Digital Commons Network^™

Epigenetic Modifications In Metabolic Syndrome: Identification And Evaluation Of Early Indicators Using A Rodent Model System, Ashok Daniel Pragasam

Dissertations

It is increasingly realized that mechanisms of developmental plasticity rather than pathology independently facilitate the size of developing embryos during early development. Changes in the early developmental environment alter the metabolic traits resulting in diseases, including metabolic syndrome, including type 2 diabetes and obesity in adulthood. Molecular and epidemiological studies have documented an association between Lower Birth Weight (LBW) and increased risk of developing metabolic syndrome. Henceforth, using birth weight as a marker, two groups of normal birth weight range rat pups, Lower Birth Weight (LBW, 5th to 25th percentile) and Average Birth Weight (ABW, 50th to 75th percentile) as …

Faith News In The Digital Age: New Muslim And Non-Muslim Residents Seeking Islamic Information In Dubai, United Arab Emirates, Urwa Tariq

Dissertations

When non-Muslims become immersed in an Islamic way of life—a common occurrence in the UAE, a Muslim country where the overwhelming majority of the resident population is foreign-born—some become interested in learning more about the Islamic faith. This interest is also evident among new converts to Islam from other countries when they reside in the UAE. Little is known about how information about Islam is disseminated to non-Muslims and new Muslims in the UAE, how these expatriates search for the religious information they desire, and the challenges they encounter in their enquiries. This study applies the theory of the diffusion …

Intrusive Academic Advising Student-Athletes At A Division Iii University, Robert Holmes

Dissertations

Abstract

There are many factors that affect the graduation of collegiate student-athletes. Factors include student-athlete characteristics, academic advising, engagement, and relationships. These factors affect student-athlete retention at the university. Student-athletes must navigate their academic and athletic success with assistance from academic advisors and other university support systems. The ability of the student-athlete and the academic advisor to communicate and cultivate a relationship that is built on regularly scheduled meetings, sharing of the student-athlete’s personal goals, suggestions for personal and professional improvement culminating in trust is paramount to the success of the student-athlete. This research focuses on the relationship between the …

Perceived Discrimination Within The Patient-Provider Relationship And Its Impact On Help-Seeking Behaviors, Lechey S. Hibbler

Dissertations

Racial and ethnic minorities have faced discrimination for hundreds of years. When patients experience discrimination in healthcare settings, help-seeking behaviors decrease. Many patients choose to refrain from seeking treatment until their psychological or physical health issues are unmanageable, often resulting in acute visits to the emergency department. Patients that have experienced previous discriminatory encounters with health care providers are more likely to choose not to seek help for physical or mental health concerns, resulting in overall poorer physical health and mental health outcomes. With the use of critical evaluation of previous studies, this paper has demonstrated that perceived discrimination negatively …

The Impact Of The Transgenerational Cycle Of Prison On Attachment Among Black Individuals, Meagan Scott

Dissertations

This empirical study assessed the impact of incarceration on an individual’s attachment style and explored protective factors that moderate these overall outcomes. The study sought to answer the following questions: (a) Are there differences related to the gender of Black participants and the gender of their incarcerated parent? and (b) Will affective expression and/or sense of community serve as protective factors and mediate the attachment style of Black individuals who have been incarcerated? The sample consisted of 98 adults (45 of whom indicated being a part of the transgenerational cycle of prison) ranging from 18 to 68 years old. Participants …

Examining Therapist Experience With Resistant Clients, Elisha Ibebunjo

Dissertations

This qualitative phenomenological study involved an exploration of the lived experiences of 10 licensed therapists with substantial encounters with resistant clients. The phenomenon under investigation is relevant to those working in the mental health industry because resistance in psychotherapy is a common challenge. It is not a matter of if a therapist will encounter resistant clients, it is a matter of when. The goal in this qualitative study was to discover how the 10 participants, all of whom were experienced therapists, navigated through resistance; to identify the methods and procedures they used; and to compile their successful approaches and methods …

