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Full-Text Articles in Entire DC Network
Application And Feasibility Of Visible-Nir-Mir Spectroscopy And Classification Techniques For Wetland Soil Identification, Caleb Whatley
Application And Feasibility Of Visible-Nir-Mir Spectroscopy And Classification Techniques For Wetland Soil Identification, Caleb Whatley
Theses and Dissertations
Wetland determinations require the visual identification of anaerobic soil indicators by an expert, which is a complex and subjective task. To eliminate bias, an objective method is needed to identify wetland soil. Currently, no such method exists that is rapid and easily interpretable. This study proposes a method for wetland soil identification using visible through mid-infrared (MIR) spectroscopy and classification algorithms. Wetland and non-wetland soils (n = 440) were collected across Mississippi. Spectra were measured from fresh and dried soil. Support Vector Classification and Random Forest modeling techniques were used to classify spectra with 75%/25% calibration and validation split. POWERSHAP …
Effects Of Moderate Exercise Regimen On Reproductive Development Of Replacement Beef Heifers Reared In Drylots At A High Stocking Density, Logan M. Whipple
Effects Of Moderate Exercise Regimen On Reproductive Development Of Replacement Beef Heifers Reared In Drylots At A High Stocking Density, Logan M. Whipple
Theses and Dissertations
Raising beef females in drylots is gaining popularity because a more intensive management style facilitates adequate feeding for growth. However, drylots increase stocking density which has previously been shown to be stressful and impair reproductive development, whereas exercise has been shown to alleviate stress. Therefore, the objective was to determine if providing access to an exercise area would improve reproductive development of replacement beef heifers reared in drylots. Body weight, pedometer readings, and blood samples for plasma cortisol were collected weekly. Additional blood samples for genes associated with welfare, hair cortisol samples, and heifer temperament was assessed periodically throughout the …
Choosing A Foundational Mathematics Course In Higher Education: How Is The Decision Made?, Heather Marie Wood
Choosing A Foundational Mathematics Course In Higher Education: How Is The Decision Made?, Heather Marie Wood
Theses and Dissertations
This qualitative research used the tenants of phenomenological research to structure a study that begins to identify faculty coordinator’s decision processes in selecting a general education mathematics course. In this study, I examined the question if a faculty member's experiences or beliefs had any influence on the decision process. The interviews occurred with faculty in degree programs grouped by the following a) no specific mathematics requirements (e.g., Humanities) degree programs, b) mathematics-light degree programs (e.g., Social Sciences) and c) mathematics-intensive degrees (e.g., Computer Science). The results of this study are varied but suggest that faculty tasked making decisions on mathematics …
Selective Noise Cancelling Application For Misophonia Treatment, Timothy Wunrow
Selective Noise Cancelling Application For Misophonia Treatment, Timothy Wunrow
Theses and Dissertations
Misophonia is a sensory disorder where specific stimuli, usually auditory, trigger the fight-flight-freeze response, causing extreme reactions, typically anger, panic, or anxiety. Research into treatment for misophonia is limited, primarily consisting of case studies applying common methods of therapy. However, research into similar disorders like tinnitus shows that there are many avenues of treatment that should be investigated, including audiological treatment. To apply audiological treatment to misophonia, selective noise cancelling must be used to control specific trigger sounds. In this research, a basic selective noise cancelling algorithm was developed using a convolutional neural network and was evaluated using a survey. …
Mitre Attack Framework Adaptation In Uav Usage During Surveillance And Reconnaissance Missions, Jeffrey Greer Iv
Mitre Attack Framework Adaptation In Uav Usage During Surveillance And Reconnaissance Missions, Jeffrey Greer Iv
Theses and Dissertations
As unmanned aerial vehicles (UAVs) increasingly become integral to surveillance and reconnaissance (S&R) operations, their susceptibility to cyber threats poses significant risks to operational integrity. The current cybersecurity protocols often fail to address UAV operations’ unique vulnerabilities and challenges in S&R contexts, highlighting a gap in specialized cybersecurity strategies. This research adapts the MITRE ATTACK framework to enhance cybersecurity approaches, safeguarding UAVs against evolving cyber threats. This thesis maps existing vulnerabilities against comprehensive tactics, techniques, and procedures (TTPs) through a scenario-based analysis. Hypothetical and practical S&R operation case studies demonstrate the applicability of proposed cybersecurity strategies, validating their effectiveness in …
