Digital Commons Network^™

Uniting African Philosophy With Traditional African Dance Rituals To Help Heal Mental Health Symptoms From The Impact Of The African Diaspora, Brittnea Jones

Dissertations

The mental health challenges of members of the African diaspora have been a worldwide occurrence for centuries, initially beginning with the transatlantic slave trade. Africans were scattered abroad to different countries and subjected to the severe psychological impact of enslavement. Despite the considerable financial systemic pressure of profit in the slave trade, it caused significant harm to the enslaved Africans and their descendants by erasing Africa's memory and their healing traditions from the hearts and minds of the population. Severe mental health symptoms can arise from oppression and the impact of the African diaspora. This dispersion has left many African …

Diagnostics Of Dementia From Structural And Functional Markers Of Brain Atrophy With Machine Learning, Tetiana Habuza

Dissertations

Dementia is a condition in which higher mental functions are disrupted. It currently affects an estimated 57 million people throughout the world. A dementia diagnosis is difficult since neither anatomical indicators nor functional testing is currently sufficiently sensitive or specific. There remains a long list of outstanding issues that must be addressed. First, multimodal diagnosis has yet to be introduced into the early stages of dementia screening. Second, there is no accurate instrument for predicting the progression of pre-dementia. Third, non-invasive testing cannot be used to provide differential diagnoses. By creating ML models of normal and accelerated brain aging, we …

Prevalence Of Lost Time Injuries And Fatalities Among Construction Workers In Al Ain, United Arab Emirates (Uae), Ghuwaya Humaid Alnuaimi

Dissertations

Migrants account for more than 80% of the total population of the United Arab Emirates (UAE). Few population-based data were available about the burden of lost time injuries (LTIs) and fatalities among migrant workers employed in the construction industry. The proposed study aimed to estimate the prevalence of LTIs and associated factors, and fatalities among construction workers in Al Ain, of Abu Dhabi Emirate in the UAE. A cross-sectional study design was used to estimate the prevalence of LTIs resulting in one or more than a day of sick leave in a random sample (n=1,626) of male construction workers in …

The Design, Synthesis, And Characterization Of Copper-Based Metal-Organic Frameworks For Their Investigation Against Cancer And Their Effect As Anti-Microbial Agents, Sandy Elmehrath

Dissertations

A wide range of nanomaterials have been developed for biomedical applications, such as drug delivery, biomedical imaging, and sensors. Nanomaterials can include nanoparticles (NPs) and nanofibers with various dimensions that are both natural and synthetic. A successful nanomaterial, for use in biological applications, is characterized by its biocompatibility, biodegradability, intrinsic high surfaces area, high interconnected porosity, and functionality. These features were achieved with the development of metal-organic framework (MOF) nanostructures. MOFs are assemblies of metal ions and organic linkers that are built into different geometries and can exist in all dimensions (up to 3-D). The choice of linkers with well-defined …

Mixture Of Functional Graphical Models, Qihai Liu

Dissertations

With the development of data collection technologies that use powerful monitoring devices and computational tools, many scientific fields are now obtaining more detailed and more complicatedly structured data, e.g., functional data. This leads to increasing challenges of extracting information from the large complex data. Making use of these data to gain insight into complex phenomena requires characterizing the relationships among a large number of functional variables. Functional data analysis (FDA) is a rapidly developing area of statistics for data which can be naturally viewed as a smooth curve or function. It is a method that changes the frame of data …

Analysis Of The Zebrafish Olfactory System Using Immunohistochemistry And Enhanced Techniques Of Desorption Electrospray Ionization Mass Spectrometry (Desi-Ms), Tara Lynn Maser

Dissertations

Desorption electrospray ionization (DESI-MS) is an ambient ionization technique where the sample is analyzed directly from a surface with very minimal sample preparation under ambient conditions and follows ESI-like ionization mechanisms. DESI-MS has proven powerful in analyzing or imaging lipids and other small molecules directly from biological samples and even allows for subsequent histological staining and analyses. However, DESI-MS is less widely used for protein analysis due to a lack of sensitivity and the complex diversity of proteins in biological samples.

