Digital Commons Network^™

Identification And Development Of The Support Needs In Nematology For Arkansas Cooperative Extension Personnel, Mia Gentry

Graduate Theses and Dissertations

County extension agents are vital to the land-grant university system and are responsible for transferring current, research-based knowledge from the university to the community. In-service training allows agents the means to maintain a current, sound knowledge base. Needs identified by leading nematologists led the researcher of this study to assess if nematology education was a topic that warranted in-service training development for Arkansas Cooperative Extension Service (CES) agents. The researcher also assessed agents' comfort level with job related technology. Of the respondents, 67% identified general knowledge of plant parasitic nematodes necessary to meet the needs of their clientele. Findings from …

Essays In Pro-Social Behavior, Joshua R. Foster

Graduate Theses and Dissertations

This dissertation examines individuals' actions to improve social outcomes when unrecoverable investments are necessary. Situations involving non-pecuniary and pecuniary investments are considered. In the former, the prerequisite of real effort - a non-pecuniary, unrecoverable investment - is examined when said effort determines an individual's ability to procure their preferred social outcome. Theoretical predictions over an individual's effort provision are based on their revealed preferences for the social distribution of wealth according to the general axiom of revealed preference (GARP). Laboratory experiments reveal that individuals' effort provisions do not support the assumption of stable preferences (transitivity) of wealth distribution. Specifically, individuals …

Overcoming Roadblocks In Introducing Virtual World Technology To High Schools, Casey Dylan Bailey

Graduate Theses and Dissertations

The EAST (Environmental And Spatial Technology) Initiative is a non-profit educational organization that provides students in over two hundred schools in eight states with access to advanced computing technologies for the purpose of enabling students to develop technical skills early and to produce solutions to local community problems. Although many high-end technologies are available through EAST, they are desktop solutions that individual students use and there are none that enable students within a school or between schools to collaborate.

This thesis is a saga that documents the identification and removal of many roadblocks to introducing a 3D multi-user virtual simulation …

Effects Of Breathing Cool Air During Cycling Exercise In The Heat, Christian B. Ridings

Graduate Theses and Dissertations

INTRODUCTION: The purpose of this study was to establish the ability of the Core Cooler device to prevent rises in physiological heat strain of trained male cyclists during cycling exercise in the heat. METHODS: 15 healthy male cyclists cycled at 50-70% VO2max for 75 minutes in a heat chamber of 31°C & 55% RH while breathing through the Core Cooler device under three different conditions: 1:4 ratio without ice termed control (CN), 1:4 ratio with ice termed low intermittent (LI), and at 1:1 ratio with ice termed high intermittent (HI). Data collected every 15 minutes assessing intestinal temperature (TGI), heart …

Multistage Accelerated Reliability Growth Testing Model And Data Analysis, Leiying Jiang

Graduate Theses and Dissertations

Accelerated reliability growth testing has recently received a renewed interest in reliability engineering. The concepts of accelerated testing and reliability growth individually have been used in a variety of applications, either for hardware systems or software systems. The advantage of using a combined strategy is that it could shorten the testing time while maximizing the reliability. In the literature, there are many references related to optimal test design for reliability from either a component level or a system level. In this research, we suggest an approach which conducts accelerated testing at the component level while supporting estimates of reliability at …

Effects Of Parental Modeling On The Development Of Panic-Relevant Escape And Avoidance Among Adolescents: An Experimental Study Using A Biological Challenge Procedure, Liviu Bunaciu

Graduate Theses and Dissertations

Escape and avoidance behaviors play a prominent role in the maintenance of panic-spectrum difficulties and may also be implicated in the development of such problems. Although the current state of the literature regarding the etiology of these emotion-regulation strategies is relatively underdeveloped, it appears that learning experiences involving parental modeling of such behaviors may be instrumental in the development of panic-relevant escape and avoidance. Given that no tests of such a conceptualization exist at this time, the current study proposed an initial experimental examination of whether parental modeling of defensive reactivity during a well-established biological challenge could impact panic-relevant escape …

