Digital Commons Network^™

Real-Time Prediction-Driven Dynamics Simulation To Mitigate Frame Time Variation, Mackinnon A. Buck

Master's Theses

Real-time physics engines have seen recent performance improvements through techniques like hardware acceleration and artificial intelligence. However, state of the art physics simulation technology fails to account for the variation in simulation complexity over time. Sudden increases in contact frequency between simulated bodies can momentarily increase the processing time per frame. To solve this, we present a prediction-driven real-time dynamics method that uses a memory-efficient graph-based state buffer to minimize the cost of mispredictions. This buffer, which is generated by a separate thread running the physics pipeline, allows physics computation to temporarily run slower than real-time without affecting the frame …

Plant Disease Detection Through Convolutional Neural Networks: A Survey Of Existing Literature, Best Practices, And Implementation, Kevin Label

Master's Theses

In the United States alone, common diseases spread among plants account for billions of dollars lost in crop yield each year. This issue is exacerbated in countries with less infrastructure to defend against crop epidemics, and can lead to famine and forced migration. Farmers can seek the help of plant pathology experts to defend against diseases and detect crop irregularities early on. However, access to experts can be difficult, and even those trained in the field may miss symptoms before it is too late. To assist in early disease detection, a number of papers have been released on the potential …

Effects Of Nitrogen Management And Cultivar On Strawberry Production Under Disease Pressure, Kamille A. Garcia-Brucher

Master's Theses

Effects of nitrogen management and cultivar on strawberry production under disease pressure

Kamille Garcia-Brucher

California strawberry growers face increasing regulatory pressures to manage nitrogen (N) applications in their production system. Standard practice in the California strawberry industry is to apply a synthetic pre-plant controlled release fertilizer (CRF) to ensure the crop has sufficient N during winter establishment. Some research from the UC Cooperative Extension suggests this practice is not efficient at delivering N to the crop since most of the N is released from CRF before strawberry crop N uptake is significant. Another concern for California strawberry growers is loss …

Assessing The Effects Of Oxaliplatin On An In Vitro Three-Dimensional Human Colorectal Cancer Model, Sabrina Nelson

Master's Theses

Colorectal cancer is the third most common cancer in the United States with a 5-year late-stage survival rate of only 14%. Due to the lack of translation between animal models and clinical trials as well as the inefficacy of many chemotherapeutics in initial clinical trials, researchers are turning to in vitro drug screening models in an effort to mimic the conditions in vivo. This research project aimed to validate an in vitro tumor culture model within a microfluidic device using a clinically relevant chemotherapy drug. The first experiment consisted of a cell density and drug concentration study to determine …

Chitosan Graphene Composite Fabrication And Characterization For Treatment Of Harmful Algal Blooms And Toxins, Sarah Zetterholm

Master's Theses

Chitosan graphene composites were fabricated and characterized as a management strategy for harmful algal blooms (HABs) caused by various species of cyanobacteria. These chitosan graphene materials were compared to previously studied chitosan graphene-oxide composites in both material properties and HAB treatment. In previous studies, adsorption of the cyanobacteria onto the surface of the composite materials has been observed. Investigations of the pure materials for these composites are also included in this study to determine whether removal is a result of charge interactions with the composite, or as an inherent property of the graphene or graphene oxide. Initial results suggest that …

Media Frames And Abortion Issue Polarization, Shianne Galuska

Master's Theses

The abortion issue is one of the most polarizing topics within the public and media sphere. How the media chooses to frame the abortion debate may influence public opinion and individual reactions. Specifically, articles that use incongruent abortion frames (pro-life/pro-abortion & anti-abortion/pro-choice) may be contributing to an ingroup versus outgroup mentality by highlighting who is the ingroup and who is the outgroup, thus generating moral disgust and polarization (characterized by anger, bias, and activism) amongst those with opposing views. This study sought to answer whether presenting individuals with an incongruent abortion frame increases anger, bias, and activism (polarization), as well …

Racial Bias In Pain Perception And Treatment Among Healthcare Pre-Professionals, Raegan Bishop

