Digital Commons Network^™

Bioavailable Iron In Equatorial Pacific Ocean Aerosol Samples, Hsiang T Teng

All Master's Theses

Oceanic iron (Fe) fertilization experiments performed in remote regions have established that Fe additions draw carbon into the ocean, at least over the months-long time frame of the experiments. However, the mechanisms that control Fe speciation in atmospheric aerosol particles before and after deposition into the surface ocean remain largely unknown. This is in part due to the analytical challenge of quantifying Fe at environmentally significant sub-nano molar levels. The flow injection analysis method combined with the luminol chemiluminescence analytical system allows us to explore the near-real time determination of pico-molar levels of both Fe(II) and H₂O_{2 …}

An Economic Analysis Of The Deepwater Horizon Economic Settlement, Cantrell Gideon Norman

Honors Theses

The Deepwater Horizon oil spill of 2010 significantly impacted the Gulf Coast economy. The aim of this paper is to determine the adequacy of Deepwater Horizon Economic Settlement payments in achieving full recovery and restoration of the Gulf Coast economy. This paper contextualizes the event, analyzes other disaster techniques, and discusses the impact of the oil spill on dominant coastal industries. The results are constructed through linear regression models on employment figures for the coastal counties of all five Gulf states. An argument for each state is formed based upon the regression results, supplemented with outside sources and additional data …

Memory Retention Rates Of Gossip-Related Information, Hannah R. Rogers

Honors Theses

The aim of this study is to determine if gossip-related information produces higher memory retention rates than scientific information. Participants completed a two-part survey. During the first part of the survey, participants read nine paragraphs, separated into three categories. Three were scientific, three were non-celebrity gossip, and three were celebrity gossip. After reading each article, participants rated each on a scale of 1-10 based on both personal relevance and how interesting they found each article. After a week delay, participants completed a multiple-choice memory test about the articles read the week before. The study found that while scientific articles were …

Population Genetics Of The Giant Red Centipede Along The Appalachian Mountains, Kayla Elayne Ladner

Honors Theses

This study focused on population genetics of the giant red centipede, Scolopocryptops sexpinousus, in the Southern Appalachian Mountains. Two genetic markers were used—the mitochondrial COI gene, and the nuclear RNA Polymerase II gene. The goal of this study was to determine how many genetically distinct populations of this invertebrate species exist within the study area, and to understand the spatial distribution of genetic diversity within and among populations. I hypothesized several genetically distinct populations of S. sexpinosus would be detected because the complex topographic characteristics and historical climate cycles of the region are thought to limit movement of many forest …

Synthesis Of Difluoromethyl And Monofluoromethyl Ketones For Biological Evaluation At The Gaba-B Receptor, Mallory Maier

Honors Theses

The central nervous system communicates using neurotransmitters. Most are excitatory neurotransmitters, such as acetylcholine, dopamine, and serotonin, but

Psychosocial Care In The Syrian Refugee Crisis, Miller Richmond

Honors Theses

The Syrian civil war created millions of refugees who are internally displaced across Syria and in surrounding host countries. The use of violence and forms of warfare against the Geneva Convention make this crisis particularly traumatic for civilians, leading to high rates of PTSD and depression among the refugee population. Relying on concepts of structural violence and the ecology of health, I justify the use of a psychosocial framework to build refugee crisis response in Jordan. I performed ethnographic fieldwork to collect data in the form of stakeholder and care provider interviews and training manuals, and I analyzed and critiqued …

Healthcare Professionals Knowledge And Attitudes Regarding Biosimilars In Northern Mississippi, Amanda Seals

Honors Theses

The emergence of biologics over the past the past few decades has led to a new interest in the production of a classification of drugs known as biosimilars. The vast complexity involved in the discovery, development, and manufacturing of biologics and biosimilars has made researching the knowledge and perceptions among healthcare professionals important. Healthcare professionals must have an understanding of biologics, as these medications are used for some of the most rare diseases. Healthcare professionals in northern Mississippi were surveyed on their knowledge of and attitudes towards biologics and biosimilars in order to gain insight on the current status of …

A Preface To The Philosophy Of Legal Information, Kevin P. Lee

SMU Science and Technology Law Review

No abstract provided.

