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Reconstructions At The Interface In Complex Oxide Heterostructures With Strongly Correlated Electrons, Benjamin Gray

Graduate Theses and Dissertations

Strongly correlated oxides exhibit a rich spectrum of closely competing orders near the localized-itinerant Mott insulator transition leaving their ground states ripe with instabilities susceptible to small perturbations such as lattice distortions, variation in stoichiometry, magnetic and electric fields, etc. As the field of interfacial engineering has matured, these underlying instabilities in the electronic structure of correlated oxides continue to be leveraged to manipulate existing phases or search for emergent ones. The central theme is matching materials across the interface with disparate physical, chemical, electronic, or magnetic structure to harness interfacial reconstructions in the strongly coupled charge, spin, orbital, and …

Education In Modern China A Case Study: Teachers' Attitudes Of In-Service / Professional Development In Guangzhou, China, Todd E. Neuhaus

Graduate Theses and Dissertations

China has a long history of education, which can be traced back to the Shang Dynasty (1523 B.C. to 1027 B.C.). During this long history changes occurred as the needs of society changed. During the Warring States Period (770 B.C. to 221 B.C.), the philosophies of Daoism and Confucianism were developed. These philosophies became the cornerstone of education theory and practice in China. At the end of the Qing Dynasty (1644 to 1911), steps were taken to train teachers with the goal of universal education for all of its citizens. Since 1977, the Chinese government has taken strides in universal …

Differential Extinction Of Disgust And Anxiety Among Victims Of Sexual Traumatization, Christal Badour

Graduate Theses and Dissertations

Emerging evidence suggests that in addition to fear, traumatic event-related disgust reactions may be integral to understanding the sequelae of sexual traumatization. Importantly, evidence broadly suggests compared to fear, disgust may be resistant to extinction. As such, conditioned disgust reactions may not evidence the same pattern of extinction observed with fear-based reactions. This may have important implications for the treatment of posttraumatic stress disorder (PTSD). As such, the current study sought to fill an important gap in the existing literature by examining specific processes and mechanisms that are likely to affect outcomes of exposure-based interventions following sexual traumatization. Specifically, 72 …

The Design And Implementation Of A Multi-Chip Power Module Layout Synthesis Tool, Brett W. Shook

Graduate Theses and Dissertations

This thesis presents the design and implementation of a software tool, referred to as PowerSynth, which is used to synthesize multi-chip power module (MCPM) layouts and also aids in the overall design process. MCPMs allow power electronics systems to achieve higher efficiencies and reduced size, weight, and cost through the compact integration of devices into a single package. MCPM design is highly multidisciplinary which involves electrical, thermal, and mechanical performance considerations. Conventionally, the design process may require several iterations and multiple software modeling tools to create high performance MCPMs. The layout of an MCPM consists of a pattern of metal …

The Use Of Recollection Rejection In The Misinformation Paradigm, Kara Moore

Graduate Theses and Dissertations

Across three experiments, I investigated the role of recollection rejection in rejecting false suggestions using the misinformation paradigm. The use of model-based measurement of recollection rejection was extended to the misinformation paradigm. I manipulated two factors, delay and feedback, that are known to influence the use of recollection rejection. Recollection rejection was used to reject false suggestions in the misinformation paradigm. Manipulating delay time did not affect the acceptance of misinformation or the use of recollection rejection. Warning participants about false information reduced misinformation acceptance but did not lead to increased rates of recollection rejection. Collectively, these findings suggest an …

Understanding The Influence Of Interfacial Chemistry In Core, Core/Shell And Core/Shell/Shell Quantum Dots On Their Fluorescence Properties, Omondi Bernard Omogo

Graduate Theses and Dissertations

Colloidal semiconductor nanocrystals (quantum dots) have received a great deal of attention due to their superior size tunable properties and promising applications in many areas. Some of the most practical areas of their applications include light emitting diodes (LED), photovoltaic and biological studies. Synthetic methods of these crystals is becoming more established with new strategies being reported every now and then. However, quantitative studies connecting the processes at the interface, namely core-ligand, core-shell and shell-shells, to the overall quantum dots fluorescence properties are not well understood. Specifically for cores, relating surface-atoms interactions, solvents, ligands nature, density and functional groups on …

