Digital Commons Network^™

Effect Of Sex On The Accumulation Of Hepatic Mercury In Mallards Wintering In Louisiana, Latorya E. Mason

Master's Theses

The increase in mercury production through anthropogenic activities has led to a global crisis of mercury pollution that poses a significant threat to the health of both humans and wildlife. Aquatic ecosystems are especially at risk due to the creation of methylmercury, a toxic form of mercury, by sulfate-reducing bacteria in anoxic sediments and soils. Methylmercury enters the food chain where it bioaccumulates in individual organisms and then biomagnified with increasing trophic level. Aquatic birds are useful bioindicators of many pollutants, including mercury, due to their abundance and position in the food chain. Previous studies have primarily focused on mercury …

Comparing Proliferation Rates And Collagen Production Of Cells Treated With Cuhars, Katie Elizabeth Mckenzie

Master's Theses

Cartilage is the padding in joints that protects the bones and aids in motion. Problems with the cartilage in the knee can be caused by mechanical damage or diseases like osteoarthritis. Chondrocytes make cartilage. The objective of this study is to determine the doubling time of chondrocytes per passage. I also want to determine the base amount of collagen-II created by chondrocytes as they age. I also want to determine how long it takes CuHARS to break down in different cell medias. Chondrocytes, human dermal fibroblasts, and CRL 2303 cells were grown and cultured for over a year. During that …

Exploring The Learning Outcome Of A Financial Literacy Game, Stanley Yip

Master's Theses

The financial literacy game was part of a financial literacy intervention that was conducted in Karnataka, India. Rural women participated in playing the game for four weeks. Using a fixed effects model at the subject level, the game was measured by three outcomes. These outcomes consist of the rate of type one errors, type two errors and the rate of going bankrupt that could occur for players when playing the financial literacy game. With type one errors, we find that adding one more unit on the return on investment (roi) would lead to about a 1.59 percent decrease in type …

Financial Literacy And Aspirations: Experimental Evidence From Eastern Uganda, Ester Agasha

Master's Theses

Financial literacy and the cultivation of aspirations are pivotal in empowering individuals and fostering economic growth, particularly within disadvantaged com munities. Although prior research has extensively analyzed the individual effects of financial education and motivational interventions on economic behaviors, there is less clarity on how the synergy between them can collectively impact the socioe conomic status of individuals in developing economies, especially women. Through randomized control experiment(RCT), this study explored the effectiveness of two interventions; 1) a financial literacy digital gaming application and, 2) an aspirations intervention (a short video documentary and a follow-up curriculum) in not only enhancing financial …

Can Aspiration And Financial Literacy Interventions Relieve Internal Constraints? Evidence From Uganda And India, Veronika Divis

Master's Theses

Can aspiration and financial literacy interventions relieve internal constraints? We address this question through a novel experiment in Uganda and India, using 617 participants in 89 already existing borrowing groups of microfinance institutions. We carry out aspiration and financial literacy treatments as well as a combined treatment group which received both treatments to measure effects on aspirations, hope, agency, and pathway indices. Results show that receiving the aspirations treatment led to 0.34, 0.42, 0.18, and 0.40 standard deviation increases in aspirations, agency, pathways, and aspirational hope, respectively. The game and combined treatment groups also showed positive effects but lacked statistical …

Using Virtual Power Plants To Advance Decarbonization And Energy Equity In California, Cheri Tsoi Yu Tse

Master's Theses

To achieve 60% renewable electricity generation by 2030 and 100% zero-carbon electricity by 2045, California must rapidly electrify and decarbonize all sectors while ensuring grid stability to avoid power outages. Virtual power plants (VPPs) are an emerging solution that can help increase the percentage of renewable energy on California’s electrical grid. This research examined how VPPs can advance decarbonization, grid stability, and energy equity in California. The report begins by clarifying the definitions and components of a VPP, finding the crucial interactions among distributed energy resources (DERs), management systems, and prosumers (energy consumers who both produce and consume electricity). Next, …

The Investigation Of The Reaction Of 2,3-Dimethylfuran With O(³P) And The Estimate Of The Photoionization Cross Section Of C-Cl And Absolute Photoionization Cross Sections Of Chlorinated Organic Compounds, Yilan Lori Chen

Master's Theses

The work presented in this thesis focuses on gas-phase reactions, which are fundamental for reducing greenhouse gas emissions and mitigating climate change. The experiments are performed at the Advanced Light Source (ALS) of Lawrence Berkeley National Laboratory, where there is a time-of-flight mass spectrometer coupled with tunable synchrotron radiation at Beamline 9.0.2 to collect high-quality data.

