Digital Commons Network^™

A Machine Learning Approach To Stochastic Optimal Control, Pablo Ever Avalos

Open Access Theses & Dissertations

Merton's portfolio optimization problem is a well-renowned problem in financial mathematics which seeks to optimize the investment decision for an investor. In the simplest situation, the market consists of a risk-less asset (i.e. a bond) that pays back a relatively low interest rate, and a risky asset (i.e. a stock) that follows a geometric Brownian motion. The optimal allocation strategy of the investor's wealth is found by optimizing the expected utility along the stochastic evolution of the market. This thesis focuses on several different applications of this optimization problem. We look at pre-constructed analytical solutions and showcase the results. We …

Material Synthesis And Additive Manufacturing Of Ceramics, Elsa Bramasco-Rivera

Open Access Theses & Dissertations

This research is divided into two main topics: vitrimer polymers and alumina ceramics. Additive manufacturing is an emerging technology. In this research, two main methods of additive manufacturing are used: material extrusion and vat photopolymerization. The hypothesis of self-healing and mechanochromism functionalities was tested through the synthesis of vitrimers, a novel material combining properties of both thermosets and thermoplastics. These vitrimers were 3D printed using material extrusion. Casted vitrimers showed stiffening effects after submergence in water. Lithography based ceramics have gained attention in recent years due to their wide range of applications. Alumina ceramics were additively manufactured using digital light …

Lipid Rafts, Exosomal Vesicles And Anti-Giardial Therapies, Brian Ivan Grajeda

Open Access Theses & Dissertations

Giardia lamblia, a protozoan parasite, is a major cause of waterborne infection, worldwide. While the trophozoite form of this parasite induces pathological symptoms in the gut, the cyst forms transmit the infection via contaminated water. Since Giardia is a non-invasive parasite, the actual mechanism by which it causes infection remains elusive. We have previously reported that Giardia assembles cholesterol and GM1 glycolipid-enriched lipid rafts (LRs) that participate in encystation and cyst production. To further delineate the role of LRs in pathogenesis, we isolated LRs from Giardia and subjected them to proteomic analysis. Various cellular proteins including the virulent proteins—e.g., giardins, …

Students' Perceived Value Of Women's And Gender Studies And Chicana/O Studies At A Hispanic Serving Institution: A Quantitative Analysis Of "The Studies" In Higher Education, Hilda Na Ontiveros

Open Access Theses & Dissertations

Previous research indicates that “The Studies” are helpful to students at both K-12 and higher education levels. Most of these studies focus on K-12 schools, fewer are at the higher education level, and few use quantitative methods to examine students’ perceptions of “The Studies.” The purpose of this study is to research students’ perceived value of Women’s & Gender Studies and Chicana/o Studies at a Hispanic Serving Institution. This quantitative study employed a feminist framework and methodology to develop a survey instrument and to analyze the survey responses from students who took courses in Women’s & Gender Studies and Chicana/o …

Contribution Of A Higher Educational Institution Towards Advancing Sustainability In The West Texas Paso Del Norte Region, Anand Raj

Open Access Theses & Dissertations

Sustainability comprises primarily three elements; environmental, social, and economic, which can be considered the keys to humanityâ??s survival and wellbeing. The pillars can alternately be given informal names: planet, people, and profit. Sustainability is achieved by effectively utilizing available resources through different sustainable development efforts. Generally, groups or entities come together to create sustainable impact in the three primary elements discussed here. City councils, businesses, and higher education institutions are just a few of the entities that engage in sustainability efforts. It is valuable to appraise the role played by a higher education institution in advancing sustainability in the context …

Enhancement Of Fabrication Procedures By Modularization, Andres Sagredo

Open Access Theses & Dissertations

Fabrication of semiconductor technology grows in importance every year, from metal-oxide-semiconductor (MOS) technology to fabricating integrated circuits (ICs) used in everyday life. These ICs are implemented into computers, phones, and vehicles for complex functions and safety features. Another semiconductor technology is microelectromechanical systems (MEMS), located in actuators and sensors on multiple systems. In academia, it is inherently essential for students to learn the theory of such devices and have exposure to the fabrication process of the technology in question. The importance of theory and practice in fabrication is skyrocketing due to the global chip shortage, making workforce development vital for …

