Digital Commons Network^™

A Behavioral Test Of Contamination Fear In Excessive Health Anxiety, Robert Edwin Brady

Graduate Theses and Dissertations

Hypochondriasis and health anxiety are characterized by preoccupation with the fear of currently having a serious physical illness. The Diagnostic and Statistical Manual of Mental Disorders conceptualization of hypochondriasis does not include consideration of the fear of acquiring an illness; however, many individuals with severe health anxiety report concern about contamination, suggesting that the current conceptualization of hypochondriasis may be incomplete. The present study utilized behavior approach tasks (BATs) to examine the degree to which contamination fear is present in severe health anxiety. Additionally, perceived vulnerability to disease (PVD) and disgust were tested as potential mechanisms in health anxiety and …

Systematic Observation Of Coach Feedback In Elite Youth Volleyball, Mark David Mann

Graduate Theses and Dissertations

The purpose of the study was to understand the relationship of coach feedback during time-outs to the performance of 16-18 year old volleyball players in competitive match play situations. The systematic observation of coach feedback during 89 time-outs was recorded using the Coach Time-Out Observation Instrument (CTOOI). Out of the 879 feedback statements that were made during the 89 time-outs, the CTOOI categorized coach feedback for technical feedback (with an internal or an external focus), tactical feedback (referring to our team or the opponent), and psychological feedback (as either encouraging or discouraging remarks). Data from the Game Performance Assessment Instrument …

Understanding How Adult Educators Apply Andragogy In A Correctional Educational Setting: A Case Study, Carl Jenkins Stephen

Graduate Theses and Dissertations

Yes as your words

The purpose of this case study was to examine how adult educators apply the six principles of andragogy, by Malcolm Knowles with adult learners in a correctional educational GED program. The following six principles label adult learners as people who: (1) Are self-directed and intrinsically motivated learners; (2) Bridge life experiences with old knowledge with new learning; (3) Are goals-driven learners; (4) Expect experiences to be relevant to them; (5) Are practical learners; and (6) Want respect (Knowles, 1984). The study included qualitative research. There were nine participants involved in this study. Conversational interviews were conducted …

Divine Hiddenness And The Challenge Of Inculpable Nonbelief, Matthew R. Sokoloski

Graduate Theses and Dissertations

Divine hiddenness is the idea that God is in some sense hidden or obscure. This dissertation responds to J.L. Schellenberg's argument, based on divine hiddenness and human reason, against the existence of God. Schellenberg argues that if a perfectly loving God exists, we would not expect to find such widespread nonbelief in God's existence. Given the amount of reasonable nonbelief in the world, Schellenberg argues that an agnostic ought to conclude that God does not exist rather than conclude that God is hidden. Schellenberg's argument has three major premises: (1) If there is a God, he is perfectly loving; (2) …

Worry Induction Among Adolescents: A Laboratory Evaluation, Jamie Leigh Frala

Graduate Theses and Dissertations

Available research indicates that worry is an important process involved in the development and maintenance of both psychological (e.g., Generalized Anxiety Disorder) and physical (e.g., coronary heart disease) problems. However, this process is still in need of further investigation, particularly among adolescents. While a sizable body of literature has examined the nature, prevalence, and correlates of worry in both adults and youth, laboratory investigations of this variable using a real-time worry induction paradigm have previously only been done with adults. The current study aimed to extend the literature by using the controlled laboratory methods well established in the adult literature …

Narrative Identity Within A Workers' Rights Organization, Emily Ann Hallgren

Graduate Theses and Dissertations

This research includes in-depth interviews and participant observation to examine the construction of narrative identity by the staff members and worker-members of a workers' rights organization in Northwest Arkansas. I seek to understand how the organization negotiates the broader cultural and institutional narrative identities with the personal narrative identities of the worker-members in a cultural context hostile toward undocumented immigrants. Further, I examine how the worker-members themselves both internalize and challenge the organizational, institutional, and cultural narratives about undocumented immigrant workers. Findings reveal that the staff members and the worker-members create different narratives for different purposes, though both are concerned …

Sanitation Assessment Of Food Contact Surfaces And Lethality Of Moist Heat And A Disinfectant Against Listeria Strains Inoculated On Deli Slicer Components, Sabelo Muzikayise Masuku

