Digital Commons Network^™

Economic Feasibility Of Aquaponics In Arkansas, Leah Ashley English

Graduate Theses and Dissertations

Concerns regarding population growth and resource scarcity have led to a recent renaissance of food production research. Over the past few decades, scientists have discovered new and innovative methods for growing food that, cumulatively, may hold the key to efficiently and sustainably feeding an ever-increasing world population. One method, known as aquaponics, has shown promise as being a sustainable solution for producing food locally in all parts of the world. Although many studies have shown aquaponic food production to be technically feasible, there are relatively few studies concerning the economic feasibility of aquaponics in various regions. To determine whether aquaponics …

Analysis Of Ac/Ds Activation Tagged Mutants In Tomato (Solanum Lycopersicum), Ipeleng Randome

Graduate Theses and Dissertations

Tomato (Solanum lycopersicum) is a crop of immense economic and nutritional importance worldwide and also a good model organism for genomic studies of other dicot species. The recent completion of the tomato genome sequence is a great milestone towards learning about the tomato genome. Elucidation of the function of the different genes using different functional genomic tools is therefore important in adding to this resource. To this end, we have developed an Ac-Ds transposon ‘activation tagging’ (ATag) system to be able to transpose transposon inserts, bearing a strong 35S-enhancer element, all around the genome. An Ac-Ds ATag construct was used …

School Counselors Lived Experience Of A Rampage School Shooting, Carleton H. Brown

Graduate Theses and Dissertations

Minimal research has been conducted to examine school counselors’ lived experiences of rampage school shootings. The purpose of this research is to increase school counselors’ knowledge and skills in responding effectively to such a crisis. A single-case qualitative dissertation study was completed at a rampage school shooting site, a middle school, and the immediate surrounding area in Bono, AR, located in the northeast part of Arkansas. School counselors’ decisions, perceived expertness, and lessons learned were investigated. Data collected included relevant research literature (including comparison research), archival records, direct observation, media reports, and interviews. Participants interviewed were individuals who lived through …

Utilization Of Weed Ecology, Tank Mixtures, And Application Technology To Improve Efficacy Of Herbicide Applications In Soybean, Christopher John Meyer

Graduate Theses and Dissertations

New herbicide-resistant soybean traits will increase the number of herbicides that can be applied in soybean and change the technology currently used to make herbicide applications in soybean. Palmer amaranth (Amaranthus palmeri) remains one of the most difficult weeds to manage in soybean and thus is the primary focus of this research. Therefore, experiments were conducted to investigate Palmer amaranth temporal emergence, control of common Arkansas weeds with new soybean herbicide programs, and the effect of application technology on dicamba-containing tank mixtures. Palmer amaranth emergence exceeded 400 plants m-2 for tillage treatments in 2013 and 2014, and tillage events typically …

At Home In Exile: Ezra Pound And The Poetics Of Banishment, Andy Kay Trevathan

Graduate Theses and Dissertations

Ezra Pound is one of the most important poets, critics, and writers of the 20th century. Through his literary efforts, and his work on behalf of many other writers, Pound changed the way we read and write poetry today. His cultivation and support of other writers and poets like T.S. Eliot, James Joyce, Robert Frost, Marianne Moore, etc. created the basis for what we refer to as Imagism, Modernism, and other important literary movements of the early 20th century. Pound’s use of fragmentation, pastiche, and bricolage laid the foundation for post-modern writers of the latter half of the 20th century, …

Disentangling Embodied Cognition: An Examination Of The State, Problems, And Possibilities Of Embodied Cognition, Cody Cash

Graduate Theses and Dissertations

Embodied cognition has received a fair amount of attention in philosophical, neuroscientific, and robotic research during the past several decades, yet the precise nature of its goals, methods, and claims are unclear. This dissertation will ascertain and examine the primary themes in the field of embodied cognition as well as why, and if, they offer significant challenges to traditional cognitive science models. Though many theories believe they are providing accounts that should replace traditional models, to do so they will have to overcome the very difficult challenge of arguing that mental content and capabilities derived from sensorimotor activity can continue …

Evaluation Of Bacillus Spp Candidates For Aflatoxin B1 Biodegradation In Broiler Chickens, Rosario Galarza Seeber

