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Articles 8131 - 8160 of 35655
Full-Text Articles in Entire DC Network
A Mechanistic Study Of The Teratogenic Potential Of 4-O-Methylhonokiol (Mh) On Japanese Medaka (Oryzias Latipes), Santu Kumar Singha
A Mechanistic Study Of The Teratogenic Potential Of 4-O-Methylhonokiol (Mh) On Japanese Medaka (Oryzias Latipes), Santu Kumar Singha
Electronic Theses and Dissertations
An additional goal of this project was to characterize the Wnt/β-catenin signaling pathway to unravel the adverse potential of MH on the cardiovascular system (CVS). Our study suggested that MH-mediated cardiovascular injury may be caused due to upregulation of some major components of the Wnt/β-catenin pathway through expression of excessive pro-inflammatory mediators. Moreover MH decreased expression of ErbB3 and NRG-2 suggesting impaired cardiac structure. MH exposure caused a slow heartbeat blood occlusion absence of blood circulation decreased hatching efficiency and increased mortality in medaka embryos in a concentration- and time-dependent manner. MH might cause blood vessel occlusion by increasing the …
Electro- And Photocatalytic Carbon Dioxide Reduction And Thermal Isomerization Of Highly Strained Tricyclocompounds, Weiwei Yang
Electro- And Photocatalytic Carbon Dioxide Reduction And Thermal Isomerization Of Highly Strained Tricyclocompounds, Weiwei Yang
Electronic Theses and Dissertations
Anthracene-bridged dinuclear rhenium complexes are reported for electrocatalytic and photocatalytic carbon dioxide (CO2) reduction to carbon monoxide (CO). Related by hindered rotation of each rhenium active site to either side of the anthracene bridge cis and trans conformers have been isolated and characterized. Electrochemical studies reveal distinct mechanisms whereby the cis conformer operates via cooperative bimetallic CO2 activation and conversion and the trans conformer reduces CO2 through well-established single-site and bimolecular pathways analogous to Re(bpy)(CO)3Cl. Higher turnover frequencies are observed for the cis conformer (35.3 s−1) relative to the trans conformer (22.9 s−1) with both outperforming Re(bpy)(CO)3Cl (11.1 s−1). Photocatalytic …
Cognitive Influences On Preschoolers’ And Adults’ Eyewitness Memory In Response To Misleading Questions, Tonya M. Vandenbrink
Cognitive Influences On Preschoolers’ And Adults’ Eyewitness Memory In Response To Misleading Questions, Tonya M. Vandenbrink
Electronic Theses and Dissertations
The present study investigated cognitive influences on the malleability of memory for an eyewitness event, specifically focusing on age, executive function, and divided attention. Preschoolers (3- to 5-year-olds) and adults completed an executive function (EF) battery, witnessed an event either under divided attention (DA) or full attention (FA), following this, participants were asked a series of questions, the majority of which were misleading from the Video Suggestibility Scale for Children. This study supports previous findings that children are more suggestible than adults to misleading questions. However, there was no influence of EF on suggestibility in either children or adults. Lastly, …
Institutional Factors That Affect Transfer Student Sucess At A University In The Mid-South Region Of The U.S., Patricia Ann Coats
Institutional Factors That Affect Transfer Student Sucess At A University In The Mid-South Region Of The U.S., Patricia Ann Coats
Electronic Theses and Dissertations
At a four-year university located in the Mid-South region of the United States, students who transfer do so with the likelihood of spending more time and money completing a baccalaureate degree than non-transfer students. This is what research scholar Kevin Dougherty (1992) entitled the Baccalaureate Attainment Gap or the transfer gap. In this companion dissertation, using a multi-method approach, we use the quantitative data of transfer student graduation and retention rates along with qualitative data from interviews conducted with administrative staff about transfer student success. We consider these selected outcomes and administrative staff interviews to be institutional factors that help …
Examining The Role Of Reproductive Interference In The Decline Of Native Green Treefrogs Following Cuban Treefrog Invasions, Joseph Kennedy
Examining The Role Of Reproductive Interference In The Decline Of Native Green Treefrogs Following Cuban Treefrog Invasions, Joseph Kennedy
Electronic Theses and Dissertations
Reproductive interference occurs when the mating behaviors of one species negatively impact the fitness of another species. It is of increasing interest in invasive species biology because the introduction of alien species often leads to novel sexual interactions with native taxa, which can contribute to their decline. I examined whether reproductive interference plays a role in the decline of native green treefrogs (Hyla cinerea) following invasions of Cuban treefrogs (Osteopilus septentrionalis) in the southeastern United States. The impetus for this study revolves around similarities in spectro-temporal features of Cuban treefrog courtship calls and green treefrog aggressive calls. The significance of …
Food Insecurity And Health Of International Students, Jamie Nichole Benefield
Food Insecurity And Health Of International Students, Jamie Nichole Benefield
Electronic Theses and Dissertations
International college students may be at risk for suffering from food insecurity and poor health. The purposes of this study were to: 1) determine if the household adult food security status (HAFSS) differs between undergraduate and graduate international students (INSTUD) attending the University of Mississippi (UM); 2) establish if a statistically significant relationship exists between health (physical functioning (PF) , role limitations due to physical health (RLPH), role limitations due to emotional problems (RLEP), energy/fatigue (EF), emotional well-being (EWB), social functioning (SF), pain (P), and general health (GH) and HAFSS; 3) assess if health differs between INSTUD living in food …
Ni And Au Transition Metal Complexes In The Photocatalytic Co2 Reduction Reaction, Shakeyia Davis
Ni And Au Transition Metal Complexes In The Photocatalytic Co2 Reduction Reaction, Shakeyia Davis
Electronic Theses and Dissertations
The production of renewable fuels by the conversion of solar energy into chemical energy is a challenge. Photocatalytic and electrocatalytic conversion of CO2 to usable fuel precursors are approaches to overcoming this challenge. The two-electron reduction of carbon dioxide to carbon monoxide is an appealing process because CO can be used as a commodity chemical in industrial processes. Many molecular CO2 reduction catalysts have been reported and commonly use expensive late transition metals. These systems are inspired by natural photosynthesis and generally combine a photosensitizer, a catalyst, and a sacrificial electron donor. This work focuses nickel and gold complexes as …
Oasis, Sarah Helen Huddleston
Safety Assessment And Chemical Fingerprint Analysis Of Medicinal Plants Commonly Consumed As Herbal Teas; Rooibos (Aspalathus Linearis) And Moringa (Moringa Oleifera), Omer I. Fantoukh
Electronic Theses and Dissertations
The first chapter discusses the significance of natural products, safety challenges, and quality issues concisely. Specifically, the impact of herb-drug interaction on consumers and the quest for chemical markers for chemical fingerprinting development are provided. Rooibos tea (Aspalathus linearis) is a popular South African herbal tea enjoyed worldwide. Limited reports indicate the potential of rooibos tea to alter the activity of CYP450 isozymes. In chapter two, the phytochemical investigation of A. linearis resulted in the isolation and characterization of 14 phenolic compounds. Safety assessment of the phytochemicals through interaction with CYP, PXR, and P gp was conducted. The …
The Effect Of Hyperarticulation On The Perception Of Palatalization In Russian By L1 American English Speakers, Ekaterina Kolshenskaya
The Effect Of Hyperarticulation On The Perception Of Palatalization In Russian By L1 American English Speakers, Ekaterina Kolshenskaya
Electronic Theses and Dissertations
The current study investigates a relationship between the ease of perception of a feature of secondary palatalization in Russian and a speech condition (casual and hyperarticulated). Forty-one L1 American English speakers – the students of the Russian program at The University of Mississippi – took part in two experiments. In addition, the research aimed to explore the influence of a hyperarticulated speech condition on a level of language proficiency of students (beginner or intermediate) and investigate whether students of a certain level benefit from hyperarticulation more. The results of two experiments shothat none of the groups of students benefited from …
The Development Of Novel Rhenium- And Copper-Based Molecular Catalysts For Applications In Energy Conversion Chemistry, Joseph Michael Lee
