Digital Commons Network^™

Development Of The Thermal Wire Embedding Technology For Electronic And Mechanical Applications On Fdm-Printed Parts, Daniel Abraham Marquez

Open Access Theses & Dissertations

Additive Manufacturing (AM) has increased in popularity and attracted much attention from many fields such as automotive, aviation, aerospace, and even the fashion industry. Since the early 2000s, Fused Deposition Modeling (FDM) technologies have been the most popular in the AM world ("Wohlers Talk" Popularity of FDM). These technologies have been mainly used for building parts for prototype and structural type of applications such as a fixture for components or a housing for mechanisms.

With the current state of the FDM technologies, the functionality of the parts that are printed are limited to the applications listed before or simply just …

Estimates Of Eddy Heat Flux Crossing The Antarctic Circumpolar Current From Observations In Drake Passage, D. Randolph Watts, Karen L. Tracey, Kathleen A. Donohue, Teresa K. Chereskin

Graduate School of Oceanography Faculty Publications

The 4-yr measurements by current- and pressure-recording inverted echo sounders in Drake Passage produced statistically stable eddy heat flux estimates. Horizontal currents in the Antarctic Circumpolar Current (ACC) turn with depth when a depth-independent geostrophic current crosses the upper baroclinic zone. The dynamically important divergent component of eddy heat flux is calculated. Whereas full eddy heat fluxes differ greatly in magnitude and direction at neighboring locations within the local dynamics array (LDA), the divergent eddy heat fluxes are poleward almost everywhere. Case studies illustrate baroclinic instability events that cause meanders to grow rapidly. In the southern passage, where eddy variability …

Defining And Characterizing The Step In The Hiv-1 Viral Life Cycle Affected By Fullerene Derivatives, Zachary Sean Martinez

Open Access Theses & Dissertations

Fullerene derivatives, both C60 and C70, were synthesized and characterized to test their activity against HIV-1 infection. The derivatives tested have previously been reported to inhibit HIV-1 replication and/or in vitro activity of reverse transcriptase. It was found that viruses produced in the presence of low micromolar concentrations of most of these fullerene derivatives exhibit a reduction in viral infectivity greater than 99%. Quantification of virion-associated viral RNA and p24 indicates that RNA packaging and viral production were unremarkable in these viruses. These compounds did not affect infectivity of mature virions, indicating no effect on the early steps of the …

Am I Another Statistic?: A Phenomenological Study Of Border Region At-Risk Latina/O Youth, Virginia Martinez

Open Access Theses & Dissertations

As diversity continues to increase in the United States, schools are facing an enormous challenge of educating youth to function effectively in our democracy. With the growing Latina/o population, it is essential that schools accommodate to the needs of what will be the largest ethnic or race minority. The purpose of this qualitative phenomenological study was to analyze and study past at-risk students' unique predicament and determine two factors of failure; encouragement by failure and discouragement by failure. The study focused on understanding the role of failure as a main contributor in the decision making of Latina/o at-risk students dropping …

Analysis Of Road Vehicle Aerodynamics With Computational Fluid Dynamics, Christian Armando Mata

Open Access Theses & Dissertations

A road vehicles aerodynamics can be one of the most influential aspects of its performance. With the increased importance on fuel efficiency in recent years, new road vehicles are being developed smaller in size, with smaller displacement engines, as well as with improved aerodynamics. The aerodynamics of a vehicle can have a significant effect on its fuel efficiency, as well as other important aspects of the vehicles performance such as the top speed, acceleration, and handling. A study focusing on analyzing aerodynamic effects due to vehicle geometries such as wheels covered by the vehicles body in comparison to open wheels …

Deception Detection In Dyads, Lorae Marquez

Open Access Theses & Dissertations

The aim of the present study was to determine whether it is possible to detect deception during the interview of a dyad by observing the nonverbal "partner monitoring" behavior of one dyad partner while the other partner is telling a lie. This study also aimed to assess whether individual differences in the Big Five personality traits, Absorption, and Imaginative Suggestibility are correlated with partner monitoring when one's partner is telling a lie. Undergraduate psychology students (N=94) were grouped in dyads and asked to play a game that involved one member of the dyad lying and the other member telling the …

