Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Machine learning (8)
- Gender (5)
- Channel catfish (4)
- Depression (4)
- Ecology (4)
-
- Prescribed fire (4)
- Soybean (4)
- White-tailed deer (4)
- Adolescents (3)
- Biochar (3)
- Cotton (3)
- Cover crops (3)
- Diet (3)
- Erosion (3)
- Fatigue (3)
- Geographic Information Systems (3)
- Mississippi (3)
- Movement ecology (3)
- Peanut (3)
- Protection (3)
- School Psychology (3)
- Sleep (3)
- Temperature (3)
- Virtual reality (3)
- Absorption (2)
- Additive manufacturing (2)
- Aging (2)
- Airfield (2)
- Amino acid (2)
- Analysis (2)
- Publication
Articles 331 - 356 of 356
Full-Text Articles in Entire DC Network
Inheritance, Sam Kealhofer
Inheritance, Sam Kealhofer
Theses and Dissertations
In this thesis, I observe the methods modern American poets employ to achieve literary activism in their work. Poets Amiee Nezhukumatathil, Marcus Wicker, and Tracy K. Smith all examine and critique different aspects of American life and culture. Ultimately, I argue that each poet, in their own way, develops a voice that deftly straddles between the personal and public. By doing so, the poets invigorate their work with an authenticity that is crucial in developing an ethos vivacious enough to create a call to action for readers. I will also discuss how I create a similar balance of the personal …
Evaluation Of Coatings Used For Prolonging The Durability Of Cross-Laminated Timber Against Weathering And Wood Decay Fungi, Gabrielly S Bobadilha
Evaluation Of Coatings Used For Prolonging The Durability Of Cross-Laminated Timber Against Weathering And Wood Decay Fungi, Gabrielly S Bobadilha
Theses and Dissertations
The aim of this study was to assess the durability of commercially available coatings on cross- laminated timber (CLT) during natural and artificial weathering and against wood decay fungus. The CLT samples coated with twelve coatings were tested based on their moisture exclusion, water repellency, volumetric swelling and anti-swelling efficiency. Among all the tested coatings, only five (A, C, F, I and J) were able to promote water repellency and limiting dimensional changes. The top five coatings were then tested on CLT blocks exposed to natural (Starkville-MS and Madison-WI) and artificial weathering conditions and brown-rot fungi (G. trabeum). Variables such …
Assessment Of Social Media Technical Support Efforts For Extension Agents, Mary Annabelle Stokes
Assessment Of Social Media Technical Support Efforts For Extension Agents, Mary Annabelle Stokes
Theses and Dissertations
Extension agents are tasked with disseminating educational content, announcing events, and promoting the outreach efforts of Extension. Social media can be a powerful resource for Extension agents (Skrabut, 2014). Integrating social media into outreach efforts can be an efficient way for agents to meet increasing work demands (Gharis & Hightower, 2017). Still, many Extension agents are not fully integrating social media as a means to communicate with their audiences (Garcia et al., 2018). To address this, Extension communication units are developing social media technical support efforts to increase the agents’ social media activity (Garcia et al., 2018, Newbury et al., …
Biophysical Characterization Of Protein-Nanoparticle Interactions, Yasiru Randika Perera
Biophysical Characterization Of Protein-Nanoparticle Interactions, Yasiru Randika Perera
Theses and Dissertations
Nanoparticles (NPs) have become a key tool in medicine and biotechnology; as drug delivery systems, biosensors, and diagnostic devices. However, the mechanism of biocorona formation on nanoparticle surfaces and their impact on drug delivery remains speculative. Nevertheless, functionalized nanoparticles have demonstrated major success in medical applications; having been shown to effectively treat disease. The mechanistic details of protein behavior on nanoparticle surfaces remain poorly understood to date; due to difficulty in determining the orientation and structure of protein on NPs. Furthermore, surface crowding, orientation, and degree of disorder have been shown to perturb the efficacy of protein on NPs; dramatically …
Interpreting Time-Resolved Spectra And Excited State Reactivity With Computational Methods, Robert Lamb
Interpreting Time-Resolved Spectra And Excited State Reactivity With Computational Methods, Robert Lamb
Theses and Dissertations
Light-harvesting compounds are developed for a variety of purposes pertaining to areas such as energy-capture, chemical transformations, and lighting. There is a need to better understand the reactivity and excited state properties of these compounds. Many experiments focus on gleaning information about reactivity by observing spectral changes over time intervals ranging from femtoseconds to minutes (IR, UV-VIS, and UV-VIS pump-probe spectroscopy). This dissertation focuses on the interpretation of the experimental data from a computational perspective and methodological studies to determine reasonable levels of theory for each system. Three vignettes of this approach will be discussed. First, a mononuclear tungsten complex …
Effects Of The Trematode Bolbophorus Damnificus On Channel And Hybrid Catfish, Mackenzie Gunn
