Digital Commons Network^™

Printing Parameter Determination And Characterization Of Additively Manufactured Kovar Steel, Will Macgreggor Davidson

Mechanical Engineering ETDs

Kovar (ASTM F15, UNS K94610) steel has many applications across Sandia National Laboratories but is best known within academia and industry for its glass-to-metal and glass-to-ceramic hermetic sealing capabilities. Successful printing parameters for a Renishaw AM400 to additively manufacture artifacts from Kovar steel powder have been determined. The printed test artifacts have been studied for ultimate tensile strength, density, surface roughness, hardness, bulk composition, and impact toughness. Longer throughput measurements such as porosity, coefficient of thermal expansion, and grain structure studies have been established for future delivery to the research team. Yet another delivery from this thesis research is a …

Probing The Galactic Agb Population Through Infrared And Sio Maser Emission, Megan O. Lewis

Physics & Astronomy ETDs

Stars on the Asymptotic Giant Branch (AGB) are of low to intermediate mass and have reached the end stages of stellar evolution. The mass-loss that stars undergo at this phase enshrouds the central star in a circumstellar envelope (CSE) that redistributes most of the stellar light into the infrared (IR) regime of the spectrum. In the CSEs of oxygen-rich AGB stars molecules including SiO form, and under certain conditions maser emission from SiO can make AGB stars bright beacons at radio frequencies (e.g., 43 and 86 GHz). SiO masers are ideal observational probes of AGB sources, providing data on their …

Cultivating The Future: Globalized Competition And Environmental Interactions In The New Mexico Chile Industry, Holly Patricia Brause

Anthropology ETDs

Despite the importance of chile to New Mexico, the future of the chile industry in the state is uncertain. Since the passage of the North American Free Trade Agreement (NAFTA) in 1994, chile producers in New Mexico have struggled to compete in a globalized marketplace. Additionally, predicted environmental problems, like impending water shortages and climate change, cast further doubt about the industry’s future. In this dissertation, I show how the New Mexico chile industry has become a binational endeavor. I examine the multiple future-making projects that are being undertaken by individuals and groups involved in the chile industry as they …

Language Co-Activation In Novice And Intermediate L2 Learners, Nicholas Sulier

Linguistics ETDs

One of the most intriguing aspects of bilingual speakers and signers is their ability to access both languages simultaneously. Though much research has been dedicated to understanding how two languages interact, or co-activate, within proficient bilinguals, less is understood about how and when novice and intermediate learners develop similar cross-language interactions. Thus, the current study aimed to uncover at what stages during novice and intermediate L2 development co-activation can be detected. It also investigated possible mechanisms behind co-activation. Specifically, the study attempted to clarify if any detected co-activation amongst L2 learners is dependent on associations between lexical and conceptual representations, …

Monte Carlo Perturbation Analysis Of Fuel Temperature Variations In The Mcnp Model Of The Annular Core Research Reactor, Melissa Andrea Moreno

Nuclear Engineering ETDs

The Annular Core Research Reactor (ACRR) Monte Carlo N-Particle (MCNP) model is used for a variety of computational calculations ranging from reactor kinetics metrics to safety analyses. To understand the dominant source of uncertainty within the model, perturbations in temperature were applied to individual ACRR MCNP fuel rods. Assigning random temperatures, selected uniformly, from the operational temperature ranges of the fuel enables a study of uncertainty effects based on temperature variations. Stochastic mixing was used to blend the cross-sections of the desired temperatures using the MCNP continuous and Thermal Neutron Scattering Treatment (S(α,β)) libraries in ENDF/B-VII.1. The uncertainty quantification process …

