Digital Commons Network^™

Assessing Canopy Features, Its Shading Factor, And Their Influence In The Estimation Of Evapotranspiration In Almond Orchards Using Uas Information And The Two-Source Energy Balance Model, Moises R. Duran-Gomez

All Graduate Theses and Dissertations, Fall 2023 to Present

This study explored how canopy biomass and shadows affect evapotranspiration (ET) estimates, a crucial factor for irrigation management in almond orchards in California’s Central Valley. Data from 24 drone flights over three almond plots in 2021 and 2022 were analyzed using the Two-Source Energy Balance (TSEB) model, combined with meteorological data from EC-towers. The study found that filtering out shadows improved ET estimation, particularly in young orchards, and identified the importance of using new Leaf Area Index (LAI) models for better accuracy. This research is part of the T-REX initiative, which integrates drone and ground-based data to enhance water use …

Insights From Diverse Environments: Investigating The Fate And Transport Of Semivolatile Organic Contaminants In Alpine, Arctic, And Arid Regions, Jeffrey Perala-Dewey

All Graduate Theses and Dissertations, Fall 2023 to Present

This dissertation investigates the fate and transport of pollutants through four field-based studies in a diverse array of environments. These pollutants travel through the atmosphere and end up in places far from their original sources. In this work I explore how chemical properties of the pollutants and the environmental processes that are present change the way the pollutants travel through the environment. In the first study, pollutants from car engines were quantified in the vegetation along transects in three alpine valleys. Using these measurements, I investigated how the chemical properties of the pollutants impacted their interplay with wind systems in …

Mathematical And Statistical Methods To Harness Limited Data In Models For Ecological Space Use Under Global Change, Sarah C. Bogen

All Graduate Theses and Dissertations, Fall 2023 to Present

The dynamics of how plants and animals use space in their habitats has important implications for the fields of ecology and conservation. However, understanding and responding to these spatial and temporal dynamics is often limited by data availability, financial resources and biases. As average global temperatures increase, suitable habitats shift poleward and require local populations to move with suitable habitat, adapt to the changing environment, or risk extinction. Capacity to persist without movement may be estimated by considering changes to a combination of habitat characteristics. Capacity to track suitable habitat may be modeled through synthesizing information on species demographic mechanisms …

The Geoarchaeology Of An Early Agricultural Landscape On Clear Creek, Fremont Indian State Park, Utah, Michael D. Bianchini

All Graduate Theses and Dissertations, Fall 2023 to Present

Clear Creek is a major Fremont early agricultural landscape in central Utah. The Fremont culture occupied the northern Colorado Plateau and the eastern Great Basin for approximately 1,000 years between AD 300–1300. This study builds an alluvial chronology that details the local history of alluvial fan development and erosion and examines the geoarchaeological context at Five Finger Ridge, the major occupation site in the valley. Geochronologic dating of sediment deposits, analyses of sediment types, AMS radiocarbon dating, and optically stimulated luminescence dating (OSL) ages has helped identify geomorphic contexts of Fremont agriculture in Clear Creek Canyon. This study focuses on …

Using Luminescence Dating To Investigate Geomorphic And Archaeologic Features At The Wiggins Fork Bison Jump Complex, Northwestern Wyoming, Emma T. Krolczyk

All Graduate Theses and Dissertations, Fall 2023 to Present

The Wiggins Fork Bison Jump Complex, located in northwestern Wyoming, is comprised of thousands of human-placed rock piles, known as cairns, that were placed within lines to form an extensive network of drivelines and funnels leading to cliffs or steep slopes. These archaeological features were used by Native Americans as a bison hunting method, where the animals were driven off cliffs for harvest. This research uses luminescence dating, which determines when sediment was last exposed to sunlight, to date the timing of driveline construction and the deposition ages of the underlying river deposits.

