Digital Commons Network^™

Environmental Ozone Exposure, Gestational Health, And The Lung-Placental Axis, Russell Hunter

Biomedical Sciences ETDs

Adverse gestational outcomes of pregnancy are a globally occurring threat to fetomaternal health, with limited clinical prognostic and intervention strategies aside from premature labor induction. Epidemiological data shows strong correlations between gestational exposure to air pollution and the incidence of adverse gestational outcomes. The research presented here was designed to evaluate potential murine models of gestational exposure, as well as quantify maternal cardiovascular damage therein. These studies employ radiotelemetry, echocardiography, single cell RNA-sequencing, and untargeted lipidomic analyses in efforts to study these effects. Results implicate cardiovascular responses to mid-gestational ozone exposure as evidenced by decreased maternal cardiac output and increased …

Racialized Masculinities In Professional Basketball: Utilizing Mixedness To Challenge Commonplace Black/White Media Discourses About Nba Players, Anthony C. Peavy

Communication ETDs

In this dissertation project, I utilize a Critical Mixed Race Studies (CMRS) lens to examine how mixed-race Black/White players in the National Basketball Association (NBA) are represented, discussed, racialized, and gendered by major sports media platforms. More specifically, I utilize this project to elucidate how media centered on professional basketball continue to partake in hegemonic and essentialist rhetoric surrounding Black and White masculinity—that which has been used to discuss Black and White men in basketball throughout the entire history of the sport—to homogenize mixed-race Black/White men in the NBA and present them in a way that diminishes the potentially deconstructive …

Electrodeposition Of Giant Magnetostrictive Transducers For A Fabricated Mixed Physics Signal Transmission Device, Mina Faltas

Nanoscience and Microsystems ETDs

Non-intrusive solutions for communication through a sealed metal vessel requires the use of piezoelectric transducers to transmit acoustic waves through the vessel wall. This approach suffers the disadvantage of compromised security because a potential eavesdropper could decipher the correlation between digital and electric signals of both sides of the system. One solution is a mixed physics system employing magnetostrictive transducers.

For a magnetostrictive transducer to work well in this application, it would have to have a high piezomagnetic constant. This is influenced by soft magnetism and saturation magnetostriction. Nickel-Iron-Cobalt alloys are modified to retain their soft magnetic properties while increasing …

Extremum Seeking Control Algorithms For Extremely High Frequency Antenna System Pointing, Scott Shore

Mechanical Engineering ETDs

The research examines the application of extremum seeking control (ESC) algorithms to ground station antenna pointing for extremely high frequency (EHF) communication systems. ESC algorithms search for local maxima or minima by locating where an objective function gradient goes to zero. With wireless communication expanding into higher frequencies, the ground station pointing requirement is increasing. ESC presents a method which utilizes available equipment and information to perform ground station pointing. Additionally, ESC algorithms do not rely on assumptions or approximations needed for other techniques. The dissertation demonstrates ESC algorithm feasibility for the ground station pointing problem, benchmarks the ESC algorithms …

Post-Wildfire Export Regimes Of Solutes Along The Gallinas-Pecos River-Santa Rosa Fluvial Network, Asmita Kaphle

Civil Engineering ETDs

Wildfires significantly contribute to water pollution when ash and sediments, including nutrients and metals, are released into fluvial systems, impacting aquatic ecosystems and surrounding communities. This study focuses on the impacts of the Hermits Peak-Calf Canyon Fire on the Gallinas and Pecos watersheds. It employs five monitoring stations along a 190km fluvial network to assess solute export regimes post-fire, where grab samples were collected for nutrient and metal analyses for a period of more than a year. The metrics used for characterizing mobilization, chemostatic, or dilution patterns indicated mobilization for most solutes at all sites upstream of Santa Rosa Lake. …

Ai Assisted Workflows For Computational Electromagnetics And Antenna Design, Oameed Noakoasteen

Electrical and Computer Engineering ETDs

These days large volumes of data can be recorded and manipulated with relative ease. If valuable information can be extracted from them, these vast amounts of data can be a rich resource not just for the digital economy but also for scientific discovery and development of technology. When it comes to deriving valuable information from data, Machine Learning (ML) emerges as the key solution. To unlock the potential benefits of ML to science and technology, extensive research is needed to explore what algorithms are suitable and how they can be applied.

