Digital Commons Network^™

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 …

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 …

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 …

Teacher Hiring And Selection Processes In Iowa Schools, Michael C. Fisher

Dissertations and Theses @ UNI

Relatively little is known regarding how Iowa public school principals conduct hiring and selection of their teachers. While there is national research that has a focus on these areas, this research is generally conducted in large urban settings outside of the context of smaller rural schools. It is widely accepted and empirically backed that classroom teachers have the biggest impact on student achievement (Boyd et al., 2007; Cranston, 2012; DeStefano, 2002; Gordon et al., 2006; Ingebrand, 2012). Yet there is a gap in the research identifying why and how Iowa public school principals hire and select while assessing this most …

Master's Recital: Kyle Punt, Kyle Punt

Dissertations and Theses @ UNI

The purpose of this recital is to partially fulfill the requirements for the Master of Music degree in Jazz Pedagogy, and to display musical proficiency on piano, bass guitar, and drum set. Kyle Punt scheduled his graduate recital for March 22, 2022 at 7:30 PM.

Changes In Reproductive Behavior And Birth Patterns During The Covid-19 Pandemic In Sakartvelo (The Republic Georgia) [რეპროდუქციული ქცევასა და შობადობის ცვლილებები კოვიდ-19 პანდემიის დროს საქართველოში], Nino Mateshvili

Dissertations and Theses @ UNI

Because of the increased frequency and extent of large-scale disasters, including health events, there is a need to better understand the impacts of these disasters on key demographic processes. In particular, in the European countries, including the Republic of Georgia (Sakartvelo), which already face demographic problems, such as aging population and decreasing birth rates, researchers and policymakers are concerned with the impact of the COVID-19 pandemic on demographic indicators and processes, such as birth rates and reproductive behavior. That is why it is very timely to collect and analyze initial evidence establishing the impacts of the COVID-19 pandemic as a …

Doing Corpus Pragmatics: Variations In Speech Acts Performed In Conversations Occurring Naturally In Academic Contexts, Jacob Philip Rigal

Dissertations and Theses @ UNI

No abstract provided.

The Path From Paramilitary To Politics: Gerry Adams, Sinn Féin, And The Good Friday Agreement: 1986-1998, Brenann Hamilton

Dissertations and Theses @ UNI

Although the Troubles often have been written about by historians through a nationalistic or cultural context, pitting the Irish Catholic Nationalists against the Protestant British loyalists, much of the action took place within the political sphere, as the Nationalists’ and Unionists’ representatives fought for concessions and control. Rather than focusing on the religious differences or the ethnographic backgrounds of the people living in Northern Ireland, this thesis examines through a political context how the leaders of Sinn Féin shaped popular opinion and gained support through nonviolent means. While the national identity and cultural differences between the Nationalists and Unionists inform …

Quantifying Genomic Diversity And Growth In Iowa Bluegill, Jeremy Raymond Abels

Dissertations and Theses @ UNI

Bluegill (Lepomis macrochirus) is one of the most fished species in Iowa. However, after an initial stocking event, lakes rarely receive additional stockings owing to a high rate of natural reproduction. For this reason, the genetic diversity of Bluegill populations remains understudied in the context of fisheries and natural resource management. Additionally, the extent to which genetics influences the growth rate of Bluegill on a population level has not yet been extensively examined. The goal of this study was to understand the diversity of Iowa’s Bluegill population and to determine if there is a genetic association with growth …

Gender Performance And Political Identity At The January 6 Capitol Insurrection, Emma Elise Newton

Dissertations and Theses @ UNI

The January 6 Capitol insurrection was heavily documented with recorded videos and photos, across legacy and social media. Despite engaging in criminal acts, many participants recorded themselves participating in the attack and posted their videos to Parler, a right-wing alternative to Facebook and Twitter that gained traction among the far-right, QAnon conspiracy theorists, and white supremacy groups. These social media videos detail an interesting rhetorical dynamic at play, one that is not so recognizable in legacy media: performances of sex/gender. Analyzing videos uploaded to a conservative social media landscape provides a lens into performances of gender as it intersects with …

Effects Of Perceived Reach On Ratings Of Media Bias, Quality, And Agreement, Matthew Sedlacek

Dissertations and Theses @ UNI

The hostile media effect refers to individuals’ tendencies to perceive seemingly neutral news coverage as biased against their stance (Vallone et al., 1985). Research has shown this effect in partisan politics, with liberals and conservatives perceiving bias in information presented from the opposing side. The current study examined the effects of liberal or conservative and small or large audience news source manipulations on liberals’ and conservatives’ perceptions of media bias and the relationship between partisan identity and perceptions of bias. Three hundred and sixty participants read a news article presented with either a Fox News, CNN, PatriotNewsDaily, or The Progressive …

Educational Experiences Of First Generation Black African Students With And Without Dis/Abilities, Shehreen Iqtadar

