Digital Commons Network^™

Coralai: Emergent Ecosystems Of Neural Cellular Automata, Aidan A. Barbieux, Aidan A. Barbieux

Master's Theses

Artificial intelligence has traditionally been approached through centralized architectures and optimization of specific metrics on large datasets. However, the frontiers of fields spanning cognitive science, biology, physics, and computer science suggest that intelligence is better understood as a multi-scale, decentralized, emergent phenomenon. As such, scaling up approaches that mirror the natural world may be one of the next big advances in AI. This thesis presents Coralai, a framework for efficiently simulating the emergence of diverse artificial life ecosystems integrated with modular physics. The key innovations of Coralai include: 1) Hosting diverse Neural Cellular Automata organisms in the same simulation that …

Effects Of Temperature On Economic Preferences: A Cross-Cultural Laboratory Study Of Prosocial Behavior, Nikita Tkachenko

Master's Theses

In light of the pressing issue of climate change, our study investigates the implications of rising temperatures on social and economic behaviors through a laboratory experiment conducted among students at university sites in Mexico, India, Kenya, Colombia, and the United States. This paper examines the influence of temperature differences and exposure length on economic decision-making among students at university sites in Mexico, Kenya, and the United States. Analyzing data from the dictator game, we explored how temperature, both ambient and wet bulb, and session length affect prosocial behavior. Our results suggest a link between temperature measures and prosocial behavior, with …

Habitat Characterization Of American Badgers (Taxidea Taxus) Of Northern California, Mitchell Victoria

Master's Theses

American badgers (Taxidea taxus) are a semi fossorial mammal that lives in grassland and open prairie ecosystems as well as coastal prairies, agricultural fields, deserts, and deforested habitats. Many researchers have published work on badgers, but we still require more information on their ecology. The American badger is a semi fossorial, solitary, predatory mammal of grassland ecosystems. They are classified as mesopredators when compared to larger apex predators such as brown bears, wolves, and pumas. However, when larger carnivores are absent, Badgers become apex predators of their ecosystems. Los Vaqueros Watershed in Brentwood, California, was my study site because badgers …

Determining Best Diet And Temperature Regime Of Monkeyface Pricklebacks (Cebidichthys Violaceus) For Aquaculture, Luke C. Townsend

Master's Theses

Wild freshwater eel populations are threatened due to overfishing and habitat degradation. Attempts to use aquaculture to close the eel life cycle have yet to be commercially adapted, owing largely to their complex lifecycle. Monkeyface pricklebacks (Cebidichthys violaceus) are intertidal fish that may serve as an alternative species for freshwater eels in aquaculture, as they possess several beneficial characteristics. This study aimed to optimize diet and culture temperatures to maximize monkeyface prickleback cultures by measuring growth, condition, metabolic rates, fillet composition, and critical thermal maximum (CTmax) of juvenile fish that were reared in two separate experiments: (1) on four different …

Use Of A California Wetland: Harbor Seal (Phoca Vitulina) Haul-Out Patterns In Elkhorn Slough, Emma Nicholson

Master's Theses

This project investigated small-scale habitat use patterns of harbor seals (Phoca vitulina). The goals were to provide an updated overview of the harbor seal population in Elkhorn Slough, California, USA, identify haul-out areas that are seasonally relevant for pupping and molting, and analyze environmental factors that may influence the harbor seals’ abundance and distribution in the slough. Seal counts were conducted by Elkhorn Slough volunteers throughout the entire slough June 2020-May 2023. Additional survey data at the 5 most populated haul-out sites were collected by volunteers from MLML April 2022-May 2023. A comparison to harbor seal abundance data from 1991-1992 …

Unveiling The Cognitive Impact: An Exploratory Study On Food Insecurity And Value-Driven Attentional Capture, Nichole S. Hogoboom

Master's Theses

Food insecurities have been shown to lead to serious negative health outcomes such as increased risk for diabetes and obesity in adulthood, food-related mental health and behavioral issues, all of which can have a crossover effect in many areas of a person’s life. This experiment explores whether previous history of food insecurity is associated with how people allocate attention to pictures of food; whether they are prioritizing or ignoring food stimuli in their environment. We hypothesized that the severity of food insecurity experienced in childhood would correlate with attentional bias towards food images, and that how hungry or thirsty participants …

