Digital Commons Network^™

Facial Expression Recognition Using Convolutional Neural Networks (Cnns) And Generative Adversarial Networks (Gans) For Data Augmentation And Image Generation, Shekhar Singh

UNLV Theses, Dissertations, Professional Papers, and Capstones

Facial expressions play a crucial role in human communication, serving as a powerful means to convey emotions. However, classifying facial expressions using artificial intelligence (AI) can be challenging, especially with small datasets and images. Facial Expression Recognition (FER) is an active area of research, with Convolutional Neural Networks (CNNs) being widely employed for classification. In this research, we propose a CNN-based approach for FER that utilizes both original and augmented datasets to enhance classification accuracy. Experimental results on the FER2013 dataset show test accuracies of 63.39% and 64.59% for the original and augmented datasets, respectively, in a seven-class classification task. …

Emergence, Evolution, And Outcomes Of Community-Based Conservation Behaviors In Coastal Systems, Matthew C. Clark

Boise State University Theses and Dissertations

This body of work leverages a variety of quantitative and theoretical approaches to advance our understanding of why individuals adopt community-based conservation behaviors, the impacts those decisions have on natural resources and human wellbeing, and how these insights can be used for practical conservation planning. The first chapter makes a theoretical contribution by fitting data produced from a stylized, agent-based simulation of conservation adoption over time with a set of probabilistic differential equations derived from the theory of diffusion of innovations and cultural evolutionary theory broadly. We use these methods to demonstrate that such a statistical approach can provide accurate …

Genomic Underpinning Of Drought-Associated Phenotypes In A Keystone Shrub Species Of Western North America, Carlos Dave Contreras Dumaguit

Boise State University Theses and Dissertations

Anthropogenic climate warming and habitat loss threaten species and ecosystem sustainability. Given this, it is urgent to determine whether populations can adapt at a rate sufficient to combat climate change or if human intervention is needed to preserve community ecosystem health. Assessing whether populations could adapt includes inferring whether key phenotypic traits associated to abiotic tolerance are under genetic control and therefore heritable. This thesis focused on the imperiled western North American sagebrush steppe and its widespread eponymous keystone species Artemisia tridentata, (common name, big sagebrush). To determine the adaptive capacity of any population, standing variation for phenotypic traits across …

Seed Predation By Harvester Ants On Native Grasses And Forbs: Implications For Management In A Changing Landscape, Michaela Grossklaus

Boise State University Theses and Dissertations

Vegetation restoration efforts in the sagebrush steppe to date have yielded mixed results. Although many factors contribute to variation in restoration outcomes, seed predation by harvester ants may be an important yet overlooked source of seed loss. Using a selection of grass and forb seeds commonly seeded in local restoration projects, we conducted a field experiment to evaluate whether seed species and spatial arrangement (i.e., distance of seed patches from ant colonies and from each other) affected patterns of seed consumption by Owyhee harvester ants, Pogonomyrmex salinus. To further examine the ecological factors that may affect foraging by harvester …

Multiphysics Numerical Modeling For Pfas Transport Within Vadose And Saturated Zones, Pierrette Iradukunda

Boise State University Theses and Dissertations

The extent and severity of wildfires have increased around the world, necessitating a greater understanding of the consequences of wildfire and post-fire impacts on soil and groundwater. Wildfire suppression techniques like aqueous film-forming foams (AFFF) can also contaminate the soil with per- and polyfluoroalkyl substances (PFAS), which can contribute to human and environmental health concerns. PFAS are dangerous man-made chemical compounds that are persistent, mobile, poisonous, and a major cause of soil and groundwater contamination. In addition to contamination by aqueous film-forming foams, PFAS has accumulated in the environment as a result of being utilized in numerous other goods over …

A Dna Aptamer Transducer Designed Toward Rapid Biosensor Development: A Novel Approach To Modular Biosensing Platforms, Timothy Z. Hachigian

Boise State University Theses and Dissertations

Aptamer-based biosensors have garnered significant interest due to their versatility in detecting a wide range of analytes across various applications. In this work, a customizable Aptamer Transducer (AT) was introduced as a non-enzymatic and modular duplexed aptamer biosensing platform. The design modularity was accomplished by separating the aptamer input domain from the output domain. The AT was demonstrated to be capable of fully transducing an adenosine signal into arbitrary DNA outputs using a structure-switching aptamer design. The AT design utilized strand displacement reactions via toehold mediated strand displacement with fluorescence based reporting for signal detection. Furthermore, the AT was incorporated …

Robust Digital Nucleic Acid Memory, Golam Md Mortuza

Boise State University Theses and Dissertations

The rapid growth of data generation from electronic devices has created a critical demand for efficient and sustainable data storage solutions. Traditional storage systems face challenges regarding reliability, energy consumption, and scalability, necessitating the exploration of alternative technologies. This dissertation explores the potential of Deoxyribonucleic Acid (DNA) as an alternative storage medium, along with the associated challenges and potential solutions.