The Ideal Mentor: A Qualitative Study On Underrepresented Students' Perspectives On Mentoring Relationships In Engineering, Sergio Armendariz

Open Access Theses & Dissertations

Engineering stands as one of the disciplines with the highest rates of student attrition, which is exacerbated by the misrepresentation of women and racial/ethnic minorities (Roy 2019). As a response, multiple universities have launched successful initiatives to recruit women and racial/ethnic minorities into engineering degrees, but have continued to fail in retaining that same student demographic. Mentoring relationships have been regarded as an efficient strategy to mitigate the rates of attrition in engineering degrees (Wilson et al. 2012). However, mentorship in engineering is likewise lacking in diversity, and positive outcomes of mentorship are not universal. Nonetheless, successful mentoring relationships do …

Electrothermal Plenum Thruster Simulations Varying Input Pressure And Voltage, Naomi Nicole Ingram

Open Access Theses & Dissertations

A radiofrequency electrothermal thruster is designed and simulated to create a low ionization energy plasma from a neutral propellant using a radio-frequency power. With an asymmetrical surface area ratio between the grounded and powered electrode, ion-neutral charge exchange collisions occurring within the propellant result in propellant heating. The Electrothermal Plenum Thruster conducts this propellant heating in an annular plenum chamber in attempt to maximize propellant heating. A software called CFD-ACE+ is utilized to demonstrate the effects of an enhanced sheath from the asymmetrical power coupling arrangement. Two sets of simulations are run to understand how input variables affect the plasma …

Family Disruptions And Maternal Health In Covid Times, Donna Maldonado

Open Access Theses & Dissertations

AbstractPrenatal and postpartum women of the border region of El Paso-Ciudad Juarez have been experiencing multiple forms of family disruption due to the twenty-month border closure in an attempt to contain the COVID pandemic, partners having to find jobs far away from home because of economic concerns, and fear of familial disruption due to the threat of deportation of partners or family members. The purpose of the study is to explore the perceived effects of these types of family disruptions and how they are shaping maternal health in COVID times. This project included the analysis of fifteen interviews with pregnant …

Transformative Pedagogy And Science Identity In Undergraduate Anatomy And Physiology, Emily Ann Royse

Dissertations

Anatomy and Physiology (A&P) courses are undergraduate biology prerequisite courses that cover many topics about human biology, including anatomy, histology, organ systems, and homeostasis. The purpose of the course is to equip students aiming to enter nursing and allied health education programs with an understanding of basic biological principles relevant to human biology and pharmacology. However, these courses have a high incidence of failure, and many students need to retake the course to progress in their competitive academic programs. Students tend to rely on memorization techniques to learn the course content, and given the nature of A&P as a discipline, …

Decentralizing The Music Industry: New Media Create Gateways For Independent Musicians, Jessica Carr

Research Papers

Throughout most of the twentieth century, major record labels were the gatekeepers to mainstream music. They controlled every aspect of the music industry, from artist recruitment through final music production and distribution. However, technological progress and the creation of new media platforms near the turn of the twenty-first century caused major disruptions to the traditional methods previously used by record labels to maintain control over music production, distribution, and monetization.

This research aims to explore how the creation of new media has disrupted traditional strategies utilized by major record labels, and how technology has helped to create gateways for independent …

A Research Framework And Initial Study Of Browser Security For The Visually Impaired, Elaine Lau, Zachary Peterson

Master's Theses

The growth of web-based malware and phishing attacks has catalyzed significant advances in the research and use of interstitial warning pages and modals by a browser prior to loading the content of a suspect site. These warnings commonly use visual cues to attract users' attention, including specialized iconography, color, and an absence of buttons to communicate the importance of the scenario. While the efficacy of visual techniques has improved safety for sighted users, these techniques are unsuitable for blind and visually impaired users. This is likely not due to a lack of interest or technical capability by browser manufactures, where …

Combating Childhood Obesity In Rural Areas - A Systematic Review, Ramanjot Bains

Research Papers

No abstract provided.

