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Echo: A Graphical User Interface Designed To Simulate, Study, And Mitigate Effects Of Interplanetary Communication Delays In Analog Missions, Dario Gabriel Schor Aug 2024

Echo: A Graphical User Interface Designed To Simulate, Study, And Mitigate Effects Of Interplanetary Communication Delays In Analog Missions, Dario Gabriel Schor

Theses and Dissertations

Due to the vast distances between Earth and other planets, future human interplanetary missions will experience significant communication delays. The literature suggests that a combination of training, protocols, procedures, and tools is required to mitigate the negative impact that the communication delay has on both stress and performance. This research introduces a tool called ECHO that combines known and novel features designed to make users cognizant of the delay and avoid misunderstandings. ECHO was tested as part of a mixed-methods study over the course of three analog missions at the University of North Dakota's Integrated Lunar/Mars Habitat where a total …

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Sustainable Synthesis: An Emphasis On Green Chemical Reactions Using Eco-Uva Light For [2+2] Photocycloadditions Of Furan Derivatives, Sierra Rose Ward Aug 2024

Sustainable Synthesis: An Emphasis On Green Chemical Reactions Using Eco-Uva Light For [2+2] Photocycloadditions Of Furan Derivatives, Sierra Rose Ward

Theses and Dissertations

The first section of this study investigates the effect of low temperatures on [2+2] photocycloaddition reactions of a furan derivative, furyl acrylic acid, which can be derived from biomass, and its effect on various photoactive monomers. The experiments demonstrated that the furan derivative could dimerize in extreme temperatures (-196 oC) using liquid nitrogen with up to 82% conversion. The second chapter is dedicated to developing a more environmentally friendly reaction procedure for a different furan derivative, maleic anhydride, with simple olefins (specifically cyclohexene and 1-hexene). Traditionally, these reactions were performed with medium-pressure mercury lamps, conventional photochemical reaction vessels, and flow …

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Transcriptional Landscape Of Foxp3+ Regulatory T Cells Under Mitochondrial Oxidative Stress: Implications For Inflammaging, Jappreet Singh Gill Aug 2024

Transcriptional Landscape Of Foxp3+ Regulatory T Cells Under Mitochondrial Oxidative Stress: Implications For Inflammaging, Jappreet Singh Gill

Theses and Dissertations

This thesis explores the intricate relationship between mitochondrial oxidative stress and the function of FOXP3+ regulatory T cells (Tregs), highlighting their essential roles in the aging immune system and the development of age-related diseases. The study delves into how mitochondrial impairments within Tregs contribute to widespread inflammation leading to pathological aging. One key analysis shows that mitochondrial oxidative stress undermines Treg functionality, intensifying inflammatory responses and increasing frailty in older adults. This dysfunction is associated with elevated inflammatory markers and presents a potential target for therapeutic interventions aimed at restoring mitochondrial health to alleviate these impacts. Another significant discovery connects …

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The Association Between Social Media, Toxic Masculinity, And Depression In Young Adult Males, Anthony Warren Aug 2024

The Association Between Social Media, Toxic Masculinity, And Depression In Young Adult Males, Anthony Warren

Dissertations

The world is shaped by diverse influences that significantly affect individuals’ internal landscapes, leading to both positive and negative effects with profound implications for society. Role models play a pivotal role in shaping the aspirations of young adult males by providing direct and indirect lessons that leave lasting impressions and influence their worldview. In recent years, social media use, toxic masculinity, and mental health have garnered significant attention in understanding the experiences of young adult males. The focus in this study was to examine the relationships between social media use, toxic masculinity, and depression in young adult males ranging in …

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Robust Hydropower Planning Balances Energy Generation, Carbon Emissions And Sediment Connectivity In The Mekong River Basin, M. Tangi, Rafael Schmitt, Rafael M. Almeida, S. Bossi, Alexander S. Flecker, F. Sala, A. Castelletti Aug 2024

