Digital Commons Network^™

Tunable Compressive Mechanical Behavior Of Ice-Templated Materials, Sashanka Akurati

Mechanical & Aerospace Engineering Theses & Dissertations

The inherent hierarchical microstructural organization in natural materials is responsible for their excellent mechanical properties beyond that predicted by the simple rule-of-mixtures. Further exhibit synergy between strength and toughness, otherwise mutually exclusive in brittle materials. Conventional processing methods are unable to replicate hierarchical microstructures in engineering ceramics akin to that observed in natural materials. Ice-templating has emerged as a potential technique to fabricate bioinspired hierarchical materials. This process involves simultaneous unidirectional solidification and phase segregation of aqueous suspensions. Ice-templated porous ceramic materials have received significant attention for overcoming several limitations of conventional ceramic foams currently used in numerous engineering applications. …

Closing The Contextual And Chronological Gap: A Design And Development Study Of A Systematic Tool For The Selection Of Learning And Performance Support Interventions, James Knapp Iii

STEMPS Theses & Dissertations

Gaps in human performance resulting from a lack of skills and knowledge require solutions – interventions. The process of selecting the most effective intervention (solution) for closing a skills and knowledge gap—such as classroom training, e-Learning, Structured on-the-job Training (SOJT), or job-aid—is a fundamental and vital practice for Human Performance Technology (HPT) practitioners. Unlike other activities in the Performance Improvement/HPT (PI/HPT) model, the activity of intervention selection is ambiguous. Meaning, there is currently no systematic process or tool in place for selecting learning and performance-improvement solutions that is reflective of the learning science. Consequently, the critical activity of intervention selection …

Development Of Aptamer Rolling Circle Amplification Platform As A Vaccine Adjuvant To Control Salmonella In Broiler Chickens, Abigeal Iyabode Omolewu

Graduate Theses and Dissertations

Salmonella has been a major source of concern in public health and food industry. It is the cause of gastrointestinal illness and fever called salmonellosis. Severe cases of salmonellosis have resulted in hospitalization and even death around the world. Salmonella can be found in the intestinal tract of animals including chickens and can be transmitted to human through contaminated food. Hence, it is highly important to find ways of reducing the transmission of Salmonella from chickens to humans. This work is focused on the control of Salmonella in broiler chicken through the development of novel vaccine adjuvant. Two different aptamer …

In The Line Of Duty - A Documentary Film About Davis Duty And His Seeing Eye Dog, Paulina Sobczak

Graduate Theses and Dissertations

“In the Line of Duty” is a documentary film about Jeff Davis Duty, a man from a small town in Arkansas, who lost his sight at the age of five. He is the oldest Seeing Eye dog user in the world. At the age of 22, he was awarded a Fulbright Scholarship at the London School of Economics in England, as the first Fulbright Scholar with disability. Duty achieved great success in his career as a lawyer, leading a fulfilling and enjoyable life. The documentary film’s storytelling focuses on Duty’s life from his childhood to current times and presents all …

Screening For Our Fathers: Representations Of Native American Masculinity In American Film, Jeromy Duane Miller

Graduate Theses and Dissertations

In this work, I examine representation of Native American masculinity in the American film industry. The American film industry began just over a century ago, and one of its earliest subjects was the Native American. Throughout its history, the American film industry has maintained a steady trajectory of exploitation and erasure of Native American men and their subsequent masculine qualities. While there are notable historical outliers and critical exceptions in the 21st century, Native American men in film have been continually reduced to corpses, devoid of significant social presence, and denied meaningful explorations of their sexuality and interpersonal identity. The …

Genome-Wide Analyses Of Genomic Variation Regulating Differential Stress Responses In Japanese Quail, Steven Anthony Shumaker

Graduate Theses and Dissertations

As consumer demands for poultry grow, producers work to improve bird productivity in both meat and egg production. This endeavor is multifaceted, as many different factors play a part in influencing the productivity of birds, including environmental conditions, overall health, and genetic potential. One aspect controlled for in all aspects of poultry production optimization is stress management. Mitigation of stress is of primary concern to producers, as improper stress management can have many deleterious effects on chickens. Stress management requires an understanding of poultry stress responses and their physiological mechanisms, which can be more deeply understood through genomic analysis. Chapter …