Emotional Interference Of Response Inhibition In Obsessive-Compulsive Disorder, Thomas Grover Adams

Graduate Theses and Dissertations

Researchers have hypothesized that failures of inhibition are partially responsible for habitual and perseverative symptoms that are unique to Obsessive-Compulsive Disorder (OCD). It is also well known that sequelae of emotional processes are also implicated in the etiology and maintenance of obsessions and compulsions. However, little research has tested how emotional processes moderate inhibitory functions in OCD. In the present study, high contamination phobic (HCP, n = 17) and low contamination phobic (LCP, n = 30) participants completed an emotional go/no-go task, which measured the interfering effects contamination-threat processing on action restraint. The present study had a two level between-subjects-quasi-independent …

Writing Apprehension Of Black Students At A Private Historically Black Four Year Liberal Arts Institution, John Wesley Mcallister

Graduate Theses and Dissertations

The purpose of this study was to determine the level of writing apprehension among first generation students at a Private Historically Black Institution. Participants were 103 college students from the central region of Arkansas at a Private Historically Black Institution of which 103 students responded to the survey completely. All of the respondents were administered the survey in four different sections of the freshman seminar courses. The survey consisted of a demographic section and the Writing Apprehension Test. The writing apprehension test was created by Daly and Miller (1975) to determine an individual's level of writing apprehension. Student's views, opinions …

Parent Management Training In Primary Care: Feasibility, Acceptability, And Preliminary Results, Debbie Gomez

Graduate Theses and Dissertations

This study explores the notion that brief interventions delivered in primary care can lead to positive outcomes in children with externalizing behavior problems. Study aims explored behavioral problem prevalence, whether caregivers found it acceptable to receive brief behavioral interventions following routine pediatric visits for identified behavioral problems, and whether it was feasible to deliver same-day services in a primary care setting. Additionally, preliminary data were provided regarding a small N randomized control trial conducted in a primary care setting. The trial utilized either a one-session intervention comprised of evidence-based Parent Management Training components or a supportive therapy intervention for children …

The Effects Of Combining Looping, Cognitively Guided Instruction, And Ethnicity: How They Can Collectively Improve Academic Achievement, Matthew Brandon Wilson

Graduate Theses and Dissertations

The purpose of this quantitative study is to gain an understanding of the powerful instructional potential of combining the practice of looping, Cognitively Guided Instruction (CGI) professional development strategies, and the impact these practices have in addition to ethnicity in elementary education. The study focused on research questions pertaining to student's Measure of Academic Progress (MAP) scores and the implementation of looping, CGI strategies, and how ethnicity impacted student achievement.

This study emphasizes two types of statistical tests to determine how significant CGI and looping practices impacted growth in mathematics on the MAP test for different ethnic groups. A Chi-Square …

Tall Tales: Editing Autobiographical Memories, Holly Elizabeth Cole

Graduate Theses and Dissertations

The impact of exaggerating when sharing an autobiographical memory with another person was investigated. Literature indicates that sharing an autobiographical memory serves a social function. However no research has investigated the impact that exaggerating when sharing specific memories has on this function. Research on lying suggests that deviating from the truth would cause the listener to like the speaker less. Research on what makes a good story indicates deviating from the truth could enhance the social benefits of sharing specific autobiographical memories by increasing the quality of the story. In Study 1, participants read scenarios of a person telling a …

Correlated Response To Selection And Effects Of Pre-Slaughter Environment On Meat Quality In Broilers Divergently Selected For Muscle Color, Isaac David Harford

Graduate Theses and Dissertations

Two broiler lines divergently selected for high (HMC) and low (LMC) muscle lightness (L*) were formed from a random bred control line (RBC). After eight generations of selection, three experimental trials were conducted to investigate the correlated response to selection and effects of pre-slaughter environment on meat quality in all three lines.

