Digital Commons Network^™

Hydration, Shrinkage, Cracking, And Mechanical Properties Of Cementitious Materials With Lignocellulosic Biomass Wastes., Aofei Guo

Electronic Theses and Dissertations

The disposal of lignocellulosic biomass wastes imposes a huge economic and environmental burden on this society. Recycling lignocellulosic biomass wastes and applying them to cementitious materials provides a sustainable and value-added way for both agriculture and concrete industries. To comprehensively identify the effect of lignocellulosic biomass wastes at different scales on cementitious materials, the hydration, shrinkage, cracking, and mechanical properties of cementitious materials with lignocellulosic biomass wastes were studied. Given the three different forms (powders, chips, and fibers) of lignocellulosic biomass wastes in this study, the research was implemented in three stages. In the first stage, hemp powders were collected …

Plasma Resuscitation Attenuates Intestinal Barrier Disturbance Following Hemorrhagic Shock., Jessica E. Schucht

Electronic Theses and Dissertations

Background: Intestinal ischemia-reperfusion injury (IIRI) following resuscitated hemorrhagic shock (HS/RES) leads to endothelial damage, microcirculatory dysfunction and intestinal barrier breakdown, increasing intestinal permeability. This pathologic process contributes pathophysiology of multiple organ dysfunction syndrome (MODS) in some trauma patients. Although vascular smooth muscle machinery remains intact, microvascular vasoconstriction occurs secondary to endothelial cell damage, resulting in further ischemia and organ injury. Used separately, resuscitation with Fresh Frozen Plasma (FFP) or Direct Peritoneal Resuscitation (DPR) improves the intestinal microcirculation and alleviates organ injury. Further examination of these effects individually or combined could aid in the resuscitation of hemorrhagic shock. Methods: Sprague Dawley …

Investigating The Disorder And Compaction Of Designed Minielastin Using Nuclear Magnetic Resonance., Ma Faye Charmagne Aquino Carvajal

Electronic Theses and Dissertations

Minielastins are elastin-based proteins with alternating hydrophobic and cross-link modules similar to tropoelastin. Tropoelastin is the ~70 kDa soluble monomeric precursor of elastin. The extracellular matrix protein, elastin provides elasticity to tissues and organs such as lungs, arteries and ligaments. The elastic properties of natural elastin are believed to be entropic in origin. In vivo, the elastin matrix is approximately 50% water by weight. Without water, elastin is brittle and hard. Minielastins, like tropoelastin, undergo a liquid-liquid phase transition upon an increase in temperature. Factors such as hydrophobicity, chain length and concentration affect the coacervation temperature, T_c. The …

Undergraduate Students Use Moral Reasoning And Belief In Genetic Determinism In Response To A Crispr/Cas9 Socioscientific Issue., Katie M. Seiter

Electronic Theses and Dissertations

This dissertation explores how students reason about genetic engineering socioscientific issues (SSIs) related to a recently developed, powerful genome editing technology called CRISPR/Cas9. It is divided into three chapters. Chapter One describes an exploratory study that characterized students’ moral reasoning using a sociocultural theoretical framework. I used content analysis and logistic regression to investigate how academic and social factors influenced moral reasoning. Students generally opposed the use of CRISPR/Cas9 technology for non-medical enhancements, and the moral considerations used were influenced by genetics knowledge level and demographic variables such as gender and socio-economic status. Further investigation of moral perspectives for students …

Impacts Of Environmental And Hydrologic Factors On Urban Stream Water Quality., Jason Patrik Ingram

Electronic Theses and Dissertations

Urban streams can be impacted by a multitude of hydrologic and environmental factors, making maintaining these water sources difficult. Urbanization can exacerbate these impacts creating new challenges in preserving suitable urban stream water quality. Urbanization is the development of city landscape and suburban living within an otherwise natural region. For this environmental impact study, the effects of city development on urban stream water quality was monitored for Mill Creek in Louisville, Kentucky. To study the effects of urbanization on Mill Creek, this project was completed utilizing the BACI method for comparing impacts. The results of the water quality monitoring were …

Computational Behavioral Analytics: Estimating Psychological Traits In Foreign Languages., Kristopher Wayne Reese

