Digital Commons Network^™

The Meteorological Conditions Affecting The Propagation Of Respiratory Diseases, Rosette Maria Gonzalez

Open Access Theses & Dissertations

Valley Fever, also known as Coccidioidomycosis, is endemic of the US Southwest. In 2012 this disease was the second most-reported disease in Arizona, according to the New Yorker January 2014 edition. The Paso Del Norte Region (PdN) is a semi-arid region with significant agricultural acreage and Valley Fever is known to be a threat in this region. It is our goal in this Thesis work to apply an existing PBL Height Program (e.g., Liu, et.al.) to the Paso Del Norte Region (PdN) to study the effect it has in the transmission of Valley Fever. Obtaining the PBLH as it evolves …

Physical Engagement As A Way To Increase Emotional Rapport In Interactions With Embodied Conversational Agents, Ivan Gris Sepulveda

Open Access Theses & Dissertations

One of the major goals in research on embodied conversational agents (ECAs) is to increase the believability and perceived trustworthiness of agents. To improve the efficacy of the interaction between humans and ECAs, I focus on the development of rapport, which is a complex and extensive behavioral state of affinity, synchronicity, coordination and mutual understanding that is difficult to model, measure and interpret. I present our AGENT Framework and our ECA, Adriana, which is capable of speech recognition and gesture recognition over long periods of time. Our current system provides up to 60 minutes of human-ECA interaction in a jungle-survival …

Multi-Expert Multi-Criteria Decision Making, Joel Henderson

Open Access Theses & Dissertations

Expert analysis and decisions are highly valued assets in a wide variety of fields, from social services to grant funding committees. However, the use of experts can be prohibitive due to either lack of availability or cost. As such, it is desirable to be able to replicate such decisions. However, there are many obstacles that impede an accurate simulation of expert decisions. For example, despite looking at the same information, two experts may disagree on the decisions. In addition, a single expert may make inconsistent decisions across similar scenarios.

In this work, we focus on multi-criteria decision making and in …

An Improved Sin-Hyperbolic Constitutive Model For Creep Deformation And Damage, Mohammad Shafinul Haque

Open Access Theses & Dissertations

Inspection and maintenance of industrial gas turbines (IGTs) cost millions of dollars. Growing demand of obtaining higher IGT efficiency leads to higher temperature and pressure operating conditions. Long exposure of turbine components at elevated temperature and pressure

makes creep damage critically important to consider during planning, designing and operating conditions. Effective and economic maintenance requires accurate creep deformation, damage

evolution and rupture life prediction information. Creep prediction models are used to determine the state of the turbine components and to schedule the inspection, maintenance and replacement time periods. The more accurate the prediction model, the less is the overall cost …

Market Reactions To Businesses' Actions Towards People With Disabilities: Making The Business Case In The International Context, Claudia Araceli Hernández González

Open Access Theses & Dissertations

From the business point of view, people with disabilities still suffer discrimination in employment and lack of accessibility as customers. Opposing, as recipients of philanthropic efforts many individuals and firms donate resources to improve the life of people with disabilities. These actions demonstrate how the majority of the population is still fixed in a medical model of disability by trying to repair the person to conform to the social norm, instead of accepting that many disabilities do not undermine other abilities. However, there is little evidence of how these actions impact the financial performance of the organization. This study attempts …

Beneath The Kiss: Unearthing The Ideological Underpinnings Of Kay Jewelers Advertisements, Chelsea Nedlyn Hill

Open Access Theses & Dissertations

ABSTRACT

Advertising is a frequently used influential and persuasive means of communication, such as Kay Jewelers, a corporation whose advertising methods have been superficially appealing to a female audience. However, this study sought to investigate the ideological underpinnings associated with Kay Jewelers advertisements, employing an ideological criticism to argue through feminist theory that Kay Jewelers utilizes key elements of heteronormative love as a means to persuade and influence men to purchase their jewelry products. Through this underpinning of heteronormative romance, Kay Jewelers emphasizes the notion that an artifact, like a piece of jewelry, is necessary in order to properly express …

High Temperature Helical Tubular Receiver For Concentrating Solar Power System, Nazmul Hossain