Robust Hydropower Planning Balances Energy Generation, Carbon Emissions And Sediment Connectivity In The Mekong River Basin, M. Tangi, Rafael Schmitt, Rafael M. Almeida, S. Bossi, Alexander S. Flecker, F. Sala, A. Castelletti

School of Earth, Environmental, & Marine Sciences Faculty Publications

We present a framework for strategic dam planning under uncertainty, which includes GHG emissions mitigation as a novel objective. We focus on the Mekong River Basin, a fast‐developing region heavily relying on river‐derived ecosystem services. We employ a multi‐objective evolutionary algorithm to identify strategic dam portfolios for different hydropower expansion targets, using process‐related and statistical models to derive indicators of sediment supply disruption and GHG emissions. We introduce a robust optimization approach that explores variations in optimal portfolio compositions for more than 5,000 state‐of‐ the‐world configurations, regarding sediment origins and trapping and GHG emissions. Thus, we can rank dam projects' …

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Hydroxyapatite Of Cow Bone Used As Filler To Enhance Compressive Strength Characteristics In Composite Restoration, Syamsiah Syam, Nur F. Arifin, Risnayanti Anas Aug 2024

Hydroxyapatite Of Cow Bone Used As Filler To Enhance Compressive Strength Characteristics In Composite Restoration, Syamsiah Syam, Nur F. Arifin, Risnayanti Anas

Journal of Dentomaxillofacial Science

Objective: The goal of the current study is to ascertain whether hydroxyapatite from cow bones could potentially be used as a filler to improve the compressive strength characteristics of composite fillings. Material and Methods: The composite filling material used in the test group was self-processed and comprised filler derived from hydroxyapatite of cow bones, which were synthesized via an alkaline hydrothermal method.  A composite material manufactured at a factory with silica filler served as the control group. Each group was formed into 16 slabs, each measuring 2 mm thick and 6 mm in diameter. The slabs were polymerized using light …

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Math Meets The Clinic: Modeling Patient Specific Hnscc Radiation Response Dynamics, Rohan Vijayvikram, Pirmin Schlicke, Mohammad U. Zahid, Dina M. El-Habashy, Cem Dede, Clifton D. Fuller, Heiko Enderling Aug 2024

Math Meets The Clinic: Modeling Patient Specific Hnscc Radiation Response Dynamics, Rohan Vijayvikram, Pirmin Schlicke, Mohammad U. Zahid, Dina M. El-Habashy, Cem Dede, Clifton D. Fuller, Heiko Enderling

Radiation Oncology Medical Student Program 2024

Head and neck squamous cell carcinomas (HNSCCs) originate from the mucosal lining of the upper aerodigestive tract and radiation therapy has become a fundamental component in the standard care for these patients. However, the treatment's unique dynamics can lead to disparities in outcomes and biological responses in both tumor and normal tissues. A significant challenge remains in predicting individual patient responses to radiation, with variability often resulting in under or over-treatment and potentially adverse effects. The absence of reliable biomarkers highlights the need for predictive measures to guide clinical decisions in real-time. The integration of mathematical models in radiation therapy …

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Adaptation To The Impacts Of Climate Change On Water Availability In The Upper Red River Of The North (Urrn), Innocent Kelechi Anosike Aug 2024

Adaptation To The Impacts Of Climate Change On Water Availability In The Upper Red River Of The North (Urrn), Innocent Kelechi Anosike

Theses and Dissertations

In the Upper Red River of the North (URRN), climate change has appeared to impact water availability, causing several major floods in recent years, and raising questions about whether climate change is responsible for the frequent occurrence of flooding in this major agricultural region in the Midwest USA. This thesis centers on investigating adaptative measures to mitigate the impacts of climate change in the URRN. One of the methods used is to compare changes in the outcomes of flood frequency analysis (FFA) for “before (pre-industrial) and after (industrial)” time periods. The study uses a combination of data analysis and literature …

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Evaluation And Mitigation Of Wildlife-Vehicle Collisions In North Dakota, Amalie Victoria Joergensen Aug 2024