Electronic Theses and Dissertations

The rise of technology proliferating into the workplace has increased the threat of loss of intellectual property, classified, and proprietary information for companies, governments, and academics. This can cause economic damage to the creators of new IP, companies, and whole economies. This technology proliferation has also assisted terror groups and lone wolf actors in pushing their message to a larger audience or finding similar tribal groups that share common, sometimes flawed, beliefs across various social media platforms. These types of challenges have created numerous studies in psycholinguistics, as well as commercial tools, that look to assist in identifying potential threats …

Automatic Target Recognition With Convolutional Neural Networks., Nada Baili

Electronic Theses and Dissertations

Automatic Target Recognition (ATR) characterizes the ability for an algorithm or device to identify targets or other objects based on data obtained from sensors, being commonly thermal. ATR is an important technology for both civilian and military computer vision applications. However, the current level of performance that is available is largely deficient compared to the requirements. This is mainly due to the difficulty of acquiring targets in realistic environments, and also to limitations of the distribution of classified data to the academic community for research purposes. This thesis proposes to solve the ATR task using Convolutional Neural Networks (CNN). We …

Samuel Daniel’S Lyric Reception: The Role Of Poet-Critics From Wordsworth To Winters, Caleb Mcghee

Electronic Theses and Dissertations

The Elizabethan poet Samuel Daniel was popular in his day, producing lyric, dramatic, and narrative poems. Contemporary anthologies, however, memorialize him primarily as a lyric poet, one that usually gets few entries. My thesis shows how Daniel had a minor reputation as a lyric poet by the 1960’s, despite having high-profile admirers. These well-known poet-critics who engaged with his work are essential to analyzing his lyric reputation: owing to the Romantic emphasis on the lyric, I begin with William Wordsworth and Samuel Taylor Coleridge’s reception of his lyrics in the 19th century. I then analyze the turn of the century …

Chronic Effects Of Methylphenidate On Neuronal Viability And Plasticity, Hannah Oakes

Electronic Theses and Dissertations

Methylphenidate (MPH) is the most commonly prescribed drug to treat Attention Deficit Hyperactivity Disorder (ADHD). ADHD is now considered a life-long disorder; therefore, patients take MPH from adolescence into adulthood, highlighting the need for research studying chronic MPH use. MPH increases dopamine and norepinephrine within the synaptic cleft; therefore, chronic use of MPH may lead to changes within important dopaminergic pathways. One pathway, the mesolimbic pathway, includes the hippocampus, an area where adult neurogenesis occurs. We investigated the effects of chronic low and high doses of MPH on neurogenesis and examined levels of a few key proteins linked to cell …

Predator-Avoidance Of Larval Black-Bellied Salamanders (Desmognathus Quadramaculatus) In Response To Cues From Native And Nonnative Salmonids, Brian L. Dempsey

Electronic Theses and Dissertations

The introduction of nonnative salmonids into Southern Appalachia may pose a threat to resident salamander populations. In recent years, the stocking and encroachment of rainbow trout (Oncorhynchus mykiss) into headwaters where the black-bellied salamander (Desmognathus quadramaculatus) and brook trout (Salvelinus fontinalis) naturally coexist has raised concerns. In aquatic prey, predator-avoidance responses are primarily influenced through the detection of chemical cues released from predators. The objective of this study was to determine how co-occurrence with a predator influences black-bellied salamander predator recognition behavior. To evaluate this, salamander activity metrics (general activity, number of movements, and latency to move) were recorded before …

Environmental Cybernetics: Technology And The Perception Of Remediated Space, Lucas Gentry

Electronic Theses and Dissertations

Moby Dick, House of Leaves, and Ex Machina portray characters that rely on a form of technology to navigate their respective environments. As such, their settings are remediated spaces – spaces understood through their relationship with technology. The inhabitants of remediated spaces inherently resemble the cyborg as their perspectives fuse with machines in their understanding of space. Captain Ahab from Moby Dick must rely on his ivory leg and ship for mobility, often merging himself with the machine of the vessel. House of Leaves provides a space and family that exist exclusively within the confines of found footage, …

Past, Current, And Future Potential Distributions Of Red Spruce And Fraser Fir Forests In The Southern Appalachians: Interpreting Possible Impacts Of Climate Change, Danika Mosher

Electronic Theses and Dissertations

Spruce-Fir forests are relicts from the Pleistocene and can only be found within the Southern Appalachians. Analyzing the relationships between species distribution, climatic parameters, topography, and biotic interactions through ecological niche modeling creates prediction maps for conservation efforts. Maxent, Boosted Regression, and Random Forest were utilized to compare which model and variable combinations best approximate the unique mountain forest environment. Maxent with a bias file produced optimal results and was used to examine distributional changes that may occur in the future and how these changes compare to paleo-environmental distributions. Fraser fir has shown evidence of being influenced by changing climates …

