UNT Theses and Dissertations - 9,784 Matching Results

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Acenaphthene and 1,10-Phenanthroline-Fused Βeta-Functionalized Porphyrins

Description: A series of acene-fused porphyrins and 1,10-phenanthroline-fused porphyrins were synthesized and characterized via NMR spectroscopy and mass spectrometry. The acene-fused porphyrins exhibit unique optoelectronic properties, most notably they exhibit highly red-shifted absorption bands. The 1,10-phenanthroline-fused porphyrins are of interest for their ability to bond to as variety of metals to form chelation complexes.
Date: December 2023
Creator: Arvidson, Jacob Randall
Partner: UNT Libraries

Acute and Sublethal Impacts of Crude Oil Photo-Induced Toxicity in an Early Life Stage Marine Fish (Sciaenops ocellatus) and Invertebrate (Americamysis bahia)

Description: We investigated the modifying effects of ultraviolet (UV) light and chemical dispersant (Corexit 9500A) on crude oil toxicity in juvenile mysids (≤ 24 h) (Americamysis bahia) and larval red drum (24-72 hpf) (Sciaenops ocellatus). These results demonstrate that crude oil toxicity significantly increases with co-exposure to environmentally relevant UV levels in both species, indicating photo-induced toxicity. This toxicity was further exacerbated by the application of chemical dispersants which i… more
This item is restricted from view until January 1, 2025.
Date: December 2023
Creator: Leads, Rachel Renee
Partner: UNT Libraries
open access

An Analysis of Litigation against North Carolina Educators and School Districts under the North Carolina Tort Claims Act

Description: This dissertation discussed the impact of the North Carolina Tort Claims Act and the history of governmental immunity that has protected school districts and school employees in North Carolina. The research question addressed was: how have North Carolina state courts interpreted the North Carolina Tort Claims Act in litigation against North Carolina school districts and their employees? The North Carolina Tort Claims Act provided citizens with a vehicle to sue local governmental agencies and t… more
Date: December 2023
Creator: Harned, Jason Douglas
Partner: UNT Libraries
open access

An Analytical Study of the Suite for Violin and Piano (1935), Op. 6, by Benjamin Britten (1913-1976)

Description: The Suite for Violin and Piano, Op. 6 is one of the least-known compositions by Benjamin Britten. It has been considered unfavorably by critics and scholars due to its puzzling mixture of tonal and post-tonal elements. However, this dissertation argues that the suite is composed with a clear tonal framework, and its unique mixed tonal-post-tonal language justifies an in-depth analysis. This analytical study utilizes a linear progression technique - the voice leading produced by passing tones an… more
Date: December 2023
Creator: Lee, Hanjun
Partner: UNT Libraries
open access

Analyzing the Joint Effects of Network and Community Attributes on Network Performance: Evidence from Local Continuum of Care Homeless Service Networks

Description: This dissertation examines the factors and combinations of factors that affect the performance of continuum of care homeless service networks, applying the configurational approach of contingency theory to data sets drawn from federal sources. The study accepts the two key assumptions from the theory: (1) that there are multiple paths to high performance and (2) key conditions have a joint influence on network performance. The data analysis in this study has two parts. The first employs OLS reg… more
Date: December 2023
Creator: Kim, Jintak
Partner: UNT Libraries
open access

Are We Zwisch-ing Yet? An Examination of the Zwischenfach Voice Category and Selected Twenty-First Century American Arias

Description: The German word Zwischenfach often refers to opera roles and singers whose voices lie between the categories of mezzo-soprano and soprano. While the term is not universally accepted as a voice category, Zwischenfach voices and roles are being discussed more openly and with more specificity in collegiate and professional circles. This document includes a discussion on the challenges of categorizing dramatic voices, mezzo-soprano voices, and those who could be considered Zwischenfach, taking into… more
Date: December 2023
Creator: Taylor, Hilary Grace
Partner: UNT Libraries
open access

California Public Schools and Employees' Negligence of Supervision on School Property

Description: We live in a culture where school systems are accused of being negligent or at fault for any undesired outcome. This can leave school districts and their employees anxious about potential consequences, regardless if the negligent claim is warranted or not. Therefore, there is a need for all educators to understand their responsibilities to provide a safe learning environment, and this may look different from state to state across the United States. The purpose of this study was to analyze how C… more
Date: December 2023
Creator: Gonzales, Manuel Salas
Partner: UNT Libraries

Collegiate Experiences of Female Undergraduate Students in an Afghan University

Description: Amidst the turbulence of political shifts and the re-emergence of the Taliban, this phenomenological research shines a light on the lived experiences, aspirations, and challenges of female undergraduate students in an Afghan university. Through in-depth, qualitative interviews, this study unravels six pivotal themes shaping their collegiate journey: gender-centric oppression, systemic and structural barriers, academic hindrances, family support, and the motivation to endure and prevail amidst p… more
This item is restricted from view until July 1, 2024.
Date: December 2023
Creator: Juya, Masoud
Partner: UNT Libraries
open access

