Digital Commons Network^™

Phytochemical And In-Vitro Cytotoxic Analyses Of Flavonoid Species Isolated From Chromolaena Leivensis, Luke A. Bryant

Electronic Theses and Dissertations

As a leading cause of death worldwide, cancer and its treatments remain a primary source of interest among researchers. Modern studies are looking into bioselective cytotoxicity to create new chemotherapies that do not have the same harsh side effects as those we use today. Natural product research has a promising future for the development of such treatments. Specifically, polar flavonoids may be the key to a bioselective treatment. Such flavonoid species are native to plants, often within flower petals or within the body. A natural antioxidant, they are designed not to harm healthy cells. This study focuses on the plant …

A Data-Driven Koopman Framework For Station-Keeping On Near Rectilinear Halo Orbit, Anusha Sharma Malladi

Theses and Dissertations

Cislunar missions have gained significant attention in recent decades, motivating the need for efficient modeling and reliable control. In this work a Koopman operator based framework is developed for approximating the error dynamics around a reference Near Rectilinear Halo Orbit (NRHO) in the Earth-Moon Circular Restricted Three-Body Problem (CR3BP). A decoder free neural network is used to learn a lifted linear representation of the nonlinear CR3BP dynamics and a residual based approach is used to identify the corresponding control input matrix. The model is then implemented in a receding-horizon target point controller and compared with uncontrolled propagation and a State …

Developing Imitation Learning Policies By Exploring Diffusion Framework For Quadcopters, Likith Swamireddy

Theses and Dissertations

Imitation learning offers a promising approach in developing near-optimal onboard policies for nonlinear systems, by learning from computationally expensive trajectory planners during offline training. Existing State-of-the-art methods commonly learn deterministic mappings from observations to actions by training fast neural networks to mimic the expert demonstrations, which can limit their ability to capture the action distribution, when the policy is trained on multiple possible expert commands to reach the same target, and this may lead to unsafe scenarios in the obstacle environments. To address these challenges, this study explores Diffusion Models (DMs) as a feedback controller for quadcopters that learns the …

Impact Of School Nurse Education On Factors Influencing Hpv Vaccine Communication With Parents, Jihye Choi, Efrat K Gabay, Jeanette Deason, Elizabeth Baumler, Diane Santa Maria, Daisy Mullassery, Lara S Savas, Erika Thompson, Sanghamitra M Misra, Paula M Cuccaro

Faculty, Staff and Student Publications

Human papillomavirus (HPV) can cause six cancer types but can be prevented with timely vaccination in early adolescence. However, despite the wide availability of the HPV vaccine, uptake remains suboptimal among US adolescents. School nurses are invaluable resources to students and their families regarding adolescent immunization needs. As part of the All for Them vaccination program, we assessed the impact of the continued nurse education (CNE) intervention on school nurses’ HPV vaccine communication with parents. Seventy-two school nurses and nurse administrators in Texas participated in the study. Using a single-arm study design, we measured participants’ potential barriers to and self-efficacy …

Ring Ring Goes The Telephone, Answer That Email: The Immediacy Of Information Communication Technologies And Their Effects On Employee Well-Being, Concepcion Rodriguez

Electronic Theses, Projects, and Dissertations

Rapid technological advances have resulted in information communication technologies (ICTs) with revolutionary capabilities, allowing employees easy access to the workplace without the impediments of time or space. Initial inception of ICTs in the workplace were expected to increase autonomy (Heller, 1989), but the ability to be reachable at any time proved disadvantageous to employee well-being by creating a culture in which immediate responses were expected and precipitating the psychological phenomenon of workplace telepressure, an overwhelming preoccupation and urge experienced by workers to respond to work-related messages (Barber & Santuzzi, 2015; Mazmanian et al., 2013). The current study centered on exploring …

Enhancing Agricultural Sustainability Under Climate Change: A Multi-Scale Framework Integrating Climate Extremes, Resource Efficiency, And Data-Driven Modeling, Shahryar Fazli

Computational and Data Sciences (PhD) Dissertations

Agricultural systems are increasingly challenged by climate variability, where shifting temperature regimes, hydrological variability, and the rising frequency of compound and cascading extremes threaten global food security and resource sustainability. Addressing these challenges requires integrated frameworks that bridge biophysical monitoring, predictive modeling, and adaptive decision-making. This dissertation develops a data-driven, multi-scale framework to quantify and enhance agricultural resilience by integrating remote sensing, climate analytics, and machine learning across the United States, with a focus on California and the Western U.S.