Policing Farm Crime: An Exploratory Study Of Agricultural Crime Units, Brianna Lynn

Electronic Theses and Dissertations

The purpose of this study was to explore the practices, perceptions, and operations of agricultural crime units. To date, there has been little research conducted on policing agricultural crimes and no known research on units specializing in investigating them. The study utilizes data gathered from qualitative interviews with agricultural crime investigators across several states to fill this gap in the literature. The results allow for an examination of the fundamental practices of agricultural units, their perceptions and their experiences. In addition, they point to several implications for both policy and practice that may serve to guide our efforts to combat …

“Fetch M’Dear”: Healers, Midwives, Witches, And Conjuring Women In Select Ya And Toni Morrison Novels, Diane Mallett-Birkitt

Electronic Theses and Dissertations

Accusations and persecution of witchcraft have been embedded in global culture for centuries. For as long as these persecutions have occurred, women have found themselves accused most frequently. Older women with herbal knowledge were often called on to assist with childbirth or termination of pregnancies and this “secret knowledge” often led them to be suspected of supernatural abilities, often of a satanic nature. Intrigued by these wise women who appeared to have mysterious powers and a penchant for arousing the ire of men in the legal, medical, and religious communities, I began to notice their frequent appearance in novels. Does …

Prevention Of Chronic Inflammation By Targeting Macrophage Integrin Adb2, Cady Forgey

Electronic Theses and Dissertations

Macrophage integrin a_Db₂ promotes macrophage retention and accumulation within inflamed tissue, a key event in development of chronic inflammation. Recently, the P5 peptide was identified as a specific inhibitor for integrin a_Db₂ interaction with 2-(ω-carboxyethyl) pyrole (CEP), a ligand at inflammatory sites. This thesis aims to identify integrin a_D I-domain amino acids involved in binding P5 peptide and likewise to CEP. We propose that non-conserved, basic amino acids of the integrin a_Db₂ I-domain are responsible for binding to P5 peptide and likewise to CEP. Eight amino acids were analyzed by …

Veteran Teachers’ Perceptions On The Negative Implications Of Classroom Disruptive Behavior And Redirection Strategies, Charvelia Sharae Lewis

Electronic Theses and Dissertations

Classroom teachers are responsible for creating an environment where all students are able to receive an optimal educational experience. However, disruptive behavior demonstrated by students in classrooms often makes it more difficult for teachers to provide quality instruction to all students. The purpose of this qualitative case study was to understand the perceptions of veteran teachers related to student disruptive behavior as well as the redirection strategies utilized to decrease the occurrence of such behavior during instructional time. Along with completing an open-ended survey related to strategies used to address disruptive behavior, the veteran teacher participants shared their experiences in …

Let Me Serve Your Majesty: Psalm 8, Matthew Fredrickson

Electronic Theses and Dissertations

The speaker in Ps 8 proclaims a desire to serve Yahweh’s heavenly power/victory by appealing to humanity’s status as God’s images (Gen 1:27) and accepting the role of Yahweh’s new servant (Isa 55:3), as a priest/minister of God (Isa 61:1-6; cf Isa 42:1). This thesis translates אשר תנה as one word in verse 2b (אשרתנה), rendered, “May I serve your heavenly power/victory!” This is illustrated (in part) by two participles in Ps 8, ינקם (v. 3) and עבר (v. 9), which refer to cosmic foes of Yahweh—“the ones who nurse” (the goodly gods in CAT 1.23) and the “one …

An Economic Analysis Of Using Retired Vessels To Create Artificial Reefs In Costa Rica, Josué González

Electronic Theses and Dissertations

ABSTRACT

The Republic of Costa Rica is a Central American country with only 0.03% of the world’s landmass, but 5% of the world’s biodiversity, making it a leading ecotourism destination. Ecotourism is one of the main sources of revenue for the country, but the degradation of coastal reefs has resulted in a significant loss of financial income for developing areas. As a result, many of these areas are searching for methods to revert the degradation of coral reefs.

