Digital Commons Network^™

Hierarchical Multiplicity Control Methods For Linear Models, Dimuthu Dilshan Fernando

Open Access Theses & Dissertations

HypoThesis testing is a commonly used statistical inference technique on which a statement of the population is investigated through the evidence from a representative sample of the population. With simultaneous testing of more than one null hypotheses need for an appropriate multiple comparison method is essential. With motivation from the study of Bogomolov et al. (2017) we have modified a multiple comparison tree structure to build the required comparisons and focus on controlling the FWER (Family Wise Error Rate) using the Bonferroni procedure. The proposed method has advantages such as controlling the global error rates separately at each level, families …

Environmental And Genetic Factors Affecting Antibiotic Resistance Of Extended Spectrum Î?-Lactamase Bacteria From The Rio Grande River In El Paso, Tx And Cd. Juarez, Mexico, Maria D. Fuentes

Open Access Theses & Dissertations

Background: The Rio Grande River provides a major source of potable and agricultural water for the population of the Texas/Mexico border region. Cattle farming and ranching are the most prevalent activities, which may contribute to the microbial burden of pharmaceuticals into our state's water resources. Antibiotics, presumably released into the environment by discharges originating from waste-water treatment plants, septic disposal systems, animal feeding operations and urban runoff have a definite impact on the ecosystem and may contribute to an increase in antibiotic resistance. We hypothesized that waters of the Rio Grande River contained Multi Drug Resistant Organisms (MDRO) and mobile …

Interference Analysis And Mitigation Of Telemetry (Tm) And 4g Long-Term Evolution (Lte) Systems In Adjacent Spectrum Bands, Juan Francisco Gonzalez

Open Access Theses & Dissertations

Currently, the telecommunications, radio systems, and many other wireless services in the United States are using the spectrum from the 6 kHz to the 300 GHz frequencies. Although it may seem enough for said systems, as more users and devices are being introduced into the market, the spectrum is limiting the faster introduction of these devices and/or systems. The radio frequency spectrum is home to many transmissions, from amateur radio to cellphone applications, which all share similar frequency bands. By sharing, the number of applications can be increased in a single band, but their performance may be affected. Herein, experiments …

Communication Barriers Between Patients And Healthcare Providers Regarding Disclosure Of Herbal Product Use, Armando S. Gonzalez

Open Access Theses & Dissertations

A considerable portion of our international border Hispanic population traditionally uses medicinal herbs as an alternative option for treating various chronic diseases and may take them alongside prescribed medications. More in-depth research is very necessary to determine why and under what conditions patients use herbs concomitant to medications, and why many do not discuss this with their physicians. Barriers to communication between patients and healthcare providers can encourage non-disclosure of herbal product use, which may interfere with prescribed medications, placing patients at serious risk for various herb-drug interactions. This qualitative descriptive study utilized purposive sampling, employing six focus groups consisting …

Combustion Joining Of Regolith Tiles For The Construction Of Launch And Landing Pads On The Moon And Mars, Robert Edwin Ferguson

Open Access Theses & Dissertations

Combustion-based methods are attractive for space manufacturing because the use of chemical energy stored in reactants dramatically decreases the required external energy input. Recently, a sintering technique has been developed for converting lunar/Martian regolith into ceramic tiles, but it is unclear how to build a reliable launch/landing pad from these tiles with small amounts of energy and materials. Here the feasibility of joining regolith tiles using self-propagating high-temperature reactions between two metals powders is explored. Combustion of a 1:1 molar aluminum/nickel mixture placed in a gap between two tiles, made of JSC-1A lunar regolith simulant, was studied in an argon …

2018-2019 Graduate Catalog, Morehead State University.

Morehead State Catalog Archive

2017-2018 Graduate catalog for Morehead State University.

Writing Center Data Collection And Analysis: Creating A Survey System For Collecting Data And Communicating Effectiveness, Louis Herman

Open Access Theses & Dissertations

No Abstract

An Adaptive Creep Modeling Approach Using Metamodeling, Mohammad Shafinul Haque

Open Access Theses & Dissertations

Recent drives to increase the efficiency of existing fossil energy power plants and the development of Advanced Ultrasupercritical power plants, have led to designs with steam pressures above 4000 psi and temperatures exceeding 1400°F. The complexity of the applied thermo-mechano chemical boundary conditions makes it critically important to consider creep and creep related failures. A primary concern to FE practitioners is the determination of which constitutive models are the "best", capable of reproducing the mechanisms expected in an intended design accurately; as well as what experimental data sets are proper or "best" to use for fitting the constitutive parameters needed …

2018-2019 Undergraduate Catalog, Morehead State University.

