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Role Of Local Renin-Angiotensin System In Potentiating Early Calcific Aortic Valve Disease, Jessica Perez

Graduate Theses and Dissertations

Angiotensin-II (Ang-II), a peptide hormone, is a potent vasoconstrictor and cell mitogen. It has been implicated in the development of hypertension as well as atherosclerosis. Recent work has shown that sclerotic aortic valves possess expression of angiotensin type I receptor (AT-1R) and angiotensin converting enzyme (ACE), suggesting altered angiotensin signaling during disease. The role of altered angiotensin signaling on aortic valve mechanics, however, is not clearly understood. We seek to understand the direct effects of the renin angiotensin signaling (RAS) system on the biological and biomechanical properties of aortic valve tissue and develop a finite constitutive model that mimics the …

On The Variations Of 'Occupatio' In "Richard Ii", William Kelly Reeder

Graduate Theses and Dissertations

Recent scholarship of Shakespeare’s Richard II has been interested in or preoccupied with its historical relations. Particularly the plays association with the Essex Rising of 1601, and the censorship of the deposition scene, both of which seem to resonate for history with Elizabeth’s enigmatic comment expressing her identification with Shakespeare’s portrayal of Richard II.

This paper proposes to resolve the question of the play’s censorship by interpreting the deposition scene as a dramatization of transubstantiation, perhaps triggering Elizabethan censors.

Transubstantiation is the doctrine by which the Catholic Church interprets the Eucharist using the distinction between substance and accidens (eternal and …

The Effect Of A Training Clinic On The Self-Efficacy Of Counselors In Training, Jihene Ayadi

Graduate Theses and Dissertations

The primary focus of this study was to examine the differences between trainees’ perceived self-efficacy when they graduate from a counseling program that has a community based mental health training clinic versus a program without a training clinic. A web-based survey was developed with the questions from the Counseling Self-Efficacy Inventory (COSE) (Larson et al., 1992) and 45 (N = 45) participants took the survey online. Participants were students enrolled and taking a practicum or internship class in a counseling program with a training clinic (WTC) or in a counseling program without a clinic (WTTC). Mann-Whitney Wilcoxon test, a non-parametric …

Optimization Of The Light Environment For Broiler Chickens, Douglas J. Aldridge

Graduate Theses and Dissertations

The use of artificial light sources has been necessitated by the use of fully enclosed rearing facilities for improved environmental control. Light Emitting Diodes (LED) have been developed as a light source that reduce the utilities required to provide equal light to that of incandescent sources. The following reports were carried out to investigate the effects of two light color temperatures, light intensity and light intensity gradients on broiler chicken production and behavior. The first investigation consisting of two consecutive trials investigated the effect of two light color temperatures (2700 K and 5000 K) in addition to the preference for …

Assessment Of Control Of Ppo-Resistant Palmer Amaranth And Salvage Options In Herbicide-Resistant Cotton, Wyatt D. Coffman

Graduate Theses and Dissertations

Palmer amaranth has been the most limiting weed in cotton production in the state of Arkansas for many years. Recently, resistance of Palmer amaranth to the protoporphyrinogen oxidase (PPO)-inhibiting site of action has been discovered at various locations across the cotton-producing region of the state. Cotton varieties have been developed with resistance to synthetic auxin (WSSA Group 4) herbicides. However, research to date has shown PPO-resistant Palmer amaranth to be more difficult to control with herbicides that target alternative sites of action. Herbicide efficacy is also known to vary with weed size, varying spray parameters, and environmental conditions. Preliminary research …

Experimental And Computational Study On Magnetic Nanowires Of Layered Titanates, Caleb Layne Heath

Graduate Theses and Dissertations

The intricate nanostructures of layered titanates are unique among nanomaterials due to their easy and inexpensive syntheses. These nanomaterials have been proven valuable for use in industries as varied as energy, water treatment, and healthcare, and can be produced at industrial scales using already existent equipment. They have complex morphology, and surface structure well suited to chemical modification and doping. However, there is a longstanding debate on their lattice structure after the doping. There is a long-unmet need to understand, using both experimental and simulation methods, how dopants alter the clay-like layered crystal structure and associated physical and chemical properties. …