This dissertation focuses on Digital Nucleic Acid Memory (dNAM), which utilizes Single Molecule Localization Microscopy (SMLM) to encode and store data within DNA structures called DNA origami. SMLM surpasses the limitations of light’s diffraction limit, enabling the imaging of biological …

Impacts Of Habitat Type On Individual Prairie Falcon (Falco Mexicanus) Movement And Foraging Behavior During The Breeding Season, Eden Sunshine Ravecca

Boise State University Theses and Dissertations

Animal movement is a fundamental characteristic of the ecology, fitness, and evolution of species. Movement behavior can differ significantly among individuals within a population and is driven by a multitude of factors, both intrinsic and extrinsic. How and why animals differ in the way they use habitat is central to species conservation, but relying solely on population-level estimates obscures individual variation and can result in ineffective management strategies. Understanding the mechanistic underpinnings of movement and individual variation among wide-ranging aerial predators is particularly challenging, but remains imperative for conservation, given the critical role of higher trophic levels in ecosystem functioning. …

Men Of The Forgotten War: The Korean War And American Masculinity, Elliott D. Sauerwald

Boise State University Theses and Dissertations

While the Korean War is considered America’s “Forgotten War,” the conflict offers rich insight into an unexplored facet of 1950s masculine gender constructs. This thesis examines how Korean War servicemen deviated from hegemonic masculinity by failing to live up to civilian society’s gender standards, and by unwittingly developing alternative masculinities rooted in their shared wartime experiences. Military masculinity declined after World War II in favor of masculinity centered on nuclear companionate fatherhood. The troops who fought in Korea embodied obsolete masculinity and their service garnered less prestige and public admiration compared to that of their World War II counterparts. Nevertheless, …

Development Of Predictive Rockfall Runout Maps Based On Calibrated Rockfall Models, Olivia Tabor

Boise State University Theses and Dissertations

Cliffs formed in columnar jointed basalt have the proper geometry and discontinuities to initiate rockfall events. There are a number of locations in Boise, Idaho that may experience rockfall events from columnar jointed basalt cliffs. Publicly available LiDAR data coupled with site reconnaissance activities were used to develop calibrated two-dimensional rockfall models at a study site in southeast Boise. Photogrammetry was used to determine the volume of seven calibration boulders. The study site, located on Whitney Terrace, consists of a columnar jointed basalt cliff followed by a slope with a subdivision at the toe of the slope.

The two common …

Resolving Taxonomic Uncertainty And Clarifying Species Boundaries In The Cymopterus Terebinthinus (Apiaceae) Species Complex, Annie Taylor

Boise State University Theses and Dissertations

Speciation processes are not well resolved or agreed upon. They are however essential to our general understanding of the evolutionary processes that lead to diversification. Determining the juncture at which a genetically and/or morphologically divergent population becomes a unique species can be challenging, especially with respect to recent divergences and closely related taxa where issues such as incomplete lineage sorting may bring about confounding results. To complicate our theoretical disagreements on species definitions, different models inferring species boundaries may accordingly lump or split species. Using multiple lines of evidence to define species boundaries can greatly improve species inference and preclude …

From Flames To Forage: How Wildfire Affects Elk Behavior And Abundance, Megan M. Whetzel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Rocky Mountain elk (Cervus elaphus nelsoni) is an ecologically and culturally important wildlife species in the Intermountain West, but it is facing habitat changes caused by increasing fire activity. Wildfire frequency is projected to continue to change into the future, yet increases in annual area burned and increases in area burned at high severity may actually represent opportunities for some species. Large herbivores like elk may benefit from increased access to regenerating areas where forage abundance and quality are often elevated. Therefore, effective management of wildlife populations may depend on quantifying how large ungulates, like elk, alter …

Understanding Gendered Risks For Severe Covid-19 Through Surveying The Gender Diverse Community, Arden Tyree

Capstone Experience: Master of Public Health

Early on in the pandemic, the medical community began noticing that men were more likely to be hospitalized, require admission to the ICU, and die of COVID-19 than women but few studies of COVID-19 make mention of gender diverse people, an often-overlooked population who may have vastly different experiences than non-gender diverse men or women. Their variations in gender and sex characteristics may also help provide further insight into which traits are protective or risk factors for this disease. This project used Poisson regression in order to analyze self-reported survey data. The major associations of interest will be between disease …

Operation Wasatch: Scenario Based Planning To Assess The Cold Weather Preparedness Of The National Disaster Medical System, Alison Matthews

Capstone Experience: Master of Public Health

Background: The National Disaster Medical System has little experience with sustained mission operations under anything other than temperate environmental conditions. Extreme weather events increase the complexity of disaster response by presenting significant logistic, operational, and safety challenges. Identifying gaps and vulnerabilities in response capabilities can promote improved Disaster Medical Assistance Team preparedness.