The Development Of Novel Rhenium- And Copper-Based Molecular Catalysts For Applications In Energy Conversion Chemistry, Joseph Michael Lee
Electronic Theses and Dissertations
Since the Industrial Revolution, the consumption of fossil fuels has increased dramatically worldwide. The combustion of fossil fuels leads to the generation of carbon dioxide (CO2) emissions. CO2 is a greenhouse gas, but also a C1 feedstock that could be utilized for the generation of renewable fuels and commodity chemicals. However, CO2 is chemically inert and typically demands strong chemical reductants or very negative potentials before it undergoes conversion into reduced carbon products. The desire to carry out CO2 conversion in the presence of water presents a significant challenge, as protons may be reduced to hydrogen gas rather than facilitating …
The Carolina Gay Association, The Southeastern Gay Conferences, And Gay Liberation In The 1970s South, David Hooper Schultz
The Carolina Gay Association, The Southeastern Gay Conferences, And Gay Liberation In The 1970s South, David Hooper Schultz
Electronic Theses and Dissertations
This project explores how the successes and failures of local organizing networks in the South shaped national conversations on the rights of queer Americans. Its starting point is 1970 with the Triangle Gay Alliance’s formation in Raleigh, and it ends in 1978 with the third annual Southeastern Gay Conference and repeal of Miami-Dade County’s nondiscrimination ordinance. Paying close attention to the founding of the Carolina Gay Association in 1975 and the subsequent Southeastern Gay Conferences (SEGCs), the thesis connects the attendance at conferences to locally-organized activist groups from North Carolina to Florida to show that rather than being “lonely hunters” …
Identifying Transcription Co-Regulators Of Gcm/Repo In The Development Of Glia In Drosophila Melanogaster, Glendin Kostantinos Pano
Identifying Transcription Co-Regulators Of Gcm/Repo In The Development Of Glia In Drosophila Melanogaster, Glendin Kostantinos Pano
Electronic Theses and Dissertations
The molecular mechanism mediating the differentiation of neural progenitors to either glia or neurons is guided by the gene glial cells missing (gcm), a master regulator of glial cell differentiation. Knockout of this transcription factor (TF) and its homolog gcm2 in the fruit fly Drosophila Melanogaster results in embryos that develop neurons in place of lateral glia. Conversely, overexpression of gcm in those neural progenitors results in embryos that have substantially fewer neurons and excess glia(Jones, et.al, 1995; Hosoya, et.al, 1995; and Vincent, et.al, 1996). Additionally, gcm has also been shown to be involved in the differentiation of blood …
Exploring The Impact Of Mississippi Virtual Community College Academy Professional Development For Online Teaching, Terry Woodrow Pollard
Exploring The Impact Of Mississippi Virtual Community College Academy Professional Development For Online Teaching, Terry Woodrow Pollard
Electronic Theses and Dissertations
As online courses and programs continue to grow in number across Mississippi’s community college system, an examination of the system which trains and supports faculty has gone largely unexamined. The aim of this research was to study the impact of the Mississippi Virtual Community College Academy, the state’s online professional development system, on faculty. Structured interviews were conducted with nine faculty in four community colleges across the state to determine conditions that helped or hindered faculty in their implementation of content learned in online professional development courses on credit-bearing courses they would later teach. Analysis of faculty transcripts indicate faculty …
Relationship Of Expected Family Contribution To Student Success At Belhaven University, Kevin Alexander Russell
Relationship Of Expected Family Contribution To Student Success At Belhaven University, Kevin Alexander Russell
Electronic Theses and Dissertations
This study examines the relationship of expected family contribution (EFC) with student success for 427 freshmen students enrolled at Belhaven University in the Fall of 2016 and 2017. Success is measured by grade point average (GPA) and credit hours completed during the student’s freshman year. These two critical factors are used to determine a student’s satisfactory academic process (SAP). While measuring SAP is important, the contradiction between the university SAP and the SAP required by the state of Mississippi to remain eligible to receive funding are often in conflict.