A major goal of this research has been to obtain new neurobiological knowledge by combining histology and mass spectrometry …

From Young To Old: The Effects Of Sedentary-Aging And Exercise Interventions On Structural Plasticity Of Lumbar Motor Neurons, Nmj, And Glial Cell Line-Derived Neurotrophic Factor Expression, Alberto Felipe Cintron-Colon

Dissertations

Neuromuscular weakness has been associated with age progression. A possible reason is a disconnection between muscle and neuron, causing components from both the central and peripheral nervous systems to deteriorate. Exercise, however, has beneficial effects for both muscle and nervous tissue, inducing neuroprotection. Neurotrophic factors are powerful regulators of neuronal maintenance and synaptic strength. Glial cell line-derived neurotrophic factor (GDNF) is a neurotrophic factor that has been shown to be a potent survival factor for somatic motor neurons that innervate skeletal muscle.

This study aims to evaluate changes in structural plasticity of motor neurons in the lumbar spinal cord and …

The Experiences Of Undergraduate Saudi Students In The Stem Trajectory: A Closer Look At Major Choice And Persistence Intentions, Manal Almalki

Dissertations

STEM fields (Science, Technology, Engineering, and Mathematics) are a key source of economic progress in many countries. As the Kingdom of Saudi Arabia works toward an innovative and knowledgeable economy, more qualified national professionals in STEM are needed. Nevertheless, the problem of STEM attrition is still insufficiently explored in Saudi Arabia, which may indicate a gap between skills of the Saudi workforce and the country’s need for economic development. Therefore, this study attempts to provide more information about the STEM trajectory in Saudi Arabia, underline possible attrition points that require more attention, deliver a better understanding of the factors that …

Factors In Graduate Student Resilience And Intention To Persist During Doctoral Study, Amber Mosley

Dissertations

Attrition is a major problem for the doctoral education system and in particular for underrepresented groups. Research has proposed several reasons for students dropping out that include both personal and programmatic variables. A review of the literature identified several factors that overlap in the research on attrition, resilience, and intention to persist however, there have also been varied results across studies and very few studies focused specifically on doctoral students. Doctoral education can be considered in three phases of the education process, each with its own stresses and challenges. Factors and variables that could be the most helpful for universities …

Development Of Flexible Hybrid Electronics For Sterilization And Structural Health Monitoring Applications, Arnesh Kumar Bose

Dissertations

No abstract provided.

Optimizing Speed Profiles For Sustainable Train Operation With Wayside Energy Storage Systems, Leon A. Allen

Dissertations

Large hauling capability and low rolling resistance has put rail transit at the forefront of mass transportation mode sustainability in terms of congestion mitigation and energy conservation. As such, rail vehicles are one of the least energy-intensive modes of transportation and least environmentally polluting. Despite, these positives, improper driving habits and wastage of the braking energy through dissipation in braking resistors result in unnecessary consumption, extra costs to the operator and increased atmospheric greenhouse gas emissions.

This study presents an intelligent method for the optimization of the number and locations of wayside energy storage system (WESS) units that maximize the …

Nondestructive Evaluation Of 3d Printed, Extruded, And Natural Polymer Structures Using Terahertz Spectroscopy And Imaging, Alexander T. Clark

Dissertations

Terahertz (THz) spectroscopy and imaging are considered for the nondestructive evaluation (NDE) of various three-dimensional (3D) printed, extruded, and natural polymer structures. THz radiation is the prime candidate for many NDE challenges due to the added benefits of safety, increased contrast and depth resolution, and optical characteristic visualization when compared to other techniques. THz imaging, using a wide bandwidth pulse-based system, can evaluate the external and internal structure of most nonconductive and nonpolar materials without any permanent effects. NDE images can be created based on THz pulse attributes or a material’s spectroscopic characteristics such as refractive index, attenuation coefficient, or …

Local Learning Algorithms For Stochastic Spiking Neural Networks, Bleema Rosenfeld

Dissertations

This dissertation focuses on the development of machine learning algorithms for spiking neural networks, with an emphasis on local three-factor learning rules that are in keeping with the constraints imposed by current neuromorphic hardware. Spiking neural networks (SNNs) are an alternative to artificial neural networks (ANNs) that follow a similar graphical structure but use a processing paradigm more closely modeled after the biological brain in an effort to harness its low power processing capability. SNNs use an event based processing scheme which leads to significant power savings when implemented in dedicated neuromorphic hardware such as Intel’s Loihi chip.