Tiered Centralized Education In The Transition-To-Practice Program To Improve Nurses' Level Of Confidence On Nursing Sensitive Indicators Outcomes, Froiland Agana Ascaño

Doctoral Projects

A tiered Centralized Education in the Transition-to-Practice (TTP) Program is crucial to improving nurses' Level of Confidence on nursing-sensitive quality indicators. The benefits of a structured orientation program taught by trained content experts are evident in the literature. In addition, training transition-to-practice RNs during onboarding with training and assessment sessions throughout the orientation program to increase frequency provides skills acquisition. This study examined the impact of a house-wide education program on the nurses' confidence levels of CLABSI prevention, a measured nursing-sensitive quality indicator. This quasi-experimental quality improvement study measured the confidence and comfort levels of transition-to-practice RNs and identified that …

The Effects Of The Covid-19 Pandemic On The Fear Of Missing Out, Anxiety, And Loneliness, Hannah Turner

Honors Theses

The unprecedented nature of the COVID-19 pandemic implores consideration for how the psychopathological constructs the fear of missing out, anxiety, and loneliness are affected within this context (Liverant et al., 2004; Rajkumar, 2020). These mental well-being variables also all appear in association with social media (Hunt et al., 2018; Caplan, 2007). While previous research has explored the initial impacts of the pandemic on mental well-being (Wang, Pan et al., 2020; Bu et al., 2020), this research further examines the effect on college students’ mental well-being in the pandemic alongside social media usage. I hypothesize that levels of the fear of …

Incorporating In Situ Measurements Of Energy Into A Designed Method Of Detection Of Radiation Induced Degradation In Embedded Systems, Delwyn Sam

Honors Theses

An embedded system, or a system-on-chip (SOC), is a miniaturized computer that combines hardware and software to accomplish a certain purpose. Embedded systems are used in various applications from household appliances to the automobile industry. Additionally, SOCs are used in space environments where the surroundings consist of radiation and extreme temperatures. In these harsh conditions, embedded systems must operate properly through the effects of radiation such as total ionizing dose (TID). Because embedded systems are filled with various components and modules, and since the internal signals of the system are often inaccessible, methods to locate which specific parts of the …

Blue: A Stylistic Analysis Of Blue Mitchell, David Michael Moore

Dissertations

This study examined ten transcriptions of improvised solos by trumpeter Blue Mitchell. Mitchell was a prominent performer in the hard bop style known for his tenure with the Horace Silver Quintet. The transcriptions were selected from recordings produced between 1958 and 1977. These pieces include “Sir John,” “Peace,” “Strollin’,” “Why Do I Love You?,” “Chick’s Tune,” “Gingerbread Boy,” “I Love You,” “Quiet Riot,” “Silver Blue,” and “OW!” The chosen transcriptions were analyzed and compared for common melodic devices such as motivic development, use of sequence, blues language, bebop language, and melodic quotes from other songs, which are all common elements …

At Risk For Success: Promising Practices In Their Own Voices, Amber Leigh Mcelwee

Dissertations

This qualitative phenomenological study utilized high school graduate perceptions to identify pedagogical methods, educational structures, and school supports that improved their participation, inclusion, and growth within their classrooms and coursework. The research was focused on students identified at-risk to graduate high school and how educational supports affected the success or constraint in attaining their diploma. The research design applied a connected learning framework structure with a focus on student interest, relationships, and opportunities as defined by the Connected Learning Alliance. One component of connected learning was student-centered learning; therefore, an examination of John Dewey’s educational philosophy of student-centered practices and …