Integrated Relationships: The Impact Of European Integration On The Special Relationship, 1969-1973, Benjamin Jared Pack

Graduate Theses and Dissertations

The special relationship has long been a topic of interest to historians of US foreign relations. The general consensus has been that the years 1969-1973 were a low point for Anglo-American relations, and have therefore been dismissed as largely insignificant. Rejecting this interpretation, this thesis contends that while certainly one of the lowest moments in the history of the special relationship, the Heath-Nixon relationship reveals much about the nature of the special relationship and America's relations with its allies more broadly. Focusing on the question of European integration (and the corresponding British entry into the European Community in 1973) and …

Fabrication Of Single Nanowire Device Using Electron Beam Lithography, Thach Pham

Graduate Theses and Dissertations

One dimensional nanostructure materials such as nanowires have drawn many interests among the scientific community for a wide range of applications such as field-effect transistors [1], [2], inverters[3], light-emitting diode [1], lasers [4], nanosensors [5], [6], and photodetectors [7]... Comparing with the characterization of nanowire arrays, characterizing a single nanowire will definitely provide a better understanding on new nanowire properties due to simplified behaviors of devices. Although promising theories could be drawn from those results, fabrication of test structure for single nanowire measurements cannot be easily processed using standard microfabrication techniques. Therefore, electron beam lithography integrated with photolithography technique has …

The Interethnic Communication Apprehension Of Students Of Color At The University Of Arkansas, Angela Courage-Mellott

Graduate Theses and Dissertations

Interethnic Communication Apprehension of students of color with white faculty members was studied at the University of Arkansas, a predominantly white university with predominantly white faculty. Interethnic Communication Apprehension is defined as a psychological response of fear or anxiety which causes avoidance of interaction with people from ethnic groups that are different from one's own (Neuliep & McCroskey, 1997). This study was conducted using the PRECA (Personal Report of Interethnic Communication Apprehension) measure created and validated by Neuliep and McCroskey (1997). Students of color who frequent the Center of Multicultural and Diversity Education were polled using the PRECA. Students of …

Efficacy Of Rice Insecticide Seed Treatments At Selected Nitrogen Rates For Control Of The Rice Water Weevil, Lissorhoptrus Oryzophilus Kuschel, Mallory Elise Everett

Graduate Theses and Dissertations

Seed-applied insecticides are the standard control method used to prevent rice water weevil (Lissorhoptrus oryzophilus Kuschel) injury to rice (Oryza sativa L.) roots, and often results in greater yields than rice that receives no seed-applied insecticide. Yield increases from seed-applied insecticides often occur even when insect pressure is low and should not cause yield loss. The research objective was to evaluate the effect of urea-nitrogen rate and seed-applied insecticide on number of rice water weevil larvae, nitrogen uptake and rice grain yield. Six trials were conducted at the Pine Tree Research Station (PTRS) and the Rice Research Extension Center (RREC) …

Against Self-Defense, Stephen Blake Hereth

Graduate Theses and Dissertations

Absolute Pacifism (or AP) is the thesis that no act of assault is morally permissible. This entails that all acts of self-defensive assault are impermissible. This essay defends AP against non-eliminativist theories of justified self-defensive assault - that is, theories of self-defensive assault which, contrary to AP, claim that at least some instances of self-defensive assault are morally permissible. Chapter 1 begins by defining assault and AP and subsequently exploring a species of AP wedded to the Doctrine of Double Effect (or DDE). Chapter 2 defends AP against the thesis that self-defensive assault is morally permissible but not morally obligatory. …

Power To The People? An Evaluation Of State-Level Environmental Justice Policies, Angela Michelle Hines

Graduate Theses and Dissertations

Communities of color in America lacking economical, educational, and political power have been largely invisible in the process of making major policy decisions. This is lack of access to decision-making venues has been viewed by many as the reason behind marginalized populations bearing the brunt of many societal burdens. The Environmental Justice Movement legitimized the claims of inadequate access to the decision-making process concerning environmental conditions in which African-Americans lived and worked. Through the use of disruptive actions reminiscent of those used throughout the Civil Rights Movement, the plight of communities plagued by the daily presence of hazardous waste gained …

