Digital Commons Network^™

Design And Evaluation Of Graphene Additives For Asphalt Materials To Improve Load Carrying Capacity And Durability, Oubayda Sras

Electronic Theses and Dissertations

Asphalt is the most common material used for road construction; however, asphalt has its downsides. Asphalt roads deteriorate with time due to (age hardening) and susceptibility to moisture damage shortening asphalt roads’ service life span; Hence, asphalt roads need to be resurfaced every 15-20 years, depending on maintenance. Asphalt binder short comings can be remedied by incorporating graphene (GNPs) and modified graphene (MGNPs) into the asphalt binder matric. This research study the effect of different GNPs surface modification on asphalt binder properties and performance, with three main surface modifications; oxidation, octadecylamine and aminopropylIsooctyl POSS. It also suggests a different criterion …

Increasing Mathematics Proficiency And Growth Through Focused, Data-Driven, Professional Learning, Joye Camille Cullen

Electronic Theses and Dissertations

In this dissertation, I aimed to improve elementary teachers’ mathematical instruction by enhancing their content knowledge and skills through the implementation of professional learning communities (PLCs) and professional development. The research design consisted of multiple evaluation steps conducted over time with a collaborative action plan the leadership team, mathematics specialist, and teachers developed. Quantitative and qualitative data were collected from participating classrooms and were analyzed at different phases of the program evaluation.

The scope of the study addressed the lack of content knowledge among elementary teachers, which led to gaps in instruction and difficulties in explaining to students advanced mathematical …

Design And Application Of Single And Multi-Gate Transistor-Based Analog Chaotic Maps, Maisha Sadia

Electronic Theses and Dissertations

Rapid advancement in technology has led to an increase in security threats, such as side-channel attacks and reverse engineering, which can potentially leak sensitive data or code to malicious parties. To address these challenges, researchers harness the inherent complexity of chaos-based computing. Leveraging chaos offers several advantages, including logic obfuscation, mitigation of power analysis attacks, and encryption of images and data.

The motivation has been to design hardware-efficient circuits that meet modern systems’ power, area, and performance requirements and provide enhanced security. We have introduced our novel one-dimensional discrete chaotic map circuits, designed using a 45nm CMOS process, although the …

Particle Image Velocimetry Investigation Of Flow Around Grooved Cylinders, Jhalak Dhakal

Electronic Theses and Dissertations

This thesis presents an experimental study of the flow around a grooved cylinder in an internal flow passage with a square cross-section. The effects of groove parameters, such as groove diameter (depth) and orientation (streamwise and longitudinal), on the wake characteristics and the pressure drop across the cylinders are investigated. Three Reynolds numbers of, 1230, 2000, and 2825, are tested. Particle image velocimetry (PIV) and cross-correlation techniques were used to measure the velocity fields and visualize the flow patterns. The results show that streamwise grooved cylinders with larger groove diameters (H2.0, H2.5, and H3.0) have reduced wake length and width …

On Security And Privacy In Machine Learning, Thomas Cilloni

Electronic Theses and Dissertations

In recent years the use of social media platforms, surveillance cameras, and vision-enabled devices and services has increased exponentially. While the mere use of a device or service is not a privacy issue, Machine Learning use has also drastically increased, and it exposes a number of privacy and security threats, especially towards online users. Privacy legislation around the world prohibits to use of data unfairly, but the conversion of laws to technical applications is often subject to interpretation. Such ambiguity opens a gap for data owners to potentially misuse data, violating end users’ privacy.

