Digital Commons Network^™

Deep Learning-Based Surrogate Models For Post-Earthquake Damage Assessment, Xinzhe Yuan

Doctoral Dissertations

"Seismic damage assessment is a critical step to enhance community resilience in the wake of an earthquake. This study aims to develop deep learning-based surrogate models for widely used fragility curves to achieve more accurate and rapid assessment in practice. These surrogate models are based on artificial neural networks trained from the labelled ground motions whose resulting damage classes on targeted structures are determined by nonlinear time history analyses. The development of various surrogate models is progressed in four phases. In Phase I, the multilayer perceptron (MLP) is used to develop multivariate seismic classifiers with up to 50 hand-crafted intensity …

Canyon Wren Nesting In A Tree Cavity In The Santa Rita Mountains, Arizona, Scott T. Olmstead, Erin B. Olmstead

Arizona Birds

No abstract provided.

Distribution And Occurrence Of Eared Quetzal In The United States: A 45-Year Review Of The Eared Quetzal In Arizona And New Mexico, 1977-2021, Peg Abbott

Arizona Birds

No abstract provided.

Ticks And Novel Chigger Mite Species On Passerine Birds In Southeastern Arizona, Kathleen Groschupf, James W. Mertins

Arizona Birds

We document the combined occurrences of one immature tick species (Amblyomma cf. triste), 2 known chigger mite species, Euschoengastia numerosa and Neoschoengastia americana, and 4 undescribed species of Neoschoengastia chiggers attached to individuals of 11 bird species in southeastern Arizona. Groschupf incidentally discovered clusters of the orangecolored chiggers while examining migrant and local birds for Amblyomma cf. triste, a hard tick documented as uncommon and discontinuously widespread in southeastern Arizona, southern New Mexico, West Texas, and northwestern Mexico. All of these ectoparasite collection records are new for these particular bird host species in Arizona, and Savannah Sparrow (Passerculus sandwichensis) is …

Validation Of Edna Metabarcoding : A Comparison To Traditional Survey Methods In Ozark Streams, Veronica Marian Lee

Masters Theses

Environmental DNA (eDNA) sampling provides a method for assessing fish communities that has potential as a supplement to traditional sampling methods due to its ability to save time as well as its non-invasive nature. This is a method in which from just one sample, eDNA from multiple individual species are able to be sequenced in tandem and the resulting reads identified to describe a community. In order to evaluate this technique and its efficacy for monitoring fish community diversity, we collected water samples alongside surveys performed by the Missouri Department of Conservation sampling program in summers 2020-21. DNA were extracted …

B-Sure (Bereavement Support Research): The Differential Experiences Of Peer And Professional Support In Grief, Andrea Crowley

Theses and Dissertations (Comprehensive)

Abstract

The project aimed to investigate the differential experiences of those who have received peer or professional support for grief and bereavement. Although much is known with regards to the perceived impacts of peer and professional support in general, there is little research surrounding these support types in the context of grief and bereavement, the potential for these support types to be complementary, and how the COVID-19 pandemic may have impacted the experiences of those receiving these forms of support. The main goal of this project was to address a significant gap in the literature by investigating the following questions: …

First Language Loss And Maintenance In Adolescents And Young Adults From Immigrant Backgrounds, Wanxin Li

Theses and Dissertations (Comprehensive)

Abstract

Language attrition is a documented phenomenon that occurs when individuals progressively lose their first language (Schmid et al., 2007). This is particularly common among individuals who relocate to a country that speaks a foreign language that differs from their first language, as the societal language eventually becomes their dominant language. Deterioration and loss of the first language (L1) may result in consequences such as loss of ethnic and cultural identity, leading to the loss of a link to one’s country of origin (Cho & Krashen, 1998). Thus, the present study examined factors that may contribute to L1 attrition. The …

Community Stress And Resilience During Covid-19: Assessing The Emotional Profile Of The City Of Hamilton Using A Social Media Analysis, Senyo Agbeyaka

Theses and Dissertations (Comprehensive)

This study investigated stress and resilience at the neighbourhood level in Hamilton Ontario in pre- and peri-pandemic conditions using a social media analysis. Sentiment analysis of geo-located Twitter posts produced within Hamilton census tract boundaries was conducted using Stresscapes and EMOTIVE, validated software that extract and code emotional information from human language expressions about stress and hope (a proxy for stress), respectively. Baseline levels of both emotions were measured using aggregate scores at the census tract level in Hamilton from tweets produced during two pre-pandemic periods (March 2019 to July 2019; and August 2019 to February 2020), with a replication …

Fifth-Dimensional Warfare And National Security In Canada: Situating Microdeviation Theory Within C-59: An Act Respecting National Security Matters, Hayden Slight

Theses and Dissertations (Comprehensive)

In an era of rapid technological change, the growing threat environment in the cyber dimension will continue to influence how a sovereign nation contends with attacks that can occur from any corner of the world. The growing adaptation and expansion of technology belonging to the Internet of Things (IoT) and the increasing prevalence of social media (Facebook, Twitter) has also influenced the spreading of attack surfaces that can become victim to exploitation by motivated parties including foreign states and terrorist groups. Against this backdrop, Canada’s own efforts to modernize and reinforce its own national security agencies resulted in the developing …

Adaptive Capacity And Mobility In The Bahamas: Examining The Social Costs Of Displacement In Response To Hurricane Dorian, Kearney Coupland

Theses and Dissertations (Comprehensive)

In 2021, over 30 million people were displaced by disasters, most of which were weather related and nearly half of which were the result of storms. While research on disaster displacement has provided broad observations of post-hurricane human mobility and the socioeconomic and demographic characteristics that influence displacement, few studies examine the factors that influence household mobility decisions after a disaster. My dissertation uses a primarily qualitative research approach to empirically investigate the relationship between mobility and the capacity of displaced households to cope and adapt to the impacts of hurricanes through a detailed examination of Hurricane Dorian displacement in …

“What If This Happiness Doesn’T Last Forever?”: Stressors Faced By Racialized Sogie Refugees, Moni Sadri-Gerrior

Theses and Dissertations (Comprehensive)

Racialized refugees with diverse SOGIE (Sexual Orientation, Gender Identity, and Expression) experience the unique intersection of racism, homo- and/or transphobia, and anti-refugee sentiments. As a result, this group (herein: racialized SOGIE refugees) often face poor mental health and well-being. The purpose of this study is to identify stressors faced by racialized SOGIE refugees in Ontario through the lens of Meyer’s Minority Stress Theory and Crenshaw’s intersectionality theory. The interviews from ten racialized SOGIE refugees and two service providers living in Ontario were taken from a larger study looking at the life trajectories of SOGIE refugees. Participants identified both explicit and …

Synthesis And Characterization Of Chitosan Derivatives Intended For Gene Delivery Applications, Alex M. Mcmullen

Graduate Theses/Dissertations

Chitosan has been studied as a non-viral vector capable of efficient gene delivery due to its favorable properties such as biodegradability, biocompatibility, and is non-toxic to mammalian cells. Incorporating electrostatic interactions in non-viral vectors enhance the vector permeability. This work focuses on two parts. Firstly, cationic chitosan derivatives were synthesized using quarternary ammonium and phosphonium groups. This was achieved by coupling carboxylic acid ligands with these quarternary groups to chitosan through an amide bond. The carboxylic acid ligands were synthesized from 4-methylbenzoic acid and either triethyl phosphine or triethyl amine. The ligand was then attached to chitosan through an amide …

Identification Of A Novel Protein Interaction That Elucidates The Mechanism Of Idiopathic Recurrent Miscarriages In Women With Nlrp2 Mutations, Nayeon Son

Graduate Theses/Dissertations

The protein NOD-Like receptor pyrin domain containing 2 (NLRP2) is one member of a larger family of protein receptors that plays an important role in our innate immune system. In humans, the NLR family consists of 22 proteins. However, only about a half of NLRs’ functions are known, but many are pro-inflammatory, causing inflammation. NLRP2 has been identified to be a maternal effect gene regulating early embryo development in idiopathic recurrent miscarriages. In previous studies, mutations in the NLRP2 gene resulted in genetic maternal imprinting disorders due to NLRP2 regulating DNA methylation. However, the exact mechanisms involved in recurrent miscarriages …

An Exploratory Analysis Of Bias Formation, Prejudice, And Discrimination Through Contextual And Functional Similarities Using The Theoretical Framework Of Relational Density Theory, Elana Keissa Sickman

Graduate Theses/Dissertations

Behavior Analysis “attempts to improve the human condition through behavior change”, with behavior being the primary target (BACB, n.d.). However, considering the way people perceive, interact with, and establish relational frames within different contexts is widely misunderstood. Much of this research has expanded on the components found in Stimulus Equivalence (SE) and Relational Frame Theory (RFT) by providing a more modern approach to examining language and its treatment approach. Relational responding of individuals and groups may contribute to implicit biases, prejudice, and discrimination as well as how they operate within nested contingency systems. While critical theorists have provided foundations for …

Analysis Of Root System Architecture And Qtl Identification In Grapevines, Sujan Thapa

Graduate Theses/Dissertations

The root system of the plant plays a vital role in water and nutrient uptake. Native North American grapevines adapted to a broad range of climatic and soil conditions, which led to the evolution of diverse root system architecture (RSA) within the Vitis genus. Despite the importance of RSA in viticulture, little is known about the genetic basis of the RSA in grapevine. I used novel root phenotyping tool, RhizoVision Analyzer to characterize the root system of 208 genotypes of an F₁ grapevine progeny obtained from a cross between Vitis rupestris Scheele B38 and Vitis riparia Michx. HP-1. Dormant …

Role Of Cyclophilin A And Trim5Α In Hiv-1 Infection And Capsid Uncoating, Emma Lk Wise

Graduate Theses/Dissertations

Microglial cells are immune cells that protect the central nervous system and are subject to HIV- 1 infection. HIV-1 infection of these cells can lead to HIV Associated Neurocognitive Disorders (HAND). Since HIV-1 only codes for 15 different proteins, the virus also uses cellular factors, like Cyclophilin A (CypA), to assist in viral replication. The cell also has antiretroviral restriction factors, like tripartite motif-containing protein 5 (TRIM5α), to protect against infection. The goal of this project is to investigate the role of CypA in the early steps of HIV-1 replication and TRIM5α restriction in microglial cells. I hypothesize that CypA …

Garlic Curing: Post-Harvest Nutrient Remobilization From Leaves To Cloves, Mary L. Books

Graduate Theses/Dissertations

Garlic (Allium sativum L.) is grown on small and large scales worldwide. After harvesting, garlic undergoes a drying process for long-term preservation, called curing. Some producers cure with leaves intact, while others will remove and discard the leaves, curing only the bulbs. Due to the ability of plants to remobilize nutrients from leaves to underground storage organs, such as bulbs, the curing method of garlic may affect clove nutrient content. This study explores nutrient remobilization responses in garlic when cured with leaves intact compared to leaves separated from bulbs. Four cultivars of garlic, German White, Chesnok Red, Romanian Red, and …

Intercropping Grain Sorghum Into Established Rhizoma Peanut: Greenhouse And Field Studies, Erika Hm Cooperman

Graduate Theses/Dissertations

Land degradation and urbanization are among the top factors pushing the Kenyan Maasai community into an unstable future, with food insecurity and poverty amidst the most fragile components. Implementing conservation agricultural techniques into the Maasai nomadic lifestyle could potentially lead to a diversification of finances and food security. Intercropping is one technique of conservation agriculture that could provide the Maasai both. The main objective of this study is to evaluate the effects of creating an intercropped environment between rhizoma peanut and grain sorghum. A greenhouse study was conducted from late 2020 to 2021 in an effort to investigate the effects …

The Role Of Actin Associated Sptbn1 Host Factor In Hiv-1 Infection In Microglial Cells, Hannah Matheney

Graduate Theses/Dissertations

Human immunodeficiency virus (HIV) is a chronic illness affecting more than 32.7 million individuals worldwide. The virus infects immune cells, weakening the immune system overtime eventually leading to acquired immunodeficiency syndrome (AIDS) if left untreated. Infection starts with a fusion step, followed by uncoating of the HIV capsid once in the cytoplasm of the cell. HIV uses host cell proteins to complete the infection process, like the actin associated factor, SPTBN1. The Hulme lab has previously shown that SPTBN1 knockdown by siRNA in microglial cells decreased HIV infection and delayed uncoating of HIV. Because fusion is prior to uncoating, it …

