Digital Commons Network^™

Objectification Of Gay African American Males In The Bondage Discipline Sadism Masochism Community, Gregory Wayne Jackson Jr

Walden Dissertations and Doctoral Studies

The purpose of this phenomenological study was to improve the understanding of Sexual Objectification (SO) of gay African American males in the bondage, discipline, sadism, masochism (BDSM) community. Although many studies have been conducted on SO of women and other minority populations, there is a lack of research on the lived experience of gay African American males participating in the BDSM community. The theoretical framework for this study was Fredrickson and Roberts's objectification theory, with a conceptual framework focused on SO that gay African American males experienced while participating in the BDSM community. The research questions were designed to elicit …

Special Education Teachers' Voices On Co-Planning In A Suburban School District, Corinne Jeffers

Walden Dissertations and Doctoral Studies

Limited co-planning between special education and general education co-teaching partners has been documented in professional literature as a significant problem. Special education teachers do not adequately co-plan for the implementation of accommodations for students with disabilities educated in the general education classroom. The purpose of this study was to collect and analyze the perceptions of special education teachers in one suburban elementary school district in the United States regarding co-planning with regular education teachers. The theory of self-efficacy was utilized as the conceptual framework to understand how teachers' beliefs and experiences influenced planning and goal setting for special education students. …

An In-Depth Evaluation Of Shear Box Compactor For Hot Mix Asphalt, Isaac Jaime Aguilar

Open Access Theses & Dissertations

Asphalt pavement is present in each roadway in every town or city today and it is paramount to properly design pavement to efficiently reduce its deterioration. To determine how pavement fails, pavement specimens prepared in the laboratory undergo performance tests which demonstrate the pavements strength and durability. Performance tests require little variability from compacted specimens, and it is critical to have a compaction method which is similar to field compaction and produces homogenous specimens. Currently, laboratory performance test specimens are obtained with the Superpave Gyratory Compactor (SGC). That device has few similarities to the rolling compactor, which performs the actual …

Investigation Into The Role Of N-Terminal Acetylation Of Esat-6 In Pathogenesis Of Mycobacterium Tuberculosis, Javier A. Aguilera

Open Access Theses & Dissertations

Mycobacterium tuberculosis (Mtb), the causative agent for the disease Tuberculosis (TB) in humans, is present as a latent infection in approximately one third of the world's population. Mtb has become more resilient over the years. The vaccine, Mycobacterium bovis bacillus Calmette-Guerin (BCG), loses effectiveness 10 years after initial vaccination. Recent research has found 6-kD early secretory antigenic target (ESAT-6) and 10-kD culture filtrate protein (CFP-10) are secreted as a heterodimer by Mtb and play important roles in virulence. Additionally, ESAT-6 has been determined to contain membrane lytic activity while CFP-10 has been suggested to be a molecular chaperone. Studies suggest …

Developing A System Dynamics Model Of The El Paso Water Resources System, Majid Alahmoradi

Open Access Theses & Dissertations

The city of El Paso is growing rapidly, increasing water demand in a water-scarce region. In this research system dynamics modeling is applied to simulate dynamic behavior of the El Paso water resources system in order to investigate the city's portfolio based upon a supply-demand side and demand side management approach. System Dynamic simulation involves several steps, including system conceptualization, data collection, simulation model development, and model verification and sensitivity analysis. A high-level conceptualization of the El Paso water resources system is presented, including withdrawal sources, water and wastewater treatment facilities, water demands, and flow linkages are will be presented. …

Error Correction Exchange Rate Modeling For Bangladesh, Dipanwita Barai

Open Access Theses & Dissertations

Several error correction models are estimated for analyzing the nominal exchange rate dynamics of Bangladesh between the taka and the United States dollar using annual data. The theoretical frameworks utilized include balance of payments and the monetary construct. The bilateral taka / dollar exchange rate model based on the balance of payments approach exhibits better econometric and statistical traits than the model based on the monetary construct. Out-of-sample simulation indicates, however, that the balance of payments ARDL model does not generate very accurate forecasts for this bilateral exchange rate.

