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Deep Learning-Based Radio Frequency Interference Detection And Mitigation For Microwave Radiometers With 2-D Spectral Features, Ahmed Manavi Alam Aug 2024

Deep Learning-Based Radio Frequency Interference Detection And Mitigation For Microwave Radiometers With 2-D Spectral Features, Ahmed Manavi Alam

Theses and Dissertations

Radio frequency interference (RFI) poses significant challenges for passive microwave radiometry used in climate studies and Earth science. Despite operating in protected frequency bands, microwave radiometers often encounter RFI from sources like air surveillance radars, 5G communications, and unmanned aerial vehicles. Traditional RFI detection methods rely on handcrafted algorithms designed for specific RFI types. This study proposes a deep learning (DL) approach, leveraging convolutional neural networks to detect various RFI types on a global scale. By learning directly from radiometer data, this data-driven method enhances detection accuracy and generalization. The DL framework processes raw moment data and Stokes parameters, dynamically …

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Biomass Conversion Models For Selected Pines In The Southern United States, Chris Driskill Aug 2024

Biomass Conversion Models For Selected Pines In The Southern United States, Chris Driskill

Theses and Dissertations

Current carbon and bioenergy markets shifted the focus of typical forest attribute estimation from volume to biomass. We used multiple linear regression and the dataset collected as part of the National Scale Volume and Biomass modeling effort to develop biomass prediction models for Pinus taeda L., Pinus elliottii Engelm. var. elliottii, Pinus echinata Mill., and Pinus palustris Mill. In addition to utilizing traditional forest measurements such as diameter at breast height and total tree height, biomass was estimated as functions of volume, latitude, and longitude. We also evaluated the differences in wood density by geographic location for these species. The …

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Efficacy Of Recycled Glass Cullet As A Soil Substrate For U.S. Gulf Coast Salt Marsh Restoration, Ansley Levine Aug 2024

Efficacy Of Recycled Glass Cullet As A Soil Substrate For U.S. Gulf Coast Salt Marsh Restoration, Ansley Levine

Theses and Dissertations

Recycled glass cullet is a potential alternative to fill substrate in salt marsh restoration projects, given its similarity to natural silica sands. However, the ability for common salt marsh plants to grow in glass cullet has not yet been tested. An outdoor mesocosm experiment assessed the ability of the dominant mid-marsh plant Juncus roemerianus and the upland marsh plant Spartina patens to grow in various mixtures of glass cullet versus fill soil. Results showed that J. roemerianus can survive in glass cullet, but growth declined as the proportion of cullet increased. However, S. patens grew comparably, if not better, in …

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Application Of Numerical Weather Prediction With Machine Learning Techniques To Improve Middle Latitude Rapid Cyclogenesis Forecasting, Colin Matthew Snyder Aug 2024

Application Of Numerical Weather Prediction With Machine Learning Techniques To Improve Middle Latitude Rapid Cyclogenesis Forecasting, Colin Matthew Snyder

Theses and Dissertations

This study goal was to first determine the baseline Global Forecast System (GFS) skill in forecasting borderline (non-bomb:0.75-0.95, bomb: 1.-1.25) bomb events, and second to determine if machine learning (ML) techniques as a post-processor can improve the forecasts. This was accomplished by using the Tempest Extreme cyclone tracking software and ERA5 analysis to develop a case list during the period of October to March for the years 2008-2021. Based on the case list, GFS 24-hour forecasts of atmospheric base state variables in 10-degree by 10-degree cyclone center subdomains was compressed using S-mode Principal Component Analysis. A genetic algorithm was then …

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Examination Of The Impact Of Discriminatory Legislation On Gender Minority Stress And Suicide Desire And Intent In Gender Minority Adults, Ashley R. Pate Aug 2024

Examination Of The Impact Of Discriminatory Legislation On Gender Minority Stress And Suicide Desire And Intent In Gender Minority Adults, Ashley R. Pate

Theses and Dissertations

Suicidal ideation and suicide attempt rates are far higher among gender minority individuals than in the general population. In the wake of an unprecedented number of anti-LGBTQ+ legislation being proposed and passed in 2023 in the United States, this study sought to examine the impact of this legislation on gender minority stress and suicidal desire and intent among gender minority adults. Results indicated that anxiety about the legislation was associated with the desire to die, perceived burdensomeness, thwarted belongingness, and the likelihood of attempting suicide in the future. The perceived impact of the legislation was associated with intent to die …

