Digital Commons Network^™

Understanding Dietary And Thermal Influences On Invasive Cichlids In Puerto Rico Reservoir Systems, Jacob A. Moreland

Theses and Dissertations

Jaguar Guapote (Parachromis managuensis) and Amphilophus spp. were assessed for effects of temperature on standard metabolic rate (SMR) and lower dissolved oxygen tolerance (LDOT), efficacy of gastric lavage for diet analysis, and diet in Puerto Rico reservoirs. Fish were acclimated to 22°C, 28°C, and 34°C and SMR and LDOT were measured using intermittent respirometers. Jaguar Guapote acclimated to 34°C had the greatest SMR, with 22°C and 28°C having similar SMR values. Amphilophus spp. acclimated to 28°C were similar to fish acclimated at 22°C and 34°C. Fish were resilient to high temperatures, losing equilibrium more rapidly at the coldest temperature, 22°C. …

Eating German, The American Way: German And American Cooking Traditions, Potato Salad, And The Culinary Assimilation Of German Immigrants, 1820-1920., Scott Wooley

Theses and Dissertations

“Eating German, the American Way” explores how and why the mayonnaise-based potato salad came to be a staple of American culinary tradition. It examines how native-born Americans and German immigrants in the nineteenth century identified themselves based on their culinary traditions and what they ate and how the interactions between, and accessibility of, those traditions created a new identity based on the sharing of recipes as the two groups mingled and assimilated to each other. It uses food as a way to understand the processes of assimilation by defining the distinctions between the two groups based on their separate repertoire …

Protecting The Vulnerable: Tornado Sheltering And Communication Of Public Shelters With A Case Study From The Covid-19 Pandemic, Craig Douglas Croskery

Theses and Dissertations

One of the greatest natural hazards that is faced with in much of the United States are tornadoes. Despite improvements in the warning processes, the risk of significant loss of life remains high. That is particularly true with vulnerable communities which have higher proportions of mobile homes; however, violent tornadoes are very difficult to manage in permanent homes or buildings as well. As a result, tornado shelters have been built in some communities and have become available to the public. However, their presence is intermittent, and there are many tornado-prone areas that lack such shelters.

After a public survey, it …

Evaluating The Relationship Between Methane Seeps And Seafloor Geomorphology On The Northern Us Atlantic Margin, Gabriel Hernandez

Theses and Dissertations

Methane seeps are a transport pathway for carbon from seafloor sediments to the marine environment with important implications for global biogeochemical cycling. Accordingly, there is substantial interest in better understanding the processes that control seep location and predicting the distribution of seeps with existing seafloor datasets. Visual evaluation of methane seeps, in multibeam sonar water column data, suggests a spatial relationship between seeps and specific seafloor morphologic features such as ridge crests. In this thesis, seafloor geomorphology at 1996 seep detection sites on the US Atlantic margin was quantitatively characterized by geomorphologic phonotype, bathymetric position index, slope, rugosity, and aspect …

Cameroonian Immigrant Youths: Perceptions Of Influences On Educational Attainment And Outcomes In American Schools, Marlise De Paul Ngassam

Theses and Dissertations

This qualitative study uses the lens of expectation theory to highlight the educational achievements of Cameroonian youths in American educational institutions as it also examines their individual educational experiences and the many challenges (social, cultural, and academic) that each encountered in his or her journey toward significant educational outcomes. Findings from this study challenge the misconception that students coming into the United States other than from Asia and Europe are academically inferior to their counterparts born in the U.S. Six francophone Cameroonian-born young adults between the ages of 19-30 residing in the Atlanta, Georgia metropolitan area participated in this study. …

Molecular Characterization Of Seminal Plasma From Boars With Divergent Sperm Quality, Notsile Hleliwe Dlamini

Theses and Dissertations

Seminal plasma (SP) is the microenvironment of spermatozoa whose composition reflects semen quality and constitutes an excellent source for detecting non-invasive biomarkers. This study characterizes good vs. poor quality semen using seminal extracellular vesicles coupled proteins and miRNA. Fresh boar semen samples were screened, centrifuged, and SP supernatants were collected for near-infrared spectroscopy (NIRS) analysis. EVs were extracted from SP (SP-EVs), characterized, and those of extremely poor or good sperm quality groups were subjected to proteomics and small RNA sequencing. Significant differences were set for P