Methods: This discussion based exercise utilized a scenario involving a 7.0 magnitude earthquake along the Wasatch Fault in winter. This exercise was conducted with members of the Wisconsin-1 Disaster Medical Assistance Team. Team members provided oral and written feedback in response to exercise objectives and prompts. This feedback …

An Exploratory Case Study Of Leadership Practices That Enable International Schools To Become Highly Effective And Learning Progressive Environments, Santha Kumar Sankara Narayanan

Dissertations

Highly effective learning progressive (HELP) environments can prepare students to be future-ready with the needed knowledge and skills to thrive in an ever-changing world. This case study captured the characteristics and measured the effectiveness of an international school working to become a HELP environment using the high-reliability schools (HRS) framework and the leadership practices that enabled them.

This mixed-method study used an explanatory sequential design, beginning with a survey of 122 teachers based on the HRS model (Marzano et al., 2014), where teachers were asked to respond to a series of statements designed to measure the case-study school’s effectiveness and …

Impacts Of A Duf2207 Family Protein On Streptococcus Mutans Stress Tolerance Responses And Biofilm Formation, Xiaochang Huang, Camile G. Laird, Paul P. Riley, Zezhang Tom Wen

School of Dentistry Faculty Publications

Locus SMU.243 in Streptococcus mutans was annotated as a member of the DUF2207 family proteins highly conserved in all bacteria but with unknown function. To investigate its role in S. mutans physiology, a SMU.243-deficient mutant was constructed using allelic exchange mutagenesis, and the impacts of SMU.243 deletion on bacterial growth, stress tolerance response, and biofilm formation were analyzed. Compared to the wild-type UA159, S. mutans lacking SMU.243 displayed a reduced growth rate and a reduced overnight culture density (p < 0.01) when grown at low pH and in the presence of methyl viologen. Relative to the parent strain, the deficient mutant also had a reduced survival rate following incubation in a buffer of pH 2.8 (p < 0.01) and in a buffer containing hydrogen peroxide at 58 mM after 60 min (p < 0.001) and had a reduced capacity in biofilm formation especially in the presence of sucrose (p < 0.01). To study any ensuing functional/phenotypical links between SMU.243 and uppP, which is located immediately downstream of SMU.243 and encodes an undecaprenyl pyrophosphate phosphatase involved in recycling of carrier lipid undecaprenyl phosphate, a uppP deficient mutant was generated using allelic exchange mutagenesis. Unlike the SMU.243 mutant, deletion of uppP affected cell envelope biogenesis and caused major increases in susceptibility to bacitracin. In addition, two variant morphological mutants, one forming rough colonies and the other forming mucoid, smooth colonies, also emerged following the deletion of uppP. The results suggest that the SMU.243-encoded protein of the DUF2207 family in S. mutans plays an important role in stress tolerance response and biofilm formation, but unlike the downstream uppP, does not seem to be involved in cell envelope biogenesis, although the exact roles in S. mutans’ physiology awaits further investigation.

We Are Each Other’S Business: Black Entrepreneurship, Trust, And The Mobilization Of Social Capital, Lashawnna R. Harris

Education Doctoral

This interpretive phenomenological study aimed to investigate the interactions between race socialization, trust, and Black entrepreneurs’ social capital mobilization. The 12 study participants conducted business in New York City and the surrounding counties. The primary sources of data collected were semi-structured interviews and researcher journal entries for validity. Four themes emerged from the interpretive analysis conducted: (a) race socialization matters, (b) trust is relationship based, (c) networks are vast but often homogeneous, and (d) competence-based mobilization.

