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Demographics, Sexual Dimorphism, And Ecological Aspects Of Ambystoma Annulatum (Ringed Salamander) In Northwest Arkansas, Usa, Brian M. Becker
Demographics, Sexual Dimorphism, And Ecological Aspects Of Ambystoma Annulatum (Ringed Salamander) In Northwest Arkansas, Usa, Brian M. Becker
Graduate Theses and Dissertations
The need to study and monitor amphibian populations is increasing along with the threats to their population stability and persistence in nature. Northwest Arkansas is one of the fastest growing areas in the nation and with that growth comes rapid changes in land use, massive alterations to habitats, habitat loss, and the introduction of nonnative plants and animals. Ambystoma annulatum (Ringed Salamander) is an Ambystomatid endemic to the Ozark and Ouachita Mountains of southern Missouri, northern and western Arkansas, and eastern Oklahoma giving it a relatively small distribution compared to most Ambystoma. Therefore, Arkansas constitutes a significant portion of the …
Amyloid Fibrils Of Human Fgf-1 Induced By Different Detergents, Zeina Ismael Ibrahem Alraawi
Amyloid Fibrils Of Human Fgf-1 Induced By Different Detergents, Zeina Ismael Ibrahem Alraawi
Graduate Theses and Dissertations
Nature achieves molecular self-assembly through the ordered growth of nanoscale building blocks with high efficiency to fabricate macromolecular architectures. One example of self- assembly is peptides folding onto protein is one of the most astounding biological self-assembly processes. When proteins aggregate to form amyloid fibers, the secondary structure of the protein converts from its native state to a cross-beta-sheet. Fibroblast growth factors (FGFs) possess an essential role in neuronal survival during development. In addition, they are involved in neural stem cell (NSC) proliferation. Fibroblast growth factors (FGFs) are well known to be synthesized in the central nervous system (CNS) and …
Reliability Modeling And Improvement Of Critical Infrastructures: Theory, Simulation, And Computational Methods, José Carlos Hernández Azucena
Reliability Modeling And Improvement Of Critical Infrastructures: Theory, Simulation, And Computational Methods, José Carlos Hernández Azucena
Graduate Theses and Dissertations
This dissertation presents a framework for developing data-driven tools to model and improve the performance of Interconnected Critical Infrastructures (ICIs) in multiple contexts. The importance of ICIs for daily human activities and the large volumes of data in continuous generation in modern industries grant relevance to research efforts in this direction. Chapter 2 focuses on the impact of disruptions in Multimodal Transportation Networks, which I explored from an application perspective. The outlined research directions propose exploring the combination of simulation for decision-making with data-driven optimization paradigms to create tools that may provide stakeholders with optimal policies for a wide array …
Understanding The Kinetics Of Laser-Induced Nanowelding Of Nanoparticles And The Motility Of Bacteria When Faced With Obstacles, Ariel Rogers
Graduate Theses and Dissertations
This dissertation has two focus areas: nanoparticle nanowelding and bacteria motility in the presence of micrometer sized structures. There are two main projects for the nanoparticle nanowelding studies: “Real-time imaging of laser-induced nanowelding in solution” and “Two-color laser-induced nanostructure shape modulation.” For the real-time imaging project, I used a fluorescence microscope, a 405 nm laser, and various python packages to quantify the average size of nanowelded nanostructures as a function of time and found that the average nanostructure growth over time fit the parameters of A¯(t) ∝ c0(1−e−t/τ), where c0 represents the initial concentration of nanoparticles in the solution and …
Trojan Detection Expansion Of Structural Checking, Zachary Chapman
Trojan Detection Expansion Of Structural Checking, Zachary Chapman
Graduate Theses and Dissertations