Automated Algorithmic Machine-To-Machine Negotiation For Lane Changes Performed By Driverless Vehicles At The Edge Of The Internet Of Things, Ellie Lovellette

Dissertations

This dissertation creates and examines algorithmic models for automated machine-to-machine negotiation in localized multi-agent systems at the edge of the Internet of Things. It provides an implementation of two such models for unsupervised resource allocation for the application domain of autonomous vehicle traffic as it pertains to lane changing and speed setting selection. The first part concerns negotiation via abstract argumentation. A general model for the arbitration of conflict based on abstract argumentation is outlined and then applied to a scenario where autonomous vehicles on a multi-lane highway use expert systems in consultation with private objectives to form arguments and …

The Making Of The Man’S Man: Stardom And The Cultural Politics Of Neoliberalism In Hindutva India, Soumik Pal

Dissertations

In this dissertation, I trace the contours of state control and capital in India, starting from the 1970s and see how the state’s increasingly centralizing tendencies and authoritarianism, in the service of capital, creates cultures of violence, fatalism, desperation, and ultimately, even more desire for authoritarianism. I study male stardom in Bombay cinema, beginning withAmitabh Bachchan (who was the reigning star in the 1970s and 80s), and following up with Shah Rukh Khan and Salman Khan (who have been successful stars from the early 90s), to understand how changing subjectivities, responding to changing socio-economic reality, were formulated and expressed through …

Real-Time Congestion Management In Modern Distribution Systems, Meisam Ansari

Dissertations

In this research, the problem of real-time congestion management in a modern distribution system with massive active elements such as electric vehicles (EVs), distributed energy resources (DERs), and demand response (DR) is investigated. A novel hierarchical operation and management framework is proposed that can take advantage of the demand side contribution to manage the real-time congestion. There are five main steps in this framework as 1) the aggregators send their demand to the microgrid operators (MGOs), 2) the MGOs send their demand to the distribution system operator (DSO), 3) the DSO detects the congestions and calls the engaged MGOs to …

Resource Management And Application Customization For Hardware Accelerated Systems, Zois Gerasimos Tasoulas

Dissertations

Computational demands are continuously increasing, driven by the growing resource demands of applications. At the era of big-data, big-scale applications, and real-time applications, there is an enormous need for quick processing of big amounts of data. To meet these demands, computer systems have shifted towards multi-core solutions. Technology scaling has allowed the incorporation of even larger numbers of transistors and cores into chips. Nevertheless, area constrains, power consumption limitations, and thermal dissipation limit the ability to design and sustain ever increasing chips. To overpassthese limitations, system designers have turned towards the usage of hardware accelerators. These accelerators can take the …

How Are Women Farmers "Doing" And "Undoing" Gender?: An Exploration Of Women's Gender Practices In Farming, Rebecca J. Tuxhorn

Dissertations

The number of women farmers in the US continues to grow even at a time when the number of men farmers is decreasing. But even as women are experiencing growing representation in this historically men-dominated occupation, they are more likely to operate smaller farm operations, own less land, and earn less than men farmers. Additionally, there are barriers to accessing the full farmer identity due to their invisibility in the largely patriarchal structure of agriculture. In this dissertation, I endeavor to learn more about how women farmers navigate the gendered structure of farming, including barriers to accessing occupation-related resources and …

Optical Engineering Of Iii-Nitride Nanowire Light-Emitting Diodes And Applications, Ha Quoc Thang Bui

Dissertations

Applications of III-nitride nanowires are intensively explored in different emerging technologies including light-emitting diodes (LEDs), laser diodes, photodiodes, biosensors, and solar cells. The synthesis of the III-nitride nanowires by molecular beam epitaxy (MBE) is investigated with significant achievements. III-nitride nanowires can be grown on dissimilar substrates i.e., silicon with nearly dislocation free due to the effective strain relaxation. III-nitride nanowires, therefore, are perfectly suited for high performance light emitters for cost-effective fabrication of the advanced photonic-electronic integrated platforms. This dissertation addresses the design, fabrication, and characterization of III-nitride nanowire full-color micro-LED (µLED) on silicon substrates for µLED display technologies, high-efficient …