Evaluation And Mitigation Of Wildlife-Vehicle Collisions In North Dakota, Amalie Victoria Joergensen

Theses and Dissertations

Annually, 365 million vertebrates are estimated killed in wildlife-vehicle collisions (WVC) in the US. Not only is this a threat to wildlife species, but it causes more than 25,000 human injuries, 200 human deaths, and over $10 billion in damage costs. North Dakota has a high rate of WVCs where more than 18 % of all collisions involve wildlife. Based on North Dakota Department of Transportation (NDDOT) crash data, we identify factors that affect the number of WVCs in North Dakota, and how these differ between different crash reporting methods. Additionally, we locate the WVC hotspots in North Dakota and …

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Maturational Changes In The Epigenome And Transcriptome Of Hypothalamic Astrocytes: Implications For Axonal Regeneration, Abiodun Ebenezer Odufuwa Aug 2024

Maturational Changes In The Epigenome And Transcriptome Of Hypothalamic Astrocytes: Implications For Axonal Regeneration, Abiodun Ebenezer Odufuwa

Theses and Dissertations

Axon regeneration is essential for effective repair following injury in the CNS. One of the burdens of aging is the lack of recovery following injury in the CNS. Our previous studies show that in 35-day-old rats, axon regeneration occurs in response to a unilateral hypothalamic lesion in the hypothalamus neurohypophyseal system. However, this regenerative ability is lost in 125-day-old rats. Furthermore, treatment of hypothalamic organotypic culture with ciliary neurotrophic factor (CNTF) promotes axonal outgrowth and survival. Our previous studies suggest that astrocytes may be playing critical roles in this maturational loss of regenerative capacity because only astrocytes expressed all the …

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Opencast: Cyanobacteria Growth And Correlations With Predictive Factors In Creation For Harmful Algal Bloom Formation, Devarshi Nikhil Patel Aug 2024

Opencast: Cyanobacteria Growth And Correlations With Predictive Factors In Creation For Harmful Algal Bloom Formation, Devarshi Nikhil Patel

Theses and Dissertations

Harmful Algal Blooms (HABs) are a significant threat to aquatic ecosystems, public health, and local economies due to their production of toxins and negative impacts on water quality. This thesis investigates the correlations between cyanobacteria growth and environmental variables, including wind conditions, surface temperatures, and nutrient levels. This research uses machine learning and statistical modeling to predict HAB occurrences by analyzing these variables' historical and near real-time data. The findings indicate that wind speed, surface temperature, and nutrient levels influence cyanobacteria dynamics, with specific thresholds identified for predictive accuracy. The developed HAB predictive models and the graphical user interface (GUI) …

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Pl 93-638: Utilizing The Indian Self Determination And Education Assistance Act (Isdeaa) To Enhance And Improve Oral Health Outcomes In A Tribal Community, Adriann Darlene Ricker Aug 2024

Pl 93-638: Utilizing The Indian Self Determination And Education Assistance Act (Isdeaa) To Enhance And Improve Oral Health Outcomes In A Tribal Community, Adriann Darlene Ricker

Theses and Dissertations

American Indians and Alaskan Natives experience the worst oral health outcomes. However, we are transitioning to a new era where Indigenous communities are reclaiming the narrative and health. This dissertation in practice was inspired by tribal self-determination and reclamation of health found through the newly established Fort Peck Tribal Health Dental Department utilizing the Indian Self Determination and Education Assistance Act (PL 93-638). The guiding framework for the Fort Peck Tribal Health Dental Department and this dissertation is the Indigenous Primary Health Care Delivery Model which illuminates elements of community, empowerment, and self-determination with culture as center to all healthcare …

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Engineered Nucleic-Acid Binding Intrinsically Disordered Proteins For Biomedical Applications, Telmo Diez Perez Aug 2024

Engineered Nucleic-Acid Binding Intrinsically Disordered Proteins For Biomedical Applications, Telmo Diez Perez