Master's Theses

The novel coronavirus has impacted Black Americans who have had higher rates of infection, hospitalization and death compared to White Americans. Although higher rates of obesity and other chronic diseases like diabetes and high blood pressure have been implicated and, likely, play a substantial role in the disparity, racial biases among health care providers that affect the provision of care have yet to be examined. There is some evidence that racial bias among healthcare providers affects pain outcomes among Black American women with healthcare providers prescribing Black women pain medication less often than to White women (Badreldin, et. al., 2019; …

Using Praise To Increase Visual Attending In An Asynchronous Online Learning Environment: An Eye Tracking Study, Andrew J. Rozsa Iii

Master's Theses

With the emergence of online courses in the mid-1990s, the number of students enrolled in online courses has been growing at an exponential rate (Schwirzke, Vashaw, & Watson, 2018). This trend brings with it new problems, such as familiarity with evidence-supported behavioral techniques that will maintain student engagement and improve likelihood of academic success in online learning environments. The purpose of the present study was to examine how the use of praise may affect visual engagement with video lectures with the assistance of commercially available eye tracking technology. A secondary objective of the study was to identify how praise affects …

Examination Of Methylation Status And Occupancy Of Dna Methylation Modifying Proteins On Regulatory Regions Of The Dax-1 Gene, Caroline P. Riedstra

Master's Theses

Epigenetic modifications influence gene expression and thereby play a pivotal role in development and disease. Misregulation and mutations in the DAX-1 gene, or Dosage-Sensitive Sex Reversal, Adrenal Hypoplasia Congenita, Critical Region on the X chromosome, gene 1, have been implicated in Adrenal Hypoplasia Congenita (AHC) and Dosage Sensitive Sex Reversal (DSS). The orphan nuclear hormone receptor DAX-1 is expressed predominantly in tissues such as the testes, ovaries, breast, adrenal cortex, and lung. Critically, DAX-1 may serve as an indicator of aberrant growth in these tissues. Here we hypothesize that DAX-1 is epigenetically regulated, specifically in cancer cells, thereby reducing its …

The Relationship Between Vitamin D Intake, Sun Exposure, Handgrip Strength And Hg Alc Levels In College-Age Adults, Janelle Melancon

Master's Theses

Vitamin D is known for its importance to bone health and calcium metabolism and plays a role in insulin resistance. Recent research has recognized its role in insulin secretion, inflammatory response, and adipose tissue changes as possible reasons for its association with insulin resistance and cardiovascular disease. The CDC (2019) reported that 20% of adolescents are now living with prediabetes. Most individuals with prediabetes progress to type 2 diabetes within ten years. Because many studies have focused on adults of all ages, it is important to research young adults. This study aimed to determine prevention efforts; therefore, the younger adult …

The Role Of Notch1 And Notch3 In Adult Stem Cell Osteogenic Differentiation, John Bradley Cart

Master's Theses

Human adipose-derived stem cells (hASCs) have significant therapeutic potential due to their ability to self-renew, differentiate down multiple lineages, and modulate the immune system. In addition to these many benefits, hASCs boast a minimally invasive harvesting procedure, making them a readily available cell source for stem cell research and tissue regeneration (Ock, et al. 2016) (Abdi, et al. 2008). Despite their broad use, very little is known about the mechanisms that control cell fate.


One way to enhance our mechanistic understanding of differentiation is through the systematic examination of the signaling pathways. The Notch signaling pathway is a highly conserved, …

Take The Lead: Toward A Virtual Video Dance Partner, Ty Farris

Master's Theses

My work focuses on taking a single person as input and predicting the intentional movement of one dance partner based on the other dance partner's movement. Human pose estimation has been applied to dance and computer vision, but many existing applications focus on a single individual or multiple individuals performing. Currently there are very few works that focus specifically on dance couples combined with pose prediction. This thesis is applicable to the entertainment and gaming industry by training people to dance with a virtual dance partner.

Many existing interactive or virtual dance partners require a motion capture system, multiple cameras …

Multi-Assay Nutritional Metabolomics Profiling Of Low Vitamin A Status Versus Adequacy Is Characterized By Reduced Plasma Lipid Mediators Among Lactating Women In The Philippines: A Pilot Study, Catherine M. Johnson

Master's Theses

Background: A significant portion of lactating women in less developed countries have vitamin A (VA) deficiency. Lactation has substantial effects on a mother’s metabolism and VA is known to be needed in multiple biological processes, including growth, vision, immunity, and reproduction.