Reconstituting The Cyanobacterial Circadian Clock In Vitro, Pyong Hwa Kim

Dissertations

Cyanobacteria are photosynthetic organisms that are known to be responsible for oxygenating Earth’s early atmosphere. Having evolved to ensure optimal survival in the periodic light/dark cycle on this planet, their genetic codes are packed with various tools, including a sophisticated biological timekeeping system. Among the cyanobacteria is Synechococcus elongatus PCC 7942, the simplest clock-harboring organism with a powerful genetic tool that enabled the identification of its intricate timekeeping mechanism. The three central oscillator proteins—KaiA, KaiB, and KaiC—drive the 24 h cyclic gene expression rhythm of cyanobacteria, and the "ticking" of the oscillator can be reconstituted inside a test tube just …

Radio Diagnostics Of Particles And Plasma In The Solar Corona, Sherry Chhabra

Dissertations

Radio diagnostics, in addition to their capabilities in exploring intense, impulsive bursts, also provide a high sensitivity to much weaker events, which may not show any substantial signature in other wavelengths.

The initial case study examines a complex event consisting of multiple radio sources/bursts associated with a fast coronal mass ejection (CME) and an M 2.1 class solar flare (SOL2015-09-20). ‘First-light’ data from the Owens Valley Radio Observatory–Long Wavelength Array is put in context with observations from Large Angle and Spectrometric Coronagraph onboard the Solar and Heliospheric Observatory, along with the WAVES radio spectrograph onboard WIND, the Expanded Owens Valley …

First-Principles Density Functional Theory Studies On Perovskite Materials, Aneer Lamichhane

Dissertations

Perovskites are a family of materials with a diverse combination of different elements. As a consequence, they exhibit numerous functionalities such as pyroelectric, piezoelectric, ferroelectric, and ferromagnetic with applications in photovoltaic cells, LEDs, superconductivity, colossal magneto-resistance, and topological insulators. After 2009, perovskites have gained notoriety as suitable materials for solar cells and alternative candidates to silicon-based conventional solar cells. Generally, oxide perovskites exhibit good dielectric properties, halide perovskites display good photonic qualities, and chalcogenide perovskites are used in applications in solid-state lighting, sensing, and energy harvesting. In this dissertation, various types of perovskites ranging from oxide to halide are investigated …

Intelligent And Secure Fog-Aided Internet Of Drones, Jingjing Yao

Dissertations

Internet of drones (IoD), which utilize drones as Internet of Things (IoT) devices, deploys several drones in the air to collect ground information and send them to the IoD gateway for further processing. Computing tasks are usually offloaded to the cloud data center for intensive processing. However, many IoD applications require real-time processing and event response (e.g., disaster response and virtual reality applications). Hence, data processing by the remote cloud may not satisfy the strict latency requirement. Fog computing attaches fog nodes, which are equipped with computing, storage and networking resources, to IoD gateways to assume a substantial amount of …

Impact Of User Traversal On Performance Of Stem Learners In Immersive Virtual Environments, Eric W. Nersesian

Dissertations

The emerging technologies of augmented and virtual reality (AR/VR) may have vast implications to societal communication and representation of information. AR/VR computer interfaces are unique in that they may be placed spatially around the user in three-dimensional (3D) space; this affords new methods of both presentation and user interaction with the target information.

This may be especially impactful in the education of science, technology, engineering, and mathematics (STEM) professionals. Prior research has shown that simulations and visualizations improve the performance of STEM learners compared to live instruction and textbook reading. Yet, research into AR/VR as a learning environment for widespread …

Deep Learning On Image Forensics And Anti-Forensics, Zhangyi Shen

Dissertations

Image forensics protect the authenticity and integrity of digital images. On the contrary, as the countermeasures of digital forensics, anti-forensics is applied to expose the vulnerability of forensics tools. Consequently, forensics researchers could develop forensics tools against possible new attacks. This dissertation investigation demonstrates two image forensics methods based on convolutional neural network (CNN) and two image anti-forensics methods based on generative adversarial network (GAN).