A Quantitative Investigation Of Ovarian Cancer Disparities, Jimmy Valdes

Sociology ETDs

Ovarian cancer is the fifth most deadly form of cancer, and the leading cause of death among gynecologic malignancies in US women. Although this literature has empirically investigated parts of this phenomenon, several major gaps exist. First, this literature rarely attempts to theoretically contextualize the findings by explaining broader etiologies of ovarian cancer. It also does not attempt to explain how or why the social determinants of ovarian cancer disparity, primarily socioeconomic status and race, may be interrelated. Lastly, few studies have attempted to better understand the distinct ways in which Hispanics, as an ethnic group, fit into the ovarian …

Sex Differences In Running Performance: The Role Of The Anaerobic Speed Reserve In Female Middle-Distance Running, Lydia Charlotte Hallam

Health, Exercise, and Sports Sciences ETDs

Middle-distance running is an interesting domain in which to study sex differences in athletic performance because of the varied metabolic, mechanical and tactical demands. The Anaerobic Speed Reserve (ASR) represents the difference between an athlete’s maximal sprint speed (MSS) and maximal aerobic speed (MAS). The ASR and MSS are key determinants of elite male 800m performance (Sandford et al., 2018); however, the role of the ASR in female middle-distance running is unclear, considering sex differences in physiology, mechanics and competition factors. We found that sub-groups of female middle-distance runners could be distinguished using the ASR and speed reserve ratio (SRR …

Exploring The Interaction Of Amphiphilic Mycobacterial Lipoarabinomannan With Lipoproteins: Implications For Blood-Based Diagnosis, Shailja Jakhar

Biomedical Sciences ETDs

Currently, over one-third of the global population is infected with tuberculosis (TB), one of the world’s most deadly infectious diseases. The current gold standard for TB diagnosis is microbiological culture, which can take up to 6-8 weeks, which is not conducive to timely treatment. There are no reliable diagnostics for TB. Disease manifestation and outcome of diagnostic tests for TB are influenced by co-morbidities such as HIV co-infection, further complicating diagnostics development. Thus, there is a need for reliable diagnostics for TB. This is especially true in pediatric populations where the differential disease presentation further complicates outcomes.

This dissertation describes …

Μηδὲν Ἄγαν: Conviviality And Excess In The Symposium, Lauren B. Alberti

Foreign Languages & Literatures ETDs

This multi-disciplinary project demonstrates that the archaic and classical Greek symposium was a moralizing and educative space that governed the consumption of wine through the social protocol of the metron “measured restraint.” In Chapter One, I investigate sympotic drinking behavior contextualized within this concept of the metron as described by Theognis. Utilizing literary evidence and art historical representations of drinking at the symposium, I argue that a specified drinking protocol encouraged the community to benefit the male aristocratic citizen and ultimately their place in the polis. The symposium was an educative and moralizing space that encouraged communal harmony and …

Experiences Of Latino First-Year Students Utilizing A Wellness Model For Analysis At A Four-Year Institution In The Southwest, Chriselle Martinez

Individual, Family, and Community Education ETDs

This study was conducted to understand the experiences of wellness among Latino first-year students at a four-year institution in the Southwest. The Wellness Evaluation of Lifestyle (Meyers, Sweeny, & Witmer, 2001, 2004, 2011) was utilized as an analytical tool to further draw upon interview questions and themes. In hopes to inform a body of research in the area of counselor education and student affairs practitioners, this study is attempting to broaden the perspective on lived experience and understanding of wellness for Latino first-year students. The study is qualitative research with four identified themes that arose from the data. Interpretive Phenomenological …

William Blake's Satan As A Hermaphrodite, Genevieve E. Hartsock

Art & Art History ETDs

Depictions of Satan had started off with a grotesque and monstrous figure, but depictions of and attitudes towards the character shifted with the publication of John Milton’s Paradise Lost. However, although the aesthetics of the figure shifted, I argue that William Blake’s renderings of Satan continue the tradition of rendering them as monstrous and grotesque in a new way, in that Blake renders Satan as a hermaphrodite. Attitudes towards hermaphrodites has shifted over time, but the attitude of regarding them as unnatural or monstrous harkens back to ancient Greece, and these attitudes were only furthered with time and the advent …