Dissertations and Theses @ UNI

Several studies have focused on the disproportionate representation of students from historically multiply marginalized communities in special education (Artiles, 2011, 2013; Artiles et al., 2005; Brayboy et al., 2007; Cavendish et al., 2018; Cooc & Kiru, 2018; Dunn, 1968; Hosp & Reschly, 2004; O’Connor & Fernandez, 2006; Voulgarides et al., 2017). Only recently, researchers have begun to explore the connections between immigrant and refugee students and special education (Migliarini, 2017; Song, 2018; Qing, 2018). Missing in this literature are the critical accounts of students and (a) their perspectives about the nature of dis/ability and their placement within special education and …

Training For Challenging Behaviors In The School Setting, Kenzie Heusinkvelt

Dissertations and Theses @ UNI

School personnel are asked to plan for, implement, and evaluate Behavior Intervention Plans (BIPs) in the school setting; however, not all school personnel have been properly trained to do so. There is limited research to date that demonstrates how different school personnel are trained in planning, implementing, and evaluating BIPs. The current study involves school personnel which include school psychologists, school social workers, special education consultants, and special education teachers. These school personnel were asked to indicate how adequate they believed their educational training was in providing a good understanding of various behavior topics and how well their educational training …

Lexile Levels And Their Value To Public School Teachers, Kristin Schumacher

Dissertations and Theses @ UNI

This thesis examines how teachers perceive Lexile level and its value, and whether or not their beliefs inform their practice. To address questions regarding teachers’ beliefs about Lexile level, I designed and implemented an online survey for public school teachers. My research shows that teachers have a favorable view of Lexile level, that they believe both students and parents should be informed of students’ Lexile level, that books should be labeled with Lexile level, and that asking students to read within their Lexile level range is a good practice. This survey research reveals the need to further interrogate whether or …

Frank Capra's America: The Fall Of Political Ambiguity, 1930-1950, Lydia Lennice Pakala

Dissertations and Theses @ UNI

As the United States sank lower into an economic depression, Hollywood sought to turn bread lines into lines for the box office. While other entertainment outlets faltered, film, with its low cost tickets and ability to help patrons escape, remained prominent. Hollywood started to produce films with profit in mind and in the thick of this environment was Frank Capra, a man destined to become one of the most popular film directors of the 1930s and 1940s. Capra made a conscious effort to choose contemporary stories and as a result they are a glimpse not only into the history of …

The New Independents: A Historical Analysis Of Webcomics And Webtoon, Leonal A. Sepúlveda S.

Dissertations and Theses @ UNI

Webcomics have now existed as a form of graphic literature for slightly over thirty years, evolving along with computer technology and in turn reflecting the changes in culture, style and preferences for both independent artists on the Internet and their audiences. The evolution of the webcomic illustrates how the changing trends in technology and profit interests shape stylistic and narrative sensibilities. In turn, the offshoot medium of webtoons, whose history parallels the webcomic directly, illustrates the way the presentday independent webcomic sphere is shaped by the demands of contents platforms that demand its creatives constantly produce content to maintain active …

Media Framing Of Marriage Practices In Afghanistan, Hakima Afzaly

Dissertations and Theses @ UNI

Culturally, in Afghanistan, marriage is given much importance and seen as something that completes life. Through this study, I analyze how marriage practices, such as dowry (Mahr), bride price, and the “virginity ritual,” are described in newspapers and magazines of Afghanistan. In particular, I explore how the popular press, such as 8 Sobh and Khama Press in Afghanistan frame their discussion of marriage practices. The findings from this analysis reveal that newspapers and magazines of Afghanistan frame marriage as an economic issue and a major focus of the articles is on the financial pressure on poor families due to the …

"Land Of The Silver Birch": Environmental Attitudes And Place-Making In A Northern Minnesota Boy Scout Camp, 1960-1975, John Mark Fretham

Dissertations and Theses @ UNI

In 1959, leaders of the Minnesota Valley Council, BSA (headquartered in Mankato, MN) began making plans to create a new Boy Scout camp to replace their recently built camp in Southern Minnesota. The previous fifteen years of the post-World War II era had produced significant shifts in ideas about wilderness, what constituted quality outdoor recreation, growing anxiety about masculinity in the Cold War era, and expansion of the promotion and adoption of a North Woods tourist culture. These changes helped lead the council to begin looking for a site to create a new Boy Scout camp and build Camp Cuyuna …

A Variable Node Optimization Model For Byzantine Fault Tolerant Systems, Ian Robert Fulton

Masters Theses

“Byzantine Fault Tolerance (BFT) has been a major subject of study over the last two decades with increasing societal dependance on secure, correct, and reliable computer systems and online services. This research presents a model for high-level optimization of emerging systems that rely on these BFT algorithms and use a variable numbers of decision nodes. The model highlights the relationship between the security of a system and its efficiency. Two experiments were performed to determine system performance by varying the number of compromised nodes, decision nodes, and total nodes. They examine the probability that a transaction will be compromised based …

State Level Trends In Renewable Energy Procurement Via Solar Installation Versus Green Electricity, Eric Michael Hanson