With the growth of the integrated circuit (IC) market, there has also been a rise in demand for third-party soft intellectual properties (IPs). However, the growing use of such Ips makes it easier for adversaries to hide malicious code, like hardware Trojans, into these designs. Unlike software Trojan detection, hardware Trojan detection is still an active research area. One proposed approach to this problem is the Structural Checking tool, which can detect hardware Trojans using two methodologies. The first method is a matching process, which takes an unknown design and attempts to determine if it might contain a Trojan by …
Tree-Ring Reconstruction Of Ouachita River Streamflow, Keaton Cade Jenkins-Joyce
Tree-Ring Reconstruction Of Ouachita River Streamflow, Keaton Cade Jenkins-Joyce
Graduate Theses and Dissertations
The Ouachita River drains the Ouachita Mountains and Upper Coastal Plain in Arkansas and Louisiana. The Ouachita River is used for navigation, power generation, recreation, water supply, and wastewater treatment. The river has been prone to low flows during drought and extreme flooding, which were principal justifications for the construction of three large multipurpose dams on the stream. It is likely that the use of the Ouachita River will be stressed by future population growth, economic expansion, and climate change. For this study, tree-ring chronologies from various locations in and near the Ouachita River drainage basin were used to reconstruct …
The Effects Of Diet, Size, And Phylogeny On Primate Dental Proportions, Rudolph J. Wilkins
The Effects Of Diet, Size, And Phylogeny On Primate Dental Proportions, Rudolph J. Wilkins
Graduate Theses and Dissertations
It is generally appreciated that there is a relationship between the relative size of the incisors, mandible length, and diet in primates. More specifically, the differences in relative incisor size among primate species are believed to be evolutionary adaptations to their use during food processing and acquisition. While this satisfactorily explains relatively large incisors, it fails to address the relatively small incisor size seen in many taxa. One hypothesis is that there is a trade-off between molar size and incisor size in species with relatively short mandibles. The following study uses two-way ANOVA to evaluate the possibility that spatial constraint …
Where One Puts Wood On The Fire: The Political Economy Of P’Urépecha Urban Neighborhoods At The Site Of Angamuco, Michoacán, Kyle Ryan Urquhart
Where One Puts Wood On The Fire: The Political Economy Of P’Urépecha Urban Neighborhoods At The Site Of Angamuco, Michoacán, Kyle Ryan Urquhart
Graduate Theses and Dissertations
This dissertation seeks to understand the political and economic relationships in the organization and use of neighborhood public space at the archaeological site of Angamuco in Michoacán, Mexico. Ethnohistoric sources describe multiple distinct social classes for the P’urépecha people at the time of European contact, but they are ambiguous about the exact political and economic relationships among them. There is some description of how these different interest groups articulated at the level of the city-state, but there is not much information on the internal dynamics of neighborhood or district-level subdivisions of the city-state. The discovery of the remains of a …
Citizenship And Human Rights: The Path To Reparation, Larissa Rocha
Citizenship And Human Rights: The Path To Reparation, Larissa Rocha
Graduate Theses and Dissertations
Human rights and citizenship are strictly tied together. Without citizenship to a country, one cannot have their human rights guaranteed. In the framework of reparative citizenship, and methodology of feminist political philosophy, I search for solutions for the statelessness and citizenship issues in India and Ukraine. I offer an analysis of the differences and similarities between both cases while going through both countries' colonial histories and understanding their impacts on the issues they are facing today.
Examining The Effects Of Mental Health Barriers On Black Undergraduate Students Attending Predominantly White Institutions, Patrice N. Storey
Examining The Effects Of Mental Health Barriers On Black Undergraduate Students Attending Predominantly White Institutions, Patrice N. Storey
Graduate Theses and Dissertations
Black college students are experiencing mental health issues at an alarming rate. There is, however, a reluctance among Black college students to seek assistance. There is a stigma surrounding mental health. An individual with a mental illness is often stereotyped as weak, uncontrollable, or paralyzed by demons. Historical incidents such as slavery, the Tuskegee Experiment, Jim Crow, and the forced sterilization of Black women have led the Black community to distrust the medical system. The stigma embedded in the Black community is passed down from generation to generation. This literature review examines existing research on Black students and their perception …
Assessment Of Needs And Priorities For Precision Agriculture And Soil Testing In Arkansas, Solomon Frimpong
Assessment Of Needs And Priorities For Precision Agriculture And Soil Testing In Arkansas, Solomon Frimpong
Graduate Theses and Dissertations
Optimum crop production is needed to meet the growing population's food, water, fiber, and energy needs. However, agricultural productivity is hampered by many destabilizing factors such as pest management challenges, declining water quantity, and climate change which threaten long-term food security. Maximizing productivity will require optimizing resources through Precision Agriculture (PA) by supplying inputs based on crop needs. Precision Agriculture offers tools that can be used to optimize crop management practices globally. However, stakeholders’ perceptions and the lack of data-driven site-specific recommendations limit stakeholders’ ability to fully harness the potential benefits of PA. Identification of stakeholder needs and approaches to …
A Cross-Sectional Study On The Impact Of The Covid-19 Pandemic On Sport-Related Concussion Clinical Presentation Within Adolescents And Adults, Emily Mcindoe
Graduate Theses and Dissertations
Introduction. The COVID-19 pandemic spanned across the globe in March 2020 and has since significantly impacted human life. There is evidence that supports symptom exacerbation and an increase in anxiety and depression in clinical presentation post-COVID-19 pandemic compared to pre-COVID-19 for multiple medical diagnoses. These medical diagnoses include migraines, post-traumatic stress disorder (PTSD), obsessive-compulsive disorder (OCD), and mild cognitive impairment. The effect that the pandemic had on the clinical presentation of sports-related concussions is understudied. It is possible that the COVID-19 pandemic has altered the clinical presentation of concussions as seen in other medical diagnoses. Given the increased reporting of …
Quantification Of Dye Degradation On Titanium Dioxide-Based Membranes, Elizabeth Carol Wood
Quantification Of Dye Degradation On Titanium Dioxide-Based Membranes, Elizabeth Carol Wood
Graduate Theses and Dissertations
The purpose of this study was to examine the dye degradation on the titanium dioxide (TiO2)-based membranes. While many studies have shown photocatalytic degradation of dye on TiO2 in solution, few studies have been reported on the solid TiO2 substrate. In this work, a new method is developed to quantify the dye degradation on TiO2-based membranes. A hydrothermal method is used to synthesize the photocatalytic TiO2 nanofibers; vacuum filtration is applied to fabricate a self-assembled membrane. Silver is incorporated into the nanofibers through in situ reduction before vacuum filtration to fabricate Ag/TiO2 membrane in an attempt to red shift the …
Shallow Groundwater Distributions And Changes With Sea Level Rise In Seattle, Washington, Taylor L. Watson
Shallow Groundwater Distributions And Changes With Sea Level Rise In Seattle, Washington, Taylor L. Watson
Graduate Theses and Dissertations
Sea level rise (SLR) associated hazards, such as coastal flooding and erosion, are pressing issues of great concern for coastal communities across the globe. Shallow and emergent groundwater can contribute to groundwater hazards such as flooding, landslides, or damage to shallow infrastructure. This study investigates the shallow groundwater within Seattle, Washington, and projects how it will respond to SLR using interpolation and numerical groundwater modeling methods. Then, a geologic modeling method is presented as a preliminary investigation of heterogeneity and anisotropy within the aquifer system. In the results for the present-day interpolation, ~6 % of the coastal buffer –the total …
Geochemistry Of Metal-Rich Black Shales And Their Genetic Relationship To Mississippi Valley-Type Pb-Zn Ore Deposits, Midcontinent U.S., Noah S. Morris
Geochemistry Of Metal-Rich Black Shales And Their Genetic Relationship To Mississippi Valley-Type Pb-Zn Ore Deposits, Midcontinent U.S., Noah S. Morris
Graduate Theses and Dissertations
The formation of Mississippi Valley-type (MVT) lead-zinc (Pb-Zn) ores is complex, involving an interaction of tectonic compression, hydrothermal fluid migration, and geochemical processes within the subsurface. Fundamental questions regarding this interaction remain unclear, including the source(s) of the Pb and Zn ions that make up the ores. A genetic link between black shales and MVT ores has been thought to exist because of (1) the presence of mature hydrocarbon and brine fluid inclusions within many MVT ores, (2) the association of the hydrothermal fluids that are linked to MVT ore formation with organic compounds and oil-like droplets, and (3) the …
Ism-Band Energy Harvesting Wireless Sensor Node, Fnu Naveed
Ism-Band Energy Harvesting Wireless Sensor Node, Fnu Naveed
Graduate Theses and Dissertations
In recent years, the interest in remote wireless sensor networks has grown significantly, particularly with the rapid advancements in Internet of Things (IoT) technology. These networks find diverse applications, from inventory tracking to environmental monitoring. In remote areas where grid access is unavailable, wireless sensors are commonly powered by batteries, which imposes a constraint on their lifespan. However, with the emergence of wireless energy harvesting technologies, there is a transformative potential in addressing the power challenges faced by these sensors. By harnessing energy from the surrounding environment, such as solar, thermal, vibrational, or RF sources, these sensors can potentially operate …
A Simulated Qualitative Study Exploring Higher Education Faculty's Perceptions Of Factors That Influence Dynamic Decision-Making When Choosing Opportunities For Student Engagement In Asynchronous Online Courses, Leticia De La Garza
Graduate Theses and Dissertations
The purpose of this study was to explore higher education faculty’s perceptions of factors that influence dynamic decision-making when choosing opportunities for student engagement in asynchronous online courses. More specifically, this study sought to understand how faculty in higher education perceived these factors to prevent and facilitate dynamic decision-making when designing instructor presence, student-to-student collaboration, and student-to-academic content engagement opportunities in asynchronous online courses, as Garrison et al. (1999) suggest, for a community of inquiry. There has not been much focus on the dynamic decision-making of online instructors in higher education and a call to continue exploring factors that influence …
Social Media And Mental Health: The Public Health Impact And Future Policy Directives, Renae A. Merrill
Social Media And Mental Health: The Public Health Impact And Future Policy Directives, Renae A. Merrill
Graduate Theses and Dissertations
The relationship between social media use among young people and the increasing concerns of mental health problems in the U.S. and globally is on systemic agendas. Furthermore, research on social media use and mental health indicate reasons to suspect a causal relationship, but more work needs to be done. Therefore, this three-article dissertation seeks to explore (1) associations between social media use, personality, and depression; (2) associations between social media emotional support, anxiety, and personality; and (3) the relationship between social media use and mental health using Deborah Stone’s causal stories framework. Findings from this study provide an improved understanding …
From The Arab World To The United States Of America: The Wellness Of Arab Graduate Women Studying In The U.S., Mariam Mostafa
From The Arab World To The United States Of America: The Wellness Of Arab Graduate Women Studying In The U.S., Mariam Mostafa
Graduate Theses and Dissertations
The pursuit of higher education symbolizes a profound and transformative journey, particularly for international students who embark on the path of studying abroad. This dissertation undertakes an in-depth exploration of the well-being of Arab women pursuing their graduate studies in the United States (US), emphasizing four crucial dimensions of wellness: social, mental/emotional, physical, and financial well-being. Employing a qualitative research methodology, this study delves into the multifaceted experiences of this specific student population and investigates how these experiences impact them. Through a series of interviews and rigorous qualitative analysis, we illuminate the distinct challenges and opportunities that Arab graduate students …
In Vitro And In Vivo Evaluation Of Antimicrobial Activity, Oocyst Sporulation Rate, Oocyst Integrity And Oocyst Infectivity In Eimeria Maxima M6 Oocyst Suspensions Treated With Chlorhexidine Salts In Comparison With Potassium Dichromate, Lauren Laverty
Graduate Theses and Dissertations
Eimeria species oocysts cause coccidiosis, one of the costliest diseases in the poultry industry. Coccidiosis infections cause significant economic losses due to reduced performance in chickens and turkeys. The objective of this thesis was to determine fecal bacterial recovery from chlorhexidine (CHX) salt suspensions containing Eimeria maxima M6 oocysts and evaluate the effect of CHX salts on oocysts during long-term cold storage. For bacterial recovery experiments, CHX digluconate and CHX gluconate were tested at different concentrations on poultry fecal slurries during oocyst shedding. Eimeria maxima M6 oocysts were evaluated in CHX salt suspensions to test the effect on oocyst degradation …
Bayesian Learning Of Spatiotemporal Source Distribution For Beached Microplastic In The Gulf Of Mexico, David Pojunas
Bayesian Learning Of Spatiotemporal Source Distribution For Beached Microplastic In The Gulf Of Mexico, David Pojunas
Graduate Theses and Dissertations
Over the last several decades, plastic waste has gradually accumulated while slowly degrading in terrestrial and oceanic environments. Recently, there has been an increased effort to identify the possible sources of plastic to understand how they affect vulnerable beaches. This issue is of particular concern in the Gulf of Mexico due to the presence of oil, natural gas, and plastic production. In this thesis, we expand upon existing Bayesian plastic attribution models and develop a rigorous statistical framework to map observed beached microplastics to their sources. Within this framework, we combine Lagrangian backtracking simulations of floating particles using nurdle beaching …
Evaluating Garment Fit Perception For Pregnant Women During 1st, 2nd, Or 3rd Trimesters, Nelima Zipporah Barasa
Evaluating Garment Fit Perception For Pregnant Women During 1st, 2nd, Or 3rd Trimesters, Nelima Zipporah Barasa
Graduate Theses and Dissertations
During pregnancy, women experience diverse physical body changes as the pregnancy progresses through different periods. It has been noted that anthropometric changes occur during pregnancy in a non-linear manner and can be measured using 3D body scanners at various stages of pregnancy. The changes are diverse, and impact pregnant women's garment fit differently as the pregnancy progresses through each trimester. Pregnant women have experience in dressing their pre-pregnant bodies in stylish garments and would similarly want to dress fashionably when pregnant. This has led to the need for garments that can accommodate body changes comfortably and fashionably without losing the …
Maximum Depositional Age Analysis Using Paired La-Icp-Ms And Ca-Id-Tims Detrital Zircon U-Pb Geochronology, Benjamin L. Howard
Maximum Depositional Age Analysis Using Paired La-Icp-Ms And Ca-Id-Tims Detrital Zircon U-Pb Geochronology, Benjamin L. Howard
Graduate Theses and Dissertations
The “law of detrital zircons” states that a sedimentary unit cannot be older than its youngest detrital zircon. The youngest U-Pb date(s) from detrital zircon may thus be used to infer a given sedimentary deposit’s maximum depositional age (MDA). MDAs may be calculated in various ways using dates from zircon U-Pb geochronology. Common dating methods used for U-Pb geochronology are laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and chemical abrasion-isotope dilution-thermal ionization mass spectrometry (CA-ID-TIMS), a low- and high-resolution instrument type, respectively. Chapter 2 will systematically compare paired LA-ICP-MS and CA-ID-TIMS dates from the same zircon grains to assess the agreement …
A Study Of Latino Undergraduate Students In Retention Cohorts At The University Of Arkansas, Ramon Balderas
A Study Of Latino Undergraduate Students In Retention Cohorts At The University Of Arkansas, Ramon Balderas
Graduate Theses and Dissertations
Higher education institutions do not have a history of being racially inclusive, and as a result, research and best practices around retention and student success have not been developed for underrepresented and minoritized students. Although there has been a surge in scholarship on diversifying higher education, literature, and identifying best practices focused on retaining students there is less research and literature that looks at Latino students. The study's purpose was to better understand Latino undergraduate student retention patterns at the University of Arkansas, a midwestern public four-year research university. The significance of the study was to assist UA administrators and …
Increasing Accessibility For Hard-To-Reach Cultural Heritage Sites Using Low-Cost Drone Photogrammetry, Eray Can
Graduate Theses and Dissertations
New recording technologies have ushered in a transformative era in archaeological research, with drone photogrammetry emerging as a pioneering tool in this field. This innovative approach leverages unmanned aerial vehicles (UAVs) equipped with high-resolution cameras to capture precise aerial imagery of archaeological sites. Drone photogrammetry offers numerous advantages, such as cost-efficiency, rapid data collection, and the ability to access remote or challenging terrain. By seamlessly integrating photogrammetric techniques, these technologies offer archaeologists the ability to create highly detailed 3D models. This study delves into the principles and applications of low-cost drone photogrammetry in archaeology, highlighting its potential to enhance site …