To shine light on various ways that ML can …

A Moving Target Architecture As A Side-Channel Countermeasure, Rachel M. Cazzola

Electrical and Computer Engineering ETDs

We investigate a novel side-channel attack countermeasure called Side-channel Power analysis Resistance for Encryption Algorithms using Dynamic partial reconfiguration (SPREAD). The countermeasure leverages a strategy that is best characterized as a moving target architecture. Modern field-programmable gate array (FPGA) architectures provide support for dynamic partial reconfiguration (DPR), a feature that allows real-time reconfiguration of portions of the programmable logic (PL) while the FPGA continues to carry out computing tasks. Using the Advanced Encryption Standard (AES), the proposed moving target architecture leverages DPR to change the implementation characteristics of the substitution boxes (SBOX) in real time. We present experimental hardware results …

Domain Specific Feature Representation Learning For Diverse Temporal Data, Farhan Asif Chowdhury

Computer Science ETDs

Humans can leverage domain context to recognize novel patterns and categories based on limited known examples. In contrast, computational learning methods are not adept at exploiting context and require sufficient labeled examples to achieve similar accuracy. Many temporal data domain, for example, seismic signals and oil mining sensor data, requires domain expert annotation, which is both costly and time-consuming. The dependency on training data limits the applicability of machine learning algorithms for domains with limited labeled data. This dissertation aims to address this gap by developing temporal mining algorithms that exploit domain context to learn discriminative feature representation from limited …

Conceptual Meaning In Phonology: Multimodal Iconic Expressions In Discourse Focus, David Páez Acevedo

Linguistics ETDs

In everyday communication, speakers go beyond words to synchronize speech sounds and gestures, adding nuanced meanings. For instance, in Colombian Spanish, recounting the distant past involves elongating words, modulating pitch, and using expressive hand movements. This dissertation explores this phenomenon, termed Multimodal Iconic Expressions (MMIEs), using Cognitive Linguistics and Cognitive Grammar. The quantitative study uncovers correlations between verb aspect, nominal quantification, and speech duration, revealing phono-iconic connections. The qualitative study examines construal operations giving rise to MMIEs across semantic domains. MMIEs predominantly appear in discourse Focus, with durative events and mass-like quantities exhibiting pronounced phono-iconic associations. Patterns include stress and …

Phenological Activities Of Desert Bees Track Rainfall More Than Temperature And Predict Temporal Abundance Trends Over 16 Years, Jade Elijah Mclaughlin, Jade Mclaughlin

Biology ETDs

Phenology, the timing of recurrent biological events, is a key mechanism by which species adapt or acclimatize to variable environmental conditions, including those influenced by climate change. Measurable traits, including the onset and end of activity, peak activity, and duration, characterize the phenology of life events, and could be significant predictors of trends in population abundance or stability in a changing climate. Bees provide critical pollination services, and understanding the covariates of bee phenological traits can refine predictions on the vulnerabilities of bees and their services to climate change. We paired 16 years of monthly bee survey data (2002-2019) with …

An Exploration Of Tissue Specific Impedance Using Microneedle Based Wearable Sensors, Kaitlyn J.H. Read

Nanoscience and Microsystems ETDs

Within this research, I have developed a microneedle-based wearable sensor for plants and fungi, to measure the electrical impedance of different tissues. Electrical impedance measures the physical properties of a material while allowing complex biological systems to be modeled onto a simplified electrical circuit. Microneedles allow for electrical impedance to measure specific tissues without the insulative properties of the cuticle and can be applied to delicate tissues. I have demonstrated the tissue specificity, novel attachment methods, as well as use on both plants and fungi. In chapter 1, I applied microneedle-based impedance to the leaf midrib of a sorghum and …

Application Of An Empirical Density Law Via Python For Aqueous Plutonium Chloride Systems For Mcnp6, Riley Bulso

Nuclear Engineering ETDs

A predictive density law has been implemented and developed into a Python tool to reduce bias and the high degree of conservatism in criticality safety calculations for aqueous plutonium chloride systems. Based upon available data and parameters, an empirical method was used to create this law. This method was used in the development of a Python tool to predict the density and composition of such a solution, which may then populate material data in an MCNP6 input file.