Effects Of The Trematode Bolbophorus Damnificus On Channel And Hybrid Catfish, Mackenzie Gunn
Theses and Dissertations
The trematode Bolbophorus damnificus (Digenea: Bolbophoridae) has deleterious effects on production efficiency of farm-raised catfish. The effects of B. damnificus on channel and hybrid catfish, as well as the prevalence and longevity of the trematode stages impacting production, are not well understood. This study aimed to understand the prevalence of infected snails, determine the longevity and site specificity of B. damnificus cercaria in catfish, and compare mortality and physiological response between channel and hybrid catfish during infection. The infectivity and survival of B. damnificus cercariae declined significantly at 12h intervals from 12-36h, and subsequent trials were standardized using cercariae <12h old. Metacercariae persisted in both fish types for 13 months and were found commonly in the posterior midsection. Hybrid catfish exhibited lower mortality than channel catfish. Exposed catfish exhibited anemia corresponding to parasite encapsulation, however no difference was found between fish types in physiological response during infection and subsequent recovery.
Electrochemical Studies Of External Forcing Of Periodic Oscillating Systems And Fabrication Of Coupled Microelectrode Array Sensors, David Clark
Theses and Dissertations
This dissertation describes the electrochemical behavior of nickel and iron that was studied in different acid solutions via linear sweep voltammetry, cyclic voltammetry, and potentiostatic measurements over a range of temperatures at specific potential ranges. The presented work displays novel experiments where a nickel electrode was heated locally with an inductive heating system, and a platinum (Pt) electrode was used to change the proton concentration at iron and nickel electrode surfaces to control the periodic oscillations (frequency and amplitude) produced and to gain a greater understanding of the systems (kinetics), oscillatory processes, and corrosion processes. Temperature pulse voltammetry, linear sweep …
Estimating The Load Rating Of Reinforced Concrete Bridges Without Plans, Edgardo Ruiz
Estimating The Load Rating Of Reinforced Concrete Bridges Without Plans, Edgardo Ruiz
Theses and Dissertations
There are over 250,000 reinforced concrete bridges in the U.S. many of which do not have a load rating on record nor the plans required to perform the calculations. The U.S. Army owns and maintains hundreds of these bridges throughout the U.S. This dissertation describes the development of multiple regression models to estimate the load rating of reinforced concrete bridges. An exploratory data analysis of the 2017 NBI data was performed for the selection of a representative data sample. The data was found to have multiple errors and required significant processing in order to extract a reliable sample for modeling. …
Evaluation Of Defoliating Caterpillar Pests In Mississippi Peanut, Brittany Lipsey
Evaluation Of Defoliating Caterpillar Pests In Mississippi Peanut, Brittany Lipsey
Theses and Dissertations
Peanut, Arachis hypogaea (L.), provides good rotational benefits for subsequent crops. During 2017, 2018, and 2019, research was conducted to determine the defoliating caterpillar complex in peanut in Mississippi, create a sweep net threshold for the complex, and determine yield losses associated with defoliation. The complex is comprised of yellow-striped armyworm, Spodoptera ornithogalli (Guenée); soybean looper, Chrysodeixis includens (Walker); corn earworm, Helicoverpa zea (Boddie); fall armyworm, S. frugiperda (Coquillet); southern armyworm, S. eridania (Stoll); beet armyworm, S. exigua (Hübner); green cloverworm, Hypena scabra (Fabricius); velvetbean caterpillar, Anticarsia gemmatalis (Hübner); and granulate cutworm, Feltia subterranea (F.). There was a significant relationship …
Uranium Solubility In High Temperature, Reduced Systems, Noah Van Hartesveldt
Uranium Solubility In High Temperature, Reduced Systems, Noah Van Hartesveldt
Theses and Dissertations
The traditional paradigm declares tetravalent uranium to be immobile under reducing conditions – an assumption widely employed for nuclear waste management strategies. In contrast, experiments presented here demonstrate this assumption, although valid for low temperatures, can be erroneous for high temperature natural systems. This project focuses on the ability of sulfate-bearing solutions to transport uranium at reduced conditions and elevated temperatures, identifies the new species U(OH)2SO4, derives thermodynamic constants necessary for modeling, and expands the quantifiable range of U4+ mobility to more neutral pH conditions. The data obtained enable more accurate assessment of uranium mobility by updating the existing uranium …
Research Investigation Into The Ventura River Watershed: Geoliteracy, Stormwater, And Community Activity, Julia A. Domenech
Research Investigation Into The Ventura River Watershed: Geoliteracy, Stormwater, And Community Activity, Julia A. Domenech
Theses and Dissertations