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The Conservation Genetics Of Elassoma Alabamae And Phylogeography Of Elassoma Evergladei, David Lee Pounders Aug 2024

The Conservation Genetics Of Elassoma Alabamae And Phylogeography Of Elassoma Evergladei, David Lee Pounders

Theses and Dissertations

The southeastern U.S. is a hotspot of aquatic biodiversity and endemism in the upland and Coastal Plain regions. One component of this biodiversity is the Pygmy Sunfishes of the genus Elassoma. I used next-generation sequencing to aid in the understanding and conservation of these enigmatic fish. My first chapter focused on one of the most restricted species in the U.S. the Spring Pygmy Sunfish Elassoma alabamae. In this study I found four distinct genetic populations, evidence of founder effects, and that a newly discovered population is native. My second chapter focused on the Everglades Pygmy Sunfish Elassoma evergladei a more …

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Examining The Impact Of De-Escalation Training For Rural Mississippi Leos: Using Simulation To Assess Behavioral Outcomes, Deepali Manoj Dhruve Aug 2024

Examining The Impact Of De-Escalation Training For Rural Mississippi Leos: Using Simulation To Assess Behavioral Outcomes, Deepali Manoj Dhruve

Theses and Dissertations

People with mental illness (PMI) are at a 67% greater risk of arrest and 16 times greater risk of being killed during a police incident than other civilians. Indeed, law enforcement officers (LEOs) report lacking expertise when addressing mental health calls, and existing trainings aimed at reducing violence in LEO encounters with PMI do not account for challenges specific to rural LEOs. Additionally, many trainings are severely lacking in assessing outcome changes pre- and post-training with more than half of trainings relying on survey-based knowledge subject to social desirability bias and inaccurate self-assessment. This study aimed to address limitations in …

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Investigating Differences In Perceived Value And Opportunities For Student Professional Development In Chemistry Graduate Programs, Contessa L. Maggard Aug 2024

Investigating Differences In Perceived Value And Opportunities For Student Professional Development In Chemistry Graduate Programs, Contessa L. Maggard

Theses and Dissertations

The primary focus of chemistry graduate programs in R1 universities in the United States (US) is training students to become research scientists. However, additional skills, such as effective presentations, writing practical proposals, teaching, mentoring, and networking, are essential for successful careers. This study evaluates the emphasis on professional development skills in R1 chemistry graduate programs in the US, as perceived by graduate students and professors, and their perceived adequacy in preparing graduate students for academic careers. A questionnaire survey of current graduate students and faculty members was conducted. Results indicated that current graduate students perceived a lack of development opportunities …

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Impacts Of Quality On Cotton Hedging And Basis, Jacob Epperson Aug 2024

Impacts Of Quality On Cotton Hedging And Basis, Jacob Epperson

Theses and Dissertations

The main objective of this study is to analyze the effects cotton quality has on hedging and basis movements within the cotton market to help market participants minimize price risk. The effectiveness of using cotton futures in hedging price risk will be determined by calculating optimal hedge ratios by tenderable quality. Hedge ratios will be calculated using simple differences and error correction models (ECM) on overlapping price data, estimated under both generalized least squares (GLS) and maximum likelihood estimation (MLE). An empirical analysis shows that as cotton quality improves, the optimal hedge ratio decreases. ECMs estimated under GLS are found …

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An Examination Of Depressive Symptoms Of African Americans As A Part Of A Complex System, Jenna Kilgore Aug 2024

An Examination Of Depressive Symptoms Of African Americans As A Part Of A Complex System, Jenna Kilgore

Theses and Dissertations

Symptoms associated with Major Depressive Disorder (MDD) have become a source of distress and disability throughout the world, and MDD is among the most common disorders diagnosed annually in the United States. Despite this growing epidemic, scientists and practitioners continue to conceptualize MDD using a common-cause model, which suggests MDD is a result of a latent depression entity that gives rise to symptoms. This is particularly problematic in African American populations where some symptoms associated with depression (i.e., irritability and pain or numbness in the body) are different than those listed in the DSM. The current study examined depressive symptoms …