This tool and the density law equation have been verified against experimental data points for accuracy. Density is predicted with a maximum …

Carrier Dynamics In Green Iii-Nitride Leds Using Small-Signal Electroluminescence, Xuefeng Li

Optical Science and Engineering ETDs

Solid-state lighting has achieved significant success over the past two decades, but the low quantum efficiency of green LEDs (i.e., the “green gap”) remains a barrier to full red-green-blue (RGB) displays in numerous applications. Combating efficiency reduction in longer-wavelength LEDs requires understanding the relative roles of intrinsic effects (e.g., wave-function overlap, carrier-current density relationship, phase-space filling (PSF)) vs. extrinsic effects (e.g., material degradation due to increased defect density, compositional inhomogeneities, etc.). A systematic study of the carrier dynamics in InGaN/GaN LEDs is very important for understanding the origin of the green gap and for providing solutions to improve the efficiency …

Study Of Si-Gan Photoconductive Switches Operating Modes Using Near-Ir Radiation, Nicolas Eduardo Gonzalez Padilla

Electrical and Computer Engineering ETDs

One of the most promising solid-state devices for fast switching and radio frequency generation applications is the photoconductive switch (PCSS). These devices have been thoroughly explored since the late 1980s and exhibit remarkable switching properties in gallium arsenide (GaAs). With recent advances in wide bandgap (WBG) semiconductor manufacturing processes, there has been an increasing interest in using WBG semiconductors to implement PCSS. WBG semiconductors could exhibit the same switching characteristics as GaAs while overcoming their poor power management and short lifetime under pulsed power conditions, making PCSS a reliable option in high-power applications. Gallium Nitride (GaN) has emerged as one …

Intersections Of Health And Religion: Experiences And Perceptions Of Muslim Refugee Women In The Us Regarding Communication With Healthcare Providers, Sumaira Abrar

Communication ETDs

Delivering healthcare to Muslim refugee patients in a healthcare environment necessitates a profound understanding of their cultural and religious beliefs. The healthcare provider faces intricate hurdles in facilitating effective communication due to the diverse social, cultural, migration, and religious backgrounds within this population. Moreover, bridging the healthcare communication gap often involves grappling with gender-specific expectations aligned with how patients perceive healthcare delivery. To effectively navigate these challenges and enhance patient-provider communication, it is essential for providers to comprehend cultural norms, be well-versed in religious values and restrictions, and grasp the significance of self-care practices and connections to traditional and cultural …

Are The Housing Staff Alright? A Hermeneutic Phenomenological Examination Of The Experiences Of On-Campus Student Housing Professionals Through The Covid-19 Pandemic, Megan J. Chibanga

Teacher Education, Educational Leadership & Policy ETDs

College and university housing professionals served a role they were generally underprepared for as long-term crisis managers during the global COVID-19 pandemic. The COVID-19 pandemic interrupted and shifted higher education operating structures on a grand scale, and housing staff were asked to continue operating on-campus housing facilities throughout the ever-changing response to COVID-19. The purpose of this hermeneutic phenomenological study was to understand the lived experiences of housing professionals during the COVID-19 pandemic. Through the collective experiences of 21 participants three major threads emerged: comfort in the unknown, a need for connection and community, and relentless resilience. Each of these …

Effect Of Fiber Proximity On The Pullout Response: A Finite Element Study, Tyler Mitchell

Mechanical Engineering ETDs

With the advancement of computational capabilities, there is growing interest in
developing intricate models for composite materials. This has been historically chal-
lenging due to the multifaceted interactions and failure mechanisms of these materi-
als. Multiscale modeling holds promise for predicting the intricate dynamics of such
materials. A foundational understanding of their microscale behaviors is critical, par-
ticularly the interfacial interactions between the fiber and matrix. This study delves
into the influence of fiber volume fraction (FVF) on fiber pull-out tests, focusing
on the impact of neighboring fibers across different geometries and the underlying
cohesive properties.

Do I Listen To You, Or Do I Listen To Me? An Individual Difference Investigation Into Advice Utilization, Danielle Nicole Sanchez-Combs

Psychology ETDs

This work addresses three fundamental questions. First, can the source of the advice (crowd or single advisor) be leveraged to enhance advice use? Second, does high skill and high metacognitive ability predict greater advice use or are these individuals also blind to the need for advice? Finally, can personality, performance, and pre-advice confidence factors be used to profile those most likely to benefit from advice? Results indicated surprisingly low advice taking rates (~25% to ~26%) from both advisors, despite the advice being 100% accurate. Advice taking was even lower when individuals were in a high-confidence state, with high-skilled …