Downstream Dispersal Of Fine Tailings, Chat And Metals In Channel Sediment Of Big River, Old Lead Belt, Southeast Missouri, Jennifer Pace Witt

Graduate Theses/Dissertations

In St. François County, Missouri, compromised above-ground tailings piles and containment ponds from historical mining activities in the Old Lead Belt released considerable amounts of dolomitic, Pb- and Zn-contaminated waste sediments to the Big River, contributing to significant downstream floodplain and channel sediment contamination. Previous studies have documented the effects of heavy metals on Big River biota and water quality, as well as benthic habitat disruption resulting from the influx of small sediments. Few have considered the effects and future contamination risk of the coarse waste sediments (2-16 mm in diameter), locally called “chat”, which retain high Pb and Zn …

A Study Of Cobalt (Iii) Oxide Nanoparticle Delivery Of Sirna Molecules Directed Against Signaling Intermediates Of The P2y2 Receptor, Rachel Blair Stroud

Graduate Theses/Dissertations

G protein-coupled receptors are evolutionarily ubiquitous sensors of extracellular signals, propagating intracellular signal cascades through heterotrimeric G proteins. P2Y₂ receptors are GPCRs which are activated by extracellular nucleotides to mediate signaling cascades via Gαq coupling. Many GPCRs are subject to a common mechanism for signal termination involving phosphorylation of the C-terminal tail followed by β-arrestin binding and subsequent endocytic internalization of the complex. This effect has been described for the P2Y₂ R in the 1321N1 astrocytoma cell line, and UTP-induced activation and desensitization profiles have been previously defined. There is need to develop molecular vehicles for safe and …

Reducing Family Risk Factors Caused By Poverty Through Family Support Services, Aaliyah C. Williams

Graduate Theses/Dissertations

This study aims to determine whether preventative measures are effective if implemented while a family is in crisis, through Family Support Services (FSS), to alleviate Risk Factors, prevent family separation and ensure prolonged family stability, instead of as services to reunify a family that already separated due to a lack of resources. This study examined the Poverty Related Risk Factors of Homelessness, Single Parenthood, and Unemployment as Risk Factors that families enrolled in Ozarks Area Community Action Corporation (OACAC) Head Start experience as negative influences on child development and Family Unity and analyzed OACAC Head Start’s implementation of FSS as …

Effectiveness Of Stabilized Hypochlorous Acid In Acute Peritonitis Treatment: A Murine Surgical Study, Benjamin Michael Pomeroy

Graduate Theses/Dissertations

Peritonitis is an inflammatory condition affecting the mesothelial cells that line the peritoneal cavity and is commonly induced by bowel perforations. This medical emergency is treated through antibiotic therapy and surgical intervention followed by tissue irrigation (lavage). Acute treatments aim to remove the bacterial burden, however recurring peritoneal infections occur at high rates and contribute to patient morbidity. These recurring infections are likely due to the inability of lavage solutions to remove the entire massive intra-abdominal bacterial load due to intestinal perforation. Numerous antiseptic solutions and antibiotic additives have been evaluated in their ability to improve source control by abdominal …

On The Synthesis And Characterization Of Bimagnetic Coo/Nife2o4 Heterostructured Nanoparticles, Muhammad Sharif Uddin

Graduate Theses/Dissertations

Bimagnetic nanoparticles show promise for applications in energy efficient magnetic storage media and magnetic device applications. The magnetic properties, including the exchange bias of nanostructured materials can be tuned by variation of the size, composition, and morphology of the core vs overlayer of the nanoparticles (NPs). The purpose of this study is to investigate the optimal synthesis routes, structure and magnetic properties of novel CoO/NiFe2O4 heterostructured nanocrystals (HNCs). In this work, I aim to examine how the size impacts the exchange bias, coercivity and other magnetic properties of the CoO/NiFe2O4 HNCs. The nanoparticles with sizes ranging from 10 nm to …

Testing The Impact Of A Silencing Suppressor On Infectivity Of Grapevine Vein Clearing Virus Infectious Clone In Nicotiana Benthamiana, Wen Zhao

