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UNT Theses and Dissertations
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Photographing Texas
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Journal of Near-Death Studies
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University of North Texas Press
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Texas Pano Project
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Dallas/Fort Worth American Chemical Society Publications
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Texas History for Teachers Resources
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Texas Catholic Newspaper Collection
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Journal of Near-Death Studies
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JNDS, Volume 39, Number 3
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Southwest Retort
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JNDS, Volume 39, Number 2
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South Texas Catholic
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JNDS, Volume 39, Number 1
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UNT Libraries ColorOurCollection Coloring Pages
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Al Filo; no. 11
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American Military Studies Series; no. 5
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Nature Study
A collection of poetry concerned with loss and the act of creation.
Date:
December 2021
Creator:
Abercrombie, Benjamin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Pressure Controlled Topochemical Polymerization in Two-Dimensional Hybrid Perovskite
Mechanical pressure offers unique control over the energy landscape of chemical reactions, opening up pathways that are inaccessible through conventional thermochemistry. We hypothesize that the reduced dimensionality defines the conformational space of the high-pressure reaction, giving rise to new selectivity that is unavailable in 3D systems. Here, we demonstrate this concept through the pressure-controlled topochemical polymerization of the diacetylene molecule deca‐3,5‐diyn‐1‐amine (DDA) incorporated in the two-dimensional (2D) perovskite [DDA]2PbBr4. Compression at 3 GPa drives the first topochemical polymerization through 1,2 addition, forming a polyene product at room temperature. The reaction is initiated by the mechanical bending of the linear DDA molecule, a mechanism fundamentally different from the 1,4-addition in 3D solids. Importantly, pressure hinders the second 1,2-addition by disfavoring the gauche conformation between the remaining acetylene groups, allowing for the selective formation of polyene versus polyacene products. We characterize the reaction mechanisms and products using spectroscopies (Raman, X-ray photoelectron, ultraviolet-visible), X-ray diffraction and density-functional theory simulations. These results highlight the important role of dimensionality in high-pressure chemistry, and offers a new paradigm for creating low-dimensional functional materials.
Date:
December 2021
Creator:
Abu-Amara, Lama Marwan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Exploring the Impact of Adverse Childhood Experiences on Resilience, School Engagement and Success in Adolescents with Co-Occurring Autism Spectrum Disorder and Attention Deficit Hyperactive Disorder
There remains a dearth of literature that explains with no ambiguity, the complex relationships that exist between adverse childhood experiences (ACEs) and resilience, as well as school engagement and school in individuals with a co-occurring diagnosis of autism spectrum disorder (ASD) and attention deficit hyperactive disorder (ADHD). This study seeks to fill this missing gap in the literature. These research questions were answered using a retrospective cross-sectional study design of national secondary data from the National Survey of Children's Health (NSCH). The findings revealed that the more ACEs an individual had, the less they were likely to engage and succeed in school. A similar finding was obtained for resilience as individuals with more ACEs showed less resilience. However, counterintuitively to the hypothesis of the project, having both ASD and ADHD does not necessarily make these outcomes worse compared to having a singular diagnosis of either ASD or ADHD. The significance of this study is that it informs rehabilitation counselors as well as educators on the need for early identification of individuals with ASD and ADHD with a background of ACEs and commence interventions early enough to ensure they are more resilient and obtain improved success in school-related activities as well …
Date:
August 2021
Creator:
Adaralegbe, Ngozi Jane Frances
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Improving Memory Performance for Both High Performance Computing and Embedded/Edge Computing Systems
CPU-memory bottleneck is a widely recognized problem. It is known that majority of high performance computing (HPC) database systems are configured with large memories and dedicated to process specific workloads like weather prediction, molecular dynamic simulations etc. My research on optimal address mapping improves the memory performance by increasing the channel and bank level parallelism. In an another research direction, I proposed and evaluated adaptive page migration techniques that obviates the need for offline analysis of an application to determine page migration strategies. Furthermore, I explored different migration strategies like reverse migration, sub page migration that I found to be beneficial depending on the application behavior. Ideally, page migration strategies redirect the demand memory traffic to faster memory to improve the memory performance. In my third contribution, I worked and evaluated a memory-side accelerator to assist the main computational core in locating the non-zero elements of a sparse matrix that are typically used in scientific, machine learning workloads on a low-power embedded system configuration. Thus my contributions narrow the speed-gap by improving the latency and/or bandwidth between CPU and memory.
Date:
December 2021
Creator:
Adavally, Shashank
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Aerial Photograph of Sam Houston Statue, 'A Tribute to Courage'
A statue or Sam Houston entitled, 'A Tribute to Courage' on the northbound side of I-45 in Huntsville, TX.
Date:
July 6, 2021
Creator:
Adickes, David
Object Type:
Photograph
System:
The Portal to Texas History
Aerial Photograph of Sam Houston Statue, 'A Tribute to Courage'
A statue or Sam Houston entitled, 'A Tribute to Courage' on the northbound side of I-45 in Huntsville, TX.
Date:
July 6, 2021
Creator:
Adickes, David
Object Type:
Photograph
System:
The Portal to Texas History
Aerial Photograph of Sam Houston Statue, 'A Tribute to Courage'
A statue or Sam Houston entitled, 'A Tribute to Courage' on the northbound side of I-45 in Huntsville, TX.
Date:
July 6, 2021
Creator:
Adickes, David
Object Type:
Photograph
System:
The Portal to Texas History
Aerial Video Footage of Sam Houston Statue, 'A Tribute to Courage'
A statue or Sam Houston entitled, 'A Tribute to Courage' on the northbound side of I-45 in Huntsville, TX. Video footage is silent.
Date:
July 6, 2021
Creator:
Adickes, David
Object Type:
Video
System:
The Portal to Texas History
Exploring Flavonoid Glycosylation in Kudzu (Pueraria lobata)
The isoflavones in kudzu roots, especially the C-glycosylated isoflavone puerarin, have been linked to many health benefits. Puerarin contains a carbon-carbon glycosidic bond that can withstand hydrolysis. The C-glycosylation reaction in the biosynthesis of puerarin has not been thoroughly investigated, with conflicting reports suggesting that it could take place on daidzein, isoliquiritigenin, or 2,7,4ʹ-trihydroxyisoflavanone. Kudzu species were identified for use in comparative transcriptomics. A non-puerarin producing kudzu was identified as Pueraria phaseoