Digital Commons Network^™

Resaka Kolontsaina Le Raha (It Is About Cultures): Cultures And Foreign Language Teaching In Madagascar, Iarintsambatra Rijasoa Andriamanana Josoa

Language, Literacy, and Sociocultural Studies ETDs

For years, teaching and learning a foreign language (FL) has been equated to exclusively discover and master that target language and its related cultures. There has not been any exploration of other features such as the native language and local cultures in a foreign language classroom. Using a participatory action research, the aim of this study was to tell the story of six Malagasy high school teachers collaborating in a Teacher Learning Community (TLC) to construct and put into practice pedagogical approaches that celebrate and sustain Malagasy students’ identities, cultures, and experiences through classroom activities, and capitalize them for basis …

Development Of Ni-Catalyzed Alkene Dicarbofunctionalization Reactions, Shekhar Kc

Chemistry and Chemical Biology ETDs

Alkenes serve as one of the most important feedstocks for organic synthesis, having two vicinal sites for bond formation. In alkenes, both vicinal sites can be functionalized with two reagents in a process commonly known as alkene difunctionalization, which results in the formation of two new bonds. A number of alkenes difunctionalization reactions, such as diamination, dioxygenation, carboamination and carbooxygenation, are known. However, difunctionalization of alkenes with two carbon-based entities, termed alkene dicarbofunctionalization, is relatively less common. Development of such a process could provide a powerful method to introduce two different carbon fragments across an alkene in a regioselective manner, …

Post-Polymerization Modification Of Kapton Using Electron Beam Irradiation, Luis A. Hernandez

Mechanical Engineering ETDs

In the present study, the feasibility of chemical modification of electron-irradiated Kapton is investigated. Characterization techniques determined the changes between a pristine, electron irradiated, and a chemically treated, i.e., fluorinated, sample of Kapton. Kapton is a common material in space application as it serves as the exterior surface for space vehicles. Highly aged Kapton have significant material property changes, making them prone to electro-static discharge (ESD) damage. Understanding how Kapton material behaves under space conditions and the possibility of improving its structure and properties is of utmost important. To this end, changes to the physical properties of the material were …

Searching For Supermassive Binary Black Holes And Their Gravitational Waves, Karishma Bansal

Physics & Astronomy ETDs

The recent discovery of gravitational waves (GWs) by the LIGO collaboration has opened a new observing window on the universe, but it is limited to the GWs in the frequency range of 10-1000 Hz. The main motivation of this thesis is to consider the possibility of detecting low frequency (nHz) GWs. In the pursuit of these waves, we need to understand their source of origin and build a detector with the required sensitivity. Low-frequency waves are expected as a result of coalescing binary supermassive black holes (SMBBHs). We hope to detect these waves in the near future using pulsar timing …

Studying The Properties Of Sf6 Gas Mixtures For Directional Dark Matter Detection, Randy J. Lafler

Physics & Astronomy ETDs

Although dark matter comprises approximately 85\% of the matter content of the universe, direct detection of dark matter remains elusive. As the available parameter space for dark matter candidates is pushed to lower and lower limits, the demand for larger, more sensitive detectors continues to grow. Although upscaling the detector improves the sensitivity, it greatly increases the cost and complexity of the experiment. Even after a dark matter signal is detected, there remains the possibility that an unknown background mimics the dark matter signal. Consequently, verifying the dark matter origin of a detection signal is an issue for any dark …

Architecture And Evolution Of The Peace Vallis Distributive Fluvial System, Gale Crater, Mars, Zachary E. Gallegos

Earth and Planetary Sciences ETDs

The Peace Vallis alluvial fan, located within Gale crater on the planet Mars, is a distributive fluvial system indicating a wet climate in Mars’ past. The Mars Science Laboratory rover instrument ChemCam, with the high-resolution Remote Micro-imager, was utilized to remotely explore the Peace Vallis alluvial fan and surrounding areas area. The Peace Vallis imaging campaigns 1 and 2, led by Dr. Horton Newsom and Zachary Gallegos respectively, acquired 20 distinct rover observations with a total of 243 individual images to investigate the fan. Using visual interpretation of the images and GIS techniques, this study interprets the processes and products …