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Estimation Of Cyanobacterial Concentrations From Uncrewed Aircraft Systems Imagery Over The Western Mississippi Sound, Gulf Of Mexico, John Preston Liles Aug 2024

Estimation Of Cyanobacterial Concentrations From Uncrewed Aircraft Systems Imagery Over The Western Mississippi Sound, Gulf Of Mexico, John Preston Liles

Theses and Dissertations

The Western Mississippi Sound (WMS) is home to the largest natural oyster reef in the Gulf of Mexico and contributes substantially to Mississippi's economy. In 2019, the WMS experienced an unprecedented cyanobacterial bloom that killed fish and birds and led to shut down of beaches and oyster fishery. This thesis aims to quantify cyanobacteria from uncrewed aircraft systems (UAS) imagery and investigate the relative influence of river discharge into the WMS on cyanobacterial concentrations. Several field campaigns were undertaken to collect field data and UAS imagery from WMS. A remote sensing algorithm was developed to quantify the unique cyanobacterial pigment …

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Using Phenological And Physiological Data To Improve Bioenergy Feedstock Production Of Populus In The Southeastern United States, Jiaxin Wang Aug 2024

Using Phenological And Physiological Data To Improve Bioenergy Feedstock Production Of Populus In The Southeastern United States, Jiaxin Wang

Theses and Dissertations

Climate change poses a significant threat to bioenergy production, impacting plant’s phenology and physiological performance. Investigating the adaptation of bioenergy crops like Populus is crucial for sustaining production. Populus, known for its genetic variation and ease of study, offers insights into tree responses to climate change. My research, part of the Advancing Populus Pathways in the Southeast (APPS) project, focuses on various Populus genotypes across multiple growing seasons, exploring phenology under different management strategies. Planting Populus across two sites, namely Monroe and Pontotoc, allows for the examination of genotype responses to climate change factors, particularly in terms of phenology and …

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Source Contributions To Nekton Diet In An Oligohaline Ecosystem, Keith Antoine Chenier Aug 2024

Source Contributions To Nekton Diet In An Oligohaline Ecosystem, Keith Antoine Chenier

Theses and Dissertations

West Back Bay in Biloxi, Mississippi is an oligohaline estuary. Salt-tolerant submerged aquatic vegetation (SAV) and saltmarsh grasses are found ubiquitously throughout this estuary with Vallisneria americana and Juncus roemerianus being the dominant SAV and saltmarsh vegetation. No studies have directly evaluated the role of these vegetation species in the food web. Carbon and sulfur stable isotope analyses were used to identify primary source contributions to fishes Menidia beryllina, Fundulus grandis, and Lepomis macrochirus. Isotopic niche overlap was compared between fishes and basal carbon sources bimonthly from May 2021 through May 2022. Fishes had greater than 50% isotopic niche overlap …

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Characterizing Threats To Coastal Forests By A Native Defoliator And Non-Native Woodborer, Kristy Marie Mcandrew Aug 2024

Characterizing Threats To Coastal Forests By A Native Defoliator And Non-Native Woodborer, Kristy Marie Mcandrew

Theses and Dissertations

Coastal forests are facing threats due to rising sea levels, increased storm severity, and land use change. These factors stress trees within coastal ecosystems, potentially predisposing them to attack by insects. In North America, two insect species of concern that pose threats to for coastal forest health are the native baldcypress leafroller (BCLR), Archips goyerana Kruse (Lepidoptera: Tortricidae), and non-native Japanese cedar longhorned beetle (JCLB), Callidiellum rufipenne Motschulsky (Coleoptera: Cerambycidae). Baldcypress leafroller has been reported from Mississippi and Louisiana, with defoliation only reported from the latter where increased flooding has stressed host trees. Through widespread trapping efforts, I found that …

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Evaluating Depictions Of Representation: An Analysis Of Female Law Enforcement Officers In Prime-Time Fictional Entertainment Television, Linda Christine Williams Aug 2024

Evaluating Depictions Of Representation: An Analysis Of Female Law Enforcement Officers In Prime-Time Fictional Entertainment Television, Linda Christine Williams

Theses and Dissertations

This study looked at uniformed female municipal police officers in fictional entertainment television shows that were centered around law enforcement. Building on previous research by Evans and Davies, this replication study uses a content analysis model to look at city level police, as opposed to the female federal agents from Booker’s 2018 study. This project builds on earlier work that looked at portrayals of female law enforcement officers in entertainment television and applies a framework of Representative Bureaucracy, Cultivation Theory, and Social Construction of Reality to find at their intersection, answers about the construction of the street-level bureaucrats who are …

