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Phenotypic And Transcriptomic Characterization Of Rice Snrk1 Mutants Developed By Crispr/Cas9 Mutagenesis, Maria Clara Faria Chaves
Phenotypic And Transcriptomic Characterization Of Rice Snrk1 Mutants Developed By Crispr/Cas9 Mutagenesis, Maria Clara Faria Chaves
Graduate Theses and Dissertations
SnRK1 is a heterotrimeric protein kinase that is composed of a catalytic subunit (α) and two regulatory subunits (β and βγ), and it has a main role in regulating energy homeostasis in the plant by modulating anabolic and catabolic process. SnRK1 phosphorylates and alters the activities of enzymes involved in metabolism and regulates gene expression by altering the activity of chromatin-remodeling enzymes or the transcription factors. Rice contains three functional paralogs of SnRK1α: SnRK1αa (LOC_Os03g17980), SnRK1αb (LOC_Os08g37800), and SnRK1αc (LOC_Os05g45420). This study focused on the function of these SnRK1 paralogs by evaluating the phenotypic and transcriptomic characteristics and the disease …
Hedda Is All Of Us. On Directing Henrik Ibsen’S Hedda Gabler, Laura Catherine Post
Hedda Is All Of Us. On Directing Henrik Ibsen’S Hedda Gabler, Laura Catherine Post
Graduate Theses and Dissertations
This paper aims to document the process of directing Henrik Ibsen’s 1890 play Hedda Gabler at the University of Arkansas in February 2023. The chapters include the script selection process, translation selection process, casting, text analysis, research, design process, rehearsal process, and production evaluation.
Her Story Told Her Way: A Narrative Inquiry Into Black Women’S Perception Of The Strong Black Woman., Chulyndria Chanee Laye
Her Story Told Her Way: A Narrative Inquiry Into Black Women’S Perception Of The Strong Black Woman., Chulyndria Chanee Laye
Graduate Theses and Dissertations
The narrative surrounding the meaning of being a Black woman has historically been dominated by stereotypes such as the mammy, jezebel, sapphire, and angry Black woman. Black women have attempted to control their own narrative through the internalization of these stereotypes, leading to the creation of the Strong Black Woman (SBW) construct. While the SBW is comprised of a sense of caretaker, independence, and emotional restraint, Black women’s attempts at embodying this construct in the face of societal oppression and familial responsibilities can and often does have negative effects on their mental health. Although the behaviors associated with the SBW …
Treating High Salinity Produced Water Using Hybrid Membrane Processes: Electrocoagulation-Microfiltration/Ultrafiltration-Membrane Distillation-Crystallization, Mahmood Gheni Jebur
Treating High Salinity Produced Water Using Hybrid Membrane Processes: Electrocoagulation-Microfiltration/Ultrafiltration-Membrane Distillation-Crystallization, Mahmood Gheni Jebur
Graduate Theses and Dissertations
Produced water (PW) is considered the largest industrial wastewater stream in the world. PW generated from oil and gas operations generally contains a range of contaminants including high total dissolved solids, high total suspended solids, polar and nonpolar organic compounds, and low surface tension dissolved species. Treating PW is very challenging and applying only membrane-based technologies is not sufficient due to membrane fouling, which affects their long-term performance. Hence, integrated membrane processes are required to treat PW effectively. Hybrid membrane processes, which may result from combining a conventional process with a membrane separation, could be used to address the issues …
Explicit And Implicit Measurements Of Sensory And Emotional Responses To Stimuli In Children With Autism Spectrum Disorder, Asmita Singh
Explicit And Implicit Measurements Of Sensory And Emotional Responses To Stimuli In Children With Autism Spectrum Disorder, Asmita Singh
Graduate Theses and Dissertations
Autism Spectrum Disorder (ASD) is a developmental disability that causes significant social, communication, and behavioral challenges and it is often involved in sensory processing issues that lead to feeding problems. While our understanding of how sensory responses differ in people with ASD is limited, past studies indicated atypical responses to certain stimuli. If these stimuli can be identified, they could be good indicators to identify the risk of autism in young children. The main objective of this dissertation was to identify a specific stimulus leading autistic children to exhibit atypical responses in terms of sensory or emotional aspects. Children between …
A Comparison Of Intelligent Agent Technology And Traditional Preference Assessment Implementation Methods For Preservice Speech-Language Pathologists, Brenna R. Griffen
