Digital Commons Network^™

Perceived Impact Of Character Education Program At A Midwest Rural Middle School: A Case Study, Sandra Jean Goss

Graduate Theses and Dissertations

Today there exist a concern for the safety and success of students in the public education system. Families, educators, and community members are concerned with the physical, emotional, and mental well-being of students in an environment where incidents of violence are growing. Events like the school shootings at Jonesboro, Arkansas, and at Columbine High School left our nation concerned with the problems within the school system. Many believe that character education can be an effective solution. The purposes of this study are to describe key elements of one school's character education program, and to determine the impact that this program …

Compared To What? The Effectiveness Of Synthetic Control Methods For Causal Inference In Educational Assessment, Clay Stephen Johnson

Graduate Theses and Dissertations

Synthetic control methods are an innovative matching technique first introduced within the economics and political science literature that have begun to find application in educational research as well. Synthetic controls create an aggregate-level, time-series comparison for a single treated unit of interest for causal inference with observational data. However, the strict statistical assumptions associated with matching methods for causal inference raise concerns for unobserved bias related to some data models and availability. The small but increasing set of existing synthetic controls studies with student achievement measures as the outcome of interest suggest that research is warranted into the effectiveness of …

Kirschner's Modal Ontological Argument, Andrew Kirschner

Graduate Theses and Dissertations

Ontological Arguments for the existence of God, first discovered by St. Anselm (1033-1109), attempt to deduce the existence of God from the concept of God. It is the aim of this thesis to champion a modal version of the Ontological Argument as philosophically sound by demonstrating it to be logically valid and by successfully defending the argument's premises as true. Kirschner's version of the Ontological Argument states:

P1 For every type of entity, instances of that type of entity either actually exist, merely possibly exist, or necessarily do not exist.

P2 If an entity can be conceived, then that entity …

A Wide Bandgap Silicon Carbide (Sic) Gate Driver For High Temperature, High Voltage, And High Frequency Applications, Ranjan Raj Lamichhane

Graduate Theses and Dissertations

The potential of silicon carbide (SiC) for modern power electronics applications is revolutionary because of its superior material properties including substantially better breakdown voltage, power density, device leakage, thermal conductivity, and switching speed. Integration of gate driver circuitry on the same chip, or in the same package, as the power device would significantly reduce the parasitic inductance, require far less thermal management paraphernalia, reduce cost and size of the system, and result in more efficient and reliable electrical and thermal performance of the system.

The design of a gate driver circuit with good performance parameters in this completely new under-development …

Understanding Faculty And Non-Traditional Student Perceptions Of Self-Directed Learning In A Practical Nursing Program, Carmen Marie Rogers

Graduate Theses and Dissertations

This study was designed to identify and investigate nursing faculty and student perspectives of self-directed learning in a practical nursing program. It also explored the degree to which student's perceptions of self-directed learning exhibited factors consistent with that of critical thinking. This study is important because self-directed learning and its critical thinking elements are essential in providing safe, competent, effective, and efficient nursing care within practice and education. Using an explanatory case study design the practice of self-directed learning within a practical nursing program was examined through the use of: classroom observations, interviews with nursing faculty, nursing students, and document …

Microfluidics Guided By Redox-Magnetohydrodynamics (Mhd) For Lab-On-A-Chip Applications, Vishal Sahore

Graduate Theses and Dissertations

Unique microfluidic control actuated by simply turning off and on microfabricated electrodes in a small-volume system was investigated for lab-on-a-chip applications. This was accomplished using a relatively new pumping technique of redox-magnetohydrodynamics (MHD), which as shown in this dissertation generated the important microfluidic features of flat flow profile and fluid circulation. MHD is driven by the body force, FB = j × B, which is the magnetic part of the Lorentz force equation, and its direction is given by the right hand rule. The ionic current density, j, was generated in an equimolar solution of potassium ferri/ferro cyanide by applying …

Identification Of Biomarkers Associated With Ascites Incidence In Broilers, Kaylee Rowland