Augmenting Land Cover/Land Use Classification By Incorporating Information From Land Surface Phenology: An Application To Quantify Recent Cropland Expansion In South Dakota, Lan Hoang Nguyen
Electronic Theses and Dissertations
Understanding rapid land change in the U.S. NGP region is not only critical for management and conservation of prairie habitats and ecosystem services, but also for projecting production of crops and biofuels and the impacts of land conversion on water quality and rural transportation infrastructure. Hence, it raises the need for an LCLU dataset with good spatiotemporal coverage as well as consistent accuracy through time to enable change analysis. This dissertation aims (1) to develop a novel classification method, which utilizes time series images from comparable sensors, from the perspective of land surface phenology, and (2) to apply the land …
Physics-Guided Deep Learning For Power System Sate Estimation, Lei Wang
Physics-Guided Deep Learning For Power System Sate Estimation, Lei Wang
Electronic Theses and Dissertations
Conventionally, physics-based models are used for power system state estimation, including Weighted Least Square (WLS) or Weighted Absolute Value (WLAV). These models typically consider a single snapshot of the system without capturing temporal correlations of system states. In this thesis, a Physics-Guided Deep Learning (PGDL) method incorporating the physical power system model with the deep learning is proposed to improve the performance of power system state estimation. Specifically, inspired by Autoencoders, deep neural networks (DNNs) are utilized to learn the temporal correlations of power system states. The estimated system states are checked against the physics law by a set of …
Standing Up Comedy: Analyzing Rhetorical Approaches To Identity In Stand-Up Comedy, Christopher Grabert
Standing Up Comedy: Analyzing Rhetorical Approaches To Identity In Stand-Up Comedy, Christopher Grabert
Electronic Theses and Dissertations
My thesis addresses contemporary conversations about stand-up comedy and the art-form's capacity for facilitating complex rhetorical decision-making. I examine how stand-up comedians have positioned themselves on-stage through choices pertaining revealing personal behaviors, personas, and beliefs in public settings. Ultimately, I argue that the art of stand-up does not require truth-telling on-stage, and that there exists an implicit contract between performers and audiences which details comedians' license to share falsehoods, exaggerations, and embellishments on-stage without the repercussions that accompany these actions in other discourse settings. Finally, I evaluate how comics have handled this rhetorical "license," with some performers delivering easily identifiable …
Latinx Student Success In Higher Education: Genres, Racialization, And Generic-Racial Interactions., Delia Garcia
Latinx Student Success In Higher Education: Genres, Racialization, And Generic-Racial Interactions., Delia Garcia
Electronic Theses and Dissertations
Using a transformative mixed methods approach, I explored the ways in which genres and racial projects are constitutive of each other and contribute to the racialization of Latinx students in higher education and result in disparate outcomes for Latinx students. Latinx research participants revealed the myriad ways in which they are racialized throughout the education system and the numerous ways they encounter whiteness on a daily basis. I focused on two genres in particular: the federally mandated race and ethnicity categories and their intersections with Big Data/Predictive Analytics (BDPA) projects at the university. Rhetorical Genre Studies (RGS) and Racial Formation …
Automated Synthesis Of Unconventional Computing Systems, Amad Ul Hassen
Automated Synthesis Of Unconventional Computing Systems, Amad Ul Hassen
Electronic Theses and Dissertations
Despite decades of advancements, modern computing systems which are based on the von Neumann architecture still carry its shortcomings. Moore's law, which had substantially masked the effects of the inherent memory-processor bottleneck of the von Neumann architecture, has slowed down due to transistor dimensions nearing atomic sizes. On the other hand, modern computational requirements, driven by machine learning, pattern recognition, artificial intelligence, data mining, and IoT, are growing at the fastest pace ever. By their inherent nature, these applications are particularly affected by communication-bottlenecks, because processing them requires a large number of simple operations involving data retrieval and storage. The …
