Digital Commons Network^™

The Same River Twice, Claire Remy Pincumbe

Graduate Theses and Dissertations

This thesis is a portion of a novel written during my time at the University of Arkansas.

Body Mass And Body Condition Variation Of Mallards (Anas Platyrhynchos) Within And Among Winters Within The Lower Mississippi Alluvial Valley, John Thompson Veon

Graduate Theses and Dissertations

Most North American waterfowl overwinter in southern North America before migrating back to breeding grounds in the northern US and Canada. These species face the challenge of needing to maintain or increase their body mass during an environmentally difficult winter period. Successful body mass maintenance during the winter period has major ramifications not only for their winter survival but for their fitness across the entire year. Recent research in Europe and the western United States suggests that the body mass of mallards (Anas platyrhynchos) has increased from the late 1960s to early 2000s. However, the factors responsible for increases in …

Just Benjamin, Paige R. Murphy

Graduate Theses and Dissertations

This documentary short film is about a now 30-year-old transgender man telling his story of growing up queer in a small Arkansas town, from being outed as a lesbian in high school, to ultimately being accepted as a trans man by members of his military and biological families. Benjamin “Benji” Davis grew up in the small town of Friendship, Arkansas, enlisted in the U.S. Army shortly after high school and served for six years, then came back to Arkansas and primarily lived in Little Rock until he moved to Denver, Colorado this fall. The documentary is structured linearly both with …

Development And Characterization Of Monolayer And Sub-Monolayer Intermediate Band Solar Cells, Najla Alnami

Graduate Theses and Dissertations

Intermediate band solar cell (IBSC) is a new generation solar cell that is designed to overcome the main limitation of solar cell power conversion efficiency, which is the non-absorption of low photon energy. Experimental efforts towards fabricating high efficiency and low cost IBSC have not met the predictions of theoretical analysis. Existing implementations of the IBSC design using conventional Stranski-Krastanov (S-K) quantum dots (QDs) have resulted in a degradation in the solar cell device characteristics, which has been found to be caused by recapturing or trapping of excess carriers, low intermediate band material absorption, and increased recombination in the solar …

Does Self-Reference In Concept Mapping Influence Transfer?, Daniel A. Parker

Graduate Theses and Dissertations

Concept maps are a popular learning activity that have successfully demonstrated student learning outcomes. Research suggests that concept mapping has a positive effect on recognition, recall, and transfer. Likewise, researchers in cognitive psychology have shown the value of referencing oneself with a concept. Known as the self-reference effect, learners who connect their experiences or traits with new knowledge are more likely to remember that knowledge than if they used other mnemonic devices. Previous research suggests that integrating self-reference in concept mapping may improve recall. However, to date, no study has investigated the influence of this combination on higher order learning …

Two-Dimensional Black Phosphorus For Terahertz Emission And Near-Field Radiative Heat Transfer, Mahmudul Hasan Doha

Graduate Theses and Dissertations

The main focus of this work is to investigate two potential optical and optoelectronic applications of black phosphorus (BP): the near-field radiative heat transfer in plasmonic heterostructures with graphene and terahertz emission from multi-layer BP photoconductive antennas. When the separation distance between graphene-black phosphorene is much smaller than or comparable to the thermal wavelength at different temperatures, a near-field radiation heat transfer breaks the Planck blackbody limit. The magnitude of the near-field radiation enhancement acutely depends on the gate voltage, doping, and vacuum gap of the graphene and BP pair. The strong near-field radiation heat transfer enhancement of the specific …

Gaas Growth On Sapphire Substrates (C And R Plane) For Integrated Microwave Photonics (Imwp), Samir Kumar Saha

Graduate Theses and Dissertations

The microwave signal processing in the optical domain creates new opportunities for information and communication technology (ICT) and networks by increasing speed, bandwidth, and processing capability. IMWP incorporates the functions of microwave photonics components/subsystems in monolithic or hybrid photonic circuits to meet future needs. Sapphire platforms have the potential to integrate all-in-one, for instance, light source, analog signal processing, light detection, CMOS control circuit, silicon on sapphire to achieve high-performance, low-cost mixed-signal optical links etc. Molecular beam epitaxy (MBE) has been used to grow GaAs on sapphire substrates to integrate optoelectronic devices in the same platform.