First, hyperspectral and thermal remote sensing data from EMIT and OpenET are integrated to characterize crop nitrogen–water interactions and assess …

Scalable Quality Assessment Of Ground Motion Records Via Interpretable Deep Learning Architectures, Ali Montazeri Namin

All Graduate Theses and Dissertations, Fall 2023 to Present

Earthquake engineers rely on accurate recordings of ground shaking to design safe and resilient buildings. However, sorting through thousands of these recordings to find the reliable ones and throwing out those ruined by sensor errors or background noise is traditionally done by hand. Because modern seismic networks collect massive amounts of earthquake data every day, this manual checking process is much too slow. To fix this, researchers are turning to artificial intelligence to automatically check the quality of these recordings.

While artificial intelligence offers a fast solution, there are limitations. These computer models can become massive and expensive to run, …

Enhancing Teachers’ Intercultural Literacy: Examining The Impact Of A Fulbright-Hays Group Projects Abroad Program To Indonesia, Paul R. Wallace

Journal of Global Education and Research

The Fulbright-Hays Group Projects Abroad (GPA) Program offers institutional grants to support overseas experiences and curriculum development for educators. The study reported here focused on changes in the intercultural literacy of participants involved in a 4-week Fulbright-Hays GPA Program to Indonesia. Participants in this study included K-12 teachers from public schools and teacher education majors. Before and after traveling to Indonesia, eight participants completed a self-assessment of intercultural literacy, which measured competencies, understandings, attitudes, language proficiencies, participation, and identities deemed necessary for successful living and working in a cross-cultural environment. This article presents the results of the assessment survey, along …

Machine Learning-Based Regression For Magnetic Field Prediction From Odmr Spectral Data, Jesse B. Hernandez

Electronic Theses, Projects, and Dissertations

Optically Detected Magnetic Resonance (ODMR) using nitrogen-vacancy (NV) centers in diamond enables sensitive, room-temperature magnetic field sensing, but real ODMR spectra are often noisy and difficult to analyze with traditional peak-fitting methods. This thesis investigates whether machine learning can reliably predict magnetic field strength directly from ODMR spectra, and compares four model families under a single regression task: a random forest, an artificial neural network (ANN), a one-dimensional convolutional neural network (1D-CNN), and a Transformer.

Training data were generated from an NV-ensemble simulation calibrated to real measurements provided by the Ulsan National Institute of Science and Technology (UNIST), spanning 0 …

The Effects Of Eps Level And Presentation Format Of Analysts’ Forecast Deviation On Non-Professional Investors’ Investment Judgments, Clarence Goh, Prasart Jongjaroenkamol, Poh-Sun Seow

Research Collection School Of Accountancy

We experimentally investigate how the presentation format of the extent to which a firm's earnings per share (EPS) diverges from analysts' EPS forecasts (i.e. deviation information) and a firm's EPS level affect the investment judgments of non-professional investors (referred to hereafter as “investors”). Our results suggest that investors' investment judgments are more positive when firms with low (high) EPS levels disclose deviation information in percentage (absolute) terms. Furthermore, when the percentage of forecast deviation is held constant, investment judgments are more positive when EPS levels are high versus low if the deviation information is expressed in absolute terms. By contrast, …

"Please Put The Phone Down!": Self-Determination Theory Applied To Parental Social Media Mediation, Benjamin A. Dolowich