Graduate Theses and Dissertations

Poultry is key in genetic research due to breeding feasibility, relatively short generation interval, and distinct phenotypes. It is estimated that 8% of broiler deaths annually can be attributed to ascites, an economically important disease that has been challenging the industry for the past 2 decades. Genetically selected ascites resistant (RES) and susceptible (SUS) chicken lines have been established and maintained by the University of Arkansas, Fayetteville. Intensive research efforts have been made to reveal physiological and biochemical characteristics for the incidence of ascites. Since the whole genome of the major ancestral chicken, the Red Jungle Fowl, has been sequenced, …

Physical And Biochemical Factors Affecting Breast Fillet Tenderness In Broilers Reared For Divergent Market Demands, Valerie Belle Brewer

Graduate Theses and Dissertations

Market trends have dictated that broilers be reared for divergent market demands for decades. Also, broiler genetic strains have been adapted to meet market demands which include: genetic selection for improved breast meat, the practice of growing birds to older ages and greater market weights to meet demands, and decreasing postmortem (PM) aging time to improve processing efficiency and fillet yield. These production practices can also affect product quality, specifically boneless breast fillet tenderness and water-holding capacity. To address these factors, a series of experiments were conducted to determine the effect of strain and slaughter age on meat quality parameters, …

Investigation Of The Effects Of Rapid Thermal Annealing On Mbe Grown Gaasbi/Gaas Heterostructures For Optoelectronic Devices, Perry C. Grant

Graduate Theses and Dissertations

High efficiency optoelectronic devices rely on high quality materials making up the device structure. The scope of this thesis investigates the effectiveness of rapid thermal annealing (RTA) at improving the material quality of GaAsBi/GaAs heterostructures. During the fabrication of a device, the contacts of the device had the rapid thermal annealing process accomplished to produce ohmic contacts and this research explored if this annealing treatment degraded the quantum wells that made up the active region of a device. To investigate these effects, a system to measure the photoluminescence of the material system was constructed utilizing Fourier Transform Infrared Spectroscopy. The …

A Comparison Of Nebulized Vitamin B12 Versus Oral Vitamin B12 Supplementation, Terry L. Williams Jr.

Graduate Theses and Dissertations

Vitamin B12 is important for various processes in the human body including DNA synthesis, red blood cell production, energy production, fatty acid synthesis, and for the conversion of homocysteine into methionine. Vitamin B12 deficiency is becoming more prevalent. The purpose of this study was to evaluate if a different route of administration, i.e. nebulization, was a viable option for increasing serum levels of vitamin B12 in both exercisers and non-exercisers. The increasing number of people that are vitamin B12 deficient is due to several factors including medication use, elective gastric bypass surgery, and an increasing elderly population. There are currently …

Greater Sage-Grouse (Centrocercus Urophasianus) Habitat Selection In Northwestern Wyoming And Stable Isotope Analysis Of Fecal Material, Andrea Renee Green

Graduate Theses and Dissertations

Dramatic range-wide declines in Greater Sage-Grouse populations have prompted efforts to determine habitat characteristics that are selected by sage-grouse for foraging, nesting and brood-rearing areas in an effort to conserve this species. Managers at Heart Mountain and Y U Bench in northwestern Wyoming expressed the need to quantify various habitat characteristics and to determine key use areas at both study sites. Data were collected on a variety of habitat variables in spots selected by grouse for foraging, nesting, and brood-rearing activities. These variables were compared to the same variables measured at random points at both study sites. Significant differences existed …

The Mechanisms Of Interpersonal Privacy In Social Networking Websites: A Study Of Subconscious Processes, Social Network Analysis, And Fear Of Social Exclusion, Bryan I. Hammer

Graduate Theses and Dissertations

With increasing usage of Social networking sites like Facebook there is a need to study privacy. Previous research has placed more emphasis on outcome-oriented contexts, such as e-commerce sites. In process-oriented contexts, like Facebook, privacy has become a source of conflict for users. The majority of architectural privacy (e.g. privacy policies, website mechanisms) enables the relationship between a user and business, focusing on the institutional privacy concern and trust; however, architectural privacy mechanisms that enables relationships between and among users is lacking. This leaves users the responsibility to manage privacy for their interpersonal relationships. This research focuses on the following …