This work …

Understanding The Interfacial Processes Of Reactive Nanobubbles Toward Agricultural Applications, Xiaonan Shi

Dissertations

There is a growing interest in nanobubble (NB) technology because of its diverse applications (e.g., detergent-free cleaning, water aeration, ultra-sound imaging and intracellular drug delivery, and mineral processing). NBs have a higher efficiency of mass transfer compared to bulk scale bubbles due to the high specific surface areas. The high specific surface also facilitates physical adsorption and chemical reactions in the gas liquid interface. Furthermore, the collapse of NBs creates shock waves and the formation of hydroxyl radicals (OH).

However, it remains elusive why or how NBs are stabilized in water and particularly, the states of internal pressures of NBs …

Assessing Structural And Functional Brain Alterations And Work-Related Fatigue In Non-Hyposmic And Hyposmic Covid-19 Survivors, Rakibul Hafiz

Dissertations

In the year 2019, life began to change at the advent of a global pandemic caused by the novel coronavirus. Mask mandates and mass vaccinations have mitigated the effects significantly, yet cases keep rising with new variants, especially, in densely populated countries, like India. Recent neuroimaging evidence shows the virus can attack the central nervous system (CNS). However, exactly which brain regions undergo structural and functional changes remain largely unknown. Many patients experience 'loss of/reduced sense of smell' (i.e., hyposmic) and an alarming number of survivors develop persistent symptoms ('long-COVID') for several months after initial infection. Fatigue is the most …

Repeated Low-Level Blast Induces Chronic Neuroinflammation And Neurobehavioral Changes In Rat Models, Arun Reddy Ravula

Dissertations

Blast-induced neurotrauma (bTBI) is a signature medical concern for military personnel when they are exposed to explosions in active combat zones. However, soldiers as well as law enforcement personnel are also repeatedly exposed to low-level blasts during training sessions with heavy weaponries as part of combat readiness. Service personnel who sustain brain injuries from repeated low-level blasts (rLLBs) do not display overt pathological symptoms immediately but rather develop cognitive impairments, attention deficits, anxiety, and sleep disturbances over time. An improved rat model of rLLB was developed in this thesis by applying controlled low-level blast pressures (10 psi) repeated five times …

Graph Enabled Cross-Domain Knowledge Transfer, Shibo Yao

Dissertations

The world has never been more connected, led by the information technology revolution in the past decades that has fundamentally changed the way people interact with each other using social networks. Consequently, enormous human activity data are collected from the business world and machine learning techniques are widely adopted to aid our decision processes. Despite of the success of machine learning in various application scenarios, there are still many questions that need to be well answered, such as optimizing machine learning outcomes when desired knowledge cannot be extracted from the available data. This naturally drives us to ponder if one …

Development Of Novel Mass Spectrometric Methods For Reaction Screening, Oligosaccharide Detection, And Nitrosamine Quantitation, Qi Wang

Dissertations

Benefitting from its high detection sensitivity and specificity, mass spectrometry (MS) has become a powerful technique in academia and industry. The aim of this dissertation study is to develop new mass spectrometric methods for organic reaction screening, detection of oligosaccharide/glycan in complex matrices, and nitrosamine absolute quantitation.