Graduate Theses and Dissertations

The overall objectives of this study were to: evaluate the efficacy of different cleaning cloth types and cloth-disinfectant combinations in reducing food contact surface contamination to acceptable levels; determine the optimum moist heat and moist heat + sanitizer treatments that can significantly reduce the number of Listeria strains on deli slicer components; and investigate if the moist heat treatment used in this study induced the viable-but-non-culturable (VBNC) state in Listeria cells. The efficacy of wiping cloths was measured using ATP-bioluminescence and total plate count methods using four different wiping cloths and silver dihydrogen citrate sanitizer on food contact surfaces. The …

Whores & More: Selected Stories By Hernán Migoya, Nikki Noreen Settelmeyer

Graduate Theses and Dissertations

This is a collection of short stories written by Hernán Migoya from the books, Todas putas and Putas es poco. The stories have been translated from the original Spanish to English. The selected stories demonstrate the humor, style, and neurosis typical of Migoya's writing.

Use Of Ultra High Vacuum Plasma Enhanced Chemical Vapor Deposition For Graphene Fabrication, Shannen Adcock

Graduate Theses and Dissertations

Graphene, what some are terming the "new silicon", has the possibility of revolutionizing technology through nanoscale design processes. Fabrication of graphene for device processing is limited largely by the temperatures used in conventional deposition. High temperatures are detrimental to device design where many different materials may be present. For this reason, graphene synthesis at low temperatures using plasma-enhanced chemical vapor deposition is the subject of much research. In this thesis, a tool for ultra-high vacuum plasma-enhanced chemical vapor deposition (UHV-PECVD) and accompanying subsystems, such as control systems and alarms, are designed and implemented to be used in future graphene growths. …

Silicon Germanium Sram And Rom Designs For Wide Temperature Range Space Applications, Matthew Barlow

Graduate Theses and Dissertations

This thesis presents a design flow from specifications and feature requirements to embeddable blocks of SRAM and ROM designs from 64 bytes to 1 kilobyte that are suitable for lunar environments. The design uses the IBM SiGe 5AM BiCMOS 0.5 micron process for a synchronous memory system capable of operating at a clock frequency of 25 MHz. Radiation mitigation techniques are discussed and implemented to harden the design against total ionizing dose (TID), single-event upset (SEU), and single-event latch-up (SEL). The memory arrays are also designed to operate over the wide temperature range of -180 °C to 125 °C. Design, …

Recognizing Patterns In Transmitted Signals For Identification Purposes, Baha' A. Alsaify

Graduate Theses and Dissertations

The ability to identify and authenticate entities in cyberspace such as users, computers, cell phones, smart cards, and radio frequency identification (RFID) tags is usually accomplished by having the entity demonstrate knowledge of a secret key. When the entity is portable and physically accessible, like an RFID tag, it can be difficult to secure given the memory, processing, and economic constraints. This work proposes to use unique patterns in the transmitted signals caused by manufacturing differences to identify and authenticate a wireless device such as an RFID tag. Both manufacturer identification and tag identification are performed on a population of …

Role Of Vegetation And Environmental Characteristics On Slope Stability In Northwest Arkansas, Michael Maguigan

Graduate Theses and Dissertations

Slope failure continues to pose risks to society because knowledge of environmental factors and their interactions are unclear and possibly misunderstood. This misunderstanding leads to generalizations about slope failure susceptibility mapping, despite knowing that slope failures are likely the result of an extensively complex set of interactions among a number of environmental, edaphic, and geomorphic characteristics. Therefore a series of experiments were conducted to investigate the effects of slope, soil texture, vegetation cover, bedrock permeability, and compaction,. A wooden flume with a slope face 1 m wide by 1.5 m long with a 10 cm toe was constructed to contain …

Fluorescence Enhancement Using One-Dimensional Photonic Band Gap Multilayer Structure, Jian Gao

Graduate Theses and Dissertations

Fluorescence enhancement using one-dimensional photonic band gap (1DPBG) multilayer structures is demonstrated in this dissertation. Designed with proper refractive indices and thicknesses, the alternating high and low index multilayer thin film structures combine photonic crystal resonance and omni-directional reflection together to enhance the excitation light irradiance and improve the collection efficiency of the fluorescent emission light with different polarizations. Gallium phosphide was chosen as the high index material and its fabrication process was optimized. The field enhancement effect was experimentally confirmed for two designs with achieved enhancement factors of 50̃69 folds corresponding to TE and TM waves. The omni-directional reflection …