Objective: The objective of this pilot study was to utilize metabolomics profiling to conduct a broad, exploratory assessment of differences in plasma metabolites associated with low VA status versus adequacy in lactating women.

Methods: Plasma samples from lactating women who participated in a survey in Samar, Philippines, were selected from a cross-sectional study based on plasma retinol concentrations indicating …

Demographic Predictors Of Math Anxiety In Elementary School Children, Melissa Flowerdew

Master's Theses

Due to the increasing interest of math anxiety in elementary level children, the present study explored math anxiety contextual factors through Bandura’s (1999) Social Cognitive perspective. Using the Children’s Anxiety in Math Scale, researchers gathered data from 40 primary-level children to explore four demographic predictors--grade-level, special needs identification, gender identity, and socioeconomic status-- of mathematics anxiety through a hierarchical regression model. Findings indicated demographic variables accounted for over one-third of the variance in math anxiety scores at 38.2% (grade level: 12.3%, SNI: 8.4%, gender identity: 13.2%, SES: 4.1%). With the exception of socioeconomic status, all predictors were significant. These findings …

Subadult Cortical Bone Analysis As An Indicator Of Childhood Health Status Among The Tipu Maya Population, Jaime Thomas

Master's Theses

This thesis explores juvenile health at the contact Maya site of Tipu in western Belize. The associated cemetery was excavated and provided a large and well-preserved population. Although Tipu has been a focus of many studies, few studies have focused on subadults and none on their cortical development, which can allow insight into access to necessary nutritional resources.

Some 108 femora belonging to individuals aged birth to 13 years with femora previously sectioned at midshaft provided the sample. External dimensions taken included diaphyseal length, circumference, medial-lateral diameter and anterior-posterior diameter. Additionally, cortical thickness was measured at four points, and 95 …

An Annotated Bibliography Of Selected Music Theory Resources For The Middle And High School Choral Classroom With Alignment To Mississippi College- And Career-Readiness Standards, Amanda M. Brandon

Master's Theses

Middle and high school choral ensembles often struggle to produce musicians who are proficient in music theory skills; however, music theory and ear training skills provide numerous benefits to the student and ensemble. Promoting and fostering theory and ear training skills develop a student’s overall musicianship – thus, strengthening sight-reading skills– further leading to more accurate sight reading, using less rehearsal time, and the option of learning more, or even more technically challenging, literature. Additionally, developing independent musicianship skills encourages higher order and critical thinking in the choral classroom.

This project will examine and review selected music theory and ear …

Population Parameter Estimation And Stable Isotope Analysis Of Gulf Sturgeon (Acipenser Oxyrinchus Desotoi) In The Pascagoula River, Alfonso Cohuo

Master's Theses

Gulf Sturgeon (GS), Acipenser oxyrinchus desotoi, are a threatened, anadromous fish species in the northern Gulf of Mexico. Their range is from the Pearl River, LA, in the west to the Suwannee River, FL, in the east with a longitudinal divide at Mobile Bay, AL, creating a western population unit (WPU) and an eastern population unit (EPU). Sturgeon belonging to the WPU exhibit lower abundances, higher mortality rates, and are overall less studied than their EPU counterparts. Notable data gaps for the WPU includes the absence of recent population parameter estimations and confirmed feeding habitat. My thesis aims to …

Long Term Recovery From Cattle Grazing Disturbance And Climate Impacts At Capitol Reef National Park, Utah, Erin Tessens

Master's Theses

Cattle grazing has influenced the environment in the western United States since European settlement in the 1800’s. Continuous and heavy grazing on arid and semi-arid rangelands has resulted in decreased biodiversity, changes in vegetation structure, and vulnerability to exotic plant invasion. Heavy grazing has also been linked to decreased cryptobiotic soil due to trampling and susceptibility to erosion. With a lack of effective means of successful habitat restoration, there is a rising concern among land managers to maintain these intricate systems, notably under the threat of climate change. Consequently, there is a critical need to understand these system’s response to …