Detecting unsharp masking (USM) sharpened image is the first study in this dissertation. A CNN architecture comprises four convolutional layers and a classification module is proposed to discriminate sharpened images and unsharpened images. The results …

Electric Field Induced Self-Assembly Of Mesoscale Structured Materials And Smart Fluids, Suchandra Das

Dissertations

This dissertation aims to study the forces that drive self-assembly in binary mixtures of particles suspended in liquids and on fluid-liquid interfaces when they are subjected to a uniform electric or magnetic field. Three fluid-particle systems are investigated experimentally and theoretically : (i) Suspensions of dielectric particles in dielectric liquids; (ii) Suspensions of ferromagnetic and diamagnetic particles in ferrofluids; and (iii) Dielectric particles on dielectric fluid-liquid interfaces. The results of these studies are then used to estimate the parameter values needed to assemble materials with desired mesoscale microstructures.

The first fluid-particle system studied is an electrorheological (ER) fluid formed using …

Service Quality Assessment And Improvement Methods And Tools, Kevin M. Moriarty

Dissertations

The nucleus of this research concept and system is being applied to turret lathe and milling machine Computer Numerical Control (CNC) tool systems. The research has a generic application to the service of broad array of sophisticated computer controlled / integrated machines, devices / equipment such as industrial robotics, medical equipment, surgical robots, and similar types of engineered system. Quality design review for quality service systems is a unique concept. Standard product service systems are qualitative and subjective in nature. The quantitative system identifies Key Predictive Attributes (KPAs) and applies quantitative methods to these attributes to develop a systematic process …

Private Sound Environments In Public Space: Use Of Headphones In Public Parks And Public Transit, Chathurthi S. De Silva

Dissertations

The use of headphones is now so commonplace that it is almost second nature for many people to use them. Not only do these people use headphones all the time, but they use them nearly everywhere, including in urban public spaces. In using headphones, people create their own “private sound environments” in public space. This phenomenon merits attention from researchers since the creation of private sound environments may well alter people’s experiences of public space.

This study answers five research questions about the use of headphones in parks and on transit: why people use them, when they begin using headphones …

Towards Improving The Security Of The Software Supply Chain, Hammad Afzali

Dissertations

A software supply chain comprises a series of steps performed to develop and distribute a software product. History has shown that each of these steps is vulnerable to attacks that can have serious repercussions and can affect many users at once. To address the attacks against the software supply chain, end users must be provided with verifiable guarantees about the individual steps of the chain and with assurances that the steps are securely chained together.

In this dissertation, the security of several individual steps in the software supply chain is enhanced. The first step of the chain, managing the source …

Improving Multi-Threaded Qos In Clouds, Weiwei Jia

Dissertations

Multi-threading and resource sharing are pervasive and critical in clouds and data-centers. In order to ease management, save energy and improve resource utilization, multi-threaded applications from different tenants are often encapsulated in virtual machines (VMs) and consolidated on to the same servers. Unfortunately, despite much effort, it is still extremely challenging to maintain high quality of service (QoS) for multi-threaded applications of different tenants in clouds, and these applications often suffer severe performance degradation, poor scalability, unfair resource allocation, and so on.

