Digital Commons Network^™

Portal, M'Shinda Abdullah Broaddus

Graduate Theses and Dissertations

Portal is a series of large-scale multimedia collages that work to show the intersections between three very different and Tim-specific imagery. The imagery utilized, and the intersections highlighted aim to acknowledge a deep cultural history of how black men have been stripped of their personhood in visual media, and how that history has negatively impacted/impacts the way that black men are able to exist in reality.

Modeling And Control Strategies For A Two-Wheel Balancing Mobile Robot, John Alan Moritz

Graduate Theses and Dissertations

The problem of balancing and autonomously navigating a two-wheel mobile robot is an increasingly active area of research, due to its potential applications in last-mile delivery, pedestrian transportation, warehouse automation, parts supply, agriculture, surveillance, and monitoring. This thesis investigates the design and control of a two-wheel balancing mobile robot using three different control strategies: Proportional Integral Derivative (PID) controllers, Sliding Mode Control, and Deep Q-Learning methodology. The mobile robot is modeled using a dynamic and kinematic model, and its motion is simulated in a custom MATLAB/Simulink environment. The first part of the thesis focuses on developing a dynamic and kinematic …

Failure To Appear, Trent Harlan Bozeman

Graduate Theses and Dissertations

Failure To Appear is a series of photographs and collaged works that explores my layered connections between memory, unknown legacies, and knowledge of self. This body of work is not tied to any location or specific event. It is attributed to my returning to the South, returning to the institution, returning to my childhood residence and the perceived agnosia that occurred while working on a long-term project based in the Arkansas Delta.

Bond-Breaker Properties Of Different Media For Concrete Pavement Design, Andres Calzacorta

Graduate Theses and Dissertations

Currently Arkansas requires a layer of asphalt as the main bond-breaker over cement treated base for rigid pavement design. The study presented in this paper aims to replicate the results from previous research which demonstrated the bond-breaker properties of concrete curing compounds and geotextiles. Bond-breakers are materials applied to the surface of stabilized bases to reduce the interaction between the base and a pavement cement concrete layer. The excessive interaction between these two layers can lead to cracking in the overlay and reduction of the serviceability life of concrete. The curing compound was applied in a single application (SA, 200 …

Pda/Ptfe Solid Lubricant Coating For 60niti Applications, Charles Richey Miller

Graduate Theses and Dissertations

The intermetallic alloy 60NiTi has a unique combination of high hardness and low elastic modulus, which makes it highly resistant to dents. Additionally, 60NiTi is extremely corrosion resistant and chemically inert. These properties make 60NiTi a desirable material for challenging mechanical component applications with high contact stresses and in harsh environments. However, lubrication issues have hindered the use of 60NiTi because it has poor tribological performance if it is not properly lubricated. The mechanical properties of hardened 60NiTi and its microconstituents were studied by nanoindentation. This study showed that the bulk properties of 60NiTi are driven by the properties of …

Evaluation Of Rice Stink Bug, Oebalus Pugnax (F.), Resistance To Lambda-Cyhalothrin And The Economic Impact On Rice Grain Quality For Multiple Foliar Insecticides, Trevor Bradley Newkirk

Graduate Theses and Dissertations

Rice stink bug, (RSB), Oebalus pugnax (F.), (Fabricius 1775) is the major pest of headed rice, Oryza sativa L. in the southern rice producing states. The evaluation of current insecticides is imperative to efficient and economical RSB management for rice growers. Multiple reports of field failures with lambda-cyhalothrin have been documented since 2019. Lambda-cyhalothrin has been the standard for RSB control for the past two decades. The objective for this research was to determine if RSB is becoming resistant to lambda-cyhalothrin in Arkansas, and the most economical insecticide choice for growers with respect to RSB control and grain quality. RSB …

Evaluation Of Thresholds, Control, And Behavioral Responses Of Tobacco Thrips, Frankliniella Fusca (Hitch), And Tarnished Plant Bugs, Lygus Lineolaris (Beauvoris), In Thryvon Cotton, Adam Young Whitfield