In the first experiment, a total of 100 birds from each line were bled for blood chemistry analysis and were evaluated for meat quality the following day. The HMC line had higher fillet drip loss (DL), L*, heterophil to lymphocyte ratio (H:L), and platelet count (Plt), and lower …

Paws In Prison: A Second Chance, Tiffany King

Graduate Theses and Dissertations

The documentary film Paws in Prison: A Second Chance takes an in-depth look at a program that has been incorporated in seven Arkansas prisons since 2011. Select inmates housed in these prisons are chosen to learn how to become dog trainers during their sentences. They spend 24 hours a day with dogs that were rescued from shelters where they may have been euthanized. This project incorporates interviews with inmates in the Paws in Prison program, wardens at the Maximum Security Unit and the Tucker Unit, and volunteers who spend time teaching inmates how to train and socialize their dogs. The …

From Graphite To Graphene Via Scanning Tunneling Microscopy, Dejun Qi

Graduate Theses and Dissertations

The primary objective of this dissertation is to study both graphene on graphite and pristine freestanding grapheme using scanning tunneling microscopy (STM) and density functional theory (DFT) simulation technique. In the experiment part, good quality tungsten metalic tips for experiment were fabricated using our newly developed tip making setup. Then a series of measurements using a technique called electrostatic-manipulation scanning tunneling microscopy (EM-STM) of our own development were performed on a highly oriented pyrolytic graphite (HOPG) surface. The electrostatic interaction between the STM tip and the sample can be tuned to produce both reversible and irreversible large-scale movement of the …

The Effects Of Persuasive Communication On Knowledge And Attitudinal Outcomes Of A Sexual Harassment Training Program, Corinne Marjorie Anton

Graduate Theses and Dissertations

Sexual harassment has been recognized as a prevalent issue leading to multiple negative consequences for victims and perpetrators. Efforts to reduce its occurrence and increase awareness are important. The majority of sexual harassment prevention programs evaluated have used knowledge-enhancing techniques in order to combat sexual harassment; however, results have not yielded a decrease in sexual harassment supportive attitudes. This study examined the effects of a sexual harassment training program that incorporated aspects of the elaboration likelihood model (Petty & Cacioppo, 1986) via manipulation of argument strength and source expertise. A pretest established participants' sexual harassment policy knowledge and attitudes. One …

The Quality Of Presence: An Essential Component Of Therapeutic Work, Melissa R. Haley

Graduate Theses and Dissertations

The concept of therapeutic presence has only recently been addressed in the literature. However the literature regarding this topic indicates that therapeutic presence is an important aspect of effective therapy (Boudette, 2011; Bradford, 2007; Greason & Cashwell, 2009; Hall-Renn, 2006; Nanda, 2009). As much of the literature is comprised of conceptual pieces, empirical data needs to be expanded on regarding therapeutic presence. One of the areas that is not addressed in the literature is how practicing counselors perceive or utilize presence The objective of this qualitative study was to gather information from a sample of expert counseling practitioners concerning therapeutic …

Comparisons Of Hydrogeologic Modeling Methods To Define Capture Zones For Public Water Supply Wells In Northern Arkansas, Paula Anderson

Graduate Theses and Dissertations

The usefulness, applicability, and practicality of more complex and resource consuming methods for groundwater modeling has been in question since computer based groundwater modeling was established (Anderson, 1992). In many situations, computer modeling of groundwater flow is a necessity and useful for extrapolating data where none exists or it is impossible or impractical to acquire. However, when delineating a recharge area around a public water well for protection purposes, it is unknown if more detailed computer modeling results are better than simpler hydrologic calculations and site study. In the case of public drinking water supply wells located in various aquifers …

Can Libertarianism Or Compatibilism Capture Aquinas' View On The Will?, Kelly Gallagher

Graduate Theses and Dissertations

The contemporary free will debate is largely split into two camps, libertarianism and compatibilism. It is commonly assumed that if one is to affirm the existence of free will then she will find herself in one of these respective camps. Although merits can be found in each respective position, I find that neither account sufficiently for free will. This thesis, therefore, puts the view of Thomas Aquinas in dialogue with the contemporary debate and argues that his view cannot be capture by either libertarianism or compatibilism and that his view offers a promising alternative view that garners some of the …