A Comparison Of Intelligent Agent Technology And Traditional Preference Assessment Implementation Methods For Preservice Speech-Language Pathologists, Brenna R. Griffen
Graduate Theses and Dissertations
Identifying preferred stimuli is an initial step in many evidence-based educational programs for young children. Preference assessments, such as the Multiple Stimulus Without Replacement (MSWO), provide an empirically validated way of identifying and ranking these stimuli. Traditional methods of training professionals to implement MSWO often require the presence of an expert trainer, involve lengthy instructional time, require additional training to transfer skills into the clinical or classroom setting, and necessitate follow-up training to maintain skills over time. Intelligent agent technology may overcome these challenges by providing professionals with easily accessible, consistent instruction. The purpose of the current study was to …
Fabrication And Measurement Of Lt-Gaas Photoconductive Antennas And Arrays, Zachary Paul Uttley
Fabrication And Measurement Of Lt-Gaas Photoconductive Antennas And Arrays, Zachary Paul Uttley
Graduate Theses and Dissertations
This thesis presents the fabrication and measurement of LT-GaAs based terahertz (THz) photo conductive antennas (PCAs) and arrays. The LT-GaAs THz PCAs are fabricated to serve as reference devices to new 2D material black phosphorous (BP) based THz PCAs. The LT-GaAs and BP devices have identical metallic electrodes, allowing for a comparison of emitted THz intensity and bandwidth. All PCAs have been measured using an open bench pulsed time-domain spectroscopy (TDS) system with a usable bandwidth from 0.1-4 THz, pumped with a 780nm Ti:Sapphire femtosecond laser. The results have shown LT-GaAs devices outperforming BP devices in signal amplitude and bandwidth …
Short-Term Response In Soil Health To Management Practices Within Large- And Small-Scale Cropping Systems In Arkansas, Torri Holder
Short-Term Response In Soil Health To Management Practices Within Large- And Small-Scale Cropping Systems In Arkansas, Torri Holder
Graduate Theses and Dissertations
Improving soil health is a growing area of interest within large- and small-scale agricultural systems in Arkansas as producers face increasing input costs, increased awareness of variability and intensity in extreme weather events, decreasing resource availability, and suboptimal productivity related to environmental degradation. Practices aimed at improving soil health such as cover cropping and the use of organic amendments are increasingly recommended and adopted; however, research on optimal management in the Mid-South is lacking. Two studies were conducted to evaluate the effectiveness of soil health management under both small- and large-scale farming operations in Arkansas. The objective of the small-scale …
The Effect Of Carbohydrate Source As Part Of A High Protein, Weight-Maintenance Diet On Outcomes Of Well-Being In Adults At Risk For Metabolic Syndrome, Mariya Hayat
Graduate Theses and Dissertations
Obesity is a growing epidemic affecting at least 312 million people worldwide and is a major risk factor for chronic diseases such as metabolic syndrome (MetS). MetS is defined based on the National Cholesterol Education Program Adult Treatment Panel III, as having 3 or more of the following: waist circumference greater than 102 cm in men or greater than 88 cm in women; serum level of triglycerides of 150 mg/dL or greater; high-density lipoprotein (HDL) cholesterol level of less than 40 mg/dL in men or less than 50 mg/dL in women; systolic/diastolic blood pressure of 130/85 mmHg or greater or …
Rice Material State Diagrams: Trends Of Contemporary Cultivars And Influence Of Nitrogen Application During Production, Evans Ameyaw Owusu
Rice Material State Diagrams: Trends Of Contemporary Cultivars And Influence Of Nitrogen Application During Production, Evans Ameyaw Owusu
Graduate Theses and Dissertations
Rice is typically harvested at high moisture content (MC) levels which necessitates drying to low MC levels for safe storage. However, drying at inappropriate temperatures and durations can lead to deterioration of kernel quality such as fissure formation. Kernels with these fissures are typically associated with reduced head rice yields and significant economic losses. Material state diagrams for rice have been created by the University of Arkansas Rice Processing Program (UARPP) as a tool to aid in predicting the ideal temperatures to use during drying and tempering (a process of holding rice at the drying temperature for some duration). The …
