Digital Commons Network^™

Computational Fluid Dynamics Analysis Of Thermal-Hydraulic Phenomena In Nuclear Reactor Systems, Mehedi Hasan Tusar

Masters Theses

"A computational analysis of thermal-hydraulic processes in nuclear reactor systems is performed, leveraging Computational Fluid Dynamics (CFD) to advance the design and ensure the safety of nuclear reactors. Divided into two primary sections, the initial part examines thermal-hydraulic behavior in the Replacement Research Reactor (RRR) operating at 20 megawatts and evaluates potential enhancements for the Missouri University of Science and Technology Reactor (MSTR) to operate at an increased capacity of 2 megawatts from the existing 0.2 megawatts. Detailed simulations reveal insights into flow characteristics, temperature distributions, and pressure drops, highlighting the effective use of realistic and porous media modeling techniques …

Development Of A Particulate Matter Sensor Network For Air Quality Monitoring In Indoor Settings And In Mines, Abdulrahman Bani

Masters Theses

"The importance of indoor air quality (IAQ), especially concerning particulate matter (PM), has become increasingly recognized due to its substantial impact on public health. Individuals spend a significant portion of their time indoors, where PM concentrations can exceed that of outdoors, leading to potential adverse health effects ranging from immediate irritation to long-term respiratory and cardiovascular diseases. The dynamic nature of indoor environments, combined with the diversity of PM sources, presents considerable challenges for effective IAQ monitoring and management. Traditional approaches to IAQ assessment often fall short, lacking the granularity and immediacy required to address these challenges adequately.

This abstract …

Fe-Ni-Cu-Pge Sulfide Transport Mechanisms And Carbon-Sulfur Interactions In Lower Crustal Magmatic Settings: A Study From The Valmaggia Ultramafic Pipe, Ivrea-Verbano Zone, Italy, Shelby Leann Clark

Masters Theses

"Constraining the processes that control the transport and deposition of sulfides in the deep lithosphere is an important step in expanding ore deposit exploration search space to include exhumed lower crustal rocks. The ultramafic sulfide ore-bearing Valmaggia pipe in the Ivrea-Verbano Zone of NW Italy, an exhumed cross section of the overlying lower continental crust and subcontinental lithospheric mantle, gives critical insight into metallogenic processes in lower crustal settings. The ~300 m wide metasomatized pipe hosts Fe-Ni-Cu-(PGE±Co±Au) sulfide mineralization that is commonly associated with locally abundant carbonates and hydrous silicates (phlogopite, amphibole). Previous studies suggested that sulfides were physically transported …

Iterative Power Flow Control Architecture For Dc-Ac-Ac Triple Active Bridge Converters: Design, Simulation, And Hardware Testing, Jonathan Henri Saelens

Masters Theses

Driven by widespread electrification and escalating energy demands, efficient and cost-effective converter systems are necessary to maintain and improve our nation's electrical grid. Facilitating this necessity are power electronic converters in applications such as smart grids, renewable energy integration, and electric vehicles. Guided by the demand for improved converter topologies and conversion efficiency, much research has been conducted on varying designs, development, and control implementations. One such topology gaining significant research attention is the triple active bridge (TAB) converter. The TAB is a three-port power converter enabling both bidirectional power flow on each port and galvanic isolation for safety and …

Learn From The Past: Using Peer Data To Improve Course Recommendations In Personalized Education, Colton Walker

Masters Theses

"This work describes a recommendation approach designed to enhance student success by identifying semester schedules and graduation paths. The primary objective is to provide personalized graduation path recommendations rooted in individual student performance and draw insights from the academic journeys of similar students who successfully graduated. The original research contribution of this work lies in the development of a graduation path recommender system that leverages a combination of Markov Decision Process, Q-Learning, and collaborative filtering techniques to pinpoint graduation paths with a higher likelihood of leading students to success based on their academic progress thus far. The effectiveness of the …

