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ASU Electronic Theses and Dissertations


This collection includes most of the ASU Theses and Dissertations from 2011 to present. ASU Theses and Dissertations are available in downloadable PDF format; however, a small percentage of items are under embargo. Information about the dissertations/theses includes degree information, committee members, an abstract, supporting data or media.

In addition to the electronic theses found in the ASU Digital Repository, ASU Theses and Dissertations can be found in the ASU Library Catalog.

Dissertations and Theses granted by Arizona State University are archived and made available through a joint effort of the ASU Graduate College and the ASU Libraries. For more information or questions about this collection contact or visit the Digital Repository ETD Library Guide or contact the ASU Graduate College at gradformat@asu.edu.


Status
  • Public
Date Range
2010 2019


A continuously and stably stratified fluid contained in a square cavity subjected to harmonic body forcing is studied numerically by solving the Navier-Stokes equations under the Boussinesq approximation. Complex dynamics are observed near the onset of instability of the basic state, which is a flow configuration that is always an exact analytical solution of the governing equations. The instability of the basic state to perturbations is first studied with linear stability analysis (Floquet analysis), revealing a multitude of intersecting synchronous and subharmonic resonance tongues in parameter space. A modal reduction method for determining the locus of basic state instability is …

Contributors
Yalim, Jason, Welfert, Bruno D., Lopez, Juan M., et al.
Created Date
2019

The goal of this paper was to do an analysis of two-dimensional unsplit mass and momentum conserving Finite Volume Methods for Advection for Volume of Fluid Fields with interfaces and validating their rates of convergence. Specifically three unsplit transport methods and one split transport method were amalgamated individually with four Piece-wise Linear Reconstruction Schemes (PLIC) i.e. Unsplit Eulerian Advection (UEA) by Owkes and Desjardins (2014), Unsplit Lagrangian Advection (ULA) by Yang et al. (2010), Split Lagrangian Advection (SLA) by Scardovelli and Zaleski (2003) and Unsplit Averaged Eulerian-Lagrangian Advection (UAELA) with two Finite Difference Methods by Parker and Youngs (1992) and …

Contributors
Ansari, Adil, Herrmann, Marcus, Peet, Yulia, et al.
Created Date
2019

There is an ongoing debate around the extent that anthropogenic processes influence both plant species distribution dynamics and plant biodiversity patterns. Past human food use may leave a strong legacy on not only the extent that food plants are dispersed and fill their potential geographic ranges, but also on food plant species richness in areas that have been densely populated by humans through time. The persistent legacy of plant domestication on contemporary species composition has been suggested to be significant in some regions. However, little is known about the effects that past human food use has had on the biogeography …

Contributors
Flower, Carolyn, Blonder, Benjamin, Hodgson, Wendy, et al.
Created Date
2019

The purpose of this project was to provide a pedagogical resource for students and teachers that highlights selected transcriptions of former Los Angeles Philharmonic principal trombonist Ralph Sauer (b. 1944), and how those works can be used in an applied instruction setting. The compositions include Bartók’s Romanian Folk Dances, Debussy’s Syrinx, Pergolesi’s Sinfonia in F, Sonata in B-flat by Mozart, and Saint-Saëns The Nightingale. The sections dealing with pedagogical concepts are presented as conversationally as possible to facilitate ease of understanding by teachers of any background and level. Educators who are not trombonists or are otherwise not wholly familiar with …

Contributors
Bledsoe, Joshua L, Humphreys, Jere T, Rogers, Rodney, et al.
Created Date
2019

This comprehensive library of photovoltaic functions (PVSimLib) is an attempt to help the photovoltaics community to solve one of its long-lasting problems, the lack of a simple, flexible and comprehensive tool that can be used for photovoltaic calculations. The library contains a collection of useful functions and detailed examples that will show the user how to take advantage of the resources present in this library. The results will show how in combination with other Python libraries (Matplotlib), this library becomes a powerful tool for anyone involved in solar power. Dissertation/Thesis Python library source code

Contributors
Reguera, Pedro, Honsberg, Christiana, King, Richard, et al.
Created Date
2018

The objective of this study is to understand how to integrate conical spike external compression inlets with high bypass turbofan engines for application on future supersonic airliners. Many performance problems arise when inlets are matched with engines as inlets come with a plethora of limitations and losses that greatly affect an engine’s ability to operate. These limitations and losses include drag due to inlet spillage, bleed ducts, and bypass doors, as well as the maximum and minimum values of mass flow ratio at each Mach number that define when an engine can no longer function. A collection of tools was …