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Effects Of Acute Alcohol Treatment On Macrophage Polarization, Liyuan Liu Aug 2024

Effects Of Acute Alcohol Treatment On Macrophage Polarization, Liyuan Liu

Theses and Dissertations

Alcohol is an underestimated toxicant, and binge drinking is increasing rapidly. Macrophages are important immune cells characterized by heterogeneity and can be polarized into pro-inflammatory and anti-inflammatory phenotypes.To elucidate the effects of acute alcohol exposure on macrophage polarization and function, we established an optimized multi-parameter flow cytometry panel, assessed the impact of acute alcohol on macrophage polarization, developed macrophage polarization models, and proposed novel indices for a refined understanding of macrophage polarization status.First, we developed a flow cytometry panel quantifying eleven markers critical to macrophage polarization within the RAW 264.7 cell line. Inducing specific polarization states with IFN-γ ± LPS …

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Investigating The Effects Of Multiple Concussions On Neuropsychological Performance, Michaela S. Patoilo Aug 2024

Investigating The Effects Of Multiple Concussions On Neuropsychological Performance, Michaela S. Patoilo

Theses and Dissertations

It has been well-established in the literature that a history of concussion makes individuals more susceptible to sustaining subsequent concussions. However, there is little neuropsychological evidence of how sustaining multiple lifetime concussions affects cognitive functioning in the general adult population. It is known from previous traumatic brain injury and single concussion literature that impairments in cognitive performance across domains often follow the initial injury, and exploratory studies have shown that multiple concussions can have a measurable impact on cognition. However, existing research is often limited by its reliance on archival data and abbreviated neuropsychological batteries. Therefore, the current study aimed …

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Predictions Of Thermo-Fluid Transport Over A Poultry Incubation Period Using High Performance Computing, Melvy Fernandes Aug 2024

Predictions Of Thermo-Fluid Transport Over A Poultry Incubation Period Using High Performance Computing, Melvy Fernandes

Theses and Dissertations

The quality of hatchery conditions significantly impacts the hatchling health. An insight into the spatiotemporal distribution of environmental factors like temperature, ventilation, humidity, and CO2 within an incubator can be the key to reduce the pathogen spread. The objective of this study is to develop an efficient computational fluid dynamics model to predict thermo-fluid and scalar transport over an incubation period using high performance computing systems. Various modeling approaches for grid generation, inflow conditions, fan and heater modeling, and scalar transport are evaluated to identify cost effective numerical models and allow long time simulations with reliable data. The model is …

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Using Phylogenomics And Environmental Metabarcoding To Understand The Distribution And Evolutionary Histories Of Amoebae, Robert E. Jones Aug 2024

Using Phylogenomics And Environmental Metabarcoding To Understand The Distribution And Evolutionary Histories Of Amoebae, Robert E. Jones

Theses and Dissertations

Protists are defined as eukaryotic organisms that are not animals, land plants, or fungi and make up the vast majority of eukaryotic diversity. Unfortunately, they are often overlooked and under sampled. Some rationales behind this are that they are often microscopic, most rarely the cause of human disease, and are often difficult to get into culture. Molecular phylogenetics has revolutionized our understanding of the evolutionary history of eukaryotes and without a clear picture of protist evolution our understanding would be severely hindered. Phylofisher is an easy-to-use phylogenomic software package, with an accompanying database and various utilities, intended for deep phylogenomic …

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Steric Tuning Of Hexadentate Chelates And Their Effects On The Stability And Redox Properties Of First-Row Transition Metals, Ryan Benjamin Gaynor Aug 2024

Steric Tuning Of Hexadentate Chelates And Their Effects On The Stability And Redox Properties Of First-Row Transition Metals, Ryan Benjamin Gaynor

Theses and Dissertations

Chelation of first-row transition metals has many useful properties in the biomedical and industrial fields due to the stabilizing and/or property-altering effects that certain chelates can induce in these metals. One such useful design principle for these chelates is the addition of bulky steric groups which can have an added effect on these properties. Chapter I will explore the origins of these effects and show examples of how these effects are leveraged to produce useful complexes in a variety of applications. In Chapter II, we will discuss our choice of ligand design and the development of related synthetic procedures for …

