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969 Matching Results
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Investigating the Mechanisms involved in Traffic-Generated Air Pollution: Mediated Disruption of the Blood-Brain Barrier in a Wild Type Mouse Model using a Pharmaceutical Intervention Approach
This study investigated whether oxLDL and/or angiotensin (Ang) II signaling pathways mediate traffic-generated air pollution- exposure induced alterations in blood-brain barrier (BBB) integrity and permeability in a healthy wild type (C57Bl/6) mouse model; additionally, whether these outcomes are exacerbated by a high fat-diet investigated. An environmentally relevant concentration of a mixture of vehicle engine exhaust (MVE) was used. To investigate the hypotheses, 12 wk old male C57Bl/6 mice on either a high fat (HF) or low fat (LF) diet were randomly assigned to inhalational exposure of either filtered-air (FA) or 30 µg PM/m3 diesel exhaust + 70 µg PM/m3 gasoline exhaust (MVE) for 6 hr/day for 30 days. Additionally, we examined mechanisms involved in MVE-mediated alterations BBB integrity using a novel BBB co-culture in vitro model, consisting of mouse primary cerebral vascular endothelial cells on an apical transwell and astrocytes in the basal compartment, which was treated with plasma from the mice on our exposure study. Our in vivo exposure study results showed that MVE inhalation resulted in increased circulating plasma oxLDL and Ang II, compared to FA controls. Additionally, we observed increased cerebral microvascular expression of oxLDL receptors, LOX-1 and CD-36, and Ang II receptor subtype 1 (AT1) in …
Date:
August 2020
Creator:
Suwannasual, Usa
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Interstate Influence Strategies in Border Crises: 1918-2015
Within interstate militarized disputes, states use different kinds of influence strategies, like bullying, reciprocating, and trial-and-error. My dissertation examines state influence strategies within border disputes. This context serves as a hard test which could testify if state behaviors in world politics are mainly driven by the salience of contested issues. Or other factors, like leader militarized backgrounds (e.g., participating in rebellions or military service), may also at work. On the other hand, focusing on state influence strategies could be a promising direction to investigate the dynamics of border disputes, like border crisis outcomes. My dissertation contains three chapters. The first chapter explores the rationales behind state choices of influence strategies in border crises by focusing on leaders and their militarized experiences. The second chapter focuses on the influence strategy's short-term effect by examining how do hey influence border crisis outcomes? The third chapter examines the influence strategy's long-term impact by investigating how do they affect the durability of border claims? My dissertation has some important findings. First, leader militarized backgrounds influence state choices of influence strategies. Second, bullying strategies create escalations, which make border crises more likely to end in stalemate or decisive outcomes. By contrast, both reciprocating and trial-and-error …
Date:
August 2020
Creator:
Yao, Jiong
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Democracy of Death: US Army Graves Registration and Its Burial of the World War I Dead
The United States entered World War I without a policy governing the burial of its overseas dead. Armed only with institutional knowledge from the Spanish-American War twenty years prior, the Army struggled to create a policy amidst social turmoil in the United States and political tension between France and the United States.
Date:
August 2020
Creator:
Hatzinger, Kyle
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
How is the Volatility Priced by the Stock Market?
Traditional portfolio theory suggests that, in equilibrium, only the market risk is priced in the cross-section of expected stock returns. However, if the market is not perfect and investors are constantly changing investing behaviors based on their perceptions about future market outlook, then non-traditional risk factors could potentially provide significant power of describing the expected stock returns. This dissertation has two essays on the pricing of volatility, in which the market is not assumed to be frictionless or perfect. Essay 1 focuses on the pricing of individual volatility in penny stocks. Empirical results show that individual volatility plays an important role in describing the average cross-sectional returns of penny stocks. Resorting to the rolling portfolio approach, evidences indicate that portfolios consisting of penny stocks with high individual volatilities, on average, earned much higher returns than portfolios consisting of penny stocks with low individual volatilities. This effect is statistically significant when multiple factors are controlled simultaneously. Essay 2 focuses on the pricing of the market volatility among individual stocks. Following the rolling portfolio method, Essay 2 constructs portfolios that consist of individual stocks with various market volatility exposures. Traditional risk factors such as market beta, size, book-to-market, and momentum are controlled …
Date:
August 2020
Creator:
Yu, Huaibing
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Predictors of Perfectionistic Tendencies in Sport among Undergraduate Kinesiology Students
The purpose of this study was to examine current kinesiology students' athletic identity, identity foreclosure, perceived task value in sport, and perfectionism. An online survey was distributed via email to current kinesiology students. The survey contained questions regarding demographic information and items from the Athletic Identity Measurement Scale, Extended Objective Measure of Ego Identity Status, Perceived Task Value in Sport, Sport Multidimensional Perfectionism Scale-2, and Multidimensional Inventory of Perfectionism in Sport. Results of the Pearson moment correlations indicated that the higher the athletic identity, the higher the subjective task value, identity foreclosure, perfectionistic strivings, and perfectionistic concerns. Multiple regression analyses were performed to further examine the predictive power of athletic identity, subjective task value, and identity foreclosure for perfectionistic strivings and perfectionistic concerns. Results indicated that athletic identity and subjective task value were significant predictors of perfectionistic strivings. Results also showed that athletic identity and identity foreclosure were significant predictors of perfectionistic concerns. Future research should replicate the study using participants from different geographical regions. Furthermore, future research should consider a longitudinal and qualitative study to investigate the development of subjective task value in sport.
