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Localized Method Of Approximate Particular Solutions For Solving Optimal Control Problems Governed By Pdes, Kwesi Acheampong

Master's Theses

In this thesis, the method of approximate particular solutions(MAPS) and localized method of approximate particular solutions(LMAPS) with polynomial basis, and radial basis functions are proposed and applied on the optimal control problems(OCPs) governed by partial differential equations(PDEs).

This study proceeds in several steps. First, polynomial basis and radial basis functions are used to globally approximate solutions for the PDEs which have been combined into a single matrix system numerically from the optimality conditions of the OCPs. Secondly, polynomial and radial basis functions are used to locally approximate particular solutions for the same matrix system numerically. We use these approaches to …

Early Recruitment Of Crassostrea Virginica To Restored And Natural Oyster Reefs In The Western Mississippi Sound: Larval Supply And Post-Settlement Success, Leah Morgan

Master's Theses

The eastern oyster (C. virginica) is a foundation species that improves water quality, protects shorelines, provides refuge for other organisms, and contributes to commercial fisheries. Successful early recruitment of eastern oyster is vital for resupplying adult populations in the face of habitat loss. Coastal oyster populations are challenged by freshwater input, hypoxia, predation and overfishing. Consequently, substantial efforts have been dedicated toward oyster restoration within the northern Gulf of Mexico. The overall objective of this study was to consider the role and importance of early recruitment to oyster restoration in western Mississippi Sound. During the summer 2018 recruitment period, we …

Distribution, Abundance, And Trophic Ecology Of Anguilliform Leptocephali In The Northern Gulf Of Mexico, Lillian Collins

Master's Theses

All species of anguilliform eels have pelagic leptocephalus larval stages, which provides a means of monitoring the population dynamics of these otherwise cryptic and hard to study species. The goals of this study were to: 1) describe the distribution and abundance of anguilliform eel leptocephali across the northern Gulf of Mexico, and 2) examine the trophic ecology of leptocephali using stable isotope values of carbon and nitrogen (δ13C and δ15N). A 25-year (1990-2014) ichthyoplankton dataset provided by the National Oceanic and Atmospheric Administration (NOAA) Southeast Area Monitoring and Assessment Program (SEAMAP) was used to examine interannual variations in leptocephalus distribution, …

Development And Employment Of Environmental Dna Methods For The Detection Of Bull Sharks (Carcharhinus Leucas) In A Freshwater And Estuarine Interface In The Mobile-Tensaw Delta And Mobile Bay, Alabama, Katherine Schweiss

Master's Theses

Species conservation and management is influenced by the quality of monitoring methods employed, especially when targeting elusive, but ecologically significant species, like elasmobranchs. Bull Sharks (Carcharhinus leucas) are highly mobile predators that rely on estuaries and freshwater rivers for maturation, resources, and refuge; their ability to withstand changing environmental conditions may mean they are linking ecosystems through their habitat usage and movements. Rather than setting nets or attaching acoustic monitoring devices, which can be expensive, time-consuming, and invasive, the analysis of environmental DNA (eDNA) for tracing species presence was used to target C. leucasDNA. The present research …

Effects Of Water Table Depth And Edaphic Characteristics On Plant Diversity In A Southern Mississippi Pitcher Plant Bog, Patrick Kirby

Master's Theses

This study examined the effects that water table depth and soil characteristics have on plant species richness and species composition within pitcher plant bogs across seasons. Eight piezometers were installed at random distances to monitor long-term water table depth and pressure fluctuations along a ~710-meter line transect traversing upland and bog habitats. Vegetation sampling quadrats (n=128) were set up near each piezometer. Cover data and water table depths were collected in spring and late summer. Soil samples collected from each treatment group were used to obtain soil texture and nutrient data. The summer collection period yielded a total gdiversity of …

Estimating Body Mass Through Bone Mineral Density Studies Using Dexa (Dual-Energy X-Ray Absorptiometry), Kaitlin Harstine

Master's Theses

Identification of a decedent is one of the primary goals of forensic anthropologists. In order to do this, one must build a biological profile based on the remains that are provided. Sex, age, ancestry, and stature are four of the most common, however a fifth addition piece of information that could be beneficial is body mass. The goal of this research is to explore the relationship between bone mineral density (BMD) and body mass, using data collected from dual x-ray absorptiometry (DEXA) scans of 107 collegiate football athletes. Athletes are a good fit for this study because they have achieved …

