Digital Commons Network^™

How Middle School Students Describe And Explain Their Elementary Science Experiences, Tryna Knox

Teaching and Learning Theses and Dissertations

The purpose of this study was to elicit students' voices to examine elementary science experiences to better understand foundational learning. The grounding philosophy and framework of phenomenology guided this work as I sought to capture the lived elementary science experiences of students. I administered a handwritten science autobiography to 52 middle school students at a private middle school in a suburban southwestern community. Utilizing a hermeneutic analytic approach, I learned that middle school students describe and explain elementary science experiences in many interesting ways. For example, students shared a preference for participating in hands-on, active, or engaged learning experiences over …

Climate-Driven Changes In Water Quality By Physiographic Region: A Case Study Of Taos County, New Mexico, Michaela Eamma

Civil and Environmental Engineering Theses and Dissertations

Socioeconomic growth and stability in rural regions of the United States where agriculture is the dominant industry are highly reliant on access to sufficient surface water supplies. The water quantity crisis experienced worldwide in recent years has introduced questions about how to best maintain the quality of our remaining resources. Ensuring adequate access to drinking and irrigation water mandates that we protect existing surface water sources and anticipate future threats to quality. The impact of climate change on surface water quality is not spatially uniform, introducing the need to study the water-atmosphere-land system comprehensively.

This research aims to study the …

Study Of Radiation Effects In Gan-Based Devices, Han Gao

Electrical Engineering Theses and Dissertations

Radiation tolerance of wide-bandgap Gallium Nitride (GaN) high-electron-mobility transistors (HEMT) has been studied, including X-ray-induced TID effects, heavy-ion-induced single event effects, and neutron-induced single event effects. Threshold voltage shift is observed in X-ray irradiation experiments, which recovers over time, indicating no permanent damage formed inside the device. Heavy-ion radiation effects in GaN HEMTs have been studied as a function of bias voltage, ion LET, radiation flux, and total fluence. A statistically significant amount of heavy-ion-induced gate dielectric degradation was observed, which consisted of hard breakdown and soft breakdown. Specific critical injection level experiments were designed and carried out to explore …

Neural Network Learning For Pdes With Oscillatory Solutions And Causal Operators, Lizuo Liu

Mathematics Theses and Dissertations

In this thesis, we focus on developing neural networks algorithms for scientific computing. First, we proposed a phase shift deep neural network (PhaseDNN), which provides a uniform wideband convergence in approximating high frequency functions and solutions of wave equations. Several linearized learning schemes have been proposed for neural networks solving nonlinear Navier-Stokes equations. We also proposed a causality deep neural network (Causality-DeepONet) to learn the causal response of a physical system. An extension of the Causality-DeepONet to time-dependent PDE systems is also proposed. The PhaseDNN makes use of the fact that common DNNs often achieve convergence in the low frequency …

A Longitudinal Investigation Of Positive Biases And Psychological Functioning During Thecoronavirus Disease 2019 Pandemic, Tricia Gower

Psychology Theses and Dissertations

Since the onset of COVID-19, many individuals have experienced a multitude of pervasive, chronic stressors and diminished psychological functioning. The current study examined whether cognitive biases towards positive social media or autobiographical memories augmented psychological functioning during COVID-19. Participants were 797 adults (Mage = 47.73; 58% female) recruited from CloudResearch/Turk Prime. Participants reported on their positively biased social media consumption and autobiographical recall, positive and negative affect, and dysphoria symptoms. Results indicated racial group differences in relations between positively biased social media consumption and negative affect and dysphoria symptoms and between positively biased autobiographical recall and positive affect. Positively biased …

Trans-Formation: Establishing Interdisciplinary Support For The Transgender Experience Through Historical, Biological, And Religious Lenses, Gaymarie Vaughan

Graduate Liberal Studies Theses and Dissertations

Quite frankly, nothing could be more relevant to a modern discussion about what it means to be human than the emergence of discourse on transgender identity. By looking at the long history of human evolution, the impact that the progressing fields of science and medicine have had on human development, and the human need for bodily autonomy, it should be taken for granted that transgender issues belong in public discourse and that transgender people deserve to enjoy the same rights and freedoms all other humans share. This research advocates for best and most inclusive societal practices for transgender individuals by …