Noninvasive Measurement Of Arterial Compliance With A Blood Pressure Cuff Using A Surrogate Arm Bench Top Model For Oscillometric Use, Shane Wilsey

Master's Theses

A surrogate arm model was created that is capable of being used for oscillometry. This model is capable of being used as a bench top model for blood pressure cuff devices. The arm consists of endplates and internal supports that are 3D printed with ABS, a silicone rubber outer sleeve, and interchangeable arteries made from two silicone rubber strips glued together at the edges. The interchangeable arteries have varying compliances that can be used as different inputs for oscillometric testing. A process was established to measure the artery compliances with a curve fit correlation of 0.95. However, testing revealed that …

“Precios Perle Wythouten Spotte”: Accepting The Unknowable In Pearl, Jana Ishee

Master's Theses

The fourteenth-century Middle English poem Pearl, authored by the anonymous Pearl-poet, survives in a manuscript known as London, British Library, Cotton MS Nero A.x. This dream vision, narrated by a grieving father, tells the story of his journey to Paradise, where he encounters his infant daughter, now older, regal, and wise, proffering admonishments with the authority of God to her tearful father. meeting with her in Paradise. Drawing on Caroline Walker Bynum’s work on medieval European conceptions of death and resurrection, J. Stephen Russell’s work on the dream vision genre, and Karl Steel’s work on oysters as liminal figures, …

Characterization Of The Bacterial Microbiome Of Exotic Tick Species Collected From Migratory Birds, Raima Sen

Master's Theses

Migratory birds often serve as natural/accidental hosts to ectoparasites like ticks (predominantly immature stages) and are known reservoirs of several pathogens transmitted by ticks. Parasitizing these birds, exotic tick species often hitch rides to non-native ecological niches, bringing along tick-borne pathogens. This study aims to profile the bacteriome of exotic tick species flying in and out of the US from the Neo-tropical South. A total of 421 tick samples comprised of several different tick species were collected off migratory songbirds at sites north of the Gulf of Mexico (Louisiana State). A 16S rRNA metagenomic multiplexed sequencing approach was used to …

Matching Equation: Teacher Rates Of Praise And Reprimands, Meleah Ackley

Master's Theses

Previous matching equation literature has demonstrated variability in student behaviors matching onto available reinforcement rates. While some studies have found that student on-task behaviors matched contingent teacher attention around half the observations (Martens et al., 1990), other studies have found that first grade students’ on-task behavior matched contingent teacher attention more than half of observations (Shriver & Kramer, 1997). However, no studies in the current literature have used teacher behaviors as the primary dependent variables (i.e., B1 and B2 in the matching equation). The current study sought to extend the Generalized Matching Equation (GME) further into the classroom, given the …

Design, Synthesis, And Characterization Of Glycodendrons Through Small Molecule And Linear Polymer Models, Molly Jones

Master's Theses

This thesis focuses on the design, synthesis, and characterization of glycopolymer-dendron thiol-ene coupling reactions with the long-term goal of increasing biocompatibility of near infrared (NIR) fluorophores for bioimaging applications. A design of experiments was used with small molecule model compounds to determine the parameters for successful thiol-ene click reactions that would lead to success of more complicated amphipathic polymer-polymer coupling reactions. The first chapter provides an introductory overview of the importance and applications of glycopolymers, bioimaging, and Janus dendrimersomes. The second chapter presents the synthetic methods for creating a glucose-functionalized glycopolymer with an acrylamide backbone, the exploration of thiol-ene coupling …

Comparison Of Animal Versus Plant-Based Protein Supplementation To Nitrogen Balance In Female College Students, Adeline Maykish

Master's Theses

Plant-based diets have become popular in the past 10 years, with approximately 11% of Americans self-identifying as vegan or vegetarian, and many others trying to reduce meat consumption. Due to this increasing interest, the plant-based food market has exploded with several novel innovative products serving as alternatives to animal-based products. One such example is almond protein powder, a fairly new protein supplement created as an alternative to whey protein. A number of studies have compared animal-based protein supplementation, such as whey to plant-based supplementation, such as soy, on muscle protein synthesis and skeletal muscle preservation. Due to the novelty of …