The Development Of A Traumatic Brain Injury Bioreactor, Zachery Heller

Graduate Theses and Dissertations

Approximately 1.7 million Americans experience a traumatic brain injury (TBI) each year. Concussive injuries are a subset of TBI in which blows to the head cause the brain to collide against the interior of the skull. Damage to the neurons, supporting cells, and surrounding extra cellular matrix resulting from these collisions can lead to permanent physical, cognitive, and psychological impairment. We believe the prevalence and clinical significance of concussive injures warrants research investment. To study brain injury following TBI, in vivo models have been the gold standard for TBI experiments. Although a valuable research alternative, animals are expensive, raise ethical …

The Managerial Activities And Leadership Roles Of Five Achieving The Dream Leader College Presidents, Teresa Marie Mace

Graduate Theses and Dissertations

A significant increase in community colleges' (CC) presidential retirements is resulting in a huge loss of critical knowledge and experience. Recognition of this has led to numerous efforts and initiatives to prepare future community college leaders. These efforts have included numerous attempts to identify the competencies, skills, and leadership traits considered essential to performing the president's job. Unfortunately, most of the topics identified in self-reported assessments and personal interviews were not based on actual observations of what successful presidents do.

Unlike studies about community college presidents over the last 30 years, this study utilized Henry Mintzberg's (1968) structured observation methodology …

Congruent And Incongruent Effects Of Ethnic Music On Ethnic Menu Item Selection, Ryan David Muniz

Graduate Theses and Dissertations

This study investigated what impact ethnic music had on ethnic menu item selection. College students were randomly divided into three groups and listened to one randomly assigned sound treatment in sensory booths. Three hundred and five participants completed the questionnaire with measures of expected price value and willingness to pay value. One of the groups listened to an Italian folk music, the second group listened to a Thai folk music, and the third group listened to a restaurant background noise in order to examine if the music will impact each participant menu items selection and perceived price values. The result …

Criteria For Initial Appointment In Rank And Subsequent Promotion For Faculty In Two-Year Public Colleges, Michael Aaron Orf

Graduate Theses and Dissertations

The growth of community colleges over the last five decades has not been met with a commensurate expansion of knowledge about policy development. In order to address this gap in knowledge, this study aimed to determine the prevalence of rank among two-year colleges in the United States; to identify the criteria used to determine rank upon hire for transfer and vocational faculty; to identify the criteria used to determine promotion for transfer and vocational faculty; and to determine if there are differences in criteria between transfer faculty and vocational faculty at initial appointment and subsequent promotion. Additionally, the study sought …

The Impact Of Cognitive Behavior Techniques On The Vocational Identity Of Persons With Disabilities Receiving Ssi/Ssdi Benefits, James Joseph Quinn

Graduate Theses and Dissertations

This study examines the effects of Cognitive Behavior Therapy (CBT) on the vocational identity, self-efficacy, and vocational satisfaction of persons with disabilities receiving SSI/SSDI. This study was carefully planned to help persons with disabilities obtain employment. A review of the relevant literature was used to determine the need for the study and to support the study. Forty participants, all were enrolled into a vocational rehabilitation program were selected for the study. Threats to internal and external validity were taken into consideration and controlled for. They received CBT as a treatment intervention to change their beliefs and irrational thoughts about the …

Occupying The Pedestal: Gender Issues In Ellen Gilchrist, Karon Reese

Graduate Theses and Dissertations

Ellen Gilchrist's works shows the struggles of women living in a postmodern South. This dissertation explores Gilchrist's representations of southern women as they transition from the old South to modernity. Gilchrist's work depicts women who attempt to break off the pedestal of white Southern womanhood, but never quite do, often simultaneously disrupting and confirming traditional notions of a "good Southern lady." Gilchrist shows how women occupy the pedestal as a form of refuge and also as a form of protest. These are women who, as they navigate the transition to a new South, are reluctant to surrender the privilege of …

Relationships Between Landscape Factors And Crayfish Density And The Interacting Effects Of Grazing And Increased Sedimentation On Algal Biomass, Katheryn Haley Rose