Research focused on Jump #4, which had …

Viking And Native North American Interactions: The Spread Of Disease In The Norse Discovery Of North America, Sarah N. Haughawout

Undergraduate Honors Capstone Projects

This paper evaluates the potential for spread of disease in the Norse and Native North American interactions around 1000 CE. At this time, the Vikings were expanding their territory in search of land and natural resources following the Viking Raids in mainland Europe. They traveled to Iceland, then Greenland, and finally the eastern coast of northern Canada. Norse explorers faced numerous obstacles on their journeys, but they still prospered in North America for a time. The Vikings hunted the land and sea mammals, used the land, and found ways to thrive while having hostile relations and contact with the Native …

Dynamic Key-Based Privacy-Preserving Authentication Scheme For Internet Of Drones, Zain Chaudhary

Honors Theses

The Internet of Drones (IoD) proliferation has catalyzed transformative changes across various industries, from agriculture to urban management. However, expanding drone networks also presents significant security challenges concerning secure communication and authentication. This paper introduces a robust privacy-preserving key-based authentication scheme tailored explicitly for the IoD, utilizing a matrix key generated by Hierarchical Message Authentication Codes (HMAC) and the SHA-256 algorithm to address these vulnerabilities. Our system enhances security by ensuring each drone in the network can authenticate securely and reliably with a central unit, preventing unauthorized access and securing communications against common threats like eavesdropping and impersonation attacks. Our …

Mechanical Stability Of Body-Centered Cubic Iron At Earth's Core Pressure And Temperature Conditions Using A Molecular Graph Kernel Regression And Gaussian Process., Blaise Awola Ayirizia

Open Access Theses & Dissertations

We used machine learning to study nonmagnetic BCC iron in conditions similar to thosefound in the Earthâ??s core. Our model predicts the stability of BCC iron at high temperatures and pressures by analyzing a dataset from ab initio molecular dynamics simulations. The framework uses Gaussian process regression to make predictions by comparing the similarity between molecules. This comparison is made using the marginalized graph kernel. To use the marginalized graph kernel, the framework applies a spatial adjacency rule to convert molecules into graphs, where the vertices and edges are labeled by elements and interatomic distances, respectively. We can use this …

Implementing The Methodology To Generate Diagnostic And Therapeutic Antibodies, Andrea Mariana Carlin

Open Access Theses & Dissertations

This research aimed to establish the methodology for developing monoclonal antibodies at The University of Texas at El Paso. Monoclonal antibodies are indispensable across multiple fields, including diagnostics, therapeutics, and biotechnology, yet there is a shortage of commercially available antibodies targeting specific proteins or possessing specialized characteristics. To address this gap, three models were selected: a peptide derived from the intracellular protein Schlafen 8 and two cell surface protein receptors: mouse vascular endothelial growth factor receptor 2 (VEGFR2) and human melanocortin receptor 4 (MC4R). These proteins present unique challenges in antibody generation, including issues of accessibility, expression, and specificity.

Throughout …

Examining Key Predictors Of Enrollment At A Regional, Open-Access Research University On The U.S. - Mexico Border, Marcus Gay

Open Access Theses & Dissertations

Each year, approximately 64% of admitted students do not enroll at the University of Texas at El Paso (UTEP). This is particularly concerning given the projected decline in regional high school graduates beginning in the 2025-2026 academic year. The El Paso region is also predominantly composed of groups who have been historically underrepresented in higher education, including Hispanic or Latino students, individuals from low socio-economic backgrounds, and first-generation college students. Using logistic regression analysis, this quantitative study investigates how seven key factors impact the likelihood of enrollment among admitted UTEP applicants. The study utilized admissions data provided by UTEP’s Texas …

Uncovering The Light Network Load Performance Penalty Of The Network Link Outlier Factor (Nlof), Michelle Lara

Open Access Theses & Dissertations

This thesis evaluates the effectiveness of the Network Link Outlier Factor with Most Likely Link (NLOF: MLL) algorithm under varying network load conditions. Repeated simulation experiments using Mininet were conducted for four different network-wide load levels: 100 Mbps, 500 Mbps, 1 Gbps, and 5 Gbps. Using statistical inference, our experimental results indicate that NLOF: MLL is ineffective under light load conditions (i.e., 100Mbps load) due to the limited network flow data available for its learning process. This limitation highlights a key challenge in applying the algorithm to lightly loaded networks. A preliminary algorithm was proposed to address this light-load performance …

Integrating Responsible And Ethical Conduct Of Research Into Cures: A Longitudinal Study Observing Professional Development Of Fellows Within The Ethics Network For Course-Based Opportunities In Undergraduate Research, Aimee Angelica Hernandez-Gaytan

Open Access Theses & Dissertations

No abstract provided.