The initial stage of …

Remixed, Remastered: Investigating Organizational Adaptation In Higher Music Education, Jacob Bruce Hertzog

Graduate Theses and Dissertations

Higher music education presents a unique opportunity to examine change within higher education due to the digital revolution in the music industry over the past two decades. The purpose for conducting this study was to describe, map, and explain the strategies that higher music education programs are using to adapt to the digital revolution in the music industry. This study was grounded in organizational adaptation theory, drawing upon nine well-established theories: population ecology, life cycles, strategic choice, isomorphism, symbolic action, resource dependence, cybernetics, and network theory. Critical concepts of the turbulent environment, environmental perception, and organizational adaptation strategy emerged from …

Teacher And Staff Perception Of School Climate: A Case Study, Michael Shane Hampton

Graduate Theses and Dissertations

The purpose of this study is to determine how different public-school teachers and staff perceive school climate at an achieving public middle school. The research sought to find relationships between teacher sub-groups and other staff members, and how they perceived the school climate, either negatively or positively. The researcher believed that there would be a positive perception of school climate, which coincided with high student achievement. Additionally, it was believed that there would be no relationship between teacher types or demographics, and how the climate would be perceived among the different groups. This paper also presents a review of the …

Advising Student Veterans In Higher Education, Brett Edward Rankin

Graduate Theses and Dissertations

Student veterans are a growing population in higher education with over 650,000 veterans using education benefits in 2018. Student veterans are enrolling in colleges of all types, and many institutions have support services designed for them specifically. In most cases these support services are limited to veteran centers where officials certify credit hours for financial benefits and do not offer services to help them fully assimilate into higher education. Student veterans bring a wide range of life experiences, culture, and work ethic to college campuses which serves to build and diversify the student body. However, veterans have reported feeling isolated …

Optimization Of Nitrogen Removal Rate In One-Stage Reactor Through Partial Nitrification Anammox Process During Direct Treatment Of Poultry Litter Wastewater, Yiting Xiao

Graduate Theses and Dissertations

Anammox is an increasingly common process used for the treatment of reject water and even mainstream wastewater due to its low oxygen demand. However, anammox is not commonly utilized in the direct treatment of poultry litter because of the high organic content, which would inhibit the anammox process. Thus, this project is aimed at optimizing the nitrogen removal rate through partial nitrification anammox process (PN/A) to treat synthetic poultry litter wastewater. Nitrogen removal efficiencies will therefore be improved through optimizing the combination of three operating parameters including hydraulic retention time (HRT), dissolved oxygen (DO) concentration, and carbon to nitrogen (C/N) …

An Assessment Of The Neurovascular Structures Of The Trigeminal Nerve And Their Relationship To Diet In Primates, Caitlin Yoakum

Graduate Theses and Dissertations

The inferior alveolar nerve (IAN) enters the mandible via the mental foramen, supplies nervous sensation to the mandibular teeth as it travels through the mandibular canal, and exits the mandibular foramen to send information to the brain to maintain chewing cycles and protect the teeth from damage. Although bony canals and foramina have been shown to form around soft-tissue structures, there are some examples (e.g., the hypoglossal nerve/canal) where the nervous structures do not comprise most of the canal/foramina space. It is important to know the size of nerves because it has been established that larger nerves convey more information …

Canine Microwear In Relation To Diet In Sumatran Primates And African Great Apes, Putu Pujiantari

Graduate Theses and Dissertations

This thesis considers canine microwear in relation to diet in five Sumatran primates (Pongo abelii, Hylobates lar, Hylobates agilis, Presbytis thomasi, and Macaca fascicularis) and two African great apes (Pan paniscus and Pan troglodytes schweinfurthii) using both microwear texture analysis and microwear feature analysis techniques. Statistical results for texture analysis show that there are significant differences in scale of maximum and heterogeneity. This indicates that some species have large pits on their canine surfaces, having these dominated by deep features at coarse scale yet have a slight microwear heterogeneity. For feature analysis, all variables show statistically significant variation. Variance in …

Alone Together: The Experiences Of Lgbtqia+ Undergraduates At Faith-Based Colleges, Jennifer Edwards

Graduate Theses and Dissertations

This qualitative study aimed to explore the experiences of LGBTQIA+ alumnix who attended faith-based colleges. The study was guided by Strayhorn’s (2019) College Students’ Sense of Belonging Theory and Abes’ et al. (2007) Reconceptualized model of multiple dimensions of identity. The scope of experiences explored was narrowed to three of the five categories in Schreiner’s (2010a) Thriving Quotient. These categories were: positive perspective (outlook on life), social connectedness, and diverse citizenship.

