Digital Commons Network^™

Why Career And Technical Education Teachers Contribute Intellectual Capital To Open Education Repositories: A Case Study, Kelley J. Manley

Graduate Theses and Dissertations

High quality Career and Technical Education (CTE) teachers are necessary in order to prepare students to fill the gap in the nation’s technical workforce. Technical skills taught by high school CTE teachers assist students as they continue their education in post-secondary technical schools. Post-secondary CTE teachers assist students in their preparation for future high-wage, high-demand technical careers. One of the many challenges reported by CTE teachers is the time-consuming development of relevant curriculum. The open education resource (OER) movement has been reported in research to alleviate some of these challenges for teachers, but research is lacking in the area of …

Effects Of Task Clarification And An Adaptive Computer Software On Implementation Of Mand Training Using An Ipad® As A Speech Generated Device, Ashley Mckenzie Parnell

Graduate Theses and Dissertations

Mand training is an evidence-based instructional method and a primary focus in behavioral language training for children with autism. A rapidly growing research base supports manding training using hand-held computing technologies (e.g., iPad®, iPod®) as speech generating devices (SGD) for establishing a manding repertoire in children with autism. To ensure optimal learning efficacy and efficiency, procedures must be implemented with high levels of accuracy, which requires that staff be well-trained. However, research evaluating methods for training staff to implement mand training procedures with the iPad® and application Proloquo2Go™ as an SGD has not yet been conducted. Therefore, this study examined …

Efficacy Of Natural Compounds With Novel Carrier Systems For Controlling Campylobacter Jejuni In Post-Harvest Poultry, Sandip Shrestha

Graduate Theses and Dissertations

Campylobacter jejuni, a leading cause of bacterial gastroenteritis worldwide, is strongly associated with the consumption and/or mishandling of raw contaminated poultry products. Thus, interventions aiming to reduce C. jejuni counts on poultry products could greatly reduce the incidence of human campylobacteriosis. In the first study, the efficacy of a generally recongnized as safe (GRAS) compound, carvacrol (CR; derived from oregano oil), as an antimicrobial wash treatment to reduce C. jejuni on chicken skin was evaluated. Three delivery systems of CR: suspension, emulsion and nanoemulsion were used. C. jejuni counts were reduced up to 4 log10 cfu/sample by 2% dose of …

Evaluating Climate Change Policy Through The Endangered Species Act, Richie Donahou

Graduate Theses and Dissertations

This research sets out to address a growing knowledge gap of climate change science in regards to the state of Arkansas. Within the coming chapters, the goal of this research is to examine climate data and to identify if any evidence of climate change can be detected and what are the policies in place to adapt to these potential changes. Furthermore, the scope of this research will be narrowed to a few counties over the southwest Arkansas, and a specific endangered species, the Leopard Darter. Upon examination of previous environmental and ecological climate change related research it became clear that …

Aiding Growers’ Decisions: Describing Arkansas Blackberry Growers’ Resources And Needs Regarding Blackberry Production, Lesley Marie Smith

Graduate Theses and Dissertations

This study was a census of blackberry growers who attended the Blackberry Growers Association informal interest meetings held throughout the state during the month of April. The purpose of this study was to describe blackberry operations in Arkansas, describe the ideal blackberry cultivar growers want to produce, describe resources they use to research production information, and describe what changes to current resources growers would like to have. Questionnaire responses regarding blackberry production of 18 blackberry growers in the state of Arkansas were analyzed. Three growers elected to not participate resulting in an 86% response rate. The researcher hopes that this …

Anti-Inflammatory Activity Of Phenolic And Volatile Compounds In Cranberries (Vaccinium Macrocarpon L), Katherine Moore

Graduate Theses and Dissertations

The primary objective of this study was to compare the anti-inflammatory effects of phenolic and volatile compounds extracted from cranberries. The Griess Reagent System assay was used to measure the in vitro anti-inflammatory capabilities of cranberry phenolic and volatile extracts on RAW 264.7 mouse macrophage cells. This study tested the anti-inflammatory capabilities of the cranberry phenolic and volatile extracts before, as a preventative treatment, and after, as a means of treating pre-existing inflammation, inducing inflammation with lipopolysaccharide (LPS). All experiments were conducted in the following manner, varying only in whether treated with the extracts before or after LPS: 1 x …