The Marked Tree Site: Evaluation Of Geosynthetic Reinforcements In Flexible Pavements, Taylor Mitchell Goldman

Graduate Theses and Dissertations

This document presents findings from a three-year, full-scale, field research project aimed at determining the benefits of using geosynthetic reinforcements to improve the performance of flexible pavements constructed over poor subgrade soils. The test site, known as the Marked Tree site, is an 850-ft (258-m) long segment of low-volume frontage road along Highway 63 in the town of Marked Tree, Arkansas. The site, constructed in 2005, consists of seventeen 50-ft (15.2-m) long flexible pavement test sections with various types of geosynthetic reinforcements (woven and nonwoven geotextiles, and geogrids), which were all positioned at the base-subgrade interface, and two different nominal …

Influence Of Recycled Asphalt Shingles On Asphalt Binder Content, Mixture Stiffness, And Laboratory Rutting Performance, Joshua David King

Graduate Theses and Dissertations

Recycled asphalt shingles (RAS) is a technology in which pavement costs can be reduced significantly and pavement properties may be enhanced. Also, incorporating shingles into pavements reduces the impacts of waste shingles in landfills, preserving our environment. However, for this new technology to be practical for implementation, a better understanding of how the ground shingles affect the properties of the asphalt is necessary. The purpose of this research was to examine the effects of recycled asphalt shingles on asphalt binder content, mixture stiffness, and laboratory rutting performance. For this project, shingles were added to hot mix asphalt mixtures at 2.5, …

Crisis Communication Needs Assessment: A Delphi Study To Enhance Instruction For Agricultural Communicators And Other Stakeholders, Allyson Ceary Mcguire

Graduate Theses and Dissertations

Agricultural communicators and industry stakeholders need to be able to develop, prepare and implement crisis communication plans to help assure the sustainability of the agriculture industry should a crisis event occur. A thorough exploration of possible options and needs for training crisis communicators is a needed study in the agriculture industry. Students learning to prepare for managing crises in real life situations are rarely taught in a hands-on, experiential manner. Students can read and analyze case studies pertaining to crises, but without having an actual crisis; little means exist for preparing students for real world situations. There is a need …

Portraying The Role Of Ezra Chater In Tom Stoppard's Arcadia, Joshua David Kellman

Graduate Theses and Dissertations

In January of 2011 I began working on the role of Ezra Chater

in Tom Stoppard's 1993 masterpiece

Arcadia . The production was under the

direction of Mavourneen Dwyer. After a month and a half of

rehearsal we opened on February 25th, 2011, and began a run of

performances that lasted until March 6th. Ezra Chater appears twice

over the course of the play, first in Act 1 scene 1, then in Act 1 Scene

III, and his character is integral to the mystery that connects the past

and present scenes together. In this paper I will be detailing the …

Design Of An 866 Mhz On-Chip Frequency Synthesizer, Phaniraj Joshi

Graduate Theses and Dissertations

There is a strong need for stable frequency references with large tuning ranges in today's communication systems. While the crystal oscillators assure good frequency stability, it is not possible to achieve a large frequency range by tuning the passive components attached to them. Frequency synthesizers are usually used for this purpose because of their ability to produce a variety of output frequencies. The Phase Locked Loop (PLL) based frequency synthesizer is the most preferred of all types of synthesizers available because of its additional features like programmability, low noise and low cost as well as high accuracy and stability. The …

Creativity In Triadic Supervision: Using Mandalas To Impact The Working Alliance, Kelly Agnes Dunbar

Graduate Theses and Dissertations

This qualitative study investigated the use of mandalas as a creative approach with the potential to impact the supervisory working alliance within the context of triadic supervision. Participants (n=7) included master's level counselors-in-Training (CITs), all female, and ranging in age from 23 to 44. Data generated by the formal interviews gained support for using mandalas as a creative approach in triadic supervision as they revealed the potential to impact the working alliance and the goals, task, and bond therein. Of further importance was the finding that the bond between paired CITs in triadic supervision sessions was also impacted by the …