Educational Use Of Social Media: Exploring Science And Engineering College Students' Perceptions About Utilizing Facebook To Enhance The Learning Of Physics, Angel Salvador Marquez

Open Access Theses & Dissertations

The aim of this qualitative investigation is to explore a group of science and engineering students' perceptions about utilizing Facebook to enhance the learning of physics. Particularly, a survey composed of multiple choice and open-ended questions was employed as to obtain participantsâ?? reactions on a proposed scenario where Facebook is utilized in an Introductory Classical Mechanics course as the medium to manage the following academic activities throughout the semester: examinations, class preparations, study guides, homework assignments, lab preparations, creating group studies, and class participation dynamics. Out of the 120 potential candidates, 106 of them accepted to voluntarily participate in this …

Structural And Stratigraphic Development Of A Salt Diapir Shoulder, Gypsum Valley, Colorado, Joshua Coleman Mcfarland

Open Access Theses & Dissertations

A salt shoulder is a low-angle segment of the salt-sediment interface where the margin of a passive diapir steps abruptly inboard. The Late Triassic Chinle Formation overlies caprock on the northeastern margin of Gypsum Valley (GV) at the salt-sediment interface in the natural amphitheater of Bridge Canyon. Modern erosion of the Dolores River has created 3D outcrop of the salt shoulder, expressed by a 500 meter wide, sub-horizontal platform that dips abruptly into the subsurface to the northeast toward the Dry Creek minibasin. Within Bridge Canyon, seven facies associations have been recognized and interpreted within the Chinle Formation: 1) non-caprock …

Design Structure Method As Applied To The Structural Organization Of A 5th Genertation Fighter Jet, Israel Michel Michel

Open Access Theses & Dissertations

In current times, the demand for protection against enemies in a volatile geopolitical climate is an increasingly demanding concern. Many countries invest billions of dollars attempting to protect their borders and in fact strive to become the most powerful and dominant war power in the world. As the dollar amount of each country increases, and while other countries seem to always beat each other, the path for innovations and demand is never ending. The complexity of each project continues to grow as they become very sophisticated in their respective field.

In recent decades, itâ??s been proven that whoever reaches the …

Towards The Scalability And Hybrid Parallelization Of A Spatially Variant Lattice Algorithm, Henry Roger Moncada Lopez

Open Access Theses & Dissertations

The purpose of this research is to design a faster implementation of the spatially variant algorithm that improves its performance when it is running on a parallel computer system.

The spatially variant algorithm is used to synthesize a spatially variant lattice for a periodic electromagnetic structure. The algorithm has the ability to spatially vary the unit cell orientation and exploit its directional dependencies. The algorithm produces a lattice that is smooth, continuous and free of defects. The lattice spacing remains strikingly uniform when the unit cell orientation, lattice spacing, fill fraction and more are spatially varied. This is important for …

Tumbling Dice And Other Tales From A Life Untitled, Tammy Mckillip Mckillip

Open Access Theses & Dissertations

Tumbling Dice and Other Tales from a Life Untitled is a Thesis collection of memoir stories by Tammy Quinn McKillip.

The Relationship Between Leaders' Emotional Intelligence And Employees' Organizational Citizenship Behavior And Job-Related Affective Well-Being At Andrews University, Robert L. Overstreet

Dissertations

Problem

Research has been conducted linking high levels of Emotional Intelligence (EI) in leaders with organizational success. However, the link between leaders’ EI levels and workplace climate (as evidenced by employees’ Job-related Affective Well-being [JAW] and Organizational Citizenship Behavior [OCB] levels) has not been adequately understood. This study sought to improve the understanding of how employee affective well-being and citizenship behaviors are related to leaders’ EI, with additional consideration given to how the gender of those leaders may affect that relationship.