Protective And Risk Exposures Of Cancers Disproportionately Affecting Hispanics In A U.S. - Mexico Border Population: A Clinical Informatics Approach, Amir Hernandez

Open Access Theses & Dissertations

BACKGROUND: Cancer is the second leading cause of death in the U.S. with over 8 million new cases between 2016 and 2020. A variety of protective and risk exposures are associated with multiple cancers and disparities and inequalities exist in the health outcomes of minority populations. Hispanic populations in the U.S. and Texas have some of the highest rates of cancer incidence and mortality when compared to other populations. The use of Population and Public Health Informatics approaches to address these issues have shown promise when employed in healthcare institutions METHODS: A case-control study design examined associations between multiple cancers …

Pretrial Release Decision-Making: Understanding The Factors Contributing To Pretrial Release Bond Information, Chelsea Sierra Queen

Open Access Theses & Dissertations

At initial appearance, judges and magistrates must strike a balance between a defendantâ??s likelihood of returning to court and the safety of the community when determining pretrial release bonds, using limited available information in short periods of time. Across two complementary studies, factorsâ??both established by literature and novelâ??are assessed to further understand judicial decision-making in pretrial settings. Study 1 was a secondary data analysis to determine whether established factors considered at release are replicated in El Paso, Texas. Study 2 used observational data to review characteristics specific to defendants and the initial hearing interaction, while similarly analyzing established factors considered …

Intrinsic, Doped And Alloyed Gallium Oxide Films For Optoelectronics, Francelia Sanchez Escobar

Open Access Theses & Dissertations

Due to the impressive advancement of present technology and increasing energy consumption, there is increasing demand for energy-efficient multifunctional devices based on low-cost, eco-friendly material systems. Gallium oxide (Ga2O3) is an emerging semiconductor with potential for the next generation of power electronics and optoelectronic devices due to its ultra-wide bandgap of 4.8 eV and high theoretical breakdown voltage of 8 MV/cm among other intrinsic properties. Some of the possible applications of β-Ga2O3 include ultra-violet (UV) solar blind photodetectors, field effect transistors, solar cells, and chemical sensors. However, to utilize its full potential, understanding the mechanistic aspects of thin film growth …

Examining The Relationship Between Adverse Childhood Experiences, Coping Behaviors, And Metabolic Syndrome In Mexican-American Men, Paulina Torres

Open Access Theses & Dissertations

Background: The prevalence of metabolic syndrome (MetS) has been increasing in the US over recent years. Individuals who have experienced adverse childhood experiences (ACEs) and developed maladaptive coping strategies are at increased risk of developing MetS. Hispanic men might have an increased risk of developing MetS due to higher exposure to ACEs and increased use of maladaptive coping strategies.Purpose: To examine the relationship between ACEs, coping, and MetS among Mexican-American men. Methods: A secondary analysis of cross-sectional study of 100 adult men from El Paso, Texas in 2018-19. ACEs were examined using the 10-item ACE questionnaire. Coping was assessed through …

Optimal Route Planning Considering Microlevel Sequence Of Delivery Task Using Computer Simulation, Dana Alejandra Zamorano Orozco

Open Access Theses & Dissertations

As globalization reshapes our industries worldwide, supply chain management has evolved into a highly interconnected world that oversees traditional management, making countries more interdependent. Driven by rapid technological advancements, this shift allows companies to share information in a matter of seconds across continents, aligning operations and building adaptability to quick changes. Therefore, industries have greatly needed to adjust to and use the new technology to their advantage. However, even when this impact can be observed globally, the general impact can be analyzed and eradicated by performing micro-level analysis within the supply chain using technologies to their advantage. AnyLogic is a …

The Flexible Pathways Model Of Writing Assessment: A Plan For Equity And Agency In The Writing Classroom, Matthew Varel

Open Access Theses & Dissertations

This project is a qualitative study in which I seek to understand how my new model of writing assessment, The Flexible Pathways Model, or FPM, functions when piloted in three First-Year Writing classrooms at a border and Hispanic-Serving Institution. This research builds on the work of composition scholars Peter Elbow and Pat Belanoff, Elbow and Jane Danielewicz, Asao B. Inoue, Ellen Carillo, and Edward White as well as education scholar Benjamin Bloom. The model also incorporates concepts from Universal Design scholarship of Tara Wood, Stephen Dolmage, and Anne-Marie Womack. In the FPM, students learn about four different methods of writing …

What You Must Know: Retention And Destruction Of Dental Records And Your Most-Asked Questions About Dental Records, Daniel Schulte Jd

The Journal of the Michigan Dental Association

An overview of the basic information about dental records, including retention and destruction, that you and your staff should be aware of, provided by MDA Legal Counsel Dan Schulte, J.D. Plus, for your reference, answers to the questions Michigan dental offices are asking about dental record retention, access, release, and destruction.

