UNT Theses and Dissertations - 441 Matching Results

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Adoption of Wearable Devices by Older Adults

Description: This dissertation is organized in a traditional format while including three essays that address specific research questions. Essay 1 examined the relationship between physical activity and community engagement and their effect on mental well-being among older men and women. Data from National Health and Aging Trends Study (NHATS) from 2018 to 2020 were explored and the posited relationships were tested. This essay provides empirical support that older adults who are reasonably active and invol… more
This item is restricted from view until June 1, 2027.
Date: May 2022
Creator: Enamela, Pranathy
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Advanced Distributed Optimization and Control Algorithms: Theory and Applications

Description: Networked multi-agent systems have attracted lots of researchers to develop algorithms, techniques, and applications.A multi-agent networked system consists of more than one subsystem (agent) to cooperately solve a global problem with only local computations and communications in a fully distributed manner. These networked systems have been investigated in various different areas including signal processing, control system, and machine learning. We can see massive applications using networked s… more
Date: May 2022
Creator: Zhang, Shengjun
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An Analysis of Compressive Sensing and the Electrocardiogram

Description: As technology has advanced, data has become more and more important. The more breakthroughs are achieved, the more data is needed to support them. As a result, more storage is required in the system's memory. Compression is therefore required. Before it can be stored, the data must be compressed. To ensure that information is not lost, efficient compression is necessary. This also makes sure that there is no redundancy in the data that is being kept and stored. Compressive sensing has emerged a… more
Date: May 2022
Creator: Molugu, Shravan
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open access

Artificial Intelligence at Home: Alexa, Are You Influencing My Family?

Description: The purpose of this research is to measure the social shifts that take place in a home where artificial intelligent (AI) devices like Echo Dot and Google Home are fully integrated into their everyday life. Research is currently limited, being that the widespread use of these devices is roughly seven years old. Three main outcomes of this study were related to how often Alexa is being used in homes to solve everyday problems, the lack of overall privacy and security concerns users had, and the l… more
Date: May 2022
Creator: Ra'oof, Jameelah
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Assessing New Dimensions of an Organization's Learning Culture

Description: Work-based and employee-driven informal learning, training and development have been increasing in importance in the last few decades. Concurrently, organizations seek to measure the extent to which they develop a culture and structure that supports individual learning and organizational learning. This study develops and validates a scale that can measure the extent to which an organization is perceived to provide online learning that is personalized for its employees and perceived to recognize… more
Date: May 2022
Creator: Scott, Jennifer Lyne
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Attaining Team Psychological Safety to Unlock the Potential of Diverse Teams

Description: Team psychological safety fosters interpersonal risk-taking and constructive debate. Yet, how psychological safety develops in diverse teams needs to be explained. I apply collective regulatory lenses to shed light on how collective prevention focus (status quo) and collective promotion focus (growth) uniquely affect team psychological safety. I believe promotion focus makes it easier to attain psychological safety, while prevention focus makes it harder. Under a collective promotion lens, team… more
Date: May 2022
Creator: Chen, Victor H.
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Autonomic Zero Trust Framework for Network Protection

Description: With the technological improvements, the number of Internet connected devices is increasing tremendously. We also observe an increase in cyberattacks since the attackers want to use all these interconnected devices for malicious intention. Even though there exist many proactive security solutions, it is not practical to run all the security solutions on them as they have limited computational resources and even battery operated. As an alternative, Zero Trust Architecture (ZTA) has become popula… more
Date: May 2022
Creator: Durflinger, James
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open access

Awareness, Inclusivity, and Action in Western Historical Museums

Description: Dominant narratives in western historical museums often evoke a nostalgia for a Western Frontier that did not actually exist in the United States. Many Western historical museums, in particular, preserve nostalgia of an imagined Western Frontier through narratives of white masculine heroism, by featuring objects and artifacts symbolizing American exceptionalism and conquest, and by developing a sensory experience in exhibits to recreate an idealized time in history. As our understandings of his… more
Date: May 2022
Creator: Brown, Sonia Renee
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open access

Band Theory and Beyond: Applications of Quantum Algorithms for Quantum Chemistry

Description: In the past two decades, myriad algorithms to elucidate the characteristics and dynamics of molecular systems have been developed for quantum computers. In this dissertation, we explore how these algorithms can be adapted to other fields, both to closely related subjects such as materials science, and more surprising subjects such as information theory. Special emphasis is placed on the Variational Quantum Eigensolver algorithm adapted to solve band structures of a periodic system; three distin… more
Date: May 2022
Creator: Sherbert, Kyle Matthew
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CFD Study of Ship Hydrodynamics in Calm Water with Shear Current and in Designed Wave Trails