Graduate Theses and Dissertations

Poultry health has been traditionally maintained by hygenic measures, vaccinations, and the use of antibiotics. Modern husbandry management considers the use of probiotics as a natural way to protect birds against many everyday pathogens. Different strains of Bacillus spp. have proved to have beneficial effects in poultry production. However, the most used bacterium in commercial probiotics is Lactobacillus, a vegetative cell. In contrast, Bacillus spp are bacterial spores, highly resistant to harsh conditions, which makes them preferable, in some cases, to Lactobacillus because of shelf life and storage conditions. There is published information regarding mycotoxin detoxification by bacteria. Mycotoxins are …

Available Nitrogen And Denitrification In Soil Altered By Ground Cover And Nutrient Source In An Organic Apple Orchard, Jade Nicole Ford

Graduate Theses and Dissertations

A shift in public demand towards more organic and locally produced fruit and vegetables has been occurring across the United States in recent years. A common practice in organic fruit production is the application of organic ground covers to supply nutrients while enhancing other soil properties. A need for research exists in the southern region of the U.S. examining the effects of regionally applicable ground cover and nutrient management on nitrogen availability and the microbial community to provide information to organic farmers in the region. Two studies were conducted to determine how 12 treatment combinations of four ground covers (compost, …

The Decolonization Of Christianity In Colonial Kenya, Amanda Ruth Ford

Graduate Theses and Dissertations

Kenya was an unusual case within the larger narrative of decolonization in the British Empire. The presence of white settlers, the relative newness of the colony, and the particular way in which the British pursued the civilizing mission all combined to make the end of empire particularly violent for all parties involved. Independence in Kenya was precipitated by a bloody civil war, known as Mau Mau, and the imposition of martial law by the government for almost a decade. In the midst of this chaos, the Church of England’s missionary body, the Church Missionary Society worked to protect their converts …

Compounds Released From Biomass Deconstruction: Understanding Their Effect On Cellulose Enzyme Hydrolysis And Their Biological Activity, Angele Djioleu

Graduate Theses and Dissertations

The effect of compounds produced during biomass pretreatment on cellulolytic enzyme was investigated. Liquid prehydrolyzates were prepared by pretreating switchgrass using 24 combinations of temperature, time, and sulfuric acid concentration based on a full factorial design. Temperature was varied from 140°C to 180°C; time ranged from 10 to 40 min; and the sulfuric acid concentrations were 0.5% or 1% (v/v). Identified products in the prehydrolyzates included xylose, glucose, hydroxymethylfurfural (HMF), furfural, acetic acid, formic acid, and phenolic compounds at concentration ranging from 0 to 21.4 g/L. Pretreatment conditions significantly affected the concentrations of compounds detected in prehydrolyzates. When assayed in …

Satisfaction Of Graduates/Completers Of A Career And Technical Teacher Education In-Service Program: Professional Currency, Sho-Hsien Su

Graduate Theses and Dissertations

The purpose of this study was to evaluate the learning satisfaction of graduates or completers from the Career and Technical Teacher Education (CTTE) in-service program at a public university in the state of Kansas. The conceptual framework and the survey instrument were adapted from the Performance-Based Teacher Education learning packages and revised based on current educational situations, technologies, and terminologies to measure participants’ learning satisfaction. The participants included 96 career and technical education in-service teachers who had completed their degrees or certificates requirements from the CTTE in-service program between 2004 spring and 2015 summer. An on-line survey was administered by …

Production Of Ethanol From Cereal Food Fines Using Dilute-Acid Hydrolysis, Andrew Edward Arnett

Graduate Theses and Dissertations

Cereal food fines are a leftover by-product from breakfast cereal processing that is typically sold as animal feed or used as a pet food ingredient; however this product could be of greater value as a feedstock for the production of fuel ethanol via fermentation. In order for this material to be fermented it has to be broken down in to simple sugars using hydrolysis. One method of hydrolysis is called dilute-acid hydrolysis, whereby low concentrations of acid are added to the feedstock to facilitate the breaking of chemical bonds. This study investigates the effect of different concentrations of acid to …

Eicosapentaenoic Acid (Epa) From Porphyridium Cruentum: Increasing Growth And Productivity Of The Microalgae For Pharmaceutical Products, Maryam Asgharpour