Mixed Method Analysis Of Apparel Corporations For Future Policy Development, Lance Michael Cheramie

Graduate Theses and Dissertations

This study focused on analyzing the gaps and inconsistencies in sustainability reporting by conducting a needs assessment on 14 apparel retailing corporations. An analysis for new public policies that would enhance the sustainable efforts by apparel retailing corporations were explored. Additionally, the efficiencies of current sustainable practices were analyzed and the current trends were reported. This study provided a comprehensive review of apparel retailing corporations’ interest towards governmental support in developing policies for efficient sustainability practices and for standardized reporting.

A mixed methods approach was used with the primary focus being the evaluation of emission reduction, governmental influence, sustainability reporting, …

Bioavailability Of Bioactive Compounds, Wing Shun Lam

Graduate Theses and Dissertations

Arachidin-1 (Ara-1) and arachidin-3 (Ara-3) are stilbenoids found in hairy peanut roots, which have been shown to possess similar, if not higher, efficacy in biological activities when compared to nonprenylated analogs such as piceatannol and resveratrol. Blackberry essences are concentrated volatiles, which are characterized by low molecular weight, lipophilic properties, and have also been demonstrated to have health benefits. As interest in dietary bioactive compounds functional ingredients increase, more emphasis has been placed on identifying which compounds have high efficacy as well as bioavailability. The ability of a compound to exert its health promoting effects depends on its bioavailable dose, …

Flow Regime Influences On Stream And Riparian Soil Carbon Dynamics In The Ozark Highlands And Boston Mountains Of Arkansas, Allyn Dodd

Graduate Theses and Dissertations

The natural flow regime exerts primacy over lotic ecosystem patterns and processes. However, little work has examined the influence of flow regime on instream and riparian carbon (C) dynamics in minimally-impacted, temperate forested systems. To date, most research efforts have focused on characterizing C movement and transformations across biomes and land use categories; however, flow regime represents an overlooked, finer level of detail that may drive differences in ecosystem function. My dissertation objective was to measure C fixation and movement within and across multiple environmental spheres (e.g. within stream channels, between stream surfaces and the atmosphere, and from riparian soils …

“There Goes That Relationship”: Journalistic Aggression And Political Equivocation In Joint Press Conferences, Nichole Anne Russell

Graduate Theses and Dissertations

This study evaluates the relationship between the press and political leaders during joint press conferences. Aggressive journalistic questioning in press conferences has increased over time (Clayman & Heritage, 2002; Clayman, Elliott, Heritage, & McDonald, 2004; Clayman, Elliott, Heritage, & McDonald, 2007), but recent scholarships shows that journalists present less aggressive questions when a foreign head of state is present (Banning & Billingsley, 2007). Joint press conferences hosted in the United States by President Donald Trump between Prime Minister Theresa May of the United Kingdom, Prime Minister Justin Trudeau of Canada, Prime Minister Benjamin Netanyahu of Israel, and Chancellor Angela Merkel …

Investigation Of Bacterial Taxa As Biomarkers Of Fescue Toxicosis And Heat Stress In Grazing Beef Cows, Sarah Katherine Chewning

Graduate Theses and Dissertations

Fescue toxicosis in grazing beef cattle is caused by consumption of Ergot alkaloids associated with tall fescue (toxic fescue) and is responsible for substantial economic loss to the U.S. beef industry. Cattle consuming toxic fescue suffer adverse physiological responses, such as: hyperthermia, increased respiration rate (RR), poor reproduction and growth performance. Other adverse responses to fescue toxins include the retention of a winter hair coat and vasoconstriction in the extremities, which can lead to tissue necrosis. Identifying cattle with reduced susceptibility to fescue toxins would allow for efficient use of fescue pastures; thus, the objectives of this thesis was to: …

Essays On Performance Implications Of Social Media For Established And Nascent Firms, Alireza Golmohammadi

Graduate Theses and Dissertations

The possibility of large-scale communication with stakeholders brought about by social media has made these new channels of communication an important arena for spending marketing budgets. Despite the increasing share of social media in firms’ marketing budget, there is significant heterogeneity in firms’ social media communication practices even within the same venue and among firms from the same industry. As such, there is need for more research on how firms can leverage social media to achieve better performance. In order to address this broad question, two essays have been designed and executed.