The Effect Of Historic Shipwrecks On Sediment Microbiomes In The Northern Gulf Of Mexico, Melissa Brock

Master's Theses

Microorganisms are ubiquitously distributed across all aquatic habitats, but it is the environmental conditions of a habitat that determine which microorganisms can thrive in terms of abundance or metabolic activity. Habitats that experience consistent physical and chemical environmental conditions repeatedly favor specific taxonomic groups which may result in a microbial assemblage that is commonly associated with that habitat (i.e., a core microbiome). Core microbiomes have been identified for a variety of natural marine habitats including methane seeps, wood falls, octocoral, and deep-sea sediments. However, it was unknown if the presence of man-made structures on the seafloor, including historic shipwrecks, also …

Elevated Adhd Symptoms As A Predictor Of Rule Violations Among Male Juvenile Offenders, Kathleen Lolley Ramsey

Master's Theses

Youth with ADHD are disproportionately at-risk for engaging in criminality and aggression relative to the general population, and this may be a function of underlying executive function deficits associated with self-regulation. More specifically, youth with ADHD may be susceptible to difficulties with behavioral regulation (impulsivity) and emotional regulation (e.g., managing feelings of anger). The current study sought to expand on previous research to examine the relationship between ADHD symptoms and aggression and the potential moderating effects of anger control among institutionalized youth. Archival data comprising a sample (N=119) of male adolescents who were admitted to a maximum-security residential facility were …

Involuntary Signal-Based Grounding Of Civilian Unmanned Aerial Systems (Uas) In Civilian Airspace, Keith Conley

Master's Theses

This thesis investigates the involuntary signal-based grounding of civilian unmanned aerial systems (UAS) in unauthorized air spaces. The technique proposed here will forcibly land unauthorized UAS in a given area in such a way that the UAS will not be harmed, and the pilot cannot stop the landing. The technique will not involuntarily ground authorized drones which will be determined prior to the landing. Unauthorized airspaces include military bases, university campuses, areas affected by a natural disaster, and stadiums for public events. This thesis proposes an early prototype of a hardware-based signal based involuntary grounding technique to handle the problem …

Expanding The Fear Of Loss Of Vigilance Theory: Using Intolerance Of Uncertainty, Responsibility For Harm, And Fear Of Sleep To Predict Nocturnal Panic Attacks, Nicole S. Smith

Master's Theses

Nocturnal panic involves experiencing panic attacks out of a sleeping state without obvious causes such as nightmares or loud noises. Roughly half of patients with panic disorder will experience nocturnal panic in addition to panic attacks while awake, or daytime panic. Like daytime panic, nocturnal panic also occurs in other disorders such as PTSD. The Fear of Loss of Vigilance theory is currently the only model available to explain nocturnal panic. It suggests that nocturnal panickers fear states in which they cannot easily react to or protect themselves from danger. Prior research using a self-report measure to differentiate nocturnal and …

The Thiol Specific Antioxidant (Tsa1) Gene Is Required For Survival In Macrophages And Oxidative Stress Resistance In Histoplasma Capsulatum, Lauren Kennedy

Master's Theses

Histoplasma capsulatum(Hc) is a pathogenic fungus that causes one of the most common invasive fungal respiratory diseases, Histoplasmosis. Histoplasmaundergoes a dimorphic shift from mold to yeast which is crucial to pathogenesis of the organism.

The thiol specific antioxidant gene, Tsa1,is strongly upregulated in the yeast (pathogenic) morphotype. This data led to the hypothesis that this gene plays a role in protecting Hcfrom host mediated oxidative attack. To characterize Tsa1 function, a knockdown strain (tsa1-RNAi) was created by RNAi gene silencing. Expression of Tsa1in the tsa1-RNAistrain was reduced to 10% that …

The Variability Of High-Frequency Motions And Their Interactions With The Mesoscale On The Mississippi Shelf, Jordan Earls