Morehead State Catalog Archive

2018-2019 undergraduate catalog for Morehead State University.

Evaluating Fold And Thrust Systems Within An Inverted Basin: Indio Mounntains, West Texas, Myra Guerrero

Open Access Theses & Dissertations

Fold and thrust belts often are complicated by out of sequence thrust faulting and inverted basins display these structures particularly often due to reactivation of original normal faults as well as complex topographic evolution. The Indio Mountains lie along the northern margin of the Chihuahua trough which formed as a mid-Cretaceous extensional basin and was subsequently shortened during the Laramide orogeny, making the Indio Mountains an exceptional site for studies of structures produced by large scale basin inversion. This study focuses on the subsurface structures in a complexly imbricated thrust window developed along the paleo rift basin margin.

This study …

Geant4 Study Of Protons - Body Interactions, Omar Hernandez Rodriguez

Open Access Theses & Dissertations

Proton beam therapy for cancer treatment uses high-energy protons to destroy cancer cells, a problem that needs immediate attention is the determination of where in the body the protons are hitting, in real time, i.e. during the irradiation. One possibility is to pay attention to the gamma rays produced during the irradiation, and use the information they carry to infer the body part that produced the gamma ray.

This Thesis presents the results of an investigation of the interaction of protons with different body parts. Focusing on gamma ray-producing interactions, the goal is to determine the type of interaction that …

Predictive Modeling On The Piezoelectric Properties Of 3d Printed Functional Nanocomposites Using The Data Analytics Approach, Md Didarul Islam

Open Access Theses & Dissertations

This paper presents research done on prediction modeling using a data analytics approach to determine various factors affecting the piezoelectric properties of the 3D printed pressure sensors. Previously, the material extrusion 3D printing technique was used to fabricate pressure sensors composed of multiwall carbon nanotubes (CNT), barium titanate (BT), and polyvinylidene fluoride (PVDF) using simple fabrication and low-cost methods. This sensor produced a voltage output of 725 mV (0.13 pC/N) which is enough for pressure sensing applications. However, a holistic study to determine impacts of all factors was not carried out in the previous model. In this study, the design …

Tunable Surface Interactions In Adsorbing Polymer Solutions, Sorour Hosseini

Open Access Theses & Dissertations

A simple formalism is suggested, to calculate the most likely configuration of a finite polymer, between two surfaces on which the monomers can adsorb. Grafted polymers typically enhance the stability of colloidal dispersions, via the long ranged steric repulsion due to the overlap of their polymer brushes, which can be thicker that the typical range of the DLVO interactions. However, if the polymers are adsorbing on the colloidal surfaces, there is the possibility of bridge formation between particles and therefore long-range attractions are induced (a procedure commonly used for the flocculation of colloidal suspensions). The two effects are competing and …

Matroid - Based Variable Selection For Complex Data Structures, Wimarsha Thathsarani Jayanetti

Open Access Theses & Dissertations

This research project has the objective to extend use of the matroid algorithm using statistically based criteria, Joint/Multivariate Cumulants (Speed, 1983) and Effective Dependence (Pena & Rodriguez, 2003) to capture linear as well as non-linear higher order dependencies. We also improve variable selection for complex data structures using the proposed matroid algorithm. The limiting distribution of the joint cumulant was defined using U-statistics theory by Hoeffding (1948). U-statistics variance as theorized by Hoeffding provide a lower bound for the estimated variance, and our simulation results justify the use of Hoeffding U-statistic variance for determining a threshold for joint cumulants deviation …

Deep Down, Jessica Granger

Open Access Theses & Dissertations

N/A

A Novel Method For Fabricating Material Extrusion 3d Printed Polycarbonate Parts Reinforced With Continuous Carbon Fiber And Improvement Of Strength By Oven And Microwave Heat Treatment, Md Naim Jahangir

Open Access Theses & Dissertations

The study of continuous carbon fiber-based material extrusion FDM printed materials can eliminate the problem of lower strength of additive manufactured part. Additive manufacturing, the process of fabricating complex shaped specimen with a layer-by-layer manufacturing technique, is being utilized in industrial application rapidly. Though the biomedical application may not be literally dependent on strength property, the factor is not deniable for the structural uses of 3D printed polymers. Insufficient neck growth and adhesion between layers are the driving factors of lower strength. The presence of porosity in the 3D printed parts is a major drawback and studies showed that the …

Literacies Of The Disaster Zone: New Media Genres And Participatory Rhetorics After The 2010 Gulf Of Mexico Oil Spill, R. J. Lambert

Open Access Theses & Dissertations

On April 20, 2010, explosions at the British Petroleum (BP) Macondo Project in the Gulf of Mexico initiated what would become the world's largest accidental release of oil into the ocean. This ecological disaster, a unique combination of natural and human causes, is one of many significant traumas over approximately the last two decades that various stakeholders have documented, participated in, and responded to largely through the expanding and increasingly ubiquitous media of the internet, computers, cell phones, and other networked communicative technologies, which both enable and constrain the variety of responses to traumatic events.