Chapter 1 details the background and purpose of each project, along with an overview of the origins of synchrotron radiation and time-of-flight mass spectrometry. The adaptation of biofuels is a way to minimize carbon emission and air pollutants, so research surrounding the reaction dynamics …

Patterns And Potential Mechanisms Of Phenotypic Changes In Urban Small Mammals, Leslie Lopez

Master's Theses

Urbanization is an example of human induced rapid environmental change that can have wide-reaching ecological effects, including habitat destruction, fragmentation, and alteration of local climates. Effects of urbanization have been shown to impact wildlife, as disturbances resulting from urbanization can create novel environments and selective pressures that could lead to changes in morphology, physiology, or both. Small mammals such as rodents are an ecologically important set of wildlife species because they are a key prey item for several predators, hold strong influence over plants as a primary consumer, and some species carry and transmit major human and animal diseases. Previous …

Chemical Extraction Of Non-Exchangeable Radiocesium From Fukushima Soils Using Ion-Exchange And Selective Precipitation, Ian Danquah

Master's Theses

The Fukushima Daiichi Nuclear Power Plant meltdown in Japan resulted in the release of radionuclides into the environment. Soil in neighboring prefectures has been reported to be among the most contaminated. Since the event in 2011, a large volume of soil has been collected and stored in temporary storage facilities, awaiting decontamination. Numerous methods have been used and employed to remediate these soils, but most methods do not achieve the 90% removal target set by the Japanese government for safe disposal. Among all reported methods, the ion-exchange technique has been reported to be cost-efficient and effective. A study by Tamura …

Soil Bacterial Community Shifts In A Montane Longleaf Pine Restoration Site: Effects Of Dominant Herbaceous Species Removal, Prescribed Burn, And Changes In Season, Isabella K. Vahle

Master's Theses

Longleaf pine (Pinus palustris Mill.) ecosystems are one of the most endangered and ecologically diverse systems in North America. The native herbaceous species serve as fuel for low-intensity, recurring fires this system relies on. The herbaceous species play major roles in maintaining ecosystem structure and diversity. Soil microorganisms like bacteria are known to aid greatly in many different plant and ecosystem processes. However, little is known about the dominant herbaceous species and soil bacterial compositions within montane longleaf pine ecosystems, especially before and after a prescribed fire. We completed a multiyear, seasonal analysis of the soil bacterial community in …

Evaluating The Effect Of Noise On Secure Quantum Networks, Karthick Anbalagan

Master's Theses

This thesis focuses on examining the resilience of secure quantum networks to environmental noise. Specifically, we evaluate the effectiveness of two well-known quantum key distribution (QKD) protocols: the Coherent One-Way (COW) protocol and Kak’s Three-Stage protocol (Kak06). The thesis systematically evaluates these protocols in terms of their efficiency, operational feasibility, and resistance to noise, thereby contributing to the progress of secure quantum communications. Using simulations, this study evaluates the protocols in realistic scenarios that include factors such as noise and decoherence. The results illustrate each protocol’s relative benefits and limitations, highlighting the three-stage protocol’s superior security characteristics, resistance to interference, …

Primate Social Behavior And Embodied Action, Maria Elbon

Master's Theses

The evolutionary origins of uniquely human cognitive processes remain poorly understood. Comparative analysis between humans and great apes can help identify derived characteristics and extrapolate ecological conditions leading to the evolution of specifically human cognitive abilities. It has been posited that the relatively large brain size of primates, in relation to body size, evolved in response to increasing social complexity and the accompanying cognitive demands placed on gregarious organisms that need to maintain cohesive, functional groups. Studies examining primate social behavior and cognition have focused on foundational abilities and cognitive capacities that are theorized to act as progenitors to uniquely …