Teacher Self-Efficacy And Teaching Experience, Nicholas Daniel Hafner

Masters Theses

Teacher self-efficacy significantly impacts student learning in a variety of ways. High levels of teacher self-efficacy can lead to improved student outcomes and act as a protective factor for multiple stressors. The present study investigated the associations between teachers’ years of experience and their hours of professional development concerning a teacher’s overall self-efficacy and its three domains: student engagement, instructional strategies, and classroom management. It was hypothesized that years of experience and hours of professional development would predict overall self-efficacy and its three domains. A survey was utilized to gather demographic, experience, and self-efficacy information. A total of 194 teachers …

Teachers’ Perceptions Of Their Role In Supporting Students’ Mental Health Needs, Rachael Mcdonough

Masters Theses

Mental health issues are highly prevalent among children and adolescents and have recently increased in the wake of the COVID-19 pandemic. Evidence shows a research to practice gap in the area of mental health practices and interventions in schools. As teachers are frontline gatekeepers for identifying mental health issues in students, it is important to understand current teachers' perspectives regarding their role, knowledge, and training. Thus, the current study sought to explore teachers’ perceptions regarding their role in supporting student mental health needs and the barriers that may prevent them from doing so. In the current study, general and special …

Development Of A Novel Bioink For Human Vascularized Organoids, Bradley Allen Bromet

Masters Theses

"There is a need for a model to better mimic human physiology in the clinic, so the objective was to develop a novel bioink for a 3D tissue model to study human disease and development in a dynamic 3D environment. The results from each corresponding study helped in developing a novel bioink for use in a bio printed human vascularized organoid. The bioink composed of alginate with other natural hydrogels to function as extracellular matrix and with the addition of borophosphate bioactive glasses (BPBGs) to replace growth factors, can be used with multiple cell types to bio print the proposed …

Directed Energy Deposition Processing-Performance Relationship Of Af9628, Mianqing Yang

Masters Theses

"AF9628 low alloy steel is a novel steel known for its low cost, high hardness, and outstanding tensile performance. However, the processing methods of AF9628 have been less studied in the additive manufacturing field. As the balance of hardness and tensile results is closely related to the cooling process during manufacturing process window and its relationship to resultant tensile properties is explored. By using the DED method, specimens of this steel are successfully fabricated, and tensile test results are obtained. The AF9628 steel can be manufactured for tailored properties with the DED process by controlling the cooling method. This work …

Hysplit In Simulating The Atmospheric Dispersion Of Hazardous Aerosols: A Case Study In St. Louis, Missouri, Ahmet Tolga Odabasi

Masters Theses

"Atmospheric dispersion and transmission play an important role in the behavior and effects of air pollution. Human health can be adversely affected by air pollution in a variety of ways, both immediately and over time. The Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) modeling program, a computer model and software package, tracks the transport trajectories and distributions of air pollution and various pollutants, including radioactive pollutants, in the atmosphere. It also facilitates research on pollution sources. This study simulated the transport of hazardous aerosols in St. Louis region for the years 2020, 2021, and 2022 using the HYSPLIT modeling …

Incarcerated To Educated: The On-Campus Experiences Of College Students Post Incarceration, Taylor Comer

Masters Theses

As reentry rates continue to climb in the United States, more individuals with felony convictions on their criminal records will be looking to obtain post-secondary education to make themselves more marketable in the workforce. The purpose of this narrative study was to examine the experiences of three individuals that pursued higher education after being released from prison. It was determined that the criminality of these individuals had minimal impact on their experiences in higher education, and that there are other components of their identity that have a heavier influence on their likelihood of success. The other components of their identities …

Social Gender Norms And Depression In College Students, Derek Deeney

Masters Theses

The primary purpose of this quantitative study was to determine if there was a relationship between the conformity to social gender norms (masculine and feminine) and depression among male and female college students at a mid-sized, four-year public institution in the Midwest. A secondary purpose was to investigate if there was a difference in depression between males and females, and if a there was a difference in conformity to social gender norms (masculine and feminine) between males and females. Understanding the trends in social norm conformity and depression can lead to changes in how faculty and staff in higher education …