Data-Centric Image Super-Resolution In Magnetic Resonance Imaging: Challenges And Opportunities, Mamata Shrestha
Data-Centric Image Super-Resolution In Magnetic Resonance Imaging: Challenges And Opportunities, Mamata Shrestha
Graduate Theses and Dissertations
Super-resolution has emerged as a crucial research topic in the field of Magnetic Resonance Imaging (MRI) where it plays an important role in understanding and analysis of complex, qualitative, and quantitative characteristics of tissues at high resolutions. Deep learning techniques have been successful in achieving state-of-the-art results for super-resolution. These deep learning-based methods heavily rely on a substantial amount of data. Additionally, they require a pair of low-resolution and high-resolution images for supervised training which is often unavailable. Particularly in MRI super-resolution, it is often impossible to have low-resolution and high-resolution training image pairs. To overcome this, existing methods for …
Patterns In Winter Stonefly Distribution Along A River Continuum And Land-Use Gradient In Northwest Arkansas Streams, Zachary Tipton
Patterns In Winter Stonefly Distribution Along A River Continuum And Land-Use Gradient In Northwest Arkansas Streams, Zachary Tipton
Graduate Theses and Dissertations
Freshwater ecosystems are facing a crisis with extinction rates of aquatic species exceeding those of their terrestrial counterparts by up to fivefold. This decline is predominantly attributed to evolving land use patterns within watersheds, leading to chemical and physical transformations in freshwater habitats. Northwest Arkansas (NWA) represents one of the fastest-growing regions in the United States, undergoing substantial shifts in land use. Consequently, the status of aquatic life in this region remains uncertain. Addressing this concern, the latest Arkansas Wildlife Action Plan emphasizes the necessity of distribution and population data to guide conservation efforts for Species of Greatest Conservation Need …
Effect Of Cultural Strategies And Application Technologies On Weed Control In Flooded And Furrow-Irrigated Rice, Noah Hunter Reed
Effect Of Cultural Strategies And Application Technologies On Weed Control In Flooded And Furrow-Irrigated Rice, Noah Hunter Reed
Graduate Theses and Dissertations
Weed control is a major problem that rice (Oryza sativa L.) producers face in the Mid-south every growing season. Restricted use of some rice herbicides has also highlighted the need for more research to be conducted on cultural weed control strategies and application technologies in rice. The aim of these studies was to evaluate rice weed control using various rice row widths, bed widths (irrigation-furrow spacing), rice cultivar selection, and nozzle type selection. Three field experiments were conducted in 2021 and 2022 across four sites at Lonoke, AR, Pine Tree, AR, Rohwer, AR, and Stoneville, MS. In experiment one, as …
Impact Of Reducing Ammonia Concentration By Ozone Technology And Its Potential Improvement On Broiler Performance, Odilpio Quintana Ortega
Impact Of Reducing Ammonia Concentration By Ozone Technology And Its Potential Improvement On Broiler Performance, Odilpio Quintana Ortega
Graduate Theses and Dissertations
The employment of ozone in livestock production as a means of mitigating ammonia is used for enhancing air quality within animal confinement facilities, such as swine or poultry barns. Ammonia is a byproduct of animal excrement. Elevated ammonia concentrations can adversely affect the well-being of both animals and humans. The aim of this thesis was to investigate the effects of Ozone Technology Machine Unit (OTMU) utilization in poultry barns regarding ammonia concentration and its potential benefit in terms of broilers performance and welfare. In recent years, there has been a significant boom in technological advances. New devices that help mitigate …
Characteristics Of Award-Winning Children’S Books About Agriculture: An Analysis Of Content, And The Perspectives Of Authors, Illustrators, And Publishers, Addison L. Beckham
Characteristics Of Award-Winning Children’S Books About Agriculture: An Analysis Of Content, And The Perspectives Of Authors, Illustrators, And Publishers, Addison L. Beckham
Graduate Theses and Dissertations
The purpose of this two-article qualitative study was to characterize children's literature about agriculture and to describe the perceptions of authors and illustrators who are responsible for writing and designing these successful publications. This will result in the ability of organizations like Feeding Minds Press to provide writers, illustrators, and publishers with effective strategies and techniques to improve the accuracy and overall quality of children’s literature about agriculture. Few parameters exist for authors of children’s books about agriculture (Biser, 2007). These parameters are necessary to ensure the quality and accuracy of these educational efforts (Serafini, 2012). Though Feeding Minds Press …