Date:
August 2020
Creator:
Boyd, Christopher A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Effect of Trauma-Related Stress during Acute Alcohol Intoxication on Driving-Related Risky Decision-Making
Alcohol-related motor vehicle crashes are a major preventable cause of death in the United States. One potential factor that may modulate the influence of alcohol intoxication on driving-related decision-making is posttraumatic stress. The current study evaluated the influence of induction of acute trauma-related stress (via script-driven imagery) during alcohol intoxication (.06% BrAC) on driving-related risky decision-making – willingness to drive, driving-related decision-making (i.e., attempted red light runs), and driving-related reaction time (i.e., braking latency) – among 56 trauma-exposed (currently symptomatic) adult drinkers from the community (M = 25.32; 46.4% female). Results indicated that trauma-related stress may exacerbate willingness to drive during a state of acute alcohol intoxication, but, alternatively, may have only a minimal-to-moderate effect on performance-based, driving-related decision-making (i.e., red light runs), and a potentially mitigating impact on driving-related reaction time (i.e., braking latency) under the influence of alcohol. Generally, results suggest that trauma-related stress may differentially impact varying aspects of driving-related risky decision-making, above and beyond the influence of alcohol. Implications for theoretical modeling for driving-related decision-making during acute intoxication and for the advancement of education and intervention efforts, as well as suggestions for future directions, including methodological and procedural improvements, are discussed.
Date:
August 2020
Creator:
Kearns, Nathan T
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Investigation of the Influence of Attributional Complexity, Intolerance, Optimism, and Experiential Avoidance on Personal Psychological Distress
The purpose of this study was to investigate the impact of low attributional complexity, intolerance, optimism, and experiential avoidance (EA) on psychological distress (stress, anxiety, and depression); specifically, the mediating role of EA in these relationships was examined. Structural equation modeling (SEM) was utilized to test the hypothesized model. The overall model accounted for 62% of the variance in psychological distress. The direct negative effect of intolerance on psychological distress and the mediator effect of EA on the relationship between optimism and psychological distress were found. These results and their implications, along with study limitations and future directions are discussed.
Date:
August 2020
Creator:
Ergüder, Leyla
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Pedagogical Approach and Strategies for the Trumpet Ensemble
The trumpet ensemble has increasingly become a popular chamber ensemble inside music programs at the secondary and collegiate level. Chamber music ensembles are frequently guided by both democratic processes and ensemble coaches with limited chamber music experience. As trumpet ensembles grow in popularity, pedagogical resources are needed to guide rehearsals. This project serves as a guide for educators and performers to focus on fundamental issues related to trumpet ensembles as well as strategies for ensemble rehearsal.
Date:
August 2020
Creator:
Jensen, Aaron (Trumpeter)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Performance Guide to Cécile Chaminade's "Concertstück for Piano and Orchestra," Op. 40
Cécile Chaminade (1857-1944) was a remarkably successful French composer and pianist for a woman in the early part of her career, although her reputation waned rapidly after her death. Concertstück (1888), a single movement for piano and orchestra, was her only work in this medium. It requires many traditional piano skills and therefore can serve admirably as a comprehensive technical and artistic study. This dissertation includes a formal analysis of this piece, a discussion of each type of specific piano technique it requires, and practice suggestions.