Recombinant Production And Purification Of Green Fluorescent Protein (Gfp)-Fused Metal Binding Protein For Palladium Nanoparticle Synthesis, Shadrach Ibinola

Graduate Theses and Dissertations

In lieu of chemical and physical methods, biologically guided synthesis is increasingly used as a cost-effective medium for the fabrication of nanoparticles (NP). Recently, a palladium metal binding sequence Pd4 (TSNAVHPTLRHL) has been demonstrated to be instrumental in the production of palladium (Pd) nanoparticles. Although, by eliminating the additional cost of purification of the protein, the crude lysate of E. coli containing Pd specific protein has been proven to be a viable cost-effective means for the synthesis of Pd NP, studies have not be done to ascertain the comparative catalytic activity of nanoparticles synthesized from both clarified lysate and pure …

Should I Stay Or Should I Go? Compassion Organizing And The University Advancement Workplace, Christina Marie Smith

Graduate Theses and Dissertations

Compassion organizing has been described within positive organizational scholarship as an organization’s response to pain and suffering in organizational behavior and also the ability for organizations to flourish and promote joy and fulfillment in the workplace. Compassion organizing has been examined in organizational life through the four areas of noticing, feeling, acting, and sense-making. Previous research has focused on business and healthcare workplaces and has shown that compassion organizing is both an organizational and interpersonal social process. Because of the limited existing research on compassion organizing in the higher education workplace (and none with respect to the university advancement workplace), …

How Bad Do You Want It?: The Personal Motivation Of Joining A Sorority, Garry Butler

Graduate Theses and Dissertations

College campuses provide students with endless opportunities to become members of various student organizations that provide leadership, accountability, a sense of belonging, personal growth, and development. Many colleges have provided students with the opportunities to join social Greek fraternity and sorority organizations. The foundation of social fraternity and sorority organizations are built on principles such as sisterhood, brotherhood, scholarship, service, philanthropy, and leadership. Many traditional college-age women who desire to become members of a social sorority organization all participate in a formal recruitment process. There are various motivations that traditional college-age women have for joining social sororities on college campuses …

Parity-Time Symmetry In A Coherent Atomic Medium, Jingliang Feng

Graduate Theses and Dissertations

Parity-time (PT) symmetry has attracted considerable attention since optics was realized with the ability to provide a fertile platform for the exploration of PT symmetry. Although many of the previous researches on PT symmetry have been conducted in solid-state system and the network of fiber loops, coherent atomic medium offers another platform for the exploration of PT symmetry due to its easy reconfigurability and flexible tunability in parameters.

This dissertation mainly focuses on the investigations of the phenomena related to PT-symmetric optical lattice in a coherent atomic medium. First, a controllable photonic crystal with periodic Raman gain was constructed in …

The Effects Of Watching Text-Relevant Video Segments On Reading Comprehension Of Culturally Unfamiliar Texts With Adult English Language Learners Supported By The Schematic Information-Processing (Sip) Model Of Reading Comprehension, Amirreza Karami

Graduate Theses and Dissertations

The purpose of this mixed-methods sequential explanatory study was to investigate the effects of watching text-relevant video segments on reading comprehension of a culturally unfamiliar text when technical words are present or absent. Therefore, 44 adult English Language Learners (ELLs) with higher-intermediate to advanced English language proficiency levels from the Universidad Autónoma de Santo Domingo (UASD) School of Languages located in the Dominican Republic were chosen and randomly assigned to two different groups: control vs. experimental.