The study included 11 participants from 7 faith-based colleges and represented various intersections of sexual and gender identity. The study employed constructivist grounded theory methodology, an inductive research approach …

Reducing Dietary Crude Protein: Characterization Of Branched-Chain Amino Acid Antagonism In Modern Broiler Chickens, Craig William Maynard

Graduate Theses and Dissertations

Reducing the crude protein content of broiler diets while maintaining performance has been a primary research area in nutrition. During the late 20th century, the bulk of this research has involved supplementing broiler diets with feed-grade amino acids and proving the economic benefits of their additions. To date, widespread adoption of feed-grade amino acids is limited to methionine, lysine, threonine, and to some extent valine. With valine and isoleucine gaining prevalence in commercial formulation, classic data on the antagonisms associated with the branched-chain amino acids has returned to the forefront of practical broiler nutrition research. Therefore, a series of 23 …

Precise Nitrogen Recommendations Improve Economic And Environmental Outcomes In Arkansas Rice Production, Cristin Roberts

Graduate Theses and Dissertations

Soil testing has become an increasingly important tool in making agronomically efficient production management decisions. N-STaR is a N test used in rice production and is unique in its ability to selectively quantify soil organic-N compounds which are readily mineralizable for plant N uptake and contribute to growth and yield. This study uses historical (2002–2018) adoption rates of N-STaR, which is funded through Rice Checkoff funds, to calculate the total cost savings from N-STaR adoption. These cost savings alone would be the “typical” benefits used in a benefit-cost ratio of a public ally funded research program like N-STaR. However, we …

Design, Extraction, And Optimization Tool Flows And Methodologies For Homogeneous And Heterogeneous Multi-Chip 2.5d Systems, Md Arafat Kabir

Graduate Theses and Dissertations

Chip and packaging industries are making significant progress in 2.5D design as a result of increasing popularity of their application. In advanced high-density 2.5D packages, package redistribution layers become similar to chip Back-End-of-Line routing layers, and the gap between them scales down with pin density improvement. Chiplet-package interactions become significant and severely affect system performance and reliability. Moreover, 2.5D integration offers opportunities to apply novel design techniques. The traditional die-by-die design approach neither carefully considers these interactions nor fully exploits the cross-boundary design opportunities.

This thesis presents chiplet-package cross-boundary design, extraction, analysis, and optimization tool flows and methodologies for high-density …

Investigation Of Iron-Nickel Films Based Catalysts: Controlling Hydrogen Evolution Reaction (Her) Through An Electrode-Electrolyte Engineering Approach, Sergio Ivan Perez Bakovic

Graduate Theses and Dissertations

Electrochemical energy conversion technologies need to be economically viable in order to be adopted. Earth-abundant transition metals (i.e., Fe, Co, and Ni) have attracted attention due to their high availability, low cost, and catalytic characteristics that are in many cases found in and exploited by nature. Herein, we synthesize FexNi100-xOy electrocatalyst films and study how the electrocatalyst-electrolyte interactions alter the hydrogen evolution reaction (HER).In this work, FexNi100-xOy films were synthesized to study the composition, chemical state, and morphology. Characterization results provided a well-established electrocatalyst film platform to then proceed with electrochemical evaluations. The effects of the electrode composition and electrochemically …

Unmasc: Tumor-Only Variant Calling With Unmatched Normal Controls, Paul Little, Heejoon Jo, Alan Hoyle, Angela Mazul, Xiaobei Zhao, Ashley H Salazar, Douglas Farquhar, Siddharth Sheth, Maheer Masood, Michele C Hayward, Joel S Parker, Katherine A Hoadley, Jose Zevallos, D Neil Hayes