First, an electrochemistry/mass spectrometry (EC/MS) platform is built to generate an N-cyclopropylaniline radical cation electrochemically and to monitor its reactivity toward alkenes, which leads to the discovery of a new redox neutral reaction of intermolecular [3 + 2] annulation of N-cyclopropylanilines and alkenes. Net redox neutral electrosynthesis is quite rare in synthetic organic …

The Impact Of Material And Environmental Properties On The Ettringite - Metaettringite Thermochemical Reaction, Aaron Strand

Dissertations

The use of energy is an essential need for people, with demand constantly increasing due to an increasing population and an increase in living and comfort standards. Since 1965, world energy consumption has quadrupled. During peak utilization, the strain on the grid infrastructure can be immense. As energy demand fluctuates during different times of the day and year, the energy production needs to scale accordingly This creates inefficiencies within the system such as over building generation capacity or losses from start up or ramping up production. This can be alleviated through load leveling where excess energy generated during low demand …

Bodipy-Based Light-Responsive Materials, Zhaoxiong Wan

Dissertations

The energy required for life on our planet is provided by light. In science, light is an important and powerful tool for measuring and modifying substances. For example, under the effect of illumination, light-responsive materials can change their physical and chemical properties. Photochemistry is a branch of research to study the effects of light irradiation on chemical structures and reactions. Some photochemical changes could lead to chemical bond dissociation (such as in photosynthesis) and structure isomerization (such as in the retina). Photochemistry has a strong relationship with human lives and it is essential in many ways. Among photophysics, fluorescence emission …

Design Of Self-Assembled Peptides For Wound Healing, Ka-Kyung Kim

Dissertations

According to the CDC, 15% of diabetic patients develop diabetic foot ulcers (DFU) and approximately 170,000 patients undergo non-traumatic amputation annually. DFU is a major complication of diabetes caused by non-healing full-thickness wounds through the dermis. The current treatments include blood sugar control, frequent debridement, offloading, moist wound care, infection treatment, and amputation. To achieve wound closure of DFU, appropriate wound care and antibiotic therapy are essential. Topical regimens include hydrocolloids, alginates, foam, silver-impregnated dressings, and hydrogels. Wound healing is a complex and dynamic interplay between the immune system, keratinocytes, and dermal cells (in case of cutaneous wound). Angiogenesis has …

Core Principles Of Early Childhood Education Through The Lens Of California's Transitional Kindergarten Teachers And Administrators, Furwa T. Rizvi

Dissertations

California's public-school system recently introduced another grade level, Transitional Kindergarten, as an opportunity to offer universal access to early education for all 4-year-olds. Elementary school teachers and administrators must be well prepared to support and education these young children. This dissertation focuses on four key principles to ensure high-quality learning: Developmentally Appropriate Practices, Social and Emotional Learning, Dual Language Learning, and Early Intervention. To gain a better understanding of teacher and administrator perspectives on these core principles of early childhood education, a comprehensive survey was administered online, with a total of # teacher and # administrator respondents. Results indicate that …

Remifentanil Patient Controlled Analgesia Use In Laboring Women: A Feasibility And Acceptability Study, Joshua Carr

Dissertations

Background/Purpose: Interest in remifentanil patient controlled analgesia (RPCA) as a treatment for labor pain has increased due to its unique pharmacodynamics and effectiveness on pain control among parturients. Despite its promise, RPCA remains infrequently used in the US. The purpose of this study was to 1) examine the implementation and acceptability of a new RPCA protocol in the labor and delivery ward of a mid-sized hospital, and 2) identify the attitudes and beliefs of healthcare workers in a real-world clinical setting.

Theoretical/Conceptual Framework: The holistic nature of Comfort Theory can account for the proposed mechanisms contributing to the …

The Hustler Award Program, Julia N. Biayi

Dissertations

Problem: Hospitalized adults are at increased risk of falling due to multiple aspects, including but not limited to changes in health status, the environment, pain, weakness, confusion, and prolonged immobility. This project focused on the question: How will the utilization of the Hustler Award Program decrease fall rates in an adult inpatient medical-surgical unit?

Method: A prospective quality improvement pilot study focused on a 24-bed medical-surgical unit in a Midwest, 487-bed metropolitan-based facility.