Perspective, Invention, And Metatheater In Renaissance Literature, William Roudabush

English Theses and Dissertations

This dissertation challenges the misconception of post-Reformation England as iconophobic. On the contrary, it argues that early modern English poets and playwrights adapt Continental theories and techniques from painting, translating them into their own poetic and dramatic forms. It explores how allusions to contemporary perspectival images serve as governing metaphors and structural devices for the works in which they appear. Particularly in the genre of the Elizabethan epyllion and in works by Shakespeare, it suggests that texts are designed to be read “perspectively,” to borrow Shakespeare’s coinage, so that they are open to ambiguity and multiplicity, and capable of being …

Polygonal Faults In The Austin Chalk: Invariance Of Scale From Mud Cracks To Polygons With Implications Of Structural, Geomorphic And Isotopic Data On Polygonal Fault Geometry And Origin., Kun Shang

Earth Sciences Theses and Dissertations

The Cretaceous Austin Chalk contains large numbers of fractures and normal faults whose orientations have been attributed to either regional stresses (e.g., the Balcones fault trend) or, by analogy with the mudrocks, to polygonal faulting resulting from compaction. In this study, we present geomorphic data, field study, and stable isotope data to support that the majority of these faults in North Texas are polygonal. Field-measured fault orientations suggest randomly distributed fault strikes, indicating a polygonal fault structure. Using geomorphologic data (topographic and DEM data) on stream orientations suggests that the polygonal fault patterns are best reflected in the headwater (1st …

Effect Of Surface Fluid Entrapment In A Laminar Flat Plate Boundary Layer, Abigail Hays

Mechanical Engineering Research Theses and Dissertations

For streamlined objects in laminar flow, the drag is dominated by friction drag. To counteract this, the boundary condition of the object can be changed to introduce an apparent slip on the surface. A number of approaches have been proposed for introducing surface slip to reduce drag and viscous resistance in fluid flows. This work investigates a novel approach to providing slip via fluid entrapment in a perforated domain embedded in the surface. The fluid entrapment system uses a cavity underneath the domain to allow entrapment of fluid of the same type, or supply air to the surface perforations in …

A Comparison Of Confidence Intervals In State Space Models, Jinyu Du

Statistical Science Theses and Dissertations

This thesis develops general procedures for constructing confidence intervals (CIs) of the error disturbance parameters (standard deviations) and transformations of the error disturbance parameters in time-invariant state space models (ssm). With only a set of observations, estimating individual error disturbance parameters accurately in the presence of other unknown parameters in ssm is a very challenging problem. We attempted to construct four different types of confidence intervals, Wald, likelihood ratio, score, and higher-order asymptotic intervals for both the simple local level model and the general time-invariant state space models (ssm). We show that for a simple local level model, both the …

Optimal Experimental Planning Of Reliability Experiments Based On Coherent Systems, Yang Yu

Statistical Science Theses and Dissertations

In industrial engineering and manufacturing, assessing the reliability of a product or system is an important topic. Life-testing and reliability experiments are commonly used reliability assessment methods to gain sound knowledge about product or system lifetime distributions. Usually, a sample of items of interest is subjected to stresses and environmental conditions that characterize the normal operating conditions. During the life-test, successive times to failure are recorded and lifetime data are collected. Life-testing is useful in many industrial environments, including the automobile, materials, telecommunications, and electronics industries.

There are different kinds of life-testing experiments that can be applied for different purposes. …

Christ Our Passover (Pascha Nostrum), Anthony Elia

Bridwell Library Research

Work was originally written for the Congregation of the Episcopal Church of the Redeemer (Irving, TX) in 2021, but not completed till 2023. Given in honor of Canon Victoria Heard's Distinguished Service and Retirement in Spring 2023. (9 pages). [Based off of texts from 1 Corinthians and Romans].