Master's Theses

In this study, we examine the spatial and temporal variability of high-frequency and low-frequency motions across the Mississippi Shelf and how the high-frequency motions are modulated by low-frequency mesoscale motions. For this purpose, we use Acoustic Doppler Current Profiler (ADCP) measurements collected at nearshore (23 m), mid-shelf (60 m), and shelf break (88 m) stations. High-frequency motions are defined as motions with periods less than 36 hours, whereas mesoscale motions have larger periods. The collected datasets are analyzed through bandpass filtering, least square harmonic analysis, spectral analysis, and empirical orthogonal functions (EOF). We find that along-shelf barotropic mesoscale motions contain …

The Quiet Classroom Game With An Indiscriminable Contingency In A High School, Stefanie Schrieber

Master's Theses

The Quiet Classroom Game (QCG) is an interdependent group contingency utilized to decrease classroom noise levels, increase student engagement, and decrease disruptive behaviors in the classroom setting. The purpose of the current study was to investigate the effects of the QCG in three high school classrooms in the Southeastern United States. Classrooms were recruited based on teacher reports of excessive noise and high rates of disruptive behavior. A multiple baseline design with two intervention phases was utilized to examine the effects of the intervention. The first phase was the QCG alone, and the second phase was the QCG with an …

Changes In Antarctic Bottom Water Formation During Interglacial Periods, Samuel Glasscock

Master's Theses

In the modern Southern Ocean and during the last interglacial period, Marine Isotope Stage 5, there are observations that point to reduced Antarctic Bottom Water (AABW) formation. These reductions are believed to be driven by an increase in the strength of the Southern Ocean density stratification due to surface water freshening. Any reduction in AABW formation has important implications for global climate as AABW plays a vital role in the cycling of carbon in the world’s ocean. The primary question this study seeks to answer is do these AABW reductions occur during any of the other interglacials of the past …

The Examination Of The Function Of The Cofactor Schnurri In The Cyst Stem Cells Of The Drosophila Melanogaster Testis Niche, Jade Koretko

Master's Theses

The study of adult stem cells in modern day research provides pertinent information about the development of organisms, how they grow, and how tissue is maintained. Drosophila melanogaster provide an ideal model for in vivo stem cell research, with one of the best-characterized niches in the testis. The testis stem cell niche consists of a hub that provides signals to the local stem cells, germline stem cells (GSCs), and cyst stem cells (CySCs). The CySCs produce cyst cell lineage that will provide support for the GSC daughter cells, which differentiate into sperm. Previously, Matunis, et al. determined the function of …

An Investigation Of Factors Affecting The Work Motivation Of Nurses Working At University Medical Centers, Quynh Duc Nguyet Nguyen

Master's Theses

The study was conducted to investigate factors affecting the work motivation of nurses working at University Medical Center. The study also examined the correlation between factors that might affect work motivation such as demographic characteristics (age, gender, job position, work unit, educational level, etc.). Determination of the importance of motivational factors is essential for managers and would help them develop appropriate solutions to enhance motivation for nurses. A descriptive cross-sectional design was used. One hundred and forty (N = 140) nurses working at University Medical Center participated in answering a questionnaire to determine the importance of motivational factors. In addition, …

A Description Of Lichen Community Structure And The Impacts Of Spruce Beetle Disturbance In Northwestern Colorado, Anna Freundlich

Master's Theses

Spruce beetle disturbance has affected millions of acres of forest throughout North America and Europe, but thus far little research has investigated how this disturbance influences lichen communities. To address this problem, we studied lichen communities and habitat characteristics within 44 plots across a chronosequence of spruce beetle damage spanning 1996–2017 in northwestern Colorado. We found 82 species of lichens, few habitat differences among spruce beetle disturbance classes, and only the most recently affected plots (2012–2017) had significantly different lichen community structure relative to remaining areas. Two primary gradients explained the majority of variation of lichen community structure within our …

Queering Fertility: Experiences Of Queer/Lesbian People Undergoing Fertility Treatment In A Heteronormative Society, Caitlin Ortis

Master's Theses

Due to the increase in lesbian, gay, bisexual, transgender, queer, and other (+) (LGBTQ+) people seeking fertility treatments or the “Lesbian Baby Boom” (Amato & Jacob, 2004; Batza, 2016; Dunne, 2000; Simon et al., 1993; Mamo, 2013), in which 30% to 50% of women who identify as lesbians hope to become parents (Amato & Jacob, 2004), it is necessary to examine the relationship between a person’s sexual orientation and her experiences receiving fertility treatments. While fertility treatment from a heterosexual perspective has been studied at length, few studies have examined how LGBTQ+ people are treated in fertility clinic settings. In …

