Digital Commons Network^™

Design, Determination, And Evaluation Of Gender-Based Bias Mitigation Techniques For Music Recommender Systems, Sunny Shrestha

Electronic Theses and Dissertations

The majority of smartphone users engage with a recommender system on a daily basis. Many rely on these recommendations to make their next purchase, download the next game, listen to the new music or find the next healthcare provider. Although there are plenty of evidence backed research that demonstrates presence of gender bias in Machine Learning (ML) models like recommender systems, the issue is viewed as a frivolous cause that doesn’t merit much action. However, gender bias poses to effect more than half of the population as by default ML systems are designed to cater to a cisgender man. This …

The Effect Of Nondiagnostic Information On Internal Auditor Skepticism: Capturing The Dilution Effect, Joseph Anthony Giordano

Electronic Theses and Dissertations

Internal auditors assigned to assess internal controls over financial reporting incorporate irrelevant information into their judgment, showing decreased skepticism when irrelevant information contradicts preconceived stereotypes of management, known as the dilution effect and attributed to the representativeness heuristic. Irrelevant information consistent with preconceived stereotypes does not decrease skepticism. In this experiment practicing internal auditors are provided an irrelevant description of the Chief Information Officer portrayed as either gregarious or introverted then subsequently receive relevant internal controls information. When the Chief Information Officer is described as gregarious, counter to common stereotypes, internal auditors assess risk as less likely to occur compared …

Does Publicness Matter? A Mixed Method Analysis Identifying And Measuring Institutional Contributions To State Goals For Public Higher Education, Sophia Laderman

Electronic Theses and Dissertations

States founded, control, and fund public postsecondary institutions because higher education helps meet state goals. Public institutions of higher education provide considerable public benefits to states, but these benefits have not been systematically measured. As a result, public conversations about the broad value proposition of higher education do not center the public benefits produced by institutions. Using a framework of empirical and realized publicness, this exploratory sequential mixed-methods study used content analysis of state agency mission and vision statements to identify state goals for public higher education. Quantitative measurements of institutional contributions to common state goals for higher education were …

Perspective Of Nurse Practitioners On The Use Of Ebr Embedded In The Electronic Medical Record, Deashandrea Thomas Williams

Electronic Theses and Dissertations

The methods by which U.S. healthcare services are delivered are changing within the healthcare delivery system. The decision-making processes of healthcare providers are being guided by standardized protocols, clinical guidelines, policies, and procedures developed through evidence-based research. These clinical-decision support tools are adopted by healthcare organizations and embedded into electronic medical records to improve and standardize care among healthcare providers. Although these clinical support decision tools are readily available to healthcare providers, it is important to understand how these tools are being perceived among nurse practitioners. It is vital that the healthcare system understand the experiences of nurse practitioners with …

Speech-Language Pathologists’ Barriers To Providing Services To The Deaf And Hard Of Hearing Children Ages 2–9, Irene S. García-Benavides

Electronic Theses and Dissertations

This qualitative case study explored the knowledge and experiences of 12 speech-language pathologists (SLPs) regarding the culture and linguistic processes of the Deaf culture when assessing and treating deaf and hard of hearing children ages 2 to 9. Data analysis has resulted in identification of the following main themes: (a) The Scope of Practice, (b) Barriers Regarding Culturally and Linguistically Informed Practices, and (c) Awareness of Similarities and Differences in Language Acquisition and Structures in English and American Sign Language (ASL). The findings of this study underscored the importance of knowledge that SLPs have to acquire in order to provide …

Mindfulness Based Stress Reduction Techniques In Chronic Illness, Anna Celia Gil

Electronic Theses and Dissertations

Abstract

Chronic stress and its effect on both physical and mental health have been a topic of increasing interest in the past several decades. There is mounting evidence that recurrent, persistent stress of both a physiologic and psychological nature leads to a dysfunction in the hypothalamic pituitary axis (HPA), the system which helps the body recover and adapt to short term stress. In long term stress, this HPA dysfunction leads to impairment of the immune and neuroendocrine systems resulting in chronic low-grade inflammation. This type of chronic inflammation acts as a precursor to several chronic illnesses such as diabetes, hypertension, …