Application Of Cation Exchange And Nanofiltration To Treat Flue Gas Desulfurization Wastewater, Ayush R. Shahi

Civil Engineering ETDs

Flue gas emitted from coal-fired power plants is one of the major sources of sulfur and nitrogen oxides emissions to the atmosphere in the world today. Although coal use has decreased, it is still a major contributor to such emissions. The Clean Air Act in the United States established regulations for coal-fired power plants to limit SO_x and NO_x emissions into the atmosphere. To meet regulatory requirements, power plants have been using scrubbers to limit their air emissions. Flue-gas desulfurization (FGD) is a pollution prevention method that is employed to limit sulfur dioxide emissions directly in the environment …

Sex, Labor, And Digital Spaces: A Critical Discourse Analysis Of Gpguiadelas, A Brazilian Sex Worker Twitter Feed, Ailesha L. Ringer

Communication ETDs

This dissertation project is a critical discourse analysis of written and visual texts produced for GPGuiaDelas, a Brazilian sex worker Twitter feed. Drawing on digital labor studies, feminist studies on sex work, and Brazilian studies on race and gender, 176 Twitter conversations between sex workers and clients were analyzed in order to answer the following: (1) What are the dominant themes in the discourse about sex work constructed through microblogging on social media?; (2) What are the discursive practices of sex workers who use social media as a platform?; and (3) What theoretical insights emerge from the analysis of sex …

Jack D. Forbes And The Search For A Decolonizing Philosophy Of Education, Joshua T. Frank

Language, Literacy, and Sociocultural Studies ETDs

This study seeks to explicate and advance contemporary deimperial and decolonial philosophies of education through a reflexive archival inquiry and comparative textual analysis of the corpus of California Indian educational leader (Renape/Lenape) Jack Douglas Forbes (Jan. 7, 1934-Feb. 23, 2011). This study looks across Forbes lifetime at the development of his conception of education and peoplehood-nationhood, his critique of imperialism and colonialism, and finally his development and advocacy for decolonizing-deimperializing forms of education. I will describe his growth as an Indigenous scholar-warrior reading and writing across diverse types of data sources, or as I name all throughout this study as …

Three Essays On The Societal Impact Of Health Policies And Laws, Xuanhao He

Economics ETDs

This dissertation provides evidence to the two contentious debate over health policies and laws in the US, Medicaid expansion and sex offender registration and notification. In Chapter 2, I explore one key determinant of Medicaid take-up, the benefit of access to care proxied by the Medicaid-to-Medicare primary care physician payment ratio. Using a unique dataset of Medicaid physician reimbursement rates and the American Community Survey of 2010 – 14, I find that a 10-percentage-point increase in the payment ratio of a 30-minute new patient office visit will increase Medicaid enrollment among uninsured adults in poverty by more than 150,000. In …

Forty Years Of Change In Southwestern Bee Assemblages, Catherine Cumberland

Biology ETDs

Changes in a regional bee assemblage were investigated by repeating a 1970s study from the U.S. Southwest of bees visiting native sunflower (Helianthus annuus). Results showed declines in abundance and species richness of native bees and increases in non-native Apis mellifera. Climate data indicate drought increased over the 40-year period, favoring introduced and generalist species. Experimental placement of A. mellifera in an area of low A. mellifera density in New Mexico reduced native bee visitation, but improved reproduction in H. annuus plants. Meta-analytic models comparing pollination effectiveness in specialist versus generalist, native versus non-native, and native pollinators …

Ecological And Morphological Response Of Rodents To Environmental Change Over The Late Quaternary, Catalina Tomé

Biology ETDs

The rapid progression of modern climate change is already altering ecosystems worldwide. By employing the fossil record, we can investigate how animals responded to past climatic changes and biodiversity loss. The paleontological record of the late Quaternary (past ~22000 years) encompasses a period of considerable environmental change in North America. Rising temperatures and climatic fluctuations are coupled with the extinction of the majority of large bodied mammals on the landscape. The combination of climate and extinction events led to changes in vegetation and community structure which likely affected the resources available and interactions between the remaining mammals within communities. Here, …

Cartographies Of Precarity: The Cultural Politics Of Filipina And Mexican Migrant Domestic Workers, Maria Eugenia López-García

