in subject specific ways. These findings challenge assumptions about the predictive validity of observation-based evaluation systems and highlight the complexity of measuring teaching effectiveness. Implications for educational leaders include reconsidering the relationship between teacher experience and effectiveness, implementing differentiated professional development based on evaluation data rather than years of service, and developing more nuanced approaches to using evaluation systems that integrate multiple measures of teacher impact on student learning outcomes.

Biosynthesis, Characterization Of Curcumin-Capped Zno-Cuo And Chitosan-Curcumin-Capped Zno-Cuo Based Omaterial As Antibacterial Agent Of Escherichia Coli, Ahmad Fatoni, Afnita Fatmawati Umli, Reza Agung Sriwijaya, Hilma Hilma, Nurlisa Hidayati

Chimica et Natura Acta

The biofabrication of the chitosan-curcumin-capped ZnO-CuO and curcumin-capped ZnO-CuO oparticles, as well as their ability to combat Escherichia coli bacteria, were the focus of this study. Fourier-Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM) were used to examine the chitosan-curcumin-capped ZnO-CuO and curcumin-capped ZnO-CuO oparticles, respectively. Both were evaluated using the agar diffusion method as antibacterials against Escherichia coli. Results of analysis with FTIR, between 500 and 700 cm⁻¹, the functional group of Cu-O or Zn-O was seen at its highest point. The functional group of Cu-O and Zn-O in curcumin-capped ZnO-CuO was detected at wavenumber …

2025 December 11 - Tennessee Weekly Drought Summary, East Tennessee State University

Tennessee Climate Office Weekly Drought Summaries

No abstract provided.

In-Situ Investigations Of Calcium-Magnesium-Aluminosilicates (Cmas) Infiltration Effects On Thermal Barrier Coatings Under Extreme Environments Replicating Jet Engines, Zachary Stein

Doctoral Dissertations and Master's Theses

Calcium-magnesium-aluminosilicate (CMAS) particulates, such as sand or volcanic ash, are ingested by gas turbine jet engines during operation. When operating within high abundance regions, these particulates negatively interact and degrade the high temperature thermal barrier coatings (TBC) protecting underlying superalloy turbine blades vital to engine operation. These CMAS particulates melt within the engine and infiltrate into the ceramic coatings. In electron-beam physical vapor deposited (EB-PVD) TBCs, the CMAS within the intercolumnar gaps stiffens the coatings and causes thermomechanical induced high stress concentrations, risking crack formation. While molten, the CMAS thermochemically alters and destabilizes the coating, also risking coating failure. Premature, …

Parameter Informed Reinforcement Learning For Vehicle System Identification, Nathan Schaff

Doctoral Dissertations and Master's Theses

Accurate system identification is essential for modeling and controlling vehicle dynamics. This dissertation explores the application of Parameter Informed Reinforcement Learning (PIRL) as a novel approach to system identification (SYSID). PIRL integrates prior system knowledge, such as physical parameters, into reinforcement learning (RL) frameworks to improve estimation accuracy. The study begins with an overview of traditional SYSID methods and then introduces PIRL as a modification of standard RL. The research applies PIRL to short-period aircraft dynamics, demonstrating its effectiveness in both offline and online learning frameworks. The dissertation then further explores PIRL’s utility in an indirect model reference adaptive control …

The Effects Of Applying Self-Regulated Learning Prompts On Academic Achievement In A Public Middle-School Science Classroom, Andrew Barham

Doctoral Dissertations

Student success in science courses is a critical focus for K–12 educators, particularly during the transition period of middle-school, where students face increasing academic and social demands. Self-regulated learning (SRL) strategies have been shown to enhance academic outcomes by fostering independent learning and metacognitive awareness. However, research on the implementation and effectiveness of SRL interventions in middle school science classrooms, particularly within the constraints of public school settings, remains limited.

This study investigated the effects of an SRL intervention on the academic achievement of eighth-grade students during a six-week astronomy unit. Students from a public middle school in the San …

Assessing The Association Between Covid-19 Vaccination And Thrombotic Thrombocytopenia Syndrome (Attest Study): Analyses Of English Data, 2020-2022, Jose Ordonez-Mena, Xinchun Gu, Mark Joy, Xuejuan Fan, Bernardo Meza-Torres, William Hinton, Rashmi Wimalaratna, Gavin Jamie, Anna Forbes, Debasish Kar, Rachel Byford, Sneha N. Anand, Filipa Ferreira, Lisa Mather, Andrew Lee, F. D. Richard Hobbs, Deborah Layton, Simon De Lusignan