Characterization & Extraction Of Extracellular Matrix From Porcine Adipose Tissue, Rahulkumar Kantibhia Bhoi

Open Access Theses & Dissertations

Tissue in particular extracellular matrix(ECM) plays a vital role in the growth and the function of each cell types and promote tissue regeneration and repair an impair organs. Many techniques have been developed so far to decellularized porcine tissue for the purpose to use as regenerative medicine and in tissue engineering. We aimed to optimized a method to decellularized porcine tissue while effectively eliminating xenogeneic epitopes, lipids and to retain necessary component of it intact without disrupting ECM. We have developed 2-week protocol to optimize well preserved ECM component that may keep xenogeneic biomaterial for tissue engineering and regenerative medicine. …

Constraining Times Of Extension In The Southern Rio Grande Rift And Basin And Range Using Apatite And Zircon (U-Th)/He Thermochronology, Julian Biddle

Open Access Theses & Dissertations

The Rio Grande rift and the Basin and Range are adjacent extensional domains that have evolved contemporaneously in western North America. Although the rift is often considered to be the easternmost boundary of Basin and Range extension, there is geologic and geophysical evidence that suggests the two are discrete provinces. Existing low-temperature thermochronologic data indicate that a period of synchronous extension occurred across the entire length of the rift from ~25-10 Ma. However, these studies were more focused on the northern and central sections of the rift, and thermochronologic data remains sparse in southern New Mexico. We collected rock samples …

Characterization Of Electrically Conductive Inks In Simulated Space Environment, Kazi Md Masum Billah

Open Access Theses & Dissertations

Increasing numbers of satellite missions necessitate a standalone power supply with self-recovery capabilities in case of failure in the space environment. A self-repairing kit was developed with the capabilities to repair the damaged solar array by dispensing conductive inks. Dispensing of conductive materials using direct writing technology to the space environment not only repairs damaged electronic components but also demonstrates the possibilities of manufacturing in outer space. For earth application, properties of direct writing inks have been evolved. In space application, direct writing inks or conductive inks have some issues such as outgassing, vapor pressure, curing etc.Therefore, having the properties …

Seeds Of Neocolonialism In Development Discourse: A Study Of Neoliberal "Megarhetorics" Of Global Development And Ecofeminist Resistance, Moushumi Biswas

Open Access Theses & Dissertations

This paper is based on a case study of www.monsanto.com, the official website of biotech company Monsanto, and transnational voices of resistance as exemplified by eco-critical activist Vandana Shiva. My rhetorical inquiry concerns the future of the global farming sector and allows for an interdisciplinary exploration of transnational development discourse through the overlapping but complementary lenses of ecofeminism and critical discourse analysis (CDA). The purpose of my study – spanning rhetoric, composition, critical theory, cultural theory, communication studies, business ethics, and postcolonial studies – is to trace new notions of discourse creation in the 21 st century using a combination …

Theoretical Acoustic Absorber Design Approach For Lox/Lch4 Pintle Injector Rocket Engines, Jonathan Candelaria

Open Access Theses & Dissertations

Liquid rocket engines, or LREs, have served a key role in space exploration efforts. One current effort involves the utilization of liquid oxygen (LOX) and liquid methane (LCH4) LREs to explore Mars with in-situ resource utilization for propellant production. This on-site production of propellant will allow for greater payload allocation instead of fuel to travel to the Mars surface, and refueling of propellants to travel back to Earth. More useable mass yields a greater benefit to cost ratio. The University of Texas at El Paso's (UTEP) Center for Space Exploration and Technology Research Center (cSETR) aims to further advance these …

4-Nonylphenol Induces Neurodegeneration By Altering Cytoskeleton, Cynthia Carreon