Contributors
Cleary, Spencer, Takahashi, Timothy, White, Daniel, et al.
Created Date
2018

Myocardial infarction (MI) remains the leading cause of mortality and morbidity in the U.S., accounting for nearly 140,000 deaths per year. Heart transplantation and implantation of mechanical assist devices are the options of last resort for intractable heart failure, but these are limited by lack of organ donors and potential surgical complications. In this regard, there is an urgent need for developing new effective therapeutic strategies to induce regeneration and restore the loss contractility of infarcted myocardium. Over the past decades, regenerative medicine has emerged as a promising strategy to develop scaffold-free cell therapies and scaffold-based cardiac patches as potential …

Contributors
Navaei, Ali, Nikkhah, Mehdi, Brafman, David, et al.
Created Date
2018

Remote sensing in visible to near-infrared wavelengths is an important tool for identifying and understanding compositional differences on planetary surfaces. Electronic transitions produce broad absorption bands that are often due to the presence of iron cations in crystalline mineral structures or amorphous phases. Mars’ iron-rich and variably oxidized surface provides an ideal environment for detecting spectral variations that can be related to differences in surface dust cover or the composition of the underlying bedrock. Several imaging cameras sent to Mars include the capability to selectively filter incoming light to discriminate between surface materials. At the coarse spatial resolution provided by …

Contributors
Wellington, Danika, Bell III, James F, Christensen, Philip R, et al.
Created Date
2018

Data from a total of 282 online web applications was collected, and accounts for 230 of those web applications were created in order to gather data about authentication practices, multistep authentication practices, security question practices, fallback authentication practices, and other security practices for online accounts. The account creation and data collection was done between June 2016 and April 2017. The password strengths for online accounts were analyzed and password strength data was compared to existing data. Security questions used by online accounts were evaluated for security and usability, and fallback authentication practices were assessed based on their adherence to best …

Contributors
Gutierrez, Garrett, Bazzi, Rida, Ahn, Gail-Joon, et al.
Created Date
2017

Alzheimer’s disease (AD), is a chronic neurodegenerative disease that usually starts slowly and gets worse over time. It is the cause of 60% to 70% of cases of dementia. There is growing interest in identifying brain image biomarkers that help evaluate AD risk pre-symptomatically. High-dimensional non-linear pattern classification methods have been applied to structural magnetic resonance images (MRI’s) and used to discriminate between clinical groups in Alzheimers progression. Using Fluorodeoxyglucose (FDG) positron emission tomography (PET) as the pre- ferred imaging modality, this thesis develops two independent machine learning based patch analysis methods and uses them to perform six binary classification …

Contributors
Srivastava, Anant, Wang, Yalin, Bansal, Ajay, et al.
Created Date
2017
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Virtual Reality (hereafter VR) and Mixed Reality (hereafter MR) have opened a new line of applications and possibilities. Amidst a vast network of potential applications, little research has been done to provide real time collaboration capability between users of VR and MR. The idea of this thesis study is to develop and test a real time collaboration system between VR and MR. The system works similar to a Google document where two or more users can see what others are doing i.e. writing, modifying, viewing, etc. Similarly, the system developed during this study will enable users in VR and MR …

Contributors
Seth, Nayan Sateesh, Nelson, Brian, Walker, Erin, et al.
Created Date
2017

This dissertation presents reflective teaching practices that draw from an object-oriented rhetorical framework. In it, practices are offered that prompt teachers and students to account for the interdependent relationships between objects and writers. These practices aid in re-envisioning writing as materially situated and leads to more thoughtful collaborations between writers and objects. Through these practices, students gain a more sophisticated understanding of their own writing processes, teachers gain a more nuanced understanding of the outcomes of their pedagogical choices, and administrators gain a clearer vision of how the classroom itself affects curriculum design and implementation. This argument is pursued in …

Contributors
Hopkins, Steven Wayne, Rose, Shirley K., Goggin, Maureen, et al.
Created Date
2017

This research concentrates on the five sonatinas for piano by Walter Saul. It consists of a recording and a document providing musical analyses and performance guides to these sonatinas. The purpose of the research is to introduce Walter Saul’s five sonatinas, composed from 1998 to 2015. Walter Saul is a gifted living American composer and pianist. He has written a quantity of piano music intended for study by young performers. His five sonatinas, in traditional sonata forms, use a variety of compositional techniques, including twelve-tone rows, jazz elements, modulations, modes, scales, and contrapuntal procedures. Performers may find that the analyses …

Contributors
Yun, Ahyeon, Cosand, Walter, Rogers, Rodney, et al.
Created Date
2017

