Digital Commons Network^™

Fluid Dynamics Characterization Of Transcatheter Aortic Valves, Mohammed Barakat

Electronic Theses and Dissertations

Aortic stenosis due to degenerative calcific aortic valvular disease is the most reason for aortic valve replacement in developed countries. Aortic stenosis affects up to 7% of the world population, and current clinical data indicate that the number of the affected people could be triple by 2050, due to population ageing and health lifestyle. Transcatheter aortic valve replacement (TAVR) was introduced as a minimal invasive treatment of severe aortic stenosis. Even though surgical aortic valve replacement (SAVR) is considered the golden standard treatment for severe aortic stenosis patients, TAVR showed equivalent or even superior outcome compare to SAVR. Currently, transcatheter …

Lessons From Controversy: Interpreting The Sand Creek Massacre In Colorado, Katherine Rose Hoadley

Electronic Theses and Dissertations

This thesis is a case study of the 2012 History Colorado Center exhibit, Collision: The Sand Creek Massacre, 1860s – Today. Collision was an exhibit that attempted to showcase the history of the Sand Creek Massacre – an 1864 event where well over one hundred peaceful Cheyenne and Arapaho people were murdered by the 3rd Regiment of the Colorado Military District. Collision remained open for a little more than a year – this thesis interrogates the reasons behind its closure and its status as a controversial museum exhibit. The findings of this thesis show that a lack of collaboration …

Perceived Quality Of Clinical Supervision And Level Of Vicarious Trauma In Therapists-In-Training, Jessica L. Mantia

Electronic Theses and Dissertations

This study examined the relationship between perceived quality of clinical supervision and levels of vicarious trauma (VT) and secondary traumatic stress (STS) in a sample of novice therapists who reported working with survivors of sexual trauma. The researcher included therapist’s personal sexual trauma history and history of therapy for sexual trauma as covariate variables. Results did not support the predictive value of clinical supervision in determining level of VT or STS in this population. There were no meaningful differences among groups based on personal history of sexual trauma or participation in therapy. A high percentage of participants in this sample …

Digitizing The Aura: A Systems Update For The Contemporary Art World, Emilie Trice

Electronic Theses and Dissertations

During the digital tide of the last several decades, the material, metaphysical and economic properties of art have evolved in response to the ever-accelerating growth of cybernetics. The contemporary art ecosystem (CAE) has long been considered “the last unregulated financial market”; then cryptocurrency was invented. Now, blockchain technology has entered the cultural zeitgeist and could radically innovate numerous industries, including the art market. The CAE itself is a network, a system that operates within fundamental parameters and, in that sense, it shares much in common with the philosophies underlying computation, such as systems theory, complexity theory and emergent consensus mechanisms. …

Microgrid-Enabled Reactive Power Support To Enhance Grid Economics, Sarhan Hasan

Electronic Theses and Dissertations

Reactive power plays an essential role in voltage control and stability in electric power systems. Various Volt/VAR techniques are utilized in electric power systems to maintain the voltage profile within defined acceptable limits and accordingly provide reliability and stability. Reactive power has been commonly generated through large-scale synchronous generators or distributed capacitor banks to provide proper transmission and distribution level system management, however, reactive power can be further used as an effective means to reduce total system operation cost. In this dissertation, an optimal reactive power model is proposed to determine the optimal nodal reactive powers that result in the …

Cellular And Developmental Insights Into The Early Evolution Of Muscle, Jeffrey J. Colgren

Electronic Theses and Dissertations

Whereas a great deal has been learned about the molecular underpinnings of morphological evolution in animals, much less is known about the origin of novel cell and tissue types. During the time in which the earliest animal lineages were diversifying, fundamental cell and tissue types, such as muscles, arose. Sponges are one of two animal lineages that lack muscles, yet they undergo coordinated full body contractions. Whereas the signaling processes have been studied, the physical mechanisms of contraction are completely uncharacterized. The main purpose of this work is to understand the primary contractile tissue of the sponge Ephydatia muelleri, …

Gifted Identification In Young, Historically Underrepresented Populations: A Phenomenological Study, Meryl A. Faulkner

Electronic Theses and Dissertations

The purpose of this phenomenological study was to examine the implications of the low numbers of identified gifted young, historically underrepresented students. The research questions that guided this study were: what are educators’ experiences of the gifted identification process of young, historically underrepresented students? What are parents’ experiences of the gifted identification process for their young, historically underrepresented child?