Characterizing The Role Of Tumor Suppressors Merlin And Expanded In The Stem Cell Niche Of Drosophila Testes, Bryan Johnson

Master's Theses

The ability of adult organisms to maintain tissue homeostasis and repair tissue in response to injury is mediated by small groups of partially differentiated cells called adult stem cells that support the tissue they reside in. Adult stem cell maintenance is highly regulated by signals from the surrounding microenvironment referred to as the stem cell niche. A better understanding of this process will have important implications for the fields of both regenerative medicine and cancer biology. Due to the complexity of most niche environments in mammals, we turned to the less complex model organism Drosophila and the well-characterized niche in …

Characterizing The Susceptibility And Type I Interferon Response Of Primary Mammalian Cells During Zika Virus Infection, Douglas Petty

Master's Theses

Zika virus (ZIKV), a member of the genus Flavivirus, has become a major public health concern since 2007. During the most recent 2015 outbreak, ZIKV rapidly spread from South America to over 84 countries and territories across the world in two years. ZIKV has also been associated with previously uncharacterized neurological manifestations during the 2013 and 2015 outbreaks. The novel manifestations include Guillain-Barré Syndrome (GBS) in adults and Congenital Zika Syndrome (CZS) in newborns. GBS is a progressive paralysis caused by damage to the peripheral nervous system; while CZS is an all-encompassing term for the severe neurological and developmental complications …

The Water Table, Soil Moisture And Evapotranspiration Conditions Following The Removal Of Conifers From Two Encroached Meadows, Tyler J. Davis

Master's Theses

Montane meadows provide essential habitat for a variety of unique species and important ecosystem services in the western United States. Although important, meadows have experienced increased rates of conifer encroachment due to climate change, fire suppression and grazing. To combat meadow degradation from conifer encroachment, land managers have employed various restoration strategies one of which is conifer removal. Multiple studies have investigated the relationship between meadow hydrology and vegetation; however, few have assessed the effect of conifer removal on meadow groundwater. The goal of this study is to determine if the removal of conifers from an encroached meadow has an …

Evaluation Of Pheromone Mating Disruption For California Red Scale Control In Commercial California Citrus, Joel Timothy Leonard

Master's Theses

California red scale (CRS), Aonidella aurantii, is an increasingly injurious insect pest for the California citrus industry due to insecticide resistance, changing weather patterns, and shifting trade regulations. The presence of the insect on fruit, damages the rind of the fruit and high populations can cause dieback of branches as well as lower yields. Pheromone mating disruption of CRS has the potential to alleviate population control concerns and reduce insecticide use. The efficacy of the pheromone mating disruption technique for pest management of CRS was determined using the products CheckMate® CRS and Semios CRS Plus. CheckMate® CRS was evaluated …

Single-Cell Impedance Spectroscopy, David Paul Lange

Master's Theses

Impedance spectroscopy (IS) is an important tool for cell detection and characterization in medical and food safety applications. In this thesis, the Cal Poly Biofluidics Lab’s impedance spectroscopy system was re-evaluated and optimized for single-cell impedance spectroscopy. To evaluate the IS system, an impedance spectroscopy bioMEMS chip was fabricated in the Cal Poly Microfabcrication lab, software was developed to run IS experiments, and studies were run to validate the system. To explore IS optimization, Maxwell’s mixture theorem and the Schwartz-Christoffel transform were used to calculate an analytic impedance solution to the co-planar electrode system,a novel volume fraction to account for …

Evaluation Of Drought-Resistant Plants For Beneficial Insect Attraction, Benjamin Gluck

Master's Theses

Beneficial insects, such as natural enemies and pollinators, provide billions of dollars of ecological services to agricultural operations. However, as the climate changes, Connecticut is projected to have longer periods of drought. This could negatively impact the availability of flowering plants, and the beneficial insects who rely on their floral resources.