Discrete Strain Engineering In Graphene, Cedric Marcus Horvath

Graduate Theses and Dissertations

Graphene has a number of fascinating mechanical and electrical properties. Strain engineering in graphene is the attempt to control its properties with mechanical strain. Previous research in this area has come up with an approach using a continuum theory to describe the strain induced gauge fields in graphene; however, this approach is only valid for small strains (5% at most). A discrete framework is being developed in Arkansas that can more accurately calculate the deformation (electrical) and (pseudo-)magnetic gauge fields created by large strains. Computational simulations were carried out and used to get discrete atomic positions for strained, suspended graphene …

Habitat Assessment Of Two Narrowly Endemic Plant Species, Ozark Spiderwort (Tradescantia Ozarkana) E. S. Anderson And Woods. And Newton's Larkspur (Delphinium Newtonianum) D. M. Moore, Autumn Lynn Coffey Olsen

Graduate Theses and Dissertations

The threat of biodiversity loss is upon us with the onset of climate change and our ever-demanding needs of the Earth's resources for a rapidly growing human population. Species highly vulnerable to loss are those limited in abundance and distribution, or those with reduced genetic diversity. Efforts to actively conserve a sensitive species require effectual data on the probable causes of their vulnerability. Two species of concern, Delphinium newtonianum and Tradescantia ozarkana, are globally rare endemic vascular plant species found only in the Interior Highlands of North America. In an attempt to understand the causes for their endemism, habitat …

Effect Of An After-School Garden Club Program On Elementary Students, Maggie Caroline Mcgriff

Graduate Theses and Dissertations

The purpose of this study was to determine if three elementary school garden club programs influenced students' attitudes and behaviors regarding fruit and vegetable consumption. Both quantitative and qualitative data collection and analysis took place, in the form of pretest and posttest questionnaires as well as participant interviews. Overall, non-significant results were found in the quantitative portion of the study, which led the researcher to determine that the garden club program had no significant effect on the participants regarding perceptions of fruit and vegetable consumption. The overall non-significant differences found before and after the garden club intervention programs could lead …

Mobile Banking Security Using Gps And Ldpc Codes, Matthew Francis Moccaro

Graduate Theses and Dissertations

Mobile Banking is becoming a major part of our world's financial system. Being able to manage one's finances on a mobile device can provide services that can make users more productive. It can also serve as a means of financial freedom to those who are unable to access physical banking facilities due to distance, or other problems. However, with such freedom also comes the need for security. A person's financial information is one of the most targeted groups of information by attackers. To secure these mobile freedoms, this paper presents a system to secure mobile banking procedures using global positioning …

Fertilizer Nitrogen Uptake Efficiency In Soft Red Winter Wheat And The Ability Of N-Star To Detect Alkaline Hydrolyzable Nitrogen In Crop Residues, Lana Aubrey Clark

Graduate Theses and Dissertations

Soil testing methods such as the Illinois Soil Nitrogen Test (ISNT) and Direct Steam Distillation (DSD) have been developed which measure alkaline hydrolyzable-N (AH-N) as a means of estimating potentially mineralizable-N. Crop residues play an important role in N cycling. However, the ability of the ISNT and DSD methods to determine AH-N within crop residues is unknown. Therefore, the first objective of this study was to determine the ability of the ISNT and DSD to quantify potentially mineralizable-N within five different crop residues common to Arkansas. Corn (Zea mays L.), soybean (Glycine max, L.), wheat, rice (Oryza sativa, L.), and …

Rape Myths And Consent In College-Aged Southern Students, Amy Leanne Cofer

Graduate Theses and Dissertations

Rape and sexual assault are problematic issues for women on college campuses. Internal and external consent play a role in understanding sexual assault because sexual assault is defined as "nonconsensual sexual activity obtained through force, threats, intoxication, or intimidation." Factors related to understanding consent may include attitudes regarding sexual assault and rape, known as rape myths, which are defined as attitudes and false statements concerning rape that are widely known and accepted, mainly served to justify male sexual aggression towards women. The southeastern United States is known for being religiously and politically conservative, where gender roles are intertwined with a …

You Can't Get There From Here: Movement Sf And The Picaresque, Robert Glen Wilson