Physiological And Yield Responses Of Soybean Cultivars To Heat And Drought Stresses, Sadikshya Poudel

Theses and Dissertations

Soybean (Glycine max L.) is an important legume crop often exposed to heat and drought stresses during reproductive and early-seed setting stages, resulting in lower yields and seed quality. Ten soybean cultivars were phenotyped for individual (drought or heat) and combined stress tolerance. Under drought, reduced stomatal conductance and increased canopy temperature significantly reduced seed number (46%) and weight (35%). Heat stress alone reduced seed number (19%) and weight (23%) compared to control. Moreover, a degree increase in daytime temperature above 32 °C during the reproductive stage reduced seed weight by 4% and 7% under well-watered and drought conditions, respectively. …

Evaluation Of Conservation Practices Effect On Water Quality Using The Swat Model, Vivek Venishetty

Theses and Dissertations

The deterioration of water quality due to human-driven alternations has an adverse effect on the environment. More than 50% of surveyed surface water bodies in the United States (US) are classified as impaired waters as per the Clean Water Act. The pollutants affecting the water quality in the US are classified as point and non-point sources. Pollutant mitigation strategies such as the selective implementation of best management practices (BMPs) based on the severity of the pollution could improve water quality by reducing the amounts of pollutants. Quantifying the efficiency of a specific management practice can be difficult for large watersheds. …

Interspecies Differences In Organophosphate Anticholinesterase Inhibition Potency And Reactivation Using Novel Oximes, Katie Elizabeth Strickland

Theses and Dissertations

Organophosphates are insecticides which result in acute adverse signs when exposed at toxic doses by animals and lead to death if left untreated. The current treatment for organophosphate toxicity includes atropine and the federally approved oxime 2-PAM. However, 2-PAM is not very effective at crossing the blood brain barrier which results in prolonged inactivation of acetylcholinesterase, which is the primary target of organophosphates, in the brain even after administration. The novel oximes, Oxime 15 and Oxime 20, are able to cross the blood brain barrier and reactivate the inhibited acetylcholinesterase. In this experiment with six animal species frequently used in …

Aggregate Characteristics For Unpaved Highway Shoulders, Jessica V. Lewis

Theses and Dissertations

This thesis studied unpaved highway shoulders, and in particular shoulders of lower volume asphalt pavements being overlaid. The primary objective was to better understand how different shoulder aggregates perform on lower volume routes with asphalt surfaces and relatively narrow shoulders. A literature review and an evaluation of a full-scale test section containing five aggregate categories in nine test sections over a thirty-four-month period were the primary efforts performed to evaluate unpaved highway shoulders. The study concluded shoulder width measurements were not especially informative, and that California Bearing Ratio measurements were only modestly informative. Crushed concrete outperformed all other aggregates, though …

Managing Iron Deficiency Chlorosis (Idc) In Soybean Through A Cropping System Approach, Katelin Savannah Waldrep

Theses and Dissertations

Iron deficiency chlorosis (IDC) is a frequent problem throughout many areas of the United States where soils are high in calcium carbonate (CaCO₃), including the Blackland Prairie regions of Mississippi. The main objectives of this study were to 1) determine the effects of seven different cropping systems on IDC visual symptomology and grain yield in rainfed soybeans grown in calcareous soils, and 2) evaluate the effects of soil water tension (SWT) on IDC. Rotating soybeans with corn produced significantly higher yields for both tolerant and susceptible soybean varieties. IDC symptomology was worse, and yields were lower in cropping …

Evaluation Of The Relationship Between Hair Coat Shedding Ability, Apparent Forage Digestibility, And Mineral Status In Angus Cattle, Margaret P. Loftin

Theses and Dissertations

The objective of this study was to evaluate the relationship between hair coat shedding ability, apparent forage digestibility, and mineral status in Angus cattle. Fecal samples were collected on fall calving Angus cows for one week in March, May, and July from 2019-2022. Liver and plasma samples were collected in March and July each year. Fecal samples were analyzed for DM, ash, NDF, and ADF while liver and plasma were analyzed for mineral concentration. Data were analyzed using MIXED procedure of SAS with significance declared at P0.05. Interactions were detected for DM, NDF, ADF, and liver Fe concentration. The model …