The first essay utilizes integrated marketing communication as …

Gold Nanoparticles For Stem Cell Delivery In Myocardial Infarction: Analysis Of Toxicity And Development Of A Cell Culture Platform For Use In An In-Vitro Model Of Mi-Associated Ischemia/Reperfusion, Jeffrey Curran Henson

Graduate Theses and Dissertations

In this work, the potential for PEGylated gold nanoparticles for use as a platform for stem cell delivery in treatment of myocardial infarction (MI) is preliminarily investigated. Cardiovascular disease is currently the leading cause of death worldwide, with majority of mortality resulting from coronary artery disease and associated MI. The ensuing ischemic conditions resulting from MI cause substantial heart muscle tissue loss and scarring in the heart. Adverse tissue remodeling creates a significant loss in heart function that can result in the formation of cardiac hypertrophy, ventricular dilation and arrythmias. The long-term prognosis of patients who have suffered MI is …

Estimating Watershed Mercury Contribution To Lake Fort Smith State Park, Arkansas, Usa, William Miles Harmon

Graduate Theses and Dissertations

Mercury contamination associated with human activities poses global human health and environmental risks. A fish-consumption advisory has been in effect at Lake Fort Smith in central west Arkansas for more than a decade due to observed methylmercury concentrations in fish tissue. Lake Fort Smith is an important municipal drinking water supply and recreational resource. Water samples from the majority contributing tributary stream, Frog Bayou creek, were collected periodically, under differing hydrologic conditions in order to quantify the allochthonous mercury load delivered to the lake. Temperature, specific conductance, and turbidity data were collected and used to estimate dissolved organic carbon, methylmercury …

Scattering Of Few Photon Fields By Two Level Systems In A One Dimensional Geometry, William Konyk

Graduate Theses and Dissertations

Recent experimental progress has realized strong, efficient coupling of effective two level systems to waveguides. We study the scattering of multimode photons from such emitters coupled losslessly to the confined geometry of a one dimensional waveguide. We develop novel techniques for describing the scattered state of both single and multi-photon wavepackets and explore how such wavepackets interact with arrays of emitters coupled to a one dimensional waveguide. Finally, we apply these techniques and analyze the capability of two particular systems to act as a quantum conditional logic gate.

Si-Based Germanium Tin Photodetectors For Short-Wave And Mid-Wave Infrared Detections, Thach Pham

Graduate Theses and Dissertations

The demand of light-weight and inexpensive imaging system working in the infrared range keeps increasing for the last decade, especially for civil applications. Although several group IV materials such as silicon and germanium are used to realize detectors in the visible and near infrared region, they are not the efficient approach for imaging system in the short-wave infrared detection range and beyond due to bandgap limit. On the other hand, this market is heavily relied upon mature technology from III-V and II-VI elements over years, which are costly to growth and incompatible with available Si complementary metal-oxide-semiconductor (CMOS) foundries. This …

A Case Study: Inclusion Of Student-Athletes Who Identify As Sexual Minority At An Ncaa Division I Institution, Megan Turk

Graduate Theses and Dissertations

In comparison to heterosexual counterparts, sexual minority student-athletes are two times more likely to experience harassment, more negative climates, report feeling deliberately ignored or excluded from team actives and are subjected to orientation-based derogatory marks via electronic means (Rankin & Merson, 2012). This particular population is 2-3 times more likely to experience anxiety and depression, nearly 14% will attempt suicide or acts of self-harm, and are more likely to abuse drugs and alcohol (Cunningham, 2015). Non-inclusive climates negatively affect academic and athletic performance (Wolf-Wendel, Bajaj, & Spriggs, 2008; Turk, & Stokowski, 2016; Cunningham, 2015). The Athletic Equality Index (AEI) measures …

The Relationship Between Mental Health And Ultra-Running: A Case Study, Joshua Justin Cook