Biomedical Engineering ETDs

This dissertation explores the use of intrinsically disorder proteins (IDPs) in biomedical applications related to the detection and biosensing of nucleic-acid species. We engineer several low critical solution temperature (LCST) nucleic-acid binding elastin-like polypeptides (ELPs) as model IDPs and study their potential in biomedical application via interactions with short single-stranded (ss) DNA, tRNA and viral RNAs. First, we engineer a simple polycationic ELP capable of recruiting DNA on demand in a DNA-protein-rich condensate via LLPS. Moreover, we develop a modified Flory-Huggins theory to quantify the partitioning of DNA and protein upon coacervate formation with and without salts. We then design …

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Faculty Perceptions About Instructional Accommodations For Students With Social Anxiety Disorder, Jessie Frances Edith Tudor-Tangeman Aug 2024

Faculty Perceptions About Instructional Accommodations For Students With Social Anxiety Disorder, Jessie Frances Edith Tudor-Tangeman

Walden Dissertations and Doctoral Studies

The problem examined was that post-secondary faculty experience challenges related to providing responsive accommodations to post-secondary students who self-identify with a diagnosis of social anxiety disorder (SAD). The purpose of this study was to investigate post-secondary faculty’s perceptions of their ability to make responsive instructional modifications beyond the preliminary accommodations mandated by university disability services for post-secondary students who self-identify as experiencing SAD. The conceptual framework that grounds this study was Clark and Wells’ (1995) cognitive model of social phobia. The research questions focused on the perceptions of post-secondary faculty in relation to their ability to make responsive instructional modifications …

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Preschool Executive Control And Adolescent Dietary Outcomes: Highlighting The Role Of Context, Marla Lopez Aug 2024

Preschool Executive Control And Adolescent Dietary Outcomes: Highlighting The Role Of Context, Marla Lopez

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Research has identified executive control (EC) as an important predictor of dietary outcomes among youth. Executive control in preschool age has been shown to predict important outcomes across development for youth, indicating that good, foundational EC abilities are associated with successful development in later life. Dietary outcomes across adolescence, an important transitional period for establishing healthy eating behaviors, are understudied. Therefore, the current study sought to link two critical developmental periods, examining how preschool EC is associated with dietary trajectories across adolescence. Further, the study aimed to identify how contextual factors, specifically indices of socio-economic status and the home and …

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Applications Of Artificial Intelligence On Drought Impact Monitoring And Assessment, Beichen Zhang Aug 2024

Applications Of Artificial Intelligence On Drought Impact Monitoring And Assessment, Beichen Zhang

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Drought, a prevalent and consequential natural disaster, poses widespread, indirect challenges across environmental and societal dimensions. Despite considerable focus on monitoring meteorological and hydrological drought and studying their characteristics, there is a gap in assessing its multifaceted impacts, especially on societal sectors. The dissertation comprises three research essays utilizing artificial intelligence to quantitatively study multi-dimensional drought impacts. The first essay leveraged deep learning and natural language processing to predict multi-dimensional drought impacts from textual datasets, including social media, news media, and citizen scientist reports. The findings demonstrate superior performance over traditional methods and unveil the spatial and temporal heterogeneity of …

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Investigating Associations Between Activity And Performance Traits Across Three Breeds Of Swine Using NuTrack, Dalton R. Obermier Aug 2024

Investigating Associations Between Activity And Performance Traits Across Three Breeds Of Swine Using NuTrack, Dalton R. Obermier

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Feed costs are the largest contributor towards the variable costs of pork production. To decrease feed cost while not sacrificing output requires an improvement in feed efficiency (FE). A potential approach to expand available phenotypes associated with FE is with activity tracking, yet the relationship between activity and performance is not well defined in swine. Therefore, the objective of this study was to quantify associations between activity and feed intake traits. Average daily feed intake (ADFI) was collected on 1,766 purebred boars of three genetic lines (Duroc, Landrace, and Yorkshire) using FIRE (Osborne Industries, Inc., Osborne, Kansas) at a testing …