The Influence Of Climate And Landscape On Allocapnia Mohri Distribution In Arkansas, Brianna Leigh Annaratone
The Influence Of Climate And Landscape On Allocapnia Mohri Distribution In Arkansas, Brianna Leigh Annaratone
Graduate Theses and Dissertations
Stoneflies are a globally threatened aquatic insect order. In Arkansas, a diverse group of winter stonefly (Capniidae: Allocapnia) have not been surveyed since the 1980s, likely because species-level identification requires the rarely-collected adult form. Allocapnia mohri, a regional endemic, was previously commonly found in mountainous, intermittent streams from the Ouachita Mountains ecoregion north to the Ozark Highlands, but no species distributional models including land use or climate variables exist to our knowledge. We collected adults from 70 stream reaches from the historic Arkansas range from November to April 2020 and 2021. We modeled distributions using random forest (RF) models populated …
Nutrient Responses To Hippuric Acid In Sheep Urine Applied To Pasture Soil Cores, Ethan Avery Collins
Nutrient Responses To Hippuric Acid In Sheep Urine Applied To Pasture Soil Cores, Ethan Avery Collins
Graduate Theses and Dissertations
Hippuric acid is a breakdown product of tannins, which bind with proteins in the animal rumen and slow down protein metabolism, thus increasing nitrogen (N) retention in the animal. Increased hippuric acid concentration in bovine and ovine urine applied to soil may decrease rates of nitrification, denitrification, and nitrous oxide fluxes in pasture soils. Additionally, condensed tannins have increased rates of carbon mineralization when incorporated in humus and leaf litter. To evaluate effects of hippuric acid concentration, treatments of urine from sheep fed a tannin-supplemented diet, synthetic urine, or urea controls were applied to intact soil cores seeded with crabgrass …
Investigation Of The Flow Field In The Jack Rabbit Ii Mock Urban Environment Field Tests Using A 1:50 Scale Wind Tunnel Model, Paulo Victor De Freitas Lopes
Investigation Of The Flow Field In The Jack Rabbit Ii Mock Urban Environment Field Tests Using A 1:50 Scale Wind Tunnel Model, Paulo Victor De Freitas Lopes
Graduate Theses and Dissertations
Accidental release of toxic chemicals can put workers and nearby populations at significant risk. Consequence assessment of accidents in urban environments is of particular interest. Urban geometries create wind channels between buildings, along with particularly dangerous areas downwind of buildings, where near-stagnant flow is present. Furthermore, recirculation zones can be formed between buildings, trapping high concentrations of toxic gases at ground level, particularly for denser-than-air gases. In 2015, the Department of Homeland Security conducted the Jack Rabbit II Field Test (JR-II) at Dugway Proving Ground, UT. During JR-II, chlorine was released at the center of a Mock Urban Environment (MUE) …
Investigation Of Chinese Students’ Writing Perceptions At An English Young Writers Camp, Jingshu Chen
Investigation Of Chinese Students’ Writing Perceptions At An English Young Writers Camp, Jingshu Chen
Graduate Theses and Dissertations
This study explores how a young writers camp that catered to 40 Chinese English as a Foreign Language (EFL) learners, ranging from students entering the fourth grade to seventh grade, mediated the students’ writing perceptions. More specifically, the main objective of this research was to investigate the impact of the camp on the students' perceptions of writing and their self-identification as writers. The study employed the theoretical framework of Cultural Historical Activity Theory to guide the analysis. Various types of data were collected from the 40 participating students, including pre- and post-camp survey questions, classroom observations, and open-ended interviews. By …
Holocaust Education In Arkansas: An Exploration Of Policy Process And Implementation, Toby Klein
Holocaust Education In Arkansas: An Exploration Of Policy Process And Implementation, Toby Klein
Graduate Theses and Dissertations
The Holocaust was the attempted extermination of the Jewish people--a fact previously considered to be common knowledge. However, recent national surveys find that Arkansas students have the lowest levels of knowledge of the Holocaust in the United States. A recent law mandated the teaching of the Holocaust for 5-12th grade public school students in Arkansas, however, little is known about the policy process and implementation of such a mandate. Given the magnitude of the gaps in the literature on this topic, this dissertation uses a three article format to address specific gaps and make specific contributions to the literature by …