Mothers’ Perspectives On Language And Literacy Development In Children With Disabilities Adopted From China, Jessica B. Hovland

Dissertations

Children with disabilities and special needs make up the vast majority of those currently being adopted internationally into the United States (U.S.). China has been a leading sending country for international adoption since the 1990s and remains one of the few nations with thousands of orphaned or abandoned children, many with congenital disabilities or significant medical needs, in government welfare institutions. While most children adopted internationally (CAI), whether from China or other nations, experience developmental catch-up after adoption, children with disabilities and those who spent time in institutional settings exhibit persistent language deficits that impact literacy and academic skills as …

Are Natural Killer Cells Novel Mediators Of The Effects Of Cannabidiol On Mental Health, Sleep Quantity, Sleep Quality, And Immune Function?, Jacob Norbert Kisiolek

Dissertations

Cannabidiol (CBD) has increased in popularity since the United States Farm Bill legalized hemp production in 2018 and is now projected to become a $24.4 billion dollar industry by 2025. Since its legalization, CBD is thought to be an antiepileptic, anxiolytic, and antipsychotic, as well as an agent to improve mental health, quality of life, aspects of sleep and immune function. However, many of these claims lack scientific evidence. The purpose of this randomized, double blind, placebo-controlled trial was to determine the effects of an 8-week CBD intervention on measures of mental health, sleep quantity, sleep quality, and natural killer …

Heritability Of Maxillary Dental Arch Dimensions In A Pedigreed Sample Of Hamadryas Baboons, Samuel Park

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

This thesis presents a study of heritability of maxillary dental arch dimensions in a captive baboon colony. Arch dimensions are important subject because they influence the entirety of the craniofacial and masticatory complex. The goal of this study was to quantify the relative genetic influence on arch dimensions and the nature of this influence at different points along the maxillary arcade. Referencing virtual, three-dimensional dental cast scans, widths were measured at different points between the a) maxillary left and right canines, and b) maxillary left and right first molars (M1). Specifically, measurements were taken at the inner (lingual) gingival margin, …

Quantifying The Relationship Between Pond Size And Water Quality, Rebekah Mason

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

The water quality of ponds, streams, and groundwater is at risk due to agricultural and urban development. Implementation of ponds near developmental areas can act as catchment sites to reduce further water pollution (Bichsel et al., 2015). However, maintenance of pond water quality is necessary for continued water supply to livestock and general recreational use. The present study aimed to determine the relationship between pond size (surface area range from 142 to 5336 m²) and water quality. Analysis of water quality parameters, including dissolved oxygen, nitrate, phosphate, and chlorophyll-a, were conducted during the summer of 2021 and winter …

2022 May - Tennessee Monthly Climate Report, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Monthly Reports

No abstract provided.

Effects Of Noise, Light, And Landscape On Birds In A Recently Urbanized County, Karina Alejandra Sanchez

Dissertations

Anthropogenic activities are drastically and rapidly altering ecosystems. Research has found that urban environments support less biodiversity than non-urban environments. This work has inspired recent interest investigating animal behavior and individual reproductive success in urban wildlife as mechanisms to why biodiversity is lower in urban areas. For my dissertation research, I used three key urban characteristics; noise, light, and landscape composition to study the effects of urbanization on avian species across Weld County, CO. I used these measurements to test the overarching hypothesis that urban land characteristics alter avian community structure and more specific hypotheses regarding how each factor (noise, …

Financial Analysis Of New Medicare And Medicaid Guidelines, Reimbursement Rates, And Increased Enrollment On Four Nebraska Clinics, Jamilah J. Abdul-Hakim

Capstone Experience: Master of Public Health

Government health insurance plans such as Medicaid and Medicare were created with the intention of providing elderly, low-income, or disabled citizens with affordable and quality health insurance through government-contracted providers (Baicker et al., 2013). Medicare is a government health insurance program that provides healthcare to United States citizens 65 years and older, regardless of their income or past medical history. Medicaid was implemented as an assistance program to provide health insurance for low-income Americans and their families. Medicaid is administered by each state independently, which creates variation in reimbursement rates, services, and structure. (Grabowski, 2007).