Hydrologic Connectivity Between Oxbow Lakes And Rivers Within The Lower Mississippi Alluvial Valley, Hafez Ahmad
Hydrologic Connectivity Between Oxbow Lakes And Rivers Within The Lower Mississippi Alluvial Valley, Hafez Ahmad
Theses and Dissertations
This research investigated hydrologic connectivity, the intricate network of water pathways linking waterbodies, and its implications for biodiversity exchange in floodplains. Chapter 1 provides an exhaustive literature review encompassing factors influencing hydrologic connectivity, assessment approaches, scales, challenges, and management tools. Existing research often focuses on single scales and short-term periods, revealing a need for comprehensive multi-scale and extended temporal analyses. The absence of standardized definitions and methodologies in this field is also considered. Chapter 2 presents an innovative approach quantifying eight key connectivity metrics using remote sensing and GIS within the Lower Mississippi Alluvial Valley (LMAV). This adaptable method assesses …
Determining The Influence Of Broadcast Visuals And Messages On The Public’S Perceptions And Intent To Shelter In Tornado Warnings, Kristina Marie Balentine
Determining The Influence Of Broadcast Visuals And Messages On The Public’S Perceptions And Intent To Shelter In Tornado Warnings, Kristina Marie Balentine
Theses and Dissertations
Tornado warnings are life-threatening situations, and since the public uses television as the main source for tornado warning information, it is important to know how different visuals and messages are influencing the opinions and intentions of people. This research found that participants were more apt to say they would shelter if they were shown a tornado video than a radar video displaying storm-relative velocity or correlation coefficient, while seeing the tornado brought out a heightened level of anxiety and fear. Participants were most influenced by a call-to-action statement spoken by the meteorologist. Participants expressed negative feelings after being asked to …
Common Mode Electromagnetic Interference Attenuation For Dc/Ac Inverters Using Enhanced Sinusoidal Frequency Modulation Technique, Dinh Le
Theses and Dissertations
Common mode (CM) electromagnetic interference (EMI) can compromise electronics systems, interfere with communication systems, and degrade mechanical systems. Multiple inverters can also generate excessive CM EMI that often exceeds individual inverter EMI standards. Due to their weight, volume, cost, and suboptimal performance, active and passive filters and chokes are inefficient as EMI mitigation options. By utilizing frequency modulation (FM) or spread spectrum frequency modulation (SSFM), EMI energy is dispersed. In spite of not requiring expensive, bulky, and heavy filters, these techniques produce significant ripples in output voltages and currents. This dissertation uses enhanced sinusoidal frequency modulation to reduce CM EMI …
Effectiveness Of Omeka Virtual Collections For Engaging Dunn-Seiler Museum’S Middle School Audiences, Amanda Mayo
Effectiveness Of Omeka Virtual Collections For Engaging Dunn-Seiler Museum’S Middle School Audiences, Amanda Mayo
Theses and Dissertations
This study assessed effectiveness of the Dunn-Seiler Museum's Omeka Virtual Platform by comparing student learning after virtual and hands-on informal outreach activities. The research, conducted in two Mississippi middle schools, focused on students’ (N=99) content gains and affective responses when engaging with fossil specimens that illustrate shifts in sea levels in Mississippi’s geological past. Data were categorized into three sections: content, affective response, and drawing portion. This mixed-methods research encompassed scoring student tests, coding student drawings, and identifying stable themes through teacher interviews. Analysis of pre-and post-tests for Control (hands-on) and Experimental (virtual specimens) groups revealed no significant differences in …
The Impact Of Financial Aid Awards On Alabama Community College Student Success, Theresa V. Mays
The Impact Of Financial Aid Awards On Alabama Community College Student Success, Theresa V. Mays
Theses and Dissertations
Financial pressures, encompassing factors such as tuition, fees, books, and work-life balance, consistently substantially influence student success in higher education. Existing research highlights finances' significant role in a student's withdrawal decision. This study aimed to assess the impact of financial aid awards on the retention, persistence, and completion of students enrolled in two community colleges in Alabama, primarily those residing in rural or urban areas. The research focused on the retention and completion outcomes of first-time, full-time students who began their enrollment at two community colleges, UCC and RCC, in the fall of 2017 and received financial aid. Utilizing a …