This study found that Black entrepreneurs are influenced by messages about direct and vicarious discriminatory racial encounters. Race socialization messages served as protective instructions …

The Effects Of The Supplemental Nutrition Assistance Program On Community College Students’ Grade Point Average, Retention, And Graduation Rates, Rhonda Mouton

Education Doctoral

The purpose of this quantitative research study was to explore whether community college students who received benefits through the Supplemental Nutrition Assistance Program (SNAP) outperformed those who did not receive SNAP benefits in terms of retention, grade point average (GPA), and graduation rate. The deidentified archival data collected from the College Tracker and Free Application for Federal Student Aid (FAFSA) systems from fall 2018 through spring 2022 included a total of 4,127 sample size of 3,277 continuing students, 312 freshmen, and 538 transfer students who were either SNAP or non-SNAP recipients.

The study's results for each null hypothesis were reported …

Leading In Forced Change: Superintendent Leadership During The Covid-19 Pandemic, Theodore W. Love

Education Doctoral

The COVID-19 pandemic disrupted P-12 public schools in the United States. School district superintendents were forced immediately into managing a crisis and leading organizational adaptation. This doctoral research study examined the lived experience of 15 New York State P-12 public school superintendents. This constructivist grounded theory study found that adaptation is a forced change. The environment forced schools to change, but that force did not change superintendent leadership. It did, however, change the role of the superintendents as they responded to the three major conditions that emerged across the data: (a) the shutdown of schools in March 2020, (b) uncertain …

Investigation Into The Utility Of The Submaxillary Gland Androgen-Regulated Protein 3b (Smr3b) As A Normalizing Factor In Oral Fluid, Alejandro Ocampo

Student Theses

Oral fluid is a biological sample of increasing interest in clinical and forensic toxicology. This matrix is easy to obtain, it shows a low biohazard risk, and it reflects recent drug exposure. However, the interpretation of its quantitative values is limited, due to the high inter- and intraindividual variability. The investigation of normalization factors in this biological matrix may improve the interpretation value of oral fluid. This study investigated the potential of two signature peptides from the submaxillary gland androgen-regulated protein 3B (SMR3B) as normalization factors in oral fluid. SMR3B was digested in trypsin and the signature peptides SMR3B-1 and …

Method Development And Validation Of Controlled Substances On A Gas Chromatography - Fourier Transform Infrared Spectrophotometer, Regina E. Filus

Student Theses

The goal of this project was to perform a validation and a method development for an Agilent 7890 Gas Chromatograph connected to a Thermo iS50 Fourier Transform Infrared Spectrophotometer in order to put the instrument into functional and operational use. Both instruments are connected via an interface allowing for simultaneous analysis of a sample. A custom-made in-house library was created in order to search and compare to future unknown case samples. Reference materials were run and reviewed in order to determine which method and concentrations would provide the best infrared scans, and the sample repeatability runs were used to develop …

The Antagonistic Anatomy Of Anti-Shippers: A Thematic Analysis, Adrian A. Stone

Student Theses

Within the transformative fandom community is an ideologically-affiliated group known as anti-shippers, whose rhetoric contends that fictional interests are an indication of those held in reality. Anti-shippers focus solely on fictional material perceived to be sexual in nature and make frequent references to pedophilia. This rhetoric is used to justify harassment against individuals who do not share in their beliefs. As this population primarily operates on social media, this study was designed to conduct an exploratory investigation into themes gleaned from posts authored by anti-shippers on Twitter. Utilizing latent content analysis, a total of 187 posts from 222 unique users …

Emotion Recogniton In Students With Social Anxiety: Loving-Kindness As An Intervention, Audrey Darnbush

Masters Theses and Doctoral Dissertations

Deficits in emotion recognition can often be found in individuals who have elevated social anxiety—decreasing positive social interaction and increasing social avoidance. Some possible causes for these deficits include: (1) negative interpretation biases for ambiguous social stimuli and (2) negatively biased self-focused and others-focused attention in social situations— which can impede an accurate appraisal of how one is being evaluated. Mindfulness-based interventions target attentional awareness, and some have empirical support for treating anxiety-related issues. However, little research has been conducted to determine the possible therapeutic effects of loving-kindness meditation for social anxiety disorder. Loving-kindness meditation (LKM) is a specific subtype …

Antenatal Steroid As An Independent Risk Factor For Vitamin K2 Deficiency In Newborns: A Chinese Single-Center, Retrospective Study, Ling Liu, Chao-Hong Chen, Shi-Wen Rong, Shao-Zhu Lin, Na-Li Cai, Dang Ao

Saudi Medical Journal

Objectives: To identified vitamin K2 deficiency rate and risk factors among newborns in China and assess the importance of high-risk maternal intakes of vitamin K2. Methods: This retrospective study was performed at the Neonatology Department, the Affiliated Hospital of Guangdong Medical University, China. Routinely collected mother-neonate hospitalization data from July 2020 to January 2021 were analyzed. In total, data from 200 neonates who had completed vitamin K2 tests were utilized to assess the prevalence of vitamin K2 deficiency and identify the potential risk factors. According to the vitamin K2 level, the neonates were divided into 2 groups: cases (vitamin K2 …