First, the researcher compared two different types of reading instruction—traditional text-based vs. video-based reading instruction supported by the Schematic Information-Processing (SIP) model of reading …

Site-Specific Effects Of Lysine Acetylation On Aminoacyl-Trna Synthetase, Hao Chen

Graduate Theses and Dissertations

Aminoacyl-tRNA synthetases (AARSs) are an ancient and highly conserved family of enzymes which can catalyze a two-steps aminoacylation reaction to charge tRNAs with their cognate amino acids, thus playing crucial roles in ribosomal protein synthesis. Naturally, the accurate amino acids and tRNA recognition of these synthetases are essential to the fidelity of translation process. To assure the correct recognition, some of these synthetases have evolved with an editing function to help remove the mischarged tRNAs. In addition to these functions, AARSs are also involved in various biological processes ranging from transcription to translation. Currently, a series of proteomic studies have …

Symbolism Or Substance: Factors Influencing Campus Messaging Decisions And Their Alignment With Institutional Values, Laura Herzog Jacobs

Graduate Theses and Dissertations

Historically, institutions of higher education (IHE) have been cautious and slow in making changes. Yet in today’s fast-paced and dynamic world of content availability and information flow generated by 24-hour news cycles and the ubiquity of social media present a challenging reality for colleges and universities in their public relations and communications approaches (Sands & Smith, 2000). Creating a harmonious and agile approach to managing these responsibilities against the backdrop of an incessant flow and public demand for information, including responses to national events often with seemingly little or no connection to the institution, suggested a need to examine the …

Optimization And Resistance Mitigation Of Dicamba And Glufosinate In Xtendflex® Crops, Grant Lawson Priess

Graduate Theses and Dissertations

The commercial launch of XtendFlex® crops enabled the use of dicamba, glufosinate, and glyphosate in-season. Utilizing herbicides that target different sites of action within troublesome weeds has been a tactic proposed to mitigate the likelihood of target-site resistance evolving; however, if interactions of the herbicides are detrimental to control of weedy species the likelihood of metabolic resistance increases. The objective of this research was to: 1) optimize efficacy and economic benefits of dicamba, glufosinate, and glyphosate; 2) characterize any interactions that were observed; 3) understand the mechanisms responsible for the reductions in weed control; 4) attempt to overcome interactions that …

Experimental And Computational Studies Of Electron Rich Alkenes, Alexa May

Graduate Theses and Dissertations

Thermal homolysis is one of the most fundamental reactions in organic chemistry. Free radical reactions are generally initiated by light or a radical initiator to generate the first radical, which can then propagate or terminate the reaction. Direct thermal homolysis requires no chemical initiators, just an increase in temperature depending on the homolysis energy.There are few studies of direct radical homolysis in complex systems or under mild conditions. The reactions involving C-N homolysis under mild conditions are reported in Chapter 1. Though the authors do not all propose a radical mechanism, we believe they can all be explained by a …

Lgbtq+ College Students' Perceptions Of Social Presence And Self-Disclosure In Online Learning: A Single-Case Study, Scott Anthony Wright

Graduate Theses and Dissertations

Social interaction among learners plays a significant role in online learning environments (Garrison, 2006; Kreijns et al., 2014; Mykota, 2017). The construct of social presence in online courses is important because it influences interaction and connectedness among learners and its effects on their learning outcomes and emotional well-being. Social presence at its essence refers to how an individual is perceived as a "real person" in an online environment (Gunawardena & Zittle, 1997). Online students must decide what aspects of their social identities they share in their interactions with their peers and instructors. Furthermore, LGBTQ+ students must negotiate what aspects of …

Investigation Of Histomoniasis Prevention In Poultry, Lesleigh Beer

Graduate Theses and Dissertations

Histomonas meleagridis is the etiological agent of histomoniasis, also commonly known as blackhead disease. This protozoal disease of poultry is detrimental to turkeys with flock mortalities often reaching 80-100%, although other gallinaceous birds are susceptible. Since the voluntary removal of nitarsone in 2015, the poultry industry is suffering with no approved prophylactics, therapeutics, or vaccines for this disease. The objectives of this dissertation were to evaluate multiple methods for prevention or control of histomoniasis, including dietary chemoprophylaxis and vaccination. Specifically, this research evaluated quinine as a chemoprophylactic candidate (Chapter 3) or live-attenuated H. meleagridis as vaccine candidates (Chapter 4) in …

Exploring How Counselor Educators Define, Assess, And Manage Student Disposition Throughout The Gatekeeping Process, Ryan Cowell

