Digital Commons Network^™

Predicting Radiated Emissions From A Cable Harness Through Component Level Tests, Fuwei Ma

Masters Theses

“In this work, a procedure is developed to predict the radiated emissions from a cable harness using component-level tests. Direct measurement on the engine control unit is utilized to accurately characterize the equivalent common mode source voltages and impedance associated with the device. The cable harness geometry is reduced using the equivalent cable bundle approach by lumping wires according to the source and load impedance compared with characteristic impedance of the harness, which dramatically reduces the measurement effort and allows practical 3D full-wave simulation of the radiated emissions. Radiated emissions are predicted from an engine control unit (ECU) and an …

Continuous And Discrete Models For Optimal Harvesting In Fisheries, Nagham Abbas Al Qubbanchee

Masters Theses

"This work focuses on the logistic growth model, where the Gordon-Schaefer model is considered in continuous time. We view the Gordon-Schaefer model as a bioeconomic equation involved in the fishing business, considering biological rates, carrying capacity, and total marginal costs and revenues. In [25], the authors illustrate the analytical solution of the Schaefer model using the integration by parts method and two theorems. The theorems have many assumptions with many different strategies. Due to the nature of the problem, the optimal control system involves many equations and functions, such as the second root of the equation. We concentrate on Theorem …

Numerical Investigations Of 2-D Magnetic Nozzles On Pulsed Plasma Plumes, Joshua Daniel Burch

Masters Theses

"This research presents studies of a novel type of magnetic nozzle that allows for three-dimensional (3-D) steering of a plasma plume. Numerical simulations were performed using Tech-X's USim® software to quantify the nozzle's capabilities. A2-D planar magnetic nozzle was applied to plumes of a nominal pulsed inductive plasma (PIP) source with discharge parameters similar to those of Missouri S&T's Missouri Plasmoid Experiment (MPX). Argon and xenon plumes were considered. Simulations were verified and validated through a mesh convergence study as well as comparison with available experimental data. Periodicity was achieved over the simulation run time and phase angle samples were …

Effect Of In-Situ Formed Nano-Calcite Particles On Hydration And Properties Of Cement-Based Materials, Bowen Tan

Masters Theses

The in-situ preparation of nano-calcite via bubbling method and the effects of the nano-calcite on the hydration process and properties of the cement-based materials are investigated in this research. The nano-calcite is synthesized under different conditions and added into Portland cement to prepare test samples. The bubbling method is then introduced in upcycling the municipal solid waste incineration (MSWI) ashes, and the effects of the upcycled MSWI ashes on the hydration of Portland cement is investigated. Experimental results illustrate that the COâ‚‚ bubbling method can produce nanometer-to-sub- micron-sized calcite particles, and the synthesis rate and the morphology of the nano-calcite …

Developing A Vr Training Model For Improving Transportation Safety Protocols For Rural Areas, Emmanuel Olumide Adeosun

Masters Theses

"This research evaluated the effectiveness of using simulated virtual reality driving environments to improve transportation safety in rural areas. The transportation accident fatality rate is more than double the national average in rural areas and highlights an important opportunity to address these challenges through improved safety protocols and investments. A review of the literature revealed high frequency scenarios that contributed the most to fatality or injury accidents. Virtual reality driving simulations were created based on these high frequency events using a specified rural roadway identified with the assistance of the Missouri Department of Transportation. Scenarios considered weather-related conditions, such as …

Analysis Of Electromagnetic Interference Problems Causedbyhigh-Speed Multiplayer Boards With Split Referenceplane, Xin Fang

Masters Theses

"Digital/Analog ground partitioning has been used to isolate noisy digital and power current from sensitive analog currents in high-speed multiplayer printed circuit boards. The through-hole signal via enables convenient routing and component placement on the PCB and is used for signal interconnections when the signal traces are changing the layers. This design, however, breaks the current return path for signal traces that cross the two separated grounds, which causes undesired effects such as signal distortion and radiated emission.

