Digital Commons Network^™

A Landscape On The Threshold Of Change: Patterns Of Soil Microbial Ecology Along Dynamic Geomorphic And Hydrologic Features In A Polar Desert, Kelli L. Feeser, David James Van Horn, Heather N. Buelow, Daniel R. Colman, Theresa A. Mchugh, Jordan G. Okie, Egbert Schwartz, Cristina D. Takacs-Vesbach, Becky A. Ball, Andrew G. Fountain, Michael N. Gooseff, Joseph S. Levy, Maciej K. Obryk

Biology ETDs

The McMurdo Dry Valleys (MDV) of Antarctica are on the threshold of widespread landscape scale change due to increasing temperature and solar radiation and altered hydrology: buried ice is melting, the soil active layer is thickening, thermokarst features are developing along streams, water tracks are expanding, and lake levels are rising. These changes will impact the microbial communities found in each of the affected habitats. The purpose of this work is to first, understand the spatial distribution of soil bacteria in the MDV, specifically investigating the scale-dependent effects of environmental heterogeneity, and second, to perform surveys and coupled experiments to …

Coulombic And Non-Coulombic Effects Of Single And Overlapping Electric Double Layers With Surface Charge Regulation, Raviteja Vangara

Chemical and Biological Engineering ETDs

The physical origin of charged interfaces involving electrolyte solutions is in the thermodynamic equilibrium between the surface reactive groups and certain dissolved ionic species in the bulk. This equilibrium is very strongly dependent on the precise local density of these species, also known as potential determining ions in the solution. The latter, however, is determined by the overall solution structure, which is dominated by the large number of solvent molecules relative to all solutes. Hence, the solvent contribution to the molecular structure is a crucial factor that determines the properties of electric double layers. Models that explicitly account for the …

Direct Observation Of Atomic Exchange During Surface Self-Diffusion, Matthew Aaron Koppa

Physics & Astronomy ETDs

The diffusion of adatoms across the (100) plane of iridium has been previously inferred to occur by an exchange mechanism based on site mapping. This study provides the first direct observation that surface self-diffusion can occur by exchange. Iridium enriched to ≥93% ¹⁹¹Ir was deposited onto an atomically clean and smooth Ir(100) plane as observed in an atom probe field ion microscope. Following thermally activated surface self-diffusion the adatom was field desorbed and mass analyzed. Observation of the ¹⁹³Ir isotope in one-half of the cases demonstrates conclusively that atomic exchange can occur during surface self-diffusion.

A Pedagogic Analysis Of Linear Algebra Courses, Andrew Taylor

Mathematics & Statistics ETDs

This project is concerned with investigating the question, "Do our applied linear algebra courses (at the University of New Mexico) adequately prepare STEM students for future work in their respective fields?" In order to explore this, surveys were issued to three groups (sections) of students (among two different instructors) at the conclusion of their applied linear algebra course, as well as STEM professors/instructors from a variety of STEM fields. Students were surveyed regarding their perceived mastery of given topics/ideas from the course and professors/instructors were surveyed about the level of mastery they felt was necessary (referred to as ``desired mastery") …

Implications Of The Modifiable Areal Unit Problem For Wildfire Analyses, Timothy P. Nagle-Mcnaughton, Xi Gong, Jose A. Constantine

Geography and Environmental Studies Faculty Publications

Wildfires pose a danger to both ecologies and communities. To this end, many large-scale analyses of wildfire patterns and behavior rely on the aggregation of point data to polygons, typically those based on distinct disparate ecological areas. However, the sizes, shapes, andorientations of the polygons to which data are aggregated are not neutral factors in the resulting analysis. The influence of the aggregation polygons on calculated results is known as the modifiable areal unit problem (MAUP), which is well-documented in the spatial statistics literature. Despite the documentation of the MAUP, relatively few wildfire studies consider the effects of the MAUP …

An Investigation Of The Chemistry, Thermodynamics And Catalytic Activity Of Molybdenum Carbides, Shanti Kiran Nayak

Chemical and Biological Engineering ETDs

These studies investigate the chemistry and stability of molybdenum carbides as an electrocatalyst. Due to their unique electronic properties, molybdenum carbides are purposed as electrocatalysts for reaction systems such as hydrogen evolution reaction, bifunctional water splitting and CO oxidation.