The overall objective of this doctoral …

Can Graphene-Coated Sand Enhance Water Reuse By Improving Water Quality In The Presence Of Municipal Treated Wastewater?, Madelyn Barber

Electronic Theses and Dissertations

The need for alternative water sources is dramatically increasing. Therefore, it is essential to develop alternative water sources to meet the current water scarcity challenges. Water reclamation, recycling, and reuse involving treated municipal and or animal wastewater address these challenges by resolving water resource issues and creating new sources of high-quality water supplies. However, the presence of bacteria, high levels of nutrients, and turbidity, as well as the occurrence of chemicals of emerging concern (CECs) in the treated wastewater, combined with the willingness of the public to use treated wastewater can undermine the wide application of water reuse. Implementing affordable …

Geochronological, Geochemical, Petrographical, And Structural Analysis Of The Northeast Bighorn Mountains, Sheridan County, Wyoming, Usa, Robert Charles Andreoli

Electronic Theses and Dissertations

The goal of this project was to produce geologic maps of the Skull Ridge, and Dayton South, Wyoming 7.5-Minute Quadrangle (Scale 1:24,000), from the northern Bighorn Mountains, Wyoming Cratonic Province (WCP). Detailed analysis of the geology within these quadrangles was performed using geochemistry, geochronology, thin section petrography, and structures of geologic units. The Bighorns are divided into northern and southern sections where the north is characterized by an Archean felsic batholith with cross-cutting plutonic dikes, and the south is composed of an Archean gneiss complex. The basement rocks in this area were formed ~2900-2500 Ma during a series of geologic …

Neverender, David James Gambino

Electronic Theses and Dissertations

This is a work of fiction exploring the Global War on Terror from the perspective of US aircrew servicemembers.

Development And Characterization Of Cannabidiol And Rho Kinase Inhibitor Combination Formulations For Ophthalmic Use, Mihir Sanjay Ghonge

Electronic Theses and Dissertations

Glaucoma, the leading cause of irreversible blindness globally, is a neurodegenerative disease marked by progressive death of the retinal ganglion cells in the eye. In 2018, FDA approved a 0.02% ophthalmic solution of netarsudil mesylate (NM), Rhopressa®, a rho kinase inhibitor, for the reduction of intraocular pressure in patients with glaucoma or ocular hypertension; the first new drug class in more than two decades. Cannabidiol (CBD) has been studied for its effects on intraocular pressure since the 1980s. In 2022, a study established that topical administration of CBD (1% w/v) decreased the intraocular pressure in pigmented Dutch Belted Rabbits. This …

Nursing Faculty Turnover: Recruitment And Retention At Jones College, Alan Luke Hammonds

Electronic Theses and Dissertations

The nursing profession has been facing a deficit of nurses for many years (Denehy, 2000; Haddad et al., 2023, Mayo, 1944; Schorr, 1980; Theisen & Pelfrey, 1990). Nurses are an essential part of the medical care system. They are responsible for most of the functions associated with healthcare. The schools that train nurses are as much affected by the shortage as the industry itself. With fewer nurses in the medical field from which to draw, nursing schools have had a difficult time maintaining nursing faculty levels to meet the needs of the medical community. With nursing faculty shortages already straining …

Food Retailing In Mississippi, 1895-2000, James R. Gulley

Electronic Theses and Dissertations

This thesis is a history of the evolution of the grocery industry in Mississippi in the twentieth century. I used primary source interviews, analysis of newspaper articles and advertisements, U.S. Census data, archival materials, and secondary sources to inform the thesis. The research focuses on an urban market in Jackson, Mississippi, and a rural market in Philadelphia, Mississippi. This history also concentrates on two Mississippi-based supermarket chains, Jitney-Jungle and Sunflower, and the families that founded them. The thesis argued that the innovations in grocery retailing during this era improved the lives of all Mississippians by lowering the cost of food, …

Characterization Of Vibrational Response Of A Helical Coil Subject To Environmental Exposure And Structural Modifications, Nathan Hill

Electronic Theses and Dissertations

In an effort to fully characterize the response of a cylindrical helix, the heat and vibrational stresses are modeled using both simulations and experimental testing. The intent of this work is to identify the frequencies, shapes, and Q factors of the vibrational modes of the helix subject to different stimuli and evaluate changes due to environmental exposures and structural modifications. COMSOL Multiphysics is used to simulate the response of the helix under different boundary conditions. Experimental measurements of the response to impulsive and continuous wave stimuli are taken. The eigenfrequency data from the simulations and experiments are then compared for …

Development Of Gastroretentive Floating Pellets Using Hot Melt Extrusion, Mengwen Li