This Dissertation improves our understanding …

Change In The Organization Socialization Of The United States Border Patrol's Basic Law Enforcement Training Academy: A Supervisor's Perspective, Vic M. Manjarrez

Open Access Theses & Dissertations

This study examines the role of a changed organizational socialization process on supervisory adaptation. The research study is motivated by the central question: how do supervisors adapt in their role as supervisors when the initial organizational socialization process has changed. Literature on socialization in policing has focused almost exclusively on long-term job satisfaction, while literature on police supervisory adaptation centers on leadership approaches. Previous research on police socialization clearly indicates the process is a series of stages filled with "rite of passages". There is no distinction between the socialization of a non-supervisor officer versus a supervisory officer. The literature is …

Changes In Fundamental Frequency Of Voice In A Group Of Transwomen Following Voice Modification Therapy, Emily Marquez

Open Access Theses & Dissertations

The term transgender refers to an individual that identifies with a gender that is different to the one given at birth. Individuals that are transgender experience conflict between the gender the individual identifies with and the sex they are born with. Individuals that are transgender may elect to go through a transition process so that their outward appearance is congruent with their gender identity. Part of the transition process may include voice modification therapy. Transgender individuals may seek voice modification therapy so that the outward appearance matches the voice. However, there is limited information regarding the efficacy of traditional voice …

Implementation Of Magnesium Alloy Az91d On Wire And Arc Additive Manufacturing, David Adrian Martinez Holguin

Open Access Theses & Dissertations

As progress on Additive Manufacturing (AM) techniques focusing on ceramics and polymers evolve, metals continue to be a challenging material to manipulate when fabricating products. Current methods, such as Selective Laser Sintering (SLS) and Electron Beam Melting (EBM) face many intrinsic limitations due to the nature of their processes. Material selection, elevated cost and low deposition rates are some of the barriers to consider when one of these methods is to be used for the fabrication of engineering products. The research here presented demonstrates the use of a Wire and Arc Additive Manufacturing (WAAM) system for the creation of metallic …

Exposure Of Kidney Bean (Phaseolus Vulgaris) Plants To Coated And Uncoated Zinc Oxide Nanomaterials Under Different Soil Conditions: Effects On Plant Growth And Seed Quality, Illya Aidee Medina Velo

Open Access Theses & Dissertations

Soil exposure to engineered nanomaterials (NMs) occurs through the intentional use of nano-agrochemicals, incidental contamination from industrial-waste release, irrigation with wastewater and gray water, or amendment with NM-loaded sludge. Although there are several reports about the effects of NMs in terrestrial plants, there is still a lack of knowledge about the effects of NMs in crop plants and their edible portions.

Among the large list of produced NMs, it is estimated that 34,000 tons of ZnO NMs are produced yearly. Due to their growing applications in cosmetics and personal care products, there is a high possibility that the ZnO NMs …

On Racial Barriers, Kayla Rachel Mehl

Open Access Theses & Dissertations

My Thesis examines: the nature of racial barriers, by what means racial barriers manifest in society, and the ways in which we can use racial barriers to evolve toward a more just society. I argue that within particular contexts a look of the Other will construct a racial barrier between racialized bodies. More specifically, when one perceives a threat from a look of the Other, one will undertake a particular-what social psychologists call-self-representation, in attempt to exhibit a particular type of persona they feel is called for in that context. Furthermore, I argue in my paper that racial barriers emerge …

Spatial Genres Of Revitalization: Desiring-Machines And The Production Of Public Subjects, Larry S. Morgan

Open Access Theses & Dissertations

This project, Spatial Genres of Revitalization: Desiring-Machines and the Production of Public Subjects, is guided by the need to understand how the recent changes in El Paso's gentrifying downtown are impacting the development of public subjectivities. This Thesis is concerned with how the formation of public subjectivities is occasioned by changes in a city undergoing "revitalization" in terms of how people move through urban space. At the same time it is also concerned with how the people moving these spaces imagine and configure it to different ends which surpass the intention and violence of gentrification.