Presently, scientific communities are confronting Earth’s foremost environmental issues using best management practices. However, an increase for need in the synthesis of socio-ecological principles using a multi- and trans-disciplinary approach is required for solutions that benefit both nature and humans. To examine whether a community perceives stormwater runoff as both a local resource and threat to coastal water quality, an online survey of the Ventura River watershed community probed local residents’ understanding of watershed knowledge, beliefs, and behavior with regards to their local environment as it pertained to water resources, especially as affected by human activity. Analysis of 144 participants’ …
Validation Of Finite Element Couple Level-Set Volume Of Fluid Method For Plunging Breaking Wave Prediction, Graham Hubbard
Validation Of Finite Element Couple Level-Set Volume Of Fluid Method For Plunging Breaking Wave Prediction, Graham Hubbard
Theses and Dissertations
Predictive capability of computational fluid dynamics simulations for the prediction of plunging breaking wave is assessed. Laminar flow simulations are performed for dam break, solitary wave run up on a slope and flow over a submerged bump using OpenFOAM, a finite volume solver with volume-ofluid (VoF) interface capturing method, and Proteus, a finite element solver with coupled level-set/ volume-ofluid (CLSVoF) methods. CLSVoF predicts wave elevation before the plunge, and primary and secondary plunger shapes better than VoF in all the cases. The primary limitation in the simulation is the airflow, which results in diffused plunger tips in VoF simulations, and …
Exporting Reconstruction: Civilization, Citizenship, And Republicanism During The Grant Administration, 1869-1877, Ryan Patrick Semmes
Exporting Reconstruction: Civilization, Citizenship, And Republicanism During The Grant Administration, 1869-1877, Ryan Patrick Semmes
Theses and Dissertations
This dissertation examines Ulysses S. Grant’s Reconstruction policy, both the domestic and foreign policies, as an integrated whole. He focused on the broad application of citizenship rights, not only for African Americans in the South, but for all peoples in the United States’ sphere of influence. The centerpiece of Grant’s Reconstruction policy was the “Grant Doctrine,” articulated in his 1869 memorandum considering whether to annex the Dominican Republic to the United States. In it, Grant delineated his determination to export the republican policies of Reconstruction to the Caribbean by the acquisition of the island territory. Grant envisioned exporting the ideals …
First Principles Modeling Of Deoxygenation Chemistry On Bi-Metallic Phosphides And Zeolites Nanosheets, Varsha Jain
First Principles Modeling Of Deoxygenation Chemistry On Bi-Metallic Phosphides And Zeolites Nanosheets, Varsha Jain
Theses and Dissertations
With the dwindling availability of petroleum, focus has shifted to renewable energy sources such as lignocellulosic biomass. Cellulose and hemicellulose are highly utilized components of biomass, and on the other hand, lignin is a plentiful, under-utilized component of the lignocellulosic biomass. Hence, utilization of the lignin component is necessary for the realization of an economically sustainable biorefinery model. Once depolymerized, lignin has the potential to replace petroleum-derived molecules. Further, a catalyst is capable of selectively removing the oxygen atoms without hydrogenating the aromatic components would be valuable. Bimetallic phosphides and zeolites are capable of selectively cleaving CAROMATIC–O bonds from aromatic …
Forage Contribution Of Cool-Season Annuals As Cover Crops In Warm-Season Pastures, Abiola Elizabeth Bruce-Smith
Forage Contribution Of Cool-Season Annuals As Cover Crops In Warm-Season Pastures, Abiola Elizabeth Bruce-Smith
Theses and Dissertations
Cover crops (CC) can contribute to production in pastures, but the diversity of CC mixtures and defoliation frequency (DF) may alter productivity. A 2-yr experiment conducted at Raymond, MS, quantified CC × DF effects on forage mass (FM) and nutritive value of winter CC and subsequent summer hay production. Treatments were factorial combinations of 10 CC (using several species of grasses, legumes, and brassicas) and three DF (harvested every 4 or 8-wk or cut and left as mulch) in a split-plot arrangement of a randomized complete block design experiment with three replications. Generally, mixtures with legumes had greater FM and …
A Machine Learning Framework For Prediction Of Diagnostic Trouble Codes In Automobiles, Mohan Kopuru
A Machine Learning Framework For Prediction Of Diagnostic Trouble Codes In Automobiles, Mohan Kopuru
Theses and Dissertations
Predictive Maintenance is an important solution to the rising maintenance costs in the industries. With the advent of intelligent computer and availability of data, predictive maintenance is seen as a solution to predict and prevent the occurrence of the faults in the different types of machines. This thesis provides a detailed methodology to predict the occurrence of critical Diagnostic Trouble codes that are observed in a vehicle in order to take necessary maintenance actions before occurrence of the fault in automobiles using Convolutional Neural Network architecture.