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Optimizing Scalability For Formal Analysis With Evolutionary Algorithm, Jianghao Wang Aug 2024

Optimizing Scalability For Formal Analysis With Evolutionary Algorithm, Jianghao Wang

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Predominantly employed to tackle hardware validation challenges in the early years, formal methods have since expanded to software engineering, introducing a significant level of rigor and precision to software analysis. Its use of mathematical notations and logical reasoning allows for abstract modeling of programs, enabling researchers and engineers to perform a multitude of analysis tasks to verify system dependability and rigorously prove the correctness of system properties. Despite the availability of many automated analysis tools including those considered lightweight, the practical adoption of formal methods in software development has been limited due to scalability concerns, especially when applied to large …

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Optimization Of Mass Spectrometry-Based Methods For Low-Input And Spatial Proteomics, Andikan Jones Nwosu Aug 2024

Optimization Of Mass Spectrometry-Based Methods For Low-Input And Spatial Proteomics, Andikan Jones Nwosu

Theses and Dissertations

Eukaryotic cells are highly heterogeneous. These cells are arranged into different compartments, carrying out separate functions and facilitating biological processes. Proteins are the effector biomolecules targeted to subcellular locations that help fulfill specific tasks in living organisms. Spatial proteomics can help unravel molecularly how protein abundance and localization are altered in cells, which is not feasible in traditional bulk-scale proteomics. To achieve this, our lab has developed a miniaturized sample processing platform called nanoPOTS, reduced separation columns' inner diameter to increase ionization efficiency and concentrate analytes for mass spectrometers and optimized data acquisition modes for increasing proteome coverage in spatial …

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A Framework For The Foundation Of The Philosophy Of Artificial Intelligence, Emily Barnes, James Hutson Aug 2024

A Framework For The Foundation Of The Philosophy Of Artificial Intelligence, Emily Barnes, James Hutson

Faculty Scholarship

In recent years, the rapid advancement of artificial intelligence (AI) technology has sparked profound questions about the nature of machine intelligence and the possibility of AI consciousness. As AI systems become increasingly sophisticated, examining their philosophical foundations has become imperative. This article investigates the intricate relationship between AI and existential thought, aiming to establish a comprehensive framework for understanding AI's philosophical underpinnings. The historical development of AI, from symbolic AI to contemporary machine learning paradigms, highlights the increasing complexity and sophistication of AI systems, prompting significant philosophical debates about machine consciousness. Theoretical models such as the Independent Core Observer Model …

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Alfred Russel Wallace Notes 31. Wallace’S Personal Copy Of “Life Of Alexander Von Humboldt.”, Charles H. Smith Aug 2024

Alfred Russel Wallace Notes 31. Wallace’S Personal Copy Of “Life Of Alexander Von Humboldt.”, Charles H. Smith

Faculty/Staff Personal Papers

Alfred Russel Wallace owned a personal copy of the two-volume 1873 English edition of the Life of Alexander von Humboldt, now held by the library of the Linnean Society of London. Each volume is highly annotated, and the nature of these notes, and their several-directioned importance, is here discussed.

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Resolving The Size And Charge Of Small Particles: A Predictive Model Of Nanopore Mechanics, Samuel Bearden, Tigran M. Abramyan, Dmitry Gil, Jessica Johnson, Anton Murashko, Sergei Makaev, David Mai, Alexander Baranchikov, Vladimir Ivanov, Vladimir Reukov, Guigen Zhang Aug 2024

Resolving The Size And Charge Of Small Particles: A Predictive Model Of Nanopore Mechanics, Samuel Bearden, Tigran M. Abramyan, Dmitry Gil, Jessica Johnson, Anton Murashko, Sergei Makaev, David Mai, Alexander Baranchikov, Vladimir Ivanov, Vladimir Reukov, Guigen Zhang