Participants were parents of a student from an underrepresented population (American Indian or Alaskan Native, Latinx, Black or African American, and Native Hawaiian or Other Pacific Islander) identified gifted in second grade or younger or educators who were involved in the …

The Effects Of Adverse Childhood Experiences On Behavioral Outcomes, Jennifer Thomas

Electronic Theses and Dissertations

This study intends to explore the intersection of two vulnerable populations, early childhood development and risks associated with exposure to adverse childhood experiences (ACEs). This study examines how age plays a role in the long-term relationship between ACEs and internal and external behaviors. This study seeks to answer the question of: How does age influence the relationship between number of ACEs and internal and external behaviors? The participants in this study include those aged 0 – 16 from the National Survey of Child and adolescent Well-Being (NSCAW) dataset. The NSCAW study consists of five waves of data where Wave I …

Dis/Ableist Consumption: A Critical Thematic Analysis Of Avowed And Ascribed Neuro-Identities In The Classroom, Shaundi C. Newbolt

Electronic Theses and Dissertations

In the United States, faculty and students are publicly claiming neurodivergent identities and support for the neurodiversity movement. This study uses Collier and Hecht’s cultural identity theories with Lang and Chen’s two-step process, critical thematic analysis (CTA), to examine avowals and ascriptions with four diagnostic terms, ASD, ADHD, bipolar disorder, and dyslexia, of students and professors from Rate My Professors (RMP) with Ritter’s frame of RMP as a phenomenon.

A total of 1,022 posts are analyzed to understand how students resist or re-inscribe popular medical model/deficit discourse in the classroom: student avowals (N = 232), professor avowals (N = 51), …

The Interplay Between Economic Growth And The Environment: The Case Of China, Christian D. Carpio-Thomas

Electronic Theses and Dissertations

Historically, economic development has come at the cost of environmental degradation. Since the 1980s, neoliberalism rooted in neoclassical theory has dominated mainstream economic thought. The result has been a dramatic increase in environmental degradation in favor of economic growth. The neoliberal recommendations toward development are encapsulated in the Washington and post-Washington Consensuses which promote the liberalization of trade and foreign investment as well as a reliance on market mechanisms. Ultimately, the goal of neoliberalism is to generate growth regardless of the impact that it places on the environment. The case of China presents an example of an economy which pursued …

Gas Adsorption In Carbon Nanohorns: Equilibrium And Kinetics, Justin Matthew Petucci

Electronic Theses and Dissertations

A study of gas adsorption has been carried out with the focus of better understanding the relationships between the individual properties of the adsorbent/adsorbate (e.g. material structure, interactions, gas size and shape, etc.) and the overall adsorptive properties of the combined system (e.g. capacity, binding strength, equilibration time, etc.) as a function of thermodynamical variables. This is useful from the perspective of a comprehensive and fundamental understanding as well as for practical applications. The equilibrium regime of adsorption on carbon nanostructure materials (nanohorns, nanotubes, and graphite) is investigated using molecular statics (MS) and grand canonical monte carlo (GCMC) methods for …

The Colored Pill: A History Film Performance Exposing Race Based Medicines, Wanda Lakota

Electronic Theses and Dissertations

Of the 32 pharmaceuticals approved by the FDA in 2005, one medicine stood out. That medicine, BiDil®, was a heart failure medication that set a precedent for being the first approved race based drug for African Americans. Though BiDil®, was the first race specific medicine, racialized bodies have been used all throughout history to advance medical knowledge. The framework for race, history, and racialized drugs was so multi-tiered; it could not be conceptualized from a single perspective. For this reason, this study examines racialized medicine through performance, history, and discourse analysis.