Date:
August 2020
Creator:
Zhuang, Yuan (Pianist)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Pedagogical Guide to Teaching Tone Production for Elementary-Level Piano Students, with Examples from Appropriate Elementary-Level Music
The early stage of piano students' training is one of the most important, because it is then that they establish their habits for life. Those who teach beginners need clear principles for developing a solid technical foundation and for preventing bad technical habits. One of the most difficult principles to inculcate in young students is that of tone production and quality. The primary purpose of this study is to provide a pedagogical guide to help piano teachers teach tone production to elementary-level students. To accomplish this purpose, the strategies of the twentieth-century pedagogues Josef Lhévinne, Josef Hofmann, and Heinrich Neuhaus are examined, and applied to the elementary-level piano literature. This study offers practical training suggestions to teachers of elementary piano students as well as musical examples from high-quality piano literature to accompany these suggestions.
Date:
August 2020
Creator:
Kim, Gyuwan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Frameworks for Attribute-Based Access Control (ABAC) Policy Engineering
In this disseration we propose semi-automated top-down policy engineering approaches for attribute-based access control (ABAC) development. Further, we propose a hybrid ABAC policy engineering approach to combine the benefits and address the shortcomings of both top-down and bottom-up approaches. In particular, we propose three frameworks: (i) ABAC attributes extraction, (ii) ABAC constraints extraction, and (iii) hybrid ABAC policy engineering. Attributes extraction framework comprises of five modules that operate together to extract attributes values from natural language access control policies (NLACPs); map the extracted values to attribute keys; and assign each key-value pair to an appropriate entity. For ABAC constraints extraction framework, we design a two-phase process to extract ABAC constraints from NLACPs. The process begins with the identification phase which focuses on identifying the right boundary of constraint expressions. Next is the normalization phase, that aims at extracting the actual elements that pose a constraint. On the other hand, our hybrid ABAC policy engineering framework consists of 5 modules. This framework combines top-down and bottom-up policy engineering techniques to overcome the shortcomings of both approaches and to generate policies that are more intuitive and relevant to actual organization policies. With this, we believe that our work takes essential steps towards …
Date:
August 2020
Creator:
Alohaly, Manar
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Design Optimization of Functionalized Silica-Polymer Nanocomposite through Finite Element and Molecular Dynamics Modeling
This dissertation focuses on studying membrane air dehumidification for a membrane moisture exchanger in a membrane heat pump system. The study has two parts: an optimization of membrane moisture exchanger for air dehumidification in the macroscale, and diffusion of water vapor in polymer nanocomposites membrane for humid air dehumidification in the nanoscale. In the first part of the research, the mass transport of water vapor molecules through hydrophilic silica nanochannel chains in hydrophobic polyurethane matrix was studied by simulations and experiments for different membrane moisture exchanger design configurations. The mass transport across the polymer nanocomposite membrane occurs with the diffusion of moist air water vapor molecules in the membrane moisture exchanger in a membrane heat pump air conditioning system for air dehumidification purposes. The hydrophobic polyurethane matrix containing the hydrophilic silica nanochannel chains membrane is responsible for transporting water vapor molecules from the feed side to the permeate side of the membrane without allowing air molecules to pass through.In the second part of the research, diffusion analysis of the polymer nanocomposite membrane were performed in the nanoscale for the polymer nanocomposite membrane. The diffusion phenomena through the polymer, the polymer nanocomposite without modifying the silica surfaces, and the polymer nanocomposite …
Date:
August 2020
Creator:
Almahmoud, Omar H. M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Who Makes the Decision? Managerial Influence on Corporate Boards and Auditor Selection, Change, and Compensation
This dissertation examines whether managers influence corporate boards of directors in their auditor selection, change, and compensation decisions. This topic is important because it addresses concerns that the Sarbanes-Oxley Act of 2002 (SOX) is not effective in eliminating managerial influence over auditor engagement decisions and that it may provide a false sense of security to investors. These concerns are based on the implicit assumption that managers prefer weaker governance oversight and lower audit quality. However, empirical research testing associations between managerial influence and audit-related decisions post-SOX is scarce and generally guided by agency theory. Incorporating agency, stewardship, and resource dependence perspectives, I find that managerial preferences for auditor selection are not aligned. Specifically, CEOs positively influence the selection of higher quality auditors, whereas CFOs have the opposite effect. Further, CEOs who hold powerful roles as chairs of their companies' boards of directors appear to mitigate the negative influence of CFOs and inside directors on audit quality. CEOs serving in dual roles also oppose auditor turnover when lower earnings quality prompt higher demand for audit effort. Finally, my study provides some evidence that management exercises downward pressures on audit fees, suggesting that managers utilize their authority beyond the regulations established by …
Date:
August 2020
Creator:
Hightower, Sonja
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Dream Deferred: Suicide and Self Harm in Middle America