A Screening Tool For The Implementation Of Electric And Thermal Energy Storage Systems At Commercial And Industrial Facilities, Mckenna P. Amerson

Theses and Dissertations

The integration of on-site renewable systems with energy storage devices is an important topic in improving energy management for commercial buildings and industrial facilities. Energy storage technologies have the ability to impact the end user’s power reliability while creating measurable energy and cost savings. However, the potential yet remains to increase the application of these systems. To determine the feasibility of renewables and energy storage in commercial and industrial applications, a pre-screening software tool is developed using data-driven algorithms to complete an energy, cost, and carbon savings analysis of storage implementation. A case study of a standalone retail building is …

Two-Essay Based Exploratory Research On Service Robots’ Anthropomorphized Voice Types, Accents, And Speaking Styles, Jutong Wen

Theses and Dissertations

With the rapid development of artificial intelligence, service robots play an increasingly important role in frontline service across various industries. However, many questions surrounding service robots as a novel service option are still less studied, and thus, remain uncertain to marketers. Therefore, this dissertation investigated and addressed some of these questions, by assessing the potential advantages of service robots, not only as compared to human employees, but also among service robots’ different humanlike vocal features, including voice types, accents, and speaking styles. Specifically, to address the research gaps identified through an in-depth literature review conducted in Chapter 2, a series …

Risk Assessments And Modeling Of Driver By Using Risk Potential Theory, Riku Kikuta

Theses and Dissertations

Recently, various self-driving and driving assistance systems such as Advanced Driver Assistance System (ADAS) have been developed with the intent to reduce the number of motor vehicle accidents. While self-driving systems have been proven to reduce traffic accidents, the systems sometimes make other drivers confused because of their mechanical behavior. To avoid confusion and possible error, it is necessary to construct self-driving systems that exhibit human-like behaviors. Risk Potential theory has been used to construct models that successfully represent driver behavior, especially expert behavior. This project uses Risk Potential theory to construct and evaluate a collision avoidance driver model which …

Limits Of Tectonic Reactivation On Mars Using Earth Analogue Analysis And Numerical Modeling, Jonathan Rich

Theses and Dissertations

Recent geodynamic modeling studies suggest that the geometry of structural landforms in the Ouachita Mountains (OM) has been influenced by the reactivation of a weak scar in the mantle-lithosphere during intracontinental orogenesis. As deformation on one-plate planets such as Mars can be considered intracontinental, and impact cratering deeply scarred the Martian lithosphere, we hypothesize that structural geometries on Mars may also reflect heterogenous networks of lithospheric scarring. To investigate this hypothesis, we model the pre-erosional fold structure of the Maumelle Chaotic Zone in the OM to compare fault and fold geometries with that of the seismically-imaged mantle-lithosphere scar. We then …

The Use Of Lidar To Measure Water Surface Elevations In Froude-Scaled Physical Hydraulic Models, Gary L. Bell

Theses and Dissertations

Light detection and ranging (LiDAR) instrumentation is becoming more diverse in our world of today. One challenge in scaled physical hydrodynamic models in a laboratory setting is obtaining high resolution water surface elevation data while maintaining accuracy requirements. Accurate water surface elevations are a primary parameter in hydraulic models as they are a means of controlling/monitoring the physical model’s boundary conditions, analyzing model experiment results, and informing model conclusions. This study focuses on laser scanners that have ranging accuracies of at least +/-10 millimeters (mm) or better for the purpose of attaining LiDAR water surface elevation measurements in scaled physical …

Effects Of Sampling Methodologies On Mycoplasma Gallisepticum Tissue Populations In Commercial Layer Pullets, Sethulakshmi Kattupparayil Sasidharan

Theses and Dissertations

Mycoplasma gallisepticum (MG) can cause chronic respiratory disease in chickens and infectious sinusitis in turkeys. Impacts of MG infections can include increased morbidity and mortality, decreased egg production, hatchability and feed efficiency. Biosecurity and bio-surveillance remain the primary means of deterrence as the current means of control are not wholly effective. Further applications towards the characterization of MG-related disease control requires proper understanding of the characteristics of MG infections with accurate and efficient quantification of in vivo MG populations. To this end, study was conducted to determine the in vivo MG populations in infected pullets and to determine impact of …