Description: Although the capability of computational fluid dynamics (CFD) in modeling ship hydrodynamics is well explored in many studies, they still have two main limitations. First, those studies ignore the effect of non-uniform shear current which exists in realistic situation. Second, the focus of most studies was laid more on the seakeeping/maneuvering performance and less attention was paid to survivability of ships due to extreme ship response events in waves, which are considered rare events but i… more
This item is restricted from view until June 1, 2024.
Date: May 2022
Creator: Phan, Khang Minh
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Partner: UNT Libraries
open access

Characterization and Chemical Analysis of Fundamental Components for Lead Acid Batteries

Description: Although markets for alternative batteries, such as Li-ion, are growing, Pb-alloy batteries still dominate the market due to their low cost and good functionality. Even though these Pb-alloy batteries have been around since their discovery in 1859, little research involving advanced characterization techniques, such as synchrotron radiation X-ray diffraction (SR-XRD) and transmission electron diffraction (TEM) have been performed on Pb-alloys and sulfation, a failure mode in lead acid batteries… more
Date: May 2022
Creator: Wall, Michael T
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Chinese Art Songs in the 1930s: An Analysis and Interpretive Guide of Six Selected Songs by Huang Zi (1904-1938)

Description: Chinese art songs—which are derived from over four thousand years of Chinese culture and combine unique Chinese literary and musical flavors with Western compositional techniques—remain largely unknown in the Western world. Chinese art song, a treasure of a genre, deserves more attention from Western singers and scholars. With a population of 1.41 billion, China has the largest potential market for bel canto singing. Not only will studying Chinese art songs enrich a singer's worldview and reper… more
Date: May 2022
Creator: Peng, Bin
Item Type: Refine your search to only Thesis or Dissertation
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open access

Collegiate Student-Athletes' Psychological Distress and Counseling Use during COVID-19

Description: The onset of COVID-19 and cancellation of collegiate sports may have exacerbated student-athletes' psychological distress. Within a national sample of collegiate student-athletes (N = 5755; 66.7% women; 72.3% White), I determined how gender, race, and sport season related to rates of depression, stress, and counseling use. I used a cross-sectional methodology and collected data in April/May 2020. Overall, 26.5% (n = 1526) and 10.6% (n = 612) of the collegiate student-athletes endorsed clinical … more
Date: May 2022
Creator: Slavin, Lindsey Eve
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Community of Inquiry Survey Instrument: Measurement Invariance in the Community College Population

Description: This study aimed to observe measurement invariance between community college students and university students in response to the Community of Inquiry (CoI) Survey instrument. Most studies of the CoI survey instruments have recorded and validated the instruments considering undergraduate or graduate students. This study sought to validate and prove the survey tool as a reliable instrument for the community college population. The study employed SEM and meta-analytic procedures to observe measure… more
Date: May 2022
Creator: Chambers, Roger Antonio
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Comprehensive Remedial and Enhancing Cello Method for Professors and Undergraduate Students: Conformation-Based Theoretical Methodology and Sequential Practical Solutions

Description: Undergraduate cellists from diverse pedagogical backgrounds with various levels of technical proficiency often struggle to adapt to the demanding performance standards of the university environment. Frequently, these challenges are caused by technical concepts that have been incorrectly learned or unaddressed in the cellist's previous educational experience. Designed for university cello professors and undergraduate cello students, this study is a remedial and enhancement technical method for d… more
Date: May 2022
Creator: Totan, Dan Iuliu Mircea
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open access

Computational and Statistical Modeling of the Virtual Reality Stroop Task

Description: The purpose of this research was two-fold: (1) further validate the Virtual Reality Stroop Task HMMWV [VRST; Stroop stimuli embedded within a virtual high mobility multipurpose wheeled vehicle] via a comparison of the 3-dimensional VRST factor structure to that of a 2-dimensional computerized version of the Stroop task; and (2) model the performance of machine learning [ML] classifiers and hyper-parameters for an adaptive version of the VRST. Both the 3-D VRST and 2-D computerized Stroop tasks … more
Date: May 2022
Creator: Asbee, Justin M
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Computational Modeling of Cancer-Related Mutations in DNA Repair Enzymes Using Molecular Dynamics and Quantum Mechanics/Molecular Mechanics