Essays On Political Economy And Behavior, Seth Emblem

Economics Theses and Dissertations

This dissertation consists of three essays which focus on the intersection of political economy and behavioral economics. I am interested in understanding how people behave in politically adjacent areas so that we can find the policy interventions that can best address the issues that arise from these areas. To do so, I utilize incentivized survey instruments and laboratory experiments to study how people behave in these settings. In Chapter 1, I examine the question of how people respond to standard political surveys and whether these surveys reflect people’s genuine beliefs regarding factual political questions. Responses to standard political surveys suggest …

"Prodigals Of Traitors: American Pows During The Korean War, Brainwashing, And National Security", Brett Fearer

History Theses and Dissertations

American prisoners of war (POW) in Korea endured unimaginable hardship and pain while in captivity. American POWs suffered through long marches through the freezing mountains of Korea, were given little food or medical attention, and were sometimes executed on the spot when captured. Upon reaching the permanent POW camps along the Yalu River, POWs encountered a new challenge: Communist indoctrination. When the war ended, twenty-one American POWs chose to stay behind with their Chinese captors instead of returning. Additionally, American POWs were accused of collaborating with the enemy, and some military officials and journalists were suspicious of some POWs having …

A Feminist Approach To Solutions In Urban Development, Lourdes Yessenia Gracia Cantu

Civil Engineering and Environmental Engineering: Sustainability and Development Capstone Projects

Are there ways of occupying space and producing places that somehow contest, challenge, and problematize the dominant modalities of organization, of space and place?

A Feminist Approach to Solutions in Urban Development presents an exploration and proposal of a more equitable and diverse urban design that guarantees the use of public space as a place for economic development. With a focus on the recent theory and social movement concerning the impact of the built environment on women, children and older adults, urban feminist, comes across as a participatory planning process that ensures the involvement of multilevel agendas, to react and …

Eco-Interoception: What Plants, Fungi And Protista Have Taught My Body, Sara Riley Dotterer

Art Theses and Dissertations

To me, ecology is the relational, full-body awareness that I am made up of and deeply connected to everything around me; and for better or worse, this is reciprocal. I form ecotones, an ecological transitional zone between two ecosystems, with the world around me. I use this ecotonal lens to blur binaries and dissolve boundaries between me and the world “outside my body.” During my Masters of Fine Arts at Southern Methodist University, I have continuously explored and represented the lives of various more-than-human species outside of my body, including plants, fungi and protista through an ecotonal lens. Although these …

Photonic Sensors Based On Integrated Ring Resonators, Jaime Da Silva

Mechanical Engineering Research Theses and Dissertations

This thesis investigates the application of integrated ring resonators to different sensing applications. The sensors proposed here rely on the principle of optical whispering gallery mode (WGM) resonance shifts of the resonators. Three distinct sensing applications are investigated to demonstrate the concept: a photonic seismometer, an evanescent field sensor, and a zero-drift Doppler velocimeter. These concepts can be helpful in developing lightweight, compact, and highly sensitive sensors. Successful implementation of these sensors could potentially address sensing requirements for both space and Earth-bound applications. The feasibility of this class of sensors is assessed for seismic, proximity, and vibrational measurements.

Texas Exceptionalism And Texas Style Fiddling: Fiddle Contests, Patriarchs, And Musical Markers, Emilie Catlett

Music Theses and Dissertations

The phrase “Texas Fiddle Player” indicates a unique musical identity within the Greater North American Fiddling community. Beyond fiddle tunes, fiddling culture involves technical diversity, interpersonal relationships, various performance contexts, teaching and learning, and the stories making up a community’s collective memory. The Texas Fiddle Player identity is the result of a process of connecting these aspects of fiddling culture to symbols and narratives that evoke a specific kind of “Texan-ness.” This process is a form of musical Texas Exceptionalism, in that it asserts a belief that Texas Fiddle Players are somehow different from their American fiddling peers. This manifests …

Contributions To Causal Inference In Observational Studies, Jenny Park, Daniel F. Heitjan, Christy Boling Turer

Statistical Science Theses and Dissertations

The electronic health record (EHR) is a digital version of the patient chart. All clinically relevant patient information can be accessed from the EHR by professionals involved in the patient’s care. For researchers, the EHR is a rich, convenient source for data to address a vast range of medical research questions.

