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2022

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Spectroscopic Study Of Bi5ti3feo15 Aurivillius Compound For Multifunctional Applications, Mariana Castellanos Dec 2022

Spectroscopic Study Of Bi5ti3feo15 Aurivillius Compound For Multifunctional Applications, Mariana Castellanos

Open Access Theses & Dissertations

No abstract provided.

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What Makes Gpcrs From Different Families Bind To The Same Ligand?, Kwabena Owusu Dankwah Dec 2022

What Makes Gpcrs From Different Families Bind To The Same Ligand?, Kwabena Owusu Dankwah

Open Access Theses & Dissertations

G protein-coupled receptors (GPCRs) are the largest class of cell-surface receptor proteins with important functions in signal transduction and often serve as therapeutic drug targets. With the rapidly growing public data on three-dimensional (3D) structures of GPCRs and GPCR-ligand interactions, computational prediction of GPCR ligand binding becomes a practical option for high throughput screening and other experimental approaches during the beginning phases of ligand discovery. In this work, we set out to computationally uncover and understand the binding of a single ligand to GPCRs from several different families. We analyzed the sequences and 3D structures of GPCRs from various families …

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Oil Particle Analysis Using Machine Learning And Holography Imaging, Daniel Cruz Dec 2022

Oil Particle Analysis Using Machine Learning And Holography Imaging, Daniel Cruz

Open Access Theses & Dissertations

Holographic cameras show potential as a sensor to monitor oil spills. Holographic cameras record the light interference from particles in a volume of space, producing an image called a hologram. Processing these holograms is known as hologram reconstruction. It produces a representation of particles located in three-dimensional space. These cameras can record precise shapes and sizes of particles in a volume of water. However, it is very time-consuming and resource-intensive to process the images. Most algorithms that perform particle analysis require the hologram reconstruction step. The well-documented hybrid method is one such algorithm. Machine learning is one possible technique that …

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Direct Ink Write And Thermomechanical Characterization Of Thermoset Composites, Sergio Dante Favela Dec 2022

Direct Ink Write And Thermomechanical Characterization Of Thermoset Composites, Sergio Dante Favela

Open Access Theses & Dissertations

This research will be divided into two sections. The first section discusses direct ink writing and thermomechanical characterization for thermoset composites. The thermoset ink is prepared with fillers aiding the printing process by modifying the rheology of the ink and geometry retention by allowing for the part to have an initial UV cure step. Three specimen formulations with different weight percentages were printed by material extrusion in the shape of tensile specimens following ASTM standard D638 to characterize the mechanical properties at room temperature, 100â?? and 200â??. Furthermore, the ink resin was characterized through DSC, TGA, and rheology testing. The …

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Engineering 3d Bioprinted Cardiac Spheroidal Droplets With Cardiomyocytes And Cardiac Fibroblasts For Tissue Engineering And Drug Cytotoxicity Studies, Raven El Khoury Dec 2022

Engineering 3d Bioprinted Cardiac Spheroidal Droplets With Cardiomyocytes And Cardiac Fibroblasts For Tissue Engineering And Drug Cytotoxicity Studies, Raven El Khoury

Open Access Theses & Dissertations

Engineering is the supreme human endeavor that involves harnessing the scientific understanding of the natural world to design and invent objects to improve the society around us. Biomedical engineering is the implementation of concepts acquired from engineering in biology and medicine that aims to improve human health through the integration of engineering with biomedical sciences. The mission of a biomedical engineer is to develop technologies that help advance the quality of peopleâ??s health using various tools and materials with one passion and goal: making the patient's life longer and easier. Tissue engineering is developed from the field of biomaterials and …

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Infiltration-Controlled Combustion Of Lithium And Magnesium Powders And Reactions Of Lithium With Oxygen And Carbon Dioxide, Kevin Samuel Estala Rodriguez Dec 2022

Infiltration-Controlled Combustion Of Lithium And Magnesium Powders And Reactions Of Lithium With Oxygen And Carbon Dioxide, Kevin Samuel Estala Rodriguez