Heterogeneously Integrated Photonic Modulators And High-Volume Manufacturing Of Related Technologies, Nicholas Adam Boynton

Electrical and Computer Engineering ETDs

Silicon photonics is an attractive approach to cost-effective integrated optics due to the infrastructure established for silicon CMOS electronics. The material properties of silicon however are not ideal for optical devices. Specifically, silicon lacks the ability to easily produce light-emitting devices due to its indirect bandgap, and has a centro-symmetric crystal structure which does not facilitate the Pockels effect required for linear modulation. Conversely, lithium niobate is an excellent optical material due to its strong Pockels effect but, is a notoriously difficult material to process. One method of simultaneously overcoming the material limitations of silicon and the fabrication limitations of …

Identification Of Variables For Hemoglobin A1c Prediction, Erica A. Richards

Doctor of Nursing Practice Scholarly Projects

An evolution in healthcare is taking place throughout our country. Healthcare providers are required to achieve an ever-growing number of regulatory and metric-driven standards. This transformation aims to improve both the quality and cost of healthcare in the United States. Diabetes mellitus (DM) is one of the most costly chronic diseases in the United States. Since DM has high mortality, high morbidity, and low quality of life rates, it is no wonder that DM is one of the focuses of the National Committee for Quality Assurance performance improvement tools known as the Healthcare Effectiveness Data and Information Set (HEDIS). In …

Erotic Ecology In Ovid's Heroides, Noah Holt

Foreign Languages & Literatures ETDs

This project demonstrates that natural imagery in the Heroides is an emotionally charged space that exists as more than just background description. The first chapter explores how descriptions of the pastoral landscape reflect the shifting love affair of Oenone and Paris: when the love is reciprocal, the pastoral landscape is idyllic and peaceful; once Oenone realizes her attempt to win Paris back is futile, the pastoral landscape becomes more antagonistic. Ultimately, Oenone’s rusticitas proves to be incompatible with Paris’ newly acquired cultus, which I suggest can be read as an expression of the opposition between modern refinement and renewal …

Changing And Transitioning Name Narratives: The De.E.P. Standpoints Of Identities, Pauline C. Alvarez

Communication ETDs

The Changing and Transitioning Name Narrative project is a replicated study from the Name Narrative Project (2014) by Montoya, Vasquez, and Martínez. The changing and/or transitioning of names relates to a Decolonial Embodiment Process (DE.E.P.) that speaks to an internal process of how individuals break away from colonial powers. Furthermore, the study highlights nine (eight volunteers and the author’s) Name Narratives to investigate their realities that express an individual experience and shared standpoints. Importantly, the changing and/or transitioning of names is not an act to disrespect parents or name givers, but a profound self-love indication that is represented through materialize …

Fundamental Dislocation Solutions For Infinite And Semi-Infinite Media, Luo Li Mr

Mechanical Engineering ETDs

Much research has gone into determining stress fields of dislocation, as the understanding of dislocations is fundamental to understanding metal or crystal plasticity. In this thesis, the stress field of a rectangular dislocation loop in an infinite isotropic solid is developed for a Volterra-type dislocation with three non-zero Burgers vector components. Also, the stress and strain fields of a rectangular dislocation loop in an isotropic solid, which is a semi-infinite medium, are obtained here for a Volterra-type dislocation. Moreover, analytical and numerical verifications of the developed stress/strain fields are performed. This is done by ensuring the satisfaction of the equilibrium …

Synthesis And Characterization Of Regioregular Cross-Conjugated Poly(Thienylene Vinylene)S, Yousef M. Katba Bader

Chemistry and Chemical Biology ETDs

Poly(thienylene vinylene)s (PTVs) is special a class of conjugated polymers (CPs) that show remarkable optoelectronic properties and promising applications. The main reason that hinders their application, is the lack of synthetic methodologies for preparing new derivatives with various functionality. Developing new PTVs with improved structures based on structure-property relationships increases the potential of utilizing this type of polymers in advanced applications. Most available preparation methods lead to regio-random PTVs (ra-PTVs) structures due to the different placement of the sidechain in the polymer backbone, which results in reduced crystallinity. In this study, we developed a novel strategy that produces a series …