A Computational Approach For The Discovery And Characterization Of Oligonucleotide Aptamers For Protein Targets, Godfred Sabbih

Masters Theses and Doctoral Dissertations

Aptamers are short polynucleotide chains that can bind with very high affinities to a broad range of chemical and biomolecular targets, including proteins, cells, viruses, microorganisms, toxins, and chemical compounds. They are analogous to antibodies with applications in therapeutic delivery, biosensors, and diagnostics, but possess the advantages of easy production and lower immunogenicity than antibodies. They are produced by the experimental method known as the systematic evolution of ligands by exponential enrichment (SELEX). SELEX is a powerful experimental method for selecting oligonucleotide aptamers for chemical or biomolecular targets of interest. The SELEX protocol has seen several modifications since its development …

Secondary Teachers' Perceptions On Their Competency And Self-Efficacy Levels Associated With An Integrated Professional Development Approach To Teaching United States History, Darwin Anthony Galloway

Masters Theses and Doctoral Dissertations

The study assessed a multifaceted professional development approach and its impact on teacher competency and self-efficacy. The professional development approach considered in this study reflected an integration of Content Immersion Mini-institutes, Public History Field Experiences, and Collaborative Pedagogical workshops offered to middle school and high school United States history teachers. The major focus of the study was scaled exit surveys and free response questions completed by teachers in six school districts in northeastern Tennessee, who were part of a Teaching American History Grant program sponsored by Tennessee’s First Frontier Consortium. These extant exit surveys were used to determine the relationship …

Integrating Human Psychology Into Car-Following Models For Accurate Response Prediction: A Realistic Approach, Faiza Khan

Masters Theses and Doctoral Dissertations

Car-following models traditionally focus on vehicle kinematics or dynamics parameters without considering human psychology. However, recent research has attempted to incorporate psychology into car-following models. Despite these efforts, there are limitations in understanding the psychological triggers that influence individual drivers' responses. To address this gap, we propose a new car-following model based on the Theory of Planned Behavior (TPB), which incorporates a human element by utilizing concepts of psychology. To gather the data pertaining to human input a questionnaire was carefully developed utilizing the Theory of Planned Behavior. Data collection and analysis were done through a survey using google forms. …

Developing A Predictive Geospatial Habitat Model For A Rare Species Of Salamander In Tennessee: A Case Study For The Green Salamander (Aneides Aeneus), Erin Gaylord

Masters Theses and Doctoral Dissertations

Green Salamanders (Aneides aeneus; Cope and Packard 1881) are a secretive and cryptic species of salamander that can be relatively difficult to detect, due to their occupation of arboreal habitats. The incorporation of geospatial tools is critical in developing models that can be used to predict undocumented locations in Tennessee and elsewhere. Locating the species in Tennessee was accomplished through a total of 18 localities and with that, several habitat characteristics were able to be identified including, but not limited to: appropriately shaded and structured rocks, typical fauna co-occurring within the area, and general topography of the area. Of the …

Vertical Transmission Of Zika Virus In Monodelphis Domestica, Mohini Moulick

Theses and Dissertations

Zika Viral infection in pregnant women may lead to infants born with microcephaly and other neurological complications, making Zika viral research imperative. Prior research demonstrated Monodelphis domestica to be a unique animal model for Zika virus studies, and viral proteins were detected in brain tissue of juveniles after intracerebral inoculation of infants. We wanted to determine if we can detect a viral protein, non-structural protein 1 (NS1), in brain tissue after intraperitoneal inoculation and we found it to be possible through immunohistochemistry (IHC) analysis. We also investigated if inoculated dams (mothers) would give rise to Zika positive pups (natural inoculation), …

Fungal Plant Pathogens Affecting Crops In The Lower Rio Grande Valley, Isabel Martinez

Theses and Dissertations

The Lower Rio Grande Valley (LRGV) located in South Texas has a subtropical and humid environment which is conducive for plant disease. In Chapter 1, Southern blight caused by Athelia rolfsii was collected from Edinburg, Texas in tomato and bean crops. The present study focused on assessing the role of temperature on growth and sclerotia production. We found that there is an optimal growing temperature for both hyphal growth and sclerotia production. In Chapter 2, red rot fungal disease was collected from sugarcane in Texas. Morphology, pathogenicity, effects of temperature, and biocontrol agents were assessed. Isolate morphology closely resembled Fusarium …