A Comparison Of The Curricula Of The Top-Ranked Prelicensure Baccalaureate Nursing Programs In The United States, Silvia Imanda

Graduate Theses and Dissertations

What constitutes an ideal prelicensure nursing curriculum is not well understood. Specifically, what are the strategic curricular sequencing and curricular themes or focus might be included to contribute to producing high quality graduates? The purpose of this qualitative multiple case study investigation was to look at successful programs and identify effective curricular sequencing and curricular themes or focus that might be inferred to have contributed to producing high quality graduates. Seven top-ranked prelicensure baccalaureate nursing programs were selected based on three national college rankings services. Based on data from interviews and publicly accessible documents, seven case studies were compared and …

The Effect Of Osmotic Stimulation Of Copeptin On Glucose Metabolism In Healthy Adults, Lisa Tjorven Jansen

Graduate Theses and Dissertations

Diabetes is currently affecting 30 million Americans. To combat disease onset, lifestyle interventions have been focused on. Low water intake, alongside elevated concentrations of circulating copeptin, has been linked to increased risk for. However, it is unknown whether this effect on glucose regulation is acute or chronic. Furthermore, no study to date assessed the effects of copeptin independent of the renin-angiotensin-aldosterone system (RAAS). Purpose: The purpose of these studies was therefore two-fold: 1) to establish high endogenous copeptin concentrations independent of RAAS, and 2) to assess glucose metabolism following a standardized oral glucose tolerance test (OGTT) during high concentrations of …

Teacher Diversity Issues Among Hispanics And English Language Learners (Ells): Perspectives Of Administrators And Teachers In A Mid-South Town, Samantha Juncia Julien

Graduate Theses and Dissertations

Although the English Language Learner (ELL) student population is steadily increasing, the American teaching workforce remains mainly white and monolingual. This sector has yet to reflect the change in ELLs and teachers of color, who will be able to adequately provide culturally responsive instruction to these students. There is an urgent need to recruit and train teachers in culturally responsive pedagogy with the purpose of providing educational, cultural and social supports for the growing ELL population in the country (Farahnaz, 2012). Because of this, the American educational system is revamping some of its earlier pedagogical approaches, including the introduction of …

Promise And Practice: Toward An Expanded, Integrated, Collaborative Narrative On American Indians In Our National Parks, Bethany Hope Henry

Graduate Theses and Dissertations

Managed by the National Park Service, the Trail of Tears National Historic Trail, established in 1987, was developed to preserve physical segments of land and water routes, but also sites of memory such as unmarked graves and internment camps. Because the foundation of the national trail was the result of successful partnership of Cherokee grassroots efforts and multiple trail and federal advocates, the evolution of that collaboration merits consideration after thirty years to evaluate the application of standards for consultation, co-management, and heritage tourism. While the national trail preserves and marks the various routes, this study examines how three national …

Testing Measurement Invariance In Multilevel Data With Unequal Cross-Level Factor Structures, Lihua Yang

Graduate Theses and Dissertations

The test of measurement invariance (MI) investigates whether observed items measure a construct in the same way across different groups or over times. Examining MI is a prerequisite for multiple group comparisons in psychological tests (Schmitt & Kuljanin, 2008). With the prevalence of multilevel data in educational research (e.g., students nested within schools), establishing MI across multiple groups or waves of nested data has brought increasing attention. Two popular techniques for the test of multilevel MI include the multiple-group multilevel confirmatory factor analysis (MMCFA) and the design-based approaches. The MMCFA approach estimates sample covariance matrices at different levels separately. The …

Analysis And Conservation Of Native Forests At Kessler Mountain Fayetteville, Arkansas, Alan James Edmondson

Graduate Theses and Dissertations

Kessler Mountain in Fayetteville Arkansas has long been recognized for its beauty and natural resources. Parts of Kessler Mountain have been homesteaded and developed in the past, but most of the mountain has remained relatively undisturbed. The planned development of over 4,000 housing units to cover Kessler Mountain stimulated controversy and consideration of other management alternatives. A twist of fate involving an economic recession, a dedicated group of outdoor recreation enthusiasts, and environmental conservationists led to the permanent protection of 384 acres in the Kessler Mountain Regional Park. To help evaluate the natural resources at Kessler Mountain, forest composition, structure, …

