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Evaluating Various Socio-Economic Factors And Their Effect On Tornado Knowledge In Mississippi And Alabama, Jacob E. Dickey
Evaluating Various Socio-Economic Factors And Their Effect On Tornado Knowledge In Mississippi And Alabama, Jacob E. Dickey
Theses and Dissertations
Repeated exposure to tornado events in “Dixie Alley” over the years with often fatal outcomes has led to vibrant discussion in the weather enterprise. Two areas of focus for research are socio-economic factors which increase vulnerability for individuals, and the communication channels used by individuals during tornado events. Understanding what individuals know and how their background and experiences play a role in weather knowledge can help communicators reach at-risk groups more effectively and efficiently not only in the moments that matter, but also when education can play a role in the weeks and months before a potential tornado event. Through …
Response Of Concrete Elements With Varying Compressive Strength To Impact By Fragments With Different Aspect Ratios, Jared L. Brown
Response Of Concrete Elements With Varying Compressive Strength To Impact By Fragments With Different Aspect Ratios, Jared L. Brown
Theses and Dissertations
Concrete is among the most common materials utilized to construct protective elements in hardened structures. Subsequently, understanding how a concrete member will respond to explosively driven fragment or projectile impact is critical to the protective design process. Explosively driven fragments can have many different shapes and sizes depending on the event that resulted in their creation. These geometric variations can include a high-aspect, or width to thickness, ratio; however, impact from fragments with elevated aspect ratios on hardened concrete has not been extensively studied. Therefore, reinforced concrete specimens were subjected to impact from fragments with different aspect ratios to illustrate …
Assessment Of Nutrient Sources At Watershed Scale In Agro-Ecosystem Of Mississippi, Avay Risal
Assessment Of Nutrient Sources At Watershed Scale In Agro-Ecosystem Of Mississippi, Avay Risal
Theses and Dissertations
Excessive nutrient concentrations from a different point and non-point sources are the main cause of water impairment in the United States. Appropriate management practices, according to the source and quantity of pollutions, need to be implemented to control excessive nutrient influx in the water body. Various types of hydrological and water quality models with diverse function, capability and degree of complexity are employed to quantify watershed hydrologic processes and nutrient pollution. Multiple models can be applied to a watershed but the suitable model must be selected based on watershed type and simulation need. Two watershed-scale models, Soil and Water Assessment …
A Study On Biogeography And Floral Trait Evolution In Platanthera Subgenus Limnorchis (Orchie) Using Phylogenomic Approaches, W I W H M Eranga Hansanee Wettewa
A Study On Biogeography And Floral Trait Evolution In Platanthera Subgenus Limnorchis (Orchie) Using Phylogenomic Approaches, W I W H M Eranga Hansanee Wettewa
Theses and Dissertations
Platanthera is one of the largest genera of temperate orchids and exemplifies a lineage that has adaptively radiated into diverse habitats within North America, Asia, Europe, North Africa, Borneo, and Sarawak. Major centers of diversity in this genus are western North America and eastern Asia. The diversity in floral morphological traits such as floral color, shape and the length of nectar spur is associated with numerous pollination syndromes, making Platanthera an ideal system to study the evolution of floral traits and pollination biology. Despite its diversity, a thorough phylogenetic hypothesis for the genus is lacking because no studies have yet …
Thou Shall Not Steal: Assessing Demographic And Neighborhood Predictors Of Shoplifting Through The Lens Of Social Disorganization Theory, Christina Loftin
Thou Shall Not Steal: Assessing Demographic And Neighborhood Predictors Of Shoplifting Through The Lens Of Social Disorganization Theory, Christina Loftin
Theses and Dissertations
The crime of shoplifting has received limited scholarly attention despite millions of shoplifting arrests that occur every year. Our understanding of shoplifting is limited because of this. This study assesses whether offenders arrested for shoplifting that reside in socially disorganized neighborhoods differ from their counterparts from less socially disorganized neighborhoods. Using arrest data from the Meridian Police Department and secondary data from the 2018 American Community Survey, analyses revealed that arrestees from neighborhoods with high levels of poverty were more likely to shoplift from dollar stores, liquor stores, and convenience stores. Demographic findings revealed few gender differences in shoplifting among …