Dissertations

The majority of adolescents and young adults use social media (Chaddock, 2024; Coyne et al., 2013). Parents are faced with the challenge of considering the role social media may play in their children’s lives (Valkenburg et al., 2013). Using self-determination theory as a framework (Deci & Ryan, 2000), we investigated psychological needs as one mechanism connecting parental social media mediation strategies with well-being and emotional distress in a sample of young adults. Participants were 244 undergraduate students who completed online questionnaires. The results highlighted that controlling styles of parental social media mediation have an association with emotional distress. Psychological needs …

My Story Is Good… It’S Not Like That For All: Uneven Access To Contraception Among Incarcerated Women In New South Wales, Australia, Helene Smith, Basil Donovan, Jocelyn Jones, Tony Butler, Paul Simpson

Research outputs 2022 to 2026

Background: Evidence indicates high levels of unmet contraceptive need among justice-involved women, linked to intersecting vulnerabilities such as housing instability, substance use, violence and poor mental health. In Australia, limited research has explored how women in prison navigate access to family planning services. This study aimed to examine the experiences of incarcerated women in New South Wales (NSW) in accessing contraception and making fertility-related decisions.

Methods: The study formed part of the Second Sexual Health and Attitudes of Australian Prisoners (SHAAP-2) study. Seventeen women aged 19–45 were recruited from two NSW correctional centres. Semi-structured qualitative interviews were conducted face-to-face or …

Free-Fall Normalised Peak Braking Velocity For Countermovement Jump Monitoring, Karol Kruczek, André Rebelo, Jason Lake, Michał Nowak

Research outputs 2022 to 2026

Background: Peak braking velocity (PBV) during the countermovement jump (CMJ) is used to describe descent strategy, but its interpretation is affected by countermovement depth. This study introduced free-fall normalised peak braking velocity (PBVFF), a dimensionless index expressing PBV relative to the displacement-specific theoretical free-fall velocity limit, and evaluated its reliability, performance associations and ranking consequences. Methods: Seventy injury-free male academy footballers (18.7 ± 1.6 years) performed three maximal hands-on-hips CMJs on dual force plates. Using retrospective observational routine monitoring data, one representative testing day per athlete was analysed. Two PBVFF variants were examined: PBVFF normalised to countermovement depth (PBVFFCMD) and …

A Projector-Rank Partition Theorem For Exact Degrees Of Freedom In Experimental Design, K. G. Nagananda

Mathematics and Statistics Faculty Publications and Presentations

In many experimental designs—split-plots, blocked or nested layouts, fractional factorials, and studies with missing or unequal replication—standard ANOVA procedures no longer tell us exactly how many independent pieces of information each effect truly contributes. We provide a general degrees of freedom (df) partition theorem that resolves this ambiguity. For N observations, we show that the total information in the data (i.e., N −1 df) can be split exactly across experimental effects and randomization strata by projecting the data onto each stratum and counting the df each effect contributes there. This yields integer df—not approximations—for any mix of fixed and random …

Correctional Officer Suicide: A Theory-Driven Investigation Of Acquired Capability And Suicide Behavior, Abigail R. Andersen

All-Inclusive List of Electronic Theses and Dissertations

A growing body of research suggests that correctional officers (COs) die by suicide at a significantly higher rate compared to the general population and some other public safety personnel. Despite what is known about this phenomenon, an understanding of the risk factors driving the high rate of suicide among this population remains unclear. Specifically, little attention has been paid to specific risk factors for suicide among this population and there is an overall absence of theory-driven research investigating CO suicide. The present study sought to address the gap in this area of research by investigating potential risk factors for suicide …

Sociodemographic And Clinical Factors In Nmosd And Mogad: Disability, Psychiatric Burden, And Disparities, Neha S. Patil

Summer Research Program Abstracts

No abstract provided.

Evaluating The Role Of Perineural Invasion In The Risk Of Local Recurrence Of Cutaneous Melanoma After Adjuvant Radiation Therapy, Riya T. Patel

Summer Research Program Abstracts

No abstract provided.

