Digital Commons Network^™

A Multi-Tiered Mentoring Community Approach To Research Experiences For Local Students From Disadvantaged And Underrepresented Minority Backgrounds, Thomas Mckean, Lashall Bates, Gary Bates, Jacquelyn D. Wiersma-Mosley, S. Ranil Wickramasinghe

Chemical Engineering Faculty Publications and Presentations

Introduction: A research and mentoring program was developed to provide local first-generation students, students returning to school after a professional experience, and underrepresented minority students resources and relationships to guide them toward a STEM degree from a four-year university.

Methods: A multi-tiered mentoring community was formed including direct mentoring from graduate students and faculty advisors, peer mentoring among undergraduate students from different colleges and universities, and high school students to increase the accessibility of research opportunities for this demographic. Local students were recruited from Northwest Arkansas Community College and Upward Bound to combine community college and high school students in …

Recombinant Bile Salt Hydrolase Enhances The Inhibition Efficiency Of Taurodeoxycholic Acid Against Clostridium Perfringens Virulence, Tahrir Alenezi, Bilal Alrubaye, Ying Fu, Janashrit Shrestha, Samar Algehani, Hong Wang, Rohana Liyanage, Xiaolun Sun

Chemistry & Biochemistry Faculty Publications and Presentations

Clostridium perfringens is the main pathogen of chicken necrotic enteritis (NE) causing huge economic losses in the poultry industry. Although dietary secondary bile acid deoxycholic acid (DCA) reduced chicken NE, the accumulation of conjugated tauro-DCA (TDCA) raised concerns regarding DCA efficacy. In this study, we aimed to deconjugate TDCA by bile salt hydrolase (BSH) to increase DCA efficacy against the NE pathogen C. perfringens. Assays were conducted to evaluate the inhibition of C. perfringens growth, hydrogen sulfide (H₂S) production, and virulence gene expression by TDCA and DCA. BSH activity and sequence alignment were conducted to select the …

In Situ And 2d And 3d In Silico Redox Cycling Studies For Design Optimization Of Coplanar Arrays Of Microband Electrodes In A 70 Μm × 100 Μm Electroactive Footprint, Miguel Angel Abrego Tello, Mahsa Lotfi Marchoubeh, Ingrid Fritsch

Chemistry & Biochemistry Faculty Publications and Presentations

Optimization of redox-cycling currents was performed by adjusting the height (sidewalls, h), width (w), and length (l) of band electrodes and their spacing (w_gap) in coplanar arrays restricted to a small-electroactive window of 70 × 100 μm. These arrays can function in μL-volumes for chemical analysis (e.g., in-vivo dopamine detection using probes). Experiments were conducted with an array of five electrodes (NE = 5), w = 4.3 μm, w_gap = 3.7 μm, h = 0.150 μm, and l = 99.2 μm. Reasons for …

Modeling Charging Current Dynamics At Microelectrodes And Their Interfaces With Electrolyte And Insulators With A Focus On Microfabricated Gold Microband Electrodes On An Su-8 Substrate, Miguel Angel Abrego Tello, Mahsa Lotfi Marchoubeh, Ingrid Fritsch

Chemistry & Biochemistry Faculty Publications and Presentations

The suitability of electrochemical methods for quantitative measurements at microdevices is influenced by the relatively large electrode-insulator interface-to-electrode area ratio, greatly impacting charging dynamics due to interactions among electrolyte, conductor material, and insulator layers. The resulting charging current can overwhelm the faradaic current from redox chemistry. The device studied here features a 70 μm × 100 μm electroactive window, hosts gold coplanar microband electrodes, and is insulated by SU-8, which serves as both overlayer and substrate. The overlayer defines the electroactive length and isolates the leads of the electrodes from the sample solution. Cyclic voltammetry in 0.10 M …

Electrocoagulation As A Pretreatment For Reverse Osmosis For Potable Water From Brackish Groundwater, Mahmood Jebur, Yu-Hsuan Chiao, Hideto Matsuyama, S. Ranil Wickramasinghe