Effects Of Obesity On Cholinergic And Noncholinergic Endpoints Of Organophosphate Toxicity Following Chlorpyrifos Exposure In Standard And High Fat Diet Fed Animals, Sandeep Reddy Kondakala
Effects Of Obesity On Cholinergic And Noncholinergic Endpoints Of Organophosphate Toxicity Following Chlorpyrifos Exposure In Standard And High Fat Diet Fed Animals, Sandeep Reddy Kondakala
Theses and Dissertations
Obesity is a prevalent disease in which, when compared to individuals of normal weight, obese individuals have noted pathophysiological alterations including increased adiposity and fat mass which may alter toxicokinetics of xenobiotics and therefore alter their toxicities. However, the effects of obesity and the altered pathophysiology accompanying this condition on the toxicity of many widely utilized pesticides have not been established. Organophosphate (OP) pesiticides, including chlorpyrifos (CPS), have historically been widely used for agricultural purposes. CPS and several other notable OPs are no longer registered for household use but still used mainly in agriculture by registered users. CPS is bioactivated …
Host And Tissue Tropisms Of Avian Influenza A Viruses, Minhui Guan
Host And Tissue Tropisms Of Avian Influenza A Viruses, Minhui Guan
Theses and Dissertations
Wild birds are the natural reservoirs of Influenza A viruses (IAVs) which cause occasional pandemics and seasonal epidemics. Avian IAVs can be transmitted from wild birds to domestic poultry, low mammals, and humans. It is well accepted that avian IAVs prefer to sialic acids (Sia) α2,3-linked galactose (SAα2,3-Gal), whereas human IAVs to α2,6-linked galactose (SAα2,6-Gal). However, SAα2,3-Gal in wild bird tissues is widely distributed with little variation while some subtypes of avian IAVs have species preference. The different isolation rates among wild bird species cannot be explained by avian IAVs binding to SAα2,3-Gal alone. Specifically, this dissertation had the following …
Investigation On Solar Powered Organic Rankine Cycle With Energy Storage, Economic And Environmental Benefits At Different Climate Zones In Various Buildings Types In The United States Of America, Hadis Hemmati
Theses and Dissertations
This study investigates the potential of installing an integrated solar powered Organic Rankine Cycle (ORC) with electric energy storage (EES) to provide clean energy to commercial buildings in different climate zones in the US. Reducing the primary energy consumption (PEC), lowering the carbon dioxide emissions (CDE) and increasing the operational cost savings are primary objectives. Firstly, a large office building for eight US climates is studied. The EES is sized to store all the electricity generated by the system. Secondly, the system is studied for sixteen different commercial buildings, in the best climate zone, by considering two operational strategies. Finally, …
Latino Suicide: Does Religious Contextual Influence Vary Between Latino Men And Latino Women?, Sierra L. Nelson
Latino Suicide: Does Religious Contextual Influence Vary Between Latino Men And Latino Women?, Sierra L. Nelson
Theses and Dissertations
Researchers have examined aggregate associations between religious contexts and suicide rates among religious denominations. Most early research examined this relationship among white Christians; more current research has examined black Christians. Though this research tradition was established by Emile Durkheim long ago, religious context’s relationship with suicide rates remains understudied among U.S. Latinos. Few studies examine suicide among this group; those that do compare U.S.-born and foreign-born Latinos (see Barranco 2016; Barranco and Harris 2019). Nevertheless, these studies overlook how the religious context—suicide rate relationship differs between U.S. Latino men and women. This study fills this gap by applying two competing …
Learner Perceptions Of Demotivators In The English As A Foreign Language (Efl) Classroom: Conceptual Framework, Scale Development, And Tentative Underlying Cause Analysis, Jianling Xie
Theses and Dissertations
Notwithstanding the negative influence of demotivation on student learning outcomes, prior research in EFL demotivation suffers from the lack of generally agreed-upon conceptual understanding, which hampers scale development. The present series of studies sought to explore the ideas of demotivation and describe the development of the Learner Perception of Demotivators Scale (LPDS) both conceptually and psychometrically. In Study 1 (N = 295), an exploratory factor analysis offered preliminary support for a factor structure comprising three dimensions: negative teacher behavior, loss of task value, and low expectancy for success. In Study 2 (N = 320), the proposed factor structure was further …