Peninsula Medical School

ObjectiveCOVID-19 vaccine surveillance detected thrombotic thrombocytopenia syndrome (TTS), a rare combination of thrombosis and thrombocytopenia, after COVID-19 vaccination. We evaluated TTS risk within 28 days of AZD1222 and BNT162b2 exposure.MethodsMatched case-control (MCCS) and self-controlled case series (SCCS) studies used Oxford-Royal College of General Practitioners Research and Surveillance Centre data linked to immunisation, hospitalisation and death data. English patient records extracted from 2/12/2020 to 31/10/2022 were used to identify TTS cases and age, sex, and practice matched controls. Conditional logistic regression and conditional Poisson regression were used for MCCS and SCCS analyses, respectively.ResultsOf 666 TTS events identified, >90% happened without AZD1222/BNT162b2 …

Enhancing Graduate Employability Through The Role Of The School Career Center (Bursa Kerja Khusus) At Smkn 1 Bandung, Dwi Purwanto, Didik Nurhadi, Widiyanti Widiyanti

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

This study examines the role of the Bursa Kerja Khusus (BKK) in enhancing graduate employability at SMKN 1 Bandung. Using a qualitative descriptive design, data were collected through interviews with BKK staff, teachers, alumni, and industry partners, supported by observations and document analysis. The findings reveal that BKK functions as a strategic bridge between school and industry by providing digital job information services, facilitating structured recruitment processes, and maintaining strong industry partnerships. These practices effectively support graduates’ transition into the workforce. However, challenges persist, particularly related to limited soft skills and occasional mismatches between school competencies and industry demands. Supporting …

Measurements Of Water-Film Thickness On Cave Walls And Speleothems, Alexandre Honiat, Salaheddine Skali-Lami, François Bourges, Bruno Lartiges

International Journal of Speleology

The water-film that coats cave walls and speleothems is a key player for the regulation of cave microclimate and the control of speleothem growth. In this paper, we demonstrate the capability of a confocal optical sensor to quantitatively measure on-site the rapid variations of water-film thickness when dripping, active condensation, or dryness occur on walls of various caves. Results obtained from a sample of four prehistoric caves and one stalagmite cave from Southwest France, indicate that the measurable thickness of water-films is generally in the 25-70 µm range for cave walls and reaches 200-300 µm on the horizontal plane of …

Artificial Intelligence And The Translation Of Culture-Specific Terms On Arabic Monolingual Signs At Aseer Tourist Sites, Saudi Arabia, Ali Mohammad A. Alghamdi, Bakr Bagash Mansour Ahmed Al-Sofi

UB Journal for Humanities

Artificial intelligence (AI) tools are increasingly used in various fields, including the translation of signs within linguistic landscapes. This field-based study investigates the performance of AI tools, namely, Google Gemini and DeepSeek, in translating culture-specific terms (CSTs). To this end, Arabic monolingual signs at tourist sites in Aseer region in Saudi Arabia were documented and a comparative content analysis approach was employed to evaluate the accuracy, cultural sensitivity, and contextual relevance of the AI-generated translations. These translations were then compared to human translations using the same criteria designed for independent human evaluation. The findings indicated that Gemini consistently outperformed DeepSeek …

Filling In The Gaps: How The Equal Employment Opportunity Commission Can Enhance Protections For H-1b Visa Holders, Mahi Patel

Northwestern Journal of Law & Social Policy

H-1B Specialty Occupations Visas allow numerous foreign nationals to obtain a pathway for entry into the United States through their hard-earned efforts and specialized skills. After meeting stringent requirements and completing complex processes, holders of H-1B visas may begin working in America. Unfortunately, when these individuals come to the land of opportunity, they encounter a harsh reality of employment: the incessant discriminatory abuse of H-1B visa holders by their employers. H-1B employees endure severe working conditions, long hours, unattainable deadlines, wage disparities, and racial biases as they navigate an unknown nation. Employers tend to exploit H-1B workers because these visa …

The Chemistry Of Color: A Comparative Analysis Of Natural And Synthetic Dyes In Textile Application, Caitlyn Pinaga Cpht

Honors Program Theses and Research Projects

The Chemistry of Color: A Comparative Analysis of Natural and Synthetic Dyes in Textile Application examines how color functions at the intersection of chemistry, culture, and environmental responsibility. This project traces the evolution of dyeing from ancient natural pigment traditions, rooted in ecological knowledge, agricultural practices, and cultural identity, to the industrial rise of synthetic dyes, whose laboratory precision enabled unprecedented consistency, brightness, and global textile expansion. Through experimental swatch analysis, the study compares the behavior of natural dyes derived from plants and food sources with modern fiber-reactive and synthetic dye classes on a range of fibers including cotton, bamboo …

Influence Of Build Plate Location On Tensile Properties And Residual Stresses In Lpbf-Fabricated Stainless Steel 316 Components, Yareli Zelaya Pavón