Synthesizing Physiology With Aquaculture For Olympia Oyster Restoration In Elkhorn Slough, Ca, Jacob Harris

Master's Theses

Conservation aquaculture is an emerging restoration strategy for depleted and low-density foundation species. It was recently applied for Olympia oysters in California. The only native oyster species is at risk of local extinction in much of its range. Conservation aquaculture can support oyster abundance, but long-term restoration success will be constrained by habitat conditions that suppress early growth and reproductive fitness. Following years of reproduction failure in Elkhorn Slough, CA, we examined these two critical life stages: juvenile and brooding. Our aim was to improve restoration by evaluating aquaculture methods and studying their physiology. We tested site parameters, oyster size, …

Optimizing Field-Linked Simulations Of Dry Season Uptake And Monsoon Infiltration Within An Aspen-Mixed Conifer Forest, Raymond J. Hess

Master's Theses

Climate models forecast that headwater catchments in the western U.S. will undergo a reduction in snowpack, early season snowmelt, and increases in evapotranspiration. The resulting extended dry season will stress vegetation in mountainous watersheds throughout the Upper Colorado River Basin. We investigate infiltration patterns and root water uptake in response to dry season disturbances within the East River watershed in Colorado. To do this, we collected soil cores, measured matric potential and sap flow, and monitored tree xylem and soil for stable isotopes of water (2H, 18O) in two soil profiles to 90 cm depth (with three Engelmann spruce and …

Parental Beliefs About Mental Health And Available Support, Michele O'Geare

Master's Theses

This study adds information to the field by investigating the relationship between parental beliefs about mental health and the services they use to support their child’s mental health issues. The study targeted 224 parents from a private K-12 school in the Midwest. The school was selected because of the many students from diverse backgrounds. This study does not intend to influence parental beliefs but investigates ways families seek support for their children. Descriptive statistics like mean and standard deviation were combined to analyze quantitative data used to interpret parents’ beliefs toward mental health and the use of specific mental health …

Descriptive Study Of Adult Male Acheta Domesticus Phonotaxis, Dana Husana

Master's Theses

The phonotactic behavior of male Acheta domesticus has not been described at length. The present study evaluates the phonotactic responses of male A. domesticus in relation to age. Male crickets of different ages (young and old) were exposed to calls with attractive and non-attractive syllable periods for this species. Both age groups exhibited phonotaxis but did not show a preference towards the attractive call over the non-attractive ones. No significant relationship was found between age and phonotactic response. Additionally, no significant differences were observed between age and preferred syllable period. Acoustic responses were also observed in some of the older …

The Role Of Nature As A Protective Factor In Father-Child Relationships, Sarah J. Barker

Master's Theses

The present study strived to understand how fathers spend time with their children outdoors and how this shared time together may positively influence their relationship within the Family-Based Nature Activities Theoretical Framework. The objectives of this thesis are to understand more about (a) Why fathers participate in outdoor activities with their children; and (b) How spending time outdoors with their children influences their relationship. Participants included 26 fathers (M=40.6 years old) and their children between the ages of 5-12 years old. All urban fathers resided on the West Coast, while rural fathers lived in the southeast United States. Participants were …

Covalent Inhibition Of Enzyme Sortase A As A New Pathway Against Bacterial Resistance Of Staphylococcus Aureus, Umyeena Bashir

Master's Theses

The continued rise of antibiotic-resistant bacteria, such as MRSA (methicillin-resistant Staphylococcus aureus), has made the discovery of novel antibiotics critical. While bacteriostatic and bactericidal antibiotics inevitably exert evolutionary pressure on bacteria to develop resistance, small molecules that target mechanisms of bacterial virulence present a promising alternative for treatment. Sortase A (Srt A), a cysteine protease of S. aureus, promotes bacterial virulence by covalently attaching proteins such as pilin to the bacterial surface, enabling bacterial adhesion to mammalian cells. Inhibitory studies of this enzyme have gained prominent interest as a new pathway for drug development since blocking this enzyme's ability to …

Heat & Social Cooperation: The Effects Of Thermal Stress On Altruism, Alexander J. Courtman