Open Access Theses & Dissertations

Chemical heat integrated power systems are of great interest for space missions where solar energy, nuclear energy, and batteries are not available or are not practical to use. A new concept of a power system is a metal combustor coupled with a chemical oxygen generator, where the generated oxygen infiltrates through the metal powder or combustion products. The combustion of lithium and magnesium powders under these conditions has not been studied yet. The present work investigates combustion of magnesium powder and stabilized lithium metal powder (SLMP) ignited by a laser inside a closed chamber filled with O2 or CO2. It …

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Natural Resources Management Framework For Agricultural Irrigation Systems Optimization, Juan Valentin Fernandez Dec 2022

Natural Resources Management Framework For Agricultural Irrigation Systems Optimization, Juan Valentin Fernandez

Open Access Theses & Dissertations

Water scarcity has increased substantially in the last decades in many parts of the world, and it is expected to worsen due to the significant increase in global water withdrawals, intensive population growth, and climate change. Water is easily one of the most essential and invaluable global resources due to its many uses, such as drinking, industrial processes, and irrigation. The agriculture sector is one of the most significant water users globally, accounting for nearly 70% of global freshwater withdrawals. Cities and industries compete with the agriculture sector for water sources, producing alarming levels of stress and pollution in the …

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Sulfonated Styrene Grafted Sebs/Abs Made By Additive Manufacturing For Ion Exchange Applications, Avianna Elaine Gallegos Dec 2022

Sulfonated Styrene Grafted Sebs/Abs Made By Additive Manufacturing For Ion Exchange Applications, Avianna Elaine Gallegos

Open Access Theses & Dissertations

An interpenetrating polymer network (IPN) for cation exchange applications was synthesized from a blend of styrene-ethylene/butylene-styrene (SEBS) and acrylonitrile butadiene styrene (ABS), which was 3D printed, grafted with crosslinked polystyrene (PS), and sulfonated. A method for styrene grafting was applied to reduce the damage to polymer phases caused by the sulfonation reaction. Styrene and divinylbenzene monomers were introduced to the IPN and induced with heat treatment to polymerize in situ. The graft copolymerization reaction was enhanced with varying quantities of benzoyl peroxide as a chemical initiator. The samples were subsequently sulfonated with chlorosulfonic acid in dichloroethane and functionalized for ion …

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Female Fighters: Why And How Do Women Rebel?, Alexandra Giggie Dec 2022

Female Fighters: Why And How Do Women Rebel?, Alexandra Giggie

Open Access Theses & Dissertations

No abstract provided.

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Effects Of Eccentric Cycling On Blood Flow Patterns And Vascular Reactivity, Manuel Gomez Dec 2022

Effects Of Eccentric Cycling On Blood Flow Patterns And Vascular Reactivity, Manuel Gomez

Open Access Theses & Dissertations

Decrease of blood flow to tissues, due to atherosclerotic plaque formation, produces mortality and morbidity outcomes. Vascular homeostasis depends in the direct interaction between blood flow and endothelial cells, known as endothelial sheer stress (ESS). In addition, turbulent flow, which can be measured by Reynolds number (Re), has been associated with decrease ESS. Eccentric exercise (ECC) has gained attention as a novel exercise modality that increases muscle performance without increasing metabolic demands; however, little is known about ESS during ECC. PURPOSE: To determine the effects of ECC cycling in blood flow patterns and vascular reactivity in young, healthy individuals. METHODS: …

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Black And Brown Carbon Optical Characterization In The El Paso - Ciudad Juarez Airshed, Pamela I. Lara Dec 2022

Black And Brown Carbon Optical Characterization In The El Paso - Ciudad Juarez Airshed, Pamela I. Lara

Open Access Theses & Dissertations

Black (EBC) and Brown (BrC) Carbon are ubiquitous constituents of atmospheric particulate matter that affect peopleâ??s health, disrupt ecosystems, and modulate local and global climate. Tracking the local deposition and sources of these aerosol particles is essential to better understanding their multidimensional environmental impact. The main goal of the current study is to measure the absorption coefficient (Babs) of particles within the Planetary Boundary Layer (PBL) of the El Paso (US)–Ciudad Juárez (Mexico) airshed and assess the contribution of black and brown carbon particles to the total optical absorption. Measurements were taken during winter (January, 2022), spring (May, 2022), and …