In this study, various synthesis processes were utilized to produce different types of molybdenum carbide with varying properties of particle size, surface area and excess carbon. The samples characterized by XRD accompanied by Whole Profile Fitting, Electron Microscopy, Gas Adsorption (surface area) and XPS.

These synthesis processes were refined using fundamental thermodynamic analyses. These analyses highlight regions of stability of different …

“Where Are You From?”: Using Critical Race Theory To Analyze Graphic Novel Counter-Stories Of The Racial Microaggressions Experienced By Two Angry Asian Girls, Talitha Angelica Acaylar Trazo, Woohee Kim

Intersections: Critical Issues in Education

This article uses critical race theory (CRT) to analyze two stories about racial microaggressions from Where Are You From?: Short stories about being Asian in America, the graphic novel written and illustrated by Talitha Angelica Acaylar Trazo in fulfillment of her undergraduate honors thesis. Where Are You From? visually historicizes the counter-stories of 48 Asian and Asian American students at a predominantly-white undergraduate institution. In this article, we examine these microaggressions in relation to institutional and structural racism and the intersections of race, gender, and power dynamics between white faculty and Asian female students. Furthermore, we propose …

Utilizing A Critical Literacy Framework To Discuss Issues Of Power And Privilege With Elementary Students, Barbara A. Pollard

Intersections: Critical Issues in Education

This action research study utilizes a critical literacy framework to bring issues of privilege and power into critical dialogue with elementary students. The study is based on the idea that disadvantaged groups can eventually agitate for societal change if they are prompted to begin to critically question systemic inequalities from a young age. Thus, instead of allowing dominant culture to dictate unfair norms and practices by simply abiding to the status quo, this study suggests that elementary teachers should aim to be the vehicle for transformational change by implementing pedagogy that encourages students to think deeply and critically. Over time, …

Disrupting Dis/Abilization: A Critical Exploration Of Research Methods To Combat White Supremacy And Ableism In Education, Sara H. Petit-Mcclure, Chelsea Stinson

Intersections: Critical Issues in Education

The following paper explores the way scientific research, as it is commonly defined, has been used to continue the marginalization and subsequent dis/abilization of students based on racial, cultural, and linguistic identities. Starting with a historical perspective, we trace the role of scientific research in the support of white supremacist, ableist societal mechanisms, as well as the emphasis on scientifically-based research in educational policy and practice. We call for an expansion of the definition of scientific research to emphasize mixed and multiple methods guided by the principles of participatory, emancipatory, and decolonizing methodologies.

Reconstructing Energy Flow Through Modern And Historical Marine Communities: Insights From Amino Acid Isotope Analysis, Emma A. Elliott Smith

Biology ETDs

The fundamental currency of life is energy. Organisms need energy to grow, to survive and to reproduce. Understanding the acquisition of energy by consumers is thus a foundational aspect of biological research. This is especially important in the modern era, as impacts of ongoing anthropogenic effects will be mediated or amplified through food webs. Here, I explore how isotopic analysis of individual amino acids – a technique new to ecological studies – can be used to trace energy flow through animal communities in modern and ancient time periods. In particular, I focus on kelp forest food webs, which are nearshore …

Oral Development And Breastfeeding: An Assessment Of The Lactation Care Provider Approach, Robin Gatlin

Dental Hygiene ETDs

Breastfeeding influences the infant’s oral development in many ways. Lactation care providers work closely with the mother-infant pair and may be the first to provide information on oral health. The purpose of this study is to assess lactation care provider’s perception, attitude and behavior on the relationship between breastfeeding and oral development; including oral malocclusion, breathing patterns, tethered oral tissues and dental caries. A survey sent to lactation care providers who are members of The United States Lactation Consultant Association. A total of 12 members participated in the survey. Of that, 11 were International Board Certified Lactation Consultants (IBCLCs) and …

Diversification, Paternalism, And The Transnational Threads Of Cotton In Southern New Mexico The Industrial Ideal At Work At Stahmann Farms, 1926–1970, William Carleton

New Mexico Historical Review

No abstract provided.