Master's Theses

Recent literature has highlighted the effects of temperature on economic outcomes and violence in humans, on both the interpersonal and intergroup levels: as temperatures rise, humans are more likely to exhibit increased aggression and agitation. However, little research has been done on how pro-social behaviors like cooperation and altruism among humans might respond to increased temperatures. As extreme heat events increase in frequency, will humans and communities work together in the face of adverse shocks and crises? Leveraging experimental data collected randomized controlled trails held in 4 locations across the world, this paper seeks to establish a relationship between thermal …

The Impact Of Sea-Level Rise On Coastal Wetlands Using In-Situ Mesocosm Experiments, Landscape Modeling, And Traditional Ecological Knowledge Mapping, Kelly San Antonio

Master's Theses

Sea-level rise is an escalating threat to coastal wetlands as increased inundation and saltwater intrusion can lead to lowered productivity, decreased biomass, and plant death – and ultimately land loss. In chapter one, I detailed the interactive effects of inundation and nitrogen on two commonly found saltmarsh species, Spartina alterniflora and Spartina patens. I examined productivity and metrics to these stressors using a controlled mesocosm experiment in the western channel of the Pascagoula River, Mississippi. I found varying strategies of growth between species and differing responses between the short- and long-term. Overall Spartina alterniflora performed better with increased inundation …

The Impact Of High Temperatures On Child Anthropometric Outcomes Worldwide, Natalia A. Cancino Garcia

Master's Theses

High temperatures caused by climate change significantly impact society, including child nutrition. Our research focuses on the impact of high temperatures on the anthropometric outcomes of children aged 1 to 5 in 54 countries worldwide. We analyze the historical climate and anthropometric data to evaluate the effect of high temperature on weight-for-age (WAZ) and weight-for-height (WHZ) in children. Results indicate that high temperatures negatively affect child nutrition, particularly in areas above 20°C, and children in rural areas are more vulnerable. The impact of monthly temperature on child anthropometric outcomes varies across countries, regions, and cultural practices. Economic status alone is …

Assessing University Dance Programs: Evaluating The Dance Education Vs Performance Majors For Teacher Preparedness, Kionna N. Burgess

Master's Theses

The primary purpose of this study was to analyze how universities are preparing all dancers for the option of becoming a dance educator outside of training in dance technique. The researcher evaluated current dance educators in K-12 public education schools on their level of preparation from their chosen undergraduate and graduate programs for dance education. There were two research instruments used in this study: online surveys and online interviews completed by the dance educators. The data suggested that there is a need for more undergraduate and graduate dance programs to provide adequate teacher preparation training for those who may enter …

Effects Of Beet Supplements On Cardiovascular Response Using A Noninvasive Blood Pressure Cuff, Nicholas M. Hughes

Master's Theses

A Calibrated Cuff Plethysmography device was built, tested for verification, and used to experiment on human subjects to measure the cardiovascular response of consuming a beet supplement, specifically looking at arterial compliance and pressure-area curves. Each subject was tested four times. A baseline was measured under normal conditions and after five-minute hyperemia conditions. 10 subjects were given 6 ounces of water mixed with either purple Kool-Aid (control), a SuperBeets supplement, or a SuperBeets Sport supplement and after 45 minutes, measurements were taken undergoing normal and hyperemia conditions once more. The verification testing demonstrated the calibration of the device was effectively …

Whose Woods These Are: Human-Environment Relationships Among Stakeholders Of South Mississippi's Longleaf Pine Ecosystem, Helen Greene

Master's Theses

Between 1870 and 1920, the longleaf pine belt of the southeastern United States experienced an extensive and unsustainable period of logging. In the years after the logging boom the landscape of the Southeast was reforested, but fire suppression and a preference among landowners for loblolly pine resulted in a dense and less resilient forest with reduced biodiversity. This research looks at the human geography of remnants of the longleaf pine ecosystem in South Mississippi and the nature of contemporary relationships between South Mississippi residents and this ecosystem.