Results: The results captured are for the evaluation period occurring from September through November 2021. The staff responded to 52-bed exit alarms, which yielded a response rate …

An Investigation On The Impact Of Intestinal Oxygen Availability On Survival And Regulation Of Virulence In Listeria Monocytogenes, Damayanti Chakravarty

Dissertations

The deadly foodborne pathogen Listeria monocytogenes is a gram positive facultative anaerobic bacterium. It is the third leading cause of death from food-borne illnesses. Once ingested, it encounters various stressors in the gastrointestinal (GI) tract, including acidic pH, bile, and alterations in oxygen availability. Various studies have been done regarding the pathogen’s survival mechanism against acid and bile. Since the lower parts of the GI tract are anaerobic, it is imperative to investigate how physiologically relevant anaerobic conditions impact L. monocytogenes’s survival. Transcriptomic analysis of L. monocytogenes under conditions mimicking the GI tract was performed. A large number of genes …

A Study Of The Challenges Faced By Students Who Identify As Refugees Who Have Experienced Interrupted Education And Trauma, Merdin Mohammed

Dissertations

Every year, more than 65 million people are displaced worldwide. These refugees, asylum seekers, and internally displaced people flee conflict, poverty, environmental degradation, and other conditions forcing them from their homes. In 2020, the number of individuals internally displaced reached 82.4 million; of this total, 26.4 million were refugees. In 2021, of the 11,411 refugees resettled in the United States, 8.6% resettled in California. When refugee students come to San Diego, the majority resettle in the neighborhoods of City Heights and El Cajon. These refugee children have lived on the road or in refugee camps, faced consistent interruptions to a …

Helmets Off: An Exploratory Investigation Into The Philanthropic Activity Of Black Nfl Players, Eugena Anderson

Dissertations

The term philanthropist typically conjures up images of older, wealthy White males. When taking account of a more diverse population, the term generosity provides a more inclusive framework to understanding the experiences of those marginalized from the study and practice of philanthropy. Using an interpretative phenomenological analysis (IPA) approach, this qualitative investigation explored one of several groups of individuals engaging in acts of generosity and brought the Black athlete experience into academic and philanthropic conversations. This research provided knowledge from real-life experiences of current and former Black NFL Players (BNPs) to inform various stakeholders who seek to support their activities. …

Improving The Retention Of United States (U.S.) Government Science, Technology, Engineering, And Mathematics (Stem) Employees, Jeffrey Myers

Dissertations

The U.S. government workforce has been consistently shrinking since a peak in the 1990s. At the same time, the need for technologically-savvy government workers has dramatically risen in this same period. This divergence in the demand for science, technology, engineering, and mathematics (STEM) employees challenges government leaders to retain these highly demanded workers in the public sector.

Decades of psychological research across many industries has investigated what motivates workers and how best to incentivize them to increase productivity. Maslow and Herzberg, among others, theorized that adult workers have both intrinsic and extrinsic needs that drive their behaviors and resultant productivity. …

Rethinking Binge Eating Disorder: Is Resource Depletion The Missing Link?, Laura Fewell

Dissertations

Binge eating disorder (BED), the most prevalent of the eating disorders, is associated with significant mental health impairments, high healthcare costs and utilization, and increased mortality. Yet little is known about the mechanisms involved in binge eating, and existing BED theories are incomplete. Scholars have recently suggested that resource depletion, or the state of reduced self-regulation abilities, may apply to BED, but no identified studies have experimentally examined this relationship. The purpose of the current study was to examine the role of resource depletion in binge eating behaviors. Ego anxiety, discomfort anxiety, and dietary restraint were also examined as potential …

A Mixed-Methods Study Examining The Difference Between Closed Captioning And Lexile Levels, Jim Pruitt

Dissertations

This experimental mixed-methods study explores what happens to student Lexile scores when they use closed captioning. Since the emergence of closed captioning tools in the 1980s, closed captioning has become more mainstream and easier to access today than at any other time in history (Rickelman et al., 1991). Thus, it is through harnessing this technology and bringing it into the classroom setting that the researcher of this study hopes to provide new approaches for educators that want to improve their student Lexile levels, while also incorporating the SAMR model within our increasingly technologically-focused classrooms (Crompton & Burke, 2018).

The quantitative …