Artificial reefs play an important ecological role in marine ecosystems due to their complexity and size. They help in the development of …

Aerial Mineral And Organic Particulate Deposition In East Texas, Sarah Caton, Sarah Caton

Electronic Theses and Dissertations

This study determined the monthly amount, particle size distribution, and chemical composition of particulate deposition in East Texas over a one-year period. It also recognized the seasonal patterns of this deposition as well as its primary origins as either mineral or organic particulate deposition.

The study recorded the monthly mass of deposition, particle size distribution, and the chemical makeup of deposition throughout a period of twelve months at seven sampling locations. SEM-EDS technology was used in conjunction with PCI programming to measure the sizes of depositional particles throughout this time period and identify their chemical composition.

The total yearly deposition …

Stratigraphy, Petrology, Diagenesis, Paleontology, And Depositional Environments Of The Harrisburg Member Of The Kaibab Formation In Northern Arizona And Southern Utah, Zachery T. Case

Electronic Theses and Dissertations

The Kaibab Formation has two members, the Fossil Mountain Member below and the Harrisburg Member above. They were deposited in shallow-marine shelf to restricted coastal settings. Stratigraphically above are the Rock Canyon Conglomerate and the Moenkopi Formation; consisting of the Timpoweap and Lower Red members; which are the only members present in the study area. The Rock Canyon Conglomerate was deposited in depressions and as a regolith. The Timpoweap and Lower Red members were deposited in shallow marine to tidal environments.

Nine stratigraphic units were identified in the Harrisburg Member. Units one, two, three, five, six, seven, and nine are …

Analyzing The Longevity Of Sperm Within The Female Japanese Quail By Assessing Sperm Penetration Of The Perivitelline Layer Under Optimal And Suboptimal Conditions., Garret G. Ashabranner, Joey L. Bray

Electronic Theses and Dissertations

After mating, birds have the ability to store semen within the female reproductive tract. The sperm storage tubules will store and subsequently release semen to travel up the oviduct. Sperm cells that make the trek up the oviduct have a chance to fertilize the ovum. These sperm cells will bind to the perivitelline layer of the ovum and hydrolyze a hole in the perivitelline layer, where it has the possibility to fertilize the female sex cell. Analyzing the number of penetration points on the perivitelline layer is an effective way to analyze reproductive efficiency. Many environmental factor has its effect …

Multiphysics Computational Model Of Fluid Flow And Mass Transport In Aneurysm, Tanja Cupac

Electronic Theses and Dissertations

The abdominal aortic aneurysm is progressive, asymptomatic, and can eventually lead to rupture which is a catastrophic event leading to massive internal bleeding and possibly death. AAA cases have been characterized by the development of an intraluminal thrombus (ILT). The ILT correlates with the progression of hypoxia in the arterial wall. The extent that ILT presence reduces oxygen flux to the wall has not been quantified and there is rather a poor understanding of key parameters that can affect thrombus-mediated oxygen transport in AAA. The purpose of this study is to address this gap and to assess the effects of …

The Influence Of Thomas Aquinas’ Concept Of Createdness On Josef Pieper’S Moral Philosophy, Sarah Slater

Electronic Theses and Dissertations

Josef Pieper’s practical moral philosophy can be best understood by reference to the theology of Thomas Aquinas, and specifically Aquinas’ concept of the created human person. Pieper uses Aquinas’ theological anthropology to argue for three actions which respond to the reality of being created: giving assent to having been brought into existence by God, perceiving God and created reality, and pursuing of the end of human life through the practice of the virtues in order to receive beatitude. Pieper’s well-known works on the seven virtues, on leisure, and on festivity rely on the same concepts from Aquinas which Pieper examines …

Isolation, Structure Elucidation, And Synthesis Of Natural Products From Marine Cyanobacteria, Keren Solomon

Electronic Theses and Dissertations

This thesis describes the isolation, structure elucidation, and synthesis of natural products from marine cyanobacteria. A crude extract from a cyanobacterium collected in Curacao showed selective affinity for the dopamine D₅ receptor in a screen against a panel of CNS receptors. Due to the high similarity of the D₅ and D₁ receptor, to date there are no known ligands that differentiate them. Attempts to purify the compound responsible for this affinity led to the isolation of the known compound caylobolide A. A second extract from a cyanobacterium collected in Panama underwent bioassay-guided fractionation and yielded the novel …

The Dialectic Of Naturgeist In Hegel’S Anthropology: Soul, World, And Bodiliness, Jiho Oh