Multi-Scale Modeling Of Viscoelastic Thin-Ply Composites, Milinda Madhusanka Yapa Yapa Hamillage
Multi-Scale Modeling Of Viscoelastic Thin-Ply Composites, Milinda Madhusanka Yapa Yapa Hamillage
Electronic Theses and Dissertations
Thin ply composites have been under the microscope of researchers for around two decades since Kawabe introduced the thin ply technology, in the Industrial Technology Center in Fukui, Japan. With the advancement of the technological aspects of manufacturing carbon fiber composites the tow spreading has improved so much as to reduce the thickness of a conventional ply up to even six-fold. Over the years carbon fiber composites have gained interest in space structures for reinforcement purposes in antennas, as structural elements that store strain energy and support the deployment of deployable structures, and in reflector concepts. Now thin-ply composites are …
Collaborative Artificial Intelligence Algorithms For Medical Imaging Applications, Naji Khosravan
Collaborative Artificial Intelligence Algorithms For Medical Imaging Applications, Naji Khosravan
Electronic Theses and Dissertations
In this dissertation, we propose novel machine learning algorithms for high-risk medical imaging applications. Specifically, we tackle current challenges in radiology screening process and introduce cutting-edge methods for image-based diagnosis, detection and segmentation. We incorporate expert knowledge through eye-tracking, making the whole process human-centered. This dissertation contributes to machine learning, computer vision, and medical imaging research by: 1) introducing a mathematical formulation of radiologists level of attention, and sparsifying their gaze data for a better extraction and comparison of search patterns. 2) proposing novel, local and global, image analysis algorithms. Imaging based diagnosis and pattern analysis are "high-risk" Artificial Intelligence …
Characterization Of Rare-Earth Doped Thermal Barrier Coatings For Phosphor Thermometry, Quentin Fouliard
Characterization Of Rare-Earth Doped Thermal Barrier Coatings For Phosphor Thermometry, Quentin Fouliard
Electronic Theses and Dissertations
Thermal Barrier Coatings have been extensively used to protect and insulate the metallic components in turbine engines from extreme environments to achieve higher turbine inlet temperatures, resulting in an increase in combined engine cycle efficiency, lowering NOx emissions and fuel consumption. Additionally, as the major failure mechanisms determining lifetime are thermally activated during engine operation, uncertainty in temperature measurements affects lifetime prediction. Early detection of Thermal Barrier Coatings spallation symptoms, associated with local delamination induced temperature changes, can reduce forced engine outages. Further improvements are envisioned with the development of more reliable measurement techniques. For this purpose, Phosphor Thermometry has …
Subjective Measures Of Implicit Categorization Learning, Audrey Zlatkin
Subjective Measures Of Implicit Categorization Learning, Audrey Zlatkin
Electronic Theses and Dissertations
The neuropsychological theory known as COVIS (COmpetition between Verbal and Implicit Systems) postulates that distinct brain systems compete during category learning. The explicit system involves conscious hypothesis testing about verbalizable rules, while the implicit system relies on procedural learning of rules that are difficult to verbalize. Specifically from a behavioral approach, COVIS has been supported through demonstrating empirical dissociations between explicit and implicit learning tasks. The current studies were designed to gain deeper understanding of implicit category learning through the implementation of a subjective measure of awareness, Meta d', which until now has not been validated within a COVIS framework. …
Metabolic Effects Of 17a-Estradiol Are Growth Hormone Independent And Sex Specific, Silvana Sidhom
Metabolic Effects Of 17a-Estradiol Are Growth Hormone Independent And Sex Specific, Silvana Sidhom
Electronic Theses and Dissertations
Aging is a major risk factor for metabolic syndromes and type two diabetes. With growing elderly populations worldwide and increasing incidence of age-related diseases there is a great need to develop pharmacological interventions that would delay aging and protect from age-related diseases. 17-alpha estradiol (17α-E2) is an epimer of the primary female sex hormone estradiol and has been shown to extend lifespan and downregulate markers of age-related metabolic dysfunction in male mice. Because 17α-E2 does not induce feminization in males it holds potential as a novel therapeutic in humans for age-related metabolic dysfunction. Importantly, we have previously shown that 17α-E2 …