In an effort to make sense of the complex relationships between people and …

Brunet: Disruption-Tolerant Tcp And Decentralized Wi-Fi For Small Systems Of Vehicles, Nicholas Brunet

Master's Theses

Reliable wireless communication is essential for small systems of vehicles. However, for small-scale robotics projects where communication is not the primary goal, programmers frequently choose to use TCP with Wi-Fi because of their familiarity with the sockets API and the widespread availability of Wi-Fi hardware. However, neither of these technologies are suitable in their default configurations for highly mobile vehicles that experience frequent, extended disruptions. BRUNET (BRUNET Really Useful NETwork) provides a two-tier software solution that enhances the communication capabilities for Linux-based systems. An ad-hoc Wi-Fi network permits decentralized peer-to-peer and multi-hop connectivity without the need for dedicated network infrastructure. …

Deep Ocean Vehicle Applications And Modifications, Nichole "Nikki" T. Arm

Master's Theses

This project had two primary goals: (1) to explore opportunities to further a deep-ocean vehicle’s reach using alternative pressure spheres, and (2) to implement an existing deep-ocean vehicle (lander) in active scientific research.

I gained a greater understanding of the limitations and design choices made for existing pressure spheres using Finite Element Analysis (FEA). My simplified FEA model predicted sphere failure for the existing 30% Fiber Glass 70% Nylon injection molded spheres at an external pressure of 3,954psi or 2,690m ocean-depth (only a 7.38% error compared to the tested minimum failure depth), so I determined it a valid model. I …

Evaluation Of Facilitation On Translocation Outcomes For San Joaquin Antelope Squirrel In The Carrizo Plain, California, Patrick R. Anderson

Master's Theses

In arid and semi-arid environments, burrowing mammals play a key role in increasing landscape heterogeneity through facilitative species interactions. The loss of burrowing mammal populations can consequently lead to negative effects cascading through the ecosystem. It is critical to understand these facilitative interactions for conservation and management. Understanding facilitative interactions may improve wildlife management tools, like translocation, which is often not very successful. To investigate the importance of burrow facilitation on San Joaquin antelope squirrel (Ammospermophilus nelsoni; SJAS) translocation success, I designed a natural experiment with a burrowing facilitator, the giant kangaroo rat (Dipodomys ingens; GKR). I …

Nanoparticles And The Environment: Biopolymer Grafted Cellulose And Screen-Printed Carbon Nanotube Composites, Dominique Henry Porcincula

Master's Theses

A host of environmental issues will define the state of the environment in the 21^st century, with plastic pollution and water shortages among them. While solutions to these problems require large-scale, multipronged solutions, one way we can address them is through material innovation and the use of nanoparticles.

In the first project, we address the issue of plastic pollution by creating nanocomposites of biodegradable polymers (PLA and PCL) with cellulose nanofibrils. Here, PLA and PCL are grafted from the surface of cellulose nanofibrils via ring-opening polymerization of cyclic ester monomers. Polymer-grafted cellulose (PGC) is characterized with structural analysis, solubility …

Inhibition Of Venom Gland V-Atpase Proton Pumps And Their Role In Snake Venom Acidification And Storage, Samuel Kerwin

Master's Theses

Venomous snakes are capable of storing venom for years while maintaining functionality upon injection, with no known harmful impact to their own physiology; however, the mechanisms behind this are poorly understood. Several major components of venom, most notably SVMPs, are autolytic when active, suggesting the presence of an inhibitory environment during storage to preserve venom functionality. It is hypothesized that the venom gland is continuously acidified by vacuolar rotary proton pump mechanisms (V-ATPases) localized in mitochondria-rich cells found in small concentration within the venom gland secretory epithelium, keeping the venom inert at a pH of 5.4-5.6 during the production/storage period. …

Dance And Emotional Intelligence: Mitigating Anxiety In The Modern Teen, Bridget Morris

Master's Theses

The purpose of this thesis study was to find if emotional intelligence could be increased through participation in dance classes, and if that increase of emotional intelligence could mitigate anxiety in teens today. The researcher held four dance classes with a total of five 15–16- year-old volunteer participants, all with dance experience. Two research instruments were used and data were analyzed quantitatively. The research questions explored were: Q1 What immediate effects do participating in a dance class have on emotional intelligence? Q2 Which components of emotional intelligence develop the most from participating in dance? The data demonstrated that participation in …

How Sewage Pollution Affects Distribution And Life History Traits Of The Southern House Mosquito, Culex Quinquefasciatus, Catherine Dean Bermond