Middle America is dying. The United Nations reports the average number of deaths per 1,00 population in the U.S. has steadily increased an average of 1.2 per 1,000 persons annually since 2015. Existing research offer conflicting theories regarding the factors influencing the phenomenon. the purpose of this study was to examine reliable and valid secondary data to determine if statistical evidence exists to support the prevailing theories. Statistical evidence was observed that suggests the crude death rates among U.S. non-Hispanic white (NHWs) populations was significantly higher than other U.S. population segments between 2015 and 2018. Statistical evidence was also observed that suggests U.S. NHWs sought ambulatory services for alcohol and drug use self-injuries at higher rates than other U.S. population segments. However, the evidence suggest that U.S. NHWs are not more likely to experience earlier than expected deaths from excessive alcohol or drug use than other U.S. population segments. The study's implications are that U.S. policy makers should consider long-term economic development and sustainability strategies focused on the promotion of higher education as a deterrent to self-harm among U.S. residents without college degrees or skills certifications. The study recommends future large-scale quantitative, qualitative, and mixed-use studies that examine the micro, …
Date:
August 2020
Creator:
Johnson, Jennie Larry
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Anxiety Sensitivity and Nonmedical Prescription Drug Use among Adolescents
Research suggests that non-medical prescription drug (NMPD) use is becoming increasingly prevalent, particularly among adolescents. A critical step towards developing effective intervention efforts requires identifying adolescents who are at risk for NMPD use. An extensive literature suggests that both adolescents and adults with elevated anxiety sensitivity (AS) are at greater risk for problematic substance use, and a small body of work has identified similar links with NMPD use specifically among adults. However, most of this literature combines all prescription drugs into a single category, and no work has evaluated the relation between AS and NMPD use among adolescents. The current study endeavors to further this area of research by examining the relation between AS (overall and subscales) and NMPD use among adolescents. The project evaluated 276 adolescents (age 9-19 years) enrolled in a residential treatment program on level of AS, including sub-dimensions (i.e., cognitive, physical, and social), and NMPD use across three categories of drugs: analgesic (e.g., Vicodin®), anxiolytic (e.g., Xanax®), and stimulant (e.g., Adderall®). A series of logistic regression models indicated that overall AS predicted nonmedical analgesic use, but not anxiolytic/sedative or stimulant use. A closer investigation of the AS subscales demonstrated that only the AS social subscale significantly …
Date:
August 2020
Creator:
Carey, Caitlyn
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Comparative Resistomics of Ancient and Modern Human Microbiomes
Increased exposure to antibiotics has led to the dissemination of genes conferring resistance to antimicrobial metabolites throughout human microbiomes globally via horizontal gene transfer (HGT). This has resulted in the emergence of new resistant strains leading to a rising epidemic of deaths from previously treatable infections. Evidence suggests that before the age of anthropogenic antibiotic use, microbes living within a community produced antibiotic metabolites and, subsequently, maintained such genes for several useful functions and a balance of diversity in nature. The question of the origin of these resistant genes is difficult to answer, but with continued advancements in ancient genomic analysis, researchers have developed methods of acquiring a more accurate representation of the microbiome associated with our human ancestors by extracting fossilized microbial specimens from dental calculus and directly sequencing the metagenomes. This thesis outlines the production of taxonomic and functional profiles of 20 different human and non-human oral microbiome samples using metagenomics tools originally developed for living individuals, altered for use with ancient microbial specimens. Putative antimicrobial resistant (AMR) genes derived from these profiles were reconstructed and conserved functional regions were identified. From the data that is available regarding the human microbiome from a range of time points throughout …
Date:
August 2020
Creator:
Johnson, Sarah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Analysis of the Representation of Queen Elizabeth I of England in the Operas by Rossini, Donizetti, and Thomas in the Context of Nineteenth-Century Vocal Style and Historical Influence
The purpose of this research is to analyze representations of Queen Elizabeth I of England in nineteenth-century Franco-Italian opera, and the relationship of these representations to contemporaneous singing style and the historical background. The basis for this analysis is three arias: "Quant'é grato all'alma mia" from Elisabetta, regina d'Inghilterra (1815) by Gioachino Rossini (1792-1868), "Sì, vuol di Francia il rege...Ah! quando all'ara scorgemi...Ah! dal ciel discenda un raggio" from Maria Stuarda (1835) by Gaetano Donizetti (1797-1848), and "Malgré l'éclat qui m'environne" from Le songe d'une nuit d'été (1850) by Ambroise Thomas (1811-1896). This research is divided into two main sections: the historical background of Italy and France in the nineteenth century, especially in the contemporaneous vocal style and fashions of literature; and a discussion of the composers' musical and dramatic choices for Queen Elizabeth I in the three selected arias. Chapter 2 is a brief introduction to the early nineteenth-century Franco-Italian historical background, vocal style, and popular literature. Chapter 3 presents an analysis of the three arias. The last chapter summarizes the representations of Elizabeth I in nineteenth-century politics, literature, and vocal style.