This research focuses on the diversity of insect visitors to five species of drought-resistant plants at the Plant Science Research and Educational facility. Over the two-year study the visitation frequency of pollinators and beneficial insects on the plants was observed, insect samples were collected for further identification. Agastache foeniculum …

Written In Black, White, And Red: An Exploration Of Civilizer Theology In American History, Jeremy Mcginniss

Master's Theses

This paper proposes an extended definition and discusses examples of civilizer theology within the perceptions and practices of white Protestant American Christianity faith traditions. Civilizer theology is defined as a self-referential, self-fulfilling framework actively shaping the expectations, behaviors and practices of societal norms driving cultural practices. Examples are selected as guided by three significant and interdependent dispositions characterizing civilizer theology: cultural decay/moral decline, authority, and violence. This paper hypothesizes theological interpretation, application and exegesis, mediated by the three dispositions, are deliberately applied to support socio-economic, cultural and political ends with the goal of maintaining power structures benefiting a particular group.

The Democratization And Development Of Cell-Free Protein Synthesis, Max Z. Levine

Master's Theses

Cell-free protein synthesis (CFPS) using crude lysates has developed into a robust platform technology over the last 60 years to express numerous types of recombinant proteins. The open-nature, elimination of reliance on cell viability, and focus of all energy towards production of the protein of interest represent substantial advantages of CFPS over in vivo protein expression methods. CFPS has provided new opportunities across a series of research fields that include metabolic engineering, therapeutic and vaccine development, education, biosensors, and many more. In recent years, optimizations of CFPS have even allowed the platform to reach the industrial level of protein production. …

Effects Of Intertidal Position On Metabolism And Behavior In The Acorn Barnacle, Balanus Glandula, Kali Horn

Master's Theses

The intertidal zone is characterized by persistent, tidally-driven fluctuations in both abiotic (e.g., temperature, [O₂], salinity) and biotic (e.g., food availability, predation) conditions, which makes this a very physiologically challenging habitat for resident organisms. The magnitude and degree of variability of these environmental stressors differs between intertidal zones, with the most extreme physiological stress often being experienced by organisms in the high intertidal. Given that many of the fluctuating conditions in this environment are primary drivers of metabolic rate (e.g., temperature, [O₂], food availability), we hypothesized that sessile conspecifics residing in different tidal zones would exhibit …

Asian Long-Range Transport In Relation To Atmospheric Rivers In Northern California, Catherine Liu

Master's Theses

The study investigated the effect of aerosol long-range transport on precipitation over northern California during atmospheric river (AR) events in the 2017 cold season (January-April). ARs in 2017 were among the strongest to date and the intense precipitation associated with the ARs resulted in flooding, destruction of property, and contamination of water supplies. The aerosol optical depth (AOD) from Moderate Resolution Imaging Spectroradiometer (MODIS) data showed Asian dust traveling across the northern Pacific Ocean along with AR events. Aerosol measurements in California, provided by the Interagency Monitoring of Protected Visual Environments (IMPROVE), showed that more Asian dust tends to be …

Time-Invariant Tensile Necking Of Blood On An Electrowetting Digital Microfluidic Platform, Curtis Young

Master's Theses

Recent developments in electrowetting-on-dielectric (EWOD) technology have expanded the possibilities for testing methods and investigation of blood. This work evaluated the development of necking geometry of whole blood and red blood cell (RBC) suspensions on a digital microfluidic (DMF) platform. This was achieved by applying tension to liquid droplet specimens on an EWOD-based device using applied electrowetting forces, thereby inducing necking. The deformation of 5 μL fluid specimens was recorded using neck radius and minimum neck width as two characteristic geometric parameters. Tensile tests were performed on phosphate-buffered saline (PBS), whole blood diluted in PBS, and RBCs suspended in PBS …

The Effects Of Culture And Gender Roles On The Efficacy Of Social Support As A Coping Mechanism For Stress, Quy Minh Vu

Master's Theses

Though social support has been thought to be an effective coping mechanism for handling distress, this generalization comes with limitations in that social support is highly intertwined with specific characteristics that could alter both help-seeking behavior and its outcomes. The present study examined the effects of cultural differences on the effectiveness of differing social support sources (i.e., parents versus peers) between European American and Asian/Asian American samples, as well as the influence of gender role orientation on social support outcomes. Ninety-Five European American and Asian/Asian American participants were assigned to either a parent or peer social support letter task prior …