American Studies ETDs

This dissertation examines the cultural politics of migrant domestic work in the 2000s within popular culture, mass media, contemporary art, and grassroots national organizing. While scholars and activists have identified that migrant domestic workers are the hidden backbone of the U.S. economy, dominant cultural and social narratives reinforce the racialized and gendered logics of capitalism that work to devalue domestic work as informal, disposable and precarious. It was not until after the struggle of domestic workers achieved recognition through the ratification of the International Labor Office of Convention 189 in July 2011 that this labor sector gained more intense media …

The History Of Admixture In African Americans, Jessica Marie Gross

Anthropology ETDs

African American admixture has been a focal topic of genetic studies since the mid-20^thcentury. Generally, these studies estimate individual- and population-level African and European ancestry proportions. Some of these studies fit unrealistic admixture models to the patterns of genetic diversity in African Americans to determine both the onset time of admixture between Africans and Europeans, and the per-generation contribution of Europeans.

This research has failed to consider the contribution of the millions of Africans who migrated, either forcibly or by choice, to North America during and after slave importation, and failed to consider how changing social dynamics have …

Experimental Investigation Of Steady-State And Transient Flow Boiling Critical Heat Flux, Soon Kyu Lee

Nuclear Engineering ETDs

The Critical Heat Flux (CHF) causes a rapid reduction of heat transfer coefficient with a rapid increase of cladding temperature, which may induce physical failure of the heated material. Understanding CHF phenomena and reliable prediction of the boiling behavior are needed to design a heat transfer system including nuclear reactors. Due to the complex nature of CHF, it is still an active research topic of interest. With an increasing interest in Accident Tolerant Fuel (ATF), CHF of ATF is essential topic of study for the detailed design of the fuel – cladding element and for the reactor safety analysis.

In …

School And Community Expectations In A Small, Rural, Northern New Mexico School, Mónica J. Martínez-Archuleta

Teacher Education, Educational Leadership & Policy ETDs

School leaders find themselves in constant reflection of their academic ranking in a time of national reform. With the No Child Left Behind Act and Every Student Succeeds Act, expectations around school and student performance are created to compare against national standards. Rural communities have undergone significant social and economic changes due to the decline of family farms, accompanied by people leaving and closing of businesses all which have dramatic effects on rural schools (Petrin, et. al. 2014). With increased attention on academic achievement at the state and federal level, it is imperative that we understand how rural schools address …

Natural Salinization Of The Jemez River, New Mexico: An Insight From Trace Element Geochemistry, Jon K. Golla

Earth and Planetary Sciences ETDs

The Jemez River, a tributary of the Rio Grande in north-central New Mexico, receives thermal water input from the geofluids of the Valles Caldera, an active, high-temperature, liquid-dominated geothermal system. We focus on a ∼50-km portion of the northern Jemez River. This research extends previous decadal work (Crossey et al., in prep., 2013) on major chemistry in the river by characterizing the response of 16 trace elements to geochemical contributions from geothermal waters (McCauley, Spence, Soda Dam, and Jemez Springs springs and San Ysidro mineral waters), an area with copious hydrothermal degassing (Hummingbird), and two major tributaries (Rio San Antonio …

Design And Fabrication Of Peel-Off And Stick Antennas, Jayakrishnan Vijayamohanan

Electrical and Computer Engineering ETDs

Antennas on multiple platforms with the capability to be reused is a novel concept in antenna technologies. This thesis explores the idea of such a flexible antenna that can be stuck on any surface using certain adhesives and be peeled off for reuse for a different purpose. This thesis specifically focuses on the application of being used on small Unmanned Aircraft Systems (sUAVs). Three basic designs are fabricated and investigated. One of them is a reconfigurable meandering monopole, consisting of a PIN diode which resonates at two different frequencies depending on the applied external voltage. A challenge that is addressed …

The Chaotic Domestic: Tracing Affect In Representations Of Nation, Class, And Gender In Eighteenth-Century Laboring-Class Women’S Writing, Kelly J. Hunnings

English Language and Literature ETDs

My dissertation traces a term I call the “chaotic domestic” in the writing of a collection of eighteenth-century women laboring-class writers: Mary Barber, Mary Collier, Mary Leapor, Ann Yearsley, and Janet Little. The chaotic domestic in the hands of these writers is multi-layered and affect-driven, focusing as they do on issues regarding nation, class, and gender. As both a poetic trope and the seeming natural and dynamic state of the domestic sphere, the image of the domestic that this set of writers represents and defines is turbulent, unruly, and one that deals with the tangled web of local and global, …