Urban Agroecology For Food Sovereignty And Biodiversity: Are Urban Community Farms Or Gardens More Effective?, Heidi L. Giancola

Master's Theses

Industrial agriculture is accurately criticized for eliminating biodiversity and destroying food sovereignty. Urban agroecosystems, usually individual plots in community gardens, are promoted to restore ecological services and equity to food systems. Recently, collectively tended urban community farms have developed, with explicit social justice goals. This study directly contrasts the effectiveness of the urban community farm and garden models. Spatial analysis is used to confirm that community farms enhance geographic access for healthy food priority areas compared to gardens in the San Francisco bay area. An online survey of farm staff and gardeners from Marin to Santa Clara County resulted in …

Exploring Racial Injustice Conversations In Intergenerational Asian American Households Following The Death Of George Floyd: A Case Study, Jasmine Nicole Lopez Itliong

Master's Theses

This study explores intergenerational racial injustice conversations in Asian American households by focusing on conversations that occurred following the death of George Floyd. Asian American historical oppression, Eastern versus Western ideologies, and intergenerational communication conflict present several challenges for navigating conversations about racial injustice among family members. Given the important role of family in facilitating identity and fostering support, this study also considers the implications of mental health and well-being of Asian Americans associated with their ability to communicate about racial injustice. Informed by Racial Triangulation Theory and Family Communication Patterns Theory, four in-depth interviews were conducted, along with a …

Distribution And Habitat Use Of The Santa Clara County Population Of Red-Bellied Newts (Taricha Rivularis), Joie De Leon

Master's Theses

Anthropogenically-induced habitat loss and degradation have increased extinction rates in amphibians worldwide, yet little is known about many remaining populations. A disjunct population of red-bellied newt (Taricha rivularis), an endemic California species, was discovered 130 km south of its previously known range. Here I document the range and breeding phenology of this population and contrast its mesohabitat use with that of other sympatric newts. Surveys across two years suggest that the southern population of T. rivularis is confined to a 1 km segment of Stevens Creek, and the population follows an early-March to late-April migratory breeding pattern, similar to one …

The Relationship Between Different Forms Of Exercise And Adhd Symptomatology, Matthew A. Reynolds

Master's Theses

Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder associated with executive function deficits as well as negative life outcomes in both childhood and adulthood. Current treatments to reduce symptoms of ADHD include stimulant medications that act as catecholamine agonists. These medications often cause undesirable side effects, to which end better understanding the effects of non- pharmacological treatments on symptoms of ADHD is critical. Research conducted in children suggests that exercise may be an effective tool for symptom reduction. However, the relationship between exercise and ADHD symptoms remains unclear for adults. The aim of this study was to address this …

Humpback Whale, Megaptera Novaeangliae, Feeding Dynamics From The Perspective Of The Individual: Insights From Demography, Life History, And Bio-Logging, Jennifer Tackaberry

Master's Theses

Studies of fission-fusion societies provide a framework in which to compare the feeding dynamics across demographics, unrestrained by stable associations or relatedness. This study used bio-logger data and surface observations combined with long-term population data from the Gulf of Maine humpback whale, Megaptera novaeangliae, population to investigate the influence of demographics on feeding methods, and time spent feeding, and to determine if a coordinated feeding method, kick-feeding, was a cooperative behavior. The results suggest that demographics did influence the feeding method used and highlighted the need to determine how energetic needs change across the feeding season. Adult females did not …

Hook-Billed Kite, Chondrohierax Uncinatus, Southbound Autumn Migration In Belize And Mexico, Ryan Anthony Phillips

Master's Theses

The Hook-billed Kite (Chondrohierax uncinatus) is a specialized Neotropical raptor with a wide distribution that has received little research attention. The species is considered non-migratory across most of its distribution, but there are scattered records of Hook-billed Kite migration. The present research describes, for the first time, the largest southbound autumn migration of Hook-billed Kite in Belize and Mexico and evaluates the effects of environmental conditions on this phenomenon. Eight years of count data were collected in Belize and 25 years in Mexico. During a total of 3093.1 count hr from 2013-2020 in Belize, 39928 Hook-billed Kites were counted on …