Masters Theses

“In the past 5 years, consumer options for procuring renewable energy have increased, ranging from rooftop solar installation to utility green pricing to Community Choice Aggregation. These options vary in terms of costs and benefits to the consumer as well as grid integration implications. However, little is known regarding how the presence of a wide range of options for utility-scale renewable procurement affects demand for distributed residential solar installations. In theory, there are three possible relationships, (1) positive correlation, where utility-scale and distributed resources complement each other to increase overall production, (2) negative correlation, where utility-scale and distributed resources are …

Automatic Sparse Esm Scan Using Gaussian Process Regression, Jiangshuai Li

Masters Theses

“Emission source microscopy (ESM) technique can be utilized for localization of electromagnetic interference sources in complex and large systems. In this work a Gaussian process regression (GPR) method is applied in real-time to select sampling points for the sparse ESM imaging using a motorized scanner. The Gaussian process regression is used to estimate the complex amplitude of the scanned field and its uncertainty allowing to select the most relevant areas for scanning. Compared with the randomly selected samples the proposed method allows to reduce the number of samples needed to achieve a certain dynamic range of the image, reducing the …

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 …

Zinc Plating From Alkaline Non-Cyanide Bath, Abdul J. Mohammed

Masters Theses

“Alkaline non-cyanide zinc plating baths are preferred when trying to avoid the toxicity of cyanide baths or corrosivity of acid baths. Without additives, alkaline zincate baths produce powdery non-adherent deposits which have no use in commercial plating. Additives must be added at optimum concentrations to produce adherent, bright and uniform zinc deposits. In this study electrochemical tests were used to determine effects of additives on cathodic polarization, throwing power and morphology of deposits. Current density distribution in a unique bath of 37.5 g L^-1 Zn and 210 g L^-1 NaOH was modelled using COMSOL and validated two plating …

Study Of Contamination Resulting From Historical Mining Within The Old Lead Belt: Mineral Fork Watershed, 2021-2022, Tessa Nicole Mortensen

Masters Theses

“The Old Lead Belt in Missouri has been mined extensively over the past two hundred years, and with historical mining practices often not meeting modern environmental protection standards many areas have significant soil and water contamination as a result. This study focuses on the Mineral Fork River’s watershed in Washington County, Missouri, which includes portions of four separate Superfund sites. In this study, we exam the impact of historical mining on the health of alluvial systems, as evaluated by lead, zinc, and barium (barite) concentrations in the suspended and sediments within tributaries of the Mineral Fork River system. To relate …

Optimization And Modeling Of Esd Protection Devices, Li Shen

Masters Theses

“Transient voltage suppressors (TVS) are used to protect ICs (integrated circuits) against overvoltage, ESD (Electrostatic Discharge), inductive load switching, and even lightning strikes. In this research, a transient behavior model framework for ESD protection devices is used for modelling four different types of TVS (non-snapback, snapback, spark gap like device and varistor). The System-Efficient ESD Design (SEED) methodology is utilized to strengthen the trust in the model framework by efficient simulation of ESD interaction of the off-chip ESD protection devices with the IC ESD protection device and associated measurement data.

Improvements in the TVS transient response, accounting for conductivity modulation, …

Experimental Optimization Of Simulated Ring Rolling Operation For Heavy Rail Industry, Jacob M. Summers

Masters Theses

“Industrially cast AISI 1070 steel wheel pre-forms from Amsted Rail Co. were experimentally hot rolled to simulate the conditions for industrial wheel rolling. Ring rolling of near net shape castings can improve location specific properties by decreasing segregation, closing porosity, and reducing grain size without the use of multiple forging operations in a traditional forging line. As-cast wheel sections were subjected to thermomechanical processing routes using a 2-high rolling mill in a temperature range of 830°C to 1200°C. The goal being to simulate the ring rolling process and optimize benefits of mechanical properties of the as-rolled steel. Charpy V- and …

Validation Of Athlet-Cd With Cora-28 Test, Murat Tuter

Masters Theses

“Following the incidents at Chernobyl and Fukushima, severe accidents at nuclear power plants (NPP) have become a global concern. These accidents generally occur because of a failure in the reactor cooling system (RCS) and result in the melting of the reactor core and fission product release. This event is mostly caused by a LOCA, loss of flow accident, station blackout or loss of heat sink. During a severe accident, generation of hydrogen as a result of steam-zircaloy fuel cladding is a significant safety concern. To better understand and prevent the hydrogen generation issue, safety related experiments and safety related codes …

Several Problems In Nonlinear Schrödinger Equations, Tim Van Hoose

Masters Theses

“We study several different problems related to nonlinear Schrödinger equations….

We prove several new results for the first equation: a modified scattering result for both an averaged version of the equation and the full equation, as well as a set of Strichartz estimates and a blowup result for the 3d cubic problem.

We also present an exposition of the classical work of Bourgain on invariant measures for the second equation in the mass-subcritical regime”--Abstract, page iv.