Digital Commons Network^™

Modeling Mars Chaos Terrains As Fracture Mosaics, Aidan C. Buie

Earth and Planetary Sciences ETDs

Chaos terrain exists on several planetary bodies but most notably on Mars. With 30 different named terrains and hundreds of chaotic or ”chaos-like” terrains, they are one of the most prominent and visible features on the planet. Chaos terrains have many visible similarities to each other: they all are comprised of polygonal blocks separated by fractures or channels. These blocks vary from angular to rounded and from flat plateaus to small hills, and the fractures vary from flat floored to ”v” shaped. Often, a single chaos will contain all of these morphologies. Most of the 30 named chaoses on Mars …

Making The Macc: Communities Of Practice And Cultural Citizenship In Austin, Texas, Cassie Lynn Smith

Anthropology ETDs

Meaningful community engagement is a challenge for local governments without a thorough understanding of constituents’ histories and their relationship with City government. This dissertation investigates the City of Austin’s (COA) Emma S. Barrientos Mexican American Cultural Center (MACC) in Austin, Texas, to understand how this culture and arts institution engages with and is influenced by its patrons. This study analyzes the role of the MACC’s community of practice (Lave and Wenger 1991)—an evolving group of educators, activists, artists, and COA staff—in shaping public policy and educational programming as well as creating places of belonging for marginalized people in the city. …

“…Stay On It…”/A Theory///“Illumination Happens”//, Lara E. Goldmann

Art & Art History ETDs

“…stay on it…”/a theory///“illumination happens”// is a critical engagement with the work of contemporary Black artists Arthur Jafa and Adam Pendleton, explored through the lens of the Black radical tradition. Bridging aesthetics, politics, and history, the dissertation investigates how their visual, sonic, and conceptual practices articulate Black life, insurgency, and imagination.

Drawing on theorists such as Fred Moten, Sylvia Wynter, Hortense Spillers, Frantz Fanon, and Cedric Robinson, the study constructs a framework that considers Blackness as an ontological, social, and aesthetic force. It examines how Jafa and Pendleton unsettle dominant epistemologies, staging acts of refusal and creation that resonate within …

Microneedle-Based Lc-Ms/Ms Profiling Of Dermal Interstitial Fluid Reveals Early Lipid Dysregulation Contributing To Painful Neuropathy In Prediabetic And Type 2 Diabetic Rats, Srinivasa Rao Gadam

Biomedical Sciences ETDs

Painful diabetic neuropathy (PDN), a complication of type 1 and type 2 diabetes, also occurs in obesity and prediabetes, with dyslipidemia as a modifiable risk factor. The distal-to-proximal neuropathy pattern and length-dependent intraepidermal nerve fiber loss suggest peripheral contributions. We hypothesized that elevated neurotoxic lipid intermediates—diacylglycerols (DAG), free fatty acids (FFA), and acylcarnitines (CARs)—in the dermal interstitial fluid (ISF) drive metabolism-associated hyperalgesia in prediabetic and diabetic rats. Using a microneedle array (MIA) with LC-MS/MS, we profiled ISF and serum lipids from high-fat diet (HFD) and HFD + streptozotocin (STZ) rat models alongside Hargreaves testing. ISF lipid changes appeared earlier (weeks …

Exploration, Expansion, And Optimization Of Bacteriophage Virus-Like Particle Vaccines, Andzoa N. Jamus

Biomedical Sciences ETDs

Bacteriophage virus-like particles are highly immunogenic, self-assembling platforms used for various vaccines. This work shows efforts to explore new vaccine candidates against Chlamydia trachomatis, targeting proteins that play critical roles in attachment and entry into the host cell, as well as in pathogenesis and bacteria proliferation. This work also shows the optimization of previously identified candidates, by investigating how altering routes of immunization can change the antibody profiles elicited, both systemically and locally. Finally, this work shows the establishment of various Chlamydia infection models in an effort to expand the ways in which vaccine efficacy can be investigated, particularly …

Immune Regulation In Fungal Airway Inflammation And Host Defense, Ruoning Wang

Biomedical Sciences ETDs

Asthma is a chronic inflammatory disease of the lungs characterized by complex pathophysiological mechanisms and diverse endotypes, primarily categorized as T helper type 2 cell (Th2)-high and Th2-low asthma. Despite significant advances in understanding asthma pathogenesis, the mechanisms governing the pulmonary immune system’s response to external challenges have not been fully understood. To address these gaps, this comprehensive project was designed to investigate the interplay between fungal infections and specific CD4⁺ T cell populations in asthma. Our findings suggest that fungal infections can contribute to neutrophilic asthma by promoting the migration of platelet-myeloid aggregates into the lungs. We also …