Assessing The Effectiveness Of Student Oriented Learning Outlines (Solos) In An Equine Classroom, Kathleen S. Jogan

Graduate Theses and Dissertations

This study determined if the use of the student oriented learning outline (SOLO) in a University of Arkansas equine production classroom had a positive influence in three areas: mastery of material taught, retention of material taught and voluntary positive student behaviors related to the use of course material. Thirty-one students who were enrolled in 2012 were in the non-SOLO group (control), and 25 students who were enrolled in 2013 were the SOLO group (treatment). Three separate units were taught to the treatment and control groups with only one difference: the treatment group was given a SOLO one week in advance …

Improving Adjunct Nursing Instructors' Knowledge Of Student Assessment In Clinical Courses, Kelly Vowell Johnson

Graduate Theses and Dissertations

Utilization of adjunct nursing instructors to teach clinical courses is a common occurrence in nursing programs. Adjunct clinical instructors are often expert clinicians, but they have limited experience in teaching and lack the expertise needed to be successful in the educator role, such as knowledge of student assessment. Faculty development programs that focus on student assessment can provide adjunct clinical faculty members with the necessary knowledge to become effective educators and ensure student, faculty, and program success.

The purpose of this study was to examine to what extent a faculty development workshop on evaluating students in clinical courses affected adjunct …

A Novel Cell Based Assay For Mmp Inhibitor Screening, Pantrika Krisanarungson

Graduate Theses and Dissertations

Up to date, a plethora of protein based materials are used as implants to stimulate tissue regeneration or fillers to alleviate tissue or organ impairment. This includes glottal insufficiency, urinary bladder incontinence and especially in cosmetic industrial to improve facial contour. Once in vivo, protein-based materials are decomposed by cell secreted matrix metalloproteinases (MMP) and lose their volume within months. By introducing MMP inhibitor (MMPI), the extent of material degradation over time may be reduced. In this dissertation, the development of cell-based assay capable of identifying MMPI candidates for protein-based implant lifetime prolongation is described. To visualize the degradation, DQ-gelatin, …

In-Season Drought Monitoring: Testing Instrumentation And Developing Methods Of Measurement Analysis, Tyson Brant Raper

Graduate Theses and Dissertations

Soil moisture sensor use in crop production systems has the potential to give inference on plant water status for the purpose of irrigation scheduling and site-drought characterization. These processed measurements could serve as the framework on which to compile trial results across locations, thereby more accurately defining varietal yield response to drought. Still, the ability to characterize drought within a given field or initiate irrigations from these data hinge upon the ability of the instrument to characterize soil moisture at the sampled point and extrapolate that information across the landscape and time. Therefore, the objectives of this research were to: …

A Christian Value?: Faculty Diversity At Southern Evangelical Campuses, Marquita Smith

Graduate Theses and Dissertations

This study explored institutional efforts to increase faculty diversity at three southern Christian universities and provided descriptions of what promoted or curtailed faculty diversity at those institutions. Daryl G. Smith's (2009) dimensions of diversity were used to evaluate the role of institutional missions, and how they were connected to diversity efforts. Smith's 2009 conceptual framework offered four areas for studying diversity: access and success, institutional vitality and viability, education and scholarship, and intergroup relations and campus climate. A qualitative multiple or collective case study design was used. The sample included 20 total participants; 19 from the three case institutions and …

Optimum Design Of Spectral Efficient Green Wireless Communications, Gang Wang

Graduate Theses and Dissertations

This dissertation focuses on the optimum design of spectral efficient green wireless communications. Energy efficiency (EE), which is defined as the inverse of average energy required to successfully deliver one information bit from a source to its destination, and spectral efficiency (SE), which is defined as the average data rate per unit bandwidth, are two fundamental performance metrics of wireless communication systems. We study the optimum designs of a wide range of practical wireless communication systems that can either maximize EE, or SE, or achieve a balanced tradeoff between the two metrics. There are three objectives in this dissertation. First, …

Nanofabrication Of Metallic Nanostructures And Integration With Light Detection Devices, Liang Huang

Graduate Theses and Dissertations

Metallic nanostructures have been investigated with various applications especially for integration with light detection devices. The incident light can be manipulated by those nanostructures to enhance light absorption therefor improve device performance. However, previous studies focused on optical design. The electrical properties of these integrated light detection devices have not been fully considered. The photon generated carriers transport and collection are critical for light detection devices as well. An optimized device platform considering from both the optical and electrical aspects to fully utilize these nanostructures is highly desired for future light detection devices.