Electronic Theses and Dissertations

This work aimed to develop a novel gastroretentive floating drug delivery system based on non-effervescent technology using hot melt extrusion technology to synergize gastric floating and bioadhesion strategies to achieve extended drug release. All components of the formulations including the active pharmaceutical ingredient (API) of the drug (theophylline), the polymers acting as a floating matrix and achieving the adhesive function (chitosan, HPC HF, HPMC K4M, and PEO N80), and the gas generating agent sodium bicarbonate were directly fed into the hot melt extruder to prepare the novel gastroretentive pellets. The uniformity of all formulations met the United States Pharmacopeia criteria. …

Evaluating The Relationship Between Vegetation Types And Downscaled Surface Soil Moisture Data, Anupiya Vidarshana Ellepola

Electronic Theses and Dissertations

Remote sensing systems such as multispectral and radar imaging can provide detailed information about soil moisture levels, vegetation cover, and topography. These data can be used to identify areas of high soil moisture, monitor changes in soil moisture over time, and assess the impact of human activities on watersheds. A commonly used system in orbit for monitoring soil moisture is the Soil Moisture Active Passive Mission (SMAP). For SMAP and all spaceborne systems, one of the major limitations for users to implement satellite-based data is the coarse resolution of the pixels (~9 km). Downscaling approaches are introduced by many researchers …

Teachers' Experiences Implementing The 2018 Mississippi College And Career Readiness Standards For Science, Lydia Lytal

Electronic Theses and Dissertations

Teachers have had to use standards to teach with since the 1980’s. The CCRS has made a significant shift in how standards are written and the expectations of students in learning them. With the three-dimensional design, teachers are required to change their pedagogy in order to implement the standards with fidelity. That requires training, support, and resources for the teachers. The purpose of this study was to provide insight in the experiences of high school teachers in Mississippi as they implemented the standards. Additionally, the researcher revealed emotions related to implementation and differences related to teachers in a tested subject …

Implementation Of Online Learning In Physical Therapy Graduate School: Multimethod Examination Of Physical Therapy Students' Perception, Ryan Mcglawn

Electronic Theses and Dissertations

The shift to online learning due to the COVID-19 pandemic has brought about significant changes in the way education is delivered. The online environment provides a new avenue for physical therapy education. With a majority of undergraduate students taking at least one course online, their perceptions of online learning are critical in the development of online physical therapy education. This study aims to investigate the University of Mississippi Medical Center (UMMC) entry-level physical therapy students’ perceptions of online learning. The study sample will include approximately 150 students comprised of 3 cohorts of 50 students. The study is a multimethod examination …

Detection Of Rayleigh Faded Signal Using Two Distributed Sensors, Sayantan Saha

Electronic Theses and Dissertations

Distributed detection(DD) is an area of interest in the Cognitive Radio(CR) Network domain. With the help of geographically dispersed sensors and a Fusion Center(FC) (i.e. the network element which generates the global network decision), a DD system can determine the presence or absence of a primary user signal. This prevents any harmful interference by a secondary user who is trying to gain access to the unoccupied spectrum opportunistically. DD system gained its popularity in spectrum analysis due to the limited bandwidth of the reporting channels between the sensors and their fusion center.

Why And How Do Sports Consumers Engage With Non-Fungible Tokens (Nfts)?, Seomgyun Lee

Electronic Theses and Dissertations

The advent of non-fungible tokens (NFTs) heralds a new era for digital collections. Based on blockchain items and a tradable market, the National Basketball Association (NBA) Top Shot program, for example, provides several digital assets containing moments of NBA highlights. By the second quarter of 2021, NBA Top Shot had attracted one million consumers and produced more than $800 million in sales. Following its success, several other North American sports leagues entered the NFT sector, such as the National Football League’s All Day and Major League Baseball’s Candy programs. As new and complementary avenues for fan engagement, sport-related NFTs have …

The Effects Of Google Smart Compose On The Process Of Open-Ended Writing, Sijan Shrestha

Electronic Theses and Dissertations

Recently, a lot of new natural language models have been developed which help individuals with writing. One of the widely used tools is Google’s Smart Compose which is a text-predictive system that helps individuals to write by reducing the need for repetitive typing. Though this tool has been well established and used by a lot of people, there is a lack of studies on its impact on open-ended writing.