Graduate Theses and Dissertations

This instrumental case study sought to explore the relationship between ultra-running and mental health through the lived experiences of a single participant who self-identifies as an ultra-runner. Three research questions were used to explore this relationship; how did the individual decide to participate in ultra-running, what aspects of ultra-running impact the participant’s mental health, and how has engaging in ultra-running impacted the participant’s mental health? The case study utilized three semi-structured interviews, two participant observations, video documentary review, and journaling to answer these questions. A thematic analysis of the data revealed four essential themes; 1) Development of participation, 2) Promotes …

Establishing Influence And Authority In Ancient Civilizations And Modern Politics: The Rhetoric Of Oracles And The Oracular Maneuvers Of Political Action Committees, Michel C. Lacrue

Graduate Theses and Dissertations

While most animals communicate in order to convey environmental information such as danger or where food is located, humans have evolved and developed an articulated language for a myriad of uses, and our language is the basis for how we shape and maintain reality. Language can be used to teach, express an attitude or affiliation to a group, and give us a sense of our state of being, but it can also be used to manipulate a narrative in order to gain power over others. This project argues that Political Action Committees (PACs), and the language that they use in …

Opto-Thermal Characterization Of Plasmon And Coupled Lattice Resonances In 2-D Metamaterial Arrays, Vinith Bejugam

Graduate Theses and Dissertations

Growing population and climate change inevitably requires longstanding dependency on sustainable sources of energy that are conducive to ecological balance, economies of scale and reduction of waste heat. Plasmonic-photonic systems are at the forefront of offering a promising path towards efficient light harvesting for enhanced optoelectronics, sensing, and chemical separations. Two-dimensional (2-D) metamaterial arrays of plasmonic nanoparticles arranged in polymer lattices developed herein support thermoplasmonic heating at off-resonances (near infrared, NIR) in addition to regular plasmonic resonances (visible), which extends their applicability compared to random dispersions. Especially, thermal responses of 2-D arrays at coupled lattice resonance (CLR) wavelengths were comparable …

Investigating The Potential Of Plant-Derived Antimicrobials For Controlling Campylobacter Jejuni In Poultry And Poultry Products, Basanta Raj Wagle

Graduate Theses and Dissertations

Campylobacter jejuni infection in humans is strongly associated with the handling and consumption of contaminated poultry products. Interventions reducing C. jejuni contamination in poultry would reduce the risk of subsequent human infections. In the first study, the efficacy of a Generally Recognized as Safe (GRAS) compound, eugenol (EG; derived from cloves), as an antimicrobial dip treatment to reduce C. jejuni in postharvest poultry was evaluated. The antimicrobial efficacy of EG was studied in suspension, emulsion and nanoemulsion delivery systems. EG suspension reduced C. jejuni counts with the greatest reduction of >2.0 Log CFU/sample for the 2% dose of EG (P

Comparative Microbial Community Dynamics In A Karst Aquifer System And Proximal Surface Stream In Northwest Arkansas, Josue Rodriguez

Graduate Theses and Dissertations

Northwest Arkansas has well-developed karst systems, with numerous sinking streams and springs. Karst conduits make it easy for contaminants to enter groundwater systems, degrading the water quality and destroying fragile karst ecosystems. With the increase of urbanization, potential threats in the form of fecal contamination may prove to be more of a problem. The purpose of this research is to compare the difference between microbial communities within two different settings, a karst aquifer and a surface stream. The microbial communities within Blowing Spring Cave and Little Sugar Creek were detected and identified in water and sediment samples. Samples were also …

Paulo Coelho: Transnational Literature, Popular Culture, And Postmodernism, Anna Pavlova Murta

Graduate Theses and Dissertations

With over 350 million books sold worldwide in more than 80 languages, Paulo Coelho is an international literary phenomenon that moves “beyond culture of origin” (Damrosch 199) and inhabits the “world literary space” (Pascale 281). Would his novels, therefore, stand as materialization of Goethe’s humanist cosmopolitan vision upon the coinage of the term world literature? Many cultural scholars would argue to the contrary. This dissertation aims at exploring Coelho narratives and their popularity and controversial reception by contextualizing them within the contemporary scholarship on World Literature and within the global cultural economy.

