Digital Commons Network^™

Towards Systematic Selection Of Terrain- And Ground Cover-Specific Lidar Filtering Parameters, Vance Green

Graduate Theses and Dissertations

Accurate automated classification of LiDAR point clouds is a well-known problem and proper parameterization of the classification algorithm is essential to creating useful bare-earth terrain models. Parameterization is particularly important in areas characterized by extremely low relief, such as the Little Red River Irrigation Project Area in central Arkansas. In this kind of landscape, analyses such as hydrological flow models are sensitive to small changes in the topography, and therefore prone to errors in the classification of the LiDAR point cloud and the digital elevation models (DEMs) derived from it. Developing effective project-specific parameters requires a high degree of knowledge …

Field Screening Of Diverse Soybean Cultivars For Flood Tolerance, Jane Achando Khatenje Mokua

Graduate Theses and Dissertations

Flooding can significantly reduce soybean growth, development, and yield. Therefore, screening and identification of flood-tolerant soybeans will enhance development of cultivars that are well suited for flood-prone areas. Sets of screening tests were conducted in Stuttgart, Arkansas using three separate but related experiments, with the purpose of establishing effective flood tolerance screening protocol that can identify tolerant and sensitive cultivars. Each experiment was completely randomized with three replications. The first experiment involved screening of 256 maturity group (IV and V) cultivars. Flooding was imposed at the fifth-node (V5) or first-bloom (R1) stage for ten days. Post-flood visual ratings and stand …

Design And Development Of A Wearable Wireless Health Monitoring System: A Smart Watch Approach, Keerthi Paranikumar

Graduate Theses and Dissertations

According to Statistics, every year, about 610,000 people die because of heart disease in United States of America. (i.e. 1 in every 4 deaths.*) Heart disease is common for both men and women. Annually, about 370,000 people die because of coronary heart disease, which is the most common type of heart disease [1]. About 735,000 Americans have heart attack every year. In this, 210,000 people gets heart attack who already has heart problems and 525,000 people get heart attack for the first time [2]. Not many people know that they have heart problems. Around 47% of the people in United …

"Socratic Circles Are A Luxury": Exploring The Conceptualization Of A Dialogic Tool In Three Science Classrooms, Michelle Renee Copelin

Graduate Theses and Dissertations

Research has shown that dialogic instruction promotes learning in students. Secondary science has traditionally been taught from an authoritative stance, reinforced in recent years by testing policies requiring coverage. Socratic Circles are a framework for student-led dialogic discourse, which have been successfully used in English language arts and Social studies classrooms. The purpose of this research was to explore the implementation process of Socratic Circles in secondary science classes where they have been perceived to be more difficult. Focusing on two physical science classes and one chemistry class, this study described the nature and characteristics of Socratic Circles, teachers’ dispositions …

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 …

Spring Migration Ecology Of American Woodcock (Scolopax Minor) In The Central Management Region Of The United States, Cari Elizabeth Sebright

Graduate Theses and Dissertations

American woodcock (Scolopax minor) is a migratory game bird in population decline since the start of monitoring in 1968. Researchers are interested in gaining knowledge of spring migration ecology to improve migration habitat and mitigate population decline. I captured six woodcock with mist and hand nets on nocturnal habitat and marked them with VHF (very high frequency) transmitters in northern Arkansas. I documented the distance they traveled between nocturnal and diurnal habitats (n=27), and documented diurnal vegetation characteristics at sites used (n=25). I found that woodcock moved an average of 370 m (SE 25.31 m) with the longest movement being …

Southeastern Monochamus And Their Interactions With Healthy Shortleaf Pine Trees And Associated Ips Grandicollis Bark Beetles, Matthew Walker Ethington

Graduate Theses and Dissertations

Insects in the genus Monochamus are medium to large-sized, wood-boring beetles whose primary hosts in the Northern Hemisphere are pine trees. These beetles interact with both conifer hosts and associated insects throughout their life history. Past research has demonstrated that Monochamus are saprophagic, but recent findings show that they may colonize healthy pine trees. To determine if southeastern Monochamus could colonize healthy pines, adult Monochamus were attracted to healthy shortleaf pine trees from May to September, 2014, using host volatiles, Ips bark beetle kairomones, and congeneric pheromones. Subsequent development of oviposited eggs from 18 host trees was monitored. The results …

Individual Differences In Anxiety Sensitivity And Emotional Avoidance: Potential Links In The Association Between Internalizing Problems And Peer Victimization, Juventino Hernandez Rodriguez