Resisting The Victimization: Examining Ideological Tensions Of Race, Gender, Sexuality And Transnationality Among First-Generation Chinese Migrant Women In U.S. Academia, Zhao Ding

Communication ETDs

This dissertation explored the daily experiences of first-generation Chinese migrant women who study and/or work in universities and colleges in the United States of America. Drawing on previous scholarship on whiteness studies and Asian American gender and sexuality studies with femiqueer perspectives, the primary goal of this study was to gain a better understanding of these Chinese migrant women’s daily experiences and negotiations with power relations concerning race, gender, and sexuality, and to challenge the dominant perceptions and constructions of Chinese/Asian women. By analyzing their narratives of everyday experiences, I found that white heteronormative patriarchal ideologies have been globally promoted, …

The Importance Of The Instantaneous Phase In Detecting Faces With Convolutional Neural Networks, Luis Armando Sanchez Tapia

Electrical and Computer Engineering ETDs

Convolutional Neural Networks (CNN) have provided new and accurate methods for processing digital images and videos. Yet, training CNNs is extremely demanding in terms of computational resources. Also, for simple applications, the standard use of transfer learning also tends to require far more resources than what may be needed. Furthermore, the final systems tend to operate as black boxes that are difficult to interpret.

The current thesis considers the problem of detecting faces from the AOLME video dataset. The AOLME dataset consists of a large video collection of group interactions that are recorded in unconstrained classroom environments. For the thesis, …

A Deep Learning Approach To Uncertainty Quantification, Mst Afroja Akter

Mathematics & Statistics ETDs

In this thesis we consider ordinary differential equations (ODEs) with random parameters. We focus on Monte Carlo (MC) sampling for computing the statistics of some quantities of interest (QoIs) given by the solution of the ODE problems. We use the 4th order accurate Runge-Kutta (RK4) method as the deterministic ODE solver. We then develop a hybrid MC sampling method that combines RK4 with neural network models to efficiently compute the statistics of QoIs within a desired accuracy. We present several numerical examples to verify the accuracy and efficiency of the proposed hybrid method compared to classical MC sampling. The hybrid …

An Estimation Of Lower Tropospheric Mixing Derived From Inverse Modeling Of Boundary Layer Water Vapor Isotopologues On Graciosa Island, Azores, Jacquelyn M. Delp

Earth and Planetary Sciences ETDs

Recent studies have shown water vapor isotopologues to be sensitive tracers of mixing processes that govern low-cloud feedback in climate models. In this study, we develop an inverse model (MBL Mix inverse model) that uses one year of isotope and humidity observations from Graciosa Island, Azores to estimate mixing for four seasons. We show the dry end-member of the model, the lower free troposphere (LFT), can be represented using Rayleigh fractionation. Isotope observations from Graciosa Island are compared to other field locations to discuss controls on isotopic variability other than mixing. Output from the MBL Mix inverse model shows the …

Facial Fluctuating Asymmetry: Developmental Origins And Implications For Long-Term Health, Katelyn Marie Rusk Phd

Anthropology ETDs

Fluctuating asymmetry (FA), characterized by random left-right deviations from perfect symmetry in anatomical structures, is a form of bilateral asymmetry that is thought to reflect underlying developmental instability (DI). DI refers to an organism’s relative ability to buffer against stochastic fluctuations in environmental conditions throughout development. FA is commonly used within evolutionary biology and anthropology as a cumulative indicator of chronic stress exposure during development and its consequences for long-term health. While the FA literature is extensive, there are two primary areas of inquiry that remain incomplete: assessing the full breadth of health correlates of FA across the human life …

Cyclic Amp Efflux Inhibition As A Potential Therapeutic Target For Acute Leukemia: Small Molecule Discovery And Validation, Dominique R. Perez