2020-Current year OA Pubs

Despite years of progress, mutation detection in cancer samples continues to require significant manual review as a final step. Expert review is particularly challenging in cases where tumors are sequenced without matched normal control DNA. Attempts have been made to call somatic point mutations without a matched normal sample by removing well-known germline variants, utilizing unmatched normal controls, and constructing decision rules to classify sequencing errors and private germline variants. With budgetary constraints related to computational and sequencing costs, finding the appropriate number of controls is a crucial step to identifying somatic variants. Our approach utilizes public databases for canonical …

Corneal Perforation In Ocular Graft-Versus-Host Disease, Cathy Y Zhang, Asim V Farooq, George J Harocopos, Eric L Sollenberger, Joshua H Hou, Charles S Bouchard, Christine Shieh, Uyen L Tran, Anthony J Lubniewski, Andrew J W Huang, Grace L Paley

2020-Current year OA Pubs

PURPOSE: Corneal perforation is a rare, vision-threatening complication of ocular graft-versus-host disease (GVHD) and is not well understood. Our objective was to examine the clinical disease course and histopathologic correlation in patients who progressed to this outcome.

METHODS: This study is a retrospective case series from four academic centers in the United States. All patients received a hematopoietic stem cell transplant (HSCT) prior to developing ocular GVHD. Variables of interest included patient demographics, time interval between HSCT and ocular events, visual acuity throughout clinical course, corticosteroid and infection prophylaxis regimens at time of corneal perforation, medical/surgical interventions, and histopathology.

RESULTS: …

Black Women's Perceptions Of The Experiences, Challenges And Barriers Leading To Senior-Level Leadership Positions In Higher Education, Latisha L. Marion

Electronic Theses and Dissertations

This dissertation explored the lived experiences of Black women as they progressed in their careers to senior-level leadership positions in higher education. Using interpretative phenomenology analysis, this study specifically explored how Black women perceived their experiences, challenges and barriers leading to them obtaining senior-level leadership roles. Prior literature on the advancement of Black women leaders identified that women who fit the category of Black undergo extreme challenges, including the angry Black woman stereotype, concrete and glass ceilings, tokenism, colorism, imposter syndrome, and sexism. The findings from this study validate the literature as many of the themes produced in this study …

An Exploration Of Teachers’ Perceptions And Experiences Serving Students Of Incarcerated Parents In A Rural Setting, Melissa P. Phelan

Electronic Theses and Dissertations

Abstract

The increase in the United States prison population over the past several years has precipitated a record number of children in the public school system with incarcerated parents. Consequences of this trend have recently been given significant attention by researchers due to the myriad of difficulties noted to be associated with parental incarceration. The purpose of this qualitative case study was to explore the perceptions, experiences, and insights of educators in a small rural district in Texas as they serve students experiencing parental incarceration. Presentation of an educator in context schema was provided by the application of Bronfenbrenner’s ecological …

Implementing Mindfulness Meditation To Reduce Nurse Burnout, Jannelle V. Sanchez

Electronic Theses and Dissertations

Abstract

There will be an estimated shortage of 100,000 nurses by the year 2022, with 500,000 seasoned nurses retiring. The nursing profession has recently experienced a devastating pandemic that left no time to combat the detrimental effects of burnout, specifically for intensive care nurses, who are the frontline workers of a physically and psychologically draining working environment conducive to burnout. Nurses experience burnout for a mixture of reasons, but mainly it is due to the lack of interventions to help them combat the disease. Mindfulness meditation represents an interventional tool that has been shown to reduce the negative stressors associated …

Exploration Of Strategies Of Teacher Leaders For Responding To Students Experiencing Trauma Framed In Casel's Social And Emotional Learning Theory, Kimberly Dionne Parrott

Electronic Theses and Dissertations

The purpose of this qualitative instrumental case study was to explore strategies for supporting students experiencing trauma as perceived by teacher leaders framed in CASEL’s social and emotional learning theory. A descriptive instrumental case study design utilized data from online interviews and voluntarily submitted artifacts of nine middle school teacher leaders to investigate strategies used to support students experiencing trauma. Data were manually coded to determine themes indicating recommend strategies used to support students who have experienced trauma. The overall findings revealed that teacher leaders require professional development focusing on trauma-informed practices to suitably support students who are experiencing trauma. …