Methionine: An Essential Amino Acid And Potential Enhancer Of Antioxidant Systems In Swine Diets, Rebecca M. Humphrey
Methionine: An Essential Amino Acid And Potential Enhancer Of Antioxidant Systems In Swine Diets, Rebecca M. Humphrey
Theses and Dissertations
L-Methionine (L-Met) is a new product that supplies the biologically active form of methionine. Therefore, the objective of this study was to elucidate the benefits of dietary L-Met supplementation relative to the industry standard DL-Met. Sixteen gilts with an initial BW 81.2±7.93 kg were individually penned and randomly allotted to one of two equivalent dietary treatments for 37 days in 2 trials (8 pigs/trial): DL-Met (0.050% of diet) or L-Met (0.052% of diet). Body weight and feed intake were measured on days 0, 19, and 37 to calculate performance measures. Pigs were harvested and carcasses assessed on day 38. Liver, …
Proteomic Analysis Of Outer Membrane Vesicles Of Aeromonas Hydrophila Ml09-119, Jordan Ashley Smink
Proteomic Analysis Of Outer Membrane Vesicles Of Aeromonas Hydrophila Ml09-119, Jordan Ashley Smink
Theses and Dissertations
Aeromonas hydrophila ML09-119 is an important fish pathogen that severely affects channel catfish aquaculture. To better understand this strain’s virulence factors, outer membrane vesicles (OMVs) were isolated, and their proteome was assessed. Using transmission electron microscopy and dynamic light scattering, OMVs were shown to be monodispersed particles with an average diameter of 120.33 nm. OMV proteins were identified using mass spectrometry, and analysis of the resulting proteome of 74 proteins revealed that many originated from the cytoplasm, but there was an enrichment of outer membrane, periplasmic, and extracellular proteins compared to the total proteome. The majority of the functional classifications …
Toward Improved Characterization Of Biologically Relevant Isomeric And Isobaric Ions On Mass Spectrometry-Based Platforms, Baku Acharya
Toward Improved Characterization Of Biologically Relevant Isomeric And Isobaric Ions On Mass Spectrometry-Based Platforms, Baku Acharya
Theses and Dissertations
Mass spectrometry has frequently been employed in the analysis of biologically relevant molecules; however, mass spectrometry alone may not always be sufficient for the differentiation and characterization of isomeric and isobaric ions. In this work, infrared multiple photon dissociation (IRMPD) spectroscopy and ion mobility spectrometry (IMS) were evaluated as complementary techniques for the characterization and separation of isomeric and isobaric ions of biological relevance. In the first project, analysis of experimental IRMPD spectroscopy data shows that this technique is useful in the differentiation of hydroxyproline isomers. Absorption bands allow for the differentiation of three isomeric species: 1640 cm-1 (trans-4-hydroxyproline), 1718 …
Thermographic, Behavioral, And Histological Inflammatory Analysis Of A Subconcussive, Closed-Head, Blunt Impact Rodent Model, Sonja Anne Virkus
Thermographic, Behavioral, And Histological Inflammatory Analysis Of A Subconcussive, Closed-Head, Blunt Impact Rodent Model, Sonja Anne Virkus
Theses and Dissertations
Subconcussive impacts have become a growing concern particularly with respect to contact sports. It is believed that minimal head impacts can cause cerebral perturbations that initiate an immune response creating a window of vulnerability. Evidence suggests that additional head insults sustained during this window of vulnerability elicit an exaggerated inflammatory response and exacerbate cognitive deficits. Therefore, determining the lower limits of systematic perturbation resulting from low-level impacts is of critical importance in expanding our understanding of cerebral vulnerability and recovery. However, the vast majority of experimental investigations of subconcussion fail to model single impact events and instead focus on cumulative …
Mental Health During Emerging Adulthood: The Role Of Differentiation Of Self And Social Comparison Orientation Using Social Media, Kayla Lloyd Wenth
Mental Health During Emerging Adulthood: The Role Of Differentiation Of Self And Social Comparison Orientation Using Social Media, Kayla Lloyd Wenth
Theses and Dissertations
Anxiety is a prevalent health concern for emerging adults and the top concern for those seeking mental health treatment. The purpose of this study was to investigate the features of emerging adulthood (i.e., identity exploration, feelings of optimism about possibilities, instability, selfocus, and feeling in-between), which may be predictive of anxiety symptoms, as well as explore factors (i.e., differentiation of self and social comparison orientation using social media), which may intensify or lessen the anxiety symptoms. The study sample included 598 emerging adults between the ages of 18 and 25. The results of this study suggested that identity exploration, instability, …