Biomechanical Gait Analysis To Classify Neurological Gait Scores In A Spina Bifida Sheep Model, Shreya Pandiri

Summer Research Program Abstracts

No abstract provided.

Environmental Or Occupational Heavy Metal Exposure In The Development And Progression Of End Stage Kidney Disease: A Systematic And Network Meta-Analysis, Lauren Nguyen

Summer Research Program Abstracts

No abstract provided.

Evaluating Pediatric Surgical Care Delivery Across Settings: National Trends In Ambulatory, Outpatient, And Inpatient Models, Kyle C. Nevitt

Summer Research Program Abstracts

No abstract provided.

Design Of Automatic Security System Based Internet Of Things At The Museum, Rahmat Ageng Yuwana, Nuryake Fajaryati, Ferry Jie

Elinvo (Electronics, Informatics, and Vocational Education)

This research aims to determine the procedures for developing an Internet of Things (IoT)-based Automatic Security System as a security device for museum objects and to test its feasibility based on user feedback in museums. The Design Thinking model used consists of five stages: Empathize (understanding the user’s perspective), Define (gathering information on the encountered problems), Ideate (generating innovative ideas), Prototype (creating a prototype of the obtained ideas, ensuring the functionality of each device feature, and validating the product through expert judgment for feedback and product revision), and Testing (evaluating the system’s feasibility using Usability standards based on ISO/IEC 9241-11, …

The Association Between Early Postnatal Phosphorus, Magnesium, And Calcium Levels And Neurodevelopmental Outcomes In Extremely Preterm Infants: A Retrospective Cohort Study, Alyssa N. Miller

Summer Research Program Abstracts

No abstract provided.

Complex Care: Impact Of Congenital Malformations And Caregiver Health Literacy On Perceived Outcomes, Poorna R. Menon

Summer Research Program Abstracts

No abstract provided.

We All Read: Adapting An Early Literacy Program For Children With Developmental Differences And Their Families, Rachel Podl

Graduate School of Professional Psychology: Doctoral Papers and Masters Projects

Children with developmental differences face elevated risk for early literacy delays, while their caregivers experience significant difficulty accessing appropriate and supportive resources. This paper describes an adaptation of WeRead, an existing story-time and psychoeducation program through the University of Denver's Baby S.T.E.P.S. Lab, for children ages 0–7 with developmental differences and their caregivers. The program integrated a neurodiversity-affirming read-aloud, a strengths-based art activity, movement and music, caregiver psychoeducation on visual schedules, and collaboration with four community partners. The event drew approximately 65 attendees. A post-program survey, though limited by few responses, indicated that caregivers valued the program's accessibility, community partnerships, …

Translating Fap-Targeted Probes To The Or: Preclinical Evaluation Of Fapi-Cy5 In Pancreatic Cancer, Nicolette R. Mardik

Summer Research Program Abstracts

No abstract provided.

Evaluating Large Language Models For Cpt Code Prediction In Pediatric Orthopedic Surgery, Krishi S. Manem

Summer Research Program Abstracts

No abstract provided.

A Head Of The Curve: Investigating Helmet Therapy Compliance In Patients With Craniosynostosis, Racquel V. Lyn

Summer Research Program Abstracts

No abstract provided.

Consensus Recommendations For Movement Therapies Of Patients With Heritable Vascular Diseases: A Modified Delphi Study, Randy Liu

Summer Research Program Abstracts

No abstract provided.

Too Many Hands On Deck: Assessing The Appropriateness Of Hand Surgery Transfers To The Texas Medical Center, Khang T. Le

Summer Research Program Abstracts

No abstract provided.

Real-World Outcomes Of Patients With Geographic Atrophy Developing Neovascular Age-Related Macular Degeneration After Receiving Anti-Complement Therapy, Charles F. Lano Iii

Summer Research Program Abstracts

No abstract provided.