Open Access Theses & Dissertations

In the field of conventional cleaner power generation technology, concentrating solar power systems have introduced remarkable opportunity. In a solar power tower, solar energy concentrated by the heliostats at a single point produces very high temperature. Falling solid particles or heat transfer fluid passing through that high temperature region absorbs heat to generate electricity. Increasing the residence time will result in more heat gain and increase efficiency. A novel design of solar receiver for both fluid and solid particle is approached in this paper which can increase residence time resulting in higher temperature gain in one cycle compared to conventional …

Design Of A High Intensity Turbulent Combustion System, Mohammad Arif Hossain

Open Access Theses & Dissertations

In order to design next generation gas turbine combustor and rocket engines, a systematic study of flame structure at high intensity turbulent flow is necessary. The fundamental study of turbulent premixed combustion has been a major research concern for decades. The work is focused on the design and development of a high intensity turbulent combustion system which can be operated at compressible (0.3 < M < 0.5), preheated (T0=500K) and premixed conditions in order to investigate the 'Thickened Flame' regime. An air-methane mixture has been used as the fuel for this study. An optically accessible backward-facing step stabilized combustor has been designed for a maximum operating pressure of 6 bar. A grid has been introduced with different blockage ratios (BR = 54%, 61% & 67%) in order to generate turbulence inside the combustor for the experiment. Optical access is provided via quartz windows on three sides of the combustion chamber. Finite Element Analysis (FEA) is done in order to verify the structural integrity of the combustor at rated conditions. In order to increase the inlet temperature of the air, a heating section was designed to use commercially available in-line heaters. Separate cooling subsystems have been designed for chamber cooling and exhaust cooling. The LabVIEW software interface has been selected as the control mechanism for the experimental setup. A 10 kHz Time Resolved Particle Image Velocimetry (TR-PIV) system and a 3 kHz Planer Laser Induced Fluorescence (PLIF) system have been integrated with the system in order to diagnose the flow field and the flame respectively. The primary understanding of the flow field inside the combustor was achieved through the use of Detached Eddy Simulation (DES) by using commercially available software package ANSYS FLUENT. Preliminary validation is done by 10 kHz TR-PIV technique. Both qualitative and quantitative analysis have been done for CFD and experiment. Major flow parameters such as average velocity, fluctuation of velocity, kinetic energy, and turbulent intensity have been calculated for two distinct Reynolds number (Re = 815 & 3500). PIV results are compared with CFD results which show significant agreement with each other.

Wind Farm Optimization Using Evolutionary Algorithms, Carlos Marco Ituarte-Villarreal

Open Access Theses & Dissertations

In recent years, the wind power industry has focused its efforts on solving the Wind Farm Layout Optimization (WFLO) problem. Wind resource assessment is a pivotal step in optimizing the wind-farm design and siting and, in determining whether a project is economically feasible or not. In the present work, three (3) different optimization methods are proposed for the solution of the WFLO: (i) A modified Viral System Algorithm applied to the optimization of the proper location of the components in a wind-farm to maximize the energy output given a stated wind environment of the site. The optimization problem is formulated …

Japanese Computational Lexicon: A Computational Dictionary Of Japanese Verb Forms, Mayumi Kobayashi

Open Access Theses & Dissertations

This paper presents two main topics: a linguistic analysis of Japanese morphological lexicon focused on verb conjugation and a computational analysis of Japanese verb conjugation in Prolog programming. Prolog is one of the computer programming languages and is used to solve a problem logically with a number of statements called "clauses," which are defining various relationships of the entities. With respect to the linguistic aspect, this paper discusses Japanese verb formation, its conjugation patterns, twelve basic forms of Japanese verbs, and a Japanese morphophonemic process called “音便 (onbin)” by investigating 304 regular verbs and 2 irregular verbs. Among the several …

Gis Approach In Vehicle Route Optimization For Residential Recyclables Collection, Karel Kus

Open Access Theses & Dissertations

This Thesis focuses on evaluation of utilization of Geographic Information Systems (GIS) for solving the residential recyclables collection routing problems.

Recyclables collection is considered as a part of reverse logistics to which a specific routing problem is connected. Rise of recycling rate in recent years, and always high transportation costs are the main drivers for looking for the new methods how to optimize routing in residential recyclables collection. Geospatial relation of data by Geographic Information Systems (GIS) software can be used to design and analyze the routing strategy. In this Thesis ArcGIS and its Network Analyst extension is used to …

Transition Metal Carbide (Tmc) Novel Materials For Novel Catalytic Applications, Svetlana Lagoykina

Open Access Theses & Dissertations

Transition metal carbides (TMC) constitute a diverse class of materials and traditionally have many technological applications. TMC became a subject of extensive research since 1973, when their platinum -like properties were discovered. They demonstrated high catalytical activity and selectivity in a variety of chemical reaction and have potential for some novel catalytic application.