Graduate Theses and Dissertations

Chronic peer victimization has been linked to short- and long-term problems such as anxiety, depression, and aggression (Hawker & Bouton, 2000; Reijntjes, Kamphuis, Prinzie, & Telch, 2010; Reijntjes, Kamphuis, Prinzie, Boelen, van der Schoot, & Telch, 2011). Most children are able to escape the role of stable victim, but some struggle to end victimization and the negative trajectory associated with it. The present study explored individual differences in anxiety sensitivity and emotional avoidance, developmental vulnerabilities that heighten children’s risk for internalizing problems, as possible predictors of children’s level of peer victimization. Participants were 677 fourth-grade students and their teachers. Multi-informant …

A Descriptive Case Study Of Individuals With Presumed Ocular Histoplasmosis Syndrome Utilizing A Facebook Support Group, Lisa Aimee Thompson

Graduate Theses and Dissertations

This dissertation describes the experiences of people diagnosed with presumed ocular histoplasmosis syndrome as they participate in an online peer-support group on Facebook. This is a descriptive case study of factors related to adjustment, treatment, emotional distress, access to services, and online peer support. Participants were interviewed and observed, and documents were collected to describe this phenomenon.

Evaluating The Intrinsic Similarity Between Neural Networks, Stephen Charles Ashmore

Graduate Theses and Dissertations

We present Forward Bipartite Alignment (FBA), a method that aligns the topological structures of two neural networks. Neural networks are considered to be a black box, because neural networks contain complex model surface determined by their weights that combine attributes non-linearly. Two networks that make similar predictions on training data may still generalize differently. FBA enables a diversity of applications, including visualization and canonicalization of neural networks, ensembles, and cross-over between unrelated neural networks in evolutionary optimization. We describe the FBA algorithm, and describe implementations for three applications: genetic algorithms, visualization, and ensembles. We demonstrate FBA's usefulness by comparing a …

8 Bit Split Array Based Charge Scaling Digital To Analog Converter With Rail To Rail Buffered Output, Sai Kiran Akula

Graduate Theses and Dissertations

This thesis presents the design, simulation and layout of a silicon carbide (SiC) 8 bit split array charge scaling digital to analog convertor (DAC). The converter consists of the charge scaling capacitor chain with two operational trans-conductance amplifiers (op amp) in voltage follower configuration. The op amps used in the design have the input common mode ranges of 0 to 11.2 V and 4.7V to 14.5V respectively. Additional logic circuit topologies are designed, which help to switch the op amps when needed to provide a rail to rail unity gain at the output. As the design is based on the …

Factors Affecting The Sustainability Of Public-Private Collaborations At The Municipal Level: The Case Of Motorcycle Rallies, Anne Burgin Diallo

Graduate Theses and Dissertations

Urban public-private collaborations promoting large-scale tourist events are increasingly common. The incentive to collaborate, for urban policy-makers, is the perception of the opportunity for economic development, and yet little is known about factors contributing to the sustainability of such urban cross-sector collaborations. The dissertation accomplishes three objectives. First, it combines resource dependence theory (RDT) and goal congruence theory (GCT) to extend our understanding of how collaborating organizations align their respective organizational goals and manage their interdependencies in complex, urban, inter-sectoral, environments. This is accomplished through use of complementary factors from each theory. Second, using qualitative methods, the research applies RDT …

Microbial Safety, Shelf Life Stability, Quality Preservation, And Consumer Acceptance Of Vacuum-Infused, Irradiated Chicken Breast Meat Treated With Natural Plant Extracts And Organic Acids, Kenneth Franklin Over

Graduate Theses and Dissertations

Contamination of poultry products with food borne pathogens is a consistently recurring problem in the United States and the world. Recalls associated with chicken contamination are responsible for considerable economic losses to the poultry industry. Many decontamination steps are currently in place to reduce the likelihood of contaminated products reaching the consumer, but despite these safeguards, contamination events are still uncomfortably frequent. Irradiation is a safe and effective means of ensuring the safety of both ready-to-cook and ready-to-eat poultry but is not utilized in the United States. This is due, in part, to certain irradiation dose-dependent quality characteristic defects associated …

Effects Of Magnetically Induced Micro-Mixing On Nanofiltration Performance, Guanghui Song

Graduate Theses and Dissertations

Nanofiltration (NF) is a relatively new membrane separation process mainly used for removing low molecular weight species from aqueous and non-aqueous solutions. NF membranes suffer from concentration polarization leading to membrane fouling thus compromised membrane performance. Magnetically responsive nanofiltration (NF) membranes functionalized with superparamagnetic nanoparticles (SPNs) attached to the chain ends of grafted polymer nanolayers have been shown to be effective in breaking concentration polarization at the membrane-liquid interface under an appropriate external oscillating magnetic field. Under an oscillating magnetic field, the movement of the polymer chains acts as micro-mixer leading to the suppression of concentration polarization and improved filtration …

A Simulation Platform For Accurate Prediction Of In-Bin Drying And Storage Of Rough Rice, Houmin Zhong