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Teaching About Teaching: A Philosophy Of Critical Literacy Through Phenomenological Ethics And Rhetorical Practices, Corina Lerma Dec 2022

Teaching About Teaching: A Philosophy Of Critical Literacy Through Phenomenological Ethics And Rhetorical Practices, Corina Lerma

Open Access Theses & Dissertations

This thesis presents a phenomenological approach to developing an alternative teaching curriculum for a first-year writing course anchored in rhetorical practices, but reflecting upon my experiences and understandings of phenomenological ethics and philosophy, which I believe can help envision the classroom differently and provides relevant theories to help develop more ethically aware rhetorical practices for first-year composition students. A phenomenological ethical approach that is grounded in experience, embraces ambiguity as an access point, and makes a call to responsibility and problematizes the ideas associated decontextualized and prescriptive teaching practices in higher education foregrounds the ethical implications and responsibilities we hold …

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Synthetic Data Generation For Intelligent Inspection Of Structural Environments, Noshin Habib Dec 2022

Synthetic Data Generation For Intelligent Inspection Of Structural Environments, Noshin Habib

Open Access Theses & Dissertations

Automated detection of cracks and corrosion in pavements and industrial settings is essential to a cost-effective approach to maintenance. Deep learning has paved the path for vast levels of improvement in the area. Such models require a plethora of data with accurate ground truth and enough variation for the model to generalize to the data, which is notwidely available. There has been recent progress in computer graphics being used for the creation of synthetic data to address the issue of deficient data availability, but it is limited to specific objects, such as cars and human beings. Textures and deformities within …

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High-Temperature Valve Design For A Solid Oxide Fuel Cell/Gas Turbine Hybrid System Utilizing Smart Materials, Alba Jazmin Leyva Dec 2022

High-Temperature Valve Design For A Solid Oxide Fuel Cell/Gas Turbine Hybrid System Utilizing Smart Materials, Alba Jazmin Leyva

Open Access Theses & Dissertations

The topic of this project includes extensive research on the Solid Oxide Fuel Cell Gas Turbine (SOFC/GT) hybrid system located at the National Energy Technology Laboratory. The goal is to reduce pollution and generate energy by using natural gas and a combination of fuel cells, heat exchangers, bypass valves, turbines, and combustors as components working together to produce clean energy. The SOFC/GT system works by having the fuel cell pressurized by the gas turbine. The turbine then produces exhaust gas for the fuel cell, because the turbine recovers the majority of the heat and the pressurization contributes to the enhancement …

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Exploring The Anticancer Mechanism Of Thienopyrazole Derivative Tpz-1 In Acute Myeloid Leukemia, Jessica Dyanne Hess Dec 2022

Exploring The Anticancer Mechanism Of Thienopyrazole Derivative Tpz-1 In Acute Myeloid Leukemia, Jessica Dyanne Hess

Open Access Theses & Dissertations

Anticancer drug discovery is a time and resource-consuming process for which exceedingly reliable and efficient modern approaches are needed. Phenotypic drug screenings can generate highly potent and innovative drug candidates; however, deconvolution of the drugâ??s target often presents significant barriers to drug development. To overcome this hurdle, we have originally combined in vitro and in silico analyses to uncover the molecular mechanism(s) driving the anticancer activity of the uniquely structured small molecule drug candidate, Tpz-1. Our study revealed that Tpz-1 is a multitargeted agent which induces the programmed death of HL-60 acute myeloid leukemia cells primarily through disruption of microtubule …

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Investigation Into The Economic Viability Of Industry 4.0 Practices In A Small Start-Up Setting: A Case Study, Joseph Lindley Dec 2022

Investigation Into The Economic Viability Of Industry 4.0 Practices In A Small Start-Up Setting: A Case Study, Joseph Lindley

Open Access Theses & Dissertations

Industry 4.0 has been a hot button topic since the first rumouringâ??s of a fourth industrial revolution taking place in the early 2010s. Since that time many companies have attempted to transform their process, procedures, and systems to become streamlined, efficient, and overall, more profitable. An example of this can be seen in companies such as Microsoft and IBM, Mitsubishi and Siemens who have gained a stronger foothold in their respective markets by their efficient implementation of Industry 4.0. Before we can address how small start-up companies can begin to compete with these behemoths, we must address the question; what …