Date:
August 2020
Creator:
Hsiao, Han
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Influence of Police Training on Law Enforcement Officers Occupational Identity in an Evolving Police Culture
The disproportionate number of police-involved shootings reflect the underlying conditions of traditionally conservative, racist policing. Recent updates and communication refinements to police training methodologies could improve training processes, which in turn, may improve societal perceptions of police in the United States. Law enforcement officers in the United States have become the focus of public policy outcry and generalized distrust, further complicating the dangers of contemporary policing. Concealed weapons and the close proximity of civilians policing the police with cellphone cameras complicate issues of officer safety. State and national incidents have resulted in police processes and behaviors being broadcast and violently challenged. In response to these challenges, Texas police academies and law enforcement training agencies are changing the way police learn to police. During the preparation of this study, the Texas Commission on Law Enforcement adopted a legislatively mandated update to the Basic Peace Officer Certification training. After a three-year revision process, in late 2019, the Texas Commission on Law Enforcement replaced the former 643-hour Basic Peace Officer Course with the newest Basic Peace Officer Course #1000696. Through its goals, definitions, and instructional guides, the Course #1000696 could potentially stimulate occupational identity, unify community policing culture, and foster community perception repair.
Date:
August 2020
Creator:
Fajardo, Ruth Noemi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Clementi the Scientist: Contemporary Reception of His Symphonies
Muzio Clementi's symphonies were first performed in London between 1786 and 1796. After an extended hiatus from 1796 to 1813, his symphonic works appeared on programs again from 1813 to 1824. Clementi's career as a symphonist corresponds closely with trends in London's concert life. The reception of Clementi's symphonies during his lifetime has frequently been misinterpreted by scholars who oversimplify the use of "science" in musical discourse of the day and fail to consider the positive connotations of this adjective, so frequently applied to Clementi. Musical discourse at the time addressed the science and art of music emphasizing a composition, or its composer's, science, harmony, effects, genius, and the audience's response. Though an unstated ideal, reviews evince a preference for balancing scientific and artistic display. Reviews of Clementi's symphonies suggest he initially struggled to balance the technical and artistic qualities of his compositions but succeeded, according to reviews, in finally doing so in 1796. After his early efforts, Clementi was consistently praised as worthy to stand among the current and most prestigious composers of the continent: Haydn and Mozart initially, and Beethoven and Rossini later.
Date:
August 2020
Creator:
Asber, Joyce
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Borrowing Culture: British Music Circulating Libraries and Domestic Musical Practice, 1853-1910
In Victorian Britain, music circulating libraries libraries operated by music publishers Novello & Co. and Augener & Co. supported upper- and upper-middle-class patrons in their pursuit of cultural capital that would help them perform their socioeconomic status. Studying these libraries in the context of domestic music-making reveals the economic and social impact of these libraries in the lives of amateur musicians and in the music publishing industry. An analysis of the account books in the Novello Business Archives demonstrates that the direct income that Novello & Co., Ltd.'s Universal Circulating Musical Library generated was negligible at best. Yet the fact that the library continued to be part of the business for over forty years indicates that Novello & Co., Ltd. found it to be profitable in some way. In this case, the library could have helped the publisher to attract customers through branding and advertising, in addition to informing publishing decisions by tracking demand. Catalogs for music circulating libraries, as well as for the publishers who owned them, contain lists of library and publisher inventory and pricing. Studying changes in these catalogs reveals how patrons' tastes changed over time. A case study of violin-piano duets in multiple catalogs confirms a …
Date:
August 2020
Creator:
Cooper, Amy Nicole
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Role of Eigenvalues of Parity Check Matrix in Low-Density Parity Check Codes
The new developments in coding theory research have revolutionized the application of coding to practical systems. Low-Density Parity Check (LDPC) codes form a class of Shannon limit approaching codes opted for digital communication systems that require high reliability. This thesis investigates the underlying relationship between the spectral properties of the parity check matrix and LDPC decoding convergence. The bit error rate of an LDPC code is plotted for the parity check matrix that has different Second Smallest Eigenvalue Modulus (SSEM) of its corresponding Laplacian matrix. It is found that for a given (n,k) LDPC code, large SSEM has better error floor performance than low SSEM. The value of SSEM decreases as the sparseness in a parity-check matrix is increased. It was also found from the simulation that long LDPC codes have better error floor performance than short codes. This thesis outlines an approach to analyze LDPC decoding based on the eigenvalue analysis of the corresponding parity check matrix.