Graduate Theses and Dissertations

One of the major nutritional requirements in our diet is an adequate intake of omega-3 specially eicosapentaenoic acid (EPA). In the present study, the effects of two temperatures (16°C & 20˚C) and light intensities (140 & 180µE/M2.S) and four nitrate levels (0.075, 0.3, 0.5 and 0.7g/L) on the cell growth and lipid productivity of Porphyridium cruentum, one of the most promising oil-rich species of microalgae, were investigated. A growth comparison was carried out using pure CO2 and 5% CO2/air. Additionally, the ratio of the fatty acids with omega-3 and omega-6 groups at various growth conditions were compared, since an appropriate …

Purkeys' 25 Year Journey, Ashleigh Brooke Galligan

Graduate Theses and Dissertations

The documentary film Purkeys’ 25 Year Journey takes an in-depth look at the Purkey’s family and the business they started in 1990. This 17 minute film focuses on Bruce Purkey and his daughter Robyn. They began Purkeys by supplying batteries, alternators and other parts of a heavy-duty vehicle’s electrical system to one customer, JB Hunt. As the company grew they began to be known across the nation for finding creative solutions to the electrical issues trucking fleets faced. Bruce led the team and received multiple patents for his innovations. In, 2010 Bruce’s son Justin Purkey joined the team and quickly …

Soybean Seed Quality And Vigor: Influencing Factors, Measurement, And Pathogen Characterization, Kimberly Ann Cochran

Graduate Theses and Dissertations

High seed vigor (SV), or the ability of seed to germinate and grow in a stressful environment is important, as many field emergence conditions are stressful for germination. Soybean SV can be affected by cultivar, seed storage environment conditions, the growing environment during seed development, crop management practices such as foliar fungicide applications, pathogens, and other factors. To assess the effects of some of these factors on soybean, the objectives of this work were to determine 1. the effect of cultivar and foliar azoxystrobin application on soybean yield, germination, vigor, microflora, and their relationships under harvest delay conditions; 2. if …

Traction-Separation Relationships For Hydrogen-Induced Grain Boundary Embrittlement In Nickel Via Molecular Dynamics Simulations, Wesley Allen Barrows

Graduate Theses and Dissertations

The deleterious effects of atomic and molecular hydrogen on the mechanical properties of metals have long been observed. Although several theories exist describing the mechanisms by which hydrogen negatively influences the failure of materials, a consensus has yet to be reached regarding the exact mechanism or combination of mechanisms. Two mechanisms have gained support in explaining hydrogen’s degradative role in non-hydride forming metals: hydrogen-enhanced localized plasticity and hydrogen-enhanced decohesion. Yet, the interplay between these mechanisms and microstructure in metallic materials has not been explained. Accordingly, for this thesis, the three main objectives are: (i) to develop a numerical methodology to …

A Morpho-Physiological Analysis Of Diverse Drought Resistant And Sensitive Rice Genotypes To Identify Distinguishing Anatomical Root Phenes, Clinton Philip Greub

Graduate Theses and Dissertations

A set of 37 genotypes selected from a survey of over 200 diverse germplasms, for their diverse drought tolerance mechanisms, were analyzed in this study for root physiological traits that are indicative of different drought resistance mechanisms. The genotypes include controls such as the drought sensitive IR64 and Nipponbare, along with the drought resistant Nagina 22 (N22) and Bengal landraces to identify distinguishing phenotypic features of resistant accessions. Anatomical traits studied include total areas of the cross-sections of the stele, cortex, aerenchyma, cortical-cell, and xylem tissue; the number of aerenchyma, xylem vessels, cortical cell file number and size that together …

The Fascination Of Manga: Cross-Dressing And Gender Performativity In Japanese Media, Sheena Marie Woods

Graduate Theses and Dissertations

The performativity of gender through cross-dressing has been a staple in Japanese media throughout the centuries. This thesis engages with the pervasiveness of cross-dressing in popular Japanese media, from the modern shōjo gender-bender genre of manga and anime to the traditional Japanese theatre. Drawing on theories from gender-studies and performance aesthetics to delineate the female gender in traditional Japanese theatre, I follow the roles of, representation of, and media for women, concentrating on (1) manga, a form of sequential art featuring illustrations with corresponding text, (2) anime, animated productions (where the word anime is the abbreviated pronunciation of “animation” in …