The Competency Pipeline: Examining the Association of Doctoral Training with Early Career Outcomes

Description: Participants from earlier nationwide studies on predictors of internship match were contacted 7-10 years after obtaining their doctoral degree to gather additional data concerning their attained early career competencies and benchmarks (e.g., scores on the national licensing exam). In this sample (N = 190), licensure exam scores were significantly positively associated with scores obtained on the Graduate Record Examination (GRE), family of origin socioeconomic status, and student debt load. Ho… more
Date: December 2023
Creator: Ortiz, Andrea
Partner: UNT Libraries
open access

A Comprehensive Investigation of Photoinduced Electron Transfer and Charge Transfer Mechanisms in Push-Pull Donor-Acceptor Systems: Implications for Energy Harvesting Applications

Description: Donor-acceptor systems exhibit distinctive attributes rendering them highly promising for the emulation of natural photosynthesis and the efficient capture of solar energy. This dissertation is primarily devoted to the investigation of these unique features within diverse donor-acceptor system typologies, encompassing categories such as closely covalently linked, push-pull, supramolecular, and multi-modular donor- acceptor conjugates. The research encompasses an examination of photosynthetic an… more
Date: December 2023
Creator: Alsaleh, Ajyal Zaki
Partner: UNT Libraries
open access

Conditional Disclosure of Secrets and Storage over Graphs

Description: In the era of big data, it is essential to implement practical security and privacy measures to ensure the lawful use of data and provide users with trust and assurance. In the dissertation, I address this issue through several key steps. Firstly, I delve into the problem of conditional secret disclosure, representing it using graphs to determine the most efficient approach for storing and disclosing secrets. Secondly, I extend the conditional disclosure of secrets problem from a single secret … more
Date: December 2023
Creator: Li, Zhou
Partner: UNT Libraries
open access

Cross-Conjugation Effects on Fused β, β'–π–Extended Porphyrins

Description: Cross-conjugation in molecules has been seen in nature for many years but was not pursued due to the difficulty of their synthesis and their lack of stability. Recently, it has become more interesting due to the rise of molecular electronics. Linear conjugation serves well as the wires to conduct electrons, but molecular electronics are made up of more than just wires. Molecules are needed that possess an on/off switch that can allow or deter conduction. Cross-conjugated systems show promise in… more
Date: December 2023
Creator: Washburn, Spenser L.
Partner: UNT Libraries
open access

Cross-Pollinating Culturally Sustaining Pedagogies and Systemic Functional Linguistics in English as a Second Language (ESL) Classrooms

Description: This exploratory case study research was conducted with a view to exploring how teachers teaching emergent bilingual students in ESL programs can enact the principles of culturally sustaining systematic functional linguistics (CS SFL), such as critical centering, historicizing, curricularizing, teaching and learning cycle (TLC), and semantic waving in their classrooms. Two middle school teachers participated in the study and used CS SFL principles to teach their emergent bilingual students. I g… more
Date: December 2023
Creator: Rana, Lal Bahadur
Partner: UNT Libraries

Cyber Addiction and Information Overload and Their Impact on Workplace Productivity

Description: The research examines the relationship between cyber addiction (excessive use of the Internet, CA), information overload (IO), and assesses their impact on workplace productivity. A multi-methods approach is used employing the Internet Addiction Test (IAT) and a quantitative survey design to assess and test the stated hypothesis. The study used random sampling methods targeting 150 respondents from different information technology departments of various organizations. The study hypothesizes tha… more
This item is restricted from view until January 1, 2025.
Date: December 2023
Creator: Alboulayan, Moneerah Abdulhameed M.
Partner: UNT Libraries
open access

Decoding Fantasy: An Analysis of Paquito D'Rivera's "Caribbean Berceuse" (2021)

Description: Written for and featuring the Barcelona Clarinet Players, Caribbean Berceuse (2021) is Paquito D'Rivera's (b.1948) first composition for wind band. Along with idiosyncratic expectations of fusing jazz and classical elements according to D'Rivera's oeuvre, the title implies extramusical associations in the composition. This analysis demonstrates how extramusical associations interact with thematic development by using five codes of meaning from Roland Barthes's (1915–1980) S/Z (1970), which was … more
Date: December 2023
Creator: Truan, Robert Michael
Partner: UNT Libraries
open access

Degradation Mechanisms and Dynamics of Silicon Telluride: A Guide to the Effective Fabrication and Characterization of Silicon Telluride-Based Devices

Description: Silicon telluride (Si2Te3) and many other tellurium containing compounds show emergent Raman peaks located at ~120 cm-1 and ~140 cm-1 as they age. The origin of these two emergent peaks is controversial in the literature and has been attributed to myriad causes such as the intrinsic Raman modes of the telluride materials, surface oxidation, defects, double resonances, and tellurium precipitates. The controversial nature of these peaks has led to the misidentification of highly degraded materia… more
Date: December 2023
Creator: Hathaway, Evan Allen
Partner: UNT Libraries