The focus of this work aimed …

Automated Change Detection In Privacy Policies, Andrick Adhikari

Electronic Theses and Dissertations

Privacy policies notify Internet users about the privacy practices of websites, mobile apps, and other products and services. However, users rarely read them and struggle to understand their contents. Also, the entities that provide these policies are sometimes unmotivated to make them comprehensible. Due to the complicated nature of these documents, it gets even harder for users to understand and take note of any changes of interest or concern when these policies are changed or revised.

With recent development of machine learning and natural language processing, tools that can automatically annotate sentences of policies have been developed. These annotations can …

Caballerismo In Latinx Men In Higher Education, Victor Carrasco

Electronic Theses and Dissertations

Latinx men continue to be marginalized in higher education, and more research is needed to understand how to retain them using anti-deficit frameworks (Cook et al., 2012). Studies have investigated caballerismo as a protective factor for LatinX men. Caballerismo is defined by egalitarian beliefs, affiliation, positive family relationships, and empathy (Arciniega et al., 2008; Neff, 2001). Despite its promise as an anti-deficit framework, little is known about how caballerismo informs Latino students’ experiences in higher education. Therefore, this study addresses the following research questions: a) How does caballerismo manifest in Latinx men in higher education, b) how does caballerismo intersect …

Development Towards An Ethylene Sensing Artificial Metalloenzyme, Mitchell Lee Ellinwood

Electronic Theses and Dissertations

Ethylene (ethene) is the essential ripening hormone for climacteric plants, and consequently its detection and quantification is of considerable interest to the horticulture industry. Its detection however is a non-trivial pursuit, traditionally requiring expensive and inaccessible instrumentation that fail to provide in vivo information about ethylene. A ruthenium based fluorescent probe for the selective detection of ethylene has recently been developed, and it was envisioned that this probe could be made biocompatible by encasing it within a protein scaffold making it an artificial metalloenzyme. To this end biotinylated N-heterocyclic carbenes (NHCs) were synthesized, which can be appended onto the ruthenium …

Is The Reliability Of Objective Originality Scores Confounded By Elaboration?, Shannon Marie Maio

Electronic Theses and Dissertations

The increased use of text-mining models as a scoring mechanism for divergent thinking (DT) tasks has sparked concerns about the ways in which automated Originality scores may be influenced by other dimensions of DT, especially Elaboration. The debate centers around the question of whether too much variance in automated Originality scores is accounted for by the number of words a participant uses in a response (i.e., Elaboration), and, thus, how the influence of Elaboration can affect the reliability of Originality scores. Here, a partial correlation analysis, in conjunction with text-mining and psychometric modeling, is conducted to test the degree to …

Real-Time Detection Of Demand Manipulation Attacks On A Power Grid, Srinidhi Madabhushi

Electronic Theses and Dissertations

An increased usage in IoT devices across the globe has posed a threat to the power grid. When an attacker has access to multiple IoT devices within the same geographical location, they can possibly disrupt the power grid by regulating a botnet of high-wattage IoT devices. Based on the time and situation of the attack, an adversary needs access to a fixed number of IoT devices to synchronously switch on/off all of them, resulting in an imbalance between the supply and demand. When the frequency of the power generators drops below a threshold value, it can lead to the generators …

Power System Frequency Control And Stability Analysis With Increasing Renewable Energy Penetration Level, Weihang Yan

Electronic Theses and Dissertations

With the ever-increasing penetration level of renewable energy generation units and the replacement of traditional synchronous generators, the issues associated with the deteriorated performance of power system frequency regulation and potential grid frequency instability become more significant. In this dissertation, the inertial control algorithms are investigated and analyzed for power electronics converter in a renewable energy generation unit. The concept and design of Virtual Synchronous Generator are comprehensively discussed, such that the small-signal stability and frequency stability of power systems with high renewable energy penetration level can be enhanced. Moreover, both nonlinear dynamic model and small-signal linearization of Virtual Synchronous …