Electromagnetic mechanism associated with them needs to be understood to control and suppress these undesired effects. In this paper, we have investigated …

Using Lake Sediment Chemistry In The Exploration For Nickel Laterite Deposits In Tropical Regions, Gabriela Yvonne Ramirez

Masters Theses

"Developing reliable geochemical indicators to guide the search for ore deposits is a long-standing goal. This particularly applies to tropical regions that are often heavily vegetated which hampers boots-on-the ground exploration efforts. Here we present the preliminary results of a study that investigates the usefulness of lake sediment chemistry in the exploration for nickel laterite ore deposits in tropical regions using Lake Izabal, Guatemala, as a case study. Lake Izabal’s catchment area contains Ni laterite deposits along its northern shore, whereas no Ni-laterite discoveries have been made in the south except for a Ni mine in the southern region that …

Integrating Remote Sensing And Model-Based Datasets In A Machine Learning Model To Map Global Subsidence Associated With Groundwater Withdrawal, Md Fahim Hasan

Masters Theses

"Quantifying groundwater storage loss is becoming increasingly essential globally due limited availability of this major hydrologic component and its long recharge time. Groundwater overdraft gives rises to multiple adverse impacts including land subsidence and permanent groundwater storage loss. In absence of spatially dense monitoring network, publicly available in-situ data, and uniform monitoring strategies, it is challenging to assess the sustained losses from overexploitation of this resource. Remote sensing based techniques have the capacity to fill this gap to increase our groundwater monitoring capacities. Exploring the interrelation between groundwater pumping and land subsidence using remote sensing datasets can be a very …

Lithofacies Characterization Of Marine Shelf Shale And Implicaitons On Depositional Conditions And Processes On The Continental Shelf — A Case Study Of The Upper-Cretaceous Tuscaloosa Marine Shale In Louisiana And Mississippi, U.S.A., Efren Mendez Jr

Masters Theses

"The Upper Cretaceous Tuscaloosa Marine Shale (TMS) is an unconventional shale reservoir deposited on the continental shelf of the northern Gulf of Mexico Basin. Previous studies have focused on sequence stratigraphy, thermal modeling, and well-log correlations. However, a limited understanding of the stratigraphic heterogeneity of the TMS is yet to be studied. This study aims to characterize the stratigraphic heterogeneity of the TMS using core, petrographic, and well-log analyses to better understand the depositional conditions and processes that occur on the continental shelf. The TMS has been classified into four lithofacies of very fine sands – coarse silts (LF1), medium-fine …

Assessing Phenotypic Response Of Plants Irrigated With Municipal Solid Waste Landfill Leachate Using Computer Visualization, Rahel Pommerenke

Masters Theses

"Most solid waste collected in the US is disposed of in sanitary landfills, which have a lingering legacy of unintended negative impacts on the environment. Landfill design and operation are expensive, prone to multiple failure modes, and often do not address human and ecological risks presented by contaminants of emerging concern. A notable and common failure mechanism is leachate production. Moisture in the waste mixes with infiltrating water to form wastewater that must be collected and treated prior to discharge. Recycling leachate at landfills by recirculating it onto vegetated landfill covers relies on the evapotranspiration potential of plants to reduce …

Smart Living With Artificial Intelligence -- Potential Impact Of Artificial Intelligence On Mental Well-Being, Weiyu Wang

Masters Theses

"Artificial Intelligence (AI) will result in job replacement and job elimination. Some AI technologies, such as self-driving vehicles, have the potential to disrupt existing industries. Self-driving trucks may replace the 3.5 million truck drivers in the US. Scholars at Oxford University estimated that no less than 47% of American jobs and 54% of those in Europe are at a high risk of being taken over by machines. Routine, repetitive, and predictable jobs are expected to be automated (Siau, 2018). Although new jobs will be created, the unemployment rate may go up in the short term and the emergence of a …