The Impact Of A Ballot Education Program On Arkansas Voters, Kristin Netterstrom Higgins

Graduate Theses and Dissertations

The University of Arkansas Division Of Agriculture’s Public Policy Center has educated Arkansas voters about statewide ballot issues for 10 years. The ballot issue education program, was evaluated during the 2014 election cycle to determine the program’s impact on voters. This descriptive study sought to describe program participants, to determine knowledge transfer of county agents, to describe knowledge acquisition of program participants, and to measure whether people who attended Cooperative Extension Service presentations made informed choices on Election Day. Researchers found that program participants were mostly older, educated, White women. There were increases in knowledge among participants who read fact …

The Effects Of Brand Familiarity On Perceived Risks, Attitudes, And Purchase Intentions Toward Intimate Apparel Brands: The Case Of Victoria’S Secret, Jennifer Lynn Rose

Graduate Theses and Dissertations

The purpose of this research was to examine the effects of brand familiarity on reducing consumers’ perceived risks in intimate apparel shopping, which in turn influence consumers’ attitudes and purchase intentions toward intimate apparel brands. To predict relationships among perceptions of risk and consumer behaviors, the present study adopted the perceived risk theory (Cox, 1976) and a modified version of the theory of reasoned action (TRA; Fishbein & Ajzen, 1975).

An online survey was conducted by recruiting adult females through a large Mid-Southern university in the U.S. Reliable and valid measures from previous research were adopted and modified to assess …

Perceptions Of Millennial Teachers' Commitment To Teaching As A Career, Deana Lyn Layton

Graduate Theses and Dissertations

Just like the childhood game of Hide and Seek, “Ready or not, here they come,” numbering 92 million strong, the Millennial Generation is the largest generational cohort in history. By 2025, it is predicted they will comprise 75% of the workforce. Millennials are highly educated, willing to learn, technologically advanced, and Socially conscious—all traits important for the making of a great teacher. The purpose of my study is to understand the mindset of six beginning Millennial teachers regarding teaching as their career of choice and how this mindset impacts their decision to remain committed to teaching. This study attempts to …

“Maybe It Was You”: The Implications Of Southern Gothic Elements Of Criminality, Sexuality, And Race In Truman Capote’S In Cold Blood, Shirley Ellen Rash

Graduate Theses and Dissertations

Truman Capote’s In Cold Blood is frequently the subject of critical analysis of its genre, its factual accuracy, and its style. Previous critical examinations of the text often briefly acknowledged the thematic connections between this text and Capote’s previous southern gothic work but do so without substantially delving into these similarities. For many, the text’s Kansas setting prevents the book from properly being considered southern gothic because Kansas is commonly perceived as the most quintessentially wholesome and American of states while the U.S. South is frequently deemed the site of taboo and undesirable activity. This thesis questions this dichotomy and …

The Technological Singularity: An Ideological Critique, Phillip Stephens

Graduate Theses and Dissertations

The Technological Singularity represents a confluence of techno-cultural narratives of progress in which the projected exponential growth of artificial intelligence and nanotechnology will usher in a moment of irrevocable change for the human race – a change that many claim is scant decades away. Although the concept saw its modern clarification by science fiction author Vernor Vinge, the Singularity sits astride both fictional and nonfictional narratives of the future. It is the aim of this study to explore the ideological discourses that emerge from texts on the Singularity and the unfathomable posthuman future it ushers in. Doing so reveals how …

Surface Modification Of Noble Metal Nanostructures Toward Biomedical Applications, Samir V. Jenkins

Graduate Theses and Dissertations

Noble metal nanostructures have seen a steady increase in biomedical application over the last several decades; new diagnostic and therapeutic modalities are under intense investigation. Many of these applications are possible because of post-synthetic modifications to the particle surface. These modifications take a variety of forms and can significantly affect the pharmacokinetics of these particles. In this work, various surface modifications were investigated. Particle agglomeration, which occurs when particle surfaces remain in contact, can significantly affect the toxicity and efficacy of a nanomedicine. Darkfield microscopy and single-particle ICP-MS were developed as complementary methods to detect agglomeration in blood, with the …