Regulation Of Intracellular Sorting Of The Bruno Protein In Drosophila Flight Muscles, Travis Main

Master's Theses

Understanding mechanisms of intracellular sorting is a fundamental inquiry of cell biology. We used the B-body and protein Bruno (Bru) as a model to study the formation of nuclear domains that are membraneless organelles inside the cell nucleus. Specifically, we sought to identify protein sequences that regulate Bru's affinity to B-bodies and protein aggregation. We generated various Bru mutants and subsequently tested them in vivo using fluorescence microscopy. We found that the protein solubility of Bru is determined through an interplay of RNA recognition motifs (RRMs) and intrinsically disordered regions (IDRs). Using truncation analysis, we identified a 31-amino acid region …

Gender Stereotypes In The Elementary Classroom, Mckenna Gill

Master's Theses

This study explores ways to reduce gender stereotypes in the elementary classroom. Specifically, it was designed to collect data on male and female behaviors related to gender stereotypes toward different school subjects, volunteering, peer relationships, and student redirections during lessons. A literature review was conducted to investigate existing research on this topic. A mixed-methods design was used in this study. Data was collected in a fifth-grade classroom, by keeping a tally of each of the subject areas Math, Reading, Science, and Writing, and the students who volunteered. Included in the investigation was a teacher interview regarding her thoughts on gender …

The Impact Of Online Tools On Student Writing, Rebekah Probst

Master's Theses

Our classrooms today are vastly different from those just a few years ago. Many students are foreign to learning without any technology. In light of this drastic change in our classrooms, it is important to understand the new age's impacts on our students and their learning abilities. This research study used a mixed-methods design to explore online tools' effects on student writing. The research examines data collected from a fifth grade over two months, which included student writing samples and survey responses. This research compared outcomes between handwritten responses and those with access to tools such as automatic correction features. …

Key Benefits Of Small Group Instruction For Diverse Learners, Lydia Mcevoy

Master's Theses

Utilizing a mixed method approach this research study investigated the effects of small group instruction on the learning of diverse learners. Informed by a preliminary literature review that supports the use of small-group instruction, the researcher conducted a small-scale action research project to focus on three diverse learners in a 1st-grade classroom over four weeks. One of the findings of this project shows that small group instruction helps promote social and emotional skills as students feel more comfortable interacting with peers in a small group rather than in a whole group. Another finding indicates that students feel more encouraged by …

The Mathematics Of Financial Portfolio Optimization Incorporating Environmental, Social, And Governance Score Information, Ian Driskill

Master's Theses

We numerically investigate the effects that Environmental, Social, and Governance (ESG) scores have on portfolio optimization with Modern Portfolio Theory assumptions and how ESG scores correlate with the market returns of a rated company's stock. Additionally, we review and analyze a research paper published in the Journal of Financial Economics regarding ESG investing titled “Responsible investing: The ESG-efficient frontier” by Pedersen, Fitzgibbons, and Lukasz. Our overall goal is provide insight for socially responsible inclined investors, to help them understand what ESG scores tell us and how those scores may effect their overall investment returns."

Analysis Of Social Behavior Of The African Great Apes During Feeding And Non-Feeding Contexts, Jessica Hale

Master's Theses

The three African great apes, bonobos, chimpanzees and gorillas, despite similar habitats, differ considerably in their sociality and feeding ecology. There have been many studies that have investigated the feeding ecology and social behaviors of these species, but there is extremely limited literature available on how feeding ecology may have affected ape social evolution. Chimpanzees are frugivorous, which forces them into close proximity when foraging given the clumped nature of this resource. Bonobos and gorillas, however, are fallback food consumers, which allow them to spread out as they forage. This thesis project aims to test the hypothesis that differences in …

An Analysis Of Resources For Developing Music Curriculum In Charter Schools With Proposals For Research Instruments Specific To The State Of Arizona, Emily Stanton