Open Access Theses & Dissertations

4-nonylphenol (4-NP), an endocrine-disrupting compound (EDC), has been shown to affect brain development and may cause neurodegeneration. In the environment, 4-NP arises as a degradation product of alkylphenol polyethoxylates, compounds widely used as nonionic surfactants in commercial production, as well as in herbicides, pesticides, polystyrene plastics, and paints and has been shown to undergo a high level of accumulation in biological tissues. However, the mechanism by which 4-NP exerts its effect is not understood. Recent results from our laboratory indicate that Gβγ, an important component of the G protein-signaling pathway, induces neuronal outgrowth and differentiation by modulating microtubule (MT) assembly, …

Organic-Inorganic Graphite And Transition Metal Dichalcogenide Based Composites For 3d Printing, Jorge Alfredo Catalan Gonzalez

Open Access Theses & Dissertations

This project was multipronged to help fuse together topics of additive manufacturing and two-dimensional (2D) layered materials, and studying the mechanical and electrical properties of the composites produced. The composites are made from the thermoplastic polymer acting as a matrix and the graphite and 2D transition metal dichalcogenides (TMDs) serving as the filler or reinforcement. Different concentrations of TMD's were added to the matrix to study the effect of composition on the mechanical and electrical properties. To shed insights into the mechanical properties, test coupons were produced as "dog bone" structures for tensile testing using the ASTM D638 type 5 …

From The Fangs Of Monsters: Gender, Empire, And Civilization In The Pacific, 1800-1850, Michael David Chavez

Open Access Theses & Dissertations

As the nineteenth century commenced, contact between Pacific Islanders and Anglo-Americans increased as did the concern for what resulted from those interactions. In the United States, antebellum restrained men––those who upheld their Protestant faith, self-reliance, and familial values––used ideals of gender to combat the perceived “savagery” of Pacific Islanders and the corruption of American sailors among them. In the mission field, restrained men consciously sought after Anglo-American women’s influence often believing them to be the moral authority of a softer form of empire. This particular form of empire was not government led; nor did it entail the immediate conquest of …

The White Rose Movement: The Rhetorical Situation And Rhetorical Stances Surrounding The Six Anti-Nazi/Anti-War Leaflets, Veronica Ruth Cruz

Open Access Theses & Dissertations

This study focuses on the White Rose Movement's six anti-war/anti-Nazi leaflets the Movement produced and distributed between June 1942 and February 22, 1943 in Munich, Germany. The persuasiveness of the non-violent resistance Movement was analyzed and discussed using a Bitzerean and Booth rhetorical analysis. Though numerous active and passive social protests, such as marches, music, and rallies, have been examined rhetorically in the past, the research surrounding the written form of protest is minor. In direct regards to the White Rose Movement, specifically, the Movement has yet to be examined through a rhetorical lens until now. The Movement and its …

Cultivating Social Capital In Undergraduate Research: Key Sources And Distinctions By Gender, Heather Ann Daniels

Open Access Theses & Dissertations

Women are outpacing men in overall educational attainment, however this is not the case in science, technology, engineering, and mathematics (STEM) fields when women fall behind men. Establishing strong social connections is important to retention in STEM fields and persistence in the STEM pipeline. This study qualitatively examines what serves as social capital in STEM-focused undergraduate research and how social capital is accrued and deployed differently by men and women in ways that could be contributing to the gender gap in STEM. 17 students participating in external summer research programs at 12 different universities were interviewed at 3 points in …

Methods For Producing Graphene From Petroleum By-Products, Eva M. Deemer

Open Access Theses & Dissertations

N/A

A Study Of Hippocampal Microglia Distribution In Pre-Adolescent Mice Chronically Exposed To Lead, Salvador Dominguez

Open Access Theses & Dissertations

Background: Lead is a major unresolved child health hazard. Children are uniquely vulnerable to the effects of lead exposure, which include disruption of brain development and brain function. How lead exposure alters brain development and brain function is not currently known. Our laboratory has been developing a mouse model to understand effects of low-level lead exposure in the developing brain. In previous studies, we have shown that early chronic low level lead exposure diminished the number of microglia in the dentate gyrus region of the hippocampus, an area responsible for learning and memory. Building on the results of the previous …