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Autoantibody Against Tumor-Associated Antigens As Diagnostic Biomarkers In Hispanic Patients With Hepatocellular Carcinoma, Yangcheng Ma Dec 2022

Autoantibody Against Tumor-Associated Antigens As Diagnostic Biomarkers In Hispanic Patients With Hepatocellular Carcinoma, Yangcheng Ma

Open Access Theses & Dissertations

Liver cancer is one of the most prevalent malignancies, in which hepatocellular carcinoma (HCC) takes up more than 80% of liver cancer cases. Early diagnosis and treatment are practical approaches to impede HCC progression. Identifying and classifying autoantibodies against tumor-associated antigens (TAAs) have long been interested in cancer diagnosis, especially for HCC. Circulating anti-TAA autoantibodies amplify the antigen expression and are more stable in blood, guaranteeing anti-TAA autoantibodies as valid diagnostic biomarkers in clinical application. Nonetheless, very few studies had focused on the Hispanic HCC group, which might retain distinct etiological risk factors compared to other ethnicities. The high incidence …

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Modulation Of Non-Diffracting Hermite Gaussian Beams And Nonlinear Optical Microscopy For Nanoscale Sulfur Imaging, Gilberto Navarro Dec 2022

Modulation Of Non-Diffracting Hermite Gaussian Beams And Nonlinear Optical Microscopy For Nanoscale Sulfur Imaging, Gilberto Navarro

Open Access Theses & Dissertations

Hermite Gaussian beams are the solutions of the scalar paraxial wave equation in Cartesian coordinates. A method was developed to modulate the intensity profile of non-diffracting Hermite Gaussian (HG) beams. The original HG beamâ??s intensity profile consists of high intense corner lobes and low intense central lobes which is not ideal for structured illumination in light-field microscopy. The modulated HG beams were generated by multiplying the original HGâ??s beam envelope by a super-Gaussian envelope to modify the intensity profile to attain equal intensity lobes. The propagation of the original HG beam and modulated HG beam were compared to determine that …

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Predictive Utility Of The El Paso Pretrial Risk Assessment Instrument - Revised (Eppra-R), Chelsea Sierra Queen Dec 2022

Predictive Utility Of The El Paso Pretrial Risk Assessment Instrument - Revised (Eppra-R), Chelsea Sierra Queen

Open Access Theses & Dissertations

Pretrial risk assessments are used to divert defendants from pretrial detention by estimating risk of pretrial specific outcomes (i.e., failure to appear, rearrest). Ongoing validation of this tool is recommended to assess accuracy and ensure that there is no bias against specific subgroups (e.g., gender, race/ethnicity, or age) of defendants. The present study evaluates the utility of a locally developed instrument in El Paso County - a predominantly Latinx county. Area Under the Curve (AUC) Receiving Operator Condition (ROC) analyses indicate statistically â??fairâ?? predictive utility for the tool. Binary logistic regression models suggest no evidence of bias. This study will …

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Fabrication, Microstructure And Mechanical Characterization Of Crvnbtaw High Entropy Alloy Coatings Using Magnetron Sputtering, Jorge Quezada Dec 2022

Fabrication, Microstructure And Mechanical Characterization Of Crvnbtaw High Entropy Alloy Coatings Using Magnetron Sputtering, Jorge Quezada

Open Access Theses & Dissertations

In this project a CrVNbTaW high entropy alloy was evaluated. The samples were made using radio frequency magnetron sputtering and were made under similar conditions. The deposition parameters were explored to find the ideal deposition process. The process included a pressure from 0.1-2mTorr, 600C, 1 hour duration, at 100W power to guns, and constant argon flow. The samples were fabricated under similar parameters using silicon steel and sapphire substrates. The samples were analyzed and characterized using X-ray diffraction, scanning electron microscopy, atomic force microscopy, nanoindentation and corrosion testing. Based on these results we were able to get a better understanding …

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Metrological Challenges Of Practical Computer-Enhanced Measurements, Hector Alejandro Reyes Dec 2022

Metrological Challenges Of Practical Computer-Enhanced Measurements, Hector Alejandro Reyes