Chemical and Materials Engineering Faculty Publications

The movement of small particles and molecules through nanopore membranes is widespread and has far-reaching implications. Consequently, the development of mathematical models is essential for understanding these processes on a micro level, leading to deeper insights. In this endeavor, we suggested a model based on a set of empirical equations to predict the transport of substances through a solid-state nanopore and the associated signals generated during their translocation. This model establishes analytical relationships between the ionic current and electrical double-layer potential observed during analyte translocation and their size, charge, and mobility in an electrolyte solution. This framework allows for rapid …

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Development Of 3d Human Cardiovascular And Cancer Tissue Model Within A Self-Driven Microfluidic Platform For Preclinical Drug Screening, Aibhlin Alexis Esparza Aug 2024

Development Of 3d Human Cardiovascular And Cancer Tissue Model Within A Self-Driven Microfluidic Platform For Preclinical Drug Screening, Aibhlin Alexis Esparza

Open Access Theses & Dissertations

According to the American Heart Association and World Health Organization, cardiovascular diseases (CVDs) are the leading cause of death worldwide. Monolayer cell culture (2D) and animal models are conventional methods to study CVDs, however, they limit researcherâ??s ability to simulate the human cardiovascular cellular microenvironments and accurate predication of pharmaceutical drug responses. Human induced pluripotent stem cell derived cardiomyocytes (hiPSC-CMs), biomaterials, and microfluidic technologies can be combined to create a controlled, reproducible 3D platform to study physiologically-relevant cellular responses to biochemical and physical changes in the microenvironment. My dissertation work demonstrates the development of novel self-driven microfluidic devices designed with …

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Interpretations Of Aesthetic Experience And Its Enactment In High School Visual Arts Education, Kenneth Albert Dore Aug 2024

Interpretations Of Aesthetic Experience And Its Enactment In High School Visual Arts Education, Kenneth Albert Dore

Open Access Theses & Dissertations

This dissertation sought to identify interpretations of Aesthetic Experience (AE) of high school visual arts teachers and purposes of its facilitation in their classrooms. Five high school visual arts teachers within a large school district in West Texas were interviewed. A qualitative Hybrid Phenomenological Method was utilized to analyze the data consisting of a descriptive and an interpretive approach. The descriptive approach highlighted common and unique characteristics of aesthetic experience as interpreted by the teachers. An interpretive approach was also employed utilizing Aesthetic Critical Pedagogy, Feminist Theory, and Aesthetic Theory frameworks along with my 20-years-experience as a visual arts teacher. …

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Of Cells And Tissues: Identifying The Elements Of A Diabetic Cardiac In Vitro Study Model, Ivana Hernandez Aug 2024

Of Cells And Tissues: Identifying The Elements Of A Diabetic Cardiac In Vitro Study Model, Ivana Hernandez

Open Access Theses & Dissertations

This study aimed to elucidate the impact of advanced glycation end products (AGEs) and glucose shock on cardiomyocyte viability, gene expression, cardiac biomarkers, and cardiac contractility. Firstly, AGEs were generated in-house, and their concentration was confirmed using absorbance measurements. AC16 cardiomyocytes were then exposed to varying doses of AGEs, resulting in dose-dependent decreases in cell viability. The maximum tolerated dose of AGEs was determined, revealing significant downregulation of the cardiac gene gap junction alpha 1 (GJA1). Furthermore, the study assessed the effects of AGEs, glucose shock, and their combination on biomarkers, cardiac myosin heavy chain (MHC), and connexin-43 (Cx-43) in …

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Flow-Shop Scheduling Optimization Through Discrete-Event Simulation And Neural Networks., Jesus Ricardo Herrera Garfio Aug 2024

Flow-Shop Scheduling Optimization Through Discrete-Event Simulation And Neural Networks., Jesus Ricardo Herrera Garfio