System Update: Technology Based Intervention For Students With Intellectual And Developmental Disabilities, Marisa C. Simoni

Electronic Theses and Dissertations

Post-school outcomes are unfavorable to students with intellectual and developmental disabilities (IDD). Despite these outcomes and significant academic challenges, students with IDD have the potential to learn adaptive and life skills that lead to a more independent and fulfilling life through intentional intervention strategies. This dissertation explores technology-based interventions for students with IDD. Manuscript 1 presents a synthesis of literature related to technology, IDD, and a system of supports that schools utilize for tiered intervention delivery. Based on the findings, a new framework, Systems of Support for Technology Intervention (SSTI), is introduced to help guide school psychologists in choosing appropriate …

Xylo-Bot: A Therapeutic Robot-Based Music Platform For Children With Autism, Huanghao Feng

Electronic Theses and Dissertations

Children with Autism Spectrum Disorder (ASD) experience deficits in verbal and nonverbal communication skills, including motor control, emotional facial expressions, and eye gaze / joint attention. This Ph.D. dissertation focuses on studying the feasibility and effectiveness of using a social robot, called NAO, and a toy music instrument, xylophone, at modeling and improving the social responses and behaviors of children with ASD. In our investigation, we designed an autonomous social interactive music teaching system to fulfill this mission.

A novel modular robot-music teaching system consisting of three modules is presented. Module 1 provides an autonomous self-awareness positioning system for the …

China’S One Belt One Road Initiative—A Debt Trap?, Qi Liu

Electronic Theses and Dissertations

Infrastructure has been a bottleneck for industrialization of developing countries. After decades of economic growth led by investment in infrastructure, China released its first global strategy in 2013, One Belt One Road (BRI), to improve infrastructure in less developed countries along the belt and road. Although economic development has been witnessed in some BRI members, large amount of investments from China raised concern over debt crisis from the Western world and host countries. Countries receiving loans from China are struggling to effectively manage the BRI projects. Some are renegotiating the investments with China and some BRI members even canceled them. …

Windows Into The Unseen The Power Of Metaphor As Revealed By Paul Ricoeur And Moses Maimonides, Claire E. Molk

Electronic Theses and Dissertations

Ambiguous language haunts countless fields of human inquiry. The solution to its confounding nature has repeatedly been to reduce language to its face-value, launching an endless search for the right meaning. This paper aims to examine two thinkers who reveal language to be a more complicated matter. Paul Ricoeur and Moses Maimonides demonstrate the importance of language’s complexity through close examinations of metaphor. While we find different understandings of metaphor, reflecting different metaphysics within each author’s study, both Ricoeur and Maimonides contribute to the notion that language’s complexity is not to be eliminated through literal readings, but engaged to open …

Certification-Driven Testing Of Safety-Critical Systems, Aiman S. Gannous

Electronic Theses and Dissertations

Safety-critical systems are those systems that when they fail they could cause loss of life or significant physical damages. Since software now is an essential component of these types of systems, failures caused by software faults could come from flaws in the software development life-cycle. As a result, challenges unfold in two directions. First, in verifying that the software will not put the system in an unsafe state, and identifying external failures and mitigate them properly. Second, in providing sufficient evidence for an efficient safety certification process. In this study, we propose an approach for testing safety-critical systems called Model-Combinatorial …

Facial Action Unit Detection With Deep Convolutional Neural Networks, Siddhesh Padwal

Electronic Theses and Dissertations

The facial features are the most important tool to understand an individual's state of mind. Automated recognition of facial expressions and particularly Facial Action Units defined by Facial Action Coding System (FACS) is challenging research problem in the field of computer vision and machine learning. Researchers are working on deep learning algorithms to improve state of the art in the area. Automated recognition of facial action units has man applications ranging from developmental psychology to human robot interface design where companies are using this technology to improve their consumer devices (like unlocking phone) and for entertainment like FaceApp. Recent studies …