An Investigation Of Preservice Teachers’ Knowledge Of Diversity And Multicultural Literature At One University, Rebecca Yeager

Curriculum and Instruction Undergraduate Honors Theses

The research study surveyed students classified as Juniors at the University of Arkansas currently enrolled in the Children’s Literature course, a required class for both Elementary Education and Childhood Education degree program students attending the University of Arkansas. The survey that was administered is the Cultural Diversity Awareness Inventory (CDAI). Additional data collected consisted of observations and interviews of students enrolled in the course. The research lasted one semester and consisted of multiple components. Through the study, the data suggests students grew in their knowledge of multicultural concepts and multicultural literature, but their growth was better measured through interviews, not …

The Effects Of A Literacy-Based Mentoring Program On Empowering Preadolescent Girls In Their Development Of Confidence, Self-Concept, And Leadership Skillset, Sophia Vincent

Curriculum and Instruction Undergraduate Honors Theses

This study focuses on empowering preadolescent girls to develop confidence and move from a fixed to growth mindset, take responsibility for their actions, turn failures into learning opportunities, and cultivate a love for self. GIRLS: Leaders on the Rise is a literacy-based mentoring program for preadolescent girls designed to improve confidence, positive self-concept, and develop a leadership skillset through five targeted aspects of leadership: growth mindset, integrity, resilience, love and loyalty, and strengths. Adolescence is a time when students are discovering who they are and shaping their identities. Girls decline in their self-confidence during adolescence due to fear of failure, …

Differences In Kaplan Integrated Exam Scores Based On Institutional Factors, Lee Ann Danner

Graduate Theses and Dissertations

Registered Nurses constitute the largest health care occupation in the United States. Current entry-level education for the profession of nursing is either an Associate Degree in Nursing (ADN) or Bachelor of Science in Nursing (BSN) (Altman, 2011). After successful completion of a nursing program, all nursing graduates must apply to take the National Council Licensure Examination (NCLEX-RN). The pass rate for first time United States educated NCLEX-RN exam test takers in 2017 was 87.11% leaving 12.89% unsuccessful (NCSBN, 2018). A nursing programs quality and recruitment are often influenced by a students’ ability to pass the NCLEX-RN on the first attempt. …

Will-Independent Mereological Trinity Monotheism: A Defense Of The Logical Coherence Of, A Priori Motivation For, And A Particular Model Concerning The Doctrine Of The Trinity, Andrew Kirschner

Graduate Theses and Dissertations

The doctrine posits that God is one being, but three persons. The orthodox parameters for affirming the Trinity are found in the early Ecumenical Creeds of Christendom, especially the Nicene and Athanasian Creeds. Four primary affirmations emerge as a summary of the essential content of the doctrine: (ONE): There is one God; (THREE): The Father, Son, and Holy Spirit are distinct divine persons; (FATHERSOURCE): The Father is the source of the Son and the Holy Spirit (perhaps with the Son, perhaps not); and (EQUALITY): The three persons in the Trinity are ontologically equal; none is greater than any of the …

The Perceived Occupational Benefits Of Competing In Technical Collegiate Competitions, Trenton James Lindbloom

Graduate Theses and Dissertations

Today’s workforce is more complex and demanding than ever before. In order to compete in today’s job market, students need to be equipped with complex problem solving skills and hands-on experience before graduation. While the formal classroom provides knowledge in basic skills and in some cases hands-on learning, this may not be enough to be competitive in industry. Students need to be engaged in practical situations in order to improve communication, acquire leadership abilities, and learn to work with others to solve problems and apply critical thinking skills. These skillsets are required by industry to be a productive employee in …

Does Grit Matter? A Correlational Study Of The Relationship Between Grit-S Assessment Scores And Student Retention In Undergraduate Online Programs, Kay Best Murphy

Graduate Theses and Dissertations

Historically, colleges and universities have used intelligence-based admissions tests to select students who demonstrate the intelligence to succeed academically. These institutions also have employed strategies to help students stay in school and graduate. However, despite tests and support strategies, the National Center for Education Statistics in 2018 reported a six-year completion rate of about 60% of first-time, full-time bachelor’s degree-seeking students for the 2010 cohort, including both traditional and online students. One study shows retention in online classes can be 10% to 15% lower than in traditional face-to-face courses (Carr, 2000). Meanwhile, higher education institutions today face increasing pressure to …