Development and Characterization of Compliant Bioelectronic Devices for Gastrointestinal Stimulation

Description: In this research, we aimed to develop thin-film devices on a polymer substrate and an alternative 3D-printed device with macroelectrodes for treating gastrointestinal (GI) conditions. First, the fabrication of thin-film devices was demonstrated on a softening thiol-ene/acrylate polymer utilizing titanium nitride (TiN) as electrode material. This was achieved by utilizing cleanroom fabrication processes such as photolithography, wet and dry etching. The functionality of the device was shown by p… more
This item is restricted from view until January 1, 2026.
Date: December 2023
Creator: Chitrakar, Chandani
Partner: UNT Libraries

Directing Transition Metal Catalysis of Second and Third Row Metals through Ligand Design

Description: Ligand design is important due to a ligand's ability to tune properties of the transition metals, such as catalytic activity and selectivity. Gold(I) catalysts can be directly impacted by ligands electronically as well as with steric bulk when undergoing enantioselective and regioselective reactions. In the dissertation, a series of gold(I) acyclic diaminocarbenes were synthesized and used to explore the 1,6 enyne cyclization/hydroarylation. The use of metal templated synthesis of the gold(I) a… more
This item is restricted from view until January 1, 2025.
Date: December 2023
Creator: Nguyen, John
Partner: UNT Libraries

The Effect of Developmental Hypoxia on Cardiac Physiology in Three Species: Alligator mississippiensis, Chelydra serpentina, and Danio rerio

Description: In this dissertation, I explored the effects of developmental hypoxia on heart contractility in three separate species of ectotherms: the common snapping turtle (Chelydra serpentina), the American alligator (Alligator mississippiensis), and the zebrafish (Danio rerio). I began with the common snapping turtle and tested whether the utilization of the sarcoplasmic reticulum was altered in response to developmental hypoxia. In the next two chapters, developmental hypoxia of the American alligator … more
This item is restricted from view until January 1, 2025.
Date: December 2023
Creator: Smith, Brandt Ragan
Partner: UNT Libraries
open access

The Effect of Restructuring of Peer Firms on Investment

Description: Firms' operational restructuring involves information relevant to strategic choices as well as future demand and cost conditions. This study examines the relationship between peer firms' restructuring and a company's responsiveness to its growth opportunities. Peer firm restructuring can increase uncertainty with respect to a company's payoffs regarding its investment projects, leading to decreased responsiveness to growth opportunities. Using a large sample of public companies during 2006–2020… more
Date: December 2023
Creator: Kim, Hojoong
Partner: UNT Libraries

The Emergence of Arab Nation-State Nationalism as an Alternative to the Supranational Concept of Ummah

Description: In this dissertation, I examine the political shift or reorientation of Arabs and Muslims from the supranational Ummah to the Western form of nation-state by attending to modern Arabic novel in the period between World War I and World War II. I explore the emergence of secularism in Arab national formation. One of my central arguments is that Arab nationalism is indeed a misleading phrase as it gives the impression of unity and coherence to a complex phenomenon that materialize in a number of t… more
This item is restricted from view until January 1, 2029.
Date: December 2023
Creator: Alhamili, Mohammed Ali M.
Partner: UNT Libraries

An Empirical Investigation of the Medical Supply Chain and Its Impact on Human Solid Organ Transplantation

Description: The objective of this dissertation is to first identify if there are any academic research gaps in our understanding of the medical supply chain and secondly to understand the role and impact of logistics on the human organ transplant process. The first essay identifies the current status of medical supply chain literature and provides future direction for improving the medical supply chain. This was accomplished by preforming a systematic literature review and a bibliometric analysis from 2,16… more
This item is restricted from view until January 1, 2026.
Date: December 2023
Creator: Hiatt, Brian Joseph
Partner: UNT Libraries
open access

Examining the Educational Depth of Medical Case Reports and Radiology with Text Mining

Description: The purpose of this dissertation was to use the technology of text mining and topic modeling to explore unobserved themes of medical case reports that involve medical imaging. Case reports have a valuable place in medical research because they provide educational benefits, offer evidence, and encourage discussions. Their form has evolved throughout the years, but they have remained a key staple in providing important information to the medical communities around the world with educational conte… more
Date: December 2023
Creator: Collinsworth, Amy L.
Partner: UNT Libraries
open access

Exploring Psychological Intimate Partner Violence Using Brief Expressive Writing Essays

Description: Non-physical intimate partner violence (NPIPV) is the most pervasive type of abuse, yet literature has predominantly focused on physical IPV victimization. This study employed a mixed-methods design utilizing archival expressive writing data previously collected to identify the presence of NPIPV victimization. Participants wrote about their experience after a relationship dissolution using the expressive writing paradigm. They were asked to share their deepest thoughts and feelings across two s… more
Date: December 2023
Creator: Laajala, Allison
Partner: UNT Libraries
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