School Nursing Practice And Experiences During School Closures, Susie E. Birden Brown

Electronic Theses and Dissertations

This evidence-based quality improvement project was to evaluate public school nurses’ relationships and reaction to their new work environment during the closure of schools in Northern California resulting from the COVID-19 pandemic. This project addressed the change in school nursing, especially the nurses’ working environment. A stress management program was offered to the school nurses as an intervention to give them information on perceived stress. The stress management program included mindfulness and stress-relieving techniques over a 1-month period. The research methodology used in the project was a pre- and postintervention using the Perceived Stress Scale-10 (PSS) to measure if the …

The Relationship Of Hospital Ceo Gender And The Patient Experience: The Role Of The Mediating Effects Of Hospital Characteristics, Lanean M. Lang

Electronic Theses and Dissertations

In this quantitative study, I investigated CEO gender and the patient experience in acute care hospitals in Texas for 2019. As the patient-experience has been the metric for quality patient care and hospital reimbursements, hospital CEOs play an important role in promoting positive patient experience as they lead the organization in strategic goals. The study is relevant as a shortage of experienced and qualified healthcare leaders is expected as baby-boomers retire. The lack of women leaders remains a challenging issue. The purpose of the study was to assess the gender differences of the CEO on the impact of patient experience …

Genetic Liability To Cannabis Use Disorder And Covid-19 Hospitalization, Alexander S Hatoum, Claire L Morrison, Sarah M C Colbert, Evan A Winiger, Emma C Johnson, Arpana Agrawal, Ryan Bogdan

2020-Current year OA Pubs

BACKGROUND: Vulnerability to COVID-19 hospitalization has been linked to behavioral risk factors, including combustible psychoactive substance use (e.g., tobacco smoking). Paralleling the COVID-19 pandemic crisis have been increasingly permissive laws for recreational cannabis use. Cannabis use disorder (CUD) is a psychiatric disorder that is heritable and genetically correlated with respiratory disease, independent of tobacco smoking. We examined the genetic relationship between CUD and COVID-19 hospitalization.

METHODS: We estimated the genetic correlation between CUD (case:

RESULTS: Genetic vulnerability to COVID-19 was correlated with genetic liability to CUD (

CONCLUSIONS: Problematic cannabis use and vulnerability to serious COVID-19 complications share genetic underpinnings …

Solar-Powered Automated Transportation: Feasibility And Visualization, Burford J. Furman, Laxmi Ramasubramanian, Shannon Mcdonald, Ron Swenson, Jack Fogelquist, Yu Chiao, Alex Pape, Mario Cruz

Mineta Transportation Institute

A solar-powered automated transportation network (ATN) connecting the North and South campuses of San José State University with three passenger stations was designed, visualized, and analyzed in terms of its energy usage, carbon offset, and cost. The study’s methodology included the use of tools and software such as ArcGIS, SketchUp, Infraworks, Sketchup, Rhinoceros, and Autodesk 3DS Max. ATN vehicle energy usage was estimated using data from the university’s Park & Ride shuttle bus operation and by modeling with SUMOPy, the advanced simulation suite for the micro-traffic simulator SUMO. The energy study showed that an extensive solar photovoltaic (PV) canopy over …

Achieving Excellence For California’S Freight System: Developing Competitiveness And Performance Metrics; Incorporating Sustainability, Resilience, And Workforce Development, Jian-Yu Ke, Fynnwin Prager, Jose Martinez, Chris Cagle

Mineta Transportation Institute

This study explores the question of whether California's freight system is staying competitive with other US regions. A novel analytical framework compares supply chain performance metrics across multiple US states and regions for seaports, airports, highways, freight rail service, and distribution centers by combining the Performance Evaluation Matrix (PEM), Competitive Position Matrix (CPM), and Business Process Management (BPM) approaches. Analysis of industry data and responses from structured interviews with 30 freight industry experts across 5 transportation sectors suggests that California's freight system is competitive for seaports, airports, and freight rail; however, highways and distribution centers have room for improvement with …

Butte Priority Soils Operable Unit (Bpsou) Insufficiently Reclaimed Sites - Field Sampling And Investigation Plan (Fsp) Bres No. 104 - Colorado Dump – Final, Revision 1, Mike Mcanulty

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.