Method

A quantitative correlational research method has been chosen as an appropriate method for the research study in which …

Drama A Flor De Piel: Fiestas, Capellanías Y Cofradías En San Joseph Del Parral, Chihuahua, Siglos Xvii Y Xviii, Juana Moriel

Open Access Theses & Dissertations

Abstracto

Esta investigación utiliza el ritual religioso-universal del catolicismo para analizar la participación de grupos indígenas, mulatos, mestizos, y de las mujeres de la élite, en fiestas religiosas, cofradías y capellanías que tuvieron lugar en el pueblo minero de San Joseph del Parral a partir del primer tercio del siglo XVII y todo el siglo XVIII. Al utilizar el ritual como filtro, es posible observar que el pensamiento y el sentimiento barroco traído de España permitió la participación de los grupos mencionados. Con ésta ellos transformaron el ritual católico universal al hacerse una identidad y una memoria histórica que desde …

The Effects Of Learning About Black History On Racial Identity, Self-Efficacy, Self-Esteem, And Depression Among Low-Income African American Male Youth, Quentin L. Stubbins

Dissertations

Problem

The literature is clear that African American youth receive a shallow account from parents and schools about Black history. More importantly, African American male youth from low-income families rarely receive information about Black history. Youth today watch television for entertainment and through watching television learn about new facts and information. African American youth watch more television than any other ethnic group. The media has a long history of portraying African Americans in a negative light. The negative media portrayals of African Americans have impacted their racial identity, self-esteem, self-efficacy and their mental health. No research has been done on …

Bayesian Parameter Estimation For The Birnbaum-Saunders Distribution And Its Extension, Tun Lee Ng

Open Access Theses & Dissertations

We utilize the Bayesian approach to estimate the parameters of the Birnbaum-Saunders (BS) distribution devised by Birnbaum and Saunders (1969a), as well as the Generalized Birnbaum-Saunders (GBS) distribution obtained by Owen (2006), in the presence of random right censored data. We also derive the classical MLE expressions for the observed Information matrix of the GBS distribution, in order to illustrate the fact that no closed form expressions are available for the MLE, and numerical approximations are required to obtain the point estimates and asymptotic confidence intervals. Where Bayesian approach is concerned, new sets of priors are considered based on the …

Examining The Spanish Maysi-2 Translation Among Mexican Americans, Yolanda Denise Ochoa

Open Access Theses & Dissertations

Due to the increasing Latino population in the U.S., Spanish translations of mental health screening tools are needed to better serve Latinos, particularly those in juvenile justice settings. Screening tools are measures that flag mental health symptoms and indicate if further evaluation is needed. The most widely screening tool used in juvenile justice settings that has been translated into Spanish is the Massachusetts Youth Screening Instrument-Version 2 (MAYSI-2). To date, research has focused only on the English version of the MAYSI-2. The present study examined the equivalence of the Spanish translation of the MAYSI-2 to its English version in 18- …

Analysis Of Nitrogen Speciation And Removal In Direct Potable Reuse In El Paso, Texas, Oluwaseye Michael Owoseni

Open Access Theses & Dissertations

Population growth and increasing demand for potable water is causing a need for additional sources to water portfolios in areas with water scarcity. Direct Potable Reuse (DPR) is gaining recognition in these regions and ensuring appropriate measures for the removal of nitrogen and other contaminants cannot be overemphasized. Two nitrogen species, nitrate and nitrite are known to cause harmful effects on young infants below the age of six months. El Paso Water Utilities conducted a pilot test for DPR to ascertain the viability of DPR as an additional source to the current water portfolio.