Chemical Engineering Faculty Publications and Presentations

Reverse osmosis (RO) is a widely utilized method for water treatment and desalination. Our study examined the application of an electrocoagulation (EC) and RO hybrid system for treating actual brackish groundwater (BGW), focusing on reducing RO scaling by EC pretreatment. A series of EC operating conditions were investigated, such as applied voltage, pH, EC reaction time, and type of electrode. The commercial software WAVE was utilized to analyze the water quality to assess the scaling potential of the EC pretreated feed stream for the San Antonio Water System (SAWS) BGW desalination plant. The SAWS BGW desalination process involves a three-stage …

Hydroponic Nutrient Solution Temperature Impacts Tulane Virus Persistence Over Time, Gayatri R. Dhulappanavar, Kristen E. Gibson

Food Science Faculty Publications and Presentations

Controlled environment agriculture (CEA), or indoor agriculture, encompasses non-traditional farming methods that occur inside climate-controlled structures (e.g., greenhouses, warehouses, high tunnels) allowing for year-round production of fresh produce such as leaf lettuce. However, recent outbreaks and recalls associated with hydroponically grown lettuce contaminated with human pathogens have raised concerns. Few studies exist on the food safety risks during hydroponic cultivation of leaf lettuce; thus, it is important to identify contributing risk factors and potential mitigation strategies to prevent foodborne transmission via hydroponically grown produce. In this study, the concentration of infectious Tulane virus (TV), a human norovirus surrogate, in hydroponic …

A Comparisons Of The Covariate Types In Applications Of Semtree Model To Educational Studies, Minju Hong, Juyeon Lee

Counseling, Leadership, and Research Methods Faculty Publications and Presentations

In this study, we investigated the applicability of the SEMtree model to analyze the longitudinal data analysis in educational studies. SEMtree is one of the advanced approaches to incorporate the advantages of structural equation modeling and decision tree models under confirmatory and exploratory data analysis frameworks. The main purpose of this study is to figure out how the researcher deals with the data conditions of covariates when using the SEMtree model. By analyzing KCYPS 2018 the 4th-grade elementary school students' panel, we found that there were differences of the duplicated selected covariates when splitting the nodes in the SEMtree model …

Privacy’S Commodification And The Limits Of Antitrust, Jeffrey L. Vagle

Arkansas Law Review

This Article argues that the buying and selling of personal data forms what Debra Satz calls a “noxious market,” and, thus, any regulation of information privacy should not accept or depend upon its commodification but should stand on its own. This Article proceeds in three parts. Part I first lays out the history and effects of data commodification, arguing that the market created by this commodification is noxious and undesirable. Part II examines the renewal of antitrust’s purpose as a regulatory tool, especially in the context of its use in the regulation of large technology firms. Finally, Part III argues …

Pre-Incisional And Multiple Intradermal Injection Of N-Acetylcysteine Slightly Improves Incisional Wound Healing In An Animal Model, Wictor Pascal, Antoni Smolinski, Mateuz Gotowiec, Marta Wojtkiewicz, Albert Stachura, Kaspar Pelka, Michal Kopka, Kyle P. Quinn, Alan E. Woessner, Dariusz Grzelecki, Pavel Wlodarski

Biomedical Engineering Faculty Publications and Presentations

The objective of this study was to investigate if delivering multiple doses of N-acetylcysteine (NAC) post-surgery in addition to pre-incisional administration significantly impacts the wound healing process in a rat model. Full-thickness skin incisions were carried out on the dorsum of 24 Sprague-Dawley rats in six locations. Fifteen minutes prior to the incision, half of the sites were treated with a control solution, with the wounds on the contralateral side treated with solutions containing 0.015%, 0.03% and 0.045% of NAC. In the case of the NAC treated group, further injections were given every 8 h for three days. On days …

International Rice Outlook: International Rice Baseline Projections 2023-2033, A. Durand-Morat, W. Mulimbi

AAES Research Reports and Research Bulletins

No abstract provided.