Open Access Theses & Dissertations

As technology progresses, sensors and computers become cheaper, so we can afford to perform more measurements and process the data faster. However, this also brings challenges.The goal of this thesis is to enumerate these challenges and to provide possible solutions. The first challenge is related to the fact that the existing metrological recommendations are mostly based on the previous practice, when we could only afford to have a small number of measurements. In this regard, our objective is to describe the related problem and to propose a solution to this problem. These description (on the example of the design of …

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Fabrication And Characterization Of Iron-Based Catalysts For The Dehydrogenation Of Fossil Fuels, Victoria Isabel Reyes Dec 2022

Fabrication And Characterization Of Iron-Based Catalysts For The Dehydrogenation Of Fossil Fuels, Victoria Isabel Reyes

Open Access Theses & Dissertations

For a prosperous and sustainable future, hydrogen is an encouraging solution due to its simple transition for industrial decarbonization and synergy for economic development. Paradoxically, current hydrogen production pathways release substantial amount of greenhouse gases into the atmosphere contributing to climate change. To keep up with increasing demand, hydrogen could be produced through microwave-assisted thermocatalytic dehydrogenation of fossil fuels without emitting carbon dioxide. This requires specified catalysts to meet the requirements of hydrogen yield and selectivity. The objective of the present research is to fabricate, characterize, and compare iron-based alumina (FeAl_x O_y) catalysts produced via solution combustion synthesis and iron-based …

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Classification Of Nuclear Pastas Through Alpha Shapes Model, Daniela Ramirez Chavez Dec 2022

Classification Of Nuclear Pastas Through Alpha Shapes Model, Daniela Ramirez Chavez

Open Access Theses & Dissertations

The nuclear pasta is important because is an astromaterial with incredible strength that may be a source for gravitational waves, which observe from the rotation of neutron stars. The characterization of the pasta is vital because the nuclear phases have transport properties - compressibility, neutrino opacity, thermal conductivity, and electrical conductivity - associated with their shape for which neutron stars may be sensitive. These properties could interpret observations of supernova neutrinos, magnetic field decay, and crust cooling of accreting neutron stars. Here, we study the nuclear pasta using alpha shapes to achieve a phase characterization with the Minkowski functionals (area, …

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Analyzing The Supply Chain Operation Of A Fast-Food Restaurant Using Simulation Modeling And Developing A Cost Estimation Optimization Model In The Disruption Period, Amit Kumar Saha Dec 2022

Analyzing The Supply Chain Operation Of A Fast-Food Restaurant Using Simulation Modeling And Developing A Cost Estimation Optimization Model In The Disruption Period, Amit Kumar Saha

Open Access Theses & Dissertations

Supply chain operation performance is a much-discussed topic over the last decade which will lead to optimizing the resources required to provide the necessary level of customer service to a specific segment and improve customer service through increased product availability and reduced order cycle time. During disruption in supply chain, performance parameter changes, and the overall supply chain cost at each stage increases. External factors such as labor shortages, delayed and costly supplies, and decreased demand also contribute to this cost. This thesis work presents a research-focused analysis of a small pizza shop, under circumstances that include the loss of …

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Magnetic Structures Of Sawtooth Olivines Mn2six 4 (X = S, Se) Determined Through Neutron Powder Diffraction, Melaku Sisay Tafere Dec 2022

Magnetic Structures Of Sawtooth Olivines Mn2six 4 (X = S, Se) Determined Through Neutron Powder Diffraction, Melaku Sisay Tafere

Open Access Theses & Dissertations

In olivine chalcogenide Mn2SiX 4 (X = S, Se) compounds, the Mn lattice produces a sawtooth, which is of critical significance in magnetism due to the potential for manifesting at bands in the magnon spectrum, a crucial component in magnonics. The compounds Mn2SiS4 and Mn2SiSe4 in Mn2SiX 4 family undergo antiferromagnetic phase transitions at T â?? 85 K and â?? 66 K, respectively, as determined from the specific heat, Cp(T). The average and local crystal structuresare determined using synchrotron X-ray, neutron diffraction, and X-ray total scattering data followed by Rietveld and pair distribution function (PDF) analysis. It is found from …

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Authoritarian Regimes And Public Goods Structure And Survival, Benjamin Torres Dec 2022