Female Ex-Offenders Transitioning Into Society, Stacey L. Forte

Electronic Theses and Dissertations

The purpose of this qualitative study was to examine female ex-offenders’ perceptions of their lived experience(s) while transitioning into society after incarceration. This study examined risk factors that female ex-offenders faced while transitioning into society asking the question, “What are the lived experiences of female ex-offenders who utilized transitional housing for reentry with regard to their perception of the benefits of certain services/offerings and staff support?” Nine participants were part of the study ranging from 25–64 years of age, with the majority being between the ages of 25 and 55 years old, residing originally in five different states. Sixty percent …

Leadership Style In A Faith-Based Athletic Department Setting, Adam P. Ybarra

Electronic Theses and Dissertations

In this intrinsic case study, the researcher sought to explore athletic directors’ leadership styles with their coaches’ and administrators’ workplace satisfaction at a Christian-affiliated college in the Southwestern United States. The study explored which leadership style is likely to encourage motivation (i.e., achievement, recognition, growth) and hygiene factors (i.e., policies, supervision, work conditions), which could potentially increase or decrease job satisfaction. The data collection method was semistructured interviews conducted with athletic department personnel. The researcher transcribed and quality-checked the interviews against the audio recordings. The transcripts were member-checked by sharing them with each of the study participants. The researcher analyzed …

Numerical Study Of Owls’ Leading-Edge Serrations, Asif Shahriar Nafi

Electronic Theses and Dissertations

The silent flight ability of owls is often attributed to their unique wing morphology and its interaction with their wingbeat kinematics. Among these distinctive morphological features, leading-edge serrations stand out – these are rigid, miniature, hook-like patterns located at the leading edge of the primary feathers of their wings. It had been hypothesized that these leading-edge serrations serve as a passive flow control mechanism, influencing the aerodynamic performance and potentially affecting the boundary layer development over the wing, subsequently influencing wake flow dynamics. Despite being the subject of research spanning multiple decades, a consensus regarding the aerodynamic mechanisms underpinning owls’ …

Free Trade Is Not Free: A Case For Fair Trade, Wardah Javaid Cheema

Electronic Theses and Dissertations

To this day, mainstream economists favor free trade policies as the best way to generate economic development. They do so at the expense of their unjustified romanticization of reductionist classical trade theories. This thesis seeks to comprehend the constraints of traditional trade theories and their inability to be applied to practical contemporary problems. Further, contrary to the fundamental assumption of free trade theory, there is ample evidence of government intervention in free trade agreements. These interventions solely encourage and protect large corporations and investors rather than the actual development and sustainability factors, namely labor and the environment. It all adds …

Power System Dynamic Control And Performance Improvement Based On Reinforcement Learning, Wei Gao

Electronic Theses and Dissertations

This dissertation investigates the feasibility and effectiveness of using Reinforcement Learning (RL) techniques for power system dynamic control, particularly voltage and frequency control. The conventional control strategies used in power systems are complex and time-consuming due to the complicated high-order nonlinearities of the system. RL, which is a type of neural network-based technique, has shown promise in solving these complex problems by fitting any nonlinear system with the proper network structure.

The proposed RL algorithm, called Guided Surrogate Gradient-based Evolution Strategy (GSES) determines the weights of the policy (which generates the action for our control reference signal) without back-propagation process …

A Phenomenological Study Of Science Teachers’ Lived Experience: Pedagogical Judgment During The Covid-19 Pandemic, Amy Vo

Electronic Theses and Dissertations

At the beginning of the COVID-19 pandemic, in March of 2020, education in the United States changed dramatically. Science teachers began to look at the implementation of ambitious and equitable science teaching practices differently. Employing the hermeneutic phenomenological framework, the purpose of this study was to investigate the lived experience of science teachers, specifically looking at their pedagogical judgment related to ambitious and equitable science teaching. Semi-structured interviews, artifacts and surveys were used to develop a rich description of the phenomenon. Data analysis of the science teachers’ narratives, Qualtrics surveys, and lesson plans illuminated six essential themes common to all …