Graduate Theses and Dissertations

Natural air (NA), in-bin drying and storage of rough rice generally maintains high grain quality, but the associated slow movement and occasional stagnation of the drying front during the process may result in problems of rice quality reduction, mold growth, and mycotoxin development, especially for rough rice in the top layers of the bin. Using modeling techniques to simulate in-bin rough rice drying in typically-encountered field scenarios may provide a tool for rapidly predicting the grain condition as drying progresses. The objectives for this study were to (1) investigate accurate models for predicting equilibrium moisture content (EMC) of rough rice …

Probabilistic Graphical Modeling On Big Data, Ming-Hua Chung

Graduate Theses and Dissertations

The rise of Big Data in recent years brings many challenges to modern statistical analysis and modeling. In toxicogenomics, the advancement of high-throughput screening technologies facilitates the generation of massive amount of biological data, a big data phenomena in biomedical science. Yet, researchers still heavily rely on key word search and/or literature review to navigate the databases and analyses are often done in rather small-scale. As a result, the rich information of a database has not been fully utilized, particularly for the information embedded in the interactive nature between data points that are largely ignored and buried. For the past …

Evaluation Of The Impact Of Meat And Bone Meal Nutritional Variability On Broiler Performance, Christopher Caleb Eagleson

Graduate Theses and Dissertations

The objective of this trial was to determine if varying the nutritional composition of meat and bone meal (MBM) would impact broiler performance and yield compared to diets which provide a consistent quality of MBM. Twelve hundred day-old male broilers from the Cobb 500 female line were randomly allocated to 48 pens (25 chicks/pen; 22 square feet) and grown to 49 days of age. Starter, grower, and withdrawal diets were formulated to contain MBM at 10, 7.5 and 5% respectively using the Cobb nutritional standards. Four treatments provided were: 1) H.J. Baker proprietary blend, ProPlus 57 fed continuously; 2) MBM …

Intertribal Communication, Literacy, And The Spread Of The Ghost Dance, Justin Randolph Gage

Graduate Theses and Dissertations

During the 1880s, western Native Americans created networks of communication threaded together through postal correspondence and intertribal visitation among reservations. Through this network native groups cultivated intertribal relationships and exchanged ideas despite attempts by the United States government to separate, contain, and Americanize them. Frequent visits to other reservations, often over long distances, gave men and women a chance to share news and information, exchange religious and cultural traditions, and forge new intertribal bonds. Many Indians also used letter-writing to communicate with the world outside of their reserves in ways unanticipated by government policy makers. Thousands of Native Americans learned …

Paddling A Trail, Erin Jennings Gilleece

Graduate Theses and Dissertations

Paddling A Trail documents construction of the first water trail in Arkansas. The 15 minute film is narrated by Arkansas Canoe Club Conservation Chair Debbie Doss. It follows Doss, and other volunteers as they mark the Wattensaw Bayou Trail in Hazen, Arkansas. The film is co-narrated by Kristen Bartlow of the Arkansas Game and Fish Commission. The footage was shot over three days, in two different locations. These were the White River in Northwest Arkansas and Wattensaw Bayou in Hazen, AR. The film illustrates the positive role trails can have on the environment and local economies. More importantly, the film …

Evaluation Of Conservation Practices Through Simulation Modeling And Tool Development, Gurdeep Singh

Graduate Theses and Dissertations

For the first objective, predicted impacts of selected Mississippi River Basin Initiative (MRBI) conservation practices (CPs) on sediment and nutrient loss were assessed. The study area was L’Anguille River Watershed (LRW), a priority focus watershed of the MRBI program and the simulated CPs were filter strip, critical area planting, grade stabilization structure, irrigation land leveling, irrigation pipeline, irrigation water management, and nutrient management. The Soil and Water Assessment Tool (SWAT) model was calibrated (1998 – 2005) and validated (2006 – 2012) for flow, sediment, total phosphorus (TP), and nitrate-nitrogen (NO3-N) at the Colt site (503 sq. km. drainage area) and …

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 …

Examining Employability As Associated With Ic3, Mos, And Aca Certifications, Kelley Leigh Todd

Graduate Theses and Dissertations

Forrier and Sels (2003) define employability as “an individual’s chance of a job on the internal and/or external labor market” (p. 106) and is important (Wittekind, Raeder, & Grote, 2010). Possessing an industry certification may be considered an example of human capital skill. The human capital theory suggests qualifications, knowledge, skills, and experience of individuals may lead to increased earnings or productivity (Becker, 1993; Rosen, 1987; Schultz, 1971). As such, the human capital theory provides a framework for studying perceived employability (Wittekind, Raeder, & Grote, 2010; Verhaar & Smulders, 1999) as associated with IC3, MOS, and ACA industry certifications.