Optimal Use Of Eeg Recordings To Target Active Brain Areas With Transcranial Electrical Stimulation, Jacek P. Dmochowski

Publications and Research

To demonstrate causal relationships between brain and behavior, investigators would like to guide brain stimulationusing measurements of neural activity. Particularly promising in this context are electroencephalography (EEG) and transcranial electrical stimulation (TES), as they are linked by a reciprocity principle which, despite being known for decades, has not led to a formalism for relating EEG recordings to optimal stimulation parameters. Here we derive a closed-form expression for the TES configuration that optimally stimulates (i.e., targets) the sources of recorded EEG, without making assumptions about source location or distribution. We also derive a duality between TES targeting and EEG source …

Borneol, A Novel Agent That Improves Central Nervous System Drug Delivery By Enhancing Blood–Brain Barrier Permeability, Qun-Lin Zhang, Bingmei M. Fu, Zhang-Jin Zhang

Publications and Research

The clinical application of central nervous system (CNS) drugs is limited by their poor bioavailability due to the blood–brain barrier (BBB). Borneol is a naturally occurring compound in a class of ‘orificeopening’ agents often used for resuscitative purposes in traditional Chinese medicine. A growing body of evidence confirms that the ‘orifice-opening’ effect of borneol is principally derived from opening the BBB. Borneol is therefore believed to be an effective adjuvant that can improve drug delivery to the brain. The purpose of this paper is to provide a comprehensive review of information accumulated over the past two decades on borneol’s chemical …

The Impact Of New York State's 2016 Mold Licensing Requirement On Indoor Air Quality Assessments, Angelo Lampousis, Mark Drozdov

Publications and Research

As of January 2016, New York joined a select number of states in regulating mold. The New York State Department of Labor has approved mold-related training courses in three levels, ranging from two to four days. These include the mold abatement worker, mold remediation contractor, and mold assessor courses. In this presentation we share the experience obtained to date from delivering the above referenced courses and challenges as an approved training provider. We also evaluate the relative effectiveness of the mode of delivery as it relates to different audiences.

T. E. Lawrence's Seven Pillars Of Wisdom And The Erotics Of Literary History: Straddling Epic., Václav Paris

Publications and Research

No abstract provided.

Environmental And Climate Justice Along The Brahmaputra River In Northeast India, Costanza Rampini

Faculty Publications, Environmental Studies

The glaciers of the Himalayas are the source of all of Asia’s major rivers and are crucial to Asia’s water supply, economies, and livelihoods. The Himalayan region is uniquely vulnerable to the impacts of anthropogenic climate change, while also becoming one of the most dammed regions in the world. This case study explores the unequal distribution of the impacts of climate change and dam building along the Brahmaputra River in Northeast India. It examines how the combined impacts of these two processes negatively affect local communities and explores environmental and climate justice issues. In discussing climate change impacts and hydropower …

Exploring A School Culture And Climate Where Students Can Flourish: Using Focus Group Methodology To Capture Key Stakeholder Perceptions About School Culture And Climate In An Alternative Education High School., Michael Lee Paynter

Dissertations

This study was a qualitative action research project that involved focus groups of key stakeholders at an alternative education high school including: students, teaching staff, classified staff, supervisors, families, and collaborative partners. A semi-structured interview guide was used to discover their perceptions of a school culture and climate where students FLOURISH. The word FLOURISH is used in this research to describe the optimal experience of thriving and growing as well as an acronym that contains the elements that a literature review found to be important for such environments serving the most vulnerable student populations. This type of research is especially …

Broke But Not Without Hope: Exploring Exits From Housing First And Returns To Homelessness, Jennie Ann Cole

Theses and Dissertations

“…he succeeded in giving the impression of being broke but not without hope.”

Nels Anderson, The Hobo, 1923

Introduction: This research offers a thick and rich, multidimensional and situational look, into a Housing First program in Charlotte, North Carolina. This dissertation focuses on individuals who have experienced chronic homelessness who exit Permanent Supportive Housing (PSH) programs that employ a Housing First (HF) model and return to homelessness. The ultimate goal of my research was to address the gap in knowledge service providers have in housing retention for the chronically homeless and to break the cycle of misunderstanding around why people …

Song Of The Scapegoat: How Silence Augments Kenneth Burke’S Notion Of The Scapegoat In Political Rhetoric, Mary Elizabeth Smith

Theses and Dissertations

President Donald Trump ascended to the US’s highest hall of power through rhetoric that scapegoated marginalized groups, such as Muslims, Hispanics, immigrants, foreigners, and others. This work considers the executive order President Donald Trump released January 27, 2017, and its revision released March 06, 2017, for how it exemplifies Kenneth Burke’s notion of the scapegoat, specifically as outlined in A Grammar of Motives and A Rhetoric of Motives. These executive orders have come to be known as the “Muslim Ban” due to the way they implicate Muslims in charges of terrorism, harm, and danger and affect the lives and movement …

Molecular Exploration Of Bioavailable Dissolved Organic Matter Across Aquatic Ecosystems, Yuan Shen