In this thesis, we investigate the effect of Google’s Smart Compose in open-ended writing. To do this, we built a custom software that collects data while the users are writing on …

Navigating To The Top: Career Success Experiences Of Black Women Senior Leaders In Higher Education, Gladys R. Peters

Electronic Theses and Dissertations

The career advancement for Black women in higher education is not the same as their counterparts. Gender equity practices fail to challenge homogenous professional communities limiting how race and gender influence leadership advancement for Black women career trajectories. Black women who occupy positions of institutional influence and authority as senior leaders have largely been overlooked in in higher education research. Using a qualitative exploratory approach, this multiple case study explored the lived experiences of 10 Black women presently working in senior leadership roles in four-year public institutions of higher learning. This study sought to contribute to a deeper understanding of …

Unveiling Mississippi's Artistic Souls: A Documentary Journey, Sandip Rai

Electronic Theses and Dissertations

This MFA thesis presents a short documentary film focusing on the lives and artistic processes of four distinct artists residing in Mississippi: Andrew Bryant, Anne Scott Barrett, Jared Spears, and Stephen Brown (5th Child). The film delves into the intricacies of each artist's creative journey, capturing their unique perspectives and offering invaluable insights into their artistic endeavors.

Over the course of more than a year, this documentary underwent numerous revisions and refinements to ensure its significance both to the public audience and, most importantly, to the featured artists themselves. As an artist, the filmmaker was deeply motivated to unravel the …

The Presence And Prevalence Of Underqualified High School Science Teachers In Mississippi, Shelby Ann Watson

Electronic Theses and Dissertations

With growth in STEM postsecondary programs and careers positioned as a national priority, ensuring that K-12 science classrooms are staffed with highly qualified teachers is an important step towards building student interest in STEM and preparing students for STEM careers. However, previous studies of out-of-field teaching have indicated that schools and districts across the country are hiring large numbers of underqualified teachers to fill high-needs positions, such as secondary science and mathematics. Complicating the issue is the fact that data regarding teacher shortages, vacancies, and underqualified teaching are often incomplete or inaccessible. Prior studies have found that underqualified teaching is …

High-Resolution Hybrid Printing Of 3d Electronics, Nusrat Yasmin

Electronic Theses and Dissertations

Highly integrated on-demand printed electronics have gained lots of popularity recently. Most of the fabrication methods that are currently used in the industry are constraints to one technology and also one material class. These also limit the geometry design and the resolution of the finished products. To address this problem, the hybrid printing process is a promising technique to effectively fabricate 3D electronics. Hybrid printing is the future of printed electronics.

In the study, a high-resolution (~100 microns) hybrid printing process has been developed which combines extrusion-based printing (EBP) and Electrohydrodynamic (EHD) printing with polymeric and metallic material respectively. In …

Genomic And Metabolomic Investigation Into Xenic Cyanobacterial And Algal Cultures From Northern Mississippi, Alexis Dawn Wagner

Electronic Theses and Dissertations

Cyanobacteria are well-known for their production of a vast array of secondary metabolites. Cyanobacteria are found in marine, aquatic, and terrestrial environments. Due to their production of an abundance of natural products, cyanobacteria may have significant applications in biotechnological, industrial, agricultural, and pharmacological fields. Although they have many beneficial implications, they are also known producers of Harmful Algal Blooms (HABs). These HABs can exude toxins into the marine environments, while decomposition of their biomass can create hypoxic zones. These HABs can lead to ecosystem destruction, wildlife death, and human health impacts. In order to better understand the metabolic capabilities and …

Full Bridge Modeling To Evaluate Effectiveness Of A Seismic Bearing On A Newly Constructed Bridge On I-55, Sandip Gupta