Diversification And Biogeography Of An Indo-Pacific Bird Radiation (Pachycephalidae), Serina S. Brady

Biology ETDs

The utility of islands as natural laboratories of evolution is exemplified in the patterns of differentiation in widespread, phenotypically variable lineages. Pachycephalidae is one of the most complex avian radiations spanning the vast archipelagos of the Indo-Pacific, making it an ideal group to study the patterns and processes of diversification on islands. Here, we present a robust phylogenetic hypothesis for all five genera within Pachycephalidae, based on thousands of ultraconserved elements (UCEs) generated with a target-capture approach and high-throughput sequencing. We clarify certain taxonomic relationships within Pachycephala and discover that Wallacea plays a much larger role in pachycephalid evolutionary history …

Influence Of Metabolic Capacity On The Consequences Of Spreading Depolarization, Katelyn M. Reinhart

Biomedical Sciences ETDs

In the United States, stroke is the fifth leading cause of death and stroke survivors often face long-term disability. After ischemic stroke, the ischemic territory can expand and recruit previously viable tissues into the lesioned area. During this critical period, there is an unsettling lack of interventions that prevent or treat secondary neuronal loss and cognitive decline. Clinical subdural recordings have revealed a close link between infarct progression and waves of spreading depolarizations (SD) in the acutely injured brain. SD is a slowly progressing wave of near-complete neuroglia depolarization that is extremely energetically demanding and this additional metabolic ‘hit’ …

Mechanisms And Consequences Of Myb Gene Activation In Salivary Gland Tumors, Candace Frerich

Biomedical Sciences ETDs

Salivary gland adenoid cystic carcinoma (ACC) is an aggressive tumor with a tendency to infiltrate surrounding nerves and metastasize to distant sites. The standard treatment often fails to control local tumor recurrence and distant metastases and no approved targeted therapeutic options exist for these tumors. The goal of our studies was to reveal the molecular mechanisms driving ACC tumor development and novel drug targets to improve patient morbidity and mortality.

We first analyzed clinical and RNA-sequencing (RNA-seq) data for 68 formalin-fixed paraffin-embedded (FFPE) ACC tumor samples and described previously unappreciated molecular heterogeneity that predicts patient outcome. The poor outcome subgroup …

Effects Of Temperature And Nitrogen Depletion On Biodiesel Production Under Saline Conditions By A Mixed Algal Community, Sarah J. Kintner

Nanoscience and Microsystems ETDs

The overall objective addressed in this research was to gain a better understanding of how native mixed cultures of phototrophic microorganisms from a saline system may be used for biodiesel production. Laboratory batch reactors were grown under variable temperatures and nitrogen concentrations with original inoculum from a hypersaline pond in central New Mexico. Growth at 40 C° led to lower lipid production, lower nitrate consumption, and less diverse communities than growth at 20° C. All communities were dominated by the cyanobacteria Plectonema except the in second experiment, where they were only 30% of the culture. In a second experiment with …

Little Farm Hands: Rural Child Labor, Family, And Memory In The U.S. Southwest, 1890-1940, Jairo E. Marshall

History ETDs

Child labor was a traditional subsistence and agricultural practice throughout the rural Southwest. Between 1890 and 1940 a series of changes occurred within agriculture, ranching, and rural land/labor patterns in New Mexico and Texas. However, child labor remained a useful economic strategy for families well into this period, because it remained grounded in environmental challenges, cultural practices, agrarian ideologies, and children’s social and physical development. Agribusinesses took advantage of this labor pool, while schools and communities continued to allow children to labor, believing it to be either necessary or beneficial.

Families and children continued to have agency to determine the …

Building Capacity For Collaborative Research On Opioid And Other Substance Use Disorders Through The Clinical And Translational Science Award Program, Linda B. Cottler, Alan I. Green, Harold Alan Pincus, Scott Mcintosh, Jennifer L. Humensky, Kathleen Brady

Project ECHO Bibliography

The opioid crisis in the USA requires immediate action through clinical and translational research. Already built network infrastructure through funding by the National Institute on Drug Abuse (NIDA) and National Center for Advancing Translational Sciences (NCATS) provides a major advantage to implement opioid-focused research which together could address this crisis. NIDA supports training grants and clinical trial networks; NCATS funds the Clinical and Translational Science Award (CTSA) Program with over 50 NCATS academic research hubs for regional clinical and translational research. Together, there is unique capacity for clinical research, bioinformatics, data science, community engagement, regulatory science, institutional partnerships, training and …