Date:
August 2020
Creator:
Adhikari, Dikshya
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Athletic Participation as a Protective Factor for Childhood Maltreatment
The purpose of the study was to examine whether athletic participation as a child and/or adolescent acts as a protective factor for youth who endure childhood maltreatment. After screening for childhood maltreatment, our 269 participants were separated into either an athlete group or a non-athlete group and compared using two one-way multivariate analyses of covariance (MANCOVA). Emotional neglect served as the covariate due to non-athletes' significantly higher emotional neglect scores than athletes. The first MANCOVA compared athletes and non-athletes on positive outcomes, which included measures of post-traumatic growth, three adaptive coping strategies, and self-compassion. In the second MANCOVA, we assessed for differences between athletes and non-athletes on negative outcomes, which included measures of traumatic, depressive, and anxious symptomology and a maladaptive coping strategy. Neither MANCOVA reached significance, rejecting our hypothesis that athletes would be more resilient than non-athletes to the negative impact of childhood maltreatment. Discussion considers possible reasons for the lack of significance, such as the recency of athletic participation or the specific type of maltreatment experienced, as well as limitations and directions for future research.
Date:
August 2020
Creator:
Rushton, James R
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Health Reform Implementation Analysis: A Guide to Policy Development for Geriatric Care Planning, Integration and Evaluation
In the context of health care delivery for senior citizens, this research utilizes three studies that examine the development and implementation of health policy and the factors that can directly or indirectly impact the effective delivery of health services to senior citizens. It utilizes three essays employing mixed methods (qualitative and quantitative) methods including semi structured interviews, multiple regression and partial least squares structural equation modelling to examine the extent to which the implementation of health services delivered attributes of primary and integrated care to seniors. The two essays identified methods, approaches and strategies of integrated care relevant to the development of policy that can be successfully implemented when the contextual issues that older people consider to be important in maintaining their functional capabilities and their motivation to improve health as perceived by them are addressed. Consequent upon the results from these studies, the third essay examines the methodological issues on integrated geriatric care implementation when guidelines for effective policy development identified were not followed. By highlighting the relationship between effective policy and patient satisfaction, these three essays' recommended approach enhances the theory of health design that confirms that theoretical models of primary care must incorporate the system, process and …
Date:
August 2020
Creator:
Abah, Theresa
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Kriging Methods to Exploit Spatial Correlations of EEG Signals for Fast and Accurate Seizure Detection in the IoMT
Epileptic seizure presents a formidable threat to the life of its sufferers, leaving them unconscious within seconds of its onset. Having a mortality rate that is at least twice that of the general population, it is a true cause for concern which has gained ample attention from various research communities. About 800 million people in the world will have at least one seizure experience in their lifespan. Injuries sustained during a seizure crisis are one of the leading causes of death in epilepsy. These can be prevented by an early detection of seizure accompanied by a timely intervention mechanism. The research presented in this dissertation explores Kriging methods to exploit spatial correlations of electroencephalogram (EEG) Signals from the brain, for fast and accurate seizure detection in the Internet of Medical Things (IoMT) using edge computing paradigms, by modeling the brain as a three-dimensional spatial object, similar to a geographical panorama. This dissertation proposes basic, hierarchical and distributed Kriging models, with a deep neural network (DNN) wrapper in some instances. Experimental results from the models are highly promising for real-time seizure detection, with excellent performance in seizure detection latency and training time, as well as accuracy, sensitivity and specificity which compare …
Date:
August 2020
Creator:
Olokodana, Ibrahim Latunde
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library