In observational studies with EHR data, it is common to define the treatment/exposure status as a binary indicator reflecting whether patient was documented to receive a particular medication or procedure. The outcome can be any type of information on patient status documented in the EHR after the treatment has …

Empirical Likelihood Ratio Tests For Homogeneity Of Distributions Of Component Lifetimes From System Lifetime Data With Known System Structures, Jingjing Qu

Statistical Science Theses and Dissertations

In system reliability, practitioners may be interested in testing the homogeneity of the component lifetime distributions based on system lifetimes from multiple data sources for various reasons, such as identifying the component supplier that provides the most reliable components.

In the first part of the dissertation, we develop distribution-free hypothesis testing procedures for the homogeneity of the component lifetime distributions based on system lifetime data when the system structures are known. Several nonparametric testing statistics based on the empirical likelihood method are proposed for testing the homogeneity of two or more component lifetime distributions. The computational approaches to obtain the …

Grammatical Triples Extraction For The Distant Reading Of Textual Corpora, Stephanie Buongiorno, Stephanie Buongiorno

Multidisciplinary Studies Theses and Dissertations

Grammatical triples extraction has become increasingly important for the analysis of large, textual corpora. By providing insight into the sentence-level linguistic features of a corpus, extracted triples have supported interpretations of some of the most relevant problems of our time. The growing importance of triples extraction for analyzing large corpora has put the quality of extracted triples under new scrutiny, however. Triples outputs are known to have large amounts of erroneous triples. The extraction of erroneous triples poses a risk for understanding a textual corpus because erroneous triples can be nonfactual and even analogous to misinformation. Disciplines such as the …

Real-Time Detection And Suppression Of Malicious Attacks Using Machine Learning And Processor Core Events, Robert Oshana

Computer Science and Engineering Theses and Dissertations

Detecting and suppressing malicious attacks continues to challenge designers and users of embedded and edge processing systems. Embedded systems and IoT devices are becoming more prevalent and they are evolving to accommodate the increased complexity requirements of edge computing by incorporating increasing levels of advanced security, energy efficiency, connectivity, performance, and increased computational power to support, for example, machine learning intelligence. These capabilities can be used in a collaborative way to provide a means for detecting a family of side channel malware attacks based upon the exploitation of timing side channels arising from cache and branch prediction circuitry. The SPECTRE …

Visualized Algorithm Engineering On Two Graph Partitioning Problems, Zizhen Chen

Computer Science and Engineering Theses and Dissertations

Concepts of graph theory are frequently used by computer scientists as abstractions when modeling a problem. Partitioning a graph (or a network) into smaller parts is one of the fundamental algorithmic operations that plays a key role in classifying and clustering. Since the early 1970s, graph partitioning rapidly expanded for applications in wide areas. It applies in both engineering applications, as well as research. Current technology generates massive data (“Big Data”) from business interactions and social exchanges, so high-performance algorithms of partitioning graphs are a critical need.

This dissertation presents engineering models for two graph partitioning problems arising from completely …

Journey With A Purpose, Walter Prescher

Doctor of Ministry Projects and Theses

The modern church is in bondage from years of trauma rooted in the Post-Christendom decline. As the church has responded to the trauma it is enduring, it has responded by becoming stagnant as it seeks to maintain any relevance it still has. What the modern church is going through has strong parallels with the Hebrew people who were in bondage in Egypt and were delivered through the wilderness into the promised land of Canaan. Following this example, this dissertation walks church leadership through an understanding of the traumatized church and presents a what a modern-day Exodus journey could look like …

Three Essays In The Economics Of Child Development And Health Inequities, Travis Whitacre