Graduate Theses and Dissertations

Professional disposition plays an important role in counselor-in-training (CIT) development. Disposition is defined as the attitudes, values, beliefs and behaviors that contribute to a becoming a professional (Spurgeon et al., 2012). In addition, disposition is an attribute that must be evaluated and remediated as a part of accreditation through the council for accreditation of counseling and related educational programs (CACREP). Despite, the importance of disposition in CIT development and the requirement from CACREP, there are several difficulties related disposition. First, there is not a universally accepted definition for disposition in counselor education. In addition, there are few psychometrically tested dispositions …

Stress Among Ncaa Division Ii Head Coaches, Dee Gerlach

Graduate Theses and Dissertations

The purpose of this quantitative study was to identify factors that create stress among head coaches at the National Association Athletic Association Division II level. Data was collected through a demographic questionnaire and the Coaching Issues Survey (CIS), a tool used to measure specific factors that may create stress among coaches. The factors of the CIS include four subscales: Athlete-Concerns, Time-Role, Program-Success, and Win-Loss. Participants (N=416) consisted of head coaches representing the following sports: baseball, men’s basketball, women’s basketball, men’s golf, women’s golf, men’s and women’s golf, softball, women’s tennis, and men’s and women’s tennis. The independent variables for this …

The Morphodynamic Interaction Of River Deltas And Their Marshes, Kelly M. Sanks

Graduate Theses and Dissertations

Globally, many of the largest river deltas contain vast marsh platforms that are currently threatened due to a combination of anthropogenic alterations to rivers and increasing relative sea level rise. Restoration and management plans for river deltas depend on optimizing riverine sediment accumulation in marsh platforms. However, the accumulation of organic material in marsh platforms is often neglected in predictive models and the interaction of ecogeomorphic processes governing marsh accumulation with the physical processes governing river delta growth is poorly understood.

Herein, I investigate this complex relationship through a combination of field and experimental studies. I show that in coastal …

A Song Of The Bluff: The Phoenix Of Pine Bluff Arkansas - Documentary, Neba Evans

Graduate Theses and Dissertations

Pine Bluff, Arkansas has long grappled with a reputation as a town riddled with crime and violence. Once a thriving agricultural center of the state, Arkansas residents tend to score the town’s successes as relics of the past. Economic decline, negative migration systems like white flight and brain drain, and racial disparities ties to the city’s roots has continued to take its toll on the city. Nonetheless, the community of Pine Bluff knows excellence has and continues to prosper there. A Song of the Bluff is a 15-minute documentary that seeks to flip the negative narrative by confronting these stereotypes …

Catalytic Activity Of Molybdenum-Dioxo Complexes, Randy Tran

Graduate Theses and Dissertations

This dissertation details the development of rationally designed dioxomolybdenum catalyst active for deoxydehydration (DODH), the net reduction of diols and polyols into alkenes and dienes. Catalyst design involved variations on dioxomolybdenum(VI) supported by a dianionic meridional pincer ligand. Rational substrate scope was explored using aliphatic diols, aromatic diols, and biomass derived diols. Various reductants were tested for ability to catalyze the reaction. The substrate specific mechanism of DODH was explored utilizing NMR and in-situ infrared spectroscopy and important rate constants and rate determining steps were found to aid in the optimization of ideal reaction conditions. Catalytic activity was observed to …

Automated Flight Controller Adaptive Compensation For Actuator Failures In Transport Type Aircraft, Daniel James Fresella

Graduate Theses and Dissertations

Aircraft operate over a wide range of conditions including atmospheric, weight, and center ofgravity changes. This presents a substantial challenge to automatic control system designers. When these operating conditions are merged with a partial or full control surface failure, automatic flight control is near impossible with conventional controllers. Additionally, when pilots experience control failure emergencies during flight, workload and fatigue increase drastically. The continued research of automatic flight control systems that can seamlessly adapt to unmodelled failures will enable a new generation of robust aircraft control. In this paper a 9th order 6 degree of freedom aircraft model is used …

Parenting The Gifted: Caregivers’ Perspectives Of Challenges And Their Confidence To Support Their Exceptional Children, Kristi A. Mascher