Graduate Theses and Dissertations

In recent years in the United States there has been a rapid expansion in anthropogenic sources of sediment in streams including construction, agriculture, and drilling for natural gas. Potential effects land disturbance associated with activities from natural gas development on aquatic biota in surrounding streams have not yet been well documented. An increase in inorganic sediment in streams can be detrimental to organisms through a variety of mechanisms including alteration of dominant substrate type, higher turbidity resulting in lower visibility, and burial of food resources such as algae and detritus. Increasing sedimentation in stream environments through anthropogenic disturbance is a …

Design, Fabrication And Characterization Of Plasmonic Fishnet Structures For The Enhancement Of Absorption In Thin Film Solar Cells, Sayan Seal

Graduate Theses and Dissertations

Incorporating plasmonic structures into the back spacer layer of thin film solar cells (TFSCs) is an efficient way to improve their performance. The fishnet structure; which is a tunable, plasmonic light scatterer is used to enhance light absorption. Unlike other plasmonic particles that have been previously suggested, the fishnet is an electrically connected wire mesh and does not result in electric field localization, hence it results in greater absorption in the intrinsic Si layer. Unlike other designs, the fishnet structure is placed in the back spacer layer of the TFSC, so it does not block any incident light. There is …

An Open Source, Line Rate Datagram Protocol Facilitating Message Resiliency Over An Imperfect Channel, Christina Marie Smith

Graduate Theses and Dissertations

Remote Direct Memory Access (RDMA) is the transfer of data into buffers between two compute nodes that does not require the involvement of a CPU or Operating System (OS). The idea is borrowed from Direct Memory Access (DMA) which allows memory within a compute node to be transferred without transiting through the CPU. RDMA is termed a zero-copy protocol as it eliminates the need to copy data between buffers within the protocol stack. Because of this and other features, RDMA promotes reliable, high throughput and low latency transfer for packet-switched networking. While the benefits of RMDA are well known and …

Steady-State Switching And Dispersion/Absorption Spectroscopy Of Multistate Atoms Inside An Optical Ring Cavity, Jiteng Sheng

Graduate Theses and Dissertations

This thesis mainly focuses on the experimental investigations of electromagnetically induced transparency (EIT) related phenomena in various systems involving multilevel atoms inside an optical ring cavity. Semiclassical methods, e.g. density-matrix equations, are used through out this thesis to simulate the experimental results. First, the cavity transmission spectrum can be significantly modified when multilevel atoms are placed inside an optical ring cavity. Such coupled atom-cavity systems are well explained by the intracavity dispersion/absorption properties. Specifically, three-level lambda-type, four-level N-type and double-lambda-type atoms inside an optical ring cavity are investigated by examining their cavity transmission spectra. Second, optical multistability (OM) has been …

Contributing Factors That Affect The Achievement Of African-American Females Taught By Caucasian Teachers On The Arkansas Literacy Exam: A Case Study, Felicia Renee Smith

Graduate Theses and Dissertations

This qualitative intrinsic case study was designed to assist Caucasian educators with the researched academic skills and behaviors to engage African-American females in the learning environment. The study provided strategies and recommendations to promote self-worth, self-motivation, self-efficacy, and morale in African-American females when they did not perform as well as or higher than their Caucasian peers in a high school English classroom on the state literacy examination instructed by a Caucasian teacher. The research site was a low socioeconomic urban high school with a majority of minorities with several native based home languages. The study took an in-depth approach to …

Monodentate, Bidentate And Photocrosslinkable Thiol Ligands For Improving Aqueous Biocompatible Quantum Dots, Hiroko Takeuchi

Graduate Theses and Dissertations

Water-soluble Quantum Dots (QDs) are highly sensitive fluorescent probes that are often used to study biological species. One of the most common ways to render QDs water-soluble for such applications is to apply hydrophilic thiolated ligands to the QD surface. However, these ligands are labile and can be easily exchanged on the QD surface, which can severely limit their application. As one way to overcome this limitation while maintaining a small colloidal size of QDs, we developed a method to stabilize hydrophilic thiolated ligands on the surface of QDs through the formation of a crosslinked shell using a photocrosslinking approach. …

Towards The Total Synthesis Of Antascomicin B. Efforts To Construct The C1-C21 Fragment, Juliette Rivero-Castro