Electronic Theses and Dissertations

The primary concern of the “Anthropology” section in Hegel’s Encyclopedia of 1830 is the relationship between soul and body: how the soul gains an immediate, bodily existence through embodiment, why and how this immediate mode of the soul’s bodily existence is precarious, and how the soul becomes second nature by overcoming the immediate, bodily existence through habit, more precisely. Importantly, the “Anthropology” is the place in Hegel’s Encyclopedia system where the Philosophy of Nature ends, and the Philosophy of Spirit begins. The thematization of the soul-body relationship in the “Anthropology” is thus essentially framed by a broader, systematic problem concerning …

Differential Expression Of Rna In The Rat Peripheral Nervous System Following Nerve Injury And Treatment With Pain-Relieving Celecoxib-Loaded Nanomedicine, Andrea Stevens

Electronic Theses and Dissertations

The neuroinflammatory response to peripheral nerve injury is associated with chronic pain and significant changes in the expression profiles of RNAs in neurons, glia and infiltrating immune cells: a neuro-immune triad. Chronic constriction injury (CCI) of the rat sciatic nerve provides an opportunity to mimic neuropathic injury and quantitatively assess behavior and differential gene expression in individual animals. Macrophages that phagocytose intravenously injected nanoemulsion carrying the non-steroidal anti-inflammatory, NSAID, Celecoxib, naturally accumulate at the site of injury resulting in relief of CCI behavioral hyper-sensitivity. It is not known beyond the inhibition of cyclooxygenase-2 (COX-2) activity and the reduction in prostaglandin …

Using Functional Communication Training To Reduce Self-Injurious Behavior For Individuals With Autism Spectrum Disorder, Maryam N. Alakhzami

Electronic Theses and Dissertations

The purpose of this study was to examine the effects of functional communication training (FCT) on self-injurious behavior (SIB) of children with autism spectrum disorder (ASD). FCT was utilized and demand fading procedures were added to the original method. The use of FCT to address SIB maintained by negative reinforcement exhibited by children with ASD is supported by an emerging trend of behavioral research. FCT replaces SIB with a new functional communicative response (FCR) that serves the same function as SIB. However, there is a lack of evidence on how to sustain treatment gains obtained after treatment is discontinued. Thus, …

Communication In The Ruins: Walker Percy And The Art Of Symbolic Mediation, Justin Bonanno

Electronic Theses and Dissertations

This dissertation proposes to explore the mediating function of the symbol through the work of Walker Percy. In the first chapter, I provide the necessary background for undertaking this project. First, I situate Percy in his historical moment and review key events in his life that helped to shape his philosophy of communication. Second, I sketch out some of the primary coordinates in Percy’s thought. Percy’s hermeneutic of the self requires an understanding of the difference between sign and symbol, dyadic and triadic events, environment and world, and immanence and transcendence. Third, I review some of the key intersections with …

The Role Of Boredom, Loneliness, And Technology Use As Predictors Of Sexual Responsibility Among Individuals With Autism Spectrum Disorder, Natalie Drozda

Electronic Theses and Dissertations

The purpose of this study was to investigate the predictors of sexual responsibilities (i.e., sex positivity and sexual health as well as sexual risk responsibility) for individuals with autism spectrum disorder. The predictors examined included boredom, loneliness, online risk behavior, intent to use dating apps/websites for casual sex, and intent to use dating apps/websites for romance. Gender differences in sexual responsibility subscales were also explored. ANOVAS yielded women with autism exhibited more sexual responsibility on both subscales than men. Multiple regression analyses were used to determine significant predictors of Sex Positivity and Sexual Health as well as Sexual Risk Responsibility …

Evaluating The Biological Effects And Safety Of Exposure To Low, Putatively Safe Concentrations Of The Common Pesticide Chlorpyrifos Using An Anuran Model, Sara Mcclelland

Electronic Theses and Dissertations

In the US, over 1.1 billion pounds of pesticides are applied annually. Unfortunately, pesticides contaminate natural habitats affecting animal health. Chlorpyrifos (CPF) is an organophosphorous insecticide that contaminates surface waters. Few studies have assessed the impacts of CPF at low, ecologically realistic doses. I aimed to test the effects of low dose CPF exposures on biological parameters including body morphology, hormone levels, and brain development in Northern Leopard Frogs (Lithobates pipiens), a common vertebrate model. To determine if CPF exposure has direct impacts or indirectly impacts animals through the disruption of the food web, I examined CPF exposure …