Spatial Analysis Of A Chesapeake Bay Sub-Watershed: How Land Use And Precipitation Patterns Impact Water Quality In The James River, Kristina Delia
Spatial Analysis Of A Chesapeake Bay Sub-Watershed: How Land Use And Precipitation Patterns Impact Water Quality In The James River, Kristina Delia
Theses and Dissertations
As land cover throughout the Chesapeake Bay watershed is modified and climate patterns alter, changes in runoff occur which can impact water quality. A study was conducted using the Soil and Water Assessment Tool (SWAT) for the James River watershed in Virginia, the southernmost tributary of the Chesapeake Bay, for 1986 to 2018. A comparison of land cover changes throughout that time frame was included in the analysis. Land cover data was derived from satellite imagery with values extracted using Geographic Information System (GIS) analysis. The SWAT model was run within the web-based Hydrologic and Water Quality System (HAWQS). The …
Examining Body Composition Differences Between Vegetarian And Non-Vegetarian Women, Carlie Mapp
Examining Body Composition Differences Between Vegetarian And Non-Vegetarian Women, Carlie Mapp
Theses and Dissertations
Diet and lifestyle choices play a vital role in the overall health of an individual. There are many types of diets with varying instructions on what kind and how much of a food, or food group, should be eaten. This cross sectional study focused on possible health benefits of a vegetarian diet in regards to the body composition of non-vegetarian and vegetarian women. Total meat, poultry, seafood, and fish (MPSF) intake were separated into three categories to compare low-to-very-low, moderate, and high intake. Anthropometric measurements collected included waist to hip ratio (WHR), weight, height, and percentage of body fat. No …
Residual Strength Of A High-Strength Concrete Subjected To Triaxial Pre-Stress, George Harlan Vankirk
Residual Strength Of A High-Strength Concrete Subjected To Triaxial Pre-Stress, George Harlan Vankirk
Theses and Dissertations
Simplified mechanical loading paths, which represent more complex loading paths observed during penetration, were investigated using a triaxial chamber and a high-strength concrete. Objectives were to determine the effects that stress/strain (load) paths had on the material’s unconfined (UC) residual strength. The loading paths included hydrostatic compression (HC), uniaxial strain in compression (UX), and uniaxial strain load biaxial strain unload (UXBX). The experiments indicate that load paths associated with non-visible microstructural damage were HC and UX, which produced minimal impact on the residual UC strength (<30%), while the load paths associated with visible macro-structural damage were UXBX, which significantly reduced the UC strength (>90%). The simplified loading paths were also investigated using a material model driver code …
Exploring The Relationship Between Genetic Variation In Taste Receptor Genes And Salt Taste Perception Among People With Hypertension, Pradtana Tapanee
Exploring The Relationship Between Genetic Variation In Taste Receptor Genes And Salt Taste Perception Among People With Hypertension, Pradtana Tapanee
Theses and Dissertations
Different taste preferences and genetic variations may lead to particular food patterns that contribute to nutrient-related health outcomes such as hypertension. The objective of this study was to investigate single polymorphism of taste genes and salt taste perception in order to determine whether single nucleotide polymorphisms (SNPs) in the salt taste receptor genes (SCNN1B, TRPV1) affect salt taste perception in hypertensive participants. A cross-sectional study of 253 adults age 20-82 from each group, hypertensive (49%) and normotensive (51%), were enrolled. Salt taste recognition threshold, food preference score, and salt taste receptor genotype were determined. The hypertensive group had a higher …
A Coupled Large Eddy Simulation-Synthetic Turbulence Method For Predicting Jet Noise, Joshua Daniel Blake
A Coupled Large Eddy Simulation-Synthetic Turbulence Method For Predicting Jet Noise, Joshua Daniel Blake
Theses and Dissertations
