Digital Commons Network^™

Key Internal Factors Affecting Safety Performance In The Aviation Industry, Yasser Salah Elyan

Dissertations

Continuously improving aviation safety and enhancing its performance at both the organizational and individual levels is always considered a high priority by the aviation industry in all sectors. In addition, governments and aviation regulatory authorities have put significant efforts into creating a safety culture with clear safety practices at all levels of the organization. Moreover, international aviation organizations and associations worldwide have established safety standards, guidelines, and management systems that are essential to ensure the successful implementation of safety practices. However, based on the reviewed literature and the researcher's knowledge in this area, there is a clear perception gap concerning …

Contextualizing The Emotive & Experiential Trajectories Of Arab Bilinguals In Higher Education: An Exploratory Sequential Mixed Method Study, Sabahet Bruncaj

Dissertations

Higher Education institutions in the UAE are increasingly adopting English as a Medium of Instruction. For native Arabic speakers, this educational practice has established a lingual impasse that relegates entry and serves as a signifier of ability. This study explores the experiential and emotional histories of conducting academic studying in a second language. The study is grounded in the theoretical framework of Emotions, whereby the exploration of affect and emotion-specifiers on bilinguals within the EMI in HE experiences and identified. The study applied an Exploratory Sequential Mixed method design led by Qualitative semi-structured interviews with Ph.D. students (n=11). This framework …

Gestational Diabetes Mellitus Screening, Diagnosis And Knowledge In The United Arab Emirates, Maryam Mohammed Bashir

Dissertations

Gestational diabetes mellitus (GDM) is a significant public health problem with short- and long-term consequences. If undiagnosed and untreated, it is associated with multiple adverse perinatal outcomes and future risk of developing type 2 diabetes mellitus (DM) and other cardiovascular diseases in affected mothers and children. In the United Arab Emirates (UAE), up to 1 in 4 pregnancies are affected by GDM. This PhD dissertation explores GDM screening, diagnosis, guideline use, and knowledge to provide a basis for primordial, primary, secondary, and tertiary levels of prevention in GDM care in the UAE. Three studies were conducted to achieve the PhD …

The Ecology And Evolution Of Species Rarity In Oaks (Quercus Spp.), Yingtong Wu

Dissertations

Rare species are susceptible to extinction due to ecological and genetic factors. Understanding the distribution, ecology, and evolution of rare species can provide useful information for effective conservation. To investigate species rarity, this dissertation focuses on a species-rich and ecologically diverse genus, Quercus (oaks). In Chapter 1, I aimed to understand how interactions between hosts and soil microbes contribute to habitat restriction in oak species. I performed a soil inoculum experiment on two pairs of sister oak species that show habitat divergence. I found that host-specific soil microbes contribute to habitat divergence and exclusion among sister species of oaks, but …

Factors Impacting Multidisciplinary Team Communication And Patient-Centered Communication Along The Cancer Care Continuum, Jessica Beckham

Dissertations

The deployment of navigators as liaisons between cancer patients and their Multi-Disciplinary Teams (MDT) affords a high level of coordinated care that is otherwise difficult to attain. Highly functioning navigators provide a multitude of support roles, the primary being the dissemination and interpretation of information to and from patients and providers in a manner that is digestible to all recipients. Navigators face hurdles in the form of communication breakdowns within the MDT which can negatively impact level of care and lead to patient uncertainty. Patients face additional barriers of their own which serve to further heighten uncertainty and cause patients …

Utilizing The Expectancy Theory As A Predictor Of Student Academic Success On The Illinois Nurse Assistant Competency Examination, Kelli D. Whittington

Dissertations

This study researches the relationship between motivation and academic success by utilizing the concepts of Vroom's Expectancy Theory: Valence, Expectancy, and Instrumentality. In order to quantify motivation, the Valence, Instrumentality, Expectancy, and Motivation Score (VIEMS) was used. The population assessed consisted of 375 nurse assistant students in the state of Illinois. The self-reported survey tool was evaluated to assess the constructs of Vroom's Expectancy Theory, thus investigating their motivation level. This level was then compared to their performance on the Illinois Nurse Assistant Training Competency Examination.