Authoritarian Regimes And Public Goods Structure And Survival, Benjamin Torres

Open Access Theses & Dissertations

What explains the variance in the level of public goods provision in authoritarian regimes? Naturally, there are differences in the capabilities of states, however, there is a noticeable trend in the level of output from certain authoritarian states. Democracies have a clear causal mechanism for public goods provision, which is the electoral mandate, but dictatorships lack this feature. Hence the question is posed, why do some authoritarian states put so much effort into the provision of public goods? Singapore is considered one of the most developed states in the world, (outperforming some of the most democratic states.) yet it is …

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Exploration And Analysis Of Attitudes And Determinants Toward Undetectable Equals Untransmittable (U=U) Among Minority Women, Roberta Marie Thimbriel Dec 2022

Exploration And Analysis Of Attitudes And Determinants Toward Undetectable Equals Untransmittable (U=U) Among Minority Women, Roberta Marie Thimbriel

Open Access Theses & Dissertations

Purpose: To explore and assess awareness of and attitudes toward "undetectable equals untransmittable" (U=U) and associations with social-ecological factors among minority women. Population: Ethnic minority women 18 years and older residing in the El Paso, TX, US - Juarez, Mexico border region. Methods: A cross-sectional convergent parallel mixed methods study using in-depth interviews and a survey instrument was conducted among a purposive sample. Thematic analysis was done on qualitative data, and descriptive, bivariate and binary logistic regression analyses were done on quantitative data. Results: The majority of the participants (66.7% interviewees and 50.7% survey) were Hispanic, in their early-mid thirties, …

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Using Ground Penetrating Radar To Investigate Controls On Pedogenic Calcium Carbonate Distribution In Dryland Critical Zones, Nohemi Valenzuela Garay Dec 2022

Using Ground Penetrating Radar To Investigate Controls On Pedogenic Calcium Carbonate Distribution In Dryland Critical Zones, Nohemi Valenzuela Garay

Open Access Theses & Dissertations

Caliche or pedogenic calcium carbonate (CaCO3) layers are a common feature of arid soils, but the environmental controls on their distribution are not fully understood. Caliche layers are thought to play an important role in shallow subsurface water storage and movement, due to their water retention capacity and ability to impede vertical water transport (Hennessy et al., 1983). Therefore, caliche distribution and stability play a role in controlling water distribution in arid lands. However, due to its largely subsurface nature, caliche can be difficult to investigate and map without significant effort. I hypothesize that noninvasive geophysical methods, such as ground-penetrating …

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Mental Illness Labeling In Justice-Involved People, Elena Therese Vaudreuil Dec 2022

Mental Illness Labeling In Justice-Involved People, Elena Therese Vaudreuil

Open Access Theses & Dissertations

While it cannot be denied that there is a strong correlational relationship between justice-involvement and mental illness, research has demonstrated that severe mental illness is rarely the direct cause of criminal activity. However, stigmatizing attitudes towards people with mental illness are often rooted in incorrect generalizations regarding the link between mental illness and unpredictable, dangerous behavior, which can be magnified by labels (e.g., "schizophrenic" or "criminal"). This reduction of a person to a label results in a number of negative outcomes, ranging from the prejudice and inequitable treatment one may experience from groups such as justice workers, police, and employers …

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Biology And Ecology Of Aedes (Stegomyia) Aegypti In The Northern Chihuahuan Desert, Adam Joseph Vera Dec 2022

Biology And Ecology Of Aedes (Stegomyia) Aegypti In The Northern Chihuahuan Desert, Adam Joseph Vera

Open Access Theses & Dissertations

Aedes aegypti is a medically important mosquito species that transmits multiple arboviruses, including dengue, chikungunya, Zika, and yellow fever. This mosquito species has expanded its geographical range into expanded into the Northern Chihuahuan Desert to further increase the risk of infection by these viruses in naïve human populations. Although Ae. aegypti is abundant along the U.S.â??Mexico border, the biology and ecology of this mosquito species in this temperate/arid climate region is not understood. The objective of this study was to understand the environmental factors that influence the invasive species of Ae. aegypti abundance, breeding habitat selection, host feeding behavior, and …

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