Trade Cluster Impacts On Southern Border Transportation Costs, Ernesto Duarte Ronquillo

Open Access Theses & Dissertations

This Thesis develops a fixed effect model to analyze the impact of trade clusters on transportation costs. CIF/FOB ratios are utilized as the measures for transportation costs. Grubel-Lloyd and Herfindahl-Hirschman indexes are utilized as variables that identify trade clusters. The focus of this study encompasses four custom districts (El Paso, Laredo, Nogales, and San Diego) located on the southern border of the United-States over the period of 1995-2015. Driscoll-Kraay robust standard errors are calculated for each estimated model. The 9/11 terrorist attack effects are taken into account in the fixed effect model. Empirical results suggest that trade clusters have a …

Influence Of Overlay Thickness On Interface Bonding, Aliasghar Dormohammadi

Open Access Theses & Dissertations

Overlaying is an efficient and proven pavement preservation approach for flexible pavements. The overlay thickness varies from 1 in. to 4 in. depending on the conditions of the existing pavement, financial resources, etc. In the recent decade, financial constraints in conjunction with the push for pavement preservation, the overlay thickness is being reduced to less than an in. The ultra-thin overlay is a new cost-effective method that can be used to preserve functional pavement problems and provide satisfactory ride quality. Although studies have been conducted to evaluate pavement systems using numerical simulation, the research in the area of evaluating existing …

Structural Modifications In The Rbxcs1-Xpo 4 (0 ≤ X ≤ 1) Superprotonic Conductor Series: A Single-Crystal X-Ray Diffraction And Impedance Spectroscopy Study, Andres Jose Encerrado Manriquez

Open Access Theses & Dissertations

We have used single-crystal X-ray diffraction measurements to investigate the structural modifications induced by Rb-doping of the protonic conductor CsH2PO4. Data collected on the RbxCs 1-xH2PO4 (0 ≤ x ≤ 1) series shows that the monoclinic P21/m CsH2PO4 presentation persists upon Rb-doping up until x = 0.8. Rb0.8Cs0.2H2PO 4 exhibits a previously unreported P21/c monoclinic structure, where the mirror plane is lost and disorder is present in the PO4 tetrahedra even at room temperature. Higher levels of x display a tetragonal I-42d unit cell isomorphic with the known structure of RbH2PO 4. The temperature dependence of the proton conductivity determined …

/S/ Aspiration In Ciudad Juárez And Speech Accommodation, Sandra Esparza

Open Access Theses & Dissertations

Phonological variation in Spanish mainly affects consonants rather than vowels. One of the consonants that is part of the variation is /s/ (Hualde, 2005). The phonological process that commonly affects /s/ is aspiration and is defined as the absence of the oral place features while a glottal friction is retained (Clements, 1985). Aspiration occurs in about half of the Spanish-speaking world (Terrell, 1981) and constitutes one of the most useful stylistic and sociolinguistic variables that characterizes Spanish social dialects and discourse models (Lipski, 1991). Aspiration is present in several Spanish dialects in Latin America (Resnick, 1975). In the specific case …

On-Orbit Autonomous Repair: Systems Design And Project Management Of The Orbital Factory Ii Cube-Satellite, Mike Louis Everett

Open Access Theses & Dissertations

In 2016, a group of faculty, staff and students from the University of Texas at El Paso submitted a formal entry to the ULA CubeCorp competition to launch a 1U Cube Satellite into Orbit. In September of 2016, the team was awarded a launch opportunity to a prestigious GTO orbit to test and validate electrically conductive printing on within the Van Allen Radiation belts. This Dissertation is focused upon the management plan and specific decision that were implemented to accomplish this goal within a one year time frame and on a conservative budget.