Honors Program Theses and Research Projects

Additive manufacturing (AM), particularly Laser Powder Bed Fusion (LPBF), enables rapid production of complex metal components with minimal waste. Stainless Steel 316 (SS316) is widely used in engineering applications due to its corrosion resistance and mechanical reliability. This study investigates the influence of build plate location on tensile properties and residual stresses in LPBF-fabricated SS316. Twelve tensile specimens and nine unsupported bridge structures were fabricated at different build plate positions using a “machine model.” Tensile testing provided stress-strain data to evaluate peak stress, elastic modulus, and strain at break, while bridge curvature measurements quantified residual stress through warping. Results indicate …

Development Of Microcrystalline Tests For Fentanyl, Clonazepam, And Diazepam Identification, Karis French

Honors Projects

Microcrystalline tests are chemical tests that involve the mixing of a substance with a specific reagent resulting in the formation of a crystal structure. Currently, microcrystalline tests are used as presumptive tests in forensic drug chemistry laboratories to provide the suspected identity of unknown substances. There is, however, a limited amount of research on this use of microcrystalline structures. Additionally, this existing research is outdated and does not include some of the newer commonly encountered controlled substances including fentanyl, clonazepam, and diazepam. This literature-based review attempts to identify reagents that could be used in microcrystalline tests for the identification of …

How “Cooling Off” Periods Endanger The Vulnerable: A 50-State Study Of Mandatory Separation Periods In No-Fault Divorce, Melody Mostow

Northwestern Journal of Law & Social Policy

Mandatory separation periods in no-fault divorce neither advance their stated policy goals nor comport with contemporary understandings of marital dynamics, domestic abuse, or child welfare. Although mandatory separation periods are held out as tools to promote reconciliation and deter impulsive divorces, such rationales lack empirical support. Because family law in the United States is determined at the state level, this Article examines state laws that require couples to live apart in varying restrictive capacities before obtaining a no-fault divorce. To that end, this Article presents the first comprehensive 50-state study of such requirements. Research demonstrates that these laws do not …

Understanding The Physiological Mechanisms Of Thermal Tolerance In Three Reef-Bulding Species Of Coral, Rachel Mccarty

Honors Capstone Projects and Theses

No abstract provided.

A Sedimentary Source Of Rare Earth Elements In The North Atlantic, Rylee D. Lindner

Electronic Theses and Dissertations

Individually and as a series, the Rare Earth Elements (REEs) are powerful geochemical tracers of environmental processes. However, ambiguities in the oceanic budgets of the REEs hamper their application. Growing evidence suggests a sedimentary benthic flux via the pore water is the major source of REEs to the ocean, with extrapolated estimates of this flux being equivalent in magnitude to that “missing” from modern budgets. However, existing pore water REE data are available from only a few locations globally with no representative dataset from the open North Atlantic. This data scarcity limits our ability to constrain flux estimates and understand …

Hot Ground State Cooling Following Ultrafast Photoisomerization: Time-Resolved Infrared Spectroscopy, James N. Bull, Mark H. Stockett, Pratip Chakraborty, Eleanor K. Ashworth, Anam Fatima, Vincent J. Esposito, Gregory M. Greetham, Partha Malakar, Stephen R. Meech

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

The ultrafast photophysics of many isomerizing molecules involves subpicosecond formation of a twisted hot ground state, which transfers energy to the environment through vibrational relaxation (cooling) over several picoseconds. In time-resolved infrared (TR-IR) spectroscopy, hot ground state transients show frequency shifts and band reshapings, which cannot be described through kinetic models that assume static spectral functions. We report a simple anharmonic cascade framework, which uses a single adjustable parameter associated with scaling the probability of vibrational energy transfer to the environment, for describing hot ground state cooling (HGSC) in TR-IR spectroscopy. The model is demonstrated against measurements on the cyan …

Advancing Sustainable Co2 Mitigation: Experimental And Computational Analysis Of Thermal Carbon Chitosan Sorbent For Automotive Exhaust Capture, Dalia A. Ali Dr., Amir Ahmed Elgamal Eng., Rania Rushdy Moussa Dr.