Graduate Theses and Dissertations

Antascomicin B is a macrolide isolated from a strain of Micromonospora. It possesses structural similarities to FK506 and rapamycin and exhibits potent binding ability to FKBP12. Recent reports suggest that small molecule ligands of FKBP12 possess potent neuroprotective and neurodegenerative properties in mouse models of Parkinson's disease. Our approach to the C1-21 fragment of antascomicin B involves an asymmetric amino-Claisen rearrangement originally developed by Tsunoda et al.35 report the scalability of the preparation and rearrangement of an allylic amide possessing a silyloxy group at the terminal position of the alkene. The Tsunoda-Claisen rearrangement uses inexpensive (S)-α-methylbenzylamine as the chiral …

Tin Sensitization For Electroless Plating, Xingfei Wei

Graduate Theses and Dissertations

The tin sensitization process has been used in electroless plating since 1940s Brenner and Riddell developed the electroless plating for surface metallization method. It was found to be an interesting topic to study tin sensitization for chemically controlling metal deposition on different substrates, because the tin sensitization process had critical effects on the electroless plated metal thin films. Nowadays electroless plating metal deposition is still an important method for depositing metals. It has a few advantages over the vapor deposition and electrodeposition method, such as work in an ambient condition, on nonconductive substrates, and without extra power input. Applying electroless …

Identifying Emerging Researchers Using Social Network Analysis, Syed Masum Billah

Graduate Theses and Dissertations

Finding rising stars in academia early in their careers has many implications when hiring new faculty, applying for promotion, and/or requesting grants. Typically, the impact and productivity of a researcher are assessed by a popular measurement called the h-index that grows linearly with the academic age of a researcher. Therefore, h-indices of researchers in the early stages of their careers are almost uniformly low, making it difficult to identify those who will, in future, emerge as influential leaders in their field. To overcome this problem, we make use of Social network analysis to identify young researchers most likely to become …

Political Motive And Bail: The Effect Of Prosecutorial Strategies On Pretrial Decisions In Federal Terrorism Trials, Michael John Clanton

Graduate Theses and Dissertations

The purpose of this study is to understand how prosecutorial strategies affect pretrial decisions in U.S. terrorism trials and how pretrial decisions in turn affect the disposition of those trials. This research builds off of the work of Smith and Damphousse (1996) which compared terrorism indictees to traditional federal offenders. They found that the use of explicit politicality as a prosecution strategy was a significant predictor of both disposition and the sentence length in terrorism trials. This study focuses on the question of whether the use of an explicitly political prosecution strategy impacts pretrial decisions in terrorism cases and whether …

The Color And Consistency Of Steaks And Ground Beef Produced From Mature Bulls, Jace Joseph Hollenbeck

Graduate Theses and Dissertations

Two experiments were conducted to compare the color and cooked attributes of steaks and ground beef produced from mature bulls. Beef from mature bulls was used to test the effects of lactic acid (LA) enhancement solution pH (2.5, 3.0, or 3.5; B25, B30, B35, respectively) on fresh (5 d of display) and cooked color and tenderness of strip loin steaks (Exp. 1) and the effect of high pH trim on precooked ground beef patties (Exp. 2). In experiment 1, mature bull strip steaks were enhanced to 111% with a LA, sodium bicarbonate, and tap water solution, in comparison to USDA …

The Relationships Between `Push' And `Pull' Factors Of Millennial Generation Tourists To Heritage Tourism Destinations: Antebellum And Civil War Sites In The State Of Arkansas, Kayla Diane Kesterson

Graduate Theses and Dissertations

This study investigated `push' and `pull' motivational factors which influence Millennial Generation tourists' decisions to visit heritage tourism destinations and their knowledge of Civil War and Antebellum heritage sites within the state of Arkansas. A descriptive, six-section survey was distributed to Millennial students from varying degree fields at three universities within Arkansas. Four hundred twenty-four participants completed the questionnaire with measures of demographic information, visitation and frequency to heritage tourism sites, push factors, pull factors, heritage tourism sites in Arkansas, and historic preservation participation.

The results of this study showed that although Millennial students do not visit heritage sites frequently, …