Anomaly Detection And Classification Of Sparse Gamma-Ray Spectra Using Machine Learning Algorithms For Depleted Uranium Remediation, Austin Finney
Anomaly Detection And Classification Of Sparse Gamma-Ray Spectra Using Machine Learning Algorithms For Depleted Uranium Remediation, Austin Finney
Theses and Dissertations
The quality of the spectral data collected by radiological survey systems depends on many factors including the survey environment, configuration of the system and its detectors, and the radionuclides in question. Algorithms in the field of machine learning have the potential to classify data that would be difficult and time-intensive for a human to analyze. Depleted and natural uranium spectra are of particular interest due to known contamination at domestic sites and world-wide. Several machine learning classifiers were developed with data collected from laboratory experiments. This thesis demonstrates the potential of machine learning algorithms to discriminate gamma-ray emitting sources using …
Assessing The Environmental And Educational Value Of An Agricultural Watershed Restoration Project In Mississippi, Audrey K. Mccrary
Assessing The Environmental And Educational Value Of An Agricultural Watershed Restoration Project In Mississippi, Audrey K. Mccrary
Theses and Dissertations
With a majority of land in the United States being utilized for agricultural production, water resource conservation has become a significant topic of interest for natural resource agencies. In partnership with the Mississippi Department of Environmental Quality and Natural Resources Conservation Service, Mississippi State University conducted a stream restoration project within its agricultural research properties in Oktibbeha County, Mississippi. Water sampling during storm-runoff events was conducted to assess changes in microbial, nutrient, and sediment concentrations and loads pre- and post-restoration. In addition to these water monitoring activities, a regional survey of Cooperative Extension Service agents with agriculture and natural resource …
Career Paths, Responsibilities, Barriers, And Affirmations Of Exemplary Female Elementary School Principals, Stacie Collins
Career Paths, Responsibilities, Barriers, And Affirmations Of Exemplary Female Elementary School Principals, Stacie Collins
Theses and Dissertations
The purpose of the study was to explore the lived experiences of exemplary female elementary principals. The qualitative phenomenological study investigated the career paths, job responsibilities, barriers/challenges, and affirmations of exemplary female principals practicing in elementary schools in the United States. The participants were required to have at least 5 years of experience in education and at least 3 years as an elementary school principal. Interviews were conducted by the researcher to acquire explanations about the participants’ perceptions, perspectives, and feelings based on their experiences as exemplary elementary principals. The investigation focused on the females’ career paths, job responsibilities, barriers/challenges, …
Cultural Competence Development Of Undergraduate Students In A Multidisciplinary Teaching Methods Course, Candy Grant
Cultural Competence Development Of Undergraduate Students In A Multidisciplinary Teaching Methods Course, Candy Grant
Theses and Dissertations
While empirical research abounds for ways to develop cultural competence, studies are scarce in how to track its growth in students. This study utilized a non-equivalent control group design to propose tracking growth using cultural competence mini lessons, self-assessment of cultural competency, and the Global Perspectives Inventory (GPI; Research Institute for Studies in Education, 2017). Data collected were used to align students along the levels of Cross’s Cultural Competency Continuum (; Cross, 2012). Forty-one (41) students enrolled in a multidisciplinary teaching methods course served as the study participants. Paired samples t-tests were conducted using the Statistical Package for the Social …
Defining The Mechanical Characteristics Of Porcine Brain Tissue Subject To Cyclic, Compressive Loading, Kali Sebastian
Defining The Mechanical Characteristics Of Porcine Brain Tissue Subject To Cyclic, Compressive Loading, Kali Sebastian
Theses and Dissertations
In recent years, repetitive traumatic brain injuries have been linked to the progressive neurodegenerative disorder termed chronic traumatic encephalopathy. However, the mechanical characteristics of brain tissue exposed to repetitive loading still lack understanding. This research evaluated the response of porcine brain tissue undergoing cyclic, compressive loading in reference to three impact parameters: cycle number (N25, N50, N100, N150, and N200), strain level (15, 30, and 40%), and strain rate (0.00625, 0.025, 0.10, and 1.0/s). Following mechanical testing, tissue samples were processed for hematoxylin and eosin (H&E) staining. Stress values, hysteresis energy, and decreases in hysteresis energy for all parameters were …