Source-Separated Urine Nitrification And Ion Accumulation In Sub-Irrigated Planters Using Domestic Wastewater, David A. Forrest

Civil Engineering ETDs

Wastewater reuse is a field at the crux of the food-energy-water nexus. This nexus is a modern attempt at qualifying relationships between resource availability and stewardship, and the choices and needs of market-driven culture. This study aims to develop simple low-tech systems to use domestic wastewater or source-separated urine, treated onsite, for domestic container garden water and nutrient supply. Four experiments were conducted to assess specific aspects of this technology to help develop relevant stages in this reuse chain.

The objective of the first experiment was a proof of concept to assess compatibility of sub-irrigated planters (SIP) with treated domestic …

Neuron Specific Gene 2 (Nsg2): A Novel Regulator Of Excitatory Neurotransmission Via Ampa Receptor Trafficking At A Subset Of Glutamatergic Synapses, Praveen Chander

Biomedical Sciences ETDs

Members of the Neuron-Specific Gene family (NSG1-3) play critical roles in excitatory synaptic transmission via regulation of AMPA receptor surface expression within the post-synaptic density (PSD). While NSG1 and NSG3 regulate AMPAR recycling and endocytosis, respectively, the function of NSG2 has remained elusive. Here we undertook a series of studies to assess the role of NSG2 in excitatory synaptic transmission. We found that a portion of NSG2 punctae localized with HOMER1 and surface AMPARs at excitatory synapses and that NSG2 AMPAR subunits in mouse brain. Knockout of NSG2 selectively impaired the frequency of AMPA mEPSCs, while overexpression caused a significant …

Amaro E Piccante: The Production And Use Of Terroir In The Scandal Of Italian Extra Virgin Olive Oils, Daniel Gene Shattuck Ii

Anthropology ETDs

This dissertation explores the revalorization of Italian extra virgin olive oils after a food scare that revealed some oils to be inauthentic or adulterated. In the process of distinguishing products, producers and tasters looked toward terroir or the “taste of place” as proof of their declarations of authenticity and as a method for differentiating oils. However, in this attempt, they engaged with other pervasive tropes of difference including those that intersected with belonging, the local and global, and race. This dissertation argues that terroir is a material-semiotic object; that while it may be grounded in the materiality of oils is …

Seventeenth-Century Spanish Colonial Identity In New Mexico: A Study Of Identity Practices Through Material Culture, Caroline Marie Gabe

Anthropology ETDs

This dissertation explores how seventeenth-century Spanish colonial households expressed their group identity at a regional level in New Mexico. Through the material remains of daily practice and repetitive actions, identity markers tied to adornment, technological traditions, and culinary practices are compared between 14 assemblages to test four identity models. Seventeenth-century colonists were eating a combination of Old World domesticates and wild game on colonoware and majolica serving vessels, cooking using Indigenous pottery, grinding with Puebloan style tools, and conducting household scale production and prospecting. While assemblages are consistent in basic composition, variations are present tied to socioeconomic status. This blending …

Npr's Tiny Desk Concert Series: Vocalities Of Outrage And Acts Of Gaiety, Aubrie M. Powell

Music ETDs

The Tiny Desk concert series features live video-recorded performances of artists at the desk of NPR Music’s Bob Boilen, the series’ main host. This thesis interrogates NPR Music’s values and the ways artists both manifest and queer those ideals in performance. I argue, in light of the 2016 election, performers challenge NPR Music’s taste system through two modes of subversion. The first mode considers vocalities of outrage specifically in the performances of Saul Williams and the Drive-By Truckers. These performers shift their social positions in expressions of outrage through vocality—as the embodied materiality of the voice and its constructed meanings …

Assessment Of Particulate Matter Toxicity And Physicochemistry At The Claim 28 Uranium Mine Site In Blue Gap, Az, Jessica G.S. Begay

Biomedical Sciences ETDs

Particulate matter (PM) inhalation is known to have adverse effects on the respiratory and cardiovascular systems. Community concerns in the southwestern US have been expressed in regions of extensive open-pit hard-rock (especially uranium) mining that windblown dusts may pose an excess health risk. To address these concerns, we have undertaken a campaign to detail: (1) the amount and composition of the PM_2.5 in the region, (2) meteorological characteristics, such as wind speed and direction, and (3) and immunological and physiological responses of mice after PM_2.5 exposures.