Master's Theses

Eutrophication from wastewater can cause fluxes of nutrients like and carbon and nitrogen in urban waters. One source of nitrogen in freshwater is from untreated sewage discharging from septic tanks. This causes a variety of environmental issues including harmful algal blooms, harming natural predators, and increased production of mosquitoes. Culex quinquefasciatus is the vector of West Nile Virus in St. Tammany Parish, Louisiana. St. Tammany Parish has over 600 miles of septic ditches, which receive effluent directly from aerated treatment units. Culex quinquefasciatus oviposit in polluted waters, and larvae perform well in water with high levels of decomposing organic matter. …

Estimation Of Angular Response Curves Using A Phase Differencing Bathymetric Sonar, Kandice Gunning

Master's Theses

Although Multibeam Echosounders (MBES) backscatter products like Angular Response Curves (ARC) and mosaics have been used and applied to different sediment types as classification tools, little is known about the extraction and interpretation of ARCs using Phase Differencing Bathymetric Sonar Systems (PDBS). This thesis aims to use an across-track approach to develop a method for extracting ARCs from georeferenced bathymetric data using PDBS.

Three different data collection surveys were conducted using a PDBS operating at 540kHz. Using only the bathymetric data, initial ARCs from 3 different intensity classes (high, medium, and low) were successfully extracted, the results of which attempted …

The Examination Of A Teacher Mentorship Intervention On Junior Teachers' Stress And Self-Efficacy, Cagla Cobek

Master's Theses

This study examined a daily Check-In/Check-Out mentorship intervention for junior teachers. Changes in junior teachers’ stress level and their sense of self-efficacy were measured. Researchers collected data from three junior teachers and mentor dyads in a Southeastern school district. A Multiple Baseline Design across three teachers was used in this study to examine the impact of the daily mentorship intervention. The results suggested that daily Check-Ins and Check-Outs with mentor teachers decreased all three junior teachers’ daily stress. The intervention did not impact significantly on junior teachers’ perceived stress and their sense of self-efficacy. Overall, this study supports a promising …

Evaluating Habitat Use By Nekton In Widgeon Grass (Ruppia Maritima), Shoal Grass (Halodule Wrightii), And Unvegetated Bottom Habitats In The Grand Bay National Estuarine Research Reserve, Jessica Woodall

Master's Theses

Seagrass beds support high biodiversity and animal abundance, serve as feeding grounds for a variety of animals, offer shelter from predation, and act as a nursery habitat for juveniles. The species composition of seagrass beds can impact their use as habitat by animals. Two common species of seagrass in the Gulf of Mexico are Ruppia maritima (widgeon grass) and Halodule wrightii (shoal grass). The shallow coastal waters of the Grand Bay National Estuarine Research Reserve (NERR) support both species, but the use of each seagrass as habitat by nekton is poorly understood, which can limit management decision-making. Nekton communities were …

Putting Dance In Triple Threat: Confidence And Knowledge Of Dancing In Middle School Actors, Miranda Taylor

Master's Theses

The purpose of this study is to alleviate feelings of inadequacy in middle school musical theater actors through gained dance knowledge and confidence. The researcher evaluated middle school actors throughout the rehearsal process of a musical. The goal was to answer these three essential questions: Q1 Does feeling confident on stage as an actor/singer correlate with being a confident dancer? Q2 How can dance and choreography be used to increase confidence? Q3 How does previous dance experience effect confidence during a musical? Pre and post questionnaires were given to students who were cast in the show. The data suggested that …

Investigating The Therapeutic Potential Of Cannabigerol (Cbg) In Female Nonalcoholic Steatohepatitis (Nash) Mouse Model, Raznin A. Joly

Master's Theses

Nonalcoholic Steatohepatitis (NASH) is a progressive form of nonalcoholic fatty liver disease (NAFLD) characterized by inflammation, fibrosis, steatosis, and oxidative stress, in addition to excessive fat accumulation in the liver. Cannabigerol (CBG), a precursor molecule of Cannabidiol (CBD), has demonstrated anti-inflammatory and anti-oxidative effects in various studies. Our previous data showed that a low dosage of CBG reduced inflammation and fibrosis in male NASH mice. However, the impact of CBG on female mice remains unknown. Recent studies have identified changes in immune cell populations in NAFLD patients. The goal of this project was to test the impact of CBG treatment …