Comprehensive Evaluation Of Novel Medium-Temperature And High-Temperature Resistant Re-Crosslinkable Preformed Particle Gels For Conformance Control, Zhanmiao Zhai

Masters Theses

"Gel treatment has been widely used to control excessive water production and improve oil recovery in mature oilfields. In comparison to traditional preformed particle gel (PPG), re-cross linkable preformed particle gel (RPPG) has a significant advantage in treating abnormal features such as open fractures, fracture-like channels, and void space conduits (VSC). This research provides a comprehensive evaluation of two novel RPPG products developed in our lab: medium-temperature resistant RPPG (MT-RPPG) for a Middle East reservoir and a high-temperature resistant RPPG (HT-RPPG) for North Sea reservoirs (130 ^oC).

We assessed the effect of the monomer types and concentration, pH, salinity, …

"The Women's Hell": Distinctions Between Forms Of Sexual Violence At The Ravensbrück Concentration Camp, The Liberalization Of Sexuality In The Weimar Republic, And The Exploitation Of Sexuality In The Third Reich, Ashley Ruth Lamoureux

Masters Theses

The Ravensbrück concentration camp located in northern Germany acted as the only Nazi concentration camp designated exclusively for women following the closure of the Lichtenburg camp. Beginning in 1939, women held in other camps, ghettos, prisons, and sanatoriums across the Reich were transported to Ravensbrück, “the women’s hell”. Until recently, Holocaust scholarship has largely overlooked the history of Ravensbrück as well as the complicated demographics of prisoners in the camp. A majority of the female prisoners at Ravensbrück were asocials or political and religious dissidents. The distinction of asocials as a separate prisoner categorization was not invented by the Nazi …

Students’ Reflection Of Cross-Cultural Experiences: A Study Abroad Narrative, Alexandra Dudley

Masters Theses

This study sought to explore the cross-cultural experiences of students who had studied abroad during their undergraduate college years. Previous research has shown the importance and impact of study abroad and cultural experiences on student development. A qualitative approach, specifically a narrative method, was utilized to best understand students’ stories and how they made meaning of their study abroad experiences. Four participants were interviewed one-on-one, and their stories or narratives are provided here. This study revealed that students studying abroad with adequate support will experience an array of cross-cultural influences that leave lasting impacts on their personal and professional lives.

From Soup To Nuts - The Efficiency Of Non-Profits: Evidence From U.S. Food Banks, Mary A. Mattingly

Masters Theses

Nonprofits are a growing part of America’s economy and play an import role in fulfilling the needs of society in addition to private firms and government agencies. Economists haven’t researched nonprofits as much as other firms in the past, but this is starting to change. This project looks at the efficiency of 20 food banks in the United States using Data Envelopment Analysis. The results show that American Food Banks appear to be using their funds efficiently, but others could learn to use their inputs and outputs in a more efficient manner. As more data becomes available, this area of …

Hazing Prevention: The Advisor Perspective, Gabby Hiller

Masters Theses

There has been extensive research conducted on students’ perceptions and understanding of hazing in fraternities and sororities (Allen & Madden, 2008; Allen & Madden, 2012; Alexander, 2018; Cokley et al., 2020). Despite preventative efforts and existing research, hazing continues to occur and continues to threaten the future of fraternity and sorority life. There is little to no research on chapter advisors’ understanding of hazing and hazing prevention in their roles. The purpose of this qualitative study is to examine the role that fraternity advisors play in the education and prevention of hazing, through interview with the advisors. The study looks …

Undocumented Students’ Barriers To Completing Higher Education, Yesenia Muruato

Masters Theses

This study sought to examine the circumstances that influence DACA recipients in the United States to withdraw from their undergraduate institutions. This qualitative study on undocumented/DACA students who have left higher education prior to degree completion. It identifies the impact of immigration status on enrollment decisions, reasons for leaving higher education, obstacles students faced, and what programs or services might have successfully intervened and given them the opportunity to continue enrollment.