Graduate Theses/Dissertations

Grapevine vein clearing virus (GVCV), the first DNA virus of the Badnavirus genus discovered in grapevines, is closely associated with grapevine vein-clearing disease. Through earlier research, Koch's postulates were partially met: GVCV was in all diseased plants; GVCV was introduced into a healthy grapevine through grafting and by aphids and caused the disease. However, more shreds of evidence are required to fulfill the last postulate, the same virus must be reisolated from the inoculated diseased grapevine (1). A full-length infectious clone of GVCV was previously constructed to provide evidence; however, its infectivity was not consistent. Therefore, the goal …

The Synthesis And Characterization Of Pb(Ii) Cyanoximates, Patricia Mcdaniel

Graduate Theses/Dissertations

A new series of Pb(II) cyanoximates were synthesized and characterized by elemental analysis (C, H, N, S), IR spectroscopy, thermal analysis, and X-ray crystallography. The goal was to synthesize compounds with a PbL₂ (L= selected known chelating cyanoximes) composition for use as potential new non-linear optical (NLO) materials, specifically second harmonic generators (SHG), which must belong to non-centrosymmetric space groups. A desktop procedure using Pb²⁺ is chosen due to its typically active 6s² lone pair of electrons, which are known to distort central polyhedra. A 1:2 ratio of Pb(II) to ligand were used to synthesize bulk products …

Effects Of Natural Products On Inflammation, Riley Ann Nadler

Graduate Theses/Dissertations

Chronic inflammation is characterized by infiltration of inflammatory cells such as macrophages and lymphocytes into the tissue where they produce inflammatory cytokines that contribute to tissue damage. Worldwide, 3 out of 5 people die due to chronic inflammatory diseases like cardiovascular diseases, obesity, diabetes, and cancer. Since it is well-documented that diet and metabolism are key mediators of inflammation, I investigated the effects of dietary lectins on inflammatory cytokine production and the ability of sodium pyruvate, a metabolite, to decrease inflammation. In chapter 1, I examined the effect that lectins from either Triticum vulgaris (common wheat) or Phaseolus vulgaris (common …

Emotion Validating Language Regarding Negative Emotions In The Classroom Differing By Gender And Emotion Type, Tea Rose Pankey

Graduate Theses/Dissertations

This study examined teachers’ emotion validating language regarding negative emotion in early childhood classrooms. By analyzing teachers’ emotion language differing by gender, the research highlights the gendered socialization of emotional expression, especially regarding negative emotions, in early childhood contexts. In toddler and preschool classrooms, 28 teachers were video recorded during 4 thirty-minute sessions of free play time. Videos were coded for teachers’ emotion language regarding negative emotions with attention to the gender of the child to whom the language was spoken. Results indicate that teachers validate negative emotions more to girls than to boys. This aligns with previous research that …

Impact Of Co-Culturing Bacteria Upon Antibiotic Production, Zora Westwalewicz

Senior Honors Theses and Projects

The lack of new antibiotics capable of treating the ever-increasing number of antibiotic-resistant bacterial infections reflects the difficulty of finding new antimicrobial compounds. Most antibiotics were originally discovered from microorganisms that were grown in isolation. The interspecies interactions involved in co-culturing microbes, growing two or more strains together, can impact the types and increase production levels of antimicrobial compounds compared to monocultures. The purpose of this study was to determine whether co-culturing antibacterial producers would result in increased antibiotic production. Mixed student samples from the EMU Tiny Earth lab were utilized for this study because there was a higher chance …

The Effect Of Autophagy Related Protein 10 And Its Mutants On Autophagic Activity, Sk Nadia Rahman Silvia

Senior Honors Theses and Projects

Autophagy is the cellular degradation process in which cellular contents are encapsulated by double-membrane vesicles, autophagosomes, and delivered to the vacuole to be degraded and recycled. This process is important for cell health and homeostasis. There are approximately 32 different autophagy-related proteins involved. Atg10 is an enzyme that may affect overall autophagic activity by changing autophagosome size and/or number. Our goal is to find mutants that cause a significant, partial loss in Atg10’s activity by mutating some residues near the active site and testing the functionality of these mutants by performing western blots and enzymatic assays. Here we show that …