A Comprehensive Investigation Of The Influence Of Geometric Structure On The Shape Memory Performance Of Nafion, Jade Thomas

Physics Undergraduate Honors Theses

While perfluorosulfonic acid (PFSA) membranes have primarily been used in fuel cells due to their chemical, thermal, and mechanical stability, one PFSA, Nafion, boasts two unique characteristics: a broad glass transition (~55 °C to 130 °C) and a temperature-persistent electrostatic network. The combination of these two characteristics endows Nafion with exceptional shape memory properties – the ability of a material to morph and transform into pre-programmed shapes when exposed to an external stimulus – with enhanced permanent shape memorization, and a potentially near-infinite number of temporary shape memorization. This study focused on expanding the base of knowledge surrounding Nafion’s shape …

An Exploration Of Procedural Methods In Game Level Design, Hector Salinas

Computer Science and Computer Engineering Undergraduate Honors Theses

Video games offer players immersive experiences within intricately crafted worlds, and the integration of procedural methods in game level designs extends this potential by introducing dynamic, algorithmically generated content that could stand on par with handcrafted environments. This research highlights the potential to provide players with engaging experiences through procedural level generation, while potentially reducing development time for game developers.

Through a focused exploration on two-dimensional cave generation techniques, this paper aims to provide efficient solutions tailored to this specific environment. This exploration encompasses several procedural generation methods, including Midpoint Displacement, Random Walk, Cellular Automata, Perlin Worms, and Binary Space …

Examining How Agricultural Education Programs Place Student Teaching Interns In School Based Programs, Mckenna Sairls

Agricultural Education, Communications and Technology Undergraduate Honors Theses

This study investigates the criteria and procedures involved in placing student teaching interns within school-based agricultural education (SBAE) programs across land-grant universities within the United States, employing a Modified Delphi survey design. By examining factors that influence placement decisions, this research aims to address a gap in literature as few comprehensive studies on internship placement processes in agricultural education exist. The findings highlight the significance of factors such as program quality, mentorship abilities, and preservice teacher traits in the placement process.

Sequential Optimization For Stressor-Informed Test Planning Through Integration Of Experimental And Simulated Data, Jacob Brecheisen

Data Science Undergraduate Honors Theses

This technical report details an innovative approach in reliability engineering aimed at maximizing system durability through a synergistic use of physical experimentation and computer-based modeling. Our methodology explores the efficient design and analysis of computer experiments and physical tests to facilitate accelerated reliability growth, while leveraging a sequential integration of data from these two distinct sources: costly physical experiments, characterized by random errors, and inexpensive computer simulations, marked by inherent systematic errors. The key innovation lies in the adoption of a closed-loop design and analysis method. This method begins by identifying a viable subset of important environmental stressors—such as temperature, …

Improvement Of Patient Outcomes Through The Use Of Intensivist Nurse Practitioners, Leigha Fish

The Eleanor Mann School of Nursing DNP Capstone Projects

This mixed retrospective and prospective cohort study aimed to compare mortality outcomes and associated factors between two cohorts of patients diagnosed with respiratory failure: on-call physicians and Interventional Nurse Practitioners (INPs). The analysis involved 143 patients, 82 in the on-call physician cohort and 61 in the INP cohort. Contrary to initial expectations, the two cohorts had no significant difference in mortality rates (p = 0.143). However, significant differences were observed in critical variables affecting mortality, including Time from Admit to Procedure Performance (p = 0.029), ICU Length of Stay (p = 0.013), and Ventilator Days (p = 0.048), with INP-managed …

A Search For Pulsars And An Exploration Of Dispersion Measure Within The Milky Way Galaxy, Emily Ware

Physics Undergraduate Honors Theses

A pulsar is a rapidly rotating neutron star which emits electromagnetic radiation from its magnetic poles. Upon detection from Earth, these signals have been dispersed in phase due to electron interactions in transit. The extent of this dispersion indicates information about both the distance to and the location of the pulsar, with respect to Earth and the Galactic plane. This project makes use of radio data from the 100m Robert C. Byrd Green Bank Telescope (GBT), presented in the form of prepfold plots assembled by the Pulsar Science Collaboratory (PSC). 1,007 of these plots were analyzed in order to determine …

The Analysis Of Mechanical Exfoliation Of Graphene For Various Fabrication And Automation Techniques, Lance Yarbrough

Physics Undergraduate Honors Theses

Mechanical Exfoliation

Green At Eye Level: From Measurement Approaches To Simulated Models And Inequality Assessments In U.S. Major Cities, Jingjing Yan