Deciphering The Role Of Mitochondrial Physiology And Thermal Acclimation In Shaping Whole Organismal Performance Of An Invasive Forest Pest, Essa Alrashdi

Masters Theses

Environmental factors such as temperature are substantial determinants of the spongy moth, L. dispar, distribution, reproduction, and growth. Accumulating energy reserves at the larval stage is particularly important to L. dispar, since the larvae metamorphose into a fully-grown, non-feeding adult. As non-feeding adults, the energy balance of the pupae must be adequate, to ensure enough energy reserves for adult dispersal, egg maturation and overall persistence of the species in the region. At this stage, environmental temperature also determines daily metabolic demands, and the overall cost of sustaining ecologically relevant activities. Various hypotheses describing a mismatched growth and metabolic …

The Experiences Of Professionals Of Color At A Predominantly White Institution, Brandy Matthews

Masters Theses

This qualitative study looks at the experiences professionals of color face in a Predominately White institution. More specifically, this study showed that professionals of color still face many challenges due to the barriers they face on, and off-campus compared to their White counterparts. This study utilized semi-structured interviews to help explore professionals of color experiences at a rural mid-sized university in the Midwest.

Does Social Support Mediate The Relationship Between Locus Of Control And Activity Levels?, Leah L. Oglesby

Masters Theses

The aim of the present study is to examine the mediating effect of social support on the relationship between internal locus of control (LOC) and engagement in activity, treating general physical activity and deliberate exercise as specific and separate domains. Two models will be investigated: a domain-general model and an exercise-specific model, the former examining the mediating effect of general social support on the relationship between health locus of control and general physical activity and the latter examining the mediating effect of exercise-specific social support on the relationship between exercise LOC and deliberate exercise engagement. Survey responses from 279 college-aged …

A Case Study On Illinois Regional Public Universities And The 2015-2017 Budget Impasse, Colin L. Roberts

Masters Theses

This study explores the lived experiences of administrators who led their institutions through the two-year Illinois budget impasse. This study also reviewed archival evidence of measures taken by public regional universities in Illinois to mitigate the loss of state appropriations. Previous research has shown that the business model of public higher education in the United States is undergoing disruption. Changing demographics, enrollment concerns, and rising tuition were just some of these issues pressuring public institutions of higher education. The temporary loss of state appropriations exacerbated these issues and had long-lasting effects even after the Illinois budget impasse ended. In order …

"Comic"Ally Calling For Cultural Competency: Using Graphic Narratives To Teach Social Justice In The Writing Classroom, Travis Moody

Masters Theses

No abstract provided.

More Than Just Sticks And Stones: Effects Of Interpersonal Interactions On Liminality And The Negotiation Of Identity, Conlon Muhr

Masters Theses

The following study contains the detailed findings of my lived experiences studied in an autoethnographic method with a focus on the effects of interpersonal communication on identity negotiation during liminality. This study is conducted to expand upon the large and dense web of communication studies. During the use of the autoethnographic process, I provide in-depth insight into my lived experiences during liminality. The main goal of the study is to explore how interpersonal interaction affects liminality and the formation of identity. Liminality support, rejection, complication, and acceptance are the emergent themes found by combining liminality with interpersonal communication.

The White Ally Experience: A Look Into The Impacts Of Being A White Ally, Kristen Maclin

Masters Theses

If an ally knew what they would experience, would they be more willing to stand up? Racism, institutional racism, racial bias, discrimination, and microaggressions have existed in our country since its inception. One way to work to overcome these is by growing allyship and having allies who are willing to speak up and stand beside marginalized groups. This research study addressed what allyship means, the byproducts of racist structures that allies have encountered, ally burnout, and ways to overcome burnout. These were researched through surveys from BIPOCs, named allies, and my school colleague populations. My research found that many White …

Assessing Early Educators’ Knowledge Of Behavior Management, Early Intervention, And Developmental Delay, Jillian Mcmahan