The noise generated by jet engines represents a significant environmental concern that still needs to be addressed. Accurate and efficient numerical predictions are a key step towards reducing jet noise. The current standard in highidelity prediction of jet noise is large eddy simulation (LES), which resolves the large turbulent scales responsible for the low and medium frequency noise and models the smallest turbulent scales that correspond to the high frequency noise. While LES requires significant computational resources to produce an accurate solution, it fails to resolve the noise in the high frequency range, which cannot be simply ignored. To circumvent …
Detection Rates Of Northern Bobwhite Coveys Using A Small Unmanned Aerial System-Mounted Thermal Camera, Megan Elaine Martin
Detection Rates Of Northern Bobwhite Coveys Using A Small Unmanned Aerial System-Mounted Thermal Camera, Megan Elaine Martin
Theses and Dissertations
Northern bobwhite (Colinus virginianus) monitoring (e.g., covey-call surveys) is labor-intensive and imprecise. We evaluated the influence of bobwhite covey size and cover type on covey detectability when surveyed with a thermal camera-equipped small unmanned aerial system (sUAS). We placed bobwhite groups (3, 6, and 12 individuals/cage) among three cover types (grass, shrub, forest) on a private farm in Clay County, Mississippi (3 replicates, 27 total cages). At civil twilight, the sUAS flew over cages at 30 m, capturing photographs every 5 s. We asked 31 volunteers to evaluate 57 photographs for covey presence. Overall true positive rate was 0.551, but …
An Examination Of Vegetation Ordinances Within Communities Across The Southern United States, Kripa Neupane
An Examination Of Vegetation Ordinances Within Communities Across The Southern United States, Kripa Neupane
Theses and Dissertations
The complexity of urban areas within the mosaic of private and public vegetation has led communities to enact regulations to manage numerous benefits of urban vegetation. As urban populations continue to increase, regulations for governing vegetation becomes increasingly common. This study examined the variation in trends, structure, language, clauses, and provisions of vegetation ordinances within communities across the Southern United States. Qualitative content analysis using NVivo computer software was used for analyzing ordinances collected from Municode. Several discrepancies and similarities were explored in ordinance structure and content, along with problems such as lack of effective ordinance components (enforcement and severability …
Diet Quality And Mental Health In College Students: Impact On Dietary Factors Including Intake Of Protein, Sugar, Vegetable And Omega-3 Fatty Acid On Depression, Yulu Wang
Theses and Dissertations
Depression is one of the most debilitating disorders among youth. Many factors impact depression risk, and dietary quality is one of the most significant modifiable factors. This work was to investigate whether diet quality, including protein, sugar, vegetables, and omega-3 fatty acids’ intake, had any effect on the development of depression. Data from 82 subjects were used for analysis. There was no significant relationship between Dietary Quality Index (p=.21, n=82) and depression based on this research. Results included total protein (p=.77, n=82), animal-based protein (p=.77, n=82), vegetable-based protein (p=.29, n=82), total sugar (p=.55, n=78), added sugar (p=.48, n=78), total vegetable …
Dreams: The Emissary Of Characterization, Ross Alan Rodgers
Dreams: The Emissary Of Characterization, Ross Alan Rodgers
Theses and Dissertations
Dreams hold a particular interest in the minds of literary authors across recorded history. Long looked at as messages of prophecy or visions from the gods, it was not until the 20th century that dreams began to be studied for their psychological impact on the human brain. With an analysis of dream interpretation, the usage of dreams throughout creative fiction give writers the ability to craft characters with a deeper sense of characterization that cannot be otherwise achieved through normal means. With this important tool in hand, this creative thesis uses dreams as a method of characterization while analyzing how …
Controlling Christmas: An Environmental History Of Natural And Artificial Trees, Aaron Thomas
Controlling Christmas: An Environmental History Of Natural And Artificial Trees, Aaron Thomas
Theses and Dissertations
This dissertation argues that from 1880 to 2010 the American natural and artificial Christmas tree industries remodeled themselves after one another. Artificial tree companies modeled their products after the natural tree, hoping to make them look, smell, and feel like the real thing. As these replica trees became popular, scientists, extension agents, and farmers worked to control the natural Christmas tree crop unlike ever before. Those efforts stemmed from a desire to wrest from nature the same kind of idealized silhouettes their plastic counterparts celebrated. Both industries tried to convince the country’s consumers to buy what they were selling. Through …