Localization Of Alpha Power Deficits In First Episode Psychosis, Crystal A. Garcia, Juan Bustillo

Biomedical Sciences ETDs

The purpose of this study was to determine where in the brain there may be a difference in brain activity in patients during their first episode of psychosis (FEP) compared to healthy controls (HCs) while performing an auditory oddball task. Time-frequency analysis allows for spectral decomposition where the signal measured by magnetoencephalography (MEG) is used to characterize changes in neural oscillations and their synchronization over time and region. Previous EEG studies report reduced alpha (8-12Hz, 70-160ms) power but most studies focused on patients with chronic schizophrenia and with limited source localization.

Improving Infiltration Model Performance In Arid And Urban Regions, Samuel Stephen Coulter

Civil Engineering ETDs

Flooding in arid regions is infrequent but damaging and limited historical data makes flood modeling an important tool for flood infrastructure design. This study improves flood modeling guidance by using plot-scale tests to determine the impact of slope, compaction, gravel mulch and landscape fabric on infiltration and runoff rates in sandy soil types. This data will be used as guidance for the linear and constant model. The performance of this model was compared with the curve number model for a hypothetical 100-year design storm. Results showed that gravel mulch increased infiltration rates by 66% and reduced erosion on steep and …

Finite Element Investigation Of Blast Load Responses In Nuclear Power Plant Containment Structures, Janak Raj Awasthi

Civil Engineering ETDs

Some significant incidents like the Chernobyl disaster (1986), the Fukushima Daiichi hydrogen explosion (2011), and some frequent military and terror threats to the nuclear Power plant structures have led to studying the capacity of power plant structures to withstand blast loadings. From this research, even one-third of the loss of the coolant is enough to damage the power plant structure. Crack starts from the wall and propagates toward the top of the dome and the foundation. The external blast shows high damage symptoms near the foundation area. Most of the steel members, including the rebars, Liner, and Tendons, showed high …

Understanding The Metallic And Oxide Phases In Platinum-Based Bimetallic Heterogeneous Catalysts After High-Temperature Oxidation, Stephen John Porter Jr

Nanoscience and Microsystems ETDs

Platinum (Pt) and palladium (Pd) are critical components in diesel emission control systems, enabling the conversion of harmful pollutants under demanding conditions. However, Pt’s effectiveness is hindered by sintering under high-temperature oxidizing environments. This dissertation investigates how Pt and Pd evolve under oxidizing conditions at 800°C, highlighting their distinct thermodynamic behaviors and interactions. Using TEM, EDS, EELS, XRF, XRD, and EXAFS, we show that Pd suppresses Pt sintering by reducing the volatility of PtO₂, leading to the formation of stable particles. Both Pt and Pd are present in metallic and oxide states, forming biphasic 'Janus' particles with conjoined metal and …

Phase Nanoscopy With Correlated Frequency Combs, Xiaobing Zhu

Optical Science and Engineering ETDs

In this dissertation a sensing method applying to any physical quantity that modifies optical phase is developed. Two pulses are produced inside a synchronously pumped Optical Parametric Oscillator, generating two identical, undistinguishable frequency combs. The physical quantity to be measured applies a small phase shift/round trip to one of the pulses, resulting in a frequency shift of the corresponding comb. The latter frequency is measured as a beat by interfering the two combs on a detector. A world record resolution, close to the quantum limit, of 0.033 nanoradian (corresponding to 0.006 fm in displacement) is achieved. A detailed analysis of …

Advancing Diamond Quantum Sensors: Isotropic Flux Concentrators And Phase Noise Mitigation, Maziar Saleh Ziabari

Optical Science and Engineering ETDs

Two methods for improving the sensitivity of nitrogen vacancy quantum sensors in diamond are explored. First, by passively concentrating the magnetic flux, three orthogonally oriented ferrite truncated cone pairs amplify the field isotropically by 19 times, allowing measurement of Earth's field without a bias field and increasing sensitivity. Through thorough analysis, modeling and tuning a novel 3-dimensional flux concentrator system, we achieve a fractional standard deviation of less than 1% anisotropy and quantify minimal deadzones and ambient temperature-limited variations below 40 nT/hour. Second, we characterize, model and calculate phase noise in NV experiments, which in NV sensors is effectively indistinguishable …