Monstrous Mobility In Dr. Jekyll And Mr. Hyde And Dracula, Autumn Danielle Weese

Graduate Theses and Dissertations

This thesis explores Late Victorian Gothic texts that are central to theories on monstrosity in terms of mobility by examining Dr. Jekyll and Mr. Hyde and Dracula. The goal of this project is to survey the ways in which two exemplary monsters, Mr. Hyde and Count Dracula, promote mobility for others and themselves as an inherent part of their monstrosity. The variety of this mobility is demonstrated by examples showing how monsters move and encourage movement in ways that are social and transformative as well as physical. Because social mobility is essential to these movements, this study also considers the …

Positioning Of English Language Learners And Its Power On Classroom Learning Opportunities And Interactions, Hawraa Nafea Hameed Alzouwain

Graduate Theses and Dissertations

In this qualitative study, the researcher investigated four aspects of positioning used by teacher and ESL students in a mid-south state of the United States. This study was based on the Positioning Theory of Davies and Harré (1990). The study aimed to explore various types of positioning used by the participants and how they impacted social interactions among the students and between them and their teacher. The researcher used four questions to outline the scope of the research, focused on: 1) how ELLs’ different positioning in the ESL classroom promoted or limited their learning opportunities; 2) how the ELL teacher …

Feedforward And Feedback Signals In The Olfactory System, Srimoy Chakraborty

Graduate Theses and Dissertations

The conglomeration of myriad activities in neural systems often results in prominent oscillations. The primary goal of the research presented in this thesis was to study effects of sensory stimulus on the olfactory system of rats, focusing on the olfactory bulb (OB) and the anterior piriform cortex (aPC). Extracellular electrophysiological measurements revealed distinct frequency bands of oscillations in OB and aPC. However, how these oscillatory fluctuations help the animal to process sensory input is not clearly understood. Here we show high frequency oscillations in olfactory bulb carry feedforward signals to anterior piriform cortex whereas feedback from the aPC is predominantly …

Development And Evaluation Of Selected Chemoprophylaxis Candidates And A Candidate Live-Attenuated Vaccine For Prevention Of Histomoniasis In Turkeys, Lesleigh Beer

Graduate Theses and Dissertations

Histomoniasis, commonly known as blackhead disease, has increased in prevalence due to the regulatory ban of prophylactics and therapeutics within the past 30 years. The objective of this thesis was to evaluate the efficacy of selected dietary chemoprophylaxis candidates as well as an in vitro live-attenuated vaccine candidate Histomonas meleagridis for prevention of histomoniasis. Chapter one addresses deoxycholic acid and a biliogenic diet intended to endogenously increase production of this secondary bile acid. Deoxycholic acid was effective in vitro but failed to prevent histomoniasis when evaluated during the in vivo experimental disease trial with turkeys. The biliogenic diet did not …

Leadership Succession And Onboarding Processes Of: Mid-West United States International Baccalaureate (Ib) Primary Years Program (Pyp) Schools, Mary Nandra Kay Campbell

Graduate Theses and Dissertations

The International Baccalaureate (IB) Primary Years Programme (PYP) model of education is unique and comprehensive, and so is the PYP principal. This qualitative study examined the perceptions of Mid-West United States IB PYP leaders related to leadership succession, the onboarding processes experienced by the new leaders, and the effective leadership traits possessed by the new leaders. This study involved a phenomenological study in nature. A criterion sampling approach was used to identify six participants of the study. A semi-structured interviewing protocol allowed elaboration by participants and to discover aspects not originally considered. The key findings included the following: lack of …

Reducing The Risk: Psychological And Technological Approaches For Improving Handwashing Practices In The Foodservice Industry, Jeffrey Allan Clark

Graduate Theses and Dissertations

As Americans are spending greater portions of their dollar on food consumed outside the home, the foodservice industry plays more of an integral part of daily existence compared to previous generations. Given the numerous annual foodborne illness outbreaks that threaten human lives while undermining confidence in the food supply, food safety is a pertinent issue for industry stakeholders, government regulators, and consumers. Food worker handwashing reduces the risk of foodborne illness transmission, yet compliance with this simple behavior is a complex problem. This dissertation addresses, predominantly, the issue of sub-optimal handwashing practices through applying psychology and technology, including wearable computers …