Master's Theses

A robust music curriculum is the foundation for a successful music program. With school choice becoming more prevalent, parents who prioritize musical education for their children need information about the quality of the music curriculum in all school models, including charter schools. Currently, little data is available about music programs in charter schools. This document seeks to address that lack of information with a focus on charter schools in Arizona. There were no participants involved in this research. All proposed questions have not been used for research purposes at this time and are used as examples of options for future …

Cost-Risk Analysis Of The Ercot Region Using Modern Portfolio Theory, Megan Sickinger

Master's Theses

In this work, we study the use of modern portfolio theory in a cost-risk analysis of the Electric Reliability Council of Texas (ERCOT). Based upon the risk-return concepts of modern portfolio theory, we develop an n-asset minimization problem to create a risk-cost frontier of portfolios of technologies within the ERCOT electricity region. The levelized cost of electricity for each technology in the region is a step in evaluating the expected cost of the portfolio, and the historical data of cost factors estimate the variance of cost for each technology. In addition, there are several constraints in our minimization problem to …

The Effects Of Amphibole- And Sulfide-Producing Melts On Crustal Strength In Gabbros Of Lower Oceanic Crust In Oceanic Core Complexes, Mid-Atlantic And Southwest Indian Ridges, Trevor Hoffmann

Master's Theses

This study investigates gabbro-cored oceanic core complexes in the slow-spreading Mid-Atlantic Ridge (MAR) and the ultraslow spreading Southwest Indian Ridge (SWIR). Dikelets are a texture found in thin section samples from these systems that form as a result of crystal-plastic deformation. Thin section samples from the Atlantis Massif, MARK Area, and 13˚-15˚ North of the MAR and the Atlantis Bank of the SWIR were observed with petrography to find these dikelets and identify what type of dikelet is present. SEM-EDS is used to identify the mineral assemblages present in the dikelets. LA-ICP-MS is used on amphibole to determine if its …

Molecular Characterization Of Stress Response In Western Honey Bee (Apis Mellifera), Faizan Tahir

Master's Theses

Honey bees are incredibly important for the reproduction of flowering plants and the sustainability of agricultural ecosystems. However, they face various stressors such as pesticides, pathogens, habitat loss, and climate change. Extensive research has been conducted to understand how bees respond to these stressors. Scientists have discovered that honey bees exhibit complex physiological and behavioral responses to stress at individual and colony levels. Stress can have a significant impact on their immune function, foraging behavior, and reproductive success (Decourtye et al., 2010). Understanding bee responses to stress is crucial for several reasons. Firstly, honey bees are vital for the pollination …

3d Analysis Of Fe-Ti Oxides And How They Affect Crystal-Plastic Deformation In Atlantis Bank, Southwest Indian Ridge, Sarah Hill

Master's Theses

This project focuses on the importance of the relationship between Fe-Ti oxide abundance and interconnectivity, and crystal-plastic deformation in Atlantis Bank, Southwest Indian Ridge by utilizing Micro-CT scanning. This was done through comparing the Micro-CT scans of 15 samples from three different Ocean Drilling Program and International Ocean Discovery Program drill holes using the Nikon NIS Advanced Research 3-D visualization program and producing plots and statistics from MATLAB. Results indicate a wide range of textures across a range of crystal-plastic fabric intensity and Fe-Ti oxide abundance. Ultimately, there was a generally positive relationship between depth, CPF intensity, and Fe-Ti oxide …

Satellite Image Analysis And Sidewalk Classification Using Deep Learning Models, Subeksha Khanal

Master's Theses

Lack of sidewalk pavement can contribute to pedestrian fatalities and injuries in the USA. Although many researchers have conducted research on sidewalk detection, there are not many publicly available datasets that we would work on for sidewalk classification. In this study, I conducted classification tasks using pretrained CNN models including VGG16 and ResNet50. I extended these models by adding custom layers at the top of pretrained layers, employing various techniques to improve the classification accuracy.