Graduate Theses and Dissertations

Tobacco thrips are an important pest in Mid-South cotton production. Thrips are a pest of seedling cotton, feeding on the leaf tissue of plants which can result in stunted growth, delayed fruiting, loss of apical dominance, and possible stand loss. Field studies were conducted in 2021 and 2022 to evaluate Thryvon, a new transgenic trait in cotton that produces the Bt toxin Cry51Aa, for control of tobacco thrips. Thryvon cotton was tested at three locations in Arkansas: Marianna, Tillar, and Keiser. These studies evaluated thrips control on ThryvOn vs non-ThryvOn cotton and the effect of insecticide seed treatments on ThryvOn …

Geophysical Assessment Of Internal Erosion Damage At The Crawford County Levee, Samuel Ross Hokett

Graduate Theses and Dissertations

Levee failures during flooding events can result in catastrophic loss of life and property. Soil erosion during high water events is a primary cause of levee failures. Accordingly, this research focuses on the geophysical assessment of internal erosion damage in levees. This thesis presents a case study utilizing Capacitively Coupled Resistivity (CCR), Direct Current Electrical Resistivity Tomography (DC ERT), and Multichannel Analysis of Surface Waves (MASW) to assess internal erosion damage at the Crawford County Levee System in Van Buren, AR, that occurred during the 2019 Arkansas River flood. Geophysical surveys acquired included longitudinal CCR, DC ERT, and MASW lines …

Evaluation Of Bt Cotton Cultivar Efficacy And Economic Impact On Cotton Yield With And Without A Foliar Insecticide Application, Zackary Murray

Graduate Theses and Dissertations

Helicoverpa zea is the second most damaging insect pest of cotton in Arkansas. It is becoming more difficult to control in the United States due to recently documented resistant to dual gene cultivars. The objective of this thesis was to develop a better understanding of the efficacy of several Bt cotton technologies and foliar insecticides used to manage H. zea. Experiments examined damage in current commercial non-Bt, dual gene, and three gene cotton cultivars. Other experiments evaluated if H. zea could detect concentrations of chlorantraniliprole and residual of chlorantraniliprole in cotton for an extended period after application. These studies suggest …

World Class Supply Chain 2023: Dynamic Challenges, Collaborative Solutions, Michael Haughton

Business Faculty Publications

The Seventh Annual World Class Supply Chain Summit was convened on May 3rd, 2023 under the theme of Dynamic challenges, collaborative solutions. Being derived from opinions that attendees expressed in the previous year’s post-summit survey, the theme signified the supply chain community’s strong interest in how organizations and individuals can collaborate with each other to address today’s most pressing challenges. The design of the summit’s deliberations on the theme comprised two keynote addresses (one each from the perspectives of industry and academia), an industry panel, a student forum presentation, and an intergenerational fireside chat by a panel comprising individuals …

Editor's Note, Will Anderson

The Prairie Light Review

No abstract provided.

Market (Man), Natalia Toreeva

The Prairie Light Review

No abstract provided.

Prehistoric Mythology, Tania Blanco

The Prairie Light Review

No abstract provided.

Pink Roses, Karlynn Rich

The Prairie Light Review

No abstract provided.

Fall In Love With An Over-Thinker, Fisayomi Oloyede

The Prairie Light Review

No abstract provided.

My Mother's Hands, Tom Montgomery Fate

The Prairie Light Review

No abstract provided.

Off The Coast Of Eden, Elena Byrd

The Prairie Light Review

No abstract provided.

Etre Le Coup De Foudre, Bee Bishop

The Prairie Light Review

No abstract provided.

The Dawn Of Light, Chris Hurley

The Prairie Light Review

No abstract provided.

Because I Don't Know How To Say, Jessica Shubert

The Prairie Light Review

No abstract provided.

Sudden Stop, Janine Orihuela Solis

The Prairie Light Review

No abstract provided.

Both Sides, Damien Mendez

The Prairie Light Review

No abstract provided.

Back Cover - The Color Of The Garden, Adam Sana

The Prairie Light Review

No abstract provided.

Research On Rubik's Snake And Quasi-Surfaces, Yu Chen

Doctoral Dissertations

In this dissertation, we have two topics in applied math. For the first one, we studied the Rubik’s snake by mathematical methods.