This research is an effort to design new high effective, selective and stable bimetal or alkali promoted TMC catalyst. After extensive theoretical research a wide range of TMC, including bimetal and alkali promoted carbides, were synthesized by different methods. All solids were characterized by XRD and microscopy. …

Thermal Shock Studies On Carbon-Carbon Composites: Experimentation And Analysis, Alma Lucia Leanos

Open Access Theses & Dissertations

The oxidation behavior of C/C composites under thermal shock conditions in air is understood and predicted experimentally and by computational efforts. In Chapter. 1, both compressive properties and oxidation behavior of pristine and thermal shock exposed 2D C/C composite specimens were examined. Pristine test specimens were exposed to thermal shock conditions with temperatures ranging from 400°C to 1000°C in an oxidizing environment, followed by compression tests on pristine and thermal shock exposed specimens to obtain their compressive responses.

Similarly, in Chapter. 2, the influence of thermal shock conditions on both, the extent of carbon materials decomposition and the through-thickness compressive …

One Size Does Not Fit All: Looking Beyond Homeless Housing-First And Housing-Ready Approaches To Enhanced Models Of The U.S.-Mexico Border And New York City, Jacqueline Loweree

Open Access Theses & Dissertations

This study explored two "enhanced" service and housing models for homeless persons in the U.S.-Mexico border and in New York City. From data collected in both regions, this study examined the relationship between homeless recidivism and the provision of services. The results suggest that services alone have minimal impact in reducing homeless recividism. This study also reviews the relationship between homelessness and poverty. To evaluate this interconnection, a socio-historical analysis was presented reviewing the application of poverty theories from the last two centuries, to policy-driven approaches with aims to treat indigence, poverty, inequality and more contemporary homeless issues. Using the …

Health Assessment For Loved Ones: Development And Validation Of A New Instrument To Measure Well-Being In Military Spouses, Christi Luby

Open Access Theses & Dissertations

Since 2001, over 2.7 million US troops have deployed in support of the ongoing conflicts in the Middle East. Combat stress and deployments affect Service members, and consequently affect their spouses/intimate partners. In addition, these spouses often act as the social support system to other spouses experiencing traumatic events, such as death, injury, or illness of their deployed soldier. These indirect exposures to trauma may make spouses vulnerable; yet little research has focused on how the lived experiences of spouses of deployed and returning US Service members have affected their well-being. The purpose of this three-part study was to develop …

Damas Y Caballeros, Guadalupe Mendez

Open Access Theses & Dissertations

Collected Poetry - Manuscript over socio - political and culturally relevant context.

On The Path To Multi-Electron Redox Chemistry With Bimetallic Systems, Nathalie Metta

Open Access Theses & Dissertations

The following study is presented in two sections, in the first, a novel digold (II) complex with semi-bridging chlorides supported by two bulky formamidinates was synthesized for the purpose of studying late-transition metal multi-electron redox chemistry. Electrochemical analysis shows one non-reversible reduction. Although the electrochemistry of this complex is restricted, the compound shows interesting electronic properties. The crystal structure reveals a geometry distortion of the Au2ï?­-Cl2 core. The coupling of an unoccupied orbital and an occupied orbital through a vibrational mode, causes a distortion in the geometry of the molecule lowering the D2h symmetry to C2h. This is an example …

When Can The Primitive Element Be Written As A Sum Of Two Algebraic Elements Adjoined To The Field Of The Rational Numbers, Mohamad Moussa

Open Access Theses & Dissertations

Given a field F and elements \alpha and \beta not in F, then F(\alpha, \beta) is the smallest field containing \alpha,\beta, and F. A simple extension is a field extension which is generated by the adjunction of a single element. The Primitive Element Theorem says that if F is a field of characteristic 0, and \alpha and \beta are algebraic over F, then there is an element \gamma in F(\alpha ,\beta ) such that

F(\alpha ; \beta ) = F(\gamma). When can we say that \gamma=\alpha+\beta? We will introduce some situations where \gamma=\alpha+\beta is true and some when this is …