Photon Counting Statistics Of Classical And Quantum Light Sources, Luis Felipe Morales Bultron
Photon Counting Statistics Of Classical And Quantum Light Sources, Luis Felipe Morales Bultron
Graduate Theses and Dissertations
Multiple sources of light, including coherent light, thermal light, light from a degenerate parametric oscillation and resonance fluorescence from a two level coherently driven atom are considered for the analysis of their wait time statistics. We include the second order normalized correlation function and Mandel's Q parameter for brief discussion. A general framework to analyze the generalized conditional and unconditional wait time distributions is also obtained in order to understand the photo-count statistics of the light sources included in this work. Average and variance of wait times with respect to both unconditional and conditional wait time distribution are also obtained …
Circuitry And Semiconductor Studies For Making A Graphene Energy Harvesting Device, Ferdinand Harerimana
Circuitry And Semiconductor Studies For Making A Graphene Energy Harvesting Device, Ferdinand Harerimana
Graduate Theses and Dissertations
Freestanding graphene has constantly moving ripples. Due to its extreme flexibility, graphene responds to ambient vibrations and changes its curvature from concave to convex and vice versa. During a ripple inversion 10,000 atoms move together, suggesting the presence of kinetic energy which can be harvested. In this study we present circuitry and semiconductor studies for harvesting energy from graphene vibrations. The goal of the study is to develop a graphene energy harvesting chip which can serve as a battery replacement in low power electronics. In the first study we determined the best circuit for harvesting vibrational low power. To do …
The Effect Of Herbal Adaptogen On Feeding-Related Hypothalamic Neuropeptides In Heat-Stressed Broilers, Maryam Afkhami Ardakani
The Effect Of Herbal Adaptogen On Feeding-Related Hypothalamic Neuropeptides In Heat-Stressed Broilers, Maryam Afkhami Ardakani
Graduate Theses and Dissertations
Heat stress is a major issue in the poultry industry, having numerous negative consequences for chicken productivity. Decreasing feed intake is one of these issues, which results in higher mortality and poor growth performance. Moreover, Herbal adaptogens, plant extracts that are also known as stress response modifiers, are metabolic regulators that improve an organism's ability to adapt to environmental stresses and minimize damage from such stressors. Previously, we published data indicating that herbal adaptogen supplementation increased feed intake under heat stress conditions. Therefore, we hypothesized that dietary herbal adaptogen supplementation might exert these effects through alteration of the expression of …
Electrochemically Precipitated Struvite Effects On Soil Property And Crop Response, Tatum Simms
Electrochemically Precipitated Struvite Effects On Soil Property And Crop Response, Tatum Simms
Graduate Theses and Dissertations
Phosphorus (P) is a vital resource that is finite and only mineable in raw-material form in a few countries worldwide. Struvite (MgNH4PO4·6H2O) is a mineral that can be produced from wastewater that may provide a promising alternative source of fertilizer-P for crop production, but comprehensive characterizations of struvite behavior in various soils and responses of various crops are necessary. This study aimed to determine the (1) leaching potential, (2) vertical soil profile-P distribution, (3) wheat (Triticum aestivum), corn (Zea mays), and soybean (Glycine max) response, and (4) soil property changes over time of electrochemically precipitated struvite (ECST) compared to that …
Achieving High Renewable Energy Integration In Smart Grids With Machine Learning, Yaze Li
Achieving High Renewable Energy Integration In Smart Grids With Machine Learning, Yaze Li
Graduate Theses and Dissertations
The integration of high levels of renewable energy into smart grids is crucial for achieving a sustainable and efficient energy infrastructure. However, this integration presents significant technical and operational challenges due to the intermittent nature and inherent uncertainty of renewable energy sources (RES). Therefore, the energy storage system (ESS) has always been bound to renewable energy, and its charge and discharge control has become an important part of the integration. The addition of RES and ESS comes with their complex control, communication, and monitor capabilities, which also makes the grid more vulnerable to attacks, brings new challenges to the cybersecurity. …
The Multiverse Argument For The Existence Of God, Michael Dover