Mechanism Of Nanogp8 In Glioblastoma Multiforme, Jonhoi Smith
Mechanism Of Nanogp8 In Glioblastoma Multiforme, Jonhoi Smith
Electronic Theses and Dissertations
Glioblastoma multiforme (GBM) is an incurable brain tumor, with patients only expecting to live 15 to 16 months post-diagnosis with the most current treatments options including surgery, chemotherapy, and radiation. How GBM resist treatment is still not very well known. However, cancer stem cells (CSCs), a subset of cells in GBM tissue considered responsible for therapeutic resistance and the poor patient prognosis. NANOG, a homeobox gene, is responsible for maintaining pluripotency of embryonic stem cells and is observed in CSCs. NANOGP8, a retrogene in the NANOG family is expressed in CSCs and provides cells with stem-like characteristics previously observed in …
Identification And Functional Characterization Of A Long Non-Coding Rna Associated With Prostate Cancer, Md Faqrul Hasan
Identification And Functional Characterization Of A Long Non-Coding Rna Associated With Prostate Cancer, Md Faqrul Hasan
Electronic Theses and Dissertations
Prostate cancer is the most common cancer in men in the western world. Although early stage prostate cancer is treatable late stage, more specifically, metastatic and drug resistant prostate cancers are mostly incurable. The failure of current treatments obligates the research community to explore novel areas in prostate cancer biology and find better therapeutic targets. Emerging evidences show that non-coding RNAs specifically long non-coding RNAs (lncRNAs) play regulatory roles in various cellular processes and are frequently dysregulated in cancer including prostate cancer. These aberrantly expressed lncRNAs mostly with unexplored genetic information may drive cancer progression. Previous studies done in our …
Teachers' Perceptions Of Safety Regarding School Shootings, Megan Olive
Teachers' Perceptions Of Safety Regarding School Shootings, Megan Olive
Electronic Theses and Dissertations
As a result of high media attention surrounding school shootings in recent years, it may appear that American public schools are becoming dangerous places (Schildkraut & Elsass, 2016; Elsass, Schildkraut, & Stafford, 2016; Toppo, 2013). Though schools remain to be one of the safest locations for children, various safety measures are discussed and implemented in schools to combat this perceived problem and ensure the safety of school campuses. Discussions of best safety practices spikes directly following a school shooting event from relevant parties, such as school administration, law enforcement agencies, parents, and students, (Crawford & Burns, 2015; Chrusciel, Wolfe, Hansen, …
Development Of A Functional Testing Platform For The Sensory Segment Of The Neuromuscular Reflex Arc, Alisha Colon
Development Of A Functional Testing Platform For The Sensory Segment Of The Neuromuscular Reflex Arc, Alisha Colon
Electronic Theses and Dissertations
Investigations of human biology and disease have been hindered by the use of animal models. The information obtained from such studies often results in clinically irrelevant results and drug trial failures. Additionally, several governing bodies have been formulating legislation to move away from animal models and toward more ethical and efficient testing platforms for drug discovery and cosmetic research. As an answer to these issues, "body-on-a-chip" systems have been a rapidly developing field which easily recapitulates in vivo functionality, providing a more relevant, repeatable, and ethical testing platform to better predict biology. These systems can be used as human-based testing …
Controlled Bubble Dynamics Inside Micropillar Arrays, Faraz Khalil Arya
Controlled Bubble Dynamics Inside Micropillar Arrays, Faraz Khalil Arya
Electronic Theses and Dissertations
Bubble dynamics inside micro domains was manipulated and used to pump liquid. Micropillars were formed inside two 1.5 mm wide and 220 µm high microchannels with a length of 23 mm. One microchannel had three arrays of micropillars with diameters of 40 µm and the other had a single array of micropillars with diameters of 30 µm. An array of five 200 µm by 200 µm heaters was deposited inside these micropillar arrays and was used to control bubble size and trajectory. A sequential power switching of the heaters was used to pump liquid in a desired direction with a …