Predicting Leakage From Nuclear Material Containers At Los Alamos National Laboratory Through Drop Testing, Leak Testing, Finite Element Analysis And Digital Image Correlation, Jude M. Oka, Yu-Lin Shen, Osman Anderoglu, Pankaj Kumar, Rajendra Vaidya

Mechanical Engineering ETDs

Los Alamos National Laboratory (LANL) relies on containment vessels to safely manage special nuclear material. These containers are subject to rigorous testing—such as drop, fire, and water ingress testing—to ensure integrity under adverse conditions. While elastomer-based seals are well studied, metal-to-metal sealing mechanisms remain under investigation, particularly under dynamic loading. This research focuses on the relationship between container mating surfaces and impact loading through drop testing. Finite Element Analysis (FEA) models were developed and validated using Digital Image Correlation (DIC) to measure strain during impact. Drop tests at varying heights showed strong correlation between FEA and DIC results, confirming the …

Networked Systems: Synchronization, Decomposition And Transient Dynamics, Amirhossein Nazerian

Mechanical Engineering ETDs

This dissertation investigates synchronization, transient dynamics, control, and signal amplification in networked dynamical systems. First, it examines complete and cluster synchronization, including cases with large parametric mismatches, in both natural (e.g., brain networks, fireflies) and technological systems (e.g., power grids, robotics). Second, it studies transient dynamics in consensus processes, designing synchronization strategies that link reactivity, contraction theory, and Lyapunov exponents. Third, it addresses the computational limits of Model Predictive Control (MPC) for large networks by introducing an algebraic decomposition method that enables parallel online computation of smaller subproblems, enhancing MPC performance under hardware constraints. Finally, it analyzes the structural role …

Instability Analysis In Cylindrical Thin Film–Compliant Core Structures: Numerical Simulations And Effects Of Inelastic Deformation, Md Al Rifat Anan

Mechanical Engineering ETDs

When a thin film bonded to a thick compliant substrate is subject to in-plane compression, wrinkles can develop if the critical state for instability is reached. In various applications the film/substrate system may also take the form of cylindrical fibers, where an axial compressive loading can trigger axisymmetric wrinkles. A straightforward computational approach to simulate such wrinkling behavior is needed for material design, to either prevent wrinkling or to exploit its benefits for flexible device applications. In this work a comprehensive numerical study is undertaken by employing the finite element method. The embedded imperfection approach used previously for planar structures …

Multiscale And Multi-Model Studies Of Metal Plasticity, Luo Li

Mechanical Engineering ETDs

Plastic deformation is the process in which the material deforms permanently due to external effects. Twinning and slip are two main mechanisms of plastic deformation in metallic materials. The prominent mechanism of plastic deformation in metals that have FCC crystal structures is slip or gliding movement of dislocations, which is mainly focused on here. In the current study, frameworks for investigating plasticity phenomena of metals at different scales ranging from microscale to macroscale are demonstrated. Specifically, the macroscale modeling of plastic response of metallic materials induced by indentations are emulated by nonlinear FEA simulations. Simulation results of macroscale modeling are …

Advancements In Microarray Manufacturing Enable Emerging Technologies, Kendall Hoff

Biomedical Engineering ETDs

Significant advances in manufacturing technologies have enabled the production of new DNA microarrays for use in emergent technology. Photolithography, wafer scale manufacturing, and improvements in synthesis chemistry and design enable high-throughput production of extremely high-quality arrays. These new arrays offer extremely high oligonucleotide densities, in the range of tens of thousands of oligonucleotides per square micron. They also offer smaller features sizes, with millions of features per square centimeter. Furthermore, they can be manufactured with the DNA tethered at either end to the surface, leaving either the 5’ or 3’ end free and available for use in enzymatic reactions; and …

Composition Portfolio Of Doug Falk, Doug Falk

Music ETDs

This composition portfolio contains six compositions:

Heterogeneity (2020) for solo guitar

Amalgamation (2023) for reed quintet

Oil and Vinegar (2024) for wind symphony (satisfying the requirement of one work for large ensemble)

Shouting into the Abyss (2024) for flute with electronics (satisfying the requirements of a work for electronics and a work for voice)

Movements Come, Movements Cease (2025) for voice, trumpet/flugelhorn, marimba, electric bass, drum set and fixed media; written in collaboration with choreography by Laura Orozco Garrett (satisfying the requirement of one collaborative work)

Celestial Bodies in Motion (2025) for 10 piece wind ensemble (satisfying the requirement for …