Personality And Psychopathology Correlates Of Institutional Misconduct Among Juvenile Offenders, Paula Floyd

Dissertations

Juvenile delinquency is a national concern, as delinquent behavior is associated with a host of poor psychosocial outcomes during later adolescence and adulthood. To address delinquency, it is important to understand psychological adjustment among adolescents who have already made contact with the juvenile justice system. One way to explore adjustment within this population involves examining personality and psychopathology correlates of institutional misconduct (i.e., behavioral infractions while incarcerated). While there is a robust body of literature regarding personality and psychopathology correlates of misconduct in adult inmate samples, there has been far less work devoted to these relationships among justice-involved youth. Furthermore, …

The Expansionist Cause: Union Civil War Commemorations As Weapons Of Colonization In The American West, Lindsey Peterson

Dissertations

Eastern collective remembrances of the American Civil War have dominated discussions of the war’s causes and consequences. The West was located far from major Civil War battlefields and historic sites and therefore deemed peripheral to the war and its legacy. Consequently, historians’ eastern-focused arguments about the war’s historical memory have largely been applied to account for all Union veterans and their families’ experiences, even though the evidence is grounded predominantly in source materials from east of the Mississippi River. Using analytical methods of gender and race, The Expansionist Cause examines Union Civil War commemoration in the trans-Mississippi West to argue …

Evaluating The Impact Of Submarine Groundwater Discharge On Nutrients And Trace Elements In Coastal Systems: The Examples Of The Tuckean Swamp (Australia) And The Mississippi Sound (Usa), Amy Moody

Dissertations

Submarine groundwater discharge (SGD) is the advective flow of both fresh terrestrial groundwater and recirculating seawater through aquifer sediments, which is released into the coastal ocean. In this dissertation, I evaluated the impact of SGD on the distributions and input of trace metals and nutrients. In the Tuckean Swamp, an estuary in Australia dominated by coastal acid sulfate soils, I determined the impact of groundwater on Ba and U during the flood season, when the local aquifer is flushed out after a rapid increase in water table elevation. For Ba and U, groundwater contributed up to 18 and 66 % …

Teaching Presence In Online Discussions: Relationship-Based Learning By Design, Mary Quest

Dissertations

Activity Theory, Community of Inquiry Model, Interaction Analysis Model, Online learning, Social Construction of Knowledge, Teaching Presence

Communicating Student Outcomes: A Mixed Methods Study Of Communication Effectiveness, Nicholas Branson

Dissertations

Assessment, Communicating evidence, Education, Evaluation, Higher education, Student outcomes

Burnout In The Field Of Forensic Psychology And Intervention Techniques, Taylor Gary

Dissertations

Forensic psychologists are at a heightened risk for encountering vicarious trauma, compassion fatigue, and burnout, all of which influence quality and continuity of care (Sansbury et al., 2015). The current literature review aims to discuss how burnout relates specifically to the field of forensic psychology. For the purposes of this discussion, clinical psychologists who perform forensic duties, as well as board certified forensic psychologists are considered. Research questions that are addressed in this discussion include what the existing research states regarding vicarious trauma in forensic settings, likely gender differences in burnout and vicarious trauma, and documented interventions that appear most …

Middle Eastern And North African Immigrant Parents Caring For Obese Children: A Phenomenlogical Inquiry, Sadeg Aldolaim

Dissertations

Childhood obesity is one of the most serious public health challenges of the 21st century in the United States and worldwide. Several studies show that children with migrant backgrounds are more likely to be at risk of becoming obese. Obesity is associated with an increased risk of physical diseases and cognitive academic deficits in children and adolescents. The Middle Eastern and North African (MENA) population is one of the fastest-growing immigrant population groups in the United States. However, there are no studies exploring parental involvement in childhood obesity prevention programs among the MENA immigrant population.

The purpose of this qualitative …

Obesity And The University Environment: Assessment Of The Campus And Intervention In The Student Health Services, Tina L. Ortiz

Dissertations

One of the most substantial challenges facing colleges and universities today remains the creation of a healthy campus environment. With more than one-third of college students classified as overweight or obese by body-mass index (BMI) and the known negative health consequences associated with obesity, campuses have a deliberate responsibility to help mitigate this sobering statistic. A significant movement from The American College Health Association (ACHA) to address campus health, Healthy Campus 2020 (HC2020), provides a framework to support campuses in improving the health of their students, staff, and faculty. This project first sought to assess, explore and understand one campus …

La Vraie Bouillabaisse: An Investigation Into The History And Current Practice Of The Provencal Dish Bouillabaisse, And Its Significance As A Traditional Dish, Mathieu Belledent

Dissertations

This thesis examines the history and the current practices (popularity, service styles, and recipes) of the Provencal dish bouillabaisse. It aims to establish the evolution and the traditional characteristics of the dish. It also explores the historical and contemporary popularity as well as the everyday role that bouillabaisse plays in the regional identity of Provencal cooking. Finally, the research questions if bouillabaisse would benefit from a European Union quality schemes protection or official recognition by UNESCO. This research uses an exploratory sequential mixed methods model combining qualitative and quantitative data collection which are analysed in a sequence of phases. …

A Student-Designed Learning Management System: A Mixed-Methods Analysis Of Undergraduate Student Ideas For Improving The Lms, Erin P. Manott Morris