Non-chlorinated secondary clarifier effluent from a …

Uranium-Series And Strontium Isotope Ratios In Soils From Basse-Terre Island, French Guadeloupe: Insights For Rapid Soil Formation And Impact Of Dust In A Tropical Volcanic Setting, Yvette Pereyra

Open Access Theses & Dissertations

Chemical weathering of silicate rocks generates soils that contain mineral nutrients, sustain ecosystems, modify water chemistry in the hydrosphere, and regulate the global carbon cycle. Understanding the timescales of soil formation and sources of soil mineral nutrients has great implications for securing the future of agriculture and food production. However, few tools are currently available to directly quantify the rates of chemical weathering and timescales of soil formation. Uranium-series isotopes fractionate during chemical weathering and the activity ratios of (234U/238U), (230Th/238U), (238U/232Th) and (230Th/232Th) have great potential to constrain the rates and timescales of chemical weathering and soil formation in …

An Investigation Of Motor Speech And Motor Limb Movements Following A Sport-Related Concussion-An Extension Study, Linda Phan

Open Access Theses & Dissertations

Background: Minimal research is available regarding the effects on motor speech and motor limb movements following a sport-related concussion (SRC). A sensitive measure is necessary to detect subtle deficits in motor speech, as it may provide diagnostic insight involving return-to- play decisions.

Purpose: This research aimed at replicating and extending a previous research study, Hewitt (2015), conducted at the University of Texas at El Paso. The Hewitt (2015) study examined motor speech tasks and motor limb tasks which included the following: oral diadochokinetics (DDK): sequential motion rate (SMR)(i.e. /puh-tuh-kuh/) and alternating motion rate (AMR) (i.e. /puhpuhpuh/, /tuhtuhtuh/, /kuhkuhkuh/); speech rate …

The 100 Precepts Of Orran Dain, Daniel Lee Pickles

Open Access Theses & Dissertations

A novel surrounding the mass-suicide of a cult in Northern Wisconsin.

Geology, Geochemistry, And 3d Geological Modelling Of The Independencia - Los Bancos Ag-Au Epithermal Vein Systems In The Palmarejo District, Chihuahua, Mexico, Arturo Ramirez

Open Access Theses & Dissertations

The Sierra Madre Occidental (SMO) is a Cretaceous-Tertiary silicic ignimbrite province in northwestern Mexico. It is the result of tectonic and magmatic events produced by the subduction of the Farallon plate under North America (80-40 Ma) and the opening of the Gulf of California (14-12 Ma), thus forming the SMO metallogenic provinces. The Late Eocene to Oligocene was a major period of metallic mineralization hosting various deposit types, principally Ag-Au (±Pb-Zn-Cu) epithermal veins, which have been economically significant.

The study area lies in the Palmarejo district, operated by Coeur Mining Inc., which was the worldâ??s fifth largest silver producer in …

Design And Evaluation Of The Impact Of A Multi-Agent Control System (Framework) Applied To A Social Setting, Perez Antonio Perez

Open Access Theses & Dissertations

The objective of this research is to design and analyze the performance of a new mechanism to improve the advising of students in a nontraditional environment. This nontraditional environment includes: a minority serving, commuter campus with a high percentage of transfer students. Specifically, these demographics are unable to keep a tightly controlled cohort of students flowing through to the completion of the curriculum. Students in these circumstances usually have varied course loads and competing priorities due to family and financial needs or other societal responsibilities. Therefore, there is a need for an individualized approach to advising.

University administrations face challenges …

Examining The Role Of Threat Processing In Memory Consolidation And Prejudice Formation, Stephanie Marie Reyes

Open Access Theses & Dissertations

Memory is a flexible system that integrates new incoming information into existing memory representations (Stickgold & Walker, 2007). Through sleep and over time, memories become stable via consolidation processes (Payne, Stickgold, Swanberg & Kensinger, 2008). Prejudice formation can occur through the consolidation of stereotype schemas. In a previous study Latino participants learned positive and negative trait information about in-group and out-group members (Enge, Lupo & Zárate, 2015). At test, participants responded more quickly to out-group targets paired with negative traits than in-group pairings with these traits. Findings indicate that participants also responded more quickly to in-group targets paired with positive …

A Semantically-Enabled Trust Model For Collaborative Environments, Joaquin Andres Reyna