Endeavors Of Large Family Firms: A Property Rights Perspective Of Internationalization, Vitaliy Skorodziyevskiy

Theses and Dissertations

A large number of firms around the world are family firms. Many of these family firms are involved in internationalization strategies. Despite the breadth of knowledge on the internationalization of large family firms, not enough attention has been paid to some of the aspects of internationalization. Specifically, the literature is scarce with respect to understanding the mechanisms that may help or harm family firms in their internationalization strategies and the impact of these strategies on firm performance. In my dissertation, I use property rights theory to argue that family firms are able to minimize their negotiating and policing costs, allowing …

Lateral Swelling Pressure In Variably Saturated Expansive Clay, Steven Ray Garrett

Theses and Dissertations

Lateral swelling pressure induced in expansive soils upon wetting can adversely impact the performance and integrity of earthen structures and foundations. The yearly cost associated with damage to structures from expansive clays in the United States is estimated to exceed the loss associated with natural disasters such as earthquakes, floods, and hurricanes. The main objective of this dissertation is to provide new insight into the evolution of lateral swelling pressure in variably saturated expensive soils under infiltration via physical testing. In the first part of this study, a new laboratory-scale testing apparatus was built to measure lateral and vertical swelling …

Impact Of Daily Sweet Potato Ingestion On Alterations To The Gut Microbiome, Cholesterol, And Exercise Performance, Johneric William Smith

Theses and Dissertations

The importance of the gut microbiome is being explored in relation to multiple facets of health and performance. The purpose of this study was to explore the impact of frequent sweet potato ingestion on alterations of the gut microbiome which might in turn alter cholesterol levels and exercise performance. Thirteen recreationally trained males had fecal and blood samples collected and exercised to fatigue with and without exogenous carbohydrate ingestion prior to and following 42 days of daily sweet potato ingestion. Bacterial communities were extracted from fecal samples and bacterial DNA were sequence. Blood samples were analyzed for total cholesterol, low-density …

The Silent Grave: A Geophysical Investigation Of The Brush Arbor Cemetery In Starkville, Mississippi, Kathryn Cassidy Jean Rayburn

Theses and Dissertations

The Brush Arbor Cemetery is an early-to-late 19th century Black cemetery that was also the meeting place of one of the first Black church congregations in Starkville, Mississippi. The cemetery has suffered greatly from structural violence and degradation. Utilizing Ground Penetrating Radar (GPR), this research has revealed important information about the Brush Arbor Cemetery. The results of the GPR survey suggest there are 54 potential unmarked burials in addition to 35 marked burials. The Viewshed analysis suggests that the likely meeting place of the church congregation is in complete view of the white Odd Fellows Cemetery directly across the street. …

Evaluation Of Nutrient Digestibility Of Weaned Calves From Early And Late Shedding Dams, Jennifer Keele

Theses and Dissertations

Researchers have investigated several factors that could alter fetal growth, including nutrient restriction (Valiente et al., 2021), hair shedding (Gray et al., 2011), and extreme hot and cold temperatures (Davidson et al., 2022). Hot temperatures and increased humidity percentages in the southeast United States caused researchers to investigate the hair coats of Angus cattle in the commercial production setting. An improvement in fiber digestibility and calf birth and weaning weights has been observed in Angus dams that shed 50% of the winter hair coat by May (Gray et al., 2011; Burnett et al., 2021). Our objective of this experiment was …

Pruning Ghsom To Create An Explainable Intrusion Detection System, Thomas Michael Kirby

Theses and Dissertations

Intrusion Detection Systems (IDS) that provide high detection rates but are black boxes lead
to models that make predictions a security analyst cannot understand. Self-Organizing Maps
(SOMs) have been used to predict intrusion to a network, while also explaining predictions through
visualization and identifying significant features. However, they have not been able to compete with
the detection rates of black box models. Growing Hierarchical Self-Organizing Maps (GHSOMs)
have been used to obtain high detection rates on the NSL-KDD and CIC-IDS-2017 network traffic
datasets, but they neglect creating explanations or visualizations, which results in another black
box model.
This paper offers …