Mechanistic Insights Into Mftr-Dependent Regulation Of The Redox Cofactor Mycofactocin, Aigera Mendauletova

Electronic Theses and Dissertations

Organic redox cofactors are essential for life. While classic flavins and nicotinamides are widely distributed across all domains of life, nature has also evolved niche cofactors in subsets of life domains. For example, in Actinobacteria, coenzyme F420 is commonly used in place of flavin mononucleotide in enzymes associated with carbon fixation and oxidation of secondary alcohols. The importance of niche cofactors has long been recognized however, detailed understanding about their biosynthesis and physiological uses has been lagging. One class of niche cofactors is derived from ribosomally synthesized and posttranslationally modified peptides (RiPPs). To achieve their mature form, the genetically …

Artificial Emotional Intelligence In Socially Assistive Robots, Hojjat Abdollahi

Electronic Theses and Dissertations

Artificial Emotional Intelligence (AEI) bridges the gap between humans and machines by demonstrating empathy and affection towards each other. This is achieved by evaluating the emotional state of human users, adapting the machine’s behavior to them, and hence giving an appropriate response to those emotions. AEI is part of a larger field of studies called Affective Computing. Affective computing is the integration of artificial intelligence, psychology, robotics, biometrics, and many more fields of study. The main component in AEI and affective computing is emotion, and how we can utilize emotion to create a more natural and productive relationship between humans …

Plant Community Response To Control Of A Dominant Invader At Multiple Scales, Alexander R. B. Goetz

Electronic Theses and Dissertations

Control of invasive Tamarix spp. in riparian systems has long been a priority for management in western North America, but questions remain regarding the response of the broader plant community to different treatments. Here we summarize a series of approaches at different scales to quantify the effects of Tamarix control on characteristics of this ecosystem, including provisioning of wildlife habitat. In the first chapter we analyzed findings of the last 20 years using meta-analysis and found that although treatment has been successful in reducing Tamarix and promoting native vegetation to some extent, most literature reports very small effect sizes and …

Interactions In The Mind: Examining Metacognition's Role In Entrepreneurial Performance, John Sebesta

Electronic Theses and Dissertations

To better understand the mental processes that shape entrepreneurial performance, this dissertation examines the moderating effect of metacognitive abilities on the relationship between cognitive style and entrepreneurial alertness on performance at the opportunity identification and planning stages of the entrepreneurial journey. Prior research identifies these factors as components of an entrepreneurial mindset. However, the present research develops and examines theoretically driven predictions regarding how the factors interact. Using a sample of seventy teams participating in a business plan competition enables performance evaluation at these early steps in the entrepreneurship process. The hypotheses were not supported, but post hoc analyses indicate …

Problems With Machine Learning, High-Dimensional Data And Forecasting Stock Returns, Erik Mekelburg

Electronic Theses and Dissertations

Using a multi-level ensemble design, we forecast international stock market returns with a novel high-dimensional data set of aggregated cross sectional firm-level predictors. The method includes considerations of model uncertainty, parameter instability, model density and non-linearities with machine learning, shrinkage and model averaging. We provide evidence that it is important to systematically focus on all four sources of forecast failure, shed light on the sparsity/density debate in the stock return forecasting dialogue and contribute interesting findings on the efficacy dimensionality reduction with principal components analysis and partial least squares. The robustness of the approach is demonstrated through applications in four …

Terrain Cost Learning From Human Preferences For Robot Path Planning Using A Visual User Interface, Kaivalya Velagapudi

Electronic Theses and Dissertations

Robot navigation in terrains with limited exploration and limited knowledge has been a problem of interest in robotics due to the potential dangers that may arise during traversal. Due to the large number of path permutations within a complex and feature-rich real-world environment, and in the interest of saving time and ensuring safety, the robot should learn the optimal path without repeated exploration of the terrain. This can be accomplished by leveraging the path preferences of a human operator so that, with selective inputs, the agent can effectively learn a terrain-cost mapping in order to determine the optimal route, thereby …

Sorry Not Sorry: Microaggression Perpetrator Learning Readiness Factors, Kathryn Elaine Kelly Watson