The dissertation identifies the causes of the QoS problems and improves the QoS of multi-threaded execution with three …

Mechanisms Of Oscillations And Polyglot Entrainment In Neuronal And Circadian Models, Emel Khan

Dissertations

Entrainment is a type of synchronization in which the period of an endogenous oscillator matches the period of an external forcing signal and a stable phase relationship is maintained between them. Entrainment patterns are described in terms of the number of input oscillations (N) that are phase-locked to a number of output oscillations (M), referred to as N:M patterns. Arnold tongue diagrams are used to depict the regions of N:M entrainment patterns in the input period-amplitude parameter space. Although the entrainment of self-sustained oscillators by periodic forcing are well investigated is a well-studied problem, entrainment of damped oscillators has been …

Using Fnirs As An Objective Measure Of Susceptibility To Informational Masking, Min Zhang

Dissertations

Resolving complicated auditory scenes is crucial for daily communication where background sound is often present. However, most hearing aid (HA) and cochlear implant (CI) users have difficulties understanding speech when competing sound sources are present, resulting in reduced job opportunities and increased risk for social isolation. Perceptual interference from background sound is called auditory masking. At least two distinct masking phenomena exist, called energetic and informational masking (EM and IM).

In the first masking phenomenon, EM, target and masker energies coincide at the same time and frequency. Computational and physiological models of cochlear auditory processing can reliably predict listeners' performances …

Modeling And Analysis Of Intracellular Signaling Networks And Cellular Decisions, Mustafa Ozen

Dissertations

Developing molecular network analysis methods is important due to their applications on complex biological systems such as target discovery, development of drugs, discovering drug effects, and finding treatments for many complex diseases, e.g., cancer, autoimmune, and mental disorders. An example of analysis techniques is the fault diagnosis analysis, in which the purpose is to quantify how much vulnerable the entire network is to dysfunction of one or multiple molecules. Such analysis can be done after proper network models are implemented, trained, and tested against the experimental data. In this dissertation, a Boolean modeling framework is implemented and methods to train …

An Investigation Of Success Factors In A High School Algebra I Program, Sherri Kulpa

Dissertations

The purpose of this study was to investigate a high school Algebra I program through an examination of potential relationships among teachers’ beliefs about teaching and learning mathematics, teachers’ instructional styles, students’ academic self-concept in mathematics, and students’ mathematics achievement in an Algebra I course. While a significant amount of research has focused on individual components of the study (e.g., instructional practices, academic self-concept), little research has been done to identify potential relationships between factors. Additionally, much of the available research focused on the elementary level leaving a gap in understanding how various factors were related to the success of …

Political Styles And Strategies Used By Midsized Elementary School District Superintendents To Work With School Board Members, Christine Sinatra

Dissertations

Purpose: The purpose of this sequential explanatory mixed methods study was to identify the political styles of superintendents and school board members as perceived by superintendents. In addition, it was the purpose to identify and explain the political strategies superintendents use to work with the different political styles of school board members.

Methodology: This study used a mixed methods sequential explanatory research design to collect quantitative data through an electronic survey to identify and describe the political styles of each superintendent and their board members. An in-depth qualitative interview process further explored each superintendents’ lived experience with using different political …

How Does The Market View Share Repurchases: Five Possible Book Values In The Fama-French 3 Factor Model, Jaime Peters

Dissertations

Share repurchase activity has grown significantly over the past twenty years and has emerged as the most popular technique for returning cash to shareholders. Current U.S. generally accepted accounting principles treat share repurchases as a return of capital to shareholders, recording the repurchased shares at market prices and offsetting them against contributed capital accounts. This treatment reduces the recorded book value of the equity of companies. Of course, companies can reissue these shares to fulfill stock option contracts, as consideration in acquisitions, and/or in secondary offerings. These economically relevant uses of repurchased shares suggest that the market may treat share …

The Associations Of Chronic Stress, Social Support, Health Behaviors And Metabolic Syndrome Among Hispanic Women, Edna Esquer

Dissertations

The Associations of Chronic Stress, Social Support, Health Behaviors and Metabolic Syndrome Among Hispanic Women

Background: Metabolic syndrome (MetS) prevalence is 25% among Mexican American women 30 – 49 years of age, compared to 22% among non-Hispanic Whites in the United States. Little is known about the additional contributions of chronic stress, social support and health behaviors to the development of MetS among this population.

Purpose: Describe the associations between chronic stress, social support, and health behaviors and the presence of MetS in Hispanic women living in an underserved community.

Methods: A retrospective cohort study design. The Adult Treatment Panel …