Re-Specifying The Sacred Values Scale, Adon Lee Neria

Open Access Theses & Dissertations

An object or value becomes sacred when a person feels compelled to protect and admire it. When a person holds a Sacred Value (SV) they are less likely to accept compromises, or "taboo tradeoffs," to that value and will behave less rationally to protect it from perceived slights. Though research on SV has replicated well, there has yet to be a popularized scale measuring it. A previous attempt at developing a multidimensional scale for measuring the degree to which a person holds any value as sacred was made that resulted in a 15-item measure. Though this version demonstrated good predictive …

The Nigerian Economy And The Dutch Disease., Kenechukwu Daryl Nweke

Open Access Theses & Dissertations

Dutch Disease explains the relationship between exploitation of natural resources and the decline in the agricultural and manufacturing sectors. The dependent variable of the model shows the contraction of either the manufacturing or agricultural sector. The theory asserts that increase in revenues from natural resources will de-industrialize a nationâ??s economy by appreciating the real exchange rate, and exports on the booming commodity, which in turn makes the tradable sector less competitive.

The government of Nigeria has neglected the agriculture sector, causing the sector to be less competitive in the trade market. As a result, when economic activities in Nigeria increase …

Keep Your Head Up: Building Life Skills In Youth For Social Reintegration And Success, Olga Lizbeth Ochoa

Open Access Theses & Dissertations

There are multiple factors that contribute to a juvenile's future incarceration when facing difficult environmental circumstances: adjudication (it is like an adult criminal conviction, but generally does not subject the youth to the same direct consequences), community characteristics, the age a young person is discharged, criminal history, and gender. This research is important because it applies social science research in community-based settings to address a social concern, moves beyond theoretical research while contributing to a new orientation of an applied project, and provides a model of university-community partnerships for finding innovative strategies to address issues of social concern for local …

Latina/O High School Students' Standpoint On Environmental Justice In A Border Community: A Phenomenological Study, Cynthia Christina Ontiveros

Open Access Theses & Dissertations

This qualitative research is a transcendental phenomenology seeking to understand Latin@ high school students’ perceptions and standpoints as they participated lessons that addressed border environmental justice issues in an underrepresented, marginalized community. Seven students from Borderland High School, enrolled in a senior level course, Environmental Science, participated in the study which focused on their experiences in an environmental justice air quality thematic unit built around the complex issues surrounding a local refinery, American Smelting and Refining Company (ASARCO). The study analyzed the meaning students made and their standpoints regarding the impact of the factory and its one-hundred year history polluting …

Receiver Function Analysis To Study Crustal Structure Of The Northern Nepal And Tibetan Plateau, Mohan Pant

Open Access Theses & Dissertations

The teleseismic P-waveform receiver function analysis is a commonly used technique in earthquake seismology to study the crustal structure beneath a broadband seismic station. To understand the structure of the Northern Nepal and Tibetan plateau different studies have used the receiver function method to estimate the Moho depth and Vp/Vs ratio. The value suggested was ~ 30 km in the south and the ~ 75 km in the north. Other studies have used teleseismic body wave data to perform the travel time residuals to model the lithosphere structure. In our study, we analyzed data from 261 seismic stations to establish …

Rare Pride Campaigns: Evaluating Participatory Communication In Conservation Efforts Throughout Indonesia, Lauren Elizabeth Perez

Open Access Theses & Dissertations

Communication scholars who study international development and social change have found that if facilitators of social change hope to find positive, lasting solutions to complex social and environmental issues, they must incorporate more participatory approaches. However, even the practitioners with the most noble intentions oftentimes fall short of facilitating truly participatory practices because their strategies are the product of linear processes for evaluating the change context. In this study, I apply Lennie and Tacchi's (2014) approach to evaluating communication for development in a case study of Pride Campaigns implemented by managers throughout Indonesia who partnered with the conservation non-governmental organization …

Ac-Susceptibility And Epr Investigations Of Superspin Dynamics In Magnetite Nanoparticles, Alex D. Price

Open Access Theses & Dissertations

In this investigation we use two complementary techniques to distinguish between superparamagnetic blocking (SPB) and superspin-glass (SSG) freezing phenomena in magnetite nanoparticles. While these manifestations of the superspin dynamics are fundamentally different, they have similar "signatures", especially in dc-magnetization experiments. Even if ac-susceptibility measurements are employed, careful use of mathematical models to analyze the data are needed to uncover which type of phenomena (SPB or SSG freezing) occurs within the material. Yet, by utilizing electron paramagnetic resonance (EPR) on a 10 nm Fe3O4 nano-powder as well as on a ferrofluid (based on the same nanoparticle ensemble) we found a very …