The Ties That Blend: Social Capital And Family Firm Innovation, Dustin L. Odom

Theses and Dissertations

The research project empirically assesses the influence of an under-researched aspect of social capital on the family firm’s entrepreneurial behaviors. Specifically, blending social capital, which consists of bonding social capital and bridging social capital that develops between family firms and external family stakeholders, is considered in examining the family firm’s engagement in innovation efforts. Additionally, familial tie strength and outside business ownership of external family stakeholders are argued to moderate the proposed relationship between blending social capital and family firm innovation. The surveying methods for assessing the hypothesized relationships included conducting a two-wave study with adapted, modified, and validated scales. …

Verification Of The Localized Aviation Mos Program (Lamp) At Major Us Airports For Ifr Conditions, Mackenzie O'Rourke

Theses and Dissertations

The objective of this research is to quantify the LAMP’s performance when forecasting for IFR conditions at specific major airports for forecast hours one, three, six, and twelve, and further determine how the LAMP performs seasonally at those specific airports and forecast hours. Two by two contingency tables were used to calculate the Probability of Detection (POD), False Alarm Ratio (FAR), Critical Success Index (CSI), Heidke Skill Score (HSS), and Bias score. The results show that the LAMP performs relatively better in the cool season compared to the warm season consistently at each chosen airport, and that the LAMP performs …

Novice Teacher Perceptions Of Induction Supports Provided During The First Year, Keri James Tawater

Theses and Dissertations

This descriptive case study examined the perceptions of 6 beginning teachers regarding the supports offered to them during their 1st year of teaching. Based on purposeful and convenience sampling through administrative recommendations, the participants included 4 middle school 6th, 7th, and 8th grade teachers in their 2nd year of teaching. I collected data from documents and multiple interviews to understand the needs of beginning teachers and how to best support them. Utilizing the social cognitive learning framework, I analyzed the results in terms of which supports provided vicarious reinforcements, self-reinforcements, and ultimately self-efficacy. These perceptions and understandings were then compared …

Genome-Wide Association Study For Agronomic Traits In Bermudagrass (Cynodon Spp.), Lovepreet Singh

Theses and Dissertations

Bermudagrass (Cynodon spp.) breeding and cultivar development is hampered by limited information regarding its genetic and phenotypic diversity. A germplasm collection of 206 bermudagrass accessions from 29 countries was genotyped with high-throughput genotyping-by-sequencing technique. Genomic diversity in this diverse germplasm panel was assessed with multifaceted approaches including population structure, phylogenetic analysis, principal component analysis, and genetic diversity parameters. This study revealed substantial genetic variation in the Cynodon accessions, demonstrating the potential of this germplasm panel for further genetic studies and cultivar development in breeding programs. Another critical issue in turfgrass breeding is the lack of information regarding the genetic …

Evaluation Of Early Maturing Cultivars, Optimal Harvest Timing, And Canopy Reflectance Of Peanut To Maximize Grade And Yield, Joseph Bryan Whittenton

Theses and Dissertations

Peanut digging timing is difficult to predict due to indeterminate growth and peanut pods maturing underground, resulting in the need to research methods that provide consistent measurements, while reducing time and effort for farmers and researchers. Experiments were conducted to evaluate the accuracy of the Maturity Index 1 and Maturity Index 2 in predicting peanut grade, the accuracy of the North Carolina 2 degree day method in predicting peanut yield, and remote sensing vegetative indices sensitivity equivalence (SEq) to peanut Maturity Index 2 and harvest grade (TSMK) for cultivars IPG-914 and Georgia-06G in Mississippi.

Maturity Index 1 and …

An Electric Commerce Platform For Material Testing Laboratories, John Ferris Mitchener

Theses and Dissertations

The emergence of the Internet has allowed businesses to create new sales and marketing channels to provide value for their customers in the marketplace. Engineering manufacturers and suppliers have taken advantage of the internet to automate the customer service aspects of their businesses as well as to market their services in a cost-effective but widespread manner. This work aims to apply the practices and benefits of electronic commerce (e-commerce) to a material testing laboratory through the creation of a functioning website with e-commerce features. The effects of Search Engine Optimization, website accessibility issues, marketing considerations, security concerns, and common business …