Dental records are vital for patient care, legal compliance, and professional practice management. Michigan law mandates retaining dental records for a minimum of 10 years, ensuring their confidentiality, accessibility, and integrity. Destruction of records less than 10 years old requires patient notification and authorization, while those over 10 years …

Preparing Educators To Effectively Engage With Postsecondary Stem Students With Autism, Luzconsuelo Gavaldon

Open Access Theses & Dissertations

Autism spectrum disorder (ASD) is a lifetime mental disability (Boucher, 2009). Because the brains of people with autism work differently than their non-neurodiverse peers (Kuzminskaite et al., 2020), they tend to respond to external stimuli in a hypo- or hyper-sensory fashion. One of the primary considerations that must be accounted for when working with individuals with autism is that the brains of these persons are each neurologically distinct. In other words, there is no "one-size-fits-all" means by which individuals with ASD learn and develop and, consequently, no single way to therefore engage with said individuals (Anderson & Butt, 2017; Kuzminski …

Enhancing The Utility Of Unmanned Autonomous Vehicles (Uavs) With Model-Based Systems Engineering (Mbse) And Modular Open Systems Approach (Mosa), Aimee Barraza

Open Access Theses & Dissertations

Unmanned Autonomous Vehicles (UAVs) have emerged as versatile tools with significant implications across various industries, particularly in defense. The technological advancements in UAVs have revolutionized military operations, surveillance, and reconnaissance capabilities. However, there exist challenges such as environmental factors affecting sensor and flight performance, limited battery life restricting flight durations, and payload capacity constraints impeding task efficiency.This paper delves into the importance of UAVs in different industries, specifically focusing on their pivotal role in the Department of Defense. It emphasizes the necessity of technological upgrades to overcome current challenges and proposes the adoption of a Modular and Open System Approach …

Unequal Struggles: The Heightened Burdens Of First-Generation College Students During The Covid-19 Pandemic, Kristen Nichole Branch

Open Access Theses & Dissertations

This narrative literature review explores the current research and data on the COVID-19 pandemic and its effects on first-generation college students. From academics to mental, emotional, and social effects, the COVID-19 pandemic took the hurdles that this unique group of students already faces and amplified their challenges. This narrative literature review looks at different studies starting at the peak of the pandemic, 2020, to the current year, 2024, where we are beginning to see mitigation strategies and changes to policies to assist the flaws within the education system for first-generation students.

Redefining Approaches For Measuring Landscape Subsidence And Permafrost Degradation In Arctic Tundra Environments, Tabatha Lynn Fuson

Open Access Theses & Dissertations

As climate change accelerates in the Arctic, the degradation of permafrost is leading to significant landscape transformation in tundra landscapes. This dissertation investigates the multifaceted responses of permafrost systems to warming, focusing on the dynamics of surface elevation changes and active layer thickness (ALT) across the North Slope of Alaska. In this study, I explore the capacity of repeat Terrestrial Laser Scanning (TLS) technology for modeling tundra features and detecting surface subsidence, specifically how different climate and landscape conditions during scanning impact TLS model precision. We also compare TLS model precision estimates to TLS model accuracy by comparing elevation values …

Examination Of The Role Of Ovarian Hormones On Nicotine Withdrawal Severity In Females, Priscilla Giner

Open Access Theses & Dissertations

Women are more susceptible to the long-term consequences of chronic nicotine exposure, and clinical evidence has shown that abstinence from nicotine exposure produces a withdrawal syndrome that is intensified by estrogen (E2 in rats) and progesterone (PR) in females. The goal of this Masterâ??s thesis was to determine the mechanisms by which E2 and PR promote withdrawal from nicotine vapor inhalation in female rats. Prior work in male rodents has revealed that nicotine withdrawal is modulated in the medial habenula-interpeduncular nucleus (MHb-IPN) pathway. Our hypothesis is that females experience greater inhibition of the IPN via local interneurons that release the …