Deep Learning Based Soil Moisture Retrieval Using Gnss-R Observations From Cygnss, M M Nabi
Deep Learning Based Soil Moisture Retrieval Using Gnss-R Observations From Cygnss, M M Nabi
Theses and Dissertations
The National Aeronautics and Space Administration’s (NASA) Cyclone Global Navigation Satellite System (CYGNSS) mission has grown substantial attention within the land remote sensing community for estimating soil moisture (SM), wind speed, flood extent, and precipitation by using the Global Navigation Satellite System-Reflectometry (GNSS-R) technique. CYGNSS constellation generates important earth surface information called Delay-Doppler Maps (DDMs) from GNSS reflection measurements. Many previous findings considered only designed features from CYGNSS DDMs, such as the peak value of DDMs, whereas the whole DDMs are affected by SM, topography, inundation, and overlying vegetation. This dissertation explores a deep learning approach for estimating SM by …
Tummysafe: The Influence Of Student Engagement And Demographic Variables On Certification Exam Performance In An Online Food Safety Course, Lauren Colby Nickels
Tummysafe: The Influence Of Student Engagement And Demographic Variables On Certification Exam Performance In An Online Food Safety Course, Lauren Colby Nickels
Theses and Dissertations
This study was conducted to see if the engagement variables from the TummySafe 2022 online course as well as the participants’ demographic variables were positively correlated with the TummySafe certification exam score. The study examined factors that explained participants’ exam performance. The results indicated that there was little to no correlation between demographics or engagement variables and the certification exam score. Findings indicated that 22.8% of the overall variance in certification exam performance was explained by number of prior certifications (10%), race (6.5%), gender (3.5%), ethnicity (.2%), days between last course activity and exam (1.7%), in-course assessment (1%), total activity …
Development Of A Framework To Completely Quantify Airfield Pavement Serviceability, Timothy Allen Parsons
Development Of A Framework To Completely Quantify Airfield Pavement Serviceability, Timothy Allen Parsons
Theses and Dissertations
The Federal Aviation Administration proposed a new concept for measuring airport pavement condition that consolidates measures of Foreign Object Damage (FOD), skid resistance, and smoothness into a single number. This research verified that FOD, skid resistance, and smoothness are necessary and sufficient to completely describe airport pavement serviceability and proposed a mathematical framework to reduce these properties to a single number describing the serviceability of the pavement. Serviceability was defined as “meeting the expectations of the user.” An extensive review of standards, regulations, and research indicated these components are each an expectation of the various types of airport pavement user. …
Where’S The Food? Food Insecurity And Black Food Geographies In The Mississippi Delta, Taylor Patterson
Where’S The Food? Food Insecurity And Black Food Geographies In The Mississippi Delta, Taylor Patterson
Theses and Dissertations
This thesis examines the historical and contemporary roots of food apartheid in the Yazoo-Mississippi Delta, while employing a Black Food Geographies approach to highlight and interpret the lived experiences of people in the Delta. This work draws on interviews and participant observation in Clarksdale, Mississippi, to decenter popular narratives around food insecurity and region and instead center the ideas and opinions of people directly impacted. The thesis highlights Black Deltans’ experiences and understandings of food and foodways to provide a nuanced picture of how residents interpret, negotiate, and challenge the region’s unequal food geographies in light of a longer history …
The Transnational Beat: Paramilitary Policing And America’S Associational Defense State, Ryan Reynolds
The Transnational Beat: Paramilitary Policing And America’S Associational Defense State, Ryan Reynolds
Theses and Dissertations
This study addresses the role of Cold War-era American law enforcement and intelligence institutions in shaping U.S. grand strategy and carrying out paramilitary operations. It examines American civil-military relations through the formal and informal relationships between the U.S. military, private organizations, and American law enforcement personnel within a framework I call “associational defense.” The concept provides a framework for observing and comprehending the existence of an American garrison state. While police institutions are civil institutions and not military organizations, law enforcement possessed a paramilitary mission throughout the Cold War and into the War on Drugs and the Global War on …