Providers accepting Medicare and Medicaid …

A Survey And Analysis Of Educational Materials Addressing The Health Consequences Of Drinking Nitrate Contaminated Water In Medical Clinics Located In The Most At-Risk Areas Of Nebraska: Are Healthcare Providers Equipped To Protect And Educate Their Patients?, Laura Nagengast

Capstone Experience: Master of Public Health

Background: Eighty five percent of Nebraskans rely heavily on groundwater sources, including private wells, as their primary source of drinking water. Nitrate is one of the most common chemicals found in private well water. Numerous studies demonstrated the serious human health consequences from prolonged nitrate exposure. Therefore, due to the potential health risks, this project aimed to identify and evaluate the existing knowledge and awareness among healthcare providers as well as the educational materials in medical clinics in Nebraska related to health effects of drinking nitrate contaminated water.

Methods: An 8 multiple choice question survey was developed using Microsoft Forms. …

Weight Gain Trajectory Over Five Years For Adult Primary Care Patients In Nebraska, Elizabeth M. Morris

Capstone Experience: Master of Public Health

INTRODUCTION: The continued rise in the prevalence of adult obesity in the United States is a public health concern. Several studies have identified the increasing rates of obesity, its impacts, and the factors leading to obesity. Some researchers have made obesity prevalence projections at the national and state levels. This study aims to fill the critical gap in real-time weight data trends among primary care adult patients in Nebraska. The main goal of this study is to determine and analyze the weight trajectory of adults in Nebraska over the past five years and determine if the trends vary among age …

Assessing Facilitators And Barriers To Enrolling In Cardiac Rehab, Michaela R. Geiser

Capstone Experience: Master of Public Health

Abstract: Heart disease has been a leading cause of death since the early 1900s (Heron & Anderson, 2016). Americans are at higher risk for heart disease if they have high blood pressure, high cholesterol, are overweight, inactive, and smoke, among other risk factors (CDC, 2019). If a person already has heart disease or has had a cardiac intervention (such as a stent), they may be referred to a local cardiac rehab program. Bryan Health in Lincoln, NE, currently offers two methods of delivering cardiac rehab: in-person or home-based. Research has not yet been done to assess enrollment facilitators and barriers …

A Quantitative Job Satisfaction Comparison Between Certified Nursing Assistants (Cnas) Providing Care In Patients’ Homes Versus In Long-Term Care (Ltc) Facilities In The Omaha Metropolitan Area, Rusheena Shah

Capstone Experience: Master of Public Health

This capstone project looks at overall job satisfaction comparison between two groups of Certified Nursing Assistants (CNAs) – CNAs who provide home care in patients’ homes and CNAs who provide care in Long-term Care (LTC) facilities in the Omaha Metropolitan Area. In this quantitative study, a survey was sent to CNAs who provide home care to patients and CNAs who provide patient care at different nursing home facilities in the Omaha area. Prior research has indicated that even though CNAs perform similar job duties irrespective of the work environment; they experience varying degrees of job satisfaction which could be attributed …

Online Ordering Vs Offline Ordering After Covid-19 Pandemic: Consumer Characteristics – Security & The Shopping Experience, Catherine Cano

Honors Program Theses and Research Projects

It’s no secret that the COVID-19 pandemic has significantly altered consumer shopping habits. However, these changes are novel and not yet understood. Since the onset of the pandemic, we have experienced restrictions on businesses, quarantines, and public unease. Online shopping became more of a focus for many businesses. It could appeal to people who were apprehensive about the virus along with those who enjoy its convenience. This paper examines consumer perceptions of online shopping before vs. after the pandemic, as well as the characteristics of online shoppers with an emphasis on concerns about safety and losing the in-person shopping experience. …