For toxicity studies, C57BL/6 and apolipoprotein E-null (ApoE^-/-, a vascular …

The Association Of Psychological Distress And Mental Health With English Language Acquisition Of Recently Resettled Refugees In The United States, Charlisa C. Christian

Sociology ETDs

Host country language proficiency among resettled refugees has been associated with better mental health; yet, in qualitative studies, refugees describe psychological distress acting as a barrier to their learning. To clarify varying results, this longitudinal study of refugees from Africa, the Middle East, and Afghanistan (n=290) examined language acquisition with positive mental health and psychological distress as distinct concepts on correlated unipolar dimensions (Keyes 2002; Rumbaut 1989). With multilevel modeling, initial English speaking ability was significantly related to increasing positive mental health over time, indicating host country language proficiency acts as a protective factor for refugees, and supporting the growing …

Calling All Corpses: An Examination Of The Treatment Of The Dead In Old English Literature, Jessica Troy

English Language and Literature ETDs

The care and disposal of the dead bodies, an unavoidable reminder of one’s mortality, rarely receives in-depth literary attention. In early medieval England, the Anglo-Saxons dealt with corpses but seldom discussed the undertaking in written documents. Instead they focused on the grandiose deeds of heroes like Beowulf and the holy lives of revered saints.

This dissertation examines various genres of Old English literature to identify times when authors discuss corpses and to what end these discussions led. Hagiographers, for example, describe the corpses of certain saints such as Æthelthryth and Edmund at length while the bodies of other saints are …

Software Design For Probabilistic Safety: Stochastic Reachability And Circadian Control, Joseph D. Gleason

Electrical and Computer Engineering ETDs

Stochastic reachability is an important verification tool that provides probabilistic assurances of safety in a variety of contexts. In engineered systems, safety may be synonymous with the ability of the system to avoid "bad" constraints on the state space, that constitute collision, departure from a flight envelope, or other undesirable phenomenon. In biomedical systems, assurance of safety (such as the mandate to ``do no harm'') are considerably complicated by the fact that there is a lack of physics-driven models, extensive signal processing is needed to capture the underlying state of the system, and the stochasticity inherent to the system may …

Mrg-Cap Symposium Agenda, Middle Rio Grande Conservancy District, Utton Transboundary Resources Center, Natural Heritage New Mexico, Colorado Natural Heritage Program, Unm Museum Of Southwestern Biology, Sustainable Water Resources, Unm

Middle Rio Grande Conservation Action Plan Symposium (2019)

No abstract provided.

Dynamics Of Avian Elevational Ranges Reveal Hidden Evolutionary Forces, Chauncey R. Gadek

Biology ETDs

The distribution of life across the Andes mountains reflects historical elevational-range contraction and expansion. Whereas contraction implies specialization, expansion requires overcoming hidden barriers. Three eco-evolutionary phenomena may drive patterns in rates of elevational range evolution: (1) The Dobzhansky-MacArthur Phenomenon (DMP) predicts lower rates of upward expansion with harsher physical conditions, while downward expansion increases with lower diversity; (2) the evolutionary tendency toward specialization predicts contraction increases when ranges are broad; and (3) natural selection for respiratory performance could suppress expansion across mid-elevations due to gene-environment mismatch. We modeled elevational range shifts of Neotropical landbirds. Contrary to the DMP, upward expansion …

Chronic Environmental Exposure To Metal Mixtures In Tribal Populations And Potential Immune System Effects, Jennifer J. Ong

Biomedical Sciences ETDs

Hardrock mining in the United States (US) has left a legacy of mixed metal mine waste sites. Wastes may contain multiple metals of health concern, including arsenic, cadmium, lead, mercury, and uranium, among others. Mining waste sites are disproportionately located on or contiguous to the watersheds of tribal lands. Due to proximity, and because of reliance on natural resources to maintain traditional diets and customs, Native American communities’ contact with multiple metals is often increased. Two impacted communities are the Cheyenne River Sioux Tribe (CRST) and Navajo Nation. Both tribes have expressed concerns that metals in mine waste adversely affect …