Theses and Dissertations

Dissolved organic matter (DOM) in aquatic ecosystems is a large reservoir of reduced carbon that is mostly resistant to degradation. A small fraction of DOM cycles relatively quickly and is biologically utilized on timescales of days to months. This bioavailable DOM (BDOM) supports aquatic food webs, drives major elemental cycles, and is coupled to atmospheric CO2. Despite wide-ranging importance, bioavailability of DOM and its linkages to ecosystem properties (e.g., primary production, nutrients) are poorly characterized, particularly at the ecosystem level. Bioassay experiments are commonly used to determine BDOM, but this approach alters conditions and has limited spatial and temporal coverage. …

Glacial To Holocene Changes In Eastern Equatorial Pacific Deep-Water Chemistry And Circulation, Natalie E. Umling

Theses and Dissertations

It has been hypothesized that the oceans store CO2 during glacial periods and then release it to the atmosphere, causing the onset of warm interglacial periods (Sigman and Boyle, 2000). Documenting this past transfer of CO2 between the oceans and atmosphere is of utmost importance for better understanding the impact that anthropogenic CO2 has and will have on Earth’s climate. The last deglaciation is a good analogue to modern increases in CO2 and temperature and is recent enough to be studied using radiocarbon. This period provides important insights into the nature of climate changes during the transition from glacial to …

Detracking High School Physical Science Classes Through Teacher Efficacy: An Action Research Study, Vincent Scott Taylor

Theses and Dissertations

This study uses the action research method to determine whether students enrolled in a basic science course (Physical Science College Prep) can be successful learning more advanced material (Physical Science Advanced) by increasing teacher efficacy. Currently, there are three levels of Physical Science courses taught at the study school, a high school in South Carolina, USA. The most basic course, Physical Science College Prep, is comprised of 76% minority students, and 56% who receive a free or reduced-cost lunch. In the spring semester of 2017, a group of students (n = 14) completed two units of study: Unit One - …

Subsurface Transport In A North Inlet, South Carolina Salt Marsh: A Porewater Salinity Model, Carolyn Ryan

Theses and Dissertations

Subsurface transport in coastal salt marshes influences the nutrient budget of coastal environments, but is not fully understood. To expand our understanding of this transport, a simple numerical model was developed. The model simulated vertical transport of salt through the surficial muds at a North Inlet marsh on the coastal plain of South Carolina. To improve the model, a tracer study was utilized to calculate the average velocity of groundwater flow through the system. The model was compared with porewater salinity measured using tension samplers and passive diffusion samplers. Each method produced different, uncorrelated results. However, accounting for macro-pores in …

Serpentinization And Synthesis: Searching For Abiotic And Biotic Non-Volatile Organic Molecules In The Subsurface Of The Atlantis Massif, Katherine A. Hickok

Theses and Dissertations

High concentrations of hydrogen created during serpentinization can promote the formation of abiotic organic carbon molecules such as methane, formate, and short chain hydrocarbons and, in laboratory experiments, larger molecules containing up to 32 carbon atoms. Subsurface archaeal and bacterial communities can use these reduced compounds for metabolic energy. International Ocean Discovery Project Expedition 357 drilled 17 boreholes into the Atlantis Massif with the goals of investigating carbon cycling and the presence of life in a zone of active serpentinization. The expedition recovered multiple lithologies including gabbros, basalts, carbonate sands, and serpentinites. A subset of contrasting lithologies were analyzed for …

A Virtual Learning System’S Impact On Student Achievement In A Secondary Biology College Preparatory Course; An Action Research Study, Jamie Ankney Whitlock

Theses and Dissertations

The purpose of this action research study was to describe the effectiveness of a virtual learning system (VLS) on college preparatory biology students’ pre- and posttest scores. Data were gathered from observations of students using the VLS for video lectures, practice tests, reviewing, and other online simulations in the spring of 2017. Data were also collected using a pretest and a posttest designed by the participant-researcher before and after the implementation of the VLS. A t test was used to analyze the pre- and posttest quantitative data, and the constant comparative method was used to analyze the qualitative data from …

Paleodemographic And Biochemical Analysis Of Urbanization, Famine, And Mortality, Brittany S. Walter

Theses and Dissertations

Urbanization is a transitional period often associated with deteriorating population health and increased mortality, as the rapid increase of population density in urban centers facilitates the transmission of infectious diseases, unsanitary living conditions, and precarious food supplies. Research on the transition to an urban environment in the past offers a temporal depth to our understanding of the consequences of urbanization that cannot be accomplished through examination of contemporary populations. This project integrates paleodemographic (hazard analysis) and biochemical (stable isotope analysis) approaches to examine the health and diet of inhabitants in late medieval England (c. 1120-1539 CE), specifically the relationship between …

Polymer Grafted Nanoparticles For Designed Interfaces In Polymer Nanocomposites, Mohammad Mohammadkhani

Theses and Dissertations

This dissertation presents the design, synthesis, and characterization of polymer nanocomposite interfaces and the property enhancement from this interface design. Through the use of reversible addition fragmentation chain transfer (RAFT) polymerization for the grafting of polymer chains to silica nanoparticles, the surface of silica nanoparticles can be manipulated to tune the properties of nanocomposites by controlling the interface between the particles and the polymer matrix.