Electronic Theses and Dissertations

Microaggressions are commonplace slights perpetuated against out-group members that reinforce negative stereotypes, often inadvertently and unconsciously. Workplace mitigation efforts have traditionally been focused on raising awareness with the belief that perpetrators are simply unaware of their actions. While these efforts have done much to raise awareness—especially for victims of microaggressions, who may be more sensitive than ever of their occurrence—some perpetrators consciously persist through awareness, often with even more negative implications to the victim such as minimization, dismissal, and further stereotype reinforcement. For perpetrators to change their behavior, in addition to classic behavioral change models that require capability, opportunity, and …

How Practices Drive Persistence: The Transformational Consumption Journey Of Native Americans In Higher Education, Gwen Locklear Almodovar

Electronic Theses and Dissertations

In an academic environment where many higher education institutions tout their diversity and inclusion statistics, there is a decline in the enrollment of Native American students and a decrease in Native American scholars. The President of the United States, in an October 2021 briefing and with the issuance of an executive order named The White House Initiative on Advancing Educational Equity, Excellence, and Economic Opportunity for Native Americans and Strengthening Tribal Colleges and Universities, saw the immediate urgency to understand the systematic causes and implement evidence-based strategies that will improve and increase student enrollment and academic advancement. This research takes …

Optimal Management And Sizing For Battery Energy Storage Systems For Grid Applications, Abdullah Muslih Alharbi

Electronic Theses and Dissertations

Battery energy storage systems (BESSs) play a dominant role in the reliability, resiliency, economics, and operational flexibility of the power grid. As such, the BESS is a promising and reliable green technology for supporting power grid facilities. However, the integration of BESS technology into power projects can be expensive and challenging, both technologically and in terms of regulation compliance. Thus, it is necessary to examine best practices for fully optimizing BESS sizing, operation, and scheduling in the context of benefiting BESS operators and investors by fully exploiting the valuable economic and technical benefits of BESSs. In this research, we identify …

Rocs: Robust Circular Seriation By Perturbation Entropy Minimization, Carla Rego

Electronic Theses and Dissertations

Identifying and creating patterns enables humans to fulfill their fundamental desire to make sense of things. At the center of this endeavor, seriation is a process of arranging objects to reveal regularities in their characteristics. We present a method to arrange objects cyclically to achieve orderliness based on a novel concept of perturbation entropy, which models the randomness of a sequence under local perturbations on the ordering. We derive a sharp upper bound on the perturbation entropy and develop an algorithm to search for an ordering that minimizes the upper bound. Connections with the traveling salesman problem and the quadratic …

Fabrication And Characterization Of Amlodipine Besylate Based Sub-Cutaneous Implants: Fabricated With The Help Of Hot Melt Extrusion, Kshitij Chitnis

Electronic Theses and Dissertations

Hypertension (HTN) can lead to heart attack, cardiac arrest, or coronary heart disease, and eventually death without proper treatment. Amlodipine Besylate (AMB) was approved by, US Food and Drug Administration in 1987, as a monotherapy for the management of HTN. AMB is commercially available in tablet (2.5, 5, and 10 mg) and solution (1mg/mL) dosage forms. However, adherence to the properly prescribed dosage form is critical and difficult for patients with chronic diseases such as HTN to prevent illness progression and death. The objective of the study was to develop AMB-loaded subcutaneous implants to reduce the frequency of administration, thus, …

Adversarial Explanations For Text-Based Local Surrogate Models, Christopher Burger

Electronic Theses and Dissertations

LIME has emerged as one of the most commonly referenced tools in explainable AI (XAI) frameworks that is integrated into critical machine learning applications–e.g., healthcare and finance. However, its stability remains little explored, especially in the context of text data, due to the unique challenges when it comes to perturbing the underlying data, data that requires a stricter measure of semantic and syntactic consistency. To address these challenges, we first evaluate the inherent instability of LIME on text data to establish a baseline, and then propose a novel algorithm XAIFOOLER to perturb text inputs and manipulate explanations that casts investigation …

Developing Biomolecular Hydrogen Evolution Catalysts Using De Novo Designed Self-Assembling Metallopeptides And Metallothionein Scaffolds, Sreya Malayam Parambath