Further Psychometric Examination Of The Late Adolescent Social Support Inventory, Nicole Shaffer

Masters Theses

The current study set out to provide validity evidence for the Late Adolescent Social Support Inventory (LASSI), a scale designed to measure the perception of the availability of social support. Participants were recruited from undergraduate psychology courses at Eastern Illinois University. There were 69 participants who completed the LASSI, an alternative measure of social support (the Interpersonal Support Evaluation List, shortened version; ISEL – 12), measures of depression, anxiety and stress (the subscales of the Depression Anxiety Stress Scale, short version; DASS – 21), and a measure of satisfaction with life (the Satisfaction with Life Scale; SWLS). All scales demonstrated …

Investigating Sleep Education Criteria In Illinois Public Schools And Its Alignment With Evidence-Based Practices, Bayleigh T. Pasley

Masters Theses

The purpose of the current study was to examine high school health curricula regarding sleep prevention and intervention practices and whether instructional content aligned with best practice for this age group. Specifically, the Primary Investigator and her thesis chair developed the Sleep Education and Preventative Practices Checklist/Questionnaire (SEPPC and SEPPQ) as tools to evaluate the sleep content covered in different public high schools across Illinois. The SEPPC and SEPPQ were identical in that they contained 17 different items which looked at different sleep topics reviewed by current literature. The SEPPC/Q contained two main topics: adolescent sleep knowledge (11 topics/items) and …

The Effect Of School Uniforms On High School Students’ Feelings About School And Their Communities, Maggie Vavrik

Masters Theses

What you wear can feel like a defining aspect of who you are as a person. For high schoolers especially, how they look on the outside, can affect other factors such as their sense of belonging and safety both within their school and their community. In this study, I conducted focus groups at a high school which requires uniforms to be worn. Through the focus groups, I was able to learn how wearing a uniform impacted them on a daily basis. During the study I was also able to observe at the school for a day and note the trends …

Population Demographics Of Channel Catfish In The Lower Wabash River, Valerie J. Thompson

Masters Theses

Inland fisheries are experiencing increasing demands due to anthropogenic stressors, especially within large river systems that support both recreational and commercial fisheries. Riverine species are sensitive to habitat degradation, species introductions, and exploitation, so continued monitoring and management of these communities are vital to maintain abundance and diversity within these systems. The North American catfish family, Ictaluridae, supports both recreational and commercial fisheries throughout the United States. Channel Catfish Ictalurus punctatus are heavily studied and managed compared to other sport catfishes in this family because of their economic and ecological significance. One important Channel Catfish fishery exists in the lower …

Replication Of Construct Validity Of The Behavior Assessment System For Children-Third Edition Teacher Rating Scales (Basc-3 Trs) And The Adjustment Scales For Children And Adolescents (Asca), Joel Katla

Masters Theses

Behavior rating scales, such as the Behavior Assessment Scale for Children-Third Edition Teacher Rating Scale Child form and the Adjustment Scales for Children and Adolescents (ASCA) are common tools to help school psychologists identify and assess problematic behaviors and youth psychopathology. However, the original BASC, the BASC-2, and the BASC-3 have little replication research available. The ASCA, while now having potentially outdated norms, has had replication research conducted and is considered empirically sound. Burback (2020) empirically compared the BASC-3 TRS-C with the ASCA to assess construct validity (convergent, discriminant, divergent) since there were no published studies replicating research presented in …

Student Perceptions Of Teacher Praise: Considering Diversity, Kealie S. Jenkins

Masters Theses

The purpose of this study was to expand the praise preference literature by considering student diversity. Specifically, students (grades 7-12) acceptability and preferences for praise and reprimand were assessed while considering the following: (a) White/ Non-White, (b) Rural/ Suburban, (c) Special Education/ General Education, and (d) Low SES/ Middle-High SES. Students’ acceptability and preferences for praise and reprimand were collected through the Adolescent Praise and Reprimand Preference Survey (APRPS). A total of 1125 students completed the APRPS. Regardless of diverse group comparisons (except Low SES and Middle/High SES) the top three preferences across (schoolwork and appropriate behavior) all groups included …