Disclosing An Invisible Disability During The Interview Process: A Qualitative Study, John Elias Sassin

Graduate Theses and Dissertations

Rehabilitation professionals, persons with disabilities and employers were asked to participate in a focus group interview exploring the phenomena of disclosing invisible disabilities during the interview process. This Qualitative study examined disclosure of disability from each stakeholder's perspective in an effort to understand its impact on the interview. After transcribing the focus group interview and analyzing the data; five themes emerged reflecting each stakeholder's views on disclosure. The themes revealed the persistence of attitudinal barriers that people with disabilities face in seeking employment; if and when a person should disclose; what are the positive and negative aspects of disclosure and …

A Nietzschean Account Of Human Flourishing: Affirming The Will To Power Inside The Contours Of Friendship, Christian Joshua Roos

Graduate Theses and Dissertations

In this dissertation, I examine Friedrich Nietzsche's notion of the will to power, his account of friendship and his understanding of human flourishing. Through textual analysis, I offer a new way of interpreting the will to power, as the achieving of self-realization. The process of achieving self-realization is undergirded by the satisfaction of seven existential needs that are rooted in the paradoxical human conflict between instincts and consciousness. The existential needs are the need for a frame of orientation, the need for devotion, the need for unity, the need for rootedness, the need for stimulation, the need for effectiveness and …

Analyzing Spring Freeze Impacts On Deciduous Forest Productivity Using Modis Satellite Imagery, Karl Lintvedt

Graduate Theses and Dissertations

The impacts of an April 2007 spring freeze event on the productivity of deciduous broadleaf forest were analyzed using geographic information system (GIS) tools. Forest productivity was modeled using the Enhanced Vegetation Index (EVI), as recorded by the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite sensor. Measures of spatial autocorrelation were used to quantify the degree of spatial congruence between a map depicting the severity of the freeze event, and maps modeling forest productivity throughout the year. The results show a geographic correlation between the unseasonably low minimum temperatures sustained during the freeze and the unusually low forest productivity that followed. …

Detection Of Two Pathogens Of High Importance To The National Poultry Improvement Plan: Salmonella Spp. And Mycoplasma Spp., Robin Levi Jarquin

Graduate Theses and Dissertations

In 1935, the National Poultry Improvement Plan (NPIP) was created to control Salmonella gallinarum and Salmonella pullorum . These two pathogens were devastating economically for poultry producers. Through cooperative efforts using vaccination and strict biosecurity, these two pathogens were eradicated from the United States. Currently, the NPIP program is targeting two other poultry pathogens, Salmonella enterica serovar Enteritidis and Mycoplasma . In the broiler industry it targets 2 specific Mycoplasma species (synoviae, gallisepticum). Vaccinations for these bacteria are available, but are not fully effective at controlling all strains and serovars. Thus, constant monitoring systems and strict biosecurity measures are necessary …

Proteome Based Development Of Novel Affinity Tail For Immobilized Metal Affinity Chromatography And Hydrophobic Interaction Chromatography, Neha Tiwari

Graduate Theses and Dissertations

At industrial scale, reducing the step in purification and recovery is desired; this not only decreases the cost but also increases the yield. Hydrophobic Interaction Chromatography (HIC) and Immobilized Metal Affinity Chromatography (IMAC) both are not harsh on biological structure or activity of proteins; also both the techniques are economical and therefore a suitable choice at industrial level. This dissertation comprises of three parts. Purpose for the Part I was to identify and characterize Escherichia coli proteins which display affinity towards both IMAC and Hydrophobic Interaction Chromatography (HIC). Co (II) IMAC was chosen as the primary capture step, followed by …

Design And Implementation Of Metamaterial Based Strain Sensor Using Aperture Coupled Antenna, Michael Brandon Buscher

Graduate Theses and Dissertations

Strain sensors are used to convert the physical measured quantity of strain into an electrical signal suitable for processing by electronic equipment. Traditional strain sensors are comprised of a thin flexible film with a resistive pattern traced on the surface. As the sensor is deformed, the electrical resistance changes proportionally, giving a direct measure of the strain incurred. Metamaterials, particularly split ring resonators (SRR), lend themselves as a valuable tool for sensing applications due to their highly resonant nature and their very narrow bandwidth (high Q-factor). Due to very high field localization effects, they are extremely sensitive to both the …