A Strategy To Reduce Total Cost Of Ownership Of The U.S. Air Force’S Airfield Pavements, Thomas Synovec
A Strategy To Reduce Total Cost Of Ownership Of The U.S. Air Force’S Airfield Pavements, Thomas Synovec
Theses and Dissertations
The U.S. Air Force (USAF) estimates it has a $33 billion (about 10 percent is airfield pavements) deferred maintenance backlog within its $263 billion infrastructure portfolio. Given the scope of this backlog and the importance of airfields, the USAF has a vested interest in finding strategies to help reverse this growing trend. Without an increase in funding, divestiture of excess infrastructure, or change in strategy, this backlog is estimated to climb to over $50 billion by 2030. Reversing the growing infrastructure backlog trend requires new methods and strategies to rethink how the USAF invests in its infrastructure. As such, the …
Advanced Protection Of Microgrids - Challenges, Solutions And Benefits, Yujie Yin
Advanced Protection Of Microgrids - Challenges, Solutions And Benefits, Yujie Yin
Theses and Dissertations
Microgrids form small-scale power grids with distributed energy resources such as wind generators, photovoltaic panels, fuel cells, energy storage systems, and controllable loads. The characteristics of a microgrid include bi-directional power flows, flexible modes of operation, as well as variable short circuit currents. Due to the weak injection of fault current and short period nature, the connection of microgrids to the distribution systems or sub-transmission systems creates serious challenges to existing over-current based protection systems. The protection of microgrids is gaining substantial attentions in recent years because of large-scale deployment of microgrids and its impacts to existing electricity infrastructures. New …
A Comparison Of Strawberry (Fragaria X Ananassa) Cultivars Affected By Different Cultural Practices In Two Production Systems, Geoffrey Thomas Lalk
A Comparison Of Strawberry (Fragaria X Ananassa) Cultivars Affected By Different Cultural Practices In Two Production Systems, Geoffrey Thomas Lalk
Theses and Dissertations
Strawberry cultivar performance affected by various cultural practices was investigated in two production systems. The first study investigated strawberry yield, fruit quality, and production timing of eight cultivars when using black and red plastic mulches in a high tunnel production system. The high tunnel increased air temperatures and advanced strawberry fruiting by four to six weeks compared to local openield production. The second study investigated plant growth, yield, and fruit quality of 10 cultivars fertilized with organic or conventional fertilizer and irrigated once or twice daily with the same total irrigation volume in a container system. Strawberry cultivars varied in …
A Longitudinal Descriptive Study On The Sleep Of Young Adults With Developmental Disabilities, Emily E. Grubbs
A Longitudinal Descriptive Study On The Sleep Of Young Adults With Developmental Disabilities, Emily E. Grubbs
Theses and Dissertations
Sleep is vital for optimal physical and mental health, as well as cognitive and social functioning. Young adults with developmental disabilities (DD) are at greater risk for physical and mental health disorders and experience limitations in cognitive and social functioning in ways that can prevent participation in meaningful activities associated with young adulthood. Sleep literature has reflected that persons with DD experience worse sleep than persons without DD. Suboptimal sleep could compromise functionality and thus participation in young adulthood activities. Not much is known however of the nature of sleep problems experienced by young adults with DD. This study is …
Layer-By-Layer Assembly Of Carbon Nanomaterials Containing Thin Film Nanocomposite Membranes For Water Desalination And Organic Solvent Nanofiltration Applications, Mahsa Abbaszadeh
Theses and Dissertations
The application of membranes in liquid and gas separation is attractive because of their energy efficiency. Synthesis of membranes with well-defined nanostructure is necessary to achieve highly permeability and selectivity for separation processes. Recently, carbon nanomaterials such as graphene oxide nanoplatelets (GONPs) and carbon nanodots (CNDs) have emerged as an interesting class of nanomaterials due to their unique properties and tailorable functionalities. Incorporation of these nanomaterials in the membranes has been shown to improve membrane selectivity, mechanical robustness, and chemical stability. This dissertation elaborates on developing CNDs or GONPs embedded thin film composite (TFC) membranes using layer-by-layer (LbL) synthesis technique. …