The Effects Of Cover Crops And Reduced Tillage Practices On Soil Moisture, Cotton Yield, Irrigation Water Use, And Profitability, Carson David Roberts
The Effects Of Cover Crops And Reduced Tillage Practices On Soil Moisture, Cotton Yield, Irrigation Water Use, And Profitability, Carson David Roberts
Theses and Dissertations
Aquifer resources in the mid-southern USA are declining because of irrigation water use in row crops. This study assesses the effectiveness of conservation tillage and cover cropping systems in reducing irrigation water use while improving or maintaining cotton yield and profitability. The effects of different tillage and cover crop cropping systems on soil moisture, irrigation water use, cotton yield, and profitability were investigated near Stoneville, MS on a Dubbs silt loam (fine-silty, mixed, active, thermic Typic Hapludalfs) and a Bosket very fine sandy loam (fine-loamy, mixed, active, thermic Mollic Hapludalfs). Reducing tillage reduced irrigation water use by 3.3 cm ha-1, …
A Tripartite Study On Climate Change, Nitrogen-Sulfur Interactions, And Sulfur’S Role In Mississippi Corn Production, Ramandeep Kumar Sharma
A Tripartite Study On Climate Change, Nitrogen-Sulfur Interactions, And Sulfur’S Role In Mississippi Corn Production, Ramandeep Kumar Sharma
Theses and Dissertations
Three studies were conducted with the objectives as i) to assess the impact of climate change on Mississippi (MS) corn production using 1970 to 2020 datasets, employing autoregressive distributed lag model (ARDL), ii) A narrative review on the role of sulfur (S) in crop production, and iii) to investigate the corn response to multiple rates of nitrogen (N) and S. The first study findings revealed that the maximum temperature and precipitation had a negative effect on MS corn yield while minimum temperature and CO2 emissions posed a positive effect on corn yield. The second review study discussed the need for …
The Performance Of Participation In The Medicare Quality Payment Program, Mary Atkinson-Smith
The Performance Of Participation In The Medicare Quality Payment Program, Mary Atkinson-Smith
Theses and Dissertations
This dissertation aims to explore the performance of health provider participation inthe Medicare Quality Payment Program by investigating the relationship among the performance metrics of value and quality and the capacities of geography, technology, finance, and administration. There is a theory-practice gap in the research that examines the impact of these capacities on the value and quality of clinical services delivered by healthcare providers participating in the Medicare Quality Payment Program. The study will address this theory-practice gap by applying the capacity-performance paradigm to better understand the influences of geographical, technological, financial, and administrative capacity have on the performance of …
An Examination Of Teacher Candidates’ Planning Processes As They Seek To Integrate Technology Into Disciplinary Literacy Instruction, Kimberly O. Smith
An Examination Of Teacher Candidates’ Planning Processes As They Seek To Integrate Technology Into Disciplinary Literacy Instruction, Kimberly O. Smith
Theses and Dissertations
Demands of the workplace and society have made 21st-century knowledge and skills critical elements for success. As a result, the role of teachers in adequately preparing students to meet these demands continues to grow. National and state standards also call for increased attention to multimodal reading and writing. Today’s teachers must have the skills to effectively integrate technology into teaching and learning, supporting student development of digital reading and writing skills. Unfortunately, many teachers do not feel adequately prepared to do this (Hutchison & Reinking, 2011). Teacher education preparation programs must intentionally design programs to prepare teacher candidates for this …
Ultrasonographic Evaluation Of Splenic Nodules And Masses With B-Flow Interrogation Correlates To Cytologic Or Histopathologic Characterization As Benign Or Malignant., William Spigener Stevenson
Ultrasonographic Evaluation Of Splenic Nodules And Masses With B-Flow Interrogation Correlates To Cytologic Or Histopathologic Characterization As Benign Or Malignant., William Spigener Stevenson
Theses and Dissertations
The use of brightness mode (B-mode) ultrasound (US), color Doppler (CD), and power Doppler (PD) can all help evaluate and characterize splenic lesions. A relatively new non-Doppler technology used to evaluate vasculature called B-Flow helps overcome certain limitations of CD and PD that affect visualization of blood flow. There are no studies describing the use of B-Flow characterizing splenic lesions in dogs. A total of 97 splenic lesions were evaluated. Splenic lesions that were larger than 2 cm, distorted the splenic capsule, or accompanied free fluid were significantly associated with malignancy. Lesions with tortuous internal vessels on CD or B-Flow …