Acute And Chronic Impacts Of A Biofilm, Activated Sludge, And Ultraviolet Radiation Treatment On The Fathead Minnow, Pimephales Promelas, Julia Fitch

Masters Theses

Wastewater treatment plants (WWTPs) are a point source of pollution that have potentially damaging effects on downstream fish populations, including reduced growth and survival and reproductive complications. To examine these possible effects, fathead minnows were exposed to effluent of three wastewater treatment processes at the Charleston Wastewater Treatment Plant located in Charleston, Illinois. These three treatments included two secondary treatments, a biofilm treatment and an activated sludge treatment, and one tertiary U.V. treatment. Two trials took place during this project: an acute, two-week exposure trial, and a chronic 119 day exposure trial. Upon completion of each trial, fish were assessed …

The Role Of Study Abroad Directors In The Internationalization Of Higher Education, Alexandra Tserenova

Masters Theses

This study looks at the preparation and job description for those serving as directors of study abroad on the college campus. For this study three professionals who work in director positions were interviewed as well as their job descriptions were analyzed to determine what the expectations are for those in these positions. Study abroad professionals engage with students, faculty, external agencies, and other educational institutions worldwide. They are required to collaborate with many different constituents in the areas of program development, recruitment, risk management, program implementation, as well as pre- and post-departure orientations.

Emailed Support For Implementation Fidelity: The Effects Of Email Prompts On Teacher Use Of Bsp, Kathryn Krouse

Masters Theses

This study sought to expand the literature on the effects of emailed implementation support on teachers’ use of behavior specific praise. The effects of the intervention on select student outcomes were also observed. Participants were four early elementary school teachers that sought support for implementing research-based classroom management practices. A concurrent A-B-C-D multiple-probe design was utilized to observe changes in the teachers’ behavior specific praise and correction frequencies and their students’ on-task and disruptive behaviors when didactic training, email prompting, and email performance feedback were introduced in separate phases. The results indicated that three of the four participants increased their …

Exploring A Medicinal Strain Of White-Rot Fungus For Biofuel Applications, Kortney L. Lucius

Masters Theses

The major limitation to producing biofuels from lignocellulosic biomass, such as miscanthus straw, is the difficulty in accessing fermentable carbohydrates encased in lignin. Traditional methods for separating lignin are economically and environmentally costly. Biological pretreatment using white-rot fungi, such as Trametes versicolor, has been demonstrated to potentially reduce the need for harsh chemical and physical pretreatment methods. Despite these efforts, the process of converting lignocellulose to ethanol remains financially challenging. To explore a potential co-product for the process, this study evaluated the efficacy of T. versicolor strain CM-101, known for producing the valuable medicinal macromolecule polysaccharide-K (PSK), as a …

Influence Of Attack Performance On The Ovc Volleyball Regular Seasons 2022 & 2023, Ignacio Valdemoros

Masters Theses

Understanding the outcome of volleyball games is necessary for coaches before, after, and during a season. There are several ways to gain this understanding, but statistical analysis is fundamental to see the minimum patterns of behavior that influence wins and losses in Volleyball. Furthermore, this analysis helps identify the optimal approach to achieving a goal and determining the most effective alternative to success. Scoring points in Volleyball involves three key skills: serving, blocking, and attacking. Among these skills, attacking plays the most relevant role in determining the outcome of a match. The position on the court (e.g. Outside Hitter, Middle …

Vote Like A Man, Act Like A Woman: An Exploratory Analysis Of The Political Behavior Of Contemporary American Conservative Women, Alex Hawkins

Masters Theses

This article seeks to establish a baseline for the political behavior and participation levels of Republican women by measuring six political activities. Using CCES 2020 self-selected survey data, the six political activities measured were: made a political donation, attended a march or protest, attended a political meeting, worked on a campaign, contacted a public official, displayed political signage. The political behavior and participation levels of Republican women were compared to the levels of Republican men and non-Republican women. This comparison was established to provide further insight into the political behaviors of Republican women, including the relationship between gender and partisanship …