Graduate Theses and Dissertations

This dissertation examines the crisis of authenticity in postmodern culture and argues that contemporary science fiction, specifically the subgenre of Movement SF, has evolved a unique answer to this crisis by adopting, perhaps spontaneously, the picaresque narrative structure. Postmodern fiction has a tenuous relationship with the issue of authenticity, such that the average postmodern subject is utterly without true authenticity at all, alternately victim to the socioeconomic conditions of his or her culture and to the elision of the self as a result of the homogenizing effects of advertising, television, etc. Postmodern SF also carries this bleak perception of the …

Cherokee Freedmen: The Struggle For Citizenship, Bethany Hope Henry

Graduate Theses and Dissertations

In 2011, the Cherokee Nation Supreme Court voted to exclude freedmen (descendants of former slaves) from voting, overturning a constitutional amendment that gave freedmen tribal rights. Cherokee freedmen argue that the Cherokee Nation is ignoring the Treaty of 1866 which granted all freedmen "rights as Cherokee citizens", and they call upon federal support to redeem their rights as equals. The Cherokee Nation, however, claims they are exercising tribal sovereignty and have a right to determine who is a member of their tribe. Using a comparative historical approach, the goal of this paper is to explore the institution of slavery among …

Psychometric Evaluation Of A Standardized Set Of Alcohol Cue Photographs To Assess Craving, David Edison Lovett

Graduate Theses and Dissertations

To date, research paradigms using alcohol-related stimuli have been limited in their reliability and generalizability due to a lack of published studies examining the psychometric properties of alcohol cues. The primary aim of the current study was to examine the factor structure of a set of alcohol cues and the associated validity and reliability of examining craving for alcohol in an alcohol cue-reactivity paradigm. Participants (N = 195, 74.4% male, 56.4% Asian, Asian American, or Pacific Islander) completed a web-based survey in which valence, arousal, and craving ratings were obtained following presentation of picture cues. Prior to picture cues, participants …

Coaching Style Preferences Of Division I College And Professional Softball Players, Megan Diane Langenfeld

Graduate Theses and Dissertations

The purpose of this study was to describe the coaching style and leader behavior preferences of softball players. The Leadership Scale for Sports (LSS; Chelladurai & Saleh, 1980) was administered to Division I college softball players and professional softball players from the National Professional Fastpitch league (NPF). Sixty-four softball players completed the Leadership Scale for Sport questionnaire (preference version), 52 Division I college softball players and 12 professional softball players from the NPF. Descriptive statistics revealed that softball players prefer Training and Instruction, Democratic Behavior, and Positive Feedback; players did not prefer Autocratic Behavior or Social Support. Follow-up univariate ANOVAs …

Small Mammal Community Associations And Habitat Use At Pea Ridge National Military Park, Benton County, Arkansas, Christopher Reddin

Graduate Theses and Dissertations

Juniperus virginiana L. (Eastern Red Cedar) is a fire-intolerant tree species that has been invading and altering grassland ecosystems throughout the American Great Plains and Midwest. To see how Eastern Red Cedar encroachment affects small mammal communities, we surveyed small mammals using mark-recapture methods in Eastern Red Cedar forest and 5 other habitats common to the Ozark region. Additionally, we compared the microhabitat use of presumed juniper obligate Peromyscus attwateri J.A. Allen (Texas Mouse) and its conspecific P. leucopus Rafinesque (White-Footed Mouse). We ran over 7000 trap-nights and found that the small mammal species composition in Eastern Red Cedar was …

Methane Emissions And Ammonia Volatilization From Drill-Seeded, Delayed-Flood Rice On A Silt-Loam Soil In Arkansas, Christopher Wade Rogers

Graduate Theses and Dissertations

The Environmental Protection Agency (EPA) currently uses a single methane (CH4) emissions factor of 160 kg CH4-C ha-1 for a primary rice (Oryza sativa L.) crop. The emissions factor is based on studies that do not adequately represent current management practices in Arkansas. Another concern is pre-flood fertilizer nitrogen (N) management, as the common N source, urea, is prone to loss via ammonia (NH3) volatilization. Thus, the objective of this research was to investigate trace gas emissions from rice on a silt-loam soil, including CH4 emissions as influenced by nitrogen (N) fertilization (i.e., optimal N and no N) in 2011, …

Atomic-Scale Characterization And Manipulation Of Freestanding Graphene Using Adapted Capabilities Of A Scanning Tunneling Microscope, Steven Barber

Graduate Theses and Dissertations

Graphene was the first two-dimensional material ever discovered, and it exhibits many unusual phenomena important to both pure and applied physics. To ensure the purest electronic structure, or to study graphene's elastic properties, it is often suspended over holes or trenches in a substrate. The aim of the research presented in this dissertation was to develop methods for characterizing and manipulating freestanding graphene on the atomic scale using a scanning tunneling microscope (STM). Conventional microscopy and spectroscopy techniques must be carefully reconsidered to account for movement of the extremely flexible sample.