An Analysis Of Employment Patterns And Career Decisions Among Dental Hygienists: In A Transforming Healthcare Landscape, Shirley Calderon Jamarck

Dental Hygiene ETDs

The purpose of this study was to identify the factors contributing to dental hygienists’ consideration of changing careers, retiring early, or feeling burned out. A 26-question survey was emailed to members of the American Dental Hygienists’ Association, with 742 responses meeting inclusion criteria. Participants evaluated aspects of their careers, including job satisfaction, wages and benefits, personal growth, work-related stress, burnout, work-life balance, and retirement plans. Results revealed that one-third of respondents planned to leave the profession, citing burnout, physical strain, and limited career growth as reasons. High correlations were found between job satisfaction and feeling valued, professional accomplishment, and growth …

Lifestyle Factors Contributing To Occupational Heat-Related Acute Kidney Injury, Jonathan Specht, Fabiano Amorim, Flavio De Castro Magalhaes, Zachary Mckenna, Zachary Schlader

Health, Exercise, and Sports Sciences ETDs

Workers worldwide are at risk for acute kidney injury due to hyperthermia and dehydration as a consequence of exertional heat stress. Limited research has explored the impact which lifestyle agents such as beverages, recreational drugs, and medications have on core temperature, hydration, and risk of acute kidney injury during physical work in the heat. To address this research gap, we explored the impact of three agents frequently used by construction workers on thermoregulation and markers of risk of acute kidney injury. First, we investigated the effect which ibuprofen ingestion has prior to one hour of running in the heat on …

Addressing Head Injuries In High School Football: An Assessment Of Best Practices And Challenges In The Area Of Concussions As Held By New Mexico Activities Association High School Varsity Football Head Coaches And Athletic Directors, Alonzo Maestas

Health, Exercise, and Sports Sciences ETDs

Youth sports participation in the United States offers children and adolescents opportunities for physical activity, skill development, social interaction, and personal achievement. However, with sports comes the risk of injury, including concussions. Concussions can have serious long-term consequences such as chronic traumatic encephalopathy (CTE). In response to the risks of concussions, New Mexico enacted a concussion law, NM Stat 22-13-31. In addition to this law, the New Mexico Activities Association (NMAA) and National Federation of High School Associations (NFHS) have also given guidance on how to manage concussions.

However, there is a gap in the literature concerning concussion education, best …

Deaf Black Youth's Narratives About Identity And Education, Dominic A. Harrison

Language, Literacy, and Sociocultural Studies ETDs

This study is significant in exploring the different ways in which Deaf Black youth construct their identities through the use of narrative inquiry. Educators of Deaf youth should acknowledge how the identity journeys of Deaf Black youth are often affected by the school and home communities. This research employed narrative inquiry to understand how Deaf Black youth construct their identities as Black Deaf individuals. Using Critical Race Theory (CRT) as a theoretical framework with the guidance of Intersectionality and Dis/ability Critical Race Theory (DisCrit) lenses, the study specifically examined four Deaf Black youth’s narratives to highlight how they construct and …

Spanish Language Arts Guerreras Y Guerreros: Narratives Of Figured Worlds On Pedagogy, Lucha, E Identidad, Mishelle L. Jurado

Language, Literacy, and Sociocultural Studies ETDs

This dissertation explores how Spanish Language Arts (SpanLA) teachers in dual language high school programs construct and narrate their identities through pedagogical choices. Using critical narrative inquiry and the theoretical lens of figured worlds (Holland et al., 1998), the study centers the lived experiences of bilingual educators who resist deficit perspectives and reimagine their classrooms as spaces of cultural affirmation, linguistic justice, and transformative pedagogy. Data sources include semi-structured interviews, teacher-selected artifacts, and focus groups. Findings reveal that SpanLA educators enact linguistically and culturally nourishing pedagogies, rooted in ancestral memory, critical consciousness, and a commitment to student agency. These educators …

Interdependence And Place In Mescalero Homelands, 1660-1865, Joseph A. Ukockis

History ETDs

This dissertation examines strategic relationships that Mescalero Apaches made among themselves and with non-Mescalero communities from 1660 to 1865. It references Mescalero place names in piecing together pertinent stories across their vast ancestral homelands, demonstrating regional continuities in social, political, and economic dynamics over two centuries. It argues that bonds of interdependence, rather than armed resistance, were critical in maintaining autonomy and the ability to move freely, conduct effective diplomacy to protect claims to homelands, access resources in times of scarcity, and form key alliances that presented possibilities for resistance to colonial domination. Central to these dynamics were Mescalero and …