The Acclimation Processes For New, First-Time Presidents At Public, Master’S-Level Comprehensive Institutions: Lessons Learned, Mark Allan Kinders

Graduate Theses and Dissertations

The purpose of this study was to learn the acclimation practices of new, first-time presidents at regional, public comprehensive institutions. An original survey conducted from January through March, 2015, was completed by 61 new CEOs for a 59% response rate. They reported numerous activities that were helpful to learn their organization so as to become sufficiently comfortable in their understanding of campus culture, governance processes, operational practices, regional partners, and state policy climate to lead their organizations forward. With experience they learned that acclimation took longer than they expected. The study found higher rates of female or minority CEOs, and …

A Social Marketing Plan For The Arkansas Miracle League, Abby Stuart

Graduate Theses and Dissertations

Miracle League is a baseball league specially designed to allow disabled children, teens, and adults have the same opportunity to play baseball as able-bodied individuals on a field specifically designed to accommodate all disabilities. This thesis offers the Miracle League of Arkansas a specified Social marketing plan. In order to assist Miracle League in the acquisition of new players, volunteers, and donors, research was compiled and conducted to implement a successful Social marketing plan for the spring 2016 Miracle League season. This Social marketing plan gives Miracle League recommendations on how to appeal to parents of potential Miracle League players, …

Socially Constructing Drug Addicts From The Poor: A Critical Discourse Analysis, Kalynn Susan Amundson

Graduate Theses and Dissertations

Welfare drug testing was authorized by the Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) of 1996, and has subsequently garnered extensive legislative interest in numerous states. This policy raises several questions, which are the subjects of the two journal articles and one manuscript included in this dissertation.

The first article addresses the question of a possible confluence of War on Drugs and Welfare Reform policies as evidenced through welfare drug testing policy, and indicated by continuity in policymakers’ rhetoric. This study examines federal-level policymakers’ debate discourse in these two policy streams. The analysis finds themes of the Social pathology, …

Characterization Of The Effects Of Bfgf And Gsk3Β Inhibitors On Embryoid Bodies Derived From Human Pluripotent Stem Cells, Jonathan Earls

Graduate Theses and Dissertations

Embryoid body (EB) formation is a common first step in many human pluripotent stem cell (hPSC) differentiation protocols. Previous work suggests that EBs are sensitive to growth factor withdrawal if they are derived from hPSCs maintained in feeder independent media such as mTeSR1. To promote cell survival, EBs generated from mTeSR1-adapted hPSCs are sometimes cultured in a medium that contains basic fibroblast growth factor (bFGF), a trophic factor often used in hPSC cultures to maintain self-renewal. This distinguishes feeder independent hPSCs from feeder dependent hPSCs. The purpose of this study was to characterize the effects of bFGF as well as …

In Vitro Microdialysis Sampling Collection Of Volatile Organic Compounds (Voc's), Dodecafluoropentane (Ddfp) And Isoflurane, Valerie Shannon Mckinney

Graduate Theses and Dissertations

Death by stroke occurs every four minutes to human beings. Strokes cause necrosis within the tissue of the brain due to deprivation of oxygen. Perfluorocarbons have the ability to transport oxygen to tissue and in return decrease cell death. Dodecafluoropentane (DDFP) is a volatile fluorocarbon and collection in vivo can be a challenge since this compound evaporates at room temperature. There is currently not an efficient collection method in vivo for compounds that are volatile. Without a method to collect DDFP it is impossible to be approved for clinical use since exact concentrations of the drug within the body will …

Intangible Benefits Of Team Identification, And The Factors Which Generate It, Toward Intercollegiate Athletic Programs In Students' College Adjustment, Junmo Sung

Graduate Theses and Dissertations

Intercollegiate athletic programs have been used to facilitate Social interactions between students within the complex nature of the college environment. In particular, many researchers have discussed the benefits of intercollegiate athletic programs in higher education, examining positive aspects of team identification such as the enhancing sense of belonging, personal self- esteem, happiness, and decreasing stress, anxiety, depression, and loneliness in Social life. With the benefits of the program, it is important to scrutinize the benefits of intercollegiate athletic programs in students’ college adjustment in higher education. Therefore, the goal of this dissertation was to provide better understanding of the intercollegiate …