Daily To Seasonal Moisture Signals Present In Sub-Annual Tree-Ring Data, Ian Howard

Graduate Theses and Dissertations

In recent decades, there has been an increase in the development of sub-annual earlywood (EW) and latewood (LW) width tree-ring chronologies that have been used to make long-term inferences about discrete seasonal moisture variability for different regions of North America. This doctoral research developed a new network of EW, LW, and adjusted latewood (LWa) tree-ring chronologies from the western Great Plains. These chronologies were used to reconstruct 300+ years of spring and summer moisture variability over the northern and southern Plains. The reconstructions document new information about the long-term seasonal climate history of the Great Plains, including the unusual nature …

Political Speech On Twitter: A Sentiment Analysis Of Tweets And News Coverage Of Local Gun Policy, Mohamed Lemine M'Bareck

Graduate Theses and Dissertations

While the gun debate has been one of America’s most politically contentious issues, Twitter has become, in recent years a popular venue for politicians to carry out the debate. The present thesis is aimed at better understanding of political speech on Twitter, as well as the ways in which political frames and sentiment on Twitter differ from those of news media coverage regarding gun policy in the state of Arkansas.

The study uses framing theory, which assumes that both news media and individuals use frames to construct perceptions and narratives about issues. Adopting an automated content analysis as a method, …

Identifying Predictors Of Organizational Commitment Among Community College Faculty Members In Arkansas, Chris Aaron Lorch

Graduate Theses and Dissertations

Community colleges serve an important function of allowing students to achieve an affordable education closer to home. However, these opportunities often challenge community college faculty members due to smaller budgets and resources, which leads to differentiation in curriculum delivery, underprepared students, increasing workloads, and increasing stakeholder expectations. As such, across the nation, faculty are showing lack of commitment, lowered engagement, and increasing turnover rate. This study sought to determine the predictors of organizational commitment in community college faculty, using Meyer and Allen’s framework of three components of this commitment. Both individual demographic characteristics of faculty, and institution characteristics of degree …

Feeling Clumsy, Feeling Alien: Gender And Affect In Victorian Sensation Fiction, Gracie Mae Bain

Graduate Theses and Dissertations

“Feeling Clumsy, Feeling Alien: Gender and Affect in Victorian Sensation Fiction” explores the interactions between the shock of reading sensation fiction and the affective potential of the genre using Sara Ahmed’s definition of the killjoy and the affect alien. The sensation genre, as explained in its name, is potentially useful when thinking about affective ties in the Victorian period. The first chapter, “Tracing Sensations: Finding and Following the Killjoy” explores the affective footwork that readers of sensation fiction are asked to perform in their sympathetic process with the female villains and fallen heroines. Affective tools employed by sensational fiction create …

“A Woman’S Story”: Lady Macbeth And Performing Femininity In The Early 1600s – Late 1900s, Phyllis Lebert

Graduate Theses and Dissertations

This paper uses gender studies to understand the themes of gender performance further, and more specifically, femininity, in Shakespeare’s Macbeth. It also explores the many ways feminine gender performance has changed as society has changed. Thus, proving gender is performative rather than innate. It does this by examining first the text within the context of Elizabethan society. Moreover, by examining three pivotal performances of Lady Macbeth through history within the context of their social structures as well. The three performances are that of Sarah Siddons in the Late 18th Century, Ellen Terry in the 19th Century, and Judy Dench in …

Asynchronous Circuit Synthesis Using Multi-Threshold Null Convention Logic, Nicholas Renoudet Mize

Graduate Theses and Dissertations

As the demand for an energy-efficient alternative to traditional synchronous circuit design grows, hardware designers must reconsider the traditional clock tree. By doing away with the constrains of a clock, asynchronous sequential circuit designs can achieve a much greater level of efficiency. The utilization of asynchronous logic synthesis flows has enabled researchers to better implement asynchronous circuit designs which have been optimized using the same industry standard tools that are already used in sequential synchronous designs. This thesis offers a new flow for such tools which implements the MTNCL asynchronous circuit architecture.