Design, Optimization, And Hardware Deployment Of A Deep Learning Model For Gps Spoofing Detection Using Gnss Satellite Receiver Protocol Data, Clarizza Morales Chacon

Electrical and Computer Engineering ETDs

The contemporary GPS infrastructure plays a vital role in advancing Position, Navigation, and Timing (PNT) applications across various sectors, including transportation, commerce, finance, and aviation. To provide a robust and authenticated infrastructure for users, it is important to develop a methodology for verifying the authenticity of satellite navigation signals, especially in civilian applications using the C/A code. This thesis explores Machine Learning (ML) techniques, focusing on the analysis of Global Navigation Satellite System (GNSS) protocol messages like UBX and NMEA to detect anomalies in receiver and satellite behavior, indicative of potential spoofing. The research demonstrates the deployment of Machine Learning …

Mimicking Biofilms: Photosynthetic Assessments Of C. Reinhardtii In 3 Physical Forms, John Michael Roesgen

Biology ETDs

Oxygenic photosynthesis supports the majority of life on Earth through the capture of energy from sunlight and the assimilation of CO₂ into basic building blocks of cells. Microalgae are fast growing and account for about half of global photosynthesis. In addition, they can be cultivated and their metabolism can be redirected to generate additional useful products ranging from biofuels to pharmaceuticals. However, the efficiency of metabolite production is severely impacted by the slow diffusion of CO₂ through water and the high energetic costs of harvesting microalgae from liquid cultures. Microalgae grow in open water, but they also form …

Effects Of Aging On Post-Exercise Oxygen Consumption: A Preliminary Study, Steven Klepacz

Health, Exercise, and Sports Sciences ETDs

Aging and excess post-exercise oxygen consumption (EPOC) is something that has not been adequately studied. Studies looking at EPOC mostly are compiled of young college age individuals. Aging in humans is a topic of much research with still more to be learned. The study in this paper attempts to answer the question of whether age affects EPOC when performing a certain exercise. Preliminary findings based on general age-related research suggest the possibility. This thesis will explore the current research related to age and EPOC, analyze the findings, and discuss additional avenues for future research.

Characterization Analysis And Design Of Mid-Wave Infrared Iii- V-Based Type-Ii Superlattice Nbn Photodetectors For Space Applications, Alexander Timothy Newell

Electrical and Computer Engineering ETDs

The performance of the mid-wave infrared InGaAs/InAsSb nBn photodetector is investigated and its viability for space applications is assessed. Three structures are grown with unique absorber layer doping profiles via molecular beam epitaxy. Material and device characterizations are performed and analyzed to determine the effects of doping on fundamental material parameters and detector performance. Noise-equivalent irradiance is calculated to be a factor of 4x that of an ideal detector exhibiting Rule 07 dark current and 100% quantum efficiency, demonstrating high sensitivity. The structures are then irradiated with 63 MeV protons to evaluate the extent of performance degradation over the course …

Affective Liking Influences Reward Processing In Depression: A Computational Eeg Approach, Garima Singh

Psychology ETDs

Reinforcement learning (RL) enables agents to learn through interaction with their environment. This empowers individuals to optimize actions in complex and dynamic settings. The component of event related potential (ERP) termed as the Reward Positivity (RewP) evidently signifies a fundamental reward prediction error (RPE) associated with rewards. This characteristic implies that it represents a fundamental computational process in the assessment of RL. When a reward is particularly pleasurable or liked by an individual, it tends to elicit an amplified RewP signal, reflecting the heightened positive affect. RPE arises from disparities between anticipated and actual rewarding outcomes and is known to …

A Phenomenological Study Of Successful Superintendent Retention In A North-Central New Mexico School District, Adán G. Delgado

Teacher Education, Educational Leadership & Policy ETDs

Superintendent of Schools is uniquely critical in a school district due to its tremendous effect on the operational and cultural bearing of the organization (Myers, 2011). Superintendent turnover can hinder district reform and improvement (Grissom & Andersen, 2012; Marzano, 2006). The United States and New Mexico struggle with superintendent retention and northern New Mexico is especially plagued with short superintendent tenure (Grissom & Andersen, 2012; NMPED Stat Books, 2021; Sawchuck, 2022). In this study, I investigated the initial selection and subsequent interactions and relationships between school board members and superintendents. Using a phenomenological approach, I interviewed two superintendents and four …