Biomedical Sciences ETDs

Evasion of apoptosis and resistance to chemotherapy are major therapeutic challenges for acute leukemias. Presumably as a means to promote cell survival, multiple elements of the cyclic AMP (cAMP) pathway are aberrantly regulated in acute leukemias. Furthermore, increased intracellular cAMP (icAMP) is known to induce apoptosis. Therefore, modulation of icAMP has long been a target in leukemias. The central hypothesis of this dissertation is that malignant cells produce and remove excess intracellular cAMP to evade apoptosis and promote survival. Consequently, inhibition of cAMP efflux could selectively trigger leukemia cell death. We designed a novel assay to assess icAMP efflux from …

Computational Investigation Of The Interactions Between Bioactive Compounds And Biological Assemblies, Tye D. Martin

Biomedical Engineering ETDs

Small, biologically active molecules with unique properties and applications are potential solutions to a wide range of threats to global health including infectious agents and neurodegenerative disease. Experimental studies on a class of oligomeric p-phenylene ethynylenes (OPEs) have shown potential both as bioactive antimicrobials and fluorescent sensing agents for tracking amyloid-β (Aβ) aggregates found in Alzheimer’s Disease (AD). A second type of small molecule with potential applications in AD therapy, curcumin, has been found to interfere with Aβ fibril growth. Curcumin also attenuates Aβ-membrane interactions and Aβ toxicity. Our goal has been to use computational techniques to better understand the …

Exercise-Based Cardiac Rehabilitation Improves Cognitive Function Among Cvd Patients, Terence A. Moriarty, Kelsey Bourbeau, Christine Mermier, Len Kravitz, Ann Gibson, Nicholas Beltz, Omar Negrete, Micah Zuhl

Health, Exercise, and Sports Sciences ETDs

Objective: Investigate the effects of cardiac rehabilitation (CR) exercise training on cognitive performance and if the changes are associated with alterations in prefrontal cortex (PFC) oxygenation among patients with cardiovascular disease (CVD). Design: A single group pre-post design. Setting: An outpatient CR program. Subjects: Twenty (15 male, 5 female; mean (SD) age 64.8 (11.6) yrs) patients from an outpatient CR program. Intervention: At least 18 individualized CR sessions (approximately 6 weeks). Main measures: Pre- and post-CR changes in cognitive performance (a measure of 5 constructs from the NIH Fluid Cognition test battery), left-PFC and right-PFC activation (measured using functional …

Racial Identity Among Latino Millennials: A Determining Factor For Political Behavior, Yoshira Macias Mejia

Political Science ETDs

This dissertation explores the political behavior of Latino millennials when compared to non-Latino millennials and Latino non-millennials. While most studies paint millennials as a monolithic generational cohort, this dissertation asks the following questions: Are Latino millennials distinct in their political behavior from millennials of other racial and ethnic groups? Do Latino millennials vary in their group identity from older Latinos, if yes does this create different patterns in their political participation when compared to other racial and ethnic millennials? The results show that linked fate varies among millennials and that Latino millennials identities are distinct from non-Latino millennials. Additionally, linked …

Clever Cleric: Saint Wilfrid Of York And The Complexities Of Power And Authority In Seventh-Century England, Olivia E. Gannon

History ETDs

Saint Wilfrid of York was a Northumbrian bishop, abbot, and missionary. He was born in 634 and died in 709/710. His life was characterized by his landholdings that spanned territories and kingdoms, his enduring persistence to remain bishop, his monastic empire, his hostile relationships with kings, his powerful friends and supporters, and his resistance in the face of adversity. Wilfrid’s achievements were remarkable for a seventh-century bishop – a bishop deserving of recognition for his lasting impact on England. By closely examining the sources, this thesis analyzes Wilfrid’s tumultuous life and career in the form of his landholdings, his trips …

Beach Bodies: Gender And The Beach In American Culture, 1880-1940, Margaret Elena Depond

History ETDs

This dissertation argues that American beaches, within the world of leisure and pleasure, were significant contested spaces of social change and debate. Overtime, from about 1880 to 1940, social restrictions loosened at the beach, allowing men, women, and people of color to express themselves in ways that had been previously controlled, curtailed, or proscribed. The emergence of mass popular amusements at the beach attracted a wide array of the American population. Both working-class and middle-class Americans absorbed the culture of new beach attractions, such as amusement parks, piers, boardwalks, and bathhouses. In doing so, they interacted more with each other …