Graduate Theses and Dissertations

This dissertation delves into the multifaceted dynamics of urban greenness, addressing critical aspects of sustainable urban development. Providing urban green spaces has been widely acknowledged to offer numerous benefits to individuals and communities. Recently, there has been a growing recognition of the importance of evaluating urban greenness from a human-centered perspective, partly due to the rapid development of eye-level greenness measurement. First, to provide a comprehensive overview of measurement approaches and topics related to eye-level urban greenness, a systematic review of 77 papers was conducted in this research. This review revealed that street view images are the primarily utilized data …

Passages, Arden Carlson

Graduate Theses and Dissertations

Passages is a collection of wood sculptures and drawings by Arden Carlson, exploring a mesh of southern intimacies and queer musings; underpinned by the logics of belief, grief, and love. The result is a tender field of angelic birds fixed in flight over gnawed surfaces of grain and graphite. The following dissertation details the artist’s logic during the construction of the visual art thesis exhibition, Passages. The writing is composed in an autoethnographic format, backed by supporting anecdotes and creative methodologies that help to route the operational modes used. Near the end of this writing, you’ll find an additional addendum …

Addressing Data Limitations Of Commercial Waterways Via Machine Learning And Stochastic Optimization, Sanjeev Bhurtyal

Graduate Theses and Dissertations

Freight transportation is a crucial component of the US economy, with truck, rail, and water contributing significantly to the Gross Domestic Product (GDP). However, challenges arise in maintaining infrastructure capacity to accommodate the growing tonnage and value of freight transportation. Waterways offer high efficiency and environmental friendliness, with the capacity to transport substantial cargo volumes. Utilizing waterways can alleviate bottlenecks in landside transportation, accommodating the rising tonnage of commodity flow in the US. Despite the advantages of waterway transportation, the data limitations hinder informed decision-making regarding port operation and infrastructure investment. The lack of granularity and timeliness in available data …

The Ai Effect: Rethinking Design Workflows For Enhanced Productivity And Creativity, Israel Adeleye

Graduate Theses and Dissertations

Advancements in artificial intelligence and machine learning are transforming how designers work with computers. This thesis explores the developing relationship between artificial intelligence (AI) and design processes, focusing on how it impacts the creation of digital experiences. This study examines the impact of AI on design, highlighting how AI can improve efficiency and creativity alongside ethical challenges and the need to preserve human uniqueness in digital creations. It investigates AI's effects on design workflows, creativity, and the designer's evolving role through interviews, content analysis, case studies, and surveys. The aim is to understand AI's influence on designer productivity, innovation, and …

On Distortion Of Surface Groups In Right-Angled Artin Groups, Lucas Bridges

Mathematical Sciences Undergraduate Honors Theses

Surfaces have long been a topic of interest for scholars inside and outside of mathe- matics. In a topological sense, surfaces are spaces which appear flat on a local scale. Surfaces in this sense have a restricted set of properties, including the behavior of loops around a surface, codified in the fundamental group.

All but 3 surface groups have been shown to embed into a class of groups called right-angled Artin groups. The method through which these embeddings are created places large restrictions on all homomorphisms from surface groups to right-angled Artin groups.

One such restriction on these homomorphisms is …

Open-Source Optimization For Green Last Mile Delivery And Other Applications, John Sooter

Industrial Engineering Undergraduate Honors Theses

Solving combinatorial optimization problems at scale and of sufficiently interesting context has historically required commercial solvers and access to proprietary company data. The development of performant open-source mathematical programming software and crowdsourced datasets has created an opportunity for individuals and enterprises alike to consider alternative solutions to problems with social and personal implications. This honors thesis represents a summary of my undergraduate research work, an application of optimization to three distinct problems connected to these developments. First, we present an optimization study of a last mile delivery system that shows optimization for energy consumption can generate vehicleindependent fuel savings at …

Investigating The Integration Of Demand Distribution Modeling In Supply Chain Simulation, Marshal Ray