Aggregated Der Management In Advanced Distribution Grids, Mohsen Mahoor

Electronic Theses and Dissertations

Evolution of modern power systems are more distinct in distribution grids, where the growing integration of microgrids as well as distributed energy resources (DERs), including renewable energy resources, electric vehicles (EVs), and energy storage, poses new challenges and opportunities to grid management and operation. Rapid growth of distribution automation as well as equipment monitoring technologies in the distribution grids further offer new opportunities for distribution asset management. The idea of aggregated DERs is proposed as a remedy to streamline management and operation of advanced distribution grids, as discussed under three subjects in this dissertation. The first subject matter focuses on …

Early Childhood Educator Knowledge: An Exploratory Study Regarding Giftedness And Students Of Color, Stephanie A. Peralta

Electronic Theses and Dissertations

The purpose of this study was to examine general early childhood educator knowledge and perceptions of curricula relevant for early childhood gifted students of color. The research questions that guided the study were the following: How does preschool through second grade curricula support or impede academic success for gifted students of color? How does preschool through second grade curricula support or impede social emotional learning for gifted students of color? What are the perspectives of educators regarding inclusive practices including Critical Race Theory, within a preschool through second grade gifted curricula?

In reviewing the literature and national data concerning representation …

An Economic Analysis Of Cyber Warfare Governance Models, Kevin M. Kelleher

Electronic Theses and Dissertations

Allusions to death delivered by bits and bytes have been in vogue since the Reagan administration. Yet, as the internet and its connected devices have since proliferated, cyber violence remains far more fiction than fact. Nevertheless, prominent U.S. officials have all but assured the eventuality of a devastating attack. In anticipation, political, legal, and industry experts are now seeking to codify and inculcate international norms to govern acts of war prosecuted via cyberspace. Two of the most prominent governance models to emerge are the Tallinn Manual and Microsoft’s Digital Geneva Convention. The driving thesis of this research argues that within …

Retaining Gifted Individuals For The Sustainability Of Rural Communities, Jessie B. Matthews

Electronic Theses and Dissertations

Retaining Gifted Individuals for the Sustainability of Rural Communities examined the supports and barriers to young gifted adults’ choices regarding living in rural communities. The narrative methodology revealed the perceptions of remote rural community members through single, face-to-face interviews to understand the challenges and opportunities young gifted individuals encounter. Through community member interviews, participants echoed sentiments indicating supports, barriers, and the power of place play a significant role in gifted individuals’ desire to remain in their local community. The findings suggested through celebrating place, engagement in the local community, and encouragement to solve local problems, gifted individuals will engage in …

A Spectropolarimetric Study Of Southern Wr + O Binaries, Andrew G. Fullard

Electronic Theses and Dissertations

The classical Wolf-Rayet (WR) state is the evolved stage of a massive star, post main-sequence. They are characterized by their strong emission line spectra and stellar winds that are often more than 10 times denser than that of their progenitor O-type stars, which have mass loss rates of 10^-6 M_Θyr^-1. The evolution of WR stars and their connection to specific types of supernovae (SNe) is an open question. Current theory suggests that rapidly rotating massive stars may be the progenitors of SNe that produce long-duration gamma-ray bursts. The interaction between WR stars and their companion …

“Dialogical Offense:” A Postcolonial Womanist Deconstruction Of The Colonial Experience Of African American Women Through U.S. Institutional Apparatus Known As Criminal Justice Policy, April Michelle Woodson

Electronic Theses and Dissertations

The Black female experience in the United States is a colonized existence. This project’s analysis is specific to the North American U.S. geographic space and is not a diasporic project. Black women suffered from the greatest increase in the percentage of inmates incarcerated for drug offenses in the 1980’s and 1990’s which is the period of criminal justice policy formation and implementation on which this project is focused.

This project is uniquely situated in the overlap between womanist ethics and postcolonial feminist imagination and extends scholarship in both discourses by showing that there is an interwoven line between the colonial-to-contemporary …