The Multiverse Argument For The Existence Of God, Michael Dover
Graduate Theses and Dissertations
The Fine-Tuning Argument for the Existence of God is one of the most powerful arguments in favor of God’s existence. Perhaps the most common objection to this argument involves the Multiverse Theory, which posits an infinite or very large multiverse, adequately explaining the fine-tuning of the universe without positing an intelligent designer. Thus, the Multiverse Theory is often posited as a way of maintaining Atheism. In this paper, I argue that the Atheistic Multiverse View is untenable: if the multiverse exists, God or gods are highly likely to exist as well. Additionally, this paper explores topics like: the conceivability of …
Towards Multi-Modal Explainable Video Understanding, Kashu Yamazaki
Towards Multi-Modal Explainable Video Understanding, Kashu Yamazaki
Graduate Theses and Dissertations
This thesis presents a novel approach to video understanding by emulating human perceptual processes and creating an explainable and coherent storytelling representation of video content. Central to this approach is the development of a Visual-Linguistic (VL) feature for an interpretable video representation and the creation of a Transformer-in-Transformer (TinT) decoder for modeling intra- and inter-event coherence in a video. Drawing inspiration from the way humans comprehend scenes by breaking them down into visual and non-visual components, the proposed VL feature models a scene through three distinct modalities. These include: (i) a global visual environment, providing a broad contextual understanding of …
Essays Examining Humanitarian Supply Chains: Investigating Operational Characteristics, Activities, And Performance, Llord Brooks
Essays Examining Humanitarian Supply Chains: Investigating Operational Characteristics, Activities, And Performance, Llord Brooks
Graduate Theses and Dissertations
As the frequency and severity of disasters continue to increase, the need for collaboration amongst all humanitarian stakeholders in humanitarian supply chain activities during all aspects of the disaster cycle has become more critical to the success of relief operations. Humanitarian non-governmental organizations (NGOs) are voluntary organizations operating in highly dynamic and chaotic environments to provide aid to people in need. But as the impact of disaster increases and the funding becomes more limited and competitive, they face mounting pressures from stakeholders to improve the quality of their operations. Similarly, private organizations are also under higher levels of scrutiny to …
Anti-Inflammatory Effect Of Apiaceous Vegetables In A Mouse Model Of Colitis - Implications For Colon Cancer Risk, Laura Mariana Mariana Echavarri Ibarra
Anti-Inflammatory Effect Of Apiaceous Vegetables In A Mouse Model Of Colitis - Implications For Colon Cancer Risk, Laura Mariana Mariana Echavarri Ibarra
Graduate Theses and Dissertations
Colorectal cancer is the second leading cause of cancer-related deaths in the US. Dietary habits account for 50% of the cases. A westernized diet (high fat, high sugar/fructose, and low in fruits and vegetables) and inflammatory bowel diseases are risk factors for colorectal cancer. Evidence suggests phytochemicals in apiaceous vegetables (API; celery family) possess anti-inflammatory and potentially chemopreventive properties. Hence, investigation of whether the consumption of API mitigates acute colitis is warranted. Using mice fed the Total Western Diet (TWD) and administered dextran sodium sulfate (DSS; induces colitis), the objectives of this project are to identify the effects of API …
Use Of X-Ray Imaging To Elucidate Impacts Of Drying Approach On Rice Seed Health, Samuel Olayiwola Olaoni
Use Of X-Ray Imaging To Elucidate Impacts Of Drying Approach On Rice Seed Health, Samuel Olayiwola Olaoni
Graduate Theses and Dissertations
Improper drying, which causes fissuring of rice kernels, may influence the overall seed health. This study evaluated the impacts of various drying conditions on rice fissures, seed germination and vigor. A long – grain rice cultivar with a moisture content (MC) of 15.5% w.b. (wet basis) was used during the experiments. Samples were dried as thin layers at temperatures of 30 ℃, 40 ℃ and 50 ℃ with a constant relative humidity (RH) of 50% and air velocities (AV) of 0.66 m/s and 1.65 m/s. X – ray imaging was used for fissure detection before and after drying the samples …
Partial Discharge Mitigation In Power Modules Using An Automation-Driven Design Rule Development Method, Shilpi Mukherjee
Partial Discharge Mitigation In Power Modules Using An Automation-Driven Design Rule Development Method, Shilpi Mukherjee