This dissertation targeted on three objectives, beginning …

Nitrogen Management Practices And Colored Plastic Mulch Films Affecting Spider Mites And Aphids On Winter Strawberry In A High Tunnel, Kevin Philip Durden

Graduate Theses and Dissertations

Off season high tunnel strawberry production has the potential to augment income for Arkansas fruit growers during an unproductive time of the year, however management guidelines do not exist. At the University of Arkansas Agricultural Research and Extension Center in Fayetteville, AR studies were conducted to evaluate the effects of four nitrogen (46-0-0 urea fertilizer) fertigation rates (0.75, 0.50, 0.25, 0.0 kg N/day/ha) and red or black colored plastic mulch films on densities of twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), numbers of parasitized cotton aphids, and fruit yield weight. Foliar and …

Leadership In African American Politics: The Role Of President Obama On The Issue Of Same-Sex Marriage, Kevin Christopher Faulk

Graduate Theses and Dissertations

In 2008, African Americans overwhelmingly supported Senator Obama in his bid for the Presidency. Their supported averaged at 95% of African American voters. At the same time that Senator Obama was on the ballet, Prop 8 - legislation designed to amend California's Constitution to define marriage as between a man and woman - was passed with a large majority of African American support. Why did strong Democrats vote in favor of a law that most Democrats rejected? Previous research has concluded it was the role of the Black Church in African American politics that moves the community to a more …

Software Porting Of A 3d Reconstruction Algorithm To Razorcam Embedded System On Chip, Kevin Curtis Gunn

Graduate Theses and Dissertations

A method is presented to calculate depth information for a UAV navigation system from Keypoints in two consecutive image frames using a monocular camera sensor as input and the OpenCV library. This method was first implemented in software and run on a general-purpose Intel CPU, then ported to the RazorCam Embedded Smart-Camera System and run on an ARM CPU onboard the Xilinx Zynq-7000. The results of performance and accuracy testing of the software implementation are then shown and analyzed, demonstrating a successful port of the software to the RazorCam embedded system on chip that could potentially be used onboard a …

Cost-Benefit Analyses For Load Resistance Factor Design (Lrfd) Of Drilled Shafts In Arkansas, Sarah Michelle Bey

Graduate Theses and Dissertations

To achieve more cost efficient transportation infrastructure within the state of Arkansas, a series of cost-benefit analyses were performed. The analyses, specifically developed for load resistance factor design (LRFD) designed drilled shaft foundations, were designed to compare the fiscal impacts of the drilling and sampling, in-field and laboratory testing, full-scale load testing, and concrete mixing techniques utilized by the University of Arkansas (UofA), the Arkansas Highway and Transportation Department (AHTD), and the Missouri Department of Transportation (MODOT). The methodologies were compared at three test site locations within the state of Arkansas: Siloam Springs, AR, Turrell, AR, and Monticello, AR. These …

Phase Transformation In Monolayer Molybdenum Disulphide With And Without Defects Under Tension Predicted By Atomistic Simulations, Khanh Quoc Dang

Graduate Theses and Dissertations

In addition to its use as a solid lubricant, molybdenum disulphide (MoS2) has gained recent attention as a possible substitute for silicon as it is increasingly difficult to keep shrinking down electronic devices made of silicon, the conventional electronic material. When thinned down to atomic thickness, monolayer MoS2 possesses very unique and promising electronic and electrical properties. Unlike electronic and electrical properties, knowledge of the mechanical properties and role of structural defects on these properties of monolayer MoS2 is unexplored. For this thesis, the two main objectives are (1) to gain insight about the failure mechanism of monolayer MoS2 by …