Functional Changes In Fortified Places: Strategy And Defensive Architecture In The Medieval And Early Modern Eras, Scott Kirk

Anthropology ETDs

Castles – defined as the fortified residences of a militarized elite class – are a global, cross-cultural phenomenon rather than a historically particular development in medieval Europe. Pairing Niche Construction Theory (NCT) with the Lévi-Straussian concept of the House, this research combines architectural, statistical, and geospatial analyses for a sample of castles from medieval European, western colonial, and nonwestern societies to show: (1) castle building is a recurring feature of competition in stratified pre-industrial societies, (2) geography and topography constrain castle location and function, and (3) changes in castle placement, design and elaboration reflect the changing nature of social, economic …

Congress And The Fall Of Jacobo Arbenz: A Narrative Of Cold War Fears And Redemption, David Erik Lindwall

Latin American Studies ETDs

This thesis will examine the statements and actions of U.S. Congressmen and Senators between 1945 and 1996 to understand how they influenced White House policy towards the regime of Jacobo Árbenz. It will show how legislators equated growing communist influence in the Árbenz regime to Cold War struggles going on in Korea, Indochina and Eastern Europe, and how Congressmen from both parties drew on those fears to pressure Presidents Truman and Eisenhower to "neutralize the threat," leading to Árbenz’s fall. When violence erupted again in Guatemala in 1960-1996, Congress reinterpreted the story of Árbenz as Republicans and Democrats were polarized …

Challenging The Empirical Utility Of The Color-Blind Racial Attitudes Scale: Revisiting Factor Structure Across Race/Ethnicity And Gender Through Measurement Invariance, Alexandra Hernandez-Vallant

Psychology ETDs

The Color-Blind Racial Attitudes Scale (CoBRAS) is the most commonly used scale to measure domains of color-blind racial ideology (CBRI). CBRI broadly refers to the denial of racism on individual and societal levels. The factor structure of CoBRAS has yet to be rigorously tested to confirm the replicability of the factor structure and demonstrate measurement invariance across multiple groups. This study examined the factor structure, internal consistency reliability, and measurement invariance of the CoBRAS across race/ethnicity and gender in 911 diverse college students. Confirmatory factor analysis (CFA) and measurement invariance of the CoBRAS were tested across race/ethnicity (Black, Latinx, and …

Extension Of The Two-Step Approach For Informative Dropout In Survival Analysis, Cristina Murray-Krezan

Mathematics & Statistics ETDs

Chronic kidney disease (CKD) in children is known to result in poor growth and quality of life, and frequently results in kidney failure. The Chronic Kidney Disease in Children study (CKiD) is a prospective cohort study enrolling children ages 1 to 16 to assess health outcomes in children with CKD including the effects of declining glomerular filtration rate and the resulting consequences of growth failure on morbidity. Quantification of the magnitude of the risk for decreased kidney function and, ultimately, failure has been achieved through a variety of studies, often including cohort studies such as the CKiD study. Longitudinal studies …

On The Dynamic Generation Of Megagauss-Level Magnetic Fields On 100-Ns Timescales To Stabilize And Magnetize Pulsed-Power-Driven Liner Implosions, Gabriel A. Shipley

Electrical and Computer Engineering ETDs

This dissertation presents analysis of experiments and simulations executed to develop the auto-magnetizing liner concept (AutoMag) for use as an alternative premagnetization mechanism for MagLIF. Tests of each stage of AutoMag (magnetization, dielectric breakdown, and implosion) were executed on the Mykonos accelerator and the Z accelerator. Experiments demonstrate strong peak axial magnetic field production (20 – 150 T), dielectric breakdown initiation that depends on global induced electric field across the target, and a level of cylindrical implosion uniformity high enough to be useful for prospective fusion-fuel-filled (auto-magnetized MagLIF) experiments.