Bloody Rationality: The Dialectic Of Modern Reason And Sacrifice In Hegel, Adorno, And Horkheimer, Cara S. Greene

Philosophy ETDs

In my dissertation, I argue that Hegel, Adorno, and Horkheimer develop theories of modern sacrifice grounded in their critiques of modern reason—what Hegel calls “the Understanding” and Adorno and Horkheimer call “instrumental reason.” I contend that these thinkers recognize the process of rational cognition, which abstracts conceptual data from empirical reality and establishes the dominance of the universal over particular phenomena, as a sacrificial process—a view supported by their routine description of this process using the language of violence and death. However, this sacrificial conception of modern reason isn’t metaphorical: when read alongside their analyses of discursive cunning, an instrumental …

Dynamic Spectrum Management In 3d Networks Inspired By Biological Systems, Jordan Anthony Patrizi

Electrical and Computer Engineering ETDs

In this thesis, the challenge of dynamic spectrum management is treated following an economic-based perspective. In particular, a novel bioinspired spectrum allocation from the Network Service Providers (NSPs) to the users is introduced, exploiting the theory of symbiosis under the free competition. The overall objective is to determine the NSPs optimal bandwidth prices to maximize their profit, while satisfying the users bandwidth needs. The aforementioned spectrum management framework is analyzed while exploiting a novel 3D network architecture consisting of High Altitude Platforms (HAPs), Unmanned Aerial Vehicles (UAVs), and ground gNBs NSPs, each one of them presenting different operational characteristics and …

Teachers-As-Designer In Culturally Revitalizing And Sustaining Indigenous Education, Joshua Colin Krause

Language, Literacy, and Sociocultural Studies ETDs

Despite centuries of colonial attempts to assimilate and eradicate Indigenous ways of life and tongues through the institutions of schooling, communities, students, and teacher-designers are embracing culturally sustaining and revitalizing pedagogies to design curricula from community-driven outcomes backward. Sustaining and revitalizing curricula are place and people-specific and cannot be bought off the shelf, and research in original curriculum design points to the complexities that teacher-designers contend with as they seek community input and put pen to paper to design teaching and learning that is rooted in student identity, holistic wellness, and academic preparedness toward community ends. Research into expert teacher-designers' …

Understanding The Nature Of Pulsars And Characterizing Propagation Effects Using Pulsar Timing, Pratik Kumar

Physics & Astronomy ETDs

Pulsars are highly magnetized stellar remnants, among the densest known objects, and primarily produce radio emission in the form of lighthouse beams sweeping across the line of sight as a regular train of pulses. Apart from providing tests for matter in high-density regimes, general relativity, and plasma emission; perhaps the most notable characteristic is their applicability as precise astronomical clocks to measure various effects. Pulsar Timing Arrays (PTAs) are galactic scale detectors analogous to ground-based detectors of Gravitational Waves (GWs) like LIGO, with the aim of detecting low-frequency nano-Hz GWs from coalescing binary supermassive black holes. PTAs consist of a …

Improving Human-Automation Collaboration In Motion Planning, Torin J. Adamson

Computer Science ETDs

Human-automation collaboration is becoming a part of everyday life as AI helps us drive, make decisions, and solve a variety of other tasks. However, safe and effective collaboration systems depend on factors in trust, communication, and more. Existing studies to explore these are typically carried out in laboratory settings, providing robust data under tight environmental control. However, human behavior evolves over time, driven by external factors that cannot be fully captured in single participation sessions. These factors form the "human context", contextualizing the behavioral data for a more complete understanding. In this thesis, video game adaptations upon conventional subject studies …

Hydrochemistry Of An Alpine Karst System, Northern New Mexico: Las Huertas, Kambray A. Townsend

Earth and Planetary Sciences ETDs

Las Huertas in the Sandia Mountains relies on snowmelt, monsoonal recharge, and groundwater inputs. Our hypothesis, the proportion of groundwater contribution varied spatially and temporally, was assessed by observing travertine and multiple geochemical tracers to differentiate water balance components. We report 26 samples from 13 locations (sampled between 2021-2023). Major ion and isotopic analysis indicated Las Huertas headsprings vary spatially. Capulin Spring has higher salinity; major ions suggest recharged waters are a mix of CaCO3-rich and sulfate-chloride-containing water. The proportion of groundwater to spring discharge is a mix of winter and summer precipitation. Travertine supersaturation is seasonal, with variations downstream, …