Does Attendance In Head Start And Early Head Start Programs Influence Social And Emotional Development In Young Children?, Mary Elizabeth Thorne
Does Attendance In Head Start And Early Head Start Programs Influence Social And Emotional Development In Young Children?, Mary Elizabeth Thorne
Theses and Dissertations
Social and emotional development is a crucial domain of development that influences child outcomes. Apart from a child’s family, early care and education (ECE) programs offer opportunities to develop critical skills that promote academic achievement, emotion regulation, cognition, and literacy. There are achievement gaps in these areas when comparing children from low and high socioeconomic backgrounds, lending to the federal legislation to form Head Start and Early Head Start programs nationwide. While these programs have attendance mandates, the national attendance average is below the requirements, which may hinder the full benefits of Head Start and Early Head Start programs. Using …
Constraints And Challenges For Ensuring Food Security In The Northern And South-Western Region Of Bangladesh: A Policy, Hazards, And Climate Change Perspective, Zia Ahmed
Theses and Dissertations
Achieving food security in Bangladesh remains an arduous task, as the country struggles with several challenges. These challenges include the effects of climate change, occurrence of natural disasters, lack of proper access to credit facilities, and the anthropogenic modification of the agricultural landscape. The vulnerability of agricultural practice in the northern regions to drought, flood, and riverbank erosion, as well as the increased occurrence of coastal surges, waterlogging, cyclones, coastal floods, shrimp aquaculture and soil salinity in the southwestern region, poses a major threat to Bangladesh’s attainment of food security. In this context, we analyze the anthropogenic factors such as …
Developing Non-Invasive Molecular Sampling Methods For Effective Wildlife Monitoring, Daniela Adjaye
Developing Non-Invasive Molecular Sampling Methods For Effective Wildlife Monitoring, Daniela Adjaye
Theses and Dissertations
Monitoring of wildlife populations is critical to conservation and public health and provides crucial information necessary for effective decision-making and management. Effective wildlife monitoring requires effective and adaptable sampling methods that consider the researchers as well as species being monitored. This thesis assesses non-invasive sampling methods to 1) detect cryptic shrew species, and 2) identify bacteria of public health concern present in American black bear (Ursus americanus) fecal matter. Results from Chapter 2 demonstrate the potential for monitoring rare and sparsely distributed small mammals using soil sourced environmental DNA with targeted sampling (e.g., cover objects for shrews). Chapter 3 demonstrates …
Processing And Characterization Of Conjugated Polymers Utilizing Electrospinning Technique For Optoelectronic Applications, Humayun Ahmad
Processing And Characterization Of Conjugated Polymers Utilizing Electrospinning Technique For Optoelectronic Applications, Humayun Ahmad
Theses and Dissertations
The electrospinning technique is an attractive route for processing conjugated polymers (CPs) in a significant quantity for large-scale applications. However, the processing-structure-property relationship of the electrospinning process for CPs is not well understood. This dissertation provides a fundamental understanding regarding the structure development of CPs in electrospun fibers because of different processing conditions and relates that to fiber properties. Electrospinning was conducted for a mixture of polyethylene oxide (PEO) and poly(3-hexylthiophene) (P3HT) of three different molecular weights and two aging conditions: freshly prepared and 24 h aged spinning solutions. The aging of the spinning solution led to the self-assembly of …
The Evaluation Of Italian Ryegrass Control And Rice (Oryza Sativa) Response Using Fall-Applied Residual Herbicides, Taylor D. Burrell Ii
The Evaluation Of Italian Ryegrass Control And Rice (Oryza Sativa) Response Using Fall-Applied Residual Herbicides, Taylor D. Burrell Ii
Theses and Dissertations
Italian ryegrass (Lolium perenne) is one of the most troublesome weeds of rice in Mississippi. Its resistance to multiple modes of action has made it more difficult to control in recent years. The most effective and economical management strategy to control Italian ryegrass is fall-applied residual herbicides; however, the most effective products are not labeled for use in the fall prior to rice seeding. Therefore, research was conducted in Stoneville, MS, to evaluate the effect of fall-applied residual herbicides on rice growth and development. Acetochlor should not be applied in fall targeting Italian ryegrass in fields where rice is scheduled …