Masters Theses

The current study examined pre-service teachers’ knowledge of behavior management strategies, early intervention, and developmental delay. Data were collected from 107 participants. Thirty-two were pre-service early education teachers currently enrolled in educator prep courses and 75 were in-service early education teachers. Participants completed an online questionnaire that included the following topics: problem behaviors, evidence-based practices, preschool expulsion, and educator prep courses. In-service teachers were better than pre-service teachers at identifying the top three commonly observed preschool student problem behaviors. For evidence-based practices, a majority of pre-service and in-service participants indicated that they would probably or definitely (4 and 5 ratings) …

Pd-Based Photocatalysts For Heck C-C Cross-Coupling Reactions, Suha Ali Alshehri

Masters Theses

Heck C-C cross-coupling reaction has been widely employed in synthetic organic chemistry because of its high efficiency and simplicity, however the conventional Heck C-C cross-coupling reaction conditions involve the use of an expensive toxicant phosphine-ligated palladium complexes, and high temperature. To address these drawbacks, a highly efficient, homogeneous photocatalyst based on BODIPY for the Heck C-C cross-coupling reactions of aryl iodide and methyl acrylate in DMF solvent under inert conditions has been developed. The 4-Py-BDP-Pd, 3-Py-BDP-Pd and, 2-Py-BOD-Pd catalysts were synthesized and purified using column chromatography. The optical properties of products and intermediates were studied by UV/vis absorption and fluorescence …

The League Of Nations High Commission For Refugees From Germany After 1935, Sergio Vlahovich

Masters Theses

The League of Nations’ effectiveness as a bureaucratic body has been hotly contested. Almost since its founding, critics of the League viewed its humanitarian and peacekeeping missions as failures. This thesis reevaluates these criticisms by studying the League’s work on behalf of refugees from Germany from the end of 1935 up through the Second World War. The thesis focuses on the activities of the League after James G. McDonald, High Commissioner for Refugees Coming from Germany, resigned in December of 1935 and during the time the Intergovernmental Committee for Refugees (ICR) began its work on the issue of refugees fleeing …

Covid Fears And Social Anxiety In College Students, Clayton Crozier

Masters Theses

The COVID-19 pandemic has been associated with numerous negative mental health outcomes such as social anxiety, and lead to a great deal of uncertainty. Intolerance of Uncertainty is a relatively new concept in the psychology literature and has begun to be studied in the context of anxiety. Literature has found a positive correlation between Intolerance of Uncertainty and several types of social anxiety. With these findings, researchers have begun to examine the COVID-19 pandemic to see how Intolerance of Uncertainty affects people’s mental health during the pandemic. Intolerance of Uncertainty may be a mediator between social anxiety and the fears …

Applying Intensity-Based Methods To Disentangle Microwave Spectra Of Complex Mixtures: Analysis Of Weakly Bound Clusters Of 1,1-Difluoroethylene/Co2, Hannah Fino

Masters Theses

Microwave spectroscopy is used to study the solvent-solute interactions between molecules of CO₂ and fluoroethylenes by analyzing the formation of weakly-bound clusters in a gaseous mixture. One of the challenges to analyzing microwave spectra obtained for these weakly-bound species is that spectra for individual clusters are mixed together in an original complex spectrum. This prompts development of automated techniques that could separate complex data into subsets of related data to be more easily analyzed.

The techniques developed in this work are founded on intensity-based analyses, following the work of Dr. Robert Field on Extended Cross Correlation (XCC). The XCC …

Twenty-Nine Delusions Concerning Love, Jackie Donaldson

Masters Theses

Twenty-Nine Delusions Concerning Love is the story of my relationship. I narrate the relationship's unfolding through the contexts of philosophy and cultural theory, and through artifacts of my own work rendered since the relationship's inception in December of 2020. The purpose of this project was to identify a gap in the autotheory genre, and to fill that gap with my own meaningful contribution -- a book which hybridizes life writing with prose and poetry. This piece is both a narration of my own experience, and an investigation into hookup culture and the way technology has redefined the modern romantic relationship. …