Graduate Theses and Dissertations
Power modules used for the conversion and conditioning of electrical power for applications like electric vehicles, more-electric aircraft, the power grid, etc., are largely designed manually by engineers. Design automation of power modules is starting to gain recognition as a timely and necessary alternative to intuitive manual design and fabrication. With increasing need for wide bandgap materials that can operate at higher voltages, and the need to make modules more compact, hazards like electrical breakdown are more likely. Partial discharge (PD) is a silent and invisible precursor to electrical breakdown. It is compounded with compaction, creating a potential for electrical …
Generating Health-Promoting Bioactive Compounds And Nanoporous Materials From Rice Processing Byproducts Via Supercritical Carbon Dioxide Technology, Sumanjot Kaur
Graduate Theses and Dissertations
Rice husk and bran, byproducts of rice processing, are generated in large quantities (~30-40% of the total rice weight) and are discarded as waste or burned in an open field, creating a major disposal problem for the rice industry. However, these byproducts contain high-value compounds, including phytochemicals, fiber, and proteins. Therefore, the goal of this study was to generate high-value food ingredients from rice processing byproducts using a green, innovative approach based on supercritical carbon dioxide (SC-CO2) technology. Specific objectives were to (i) extract health-promoting phytochemicals from rice husk and (ii) convert rice bran into nanoporous materials using SC-CO2. First, …
Radiofrequency And Gaseous Technologies For Enhancing The Microbiological Safety Of Low Moisture Food Ingredients, Surabhi Wason
Radiofrequency And Gaseous Technologies For Enhancing The Microbiological Safety Of Low Moisture Food Ingredients, Surabhi Wason
Graduate Theses and Dissertations
High heat resistance and long survival of Salmonella in low moisture food ingredients (LMFIs) such as spices and seeds are concerning as they are typically consumed without cooking. Therefore, it is challenging to effectively inactivate pathogenic bacteria without negatively impacting the quality of the treated product. This dissertation aimed to develop and evaluate novel intervention technologies: in-package radiofrequency steaming and non-thermal gaseous technologies to improve the microbial safety of LMFIs. The dissertation can be divided into three parts. The first part of this dissertation on the thermal inactivation kinetics of Salmonella and a surrogate, Enterococcus faecium NRRL B-2354on black pepper …
A Real-Time Anpc Inverter Digital Twin With Integrated Design-For-Trust, Paulo Vitor Do Amaral Custodio
A Real-Time Anpc Inverter Digital Twin With Integrated Design-For-Trust, Paulo Vitor Do Amaral Custodio
Graduate Theses and Dissertations
The demand for renewable energy has increased over the last few years, and so has the demand for greater expectations within the energy market. This increasing trend has been accompanied by more significant usage of internet-connected devices (IoT), leading to critical electrical infrastructure being connected to the internet. Implementing internet connectivity with such devices and systems provides benefits such as improving the system's performance, facilitating irregularity and anomaly mitigation, and providing additional situational awareness for enhanced decision-making. However, enhancing the connected system with IoT introduces a drawback – a greater vulnerability to cyber-attacks. Cyber-attacks targeting critical infrastructure in the electrical …
Method Development For Quantifying Micropollutants In Water At Trace Levels With Diffusive Gradients In Thin-Films Passive Samplers, Michael Bradford Howland
Method Development For Quantifying Micropollutants In Water At Trace Levels With Diffusive Gradients In Thin-Films Passive Samplers, Michael Bradford Howland
Graduate Theses and Dissertations
The United States (US) Environmental Protection Agency (EPA) issued a proposed National Primary Drinking Water Regulation in March 2023 for six per- and polyfluoroalkyl substances (PFAS), which included maximum contaminant levels (MCLs) of 4.0 ng•L−1 for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). These MCLs were based on current method detection limits (MDLs) for aqueous-phase grab samples achievable at certified analytical labs throughout the US. In June 2022, the US EPA issued the interim lifetime health advisory levels for PFOA and PFOS of 0.004 ng•L−1 and 0.02 ng•L−1, respectively, which presently cannot be reliably quantified using existing PFAS methods. …