Open Access Theses & Dissertations

Industrial developments over the past few decades have transformed manufacturingprocesses, emphasizing the necessity for efficient scheduling systems. The shift from manual scheduling to automated and optimized systems has underscored the need for innovative approaches to improve production efficiency. Scheduling optimization of manufacturing systems is critical to improve operational efficiency. Typically, these scheduling problems become challenging because they involve coordinating various production tasks, resource management, and makespan minimization. These challenges are particularly evident in flow-shop manufacturing systems, where the operation sequencing significantly impacts overall performance. The main objective of this manuscript is to present the methodology followed to optimize the schedule …

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Decision-Making In Rats: Effects Of Drug Abuse, Safa Binte Hossain Aug 2024

Decision-Making In Rats: Effects Of Drug Abuse, Safa Binte Hossain

Open Access Theses & Dissertations

Decision-making is a critical cognitive function, often impaired by substance abuse. Understanding the underlying mechanisms in both human and animal models is essential for developing effective treatments. This thesis aims to study approach-avoid decision-making in rats and focuses on the impacts of oxycodone self-administration and alcohol abuse on approach-avoid decision-making.We hypothesize that oxycodone self-administration will alter decision-making in female rats, revealing sex differences and distinct psychometric functions, alcohol habituation will similarly affect decision-making in male rats. The study involved 23 Long Evans rats (11 males and 12 females) for decision-making behavioral study connecting multiple levels of rewards and costs combinations. …

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Signatures Of Selection, Gene Flow, And Genetic Drift On The Genomes Of A Recent Avian Radiation, Flor Brigitte Hernandez Camacho Aug 2024

Signatures Of Selection, Gene Flow, And Genetic Drift On The Genomes Of A Recent Avian Radiation, Flor Brigitte Hernandez Camacho

Open Access Theses & Dissertations

Speciation is not a discrete event but rather a gradual process that occurs along a continuum. Initially, populations remain genetically and reproductively connected, but they become reproductively isolated as the process of speciation progresses. Advances in DNA sequencing technology has helped our understanding of the processes that contribute to changes in the genetic composition of populations over the progression of speciation, also known as drivers of evolution (i.e. genetic drift, mutation, selection, and gene flow). Among them, hybridization, or the interbreeding between distinct lineages, is increasingly recognized as a natural process that can have significant consequences to the speciation process. …

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Staying Fresh: Unconventional Approaches Towards Advancing Energy Sustainability, Water Resources, And Community Resiliency In The Southwestern United States, Judith Hoyt Aug 2024

Staying Fresh: Unconventional Approaches Towards Advancing Energy Sustainability, Water Resources, And Community Resiliency In The Southwestern United States, Judith Hoyt

Open Access Theses & Dissertations

This dissertation addresses critical challenges in urban heat management, sustainable energy resource utilization, and water quality communication through three studies. Study 1 investigates the impact of roof color on urban heat islands in Tucson, Arizona where approximately 70% of roofs display high albedo (i.e., light) colors. Energy consumption simulations conducted indicate that converting dark- to light-colored roofs could save Tucson approximately $1,400,000 annually in energy costs, highlighting the potential of cool roofs for energy savings and improved thermal comfort. Study 2 assesses the sources of lithium in subsurface waters in West Texas and South Central New Mexico. Water chemistry data …

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Method Development For The Quantification Of Critically Valuable Elements In Permian Basin Produced Waters, Carley Oliver Aug 2024

Method Development For The Quantification Of Critically Valuable Elements In Permian Basin Produced Waters, Carley Oliver

Open Access Theses & Dissertations

Produced waters (PW) are a major byproduct of the oil and gas industrial hydraulic fracturing processes that create a major waste disposal issue with a need for disposal, treatment, and reuse method developments. The current primary disposal method is subsurface injection, which can lead to high pressures in the subsurface. PWs are often highly saline from mineral leaching due to long residence in subsurface reservoirs. According to the USGS National Minerals Information Center, bromine, calcium chloride, iodine, lithium, magnesium, and sodium chloride have been found in and extracted from these domestic subsurface brines, suggesting that there may be other economically …

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