This dissertation also presents detailed simulations of the Solid Liner Dynamic …

Ashley Gurule Oral History Interview April 2021, Marisa Gurule

Oral Histories HIST300, Spring 2021

This interview was with Ashley Gurule who is an elementary ESL teacher in North Carolina. This interview covers the topic of the current education system, and its struggles and victories over the past two years.

Animal Texts: Critical Animal Concepts In Environmental Literature For The Anthropocene, Lauren Perry

English Language and Literature ETDs

This dissertation examines how key environmental texts from the late nineteenth, twentieth, and twenty-first centuries portray animals and the changing conception of animal lives. Beginning with short stories by Sarah Orne Jewett and Jack London, the first chapter examines how early environmentally-minded writers developed animals' independent subjectivity. The second chapter analyzes how Aldo Leopold’s A Sand County Almanac (1949) and Sarah Carson’s Silent Spring (1962) promote ecological awareness by paying attention to animal time. Chapter three argues that Edward Abbey’s Desert Solitaire (1968) develops a layered understanding of animal consciousness. Chapter four contends that Terry Tempest Williams’ Refuge (1991) merges …

Computational_Electromagnetic Modeling (Cem) Of Foliage Penetration (Fopen), Monica R. Jaramillo

Electrical and Computer Engineering ETDs

Foliage penetration (FOPEN) radar at lower frequencies (UHF, VHF) is a well-studied area with a wide set of contributions. However, there is growing interest in using higher Ku-band frequencies (12-18 GHz frequency range) for FOPEN. In particular, the reduced wavelength sizes (centimeters range) provide some key saliencies for developing more optimized foliage detection solutions. The disadvantage is that exploiting Ku-band for FOPEN is complicated because higher frequencies have much more pronounced scattering effects due to their smaller wavelengths. Despite these challenges, certain foliage characteristics and signal parameters can help improve electromagnetic (EM) wave penetration in the Ku-band such as foliage …

Chemistry & Chemical Biology 2021 Apr Self-Study & Documents, University Of New Mexico

UNM Academic Program Review

UNM Chemistry & Chemical Biology APR self-study and review team report for Spring 2021, fulfilling requirements of the Higher Learning Commission.

Earth & Planetary Sciences 2021 Apr Self-Study & Documents, University Of New Mexico

UNM Academic Program Review

UNM Department of Earth & Planetary Sciences APR self-study and review team report for Spring 2021, fulfilling requirements of the Higher Learning Commission

Speech & Hearing Sciences 2021 Apr Self-Study & Documents, University Of New Mexico

UNM Academic Program Review

UNM Department of Speech & Hearing Sciences APR self-study and review team report for Spring 2021, fulfilling requirements of the Higher Learning Commission.

International Studies Institute 2021 Apr Self-Study & Documents, University Of New Mexico

UNM Academic Program Review

UNM International Studies Institute APR self-study report and review team report for Spring 2021, fulfilling requirements of the Higher Learning Commission

Project C.O.P.E Sexual Health Intervention On Sexual Negotiations Skills Among Black And Hispanic Adolescents In An Under-Resourced Northeastern Urban Community, Irene N. Cantu

Individual, Family, and Community Education ETDs

Decades of sexual health interventions have focused on the disparities youth of color face; however, inequalities in health outcomes and resources remain. This study evaluated Project C.O.P.E. (Communities Organizing for Prevention and Empowerment), a sexual health intervention in an under-resourced northeastern urban community. The goal of the study was to determine if the intervention, personal domains (ethnic identity and family support), or sexual health domains (Viral Hepatitis [VH] knowledge and human immunodeficiency virus [HIV] knowledge) had an impact on sexual negotiation skills in Black and Hispanic adolescent participants (n =510; M_age =16.78 ± 1.14). Between group analyses found significant …