In the first part of this work, compatibility of 15 nm silica nanoparticles grafted with different alkyl methacrylates with linear low density polyethylene was investigated. SI-RAFT polymerization of hexyl, lauryl, and stearyl methacrylate on silica …

Maternal Physical Activity And Cardiorespiratory Fitness During Pregnancy And Its Relation To Infant Size, Samantha M. Mcdonald

Theses and Dissertations

Recent evidence indicates that U.S.-born infants are larger today compared to 20 years ago. A strong determinant of neonatal size is maternal body mass, where larger mothers deliver larger infants. Consistent evidence indicates that higher levels of maternal physical activity (PA) during pregnancy reduce the risk of delivering a larger infant. However, this protective effect has only been demonstrated in normal weight pregnant women. Little is known about the relationship between maternal PA and neonatal size in overweight or obese pregnant women. Moreover, no studies have examined the association between maternal cardiorespiratory fitness (CRF), an indicator of habitual PA, on …

Flipped Classroom Pedagogical Model And Middle-Level Mathematics Achievment: An Action Research Study, Cassondra Leo

Theses and Dissertations

Flipped Classroom Pedagogical Model and Middle-Level Mathematics Achievement: An Action Research Study describes an integers and rational numbers unit (TIRN) over a sixweek period in a seventh-grade flipped mathematics classroom. The identified problem of practice centers on these twenty-three student participants’ low achievement on math tests. The purpose of the study is to determine the relationship between a flipped classroom pedagogy and student achievement. The participant-researcher aimed to differentiate instruction for these seventh-grade student-participants using a flipped model that included videos. This flipped classroom pedagogical model allowed for additional time for the participant-researcher to assist struggling student-participants and to foster …

Children’S Obesogenic Behaviors During Summer Versus School, Keith Brazendale

Theses and Dissertations

Emerging evidence shows children gain 3-5 times the amount of weight and lose cardiorespiratory fitness (CRF) during summer compared to the 9-months of the school year. Notably, this trend is more pronounced in children who are already overweight or obese going into summer and/or from low-income ethnic minority households. There is little evidence to investigating the underlying mechanisms driving the pronounced occurrence of these negative health outcomes during summer.

The purpose of this dissertation as a whole was to investigate children’s obesogenic behaviors (physical activity, sedentary/ screen time, sleep, and diet) during summer versus school, and compare any differences in …

Stilbenes: Therapeutic Interventions Targeting Amyloid Β Protein Aggregation In Alzheimer’S Disease, Yiying Wang

Theses and Dissertations

Alzheimer’s disease (AD) is the most common form of dementia and accounts for 60-80 % of all dementia cases. In the United States, AD is ranked as the 6th leading cause of death and it is the only one among the top 10 that cannot be prevented, treated or even slowed. All FDA approved drugs focus on attenuating the symptoms for a limited time by regulating neurotransmitters without any intervention with the underlying disease process. A major player in the initiation and development of this debilitating disorder is the misfolding and subsequent aggregating of amyloid-β (Aβ) peptide. This aggregation process …

The Role Of Lipocalin-2 In The Hepatic Microenvironment Of Colorectal Cancer Metastasis, Daniel Titus Hughes

Theses and Dissertations

Colorectal cancer (CRC) is the second leading cause of cancer deaths in the United States. The major cause of death is metastasis and the frequent target organ is the liver. When diagnosed early at a localized stage, the five year survival rate after resection is 90%. However, after metastasis has occurred, this drops to less than 12%. Metastasis is often asymptomatic and diagnosed at the final stage when therapeutic options are limited. Because of this, the genetic and cellular mechanisms regulating metastasis are still poorly understood. Recent studies have shown that prior to the arrival of cancer cells at the …

Determining The Population Dynamics And Reproductive Life History Of Commercially Important Tunas In The Gulf Of Mexico, Katrina C. Hounchell

Theses and Dissertations

The Gulf of Mexico (GOM) is an important spawning ground for many commercially important fish species including yellowfin, skipjack, and blackfin tunas. In particular, it is an essential spawning habitat for Atlantic bluefin tuna, whose stock status is of great international concern. It is vital to the appropriate conservation management of these species to determine both the location of their spawning grounds and the genetic diversity found within them. Fish eggs are a fisheries-independent source of spawning information that can provide more accurate estimates of spawning sites compared to larvae. This study describes population diversity and reproductive life histories in …