Electronic Theses and Dissertations

The imbalance between the consumption and production of energy is one of the global issues of the century. At present, the most used source of energy is fossil fuel. Even though these are non-renewable source of energy that depletes over time, burning fossil fuel can cause several environmental problems, which include significant issues such as global warming; ocean acidification; and the issues such as water pollution from coal mining. Thus, it is important to find a renewable and environmentally friendly source of energy to meet the increasing demands of the rapidly growing global population. Hydrogen is considered a secure and …

Humanitarian Capitalism: Displaced Persons Resettlement In America, 1948-1952, Andrew Joseph Marion

Electronic Theses and Dissertations

This dissertation examines an American resettlement program for displaced Eastern and Central Europeans following World War II. Between 1948 and 1952, nearly 395,000 displaced persons (DPs) resettled to the U.S., and each resettled individual or family had an American sponsor who committed to providing housing and employment. The lobbying and creation of the resettlement legislation and the implementation of the program reflected the political, social, economic, religious, and cultural tensions both at home and abroad in these early Cold War years. DP resettlement occurred at a time when the U.S. and international community considered and adopted emerging human rights language …

Enhanced-Entropy Chaotic Circuit Design For Overhead-Constrained Hardware Security Applications In Integrated Circuits, Partha Sarathi Paul

Electronic Theses and Dissertations

This document presents a Ph.D. dissertation that focuses on designing overhead constrained circuits for chaos-based hardware security applications in integrated circuit (IC) technology. The designed circuits are optimized for promising chaotic behavior while maintaining the constrained area, delay, and power budget. This research includes proposing novel circuit topologies for attaining superior chaotic complexity, analyzing chaotic performance with multiple metrics, proposing the designs for real-world hardware-security applications that leverage proposed circuit topologies, and analyzing the security aspects of the designed applications. Multiple circuit design techniques are presented in this document. All the proposed works fall under the central motivation of designing …

Photophysical Characterization Of Small Organic Molecules Via Time-Resolved And Steady-State Spectroscopic Techniques, Cameron Luke Smith

Electronic Theses and Dissertations

This dissertation describes in detail the photophysical characterization of novel organic dyes in the infrared region for bioimaging purposes in a rapidly evolving field which originates from the need for more efficient and bright systems that are capable of replacing current commercial options and functioning in biologically relevant media. Biological tissue, whether it be muscle, adipose, or epithelium, has a higher scattering efficiency, greater light attenuation, and stronger autofluorescence at shorter wavelengths, thus limiting the biological window to longer wavelengths. The goal of this dissertation was the comparison of novel organic dyes for commercial development as bioimaging dye candidates with …

Harness Therapeutic Potential Of Immune Responses: Molecular Characterization And Targeted Delivery, Nan Ji

Electronic Theses and Dissertations

The immune system plays a crucial role in protecting the body from harmful pathogens and cancer cells and maintaining tissue homeostasis. Immunotherapy has shown significant potential in treating various diseases by harnessing the therapeutic potential of immune responses through the targeting of different immune cells, receptors, and signaling pathways. This dissertation investigated two immune modulators for their immune-enhancing potential.In the first chapter, the components of innate immunity are introduced. In the second chapter, Immulina, a commercially available extract of Arthrospira platensis enriched with Braun-type proteins, was studied for its immunostimulatory effect in mouse bone marrow-derived dendritic cells and macrophages. The …

Determining Background Deep-Time Critical Zone Conditions In Mississippi Preceding The Onset Of Paleocene-Eocene Hyperthermals, Savannah Reese Rathbun

Electronic Theses and Dissertations

Hyperthermals are periods of extremely rapid global warming. In order to understand the magnitude of hyperthermals, a more complete understanding of background conditions must be established. My goal is to study the paleoclimatic conditions that existed prior to the onset of Paleocene- Eocene hyperthermal events in order to establish background conditions. Relatively thick Paleocene and Eocene sedimentary units ideal for this study are present in the Mississippi Embayment (MSE), a major southwest- dipping sedimentary basin in the Gulf of Mexico coastal region of North America. The MSE contains an extensive record of Paleocene strata that were deposited prior to the …