Open Access Theses & Dissertations

The World Wide Web has revolutionized the way we find, exchange, reuse and integrate information at a rate inconceivable only a generation ago; but for all its perks it has one big weakness: trusting that the information retrieved is accurate. Web technologies and applications allows anyone to share information. This work aims to assist humans (and eventually autonomous agents) in the task of trusting Web resources, a very important step when reusing information found on the Web. In this research, we propose a new algorithm to tackle the challenge of assigning trust to Web resources. Our algorithm is inspired on …

National Evaluation For Development And Exploration Potential Of Mineral Commodities In Produced Waters, Stephanie Ray

Open Access Theses & Dissertations

The U.S. Geological Survey recently updated a geochemical database consisting of data for approximately 160,000 produced waters samples, primarily from petroleum and geothermal reservoirs. Using major and trace elements from conventional and unconventional well types from the database, this Thesis provides a comprehensive, national evaluation for mineral commodity potential in produced waters. Produced waters contain virtually every naturally occurring element and can range in salinity to several times that of seawater. Despite the typical outlook to view produced waters as a waste, they have potential for natural resource development.

This Thesis provides, for each mineral commodity found in the produced …

La Gente Entre Nosotros / The People Between Us, Gerard Stephen Robledo

Open Access Theses & Dissertations

This collection stems from the tradition of poetry of witness / anthro-poetry, and chronicles the lives of individuals within communities who are affected by racism, ignorance, and Americanization. The catalyst for this collection was the massive influx of immigrant children fleeing South and Central American, and Mexico to the United States in the summer of 2014. This event spurred a whirlwind of anger, confusion, and racism, which left children in the political crossfire. Thus, this collection is aptly titled La Gente Entre Nosotros / The People Between Us.

In this collection, I take the approach of the anthro-poet, to document …

Hagiografía Del Fuego, Marco Antonio Rodríguez Murillo

Open Access Theses & Dissertations

Hagiografía del fuego es un poemario que se conforma de cinco partes, que tratan de mapear la ciudad de El Paso, Texas, histórica como geográficamente.

The Effect Of A Fluent Signing Narrator On Children's Behavior During Technology-Enhanced Shared Reading With Children With Hearing Loss And Their Parents, Gabriela Itzel Rodriguez

Open Access Theses & Dissertations

Shared reading plays an essential role in the language and literacy development of children who are at risk of future problems in those areas. Children with hearing loss (CHL) are a group who usually experience limited and poor quality activities that foster literacy development such as shared reading (SR). Researchers examining high quality interactions have rated child behaviors, primarily attention and initiation, during shared reading and play based activities finding positive correlations between these behaviors and the overall development in typically developing children as well as in children with other impairments such as Autism Spectrum Disorder and Down syndrome (Kim …

Improving The Engineering Properties Of Pla For 3d Printing And Beyond, Carmen R. Rocha

Open Access Theses & Dissertations

Additive manufacturing (AM), now more commonly known as 3D printing, has been classified as efficient, fast, and practical in the prototyping sector of product development. In the work presented here, we will use one of the AM techniques known as Material extrusion 3D printing (ME3DP), which has all the advantages of AM. However, one of the biggest challenges facing ME3DP technologies is the limitation of the range of materials used by this technique. Acrylonitrile butadiene styrene (ABS) and poly-lactic acid (PLA) are currently the most common thermoplastics materials used in ME3DP because of their ability to melt and be reprocessed. …

Intrinsic And Metal-Doped Gallium Oxide Based High-Temperature Oxygen Sensors For Combustion Processes, Ernesto Javier Rubio

Open Access Theses & Dissertations

Currently, there is enormous interest in research, development and optimization of the combustion processes for energy harvesting. Recent statistical and economic analyses estimated that by improving the coal-based firing/combustion processes in the power plants, savings up to ~$450-500 million yearly can be achieved. Advanced sensors and controls capable of withstanding extreme environments such as high temperatures, highly corrosive atmospheres, and high pressures are critical to such efficiency enhancement and cost savings. For instance, optimization of the combustion processes in power generation systems can be achieved by sensing, monitoring and control of oxygen, which is a measure of the completeness of …