First, the acquisition of atomic-scale images of freestanding graphene …

Survival, Abundance, And Geographic Distribution Of Temperate-Nesting Canada Geese (Branta Canadensis) In Arkansas, Margaret Eliese Ronke

Graduate Theses and Dissertations

Temperate-nesting Canada geese in Arkansas have grown in abundance and range since reintroduction in the 1980s. The Arkansas Game and Fish Commission uses harvest and other methods to maintain the population at desired levels. However, continued management of temperate-nesting geese requires knowledge of the population's demographics and current range to help establish quantifiable management goals.

To assess the need and effect of changing hunting regulations, survival and recovery rates and abundance were estimated for this population. Annual survival rates of temperate-nesting Canada geese banded and recovered in Arkansas from 2005 to 2011 were estimated using the Burnham joint live-dead recovery …

Knitting As A Therapeutic Group Technique With 4th Grade Elementary School Students, Cassandra Marie Dominick

Graduate Theses and Dissertations

The primary purpose of the current study was to explore the use of knitting as an expressive arts technique. Knitting groups were conducted with 4th grade elementary school students. Each group met for 8 sessions on a weekly basis. Participants were randomly assigned to either the experimental group or control group. The experimental group received knitting instructions in the group format first. Prior to beginning the group, all participants, their teachers, and their parents completed the Social Skills Improvement System assessment (Gresham & Elliot, 2008). This measure was repeated following the end of the experimental group and again approximately 8 …

Production Of A Soybean Meal With High-Protein And Low Anti-Nutritional Factors For Fish Feed, Maria De Las Mercedes Castro

Graduate Theses and Dissertations

Aquaculture is one of the fastest growing areas of the food production system. According to the FAO, its rise is expected to continue through the year 2030 in order to maintain per-capita consumption levels required for the increasing population. Fishmeal--obtained from wild-harvested fish--has been the source of protein for fish feed. However, data indicates that these fish harvests are in decline, which could restrain that growth. The possibility of a shortage of fishmeal prompted the industry to look into possible alternatives. Soybean meal appears as a promising substitute since it is an affordable high quality source of protein. However, the …

Crack Growth Behavior Under Creep-Fatigue Conditions Using Compact And Double Edge Notch Tension-Compression Specimens, Santosh B. Narasimha Chary

Graduate Theses and Dissertations

The American Society for Testing and Materials (ASTM) has recently developed a new standard for creep-fatigue crack growth testing, E 2760-10, that supports testing compact specimens, C(T), under load controlled conditions. C(T) specimens are commonly used for fatigue and creep-fatigue crack growth testing under constant-load-amplitude conditions. The use of these specimens is limited to positive load ratios. They are also limited in the amount of crack growth data that can be developed at high stress intensity values due to accumulation of plastic and/or creep strains leading to ratcheting in the specimen. Testing under displacement control can potentially address these shortcomings …

Assessment Of The Predictive Reliability Of A Swat Flow Model And The Evaluation Of Runoff Generation And Bmp Effectiveness In A Shale-Gas Impacted Watershed Using A Modeling Approach, Kwasi Asante

Graduate Theses and Dissertations

In order to ensure a harmonious harness of shale-gas resources while ensuring minimal damage to the environment, it is imperative that studies to conduct to inform various aspects of managing the environment. This includes the development of reliable hydrologic models to inform in decisions concerning water and the environment.

The first objective of this study was to evaluate the predictive reliability of the Soil and Water Assessment Tool (SWAT) model based on respective methods of LULC data classification and data type spatial resolution. Results showed that the high-resolution data classified with object-oriented image method does not provide any significant advantage …