The Rubik’s snake is a toy invented by Professor Erno Rubik in 1981. It consists of right isosceles triangular prisms. Since the shape of a snake depends only on how we twist it, we can get a unique sequence from every snake. Those sequences record the way we twist snakes. In this dissertation, we will study the relations between some structures of the snake and the sequences.

For a snake with a specific structure, we will find out …

French Nasal Vowels In The Mezzo-Soprano Voice, Jada G. Duff

Recital Papers

This paper focuses on the four French nasal vowels in the mezzo-soprano voice. It clearly states how to pronounce the vowel with and without nasality. The paper displays spectrogram images to compare the resonance between the non-nasal and nasal vowels in different registers. It addresses the need for modification of the vowels in different registers of the mezzo-soprano voice. The paper also describes how to apply the results of the information from the spectrogram images to French pieces. The repertoire includes works by Jules Massenet, Claude Debussy, Maurice Ravel, Isaac Albéniz, Francis Poulenc, and Erik Satie.

Mechanisms Of Formation Of Novel Guanine-Guanine Cross-Links As Major End Products During One-Electron Oxidation Of Guanine Derivatives, Evan Dunn

Undergraduate Honors Theses

Guanine (G), as the most oxidizable base in DNA, is the major focus of studies of oxidation damage to DNA. The present thesis reports the first detailed characterization of G dimerization products potentially resulting from recombination of neutral G• radicals. Previous research has discovered a novel type of products of G• dimerization, D1 and D2, formed from one-electron oxidation of G derivatives. However, the mechanism of this dimerization remains elusive. While there appears to be a tautomeric equilibrium between two forms of G•, G(N₁-H)• or G(N₂-H)•, it remains unclear which intermediate participates in the formation of …

Patterns And Sources Of Variation In Heterospecific Pollen Deposition In Flowers Of The Native Blue Cardinal Flower (Lobelia Siphilitica), Allie Drinnon

Undergraduate Honors Theses

Plants species interactions via pollinators are a model system to understand the mechanisms that generate plant diversity in nature. However, most studies have focused on plant-plant interactions via pollinator attraction while ignoring the role of plant-plant interactions via pollen transfer. Heterospecific pollen transfer (henceforth HP) can be common and have negative fitness effects. Negative HP fitness effects may prompt the evolution of adaptive strategies to minimize them. However, the extent of spatial variation in HP load size within and among populations, a tenet for natural selection, remains unexplored. Such knowledge would hence constitute a first step in advancing our understanding …

Gender & Sexuality Services Newsletter, May 2023, University Of Northern Iowa. Gender & Sexuality Services.

Gender & Sexuality Services Newsletter

In This Issue:

--- MBLGTACC
--- De-Stress Days
--- Weekly Programs
--- Summer Support
--- Upcoming Events

Contingency And Contestation In Christianity And Liberalism, Michael P. Moreland

Notre Dame Law Review

What is the relationship of Christianity to liberalism? Answers include: Liberalism is a product of the moral legacy of Christianity, such as the dignity of individual human persons, equality, rights, perhaps even some forms of democratic institutionalism. Or liberalism is a hostile reaction against Christianity by way of an autonomous individualism set against divinely ordained creatureliness and dependence, democracy against authority, egalitarianism against hierarchy. Or liberalism is in a modus vivendi relationship with Christianity and vice versa. Or perhaps there is something true about each of these answers.

Critiques of liberalism in law and politics come in waves. The liberal-communitarian …

A Third Category For Rideshare Drivers: Untying Employment Statutes From Agency Law, Nathaniel Reyes

Notre Dame Law Review

This Note does not take a stance on the issue of whether rideshare drivers should be classified as “employees” under either employment statutes or the doctrine of respondeat superior. It argues, rather, that if the protection of employment statutes is to be extended to rideshare drivers, this should be done by Congress’s creation of new worker categories in the statutes, rather than by squeezing rideshare drivers into the existing “employee” category. The use of the same binary distinction between employee and independent contractor in both employment statutes and respondeat-superior cases is a practice which should ultimately be abandoned, and recognizing …