Randall …

Dark Matter Halo Concentration And The Evolution Of Spiral Structure In N-Body, Barred Spiral Galaxies, Jazmin Esmeralda Berlanga Medina

Graduate Theses and Dissertations

Motivated by the evidence of relationships between pitch angle (the tightness of spiral arm structure in the disk), P, and various indicators of central mass concentration, as well as the theoretical relationship between halo mass concentration and the density of visible matter in the central part of the galaxy, we look at a possible relationship between P and cvir (the virial concentration of the dark matter halo) in N-body simulations of barred, spiral galaxies. We also look at the evolution of pitch angle over time in higher temporal resolution than any data currently available in the literature. We find that …

Epitaxial Growth Of Si-Ge-Sn Alloys For Optoelectronic Device Application, Aboozar Mosleh

Graduate Theses and Dissertations

Microelectronics industry has experienced a tremendous change over the last few decades and has shown that Moore’s law has been followed by doubling the number of transistors on the chip every 18 months. However, continuous scaling down of the transistors size is reaching the physical limits and data transfer through metal interconnects will not be able to catch up with the increasing data processing speed in the future. Therefore, optical data transfer between chips and on-chip has been widely investigated. Silicon based optoelectronics has received phenomenal attention since Si has been the core material on which microelectronic industry has been …

The Role Of Sharing And Information Type In Children's Categorization Of Privileged And Conventional Information, Helana Girgis

Graduate Theses and Dissertations

Categorization is an essential part of our daily lives and an integral part of humans’ ability to function and interact within society. There are large bodies of research that document children’s categorization in domains such as natural kinds, artifacts and human kinds. One domain that has not been investigated is children’s ability to categorize different types of information; specifically conventional information, shareable to others with no restrictions, and privileged information, shareable to only a few. Study 1 investigated 4- and 5-year-olds and adults’ ability to categorize conventional and privileged information. All participants correctly categorized both types of information equally well …

An Assessment Of Primary Care Physician Opinions About Supporting The Independent Autonomous Practice By Advanced Practice Nurses, James Michael Flanigan

Graduate Theses and Dissertations

The Affordable Care Act (ACA) changed the national discussion about who is the decision-maker in healthcare delivery – physicians or others that pay the bill. The federal government is the largest payer of healthcare services while states are responsible for implementing the ACA’s features. Through the ACA, the federal government endorsed non-physician primary care by advanced practice registered nurses (APRN). The research question of this study is: Why do some primary care physicians support independent autonomous practice for advanced practice registered nurses while others do not? The research question should be important to policy-makers because physicians are the predominate purchasers …

The Efficacy Of An Eight-Week Undergraduate Course In Resilience, Asher J. Morgan

Graduate Theses and Dissertations

The purpose of this research was to measure the efficacy of an 8-week undergraduate

course in resilience. Finding useful strategies to understand how college students manage stress

and adversity is important to college administrators. The main topics that were assessed were

resilience, well-being, and assertiveness. Participants for this study included undergraduate

students enrolled either in a 8-week course on Resilience or a Public Health course. The

Connor-Davidson Resilience Scale, Questionnaire for Eudaimonic Well-Being, and the Simple

Rathus Assertiveness Scale were used to determine the efficacy of the 8-week course. Overall,

there was not a significant difference in resilience and well-being, …

Cotton Injury Due To Soil- Or Foliar-Applied Herbicides: An Assessment Based On The Influences Of Genetic, Agronomic, And Environmental Factors, Brandon William Schrage

Graduate Theses and Dissertations

Increasing populations of glyphosate-resistant weeds, such as Palmer amaranth, have prompted growers to pursue alternative means of weed control in cotton. In many cropping systems, this means the utilization of older chemistries and residual herbicides. The goal of this research was to evaluate and understand the agronomic and environmental factors that affect the inconsistent injury often associated with these herbicides as well as determine the impact of Palmer amaranth emergence date on seed production, biomass, and cotton yield. Experiments were conducted in three counties in Arkansas giving a distinct range of climate and soil texture. Injury, biomass, and number of …

Essays On Technology-Mediated Training: Implications For Design And Evaluation, Vishal Satyapal Shah

Graduate Theses and Dissertations

Information technology (IT) is increasingly used to impart a variety training skills, and these skills may range from specific software application operations and computer programming to learning about generic business processes. Using IT to assist training is broadly termed “Technology-Mediated Learning” (TML). Following the three essay model, this dissertation examines training interventions in the context of TML. In Essay 1, a thorough literature survey of technology training in Information Systems (IS) was conducted, resulting in clarification of the nomenclature used in TML. Essay 1 also identified of two leading theories used in TML research: (a) Social cognitive theory (SCT) (b) …

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, …