Dissertations

Learning management systems (LMS) are digital tools used to comprehensively deliver education in various settings, including higher education. Using LMSs has been shown to support learner-centered instructional practices and, when used well, to support positive learning outcomes in students. While previous research has examined student use and satisfaction with an LMS, little research has explored student perceptions regarding LMS design. The study evaluated undergraduate students’ perceptions and opinions of an LMS’s design. The study also sought to compare students’ attitudes regarding their LMS during pre-COVID and following the pandemic’s onset. Forty-five students participated in a survey, and three participated in …

Impact Of Immigration Parent-Child Separation Policies On Children’S Attachment Experiences, Daisy Casasnovas

Dissertations

This critical literature review (CRP) project explores the consequences of child-parent separation by deportation laws. Considering the number of Latinx immigrant families immigrating to the United States, this review focused on how the unexpected separation by deportation impacted immigrant families and how these separations affect their children’s development, attachment style, and overall well-being. The review explored the short- and long-term consequences for immigrant children and their families, including children who are U.S.-born and remain in the country without their parents. Results from the review indicate an extensive and significant impact on attachment style and overall developmental impairments. The unexpected separation …

The Molecular Basis Of Diabetic Cardiomyopath, Ahmed Salaheldin Mustafa Ali Sultan

Dissertations

Diabetes mellitus (DM) is a major and worsening global health problem. Type 2 diabetes mellitus (T2DM) accounts for more than 90% of DM and the global epidemic of obesity largely explains the dramatic increase in the incidence and prevalence of T2DM over the past 20 years. Cardiovascular complications are the major cause of morbidity and mortality in diabetic patients. The electrocardiogram (ECG) of diabetic and obese patients is frequently disturbed. The aim of this project was to characterize and clarify the molecular basis of electro-mechanical dysfunction in the hearts of type 2 diabetic and type 2 diabetic/obese rats. Experiments were …

First Responder Coping And Its Impact On Resilience, Ptsd Symptomology, And Hypervigilance, Bianca Bullock

Dissertations

The present study investigated coping strategies utilized by first responders and how those strategies relate to resilience, PTSD symptomology, and hypervigilance. The purpose of this study is to help provide more detailed information as to how first responders’ coping impacts their overall functioning. First responders (N = 181), including law enforcement officers, firefighters, paramedics, and emergency medical technicians, completed online surveys measuring whether engaged or disengaged coping strategies were used to manage stressful situations. Self-perceived resilience, PTSD symptoms, and hypervigilance were also measured. A one-way between-groups multivariate analysis of variance was performed to test the relationships between engaged versus disengaged …

An Investigation Of The Unintended Consequences Of Florida’S Stand Your Ground Law And Leadership’S Role In Both Implementing The Law And Revising It, Anthony Keel

Dissertations

The State of Florida has become a negative representation of the Stand Your Ground Law due to the three unintended consequences which developed since that law was passed in 2005. They are the disparity of African American incarceration rates when the law is applied, the increase in justifiable homicides, and the exponential increase in concealed carry permits. The intent of this qualitative research study was to inspire the leadership of the state of Florida to actively support and participate in reexamining, reassessing, and revising the Stand Your Ground Law. The literature review suggested that the law is ambiguous because it …

The Relationship Between Community Policing, Police Profiling And Brutality, And How It Relates To Minority Communities’ Perceptions Of Police, Tamela Ali

Dissertations

Ethnic communities in the United States are at a greater risk of police-related mortality and experiencing racial profiling by the police and are more likely to report negative perceptions of the police than White Americans. Community policing has been proposed as a viable solution to this problem. Residents’ perceptions of the police seem to be predicted by race, where they live, and other factors. Studies also show that the intensity of racial profiling and brutality by the police differs in urban and suburban areas. Therefore, it is difficult to generalize the perceptions of the police across all communities. This study …

Analyzing Fluctuation Of Topics And Public Sentiment Through Social Media Data, Haoyue Liu

Dissertations

Over the past decade years, Internet users were expending rapidly in the world. They form various online social networks through such Internet platforms as Twitter, Facebook and Instagram. These platforms provide a fast way that helps their users receive and disseminate information and express personal opinions in virtual space. When dealing with massive and chaotic social media data, how to accurately determine what events or concepts users are discussing is an interesting and important problem.

This dissertation work mainly consists of two parts. First, this research pays attention to mining the hidden topics and user interest trend by analyzing real-world …

Computation Of Risk Measures In Finance And Parallel Real-Time Scheduling, Yajuan Li

Dissertations

Many application areas employ various risk measures, such as a quantile, to assess risks. For example, in finance, risk managers employ a quantile to help determine appropriate levels of capital needed to be able to absorb (with high probability) large unexpected losses in credit portfolios comprising loans, bonds, and other financial instruments subject to default. This dissertation discusses the computation of risk measures in finance and parallel real-time scheduling.