Electronic Theses and Dissertations

Infrastructure constructed should be safe and reliable. Bridges are essential infra structure used by large mass of people on a daily basis. Out of 617,000 bridges across the United States, 42% are at least 50 years old, and 7.5% are considered structurally deficient as per Infrastructure report card. 178 million trips are made on these structurally deficient bridges every day in the US. Thus, a bridge should be designed, not only for Strength and Service limit states, but also for Extreme limit states which includes earthquake. New Madrid Seismic Zone (NMSZ), located in southeastern Missouri, northeastern Arkansas, western Tennessee, western …

Livestock Wastewater And Air Quality Management Using Microalgae, Capacitive Deionization, And Biofilters, Augustina Kwesie Osabutey

Electronic Theses and Dissertations

Wastewaters play a significant role in the negative impact of phosphorus on the environment, such as eutrophication. However, phosphorus is a limiting nutrient essential for life which has gained global attention on productive technologies for phosphorus recovery. Several technologies have been developed for phosphorus removal and recovery from wastewater to help alleviate phosphorus loss to the environment. Capacitive deionization technology, which was earlier developed for water desalination and ion removal, is actively being explored for its ability to remove phosphorus from wastewater. This review describes capacitive deionization technology (CDI) and its various types. Significant attention is given to the use …

Assessing The Economic Feasibility Of Capturing And Utilizing Carbon Dioxide From Ethanol Production In South Dakota, Makiah Stukel

Electronic Theses and Dissertations

Since the Industrial Revolution, anthropogenic greenhouse gas (GHG) emissions have spiked dramatically, prompting discussions on climate change. Mitigating climate change requires significant reductions in global carbon dioxide (CO2) emissions as CO2 is the most abundant anthropogenic GHG. A process that assists in offsetting the exponential growth in CO2 emissions is carbon capture and storage (CCS). Integrating carbon capture technology into the ethanol industry can provide an economically feasible way to achieve net reductions in CO2 emissions. The proposed work investigates the economic viability of applying CCS technologies to the 16 ethanol facilities in South Dakota (SD) and quantifies the potential …

Evaluation Of Precision Ingredient Inclusion On Production Efficiency Responses In Finishing Beef Cattle, Santana R. Hanson

Electronic Theses and Dissertations

Two randomized complete block design feedlot experiments were conducted over the course of two years. These experiments were conducted to investigate the effects of 1) evaluate the observed-to-expected ratio for ingredient inclusion using no commodity inclusion assistance technology or using commodity inclusion assistance technology; and 2) evaluate the influence that varying degrees (highly variable at random or 0.454 kg asfed tolerance for each ingredient) of accuracy on ingredient inclusion have on growth performance, carcass traits, efficiency of dietary NE utilization, and ingredient inventory management in finishing beef cattle. Experiment 1 used single source Black Angus heifers (n = 60; initial …

On The Simulation Of Supersonic Flame Holder Cavities With Openfoam, Zachary Chapman

Electronic Theses and Dissertations

One of the next major advancements in the aerospace industry will be hypersonic flight. However, to achieve hypersonic flight, propulsion systems capable of reaching hypersonic speeds need to be developed. One of the more promising hypersonic propulsion systems is the scramjet engine, however, several problems still need to be explored before reliable scramjet engines can be produced, the biggest being keeping the engine ignited. This has led to the use of flame holder cavities to create a region of subsonic flow within the engine to allow combustion to occur. High experimental costs make the use of computational fluid dynamic (CFD) …

Effectiveness Of Atmospheric Cold Plasma In Inactivating Microorganisms, Nadee Shanika Kaluwahandi

Electronic Theses and Dissertations

In the food processing industry, Cold Plasma (CP) is an emerging green process with a number of potential applications. Cold plasma has mostly been used to reduce microbial counts in foodstuffs and biological materials as well as in different levels of packaging, particularly in cases where there is thermal sensitivity. Recent studies have demonstrated that CP technology is being developed for use in the food and agriculture industries. The primary focus is on the interactions between reactive species and food-borne microbes to inactivate them. The literature review discusses both proven and potential applications for cold plasma in food processing, as …