Fluid Flow Characterization Of High Turbulent Intensity Compressible Flow Using Particle Image Velocimetry, Marco Efrain Quiroz

Open Access Theses & Dissertations

A high turbulent intensity combustion chamber has been designed in order to operate with compressible (0.3 < M < 0.5) and preheated (T=500K) air-methane combustion. These conditions will allow the investigation of different flame regimes; most notably the proposed "Thickened Flame" regime. Initial design and flow validation has been completed in order to begin further experimentation. A 10 kHz Time Resolved Particle Image Velocimetry (TR-PIV) system and a 3 kHz Planer Laser Induced Fluorescence (PLIF) system have been integrated with the system in order to diagnose the flow field and the flame respectively. The exhaust and chamber cooling subsystems were designed to comply with safety regulations, and the control systems were set up in a way that allows automated (LabVIEW) and user controlled sequencing. This work's main purpose is to characterize and map the flow properties at maximum flow conditions (M > 0.3) in order to map the following; flow structures, kinetic energy at different length scales, velocity fluctuations and turbulent intensity. PIV measurements are carried out for three different volumetric flow rates (ð???Ì? = 25 scfm, 55 scfm, and 115 scfm) and three different grid geometries for each (BR= 67%, 61%, and 54%). Upon finding that the main flow structure consisted of jets caused by the grid at higher flowrates, experiments were done with a grid BR = 67% which was thinner (50% of original …

Studying Cellular And Molecular Interaction With Two-Photon Fluorescence Microscopy, Arifur Rahaman

Open Access Theses & Dissertations

Advances in microscopy and fluorescent probes provide new insight into studying cellular and molecular interactions. Two-photon fluorescence microscopy is one of the most important recent inventions in cellular and molecular study. This technology enables noninvasive study at cellular and molecular levels in three dimensions with submicrometer resolution. Two-photon excitation of fluorophores results from the simultaneous absorption of two photons. This excitation process has a number of unique advantages, such as reduced specimen photodamage and enhanced penetration depth. In this study, we used our two-photon microscope to observe predatorial behavior of fast moving bacterivorous marine organism Cafeteria roenbergensis and quantify Mycobacterium …

The Rock And The Hard Place: How The Prison Psychotherapist Balances Treatment Needs With Security Needs, Elijah Paige Ricks

Open Access Theses & Dissertations

Research on traditional psychotherapy suggests that the quality of the relationship between the therapist and client is the most important element of effective mental health work. In contrast, prison policies often require that staff maintain an emotional distance from offenders, and many elements of the prison environment and characteristics of the offenders may be counterproductive to the therapeutic relationship. Due to the competing demands of psychotherapy and prisons, it is important to understand how prison psychotherapists reconcile the aims of both in their work. This Dissertation examined the psychometric properties of a new measure of how prison therapists balance the …

Process Monitoring In Additive Manufacturing Aimed Toward Part Qualification, Shakerur Ridwan

Open Access Theses & Dissertations

Additive Manufacturing (AM), or layer-by-layer part fabrication, has played a tremendous role in the maker culture by allowing ideas to be materialized with limited resources or knowledge in manufacturing. Various cutting edge AM technologies exist today that are used to create end-use parts; however, these technologies are still new and the processes have not gone through the rigorous evaluation process that traditional manufacturing (i.e. milling, stamping, casting) methods have been through. As a result, several important questions arise when looking to adapt AM technology, including control of the manufacturing process, effect of manufacturing process on part properties, level of variance …

Processing Of Language Switches In Bilingual Individuals With Aphasia: An Event-Related Potential Comparison, Lizette Rodarte

Open Access Theses & Dissertations

Switching between languages, or code-switching, is a common phenomenon in bilingual individuals. In proficient bilinguals, these switches are done with ease and are used for many purposes. Contrary to popular belief, these switches are rule-governed and follow grammatical structure. Bilingual individuals diagnosed with aphasia present with difficulty processing languages and these language switches. With the increase in bilingual individuals, it is likely that the speech-language pathology community will see an increase of bilingual individuals with aphasia on their caseload. For this reason, the purpose of this study is to increase our understanding of the neural processes involved in processing of …