Graduate Theses and Dissertations

This phenomenological study uses Bandura’s theory of self-efficacy (1977) to examine the lived experiences of eight parents of gifted children and how their experiences, both positive and negative, shape their perception of their confidence and may contribute to building future supports for gifted parents and caregivers. Qualitative data, collected through semi-structured interviews and analyzed with an interpretive/hermeneutic lens, provides seven major themes derived from the voices of parents with children of varying ages and exceptionalities. In addition, this study concludes with a discussion surrounding the additional challenges associated with parenting the exceptional, frameworks for gifted parent support systems, as well …

Adapting Animals: Nineteenth-Century British Literature, Science, And Media, Kristen Layne Figgins

Graduate Theses and Dissertations

In the nineteenth century, Charles Darwin and other proponents of evolutionary theory provided a theoretical framework for discussing the question of humanity’s place in the world. These nascent theories emphasized the shared animal nature of humans and the nonhuman creatures who had once occupied a distinctly lower place on the chain of being. My dissertation addresses the question of how nineteenth-century scientific attitudes about animals were reflected in the literature of the period. By examining culture-texts from the nineteenth century, it is clear that literature was an active participant in extending scientific knowledge, often by playing with the blending categorical …

Yumiko Ōshima’S The Star Of Cottonland: A Translation, Sheena Woods

Graduate Theses and Dissertations

This is a translation of Volume 1 of Yumiko Ōshima’s The Star of Cottonland.

Sleeping With The Enemy: Examining The Relationship Between Sleep And Pain In Post-9/11 Veterans, John L. Schwartz Jr.

Psychology Theses & Dissertations

United States veterans are a diverse group of individuals, yet as a result of their service, they share a unique set of customs, traditions, and values. Post-9/11 veterans are more likely to experience elevated levels of pain and poor sleep quality compared to their civilian counterparts; however, little is known about how beliefs related to veterans’ pain impact their sleep and how levels of pain acceptance influence the sleep-pain association. This study examined relationships between sleep and pain in a sample of 102 post-9/11 veterans. Results support associations between pain and sleep identified in other populations. Positive correlations were found …

An Experimental Investigation Into The Impact Of Acute Stress On Alcohol Craving Through Implicit Coping Motives, Douglas J. Glenn

Psychology Theses & Dissertations

Drinking to cope with negative emotions is associated with many negative alcohol-related outcomes such as increased alcohol use, drinking-related problems, and alcohol use disorders. An acute stressor is one example of a stimulus leading to negative emotions that an individual may wish to avoid. Research has shown that acute stress positively relates to drinking. Specifically, previous experimental studies have shown that individuals exposed to a stressor drink more alcohol and have stronger urges to drink than those not exposed to a stressor. Thus, it may be that drinking to cope explains why people experience alcohol cravings after experiencing a stressor. …

The Influence Of Emotion Regulation And Neural Cognitive Control On Distress Tolerance, Alicia L. Milam

Psychology Theses & Dissertations

Tolerance of negative emotions has been associated with transdiagnostic negative mental health outcomes. Theory and research implicate emotion regulation and cognitive control as factors in tolerance of negative emotions. But their unique contributions to tolerance of negative emotions and interdependency have been unclear due to methodological limitations. This study aimed to explicate cognitive and emotional factors affecting distress tolerance in a non-clinical sample of emerging adults. Undergraduate psychology students completed self-report measures of emotion regulation ability and tolerance of negative emotions. The N2 ERP component elicited by a Go-NoGo task was also used as a neurophysiological marker of cognitive control …

A Meta-Analysis Of Three Years Of Data On Outcomes Of Therapy Groups For Inmates In The Virginia Department Of Corrections, Abie Carroll Tremblay

Counseling & Human Services Theses & Dissertations

The Virginia Department of Corrections (VADOC) is responsible for about 28,000 inmates and 66,000 probationers and parolees annually. Mental health services are often conducted through therapeutic groups, many of which are manualized and based in cognitive behavioral therapy theory. In the three years, 2017 through 2019, VADOC conducted 172 therapeutic group therapy studies, and the resulting data, in the form of t-test scores, were made available for academic research. This meta-analysis investigated whether cognitive behavioral group therapy produced superior outcomes when compared to other theoretical orientations in group therapy in VADOC, if manualized group therapy treatments produced superior outcomes when …