Jackson, Mississippi Food Security Efforts: Understanding The Current And Future Foodscape, Natalie Rosemary Bowers
Jackson, Mississippi Food Security Efforts: Understanding The Current And Future Foodscape, Natalie Rosemary Bowers
Theses and Dissertations
In Jackson, Mississippi, basic needs like access to food and water are critical issues. This research reveals efforts and actors working to improve food access within Jackson’s foodscape. This study uses interview and mapping methodologies, which unearth the challenges and opportunities for food efforts in Jackson. Current food work is analyzed through a cultural lens – How is the work influenced by the unique conditions and aspects of Jackson? – and a temporal lens – How does time impact access? What are historic changes and future visions for Jackson? These investigations contribute to opportunities for developing sustainable food systems, determining …
Towards Carbon Dioxide Reduction: Synthesis And Characterization Of Ccc-Nhc Pincer Iron Complexes., Joshua Mensah
Towards Carbon Dioxide Reduction: Synthesis And Characterization Of Ccc-Nhc Pincer Iron Complexes., Joshua Mensah
Theses and Dissertations
The industrial revolution came with its downside of emission of greenhouse gases into the atmosphere. The NOAA reported in 2019 that, of the greenhouse gases emitted into the atmosphere, CO2 contributed to about 80% of the increased greenhouse gases hence the need for CO2 Sequestering and Storage (CSS) and ultimately leading to Carbon Capture and Recycling (CCR) as a viable option to convert CO2 into useful forms. The race to find the best catalyst for CCR has led to the synthesis of many organometallic compounds. Pincer complexes catalyzed CO2 reduction has gained notoriety recently because of the tunability and robustness …
The Impact Of Academic Advising On Persistence In Nontraditional Students Completing A Baccalaureate Degree Online, Kali M. Dunlap
The Impact Of Academic Advising On Persistence In Nontraditional Students Completing A Baccalaureate Degree Online, Kali M. Dunlap
Theses and Dissertations
The increasing enrollment of nontraditional students in online degree programs has underscored the importance of effective academic advising practices. These students, often over the age of 25 and juggling full-time employment and family responsibilities, encounter unique challenges in navigating the asynchronous, online learning environment. Academic advisors play a pivotal role in mitigating these obstacles by fostering trust and delivering comprehensive support systems tailored to the needs of online learners. While previous studies have explored various advising models and approaches in connection with student satisfaction, inadequate attention has been given to assessing the quality of advising specifically tailored to nontraditional, online …
Optimal Multi-Target Navigation In Complex Environments Via Generalized Voronoi Diagram Graph Structures, Brandon Black
Optimal Multi-Target Navigation In Complex Environments Via Generalized Voronoi Diagram Graph Structures, Brandon Black
Theses and Dissertations
With many robots now being developed for indoor settings, an autonomous mobile robot should be capable of reaching multiple targets within a dense, complex environment while maintaining the optimal path taken and avoiding all obstacles. In this thesis, we propose a global path planning algorithm that uses data created from a Generalized Voronoi Diagram (GVD) to traverse complex environments. The global route is made from the skeleton of the diagram that ensures the avoidance of static obstacles. Once this route is determined, dynamic programming is used to determine the optimal route to reach each target location while safely navigating obstacles …
Conservation At The Speed Of Light: Applications Of Non-Invasive Technologies For Assessing Physiological Phenomena In Amphibians, Li-Dunn Chen
Theses and Dissertations
The Anthropocene epoch in which we are currently living, also known as the Holocene, has brought about unprecedented losses in planet Earth’s biodiversity. Numerous extirpations of floral and faunal species have been influenced by human encroachment and more specifically, the exploitation of such species and the respective habitats in which they reside. It is this notion that has propelled many scientists to take up intellectual arms in an effort to protect these invaluable resources. The purpose of this research was to develop technologies to measure and evaluate various variables that influence animal physiology, specifically in amphibians who represent the most …