Chemical Engineering

This study investigated the efficiency of thermal carbon chitosan (TCCS) sorbent for CO2 capture from vehicle exhaust emissions within a designed adsorption system. TCCS was synthesized and meticulously characterized using a series of analytical techniques, including Brunauer-Emmett-Teller (BET) surface area analysis, Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Ther- mogravimetric Analysis (TGA), Energy Dispersive X-ray Spectroscopy (EDX), and Differential Scanning Calo- rimetry (DSC). The TCCS adsorbent showed high thermal stability and a heating value (HHV) of 23.5 MJ/kg. Adsorption isotherm study demonstrated that the maximum capacity of CO2 adsorption is 0.084 kg.CO2/kg. TCCS, as well …

Language Of The Law: Understanding The Impact Of Code-Switching Within Legal Fields Through Legal Blog Analyses, Kira A. Johnson

Honors Program Theses and Research Projects

Code-Switching is a linguistic phenomenon that can occur between different languages, cultures, or dialects. This study focuses on code-switching within the legal field, specifically through an analysis of legal blog websites. Through searching the terms, “code-switching” and “foreign language”, this study will compare legal blog websites in their coverage of the phenomenon. The various websites’ definitions of code-switching, how the topic is written with context, and what implications are suggested in the writing will be considered when crafting a comparative analysis. Individuals who communicate using different languages or dialects depending on situations and interactions are important to understand within the …

White Nose Syndrome In Bats And Infant Mortality In Georgia, Rhys Medcalfe, Sean Medcalfe, Simon Medcalfe

Journal of the Georgia Public Health Association

Background: White nose syndrome (WNS) is a disease in bats caused by the fungus Pseudogymnoascus destructans that can result in bat mortality rates of over 90%. WNS was discovered in Georgia in 2012 in 3 counties but has continued to spread to 14 counties as of 2023, with P. destructans detected in a further seven. Biodiversity loss has been linked to human health outcomes including infant mortality. Understanding the link between WNS, biodiversity loss, and infant mortality in Georgia is important because Georgia ranks 42^nd out of the 50 states for infant mortality rate.

Methods: Using panel data from …

Designing A Qi Initiative: Preoperative Bathing In The Ed For Adult Hip Fracture Patients, Mihyun Jang, Susan Maynard, Sheri Matter, Andrea Sillner

Biennial Convention (CONV)

Surgical site infections (SSIs) following hip fracture surgeries in adults are severe complications that increase morbidity, mortality, and healthcare costs. Preoperative bathing, particularly with chlorhexidine gluconate (CHG), reduces the risk of surgical site infection after hip fracture surgery by decontaminating skin flora, such as Staphylococcus aureus. Compliance with preoperative bathing protocols remains low, especially among adult patients admitted through emergency departments. To address the gap in preoperative bathing compliance, a quality improvement initiative will implement a preoperative bathing protocol using CHG wipes in the emergency department for adult hip fracture patients. Currently, there is a lack of evidence regarding the …

Challenges In Engineering Machine Learning (Software) Systems, Raffi T. Khatchadourian Ph.D.

Open Educational Resources

Lecture slides on the software engineering challenges unique to machine learning systems, for an undergraduate software engineering course. After contrasting traditional programming with machine learning, the deck examines why the usual tools for managing complexity—abstraction, reuse, and composition—are harder to apply to ML, given the lack of clear specifications and modularity. It covers concept drift, feedback loops (illustrated with crime-prediction and recommendation examples), and the accumulation of technical debt in ML systems, including the role and pitfalls of notebooks in moving from experimentation to production. Based on "Machine Learning in Production/AI Engineering" by Christian Kaestner and Eunsuk Kang (Carnegie Mellon …

Elementary Teachers’ Use Of Sphero Robots To Teach Computational Thinking, Marquita Jackson

Walden Dissertations and Doctoral Studies

The power of play has often been used in K–5 classrooms, but it has not always been implemented as a way to teach computational thinking skills. The use of educational robots such as Sphero have been explored, but not with young learners. The research problem addressed through this study was the lack of understanding of K–5 teachers’ experiences in using Sphero robots to teach computational thinking. The purpose of this basic qualitative study was to explore K-5 teachers’ experiences in implementing Sphero robot activities and specifically to teach computational thinking. The conceptual framework included Magana’s T3 model and Angeli’s computational …

Electrochemical Detection Of Aβ42 And Aβ40 At Attomolar Scale Via Optimised Antibody Loading On Pyr-Nhs-Functionalised 3d Graphene Foam Electrodes, Muhsin Dogan, Sophia Nazir, David Jenkins, Yinghui Wei, Genhua Pan

School of Engineering, Computing and Mathematics

Alzheimer’s Disease (AD) is one of the most commonly seen neurodegenerative disorders, where early detection of its biomarkers is crucial for effective management. Conventional diagnostic methods are often expensive, time-consuming, and highly complex, which highlights an urgent need for point-of-care biosensing technology. In this work, we developed assays on three-dimensional (3D) graphene foam electrodes by functionalising them with a 1-Pyrenebutyric acid N-hydroxysuccinimide ester (Pyr-NHS) to enable effective antibody immobilisation for the detection of amyloid beta peptides (Aβ42 and Aβ40), key biomarkers for AD. Pyr-NHS linkers were used for stable functionalisation, followed by binding with Aβ42 and Aβ40 antibodies, and then …