This dissertation uses a comparative approach to investigate long-term human- environment interrelationships in times of climate change. It uses Geographical Information Systems and ecological models to reconstruct the Magdalenian (~20,000- 14,000 calibrated years ago) environments of the coastal mountainous zone of Cantabria (Northwest Spain) and the interior valleys of the Dordogne (Southwest France) to contextualize the social networks that could have formed during a time of high climate and resource variability. It simulates the formation of such networks in an agent-based model, which documents the processes underlying the formation of archaeological assemblages, and evaluates the potential impacts of climate-topography interactions …

Contributors
Gravel-Miguel, Claudine, Barton, C. Michael, Coudart, Anick, et al.
Created Date
2017

ABSTRACT This dissertation examined how seven federal agencies utilized Twitter during a major natural disaster, Hurricane Sandy. Data collected included tweets between October 26-31, 2012 via TweetTracker, as well as federal social media policy doctrines and elite interviews, to discern patterns in the guidance provided to federal public information officers (PIOs). While scholarly research cites successful local and state government efforts utilizing social media to improve response efforts in a two-way communications interaction, no substantive research addresses social media’s role in crisis response capabilities at the federal level. This study contributes to the literature in three ways: it focuses solely …

Contributors
Smith, Ceeon, Matera, Fran, Godfrey, Donald, et al.
Created Date
2017

Although the Caribbean has been continuously inhabited for the last 7,000 years, European contact in the last 500 years dramatically reshaped the cultural and genetic makeup of island populations. Several recent studies have explored the genetic diversity of Caribbean Latinos and have characterized Native American variation present within their genomes. However, the difficulty of obtaining ancient DNA from pre-contact populations and the underrepresentation of non-Latino Caribbean islanders in current research have prevented a complete understanding of genetic variation over time and space in the Caribbean basin. This dissertation uses two approaches to characterize the role of migration and admixture in …

Contributors
Nieves Colon, Maria Alejandra, Stone, Anne C, Pestle, William J, et al.
Created Date
2017

Obesity and its underlying insulin resistance are caused by environmental and genetic factors. DNA methylation provides a mechanism by which environmental factors can regulate transcriptional activity. The overall goal of the work herein was to (1) identify alterations in DNA methylation in human skeletal muscle with obesity and its underlying insulin resistance, (2) to determine if these changes in methylation can be altered through weight-loss induced by bariatric surgery, and (3) to identify DNA methylation biomarkers in whole blood that can be used as a surrogate for skeletal muscle. Assessment of DNA methylation was performed on human skeletal muscle and …

Contributors
Day, Samantha Elaine, Coletta, Dawn K., Katsanos, Christos, et al.
Created Date
2017

A genetically engineered line of human induced pluripotent stem cells was used to study the effects of gene expression on cell fate. These cells were designed to activate expression of the gene GATA6 when exposed to the small molecule doxycycline. This gene was chosen because it plays an important role in the developmental biology stages of liver formation. Because of the way the cells were engineered, a given population would have a heterogeneous expression of GATA6 because each cell could have a different copy number of the exogenous gene. This variation allows for the differentiation of multiple cell types, and …

Contributors
Carter, Shaylina Rae, Ebrahimkhani, Mohammad R, Kiani, Samira, et al.
Created Date
2017

Tessellation and Screen-Space Ambient Occlusion are algorithms which have been widely-used in real-time rendering in the past decade. They aim to enhance the details of the mesh, cast better shadow effects and improve the quality of the rendered images in real time. WebGL is a web-based graphics library derived from OpenGL ES used for rendering in web applications. It is relatively new and has been rapidly evolving, this has resulted in it supporting a subset of rendering features normally supported by desktop applications. In this thesis, the research is focusing on evaluating Curved PN-Triangles tessellation with Screen Space Ambient Occlusion …

Contributors
Li, Chenyang, Amresh, Ashish, Wang, Yalin, et al.
Created Date
2017

Within the primate lineage, skeletal traits that contribute to inter-specific anatomical variation and enable varied niche occupations and forms of locomotion are often described as the result of environmental adaptations. However, skeletal phenotypes are more accurately defined as complex traits, and environmental, genetic, and epigenetic mechanisms, such as DNA methylation which regulates gene expression, all contribute to these phenotypes. Nevertheless, skeletal complexity in relation to epigenetic variation has not been assessed across the primate order. In order to gain a complete understanding of the evolution of skeletal phenotypes across primates, it is necessary to study skeletal epigenetics in primates. This …

Contributors
Housman, Genevieve, Stone, Anne, Quillen, Ellen, et al.
Created Date
2017