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Effects Of Cascading Optical Processes On Quantification Of Sample Scattering Extinction, Intensity, And Depolarization, Samadhi Nisansala Nawalage Aug 2024

Effects Of Cascading Optical Processes On Quantification Of Sample Scattering Extinction, Intensity, And Depolarization, Samadhi Nisansala Nawalage

Theses and Dissertations

Complex samples containing nanoscale or larger materials exhibit light scattering, a universal property of matter. However, the influence of scattering-induced cascading optical processes on quantifying sample scattering intensity and depolarization has not been thoroughly evaluated. This study uses polystyrene nanoparticles (PSNPs) as a model analyte for systematic experimental and computational investigation. It aims to elucidate the effects of cascading optical processes on scattering cross-section, molar coefficients, depolarization, and intensities. A theoretical model is introduced to show how the Beer-Lambert law is complicated by forward-scattered light interference in UV-Vis measurements. The dependence of scattering intensity on concentration and particle size is …

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Contention Resolution With Collision Cost, Umesh Chandra Biswas Aug 2024

Contention Resolution With Collision Cost, Umesh Chandra Biswas

Theses and Dissertations

Contention resolution coordinates access to a shared communication channel divided into synchronized slots. For any fixed slot, a packet can be sent, leading to three outcomes: empty (no packet sent), successful (one packet sent), or collision (multiple packets sent). Each slot provides ternary feedback: empty, successful, or collision. Much of the prior work has mainly focused on optimizing the makespan, the number of slots needed for all packets to succeed. However, in many modern systems, collisions also incur time costs, which existing algorithms do not address. In this thesis, we design and analyze a randomized contention-resolution algorithm, Collision-Evasion Backoff, that …

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Unraveling Catalytic Mysteries: Insights Revealed By Density Functional Theory, Tri Nghia Le Aug 2024

Unraveling Catalytic Mysteries: Insights Revealed By Density Functional Theory, Tri Nghia Le

Theses and Dissertations

Density functional theory (DFT), a powerful toolbox, can unveil chemical transformations in detail. This dissertation focuses on exploring catalytic puzzles, deciphering experimental results, and occasionally, reevaluating conventional concepts. In the first problem, a combination of DFT and kinetic studies uncovers the hidden role of borane in directed borylation reactions catalyzed by iridium complex. Borane, initially considered a side product, is revealed to be an autocatalyst. Chiral catalysts are pivotal for achieving asymmetric molecular construction. However, when the chirality center in the catalyst changes with each turnover, what impact does this have? In our second investigation, we delved into a thorough …

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A Random Forest Model For Predicting Soil Properties Using Landsat 9 Bare Soil Images, Ivo Tokeshi Muller Aug 2024

A Random Forest Model For Predicting Soil Properties Using Landsat 9 Bare Soil Images, Ivo Tokeshi Muller

Theses and Dissertations

Digital soil mapping (DSM) provides a cost-effective approach for characterizing the spatial variation in soil properties which contributes to inconsistent productivity. This study utilized Random Forest (RF) models to facilitate DSM of apparent soil electrical conductivity (ECa), estimated cation exchange capacity (CEC), and soil organic matter (SOM) in agricultural fields across the Lower Mississippi Alluvial Valley. The RF models were trained and tested using in situ collected ECa, CEC, and SOM data, paired with a bare soil composite of Landsat 9 imagery. Field data and imagery were collected during the study period of 2019 through 2023. Models ranged from fair …

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Alight, The Dead Of Night: Ascertaining The Collection And Use Of Nighttime Site Inventory In Landscape Architecture Professional Practice, Jacob Zachary Felkins Aug 2024

Alight, The Dead Of Night: Ascertaining The Collection And Use Of Nighttime Site Inventory In Landscape Architecture Professional Practice, Jacob Zachary Felkins

Theses and Dissertations

In landscape architecture, site inventory is a common precursor and perpetual informant of site design, toolkit development, and best management practices. Within inventory-specific texts, inventory is primarily geared, collected, and applied toward the daytime, and thusly, one might consider the bulk of inventory to be “daytime inventory” which pays greater heed to a diurnal humanity and lesser heed to the nocturnal world. With a greater attention to nighttime site conditions, we explored “nighttime inventory” through a series of primary considerations - nighttime lighting, light pollution, site ecology, and the night sky – along with several secondary considerations. We then surveyed …