In 2018 this satellite will launch aboard …

Octopamine In Sexual Behavior, Ana Isabel Fernandez

Open Access Theses & Dissertations

Octopamine is a biogenic amine neuromodulator present in neuronal and non-neuronal tissues in invertebrates (Roeder, 1999). It modulates numerous physiological processes such as motivation, pheromone response, olfaction, ovulation, learning and memory. Octopamine together with its precursor tyramine have roles restricted only to invertebrates (Roeder, 1999). It is believed that octopamine is the invertebrate homolog of norepinephrine, a catecholamine present in mammals that acts as a neuromodulator in the sympathetic and central nervous systems. Both octopamine and norepinephrine are derived from the same amino acid tyrosine and are monoamine neurotransmitters. The main objective of this study is to understand the role …

Predicting Individualized Treatment Effects Via Random Forests Of Interaction Trees, Annette Pena Franco

Open Access Theses & Dissertations

Abstract Not Available

A Behavioral And Neuroimmune System Model Of The Effects Of Chronic Low-Level Lead Exposure In Young Male C57bl/6j Mice, Mayra Gisel Flores-Montoya

Open Access Theses & Dissertations

Chronic low-level lead exposure reduces memory in children however the brain mechanisms mediating these effects are not known. In previous studies we showed that early lead exposure reduced olfactory memory and exploratory behavior in young mice, and reduced microglia cell density in hippocampus/dentate gyrus. The present studies aimed to identify additional behavioral tests that were sensitive to early low-level lead exposure in young mice; and to examine whether microglia upregulated factors known to promote cell migration. Seventy-two C57BL/6J male mice were exposed to 0 ppm (controls), 30 ppm (low-dose), or 430 ppm (high-dose) of lead acetate via dams' milk from …

Behavior Of Sandwich Composite Cores Under Extreme Conditions, Carlos Daniel Garcia Perez

Open Access Theses & Dissertations

The use of composite structures for diverse applications have become of great interest for scientists and engineers thanks to the advantages that they may offer in comparison to conventional materials. In the case of sandwich composite structures, its mechanical properties can be tailored according to the necessities through the correct selection of a core and facesheets. In combination, this "new" material will have superior properties compared to traditional materials such as steel and aluminum. For arctic exploration, a core with low moisture absorption, low density, and resistance to extreme, low temperatures is desirable for this type of application. This Thesis …

Evaluation Of Pertussis Knowledge Within The Child Daycare Staff And Management In The El Paso, Texas, Diana Jaqueline Gomez

Open Access Theses & Dissertations

BACKGROUND: Child daycare centers have an enormous influence on the children's health, which is important to maintain daycare staff and management informed on how to prevent communicable diseases, such as pertussis. Bordetella pertussis (Bp), the causative agent of whooping cough, is a small gram-negative bacterium that infects the nasopharynx of humans, which are the only reservoir. Bp is a highly contagious respiratory disease, which continues to be a severe disease in infants. The disease affects all ages and is easily transmitted from person to person, through respiratory droplets. Even though there is a vaccine available for all ages there are …

My First Moon, Guadalupe Garcí­A Mccall

Open Access Theses & Dissertations

In his book, The Storytelling Animal, Jonathan Gottschall states that a "Story's role in human life extends far beyond conventional novels or films. Story, and a variety of storylike activities, dominates human life" (8). This quote illustrates how important writing and writers are in our society. This idea resonates with my deeply felt need to create meaningful work, work that will make its way into the fabric of our social structure, work that will improve and elevate life for humanity and the world our children will inherit.

One thing that is always of utmost concern to me as a writer …

Studies On Woven Carbon/Vinyl Ester Composites: Environmental Effects, Joining And Hybridization, Ricardo Garcia

Open Access Theses & Dissertations

The incessant demand for fiber reinforced polymer composites, or FRPCs, in industrial applications which desire materials that possess high strength-to-weight ratios, generates a theory-to-practice void which must be filled with scientific research. In this Thesis, woven carbon/vinyl ester composites are studied under a wide spectrum of settings and conditions. The adverse effects of sea water environment and arctic temperatures on such mentioned composites are explored in the form of moisture uptake, impact on flexural modulus, strength and structural damage. It was found that sea water saturation in general degrades the flexural strength up to 19.45%, and arctic exposure and combined …