General Purpose Gpu Benchmarks For Neural Networks, Jose Maria Granados

Open Access Theses & Dissertations

Neural networks are a field of computing experiencing a rise in popularity in recent years due to the utilization of graphics processing units as their computational centerpiece. The lack of neural network benchmarks for the open-source Nyuzi architecture, a developing general-purpose processor with graphical processing capabilities, is the focus of this thesis. This work aims to determine whether Nyuziâ??s performance counters and traceable events suffice for performance tuning of neural network implementations. Given the mathematical intensity of neural networks, a strong emphasis is placed on events related to arithmetic instructions. Experimenting with neural network implementations in C and C++, existent …

A New Normal: Testing Cumulative Prospect Theory In Defendant Plea Decision-Making, Grace Hanzelin

Open Access Theses & Dissertations

Plea-bargaining is a common and necessary part of the American criminal justice system and though psycholegal scholars have made great advancements in our understanding of defendant plea behavior, the field generalcy lacks a sufficient theoretical model of plea-bargain decision-making. Across two experiments, this dissertation empirically tests Cumulative Prospect Theory (CPT; Tversky & Kahneman, 1992) as a potential model of defendant plea decisions. In Experiment 1, participants completed two risk aversion tasks, one economic and one adapted into a plea domain, to assess the presence of loss aversion and risk aversion in both domains. Findings suggest that, in a plea context, …

Dynamic Optimization Of Directed Energy Deposition Build Conditions Using Real-Time Monitoring Via Closed-Loop Control, Callan Herberger

Open Access Theses & Dissertations

Directed Energy Deposition (DED) is an additive manufacturing process that is being rapidly adopted by industry and is well suited for the fabrication of complex components in various metal alloys. DED provides unique benefits such as design flexibility, the potential for in-situ alloying, and an open environment that allows for unobstructed monitoring within the build chamber. Despite these benefits, fully exploiting additive manufacturing's (AM) potential remains a complex task for designers. This dissertation presents a framework for controlling Directed Energy Deposition process variables through in-situ monitoring. An exploration into modifying AM build conditions through the development and implementation of a …

Critical Analysis Of Archival Data: The Alvarado V. Episd Case, Mauro Alfredo Hinojosa

Open Access Theses & Dissertations

This research analyses the Alvarado vs. El Paso Independent School District legal files, housed at the Sonnichsen Special Collections Department, The University of Texas at El Paso Library. This dissertation explored the following questions: Research question 1 (RQ1): What are the political and social-cultural contexts of the Alvarado case based on the Archives?; and Research Question 2 (RQ2): impact on school education, to include themes in policy and leadership. A qualitative research approach framed through Latino Critical Race Theory exposes how the U.S. education system has historically reinforced White perspectives and marginalized Latino groups, specifically focusing on Mexican-American students in …

Chipless 3d Microfluidic Rf Sensing, Sheikh Dobir Hossain

Open Access Theses & Dissertations

Effective management of the cold chain is essential to uphold the quality and safety of products vulnerability to physical factors like temperature, humidity, pressure, etc., including perishable foods, pharmaceuticals, and vaccines. Chipless Radio Frequency Identification (RFID) sensors have become increasingly favored as a viable technology for tracking, inventory, and sensing industries due to their wireless and non-line of sight (NLOS) situations, straightforward fabrication, cost efficiency, and adaptability to challenging environmental conditions. However, there is still a need for advancements in RFID sensors to make them promise for cold chain applications. Integration of flexibility and non-volatile memory into the existing RFID …

A Qualitative Study Of School Resource Officers In A Borderland School, Myrna Lozano

Open Access Theses & Dissertations

In recent years, there has been growing concern over the role of school resource officers (SROs) in enforcing discipline in K-12 public schools. This qualitative study aims to explore the experiences of SROs involved with discipline issues at schools. By conducting interviews with SROs and examining official school documents, this study will shed light on how these officers navigate the complexities of the job while balancing the need for security with the goal of promoting positive outcomes for students. It is crucial to explore the perspectives and experiences of SROs to better understand their involvement with the K-12 public school …