Economics Theses and Dissertations

In chapter 1, I assess the long-term education and labor market effects of missed ADHD diagnoses. Doing so is challenging for two reasons. First, a person's true ADHD status is unobserved; only their diagnosed status is known. Second, even if diagnostic errors are observed, they are likely akin to non-classical misclassification errors and therefore endogenous. To overcome these empirical challenges, I use and extend on a partial observability model with genetic data from Add Health. Through the lens of the partial observability model. I recover an estimate of true ADHD status, and the probability of underdiagnosis. Then, I estimate their …

Protein Dynamics In Allostery And Computer-Aided Drug Design, Mayar Mohamed

Chemistry Theses and Dissertations

Molecular dynamics (MD) simulation is a powerful and versatile computational tool, that can be used in a wide range of applications from studying complex biological processes such as allostery to investigating the process of the protein-ligand binding in different computer-aided drug design implementations. In this work, various structural and drug discovery projects were performed by combining the state-of-art techniques molecular dynamics simulations, virtual screening, and binding free energy calculations with the innovative Markov State Model analysis and the machine learning techniques.

In the first project, the role of A’a helix as a key player in the transition between the light …

New Methods For Core-Hole Spectroscopy Based On Coupled Cluster Theory, Megan Simons

Chemistry Theses and Dissertations

X-ray absorption spectra (XAS) is a method used to investigate atomic local structure and electronic states. Coupled cluster method is a numerical method used for describing many-body systems and electron correlation in a wavefunction. When equation-of-motion coupled cluster is used in XAS calculations, the ground state is applied to the excitation operator, which excites or ionizes the electron. This causes a large orbital relaxation error, normally ~5 eV, which leads to the need for triple excitations in order to obtain accurate results.

This dissertation introduces a coupled cluster method that uses "transition potential" reference orbitals to reduce the orbital relaxation …

The Hospitality Of Doubt, Ian Grieve

Art Theses and Dissertations

This paper discusses the last two years of research toward a Master of Fine Art in Studio Art. I mainly address my painting practice, but while in the program, I have worked in collage, ceramics, intaglio printmaking, and sculpture. My paintings are thick, multilayered, and often contain ambiguous narratives. The pictures develop through engagement, openness, and response within the work. I seek and embrace connection with viewers of the work. The spectator ‘completes’ the art and enhances or alters the artworks meaning by observing it and applying their individual perspectives. I seek to incorporate a sense of nostalgia and familiarity. …

Equity In Transportation: Data Driven Analysis Of Transportation Services And Infrastructures, Javad Jomehpour Chahar Aman

Civil and Environmental Engineering Theses and Dissertations

Achieving equity in transportation is an ongoing challenge, as transportation options still vary tremendously when it comes to marginalized populations. This dissertation addresses this challenge by conducting a comprehensive review of existing transportation equity literature and identifying two critical gaps: the lack of data-driven approaches to studying spatial mismatch between transportation supply and demand, and limited information on women's perceptions and expectations towards emerging transportation services.

Chapter two introduces the concept of transportation "deserts," specifically transit deserts and walking deserts, and develops data-driven frameworks to identify and investigate neighborhoods with limited transportation service supply but high demand. The frameworks compare …

A Mechanics-Based Analytical Solution For Restrained Beams With Application To Progressive Collapse Behavior, Leven Deputy

Civil and Environmental Engineering Theses and Dissertations

This dissertation presents an axially restrained beam (ARB) model that incorporates axial-flexural interaction throughout the entire static load-deflection curve: the elastic material range, the plastic, flexural dominant range, the range beyond plastic flexure with increasing catenary effect, and the full catenary range. Energy methods are applied to static load-deflection curves to determine dynamic load-deflection relationships. Specifically, this dissertation considers the two conditions; Pinned-Pinned-Pinned (PPP) which has no flexural resistance at the boundaries, and Fixed-Fixed-Fixed FFF (also Pinned-Fixed-Pinned, PFP) condition which provides the beam with flexural resistance at the boundaries equal to flexural capacity of the beam. Behavior is explained analytically …