The dataset comprises 4,731 images of sidewalk based on occlusion levels, including images where the sidewalk is visible from overhead and instances where sidewalk is …

N-Methylation Of Amphetamine By Phenylethanolamine N- Methyltransferase: Implications For Chronic Therapeutic Use, Mackenzie Pavlik

Master's Theses

In current forensic analysis, the presence of methamphetamine in a sample is routinely presumed to reflect methamphetamine abuse. This is due to the expectation that individuals either abusing, or receiving amphetamine for therapeutic purposes (e.g. as treatment for ADHD) will not generate any significant levels of methamphetamine as a product of metabolism. We have hypothesized however, that because amphetamine can serve as a substrate for methylation by phenylethanolamine n-methyltransferase (PNMT), (which will be in equilibrium with the reverse demethylation reaction) some individuals chronically taking amphetamine for therapeutic purposes may generate low levels of methamphetamine that would show up on a …

Semantic Segmentation Of Point Cloud Sequences Using Point Transformer V3, Marion Sisk

Master's Theses

Semantic segmentation of point clouds is a basic step for many autonomous systems including automobiles. In autonomous driving systems, LiDAR sensors are frequently used to produce point cloud sequences that allow the system to perceive the environment and navigate safely. Modern machine learning techniques for segmentation have predominately focused on single-scan segmentation, however sequence segmentation has often proven to perform better on common segmentation metrics. Using the popular Semantic KITTI dataset, we show that by providing point cloud sequences to a segmentation pipeline based on Point Transformer v3, we increase the segmentation performance between seven and fifteen percent when compared …

Investigation Of Surface Chemistry From Electron Irradiation Of Synthetic Schreibersite, Tyler Davis

Master's Theses

While phosphorus is one of the key elements for life on Earth, it has relatively low abundance in extraterrestrial environments, making it a target for astronomers and astrobiologists interested in the possibility of life beyond our planet. Schreibersite (Fe,Ni)₃P is one of the first P-containing minerals to condense during planetary cooling and one of the primary P-containing minerals in iron and stony-iron meteorites. Therefore, it is a likely P-bearing mineral in cometary cores and dust grains within the interstellar medium and circumstellar envelopes. Experiments in this project were performed with the aim of observing the formation of small …

A 2-D Numerical Model For Evaluating Daylight Penetration In Short Tunnels For Enhanced Driver Safety, Joachim James

Master's Theses

It is commonly assumed that daylight will adequately penetrate short tunnels, leading to the misconception that artificial lighting is unnecessary during the daytime. Past studies revealed higher frequency of crashes in short tunnels and despite that there is lack of national guidelines warranting artificial lighting for short tunnels. Inadequately lit tunnels pose safety risks, while excessive lighting can be costly. Hence, it becomes crucial to investigate the extent of daylight penetration in short tunnels and identify disappearance zones within these tunnels. This research can help determine the necessity of artificial lighting, and which specific areas of the tunnel require lighting. …

Characterizing The Ecological Impacts Of Utility-Scale Solar Energy (Usse) On Fallowed Farmland, Amanda Gersoff

Master's Theses

Large-scale carbon-free energy generation projects such as utility-scale solar energy (USSE) arrays help mitigate the energy sector’s contribution to climate change and are rapidly expanding throughout the U.S. However, the expansion of USSE sites is associated with immediate and longer-term ecological impacts, many of which have yet to be assessed. Quantifying the ecological impacts of USSE arrays will help to identify synergies and trade-offs between energy generation and terrestrial conservation goals. The overall goal of this research is to characterize the ecological impacts of USSE sites located on fallowed farmlands in San Luis Obispo County, California in a seasonally explicit …

Modulation Of Optoelectronic Properties Of Electron Rich Pyrrolopyrroles Via Peripheral Alterations, Lillian Daniel

Master's Theses

Understanding structure-property relationships of π-conjugated chromophores based on peripheral functionalization is important for the continued development of various organic electronic applications. 1,4-Dihydropyrrolo[3,2-b]pyrroles (DHPPs) are synthetically simple chromophores with tailorable optical and electrochemical properties based on the functionalities of the starting materials. The overarching goal of this thesis is to understand how peripheral functionalization strategies enable distinctly different optical and electrochemical properties that may be useful for various applications. Motivated by the synthetic simplicity and tunability of DHPPs, molecules with varying design motifs were synthesized to exhibit how functionality influences optical and electrochemical properties. First, two molecules with varying …