Description: This dissertation details the use of computational methods to understand the effect that cancer-related mutations have on proteins that complex with nucleic acids. Firstly, we perform molecular dynamics (MD) simulations of various mutations in DNA polymerase κ (pol κ). Through an experimental collaboration, we classify the mutations as more or less active than the wild type complex, depending upon the incoming nucleotide triphosphate. From these classifications we use quantum mechanics/molecula… more
Date: May 2022
Creator: Leddin, Emmett Michael
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Considerations in Designing Alloys for Laser-Powder Bed Fusion Additive Manufacturing

Description: This work identifies alloy terminal freezing range, columnar growth, grain coarsening, liquid availability towards the terminal stage of solidification, and segregation towards boundaries as primary factors affecting the hot-cracking susceptibility of fusion-based additive manufacturing (F-BAM) processed alloys. Additionally, an integrated computational materials engineering (ICME)-based approach has been formulated to design novel Al alloys, and high entropy alloys for F-BAM processing. The IC… more
This item is restricted from view until June 1, 2027.
Date: May 2022
Creator: Thapliyal, Saket
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Correlation of Watershed NDVI Values to Benthic Macroinvertebrate Biodiversity in Eight North American Wadeable Streams

Description: Water quality of a stream or river is influenced by the surrounding landscape and vegetation. The Normalized Difference Vegetation Index (NDVI) is commonly used to characterize landcover and vegetation density. Benthic macroinvertebrates are ubiquitous in freshwater streams and are excellent indicators of the quality of freshwater habitats. Data from one NDVI remote sensing flight and one macroinvertebrate sampling event for eight wadeable stream study sites in the National Ecological Observ… more
Date: May 2022
Creator: Gallagher, Denice Lynne
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Corrosion Behavior of High Entropy Alloys in Molten Chloride and Molten Fluoride Salts

Description: High entropy alloys (HEAs) or complex concentrated alloys (CCAs) represent a new paradigm in structural alloy design. Molten salt corrosion behavior was studied for single-phase HEAs such as TaTiVWZr and HfTaTiVZr, and multi-phase HEAs such as AlCoCrFeNi2.1. De-alloying with porosity formation along the exposed surface and fluxing of unstable oxides were found to be primary corrosion mechanisms. Potentiodynamic polarization study was combined with systematic mass–loss study for TaTiVWZr, HfTaT… more
This item is restricted from view until June 1, 2024.
Date: May 2022
Creator: Patel, Kunjalkumar Babubhai
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Partner: UNT Libraries
open access

The Counseling Experiences of Clients Who are Polyamorous: A Phenomenological Inquiry

Description: Polyamory is an identity that describes the ability to experience romantic love with more than one romantic partner at a time. Polyamory is often perceived as being perverse, amoral, and relationally broken or deficient; however, people who identify as polyamorous are found to be as mentally healthy and happy as people who are monogamous. Clients who identify as polyamorous may experience their counselor as lacking familiarity with and knowledge of polyamory or as actively working against their… more
Date: May 2022
Creator: Stevens, Carly Rachel
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open access

Cultures of Elite Theatre in the Elizabethan and Jacobean Masque: Four Incarnations

Description: The early modern English masque is a hybrid form of entertainment that included music, dance, poetry, and visual spectacle, and for which there is no modern equivalent. This dissertation looks at four incarnations of the Elizabethan and Jacobean masque: the court masque, the masque embedded in the progress entertainment, the masque embedded in the commercial play, and the masque embedded in the commercial play performed at court. This study treats masques as a form of elite theatre (that is, th… more
Date: May 2022
Creator: Rogener, Lauren J
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Partner: UNT Libraries

The D-Variant of Transfinite Hausdorff Dimension

Description: In this lecture we introduce a new transfinite dimension function for metric spaces which utilizes Henderson's topological D-dimension and ascribes to any metric space either an ordinal number or the symbol Ω. The construction of our function is motivated by that of Urbański's transfinite Hausdorff dimension, tHD. Henderson's dimension is a topological invariant, however, like Hausdorff dimension and tHD the function presented will be invariant under bi-Lipschitz continuous maps and generally n… more
Date: May 2022
Creator: Decker, Bryce
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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