Industrial Engineering Undergraduate Honors Theses

This research presents a methodology for modeling the amount of demand and the time intervals between demands within a complex supply chain simulation program. The research outlines the approach, incorporating factor analysis and consolidation techniques, with a focus on using Random Forest modeling for factor importance identification. The results section covers demand quantity modeling utilizing both continuous and discrete empirical approaches, accompanied by considerations for outlier and overall distributions. While using these modeling techniques, P-P plots and KS-Statistics were employed to assess the goodness of fit, as a way to make recommendations for these models. The time between demand modeling …

A Comprehensive Investigation Of The Influence Of Geometric Structure On The Shape Memory Performance Of Nafion, Jade Thomas

Mechanical Engineering Undergraduate Honors Theses

While perfluorosulfonic acid (PFSA) membranes have primarily been used in fuel cells due to their chemical, thermal, and mechanical stability, one PFSA, Nafion, boasts two unique characteristics: a broad glass transition (~55 °C to 130 °C) and a temperature-persistent electrostatic network. The combination of these two characteristics endows Nafion with exceptional shape memory properties – the ability of a material to morph and transform into pre-programmed shapes when exposed to an external stimulus – with enhanced permanent shape memorization, and a potentially near-infinite number of temporary shape memorization. This study focused on expanding the base of knowledge surrounding Nafion’s shape …

Geometric Principles In Architecture Aesthetics, Vincent Gemmiti

Architecture Undergraduate Honors Theses

This study focuses on geometric formalism in three major monuments across different architectural eras in time. The use of three distinct geometric principles to outline the use of pure or manufactured shapes and figures helps to discover and isolate an aesthetic component of architecture within which it is contained. A collection of studies are implemented and are focused on orthographic drawings from each monument in horizontality and verticality, consisting of a dual set of overlay and interpretative drawings for each type of orthographic representation for each monument. A discussion follows and highlights the changes or similarities over time the role …

Dreams And Livelihoods In Rural Areas Require Capital, Too: An Investigation Into The Role Of Diminishing Community Banks, Financial Education, And Access To Capital In Rural Areas, Jackson Walton

Finance Undergraduate Honors Theses

Individuals in rural communities face unprecedented economic challenges due to a lack of financial education and a decline in the prevalence of community banks. These problems have continuously grown exponentially without successful attempt at remedy. The community banks that once served as the center of economic activity and prevalence in rural communities are leaving these communities quickly- leaving many without access to lines of credit, personal relationship banking, and without necessary financial education in a world with more financial options than ever. Access to banking and higher financial literacy proficiency rates are almost directly linked to better financial outcomes like …

Financial Consulting Internship In Valencia: Alternative Investments And Ai, Mason Sidney Rike

Finance Undergraduate Honors Theses

During the summer before my senior year, I had the opportunity to work as a research analyst in the finance department of TuaTeam, a financial and strategic consulting firm in Valencia, Spain. TuaTeam is a relatively new firm that serves its clients in a wide range of areas, from strategic restructuring and business model development to finding funding for future projects and identifying/evaluating potential investment opportunities. TuaTeam also works closely with communities around Spain to foster innovation and development among youth and professionals seeking to gain experience in new trends in technology and cultural enrichment. The company currently holds classes …

Innovation Unveiled: The Power Of Innovative Experiences On Undergraduate Development, Alexander Cummings

Finance Undergraduate Honors Theses

A paper analyzing my experiences participating in the McMillon Innovation Studio and other OEI programs and their impact on my development during my undergraduate education.
It explores how these experiences can positively affect students of all backgrounds and how universities can work to improve these programs to further amplify their effects.

The Economics Behind The Legalization Of Sports Gambling And Financial Market Relations, John Bassham

Finance Undergraduate Honors Theses

With the recent legalization of sports gambling, it has become a popular spectacle among sports fans and financial analysts pursuing an understanding of it. This thesis dives into the meticulous relationship between sports gambling and economic factors/financial market relations using academic literature to understand the relationship.

The thesis explores sports gambling from an economic standpoint using incentives to understand the market participants and economic advantages and disadvantages. It also uses academic literature and analytics to make a case for market efficiency while also delving into particular inefficiencies.

Furthermore, this thesis uses characteristics of the stock market in comparison of the …