Characterization And Molecular Analysis Of University Of Arkansas Peach, Prunus Persica (L.) Batsch, Flesh Types And Development Of A Post-Harvest Evaluation Protocol For Arkansas Peach And Nectarine Genotypes, Paul James Sandefur

Graduate Theses and Dissertations

This study determined the effect of pre-cold storage treatment on P. persica genotypes, developed a protocol for the evaluation of breeding selection and cultivar storage performance, and provided information on post-harvest performance of these individuals. Additionally, characterization of the peach and nectarine flesh types, validation of endopolygalacturonase (endoPG) DNA markers, and investigation of endoPG marker allele combinations associated with the slow-melting-flesh (SMF) trait were done.

Fruit from 30 individuals were harvested at minimum- and well-mature states. After conditioning for 24 h at 20 ◦C, all 2010 fruit were exposed to 2 min of 1 ◦C 100 ppm chlorinated hydro-cooling, a …

More Than Memories? Schema Transference From Media Characters To Real People, Hilary Ray

Graduate Theses and Dissertations

This study focused on whether personality traits and evaluations of television personalities are used to make inferences about new Social interaction partners. It tested the hypothesis that priming schemas of television personalities will bias inferences made about a stranger. The results were mixed. Participants in the experimental condition made more biased inferences about a stranger than did participants in the control condition. This transference was not influenced by participants' parasociability, and methodological limitations prevented conclusive study of the influence of affective evaluations in this effect. Future studies should attempt to increase methodological control and introduce a diverse set of measures …

Enhancing Soybean Profitability Using Portfolio Theory, Osemenkhian Cynthia Onyechere

Graduate Theses and Dissertations

The purpose of this study was to estimate the effect of utilizing portfolio theory on producers' profitability in the production of soybeans in three test locations - Keiser, Marianna and Rohwer - in Arkansas. The study used empirical yield data, their variances and covariances over a nine year period (2002-2010) in selecting a portfolio of soybean varieties that maintains or increases yield while minimizing the yield risk. Furthermore, carbon emissions associated with soybean production was estimated by modeling the effect of a potential carbon tax as well as the potential benefit of carbon offset payments resulting from carbon sequestration. The …

Nitrogen Retention And Denitrification In Reservoirs, Erin Grantz

Graduate Theses and Dissertations

Studies coupling direct measurements of micro-scale nitrogen (N) cycle processes with ecosystem-scale flux estimates are needed to determine N retention hotspots within river networks, where up to 50% of terrestrial loading to aquatic systems is retained. This study examined the role of denitrification, a microbially-mediated reactive N removal pathway, in ecosystem-scale N retention in 3 small (< 1 km2), shallow flood-control reservoirs. Annual reservoir N retention was estimated through mass balance modeling of system inputs and outputs. Annual denitrification rates were estimated by combining multiple measurements of seasonal, habitat-specific dinitrogen gas (N2) fluxes. Annual reservoir N retention ranged from 14 - 19 g m-2 in the reservoirs, while reactive N removal through denitrification was 13 - 25 g m-2. Denitrification efficiency, or the portion of the retained N load that was denitrified, was high relative to other lentic systems and was > 100% at 2 sites. Previous lentic denitrification studies may have underestimated denitrification efficiency by not considering water column denitrification, which was 50% of total denitrification at one study reservoir. However, not all potential inputs, most importantly biological N2 fixation, were included in this …

Design And Fabrication Of Nanofluidic Systems For Biomolecule Characterizations, Orain Ansel Hibbert

Graduate Theses and Dissertations

Nanofluidic channel systems were designed and fabricated by combining MEMS microfabrication with AFM nanolithography. In the fabrication process flow, photolithography was first utilized to pattern microfluidic channels and reservoirs on a 4" Pyrex substrate. Subsequently, atomic force microscopy (AFM) based nanolithography was used to mechanically fabricate nanochannels to connect the microreservoirs which formed the inlet and outlet of the nanofluidic system. A Tap190 Diamond-Like Carbon (DLC) AFM tip with a force constant of 48 N/m and a radius of less than 15 nm was used as the nanolithography tool. The resultant nanochannel ranges from 20 to 80 µm in length …