Synthesis Of A Basket-Shaped Host Molecule Based On P-Tert-Butylcalix[4]Arene Featuring Pyridinyl Groups For Volatile Guest Molecule, Boluwatife S. Ajewole

Masters Theses

Supramolecular and Molecular chemistry offer an expanding array of applications for the development of smart devices, with calixarene-based molecular baskets playing a pivotal role in host-guest chemistry. A key concept in this field is the design of "smart" molecules with gate-like features, which can selectively transport chemical or biochemical species that are volatile, reactive, or sensitive to typical solution environments. These molecular hosts are engineered with predefined groups that respond to external stimuli, such as changes in concentration, temperature, or pH.

Molecular baskets are synthetic host molecules designed to capture guest molecules selectively through adjustable gates. In our study, we …

Evaluating The Influence Of Operator Practices On Hydraulic Shovel Productivity And Energy Consumption Using Telemetry Data, Noah Adekunle Aluko

Masters Theses

"Hydraulic shovels are increasingly being adopted in the mining industry, which is known for its significant energy consumption and carbon emissions. Technological improvements in hydraulic shovels aim at bolstering energy efficiency and productivity because of the drive to curb energy consumption and enhance energy efficiency. However, one aspect that is often overlooked is the vital role of operators. Although the influence of operators’ practices on excavators’ energy efficiency has been acknowledged in past studies, there is a paucity of quantitative research assessing this influence in the context of hydraulic shovels.

The main objectives of this study are to 1) develop …

The Deep Bsde Method, Daniel Kovach

Masters Theses

"The curse of dimensionality is the non-linear growth in computing time as the dimension of a problem increases. Using the Deep Backwards Stochastic Differential Equation (Deep BSDE) method developed in [HJE18], I approximate the solution at an initial time to a one-dimensional diffusion equation. Although we only approximate a one-dimensional equation, this method extends well to higher dimensions because it overcomes the curse of dimensionality by evaluating the given partial differential equation along "random characteristics''. In addition to the implementation, I also present most of the mathematical theory needed to understand this method"-- Abstract, p. iii

Enabling Smart Healthcare Applications Through Visible Light Communication Networks, Jack Manhardt

Masters Theses

"Future smart healthcare operations are envisioned to require the support of high-performance wireless networks. Researchers are presented with a problem, however, as the hospital environment brings unique challenges to the application of traditional radio-frequency wireless communication networks due to health concerns and electromagnetic compatibility standards. To meet these challenges and support the advancement of high-quality healthcare, we propose the use of an alternative wireless technology in visible light communication (VLC). Contributing to the growing interest in VLC amongst researchers, we construct both a VLC network simulation testbed as well as real-world testbed to serve as a platform for the development …

Radiofrequency Interference Detection Using Lstmand Statistical Analysis Discriminator, Luke Smith

Masters Theses

"Wireless devices are becoming increasingly pervasive across all aspects of society. Examples of such devices include radios, routers, mobile phones, tablets, and more. As the number of radio frequency (RF) devices continues to rise, so does the amount of interference and noise increase. This is why an efficient approach to interference detection is explored. Most research within this area has been done strictly within the frequency domain as viewing a signal within this domain provides many insights into what makes the signal. This has, however, led to the time domain being underutilized for this area of research.

To explore the …

Laboratory Scale Experimental Analysis Of The Effect Of Surfactants On Acid Mist Suppression During Copper Electrowinning, Thurman Kollie Elgin

Masters Theses

"The reduction in acid mist generation is an industrial occupational objective in the electrowinning industry of base metals. The technology of electrowinning as an extractive metallurgical technique of metals proficiently contributed to the recovery of pure base metals. During the process of electrowinning, oxygen bubbles are generated on the anode of the electrowinning cell because of the over potential in the cell due to high voltage. The bubbles formed tend to contain sulfuric acid of the electrolyte in the form of liquid-gas ascending particles of the solution. As these bubbles ascend to the surface of the solution, they burst at …