College Football Or Abortion Education? An Examination Of The University Of Arizona’S 1974 Stadium Bonds Bill, Emma Masterson

History ETDs

In 1974 the University of Arizona renovated their football stadium through a bonds bill passed by the state legislature. The renovations allowed the university to increase the stadium’s capacity by 17,000 seats. While in the state house, an Arizona Congressman attached a rider to the bonds bill banning the university’s medical school from performing abortions in most circumstances, effectively barring the university from teaching the medical students how to perform the procedure as well. This thesis seeks to position the University of Arizona football stadium renovations and abortion ban within the larger histories of American higher education and Arizona. This …

Optimizing Distributed Boundary Exchanges For Benchmarks, Solvers And Sparse Matrix Operations, Gerald Collom

Computer Science ETDs

Boundary exchanges dominate the cost of both stenciled codes and those that rely on sparse matrix operations. The performance of large boundary exchanges is limited by synchronization overheads and injection bandwidth limitations. Irregular boundary exchanges incur additional overheads due to the large number of required messages. This thesis investigates multiple methods for improving the performance and scalability of both Cartesian and irregular boundary exchanges. Since boundary exchanges are typically performed iteratively, persistent communication presents an opportunity for optimization by sharing and amortizing setup costs. Partitioned communication is also explored to increase asynchrony, reducing bottlenecks from synchronization overheads and data congestion. …

Exploring Immune System Through Computational Modeling: A Comprehensive Study Of Lymph Nodes And Immune Response Scaling, Vaccine Efficacy, And Large-Scale Extreme First Passage Time, Jannatul Ferdous

Computer Science ETDs

The adaptive immune response is a complex defense mechanism that develops over time to recognize and eliminate pathogens with remarkable precision and durability. This dissertation investigates the dynamics, scaling, and efficiency of the adaptive immune response through a synthesis of computational modeling, mathematical analysis, and agent-based simulations. First, we analyze the topology of the lymphatic network and investigate the T cell search time to find the lymph node that is containing the matching dendritic cell. Second we show how the scaling of lymph node number and volume with body mass, leads to scale-invariant search times for T cells locating antigen-bearing …

Secured Through Stone: The Power, Monuments, And Memory Of Thyra Danmarkarbót And The Jelling Dynasty, Jacquelyn Truitt

History ETDs

Sometime in the mid-tenth century on the Jutland peninsula of Denmark, the Viking Age Queen Thyra (d. ca. 958/9) passed away and the epithet Danmarkarbót—Denmark’s Adornment—was skillfully carved onto her memorial runestone. Yet Thyra’s story has been clouded by few and unreliable textual sources, by differing assessments of her familial background that have emerged from those sources, and by misrepresentations of the material culture relating to her. This thesis explores Thyra and her place within the Viking Age Jelling dynasty through textual and material evidence and considers how the construction of both medieval and modern memory work and memorialization …

The Nature Of Anthropogenically Driven River Drying: Spatiotemporal Causes And Consequences, Eliza Inez Gilbert

Biology ETDs

Streambed drying naturally occurs in over 60% of rivers and streams worldwide. Climate change and human regulation of surface and groundwater have increased drying in naturally intermittent systems and caused perennial systems to transition to intermittency, impacting water security, water quality, and biodiversity. To understand human-induced drying dynamics, we used 12 years of daily drying data along a 154-km regulated reach of the Rio Grande. We conceptualized river drying as a regime analogous to the natural flow regime paradigm and quantified drying magnitude, rate of change, and duration. Although linear models predicting drying magnitude and rate of change were uninterpretable, …

Nitrogen Addition Additively Boosts Climate-Driven Salsola Tragus (Russian Thistle) Invasion Into Southwestern Usa Grasslands, Melissa A. Bacigalupa

Biology ETDs

Effective management of invasive, non-native plants requires understanding key drivers of invasion, including nitrogen enrichment from atmospheric deposition and agriculture. Long-term studies are essential for capturing complex invasion dynamics yet remain uncommon. We used 22 years of observations and 14 years of nitrogen experiments to examine invasion by Salsola tragus (Russian thistle) into three semi-arid grasslands of central New Mexico. Invasion patterns varied, with rapid expansion in Chihuahuan Desert grassland and the Desert-Plains ecotone but stability in Plains grassland. Under ambient nitrogen, precipitation most strongly correlated with Russian thistle biomass and high native grass biomass was associated with Russian thistle …