To this end, Spatial Genres …

Indios To Vecinos: Identity And Classification In Paso Del Norte, Eric Murillo

Open Access Theses & Dissertations

Identity for Native Americans in the US-Mexico borderlands is still a challenge in many ways. Native Americans in the US-Mexico borderlands often struggle to be seen as such, and many are subjected to a fragmented identity. This research explores how Spanish colonial classification continues to affect Native Americans from the borderlands.

Characterization Of 3d Printed Polylactic Acid/ Polycaprolactone/Titanium Dioxide Composites For Bone Replacement And Grafting, Sandra Elena Najera Beltran

Open Access Theses & Dissertations

A material that mimics the properties of bones was developed by optimizing the ratio of polymer composites of polylactic acid (PLA) and poly-ε-caprolactone (PCL), containing small amounts of titanium oxide (TiO2). Although titanium-based alloys have commonly been used for bone replacement procedures due to their biocompatibility with the human body and their mechanical properties, stress shielding continues to be a problem. The structure of a bone has a porosity which permits the flow of nutrients, blood, oxygen and minerals, and is an issue at the time of creating bone replacements using conventional methods. PLA and PCL have been used in …

A Survey Of Youtube Video Resources For Helping Beginner Clarinetists Cross The Register Break, Flora Newberry

Open Access Theses & Dissertations

The internet is currently a much-used source of information for instruction and pedagogical information among students and teachers. The importance of the internet, specifically video instruction, in the dissemination of pedagogical information, combined with its largely unevaluated body of information, calls for serious study and consideration. It is necessary for the teaching community to understand the impact these resources have on teaching and learning, and how internet video resources can benefit teachers and students. This survey compares current video resources on YouTube for helping beginner clarinet players cross the clarinet register break, to the traditional print resources that make up …

Process Evaluation Of The Batterer Intervention And Prevention Program Of The Center Against Sexual And Family Violence In El Paso, Texas, Kathleen Anne O'Connor

Open Access Theses & Dissertations

Background: Intimate partner violence (IPV) is a significant public health issue. One in five women and one in seven men will experience severe physical violence from an intimate partner in their lifetime in the US; and one in three women globally (Breiding, Basile, Smith, Black, & Mahendra, 2015; World Health Organization, 2017). Notwithstanding such stark statistics, there is a gap in research on batterers and on batterer intervention and prevention programs (BIPP). Purpose: Program processes related to follow-up of clients were evaluated at the Center Against Sexual and Family Violence Batterer Intervention and Prevention Program (CASFV BIPP) through a mixed-methods …

A Voiced Labiodental Fricative [V] In El Paso Spanish, Roberto Israel Ortega

Open Access Theses & Dissertations

A Voiced Labiodental Fricative [V] in El The present study analyzes the voiced labiodental fricative [v] as a variant of the Spanish phoneme /b/ in El Paso Spanish under the scope of language contact. The data used was elicited from thirty one participants employing a task where the influence of the orthographic representation of the graphemes and was absent. Results are compared to previous studies where the influence of orthographic representation was present. This research analyzes the following three factors: 1) the linguistic factors of stress, position in word, and previous and following segments. 2) The social factors gender and …

The Design Of A Rocket Propulsion Labview Data Acquisition And Control System, Dylan Allan Ott

Open Access Theses & Dissertations

When designing a rocket engine, both the propulsion system and propellant choice(s) are an important deciding factor. Desired rocket engine behavior, specific impulse, and levels of thrust are all different between the various propulsion systems. A bi-propellant cryogenic liquid 5lbf, 500lbf, and 2000lbf rocket engine was designed and manufactured by UTEP. The 5lbf rocket engine is a Reaction Control Engine and the 500lbf and 2000lbf rocket engine is a throttleable Main Engine. To provide a reliable and safe data acquisition and control system for this experiment, a Real-Time control platform was needed. A compact DAQ system was purchased and configured …

Suicide Attempts In Latinx: Findings From A Household Survey Among A Predominantly Mexica-American Sample Living In El Paso, Tx, Giovanna Monique Perez

Open Access Theses & Dissertations

Suicidality in the U.S. has increased dramatically in recent years (Stone et al., 2018). In 2016, 1.3 million U.S. adults attempted suicide (NIMH, 2018). The demographic breakdown showed that Latinx adults had a suicide attempt rate of 6%. In addition, among Latinx adolescents rates were highest among Latinx students (11.3%) compared to white students (6.8%) (CDC, 2016). Latinx are the largest minority in the United States and make up 17% of the U.S. population (United States Census Bureau, 2016). El Paso presents a unique demographic since over 80% of the city's population is Latinx (Pew 2016). To date, there has …