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Architecture Selection And Propulsion Supervisory Control Strategies For All-Wheel Drive Electric Vehicles (Evs), Jagdeo S. Singh Aug 2024

Architecture Selection And Propulsion Supervisory Control Strategies For All-Wheel Drive Electric Vehicles (Evs), Jagdeo S. Singh

Theses and Dissertations

The automotive industry is shifting towards the development of electric vehicles (EVs) at a rapid pace with most manufacturers intending to be producing solely electric vehicles by 2050. This is due in large part to government regulations aiming to reduce emissions from the transportation sector. As a result, significant research is being conducted to advance the development of EV propulsion technology. This research explores two aspects of EV design: the analysis and selection of an efficient EV propulsion architecture, and the implementation and testing of an efficiency-based energy management strategy (EMS) for implementation on Mississippi State’s EcoCAR team vehicle for …

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Complexities In Datura Production And Ceramics In The Arkansas River Valley, Jaylyn Ashley Gustafson Aug 2024

Complexities In Datura Production And Ceramics In The Arkansas River Valley, Jaylyn Ashley Gustafson

Theses and Dissertations

Plants and ceramics play a crucial role in many Indigenous cultures, used in food preparation and rituals. Datura is a plant found in the Southeast and is known for its medicinal and hallucinogenic properties. The Indigenous cultures that used Datura in their rituals had to develop an understanding of the plant and how to use it. Datura contains specific alkaloids, which are used for medicinal purposes but can be lethal if consumed incorrectly. Being aware of the danger of consuming Datura incorrectly, the Indigenous people had to create a system of extracting the hallucinogenic properties for their ritual and medicinal …

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The Impact Of Stimulus Set Size On Efficiency Of Sight Words Training, Junchen Guo Aug 2024

The Impact Of Stimulus Set Size On Efficiency Of Sight Words Training, Junchen Guo

Theses and Dissertations

Reading skills are widely recognized as fundamental abilities, crucial not only for academic success but also for participation in social activities and navigating interpersonal challenges. In the early formation of reading abilities, mastery of sight words is instrumental in effectively enhancing reading proficiency, particularly for individuals lacking foundational reading skills. In educational practice, flashcard intervention stands as a widely utilized instructional approach. When Kodak et al. (2020) first introduced the concept of stimulus set size and its impact on the efficiency of skill acquisition interventions, they examined differences in training efficiency among children with autism spectrum disorder (ASD) when exposed …

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Boundary Layer Flow Control In Low-Reynolds Numbers Via Internal Acoustic Excitation, Joshua Michael Kiley Aug 2024

Boundary Layer Flow Control In Low-Reynolds Numbers Via Internal Acoustic Excitation, Joshua Michael Kiley

Theses and Dissertations

Aerodynamic flow control using internal acoustic excitation holds promise as it combines the simplicity of passive flow control techniques (in terms of added weight and operational complexity) with the control authority of active flow control methods. While previous studies have analyzed the effects of acoustic excitation on steady wing aerodynamics, the effect of excitation on the unsteady aerodynamics is not known, which is the aim of the current effort. Internally mounted speakers on a symmetric National Advisory Committee for Aeronautics (NACA) 0012 wing are used to excite the unsteady boundary layer at the wing’s leading edge as it executes linear …

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A Graphical User Interface Application For Querying The Unmanned Aerial System Integration Safety And Security Technology Ontology, Matthew Richard Beach Aug 2024

A Graphical User Interface Application For Querying The Unmanned Aerial System Integration Safety And Security Technology Ontology, Matthew Richard Beach

Theses and Dissertations

Unmanned aerial systems (UAS) have become wildly popular over the past decade. With the increased demand of these systems, it is imperative for agencies such as the Federal Aviation Administration (FAA) to integrate rules and regulations of UAS into the National Airspace System (NAS). In 2023, a UAS Integration Safety and Security Technology Ontology (ISSTO) was developed in the Web Ontology Language (OWL) to aid in this integration. To further aid UAS integration into the NAS, it becomes necessary to develop methods for training new pilots, air traffic control operators, drone operators, etc. This paper proposes a query application that …

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