Biodiversity Of Bariditae (Coleoptera: Curculionidae: Conoderinae) In Mississippi, Ryan Whitehouse
Biodiversity Of Bariditae (Coleoptera: Curculionidae: Conoderinae) In Mississippi, Ryan Whitehouse
Theses and Dissertations
A survey of Bariditae in Mississippi resulted in records of 75 species in 32 genera and included two undescribed species and 36 new state records. An additional two species were recognized as possibly occurring in Mississippi as well. Diagnoses for all of the genera and species in the state are provided and keys to the genera as well as all of the species were made. Species were found in every county within Mississippi and are representative of the Bariditae fauna of the southeastern United States. Open, prairie-like habitats and aquatic wetland habitats were the habitats with the highest biodiversity of …
Glacier Change Assessment Of The Columbia Icefield In The Canadian Rocky Mountains, Canada (1985 – 2018), Adjoa Dwamena Intsiful
Glacier Change Assessment Of The Columbia Icefield In The Canadian Rocky Mountains, Canada (1985 – 2018), Adjoa Dwamena Intsiful
Theses and Dissertations
Glaciers adjust their sizes as a response to changing climatic conditions which make them a good indicator of climate change. Remote-sensing based glacier monitoring provides a robust way to inventory the health of glaciers and are estimated as a measure of changes in their area, length, volume and mass balance over a period. This research uses remote sensing methods to map glacier extents from satellite images and explores the efficacy of three machine learning algorithms for accurate glacier classification. The results indicated that the Columbia icefield lost 42 km2 of its area cover between 1985 and 2018. It was observed …
Impact Of Context Switching And Focal Distance Switching On Human Performance In All Augmented Reality System, Mohammed Safayet Arefin
Impact Of Context Switching And Focal Distance Switching On Human Performance In All Augmented Reality System, Mohammed Safayet Arefin
Theses and Dissertations
Most current augmented reality (AR) displays present content at a fixed focal demand. At the same time, real-world stimuli can occur at a variety of focal distances. To integrate information, users need to switch eye focus between virtual and real-world information continuously. Previously, Gabbard, Mehra, and Swan (2018) examined these issues, using a text-based visual search task on a monocular AR display. This thesis replicated and extended the previous experiment by including a new experimental variable stereopsis (stereo, mono) and fully crossing the variables of context switching and focal distance switching, using AR haploscope. The results from the monocular condition …
Impact Of Shoe Design On Basketball Performance And The Application Of Soft Sensors To Improve Dynamic Fit., Anthony Lee Luczak
Impact Of Shoe Design On Basketball Performance And The Application Of Soft Sensors To Improve Dynamic Fit., Anthony Lee Luczak
Theses and Dissertations
This dissertation is composed of four different studies focused on using Human Factors Engineering (HFE) assessment tools traditionally used in industrial settings to evaluate personal protective equipment (PPE) footwear of basketball athletes and assessment of compressible soft robotic sensors to evaluate pressures. The first study developed a Basketball Shoe Taxonomy (BST) designed to categorize shoes using a combination of design factors and effects on performance. The second study investigated the influence of basketball shoe design on jumping performance. Using four jumping patterns, six male and ten female basketball National Collegiate Athletic Association (NCAA) Division I student-athletes completed 16 trials wearing …
Improved Recall For Information Reread On Tests Provides Support For The Test Question Effect, Kevin Barnes
Improved Recall For Information Reread On Tests Provides Support For The Test Question Effect, Kevin Barnes
Theses and Dissertations
Repeated testing produces superior recall (especially at a delay) compared to rereading, a phenomenon known as the testing effect. Three studies present evidence for a test question effect that benefits recall of information participants encounter when reading a test. After reading a two-page passage, participants either reread the passage or took fill-in-the-blank practice tests that contained additional information that was later tested. The same procedure was used for a different two-page prose passage as well. A large and unexpected benefit for information read on practice tests was observed. On the 48-hour delayed final test, recall of information reread on practice …