An underlying assumption of this Cultural Studies approach …

Introducing The Academic Discipline Of Agricultural Communications To The United Kingdom: A Needs Analysis, Sara Kathryn Maples

Graduate Theses and Dissertations

There is a current need to identify and describe opinions of prospective employers and current agricultural students about the prospects of developing an agricultural communications academic discipline in the U.K. An understanding of the competencies employers would expect of agricultural communications graduates, as well as an understanding of what students would expect to learn, would form the conceptualization and development of the discipline in the U.K. A total of 22 agricultural communications professionals and 67 agricultural students from across the United Kingdom completed the survey. Collected data showed agricultural students and agricultural communications professionals answers overall were not statistically different. …

The Private School Advantage: Evidence From School Vouchers And Educational Leadership, Mohammad Danish Shakeel

Graduate Theses and Dissertations

School choice is becoming increasingly popular around the globe. Broadly the term ‘school choice’ is used to describe the options available for families to send children to school(s) other than the one they are residentially assigned to. Private school choice interventions known as ‘school vouchers,’ offer public or private funding to enable families to send their children to private school.

Research in 1970s and 80s by James Coleman and his colleagues showed a private school advantage in student achievement and graduation rates, in comparison to traditional public schools. Competing evidence was presented by Christopher Lubienski and Sarah Lubienski in 2013, …

The Fault In Our Stars: A Director's Process On Life Is A Dream, Jeremiah Dean Albers

Graduate Theses and Dissertations

The following is a journal and reflection on my process as adaptor and director of the play Life is a Dream by Pedro Calderón de la Barca. It is equal parts self-evaluation and creative travelogue. The chapters include an Introduction, and The Production Process, and related appendices.

Communicating For Equality: How Inclusive Communication Affects Political Participation Within Local Communities, Kyle Chandler Worley

Graduate Theses and Dissertations

This study will examine the relationship among inclusive communication, sense of community belonging, and political participation within local communities. Communication from organizations such as local advocacy and local, mainstream media that contains content acknowledging relevant topics for lesbian, gay, bisexual and transgender (LGBT) community members. I explore ways that Communication Infrastructure Theory (CIT) can be applied to organizational inclusive communication’s influence on community marginalized members’ sense of community belonging and political participation. CIT has been applied to the study of racial and economic minority communities in past research in the past, but this study applies CIT to the study of …

Characterization Of A Variant Of Tuberous Sclerosis Complex 2 And Its Interaction With Rheb, Sowmya Sivakumar

Graduate Theses and Dissertations

Protein-protein interactions are vital in maintaining proper function and homeostasis in cells. Some signaling pathways are regulated by G-proteins that work like switches to activate and deactivate pathways. Mutations in these proteins, their effectors or the interaction between proteins may cause dysregulation of signals that can lead to many diseases.

Rheb, Ras homology enriched in brain, is a Ras family GTPase that is vital in regulation of the mTOR (mammalian target of rapamycin) pathway that signals cell proliferation and growth. Due to the low intrinsic GTPase activity of Rheb, a GTPase activating protein (GAP), Tuberous Sclerosis Complex 2 (TSC2) down …

Mumbai Macbeth: Gender And Identity In Bollywood Adaptations, Rashmila Maiti

Graduate Theses and Dissertations

This project analyzes adaptation in the Hindi film industry and how the concepts of gender and identity have changed from the original text to the contemporary adaptation. The original texts include religious epics, Shakespeare’s plays, Bengali novels which were written pre-independence, and Hollywood films. This venture uses adaptation theory as well as postmodernist and postcolonial theories to examine how women and men are represented in the adaptations as well as how contemporary audience expectations help to create the identity of the characters in the films. Ultimately, this project hopes to fulfil the gap in scholarship on adaptations in Bollywood.

Localized Teacher Supply And Demand In Arkansas: An Exploration Of The Supply And Demand Of Teachers In Arkansas School Districts, Leesa M. Foreman

Graduate Theses and Dissertations

There have been widespread reports of an impending teacher shortage crisis in the U.S. for more than 30 years. In the U.S., there are claims of a widespread national shortage while research indicates teacher shortages are specific to certain subjects and schools. Part of the reason for the conflicting accounts is how shortage is identified and what information is used to assess it. In this study, I test whether a uniform teacher shortage exists across the state of Arkansas. I hypothesize that, rather than a universal shortage, teacher shortages are more likely to occur in certain regions and subjects. I …