Firstly, two estimation approaches are compared for one risk measure, a quantile, via randomized quasi-Monte Carlo (RQMC) in an asymptotic setting where the number of randomizations for RQMC grows large, but …

Brainless But Smart: Investigating Cognitive-Like Behaviors In The Acellular Slime Mold Physarum Polycephalum, Subash Kusum Ray

Dissertations

Evolutionary pressures to improve fitness, have enabled living systems to make adaptive decisions when faced with heterogeneous and changing environmental and physiological conditions. This dissertation investigated the mechanisms of how environmental and physiological factors affect the behaviors of non-neuronal organisms. The acellular slime mold Physarum polycephalum was used as the model organism, which is a macroscopic, unicellular organism, that self-organizes into a network of intersecting tubules. Without using neurons, P. polycephalum can solve labyrinth mazes, build efficient tubule networks, and make adaptive decisions when faced with complicated trade-offs, such as between food quality and risk, speed and accuracy, and exploration …

Stochastic Modeling Of Flows In Membrane Pore Networks, Binan Gu

Dissertations

Membrane filters provide immediate solutions to many urgent problems such as water purification, and effective remedies to pressing environmental concerns such as waste and air treatment. The ubiquity of applications gives rise to a significant amount of research in membrane material selection and structural design to optimize filter efficiency. As physical experiments tend to be costly, numerical simulation and analysis of fluid flow, foulant transport and geometric evolution due to foulant deposition in complex geometries become particularly relevant. In this dissertation, several mathematical modeling and analytical aspects of the industrial membrane filtration process are investigated. A first-principles mathematical model for …

Optimizing Incentives For Systems With Heterogeneous Agents, Chen Chen

Dissertations

This dissertation explores new models and applications based on the game theory of incentives. This exploration starts with controlling an invasive insect problem to address one of the most significant challenges facing our forests, the invasion of the Emerald ash borer (EAB), a non-native, wood-boring insect that threatens to kill most ash trees in North America, through designing two new cost-sharing programs between the landowners and local governments. Ash trees are one of North America’s most widely distributed tree genera and a vital part of the green infrastructure of cities, where they provide residents with numerous social, economic, and ecological …

Low-Reynolds-Number Locomotion Via Reinforcement Learning, Yuexin Liu

Dissertations

This dissertation summarizes computational results from applying reinforcement learning and deep neural network to the designs of artificial microswimmers in the inertialess regime, where the viscous dissipation in the surrounding fluid environment dominates and the swimmer’s inertia is completely negligible. In particular, works in this dissertation consist of four interrelated studies of the design of microswimmers for different tasks: (1) a one-dimensional microswimmer in free-space that moves towards the target via translation, (2) a one-dimensional microswimmer in a periodic domain that rotates to reach the target, (3) a two-dimensional microswimmer that switches gaits to navigate to the designated targets in …

Understanding The Role Of Magnetic Field Evolution In The Initiation And Development Of Solar Eruptions, Nian Liu

Dissertations

This dissertation aims to understand the initiation and evolution of solar eruptions. The essential science questions to answer include: What is the role of magnetohydro dynamic (MHD) instabilities and magnetic reconnection in triggering and driving eruptions? What are the role of Kink Instability (KI) and Torus Instability (TI) in determining the successful and failed eruptions? What is the thermal behavior of flare precursors in the initiation stage of solar eruptions? Finally, how does the corona magnetic field respond to the flare eruptions? The dissertation mainly includes the following studies.

First, this dissertation presents a multi-instrument study of the two precursor …

Flexibility Vs Consistency: Quantifying Differences In Neuromodulatory Elicited Patterns Of Activity, Elizabeth M. Cronin

Dissertations

Central pattern generating circuits underly fundamental behaviors such as respiration or locomotion and are under the influence of neuromodulators. The presence of neuromodulators is thought to confer flexibility to these circuits to generate distinct patterns of activity to meet distinct behavioral needs. Network output flexibility can be achieved by distinct classes of neuromodulators, those which have convergent cellular actions but divergent circuit actions or by those which have divergent cellular actions but convergent circuit actions.

Both classes of neuromodulator exist in the stomatogastric nervous system of the crab Cancer borealis and influence the activity of a central pattern generating circuit …

Sensorimotor Content Of Multi-Unit Activity In The Paramedian Lobule Of The Cerebellum, Esma Cetinkaya

Dissertations

Based on Center for Disease Control and Prevention report 2016, around 39.5 million people in the United States suffer from motor disabilities. These disabilities are due to traumatic conditions like traumatic brain injury (TBI), neurological diseases such as amyotrophic lateral sclerosis (ALS), or congenital conditions. One of the approaches for restoring the lost motor function is to extract the volitional information from the central nervous system (CNS) and control a mechanical device that can replace the function of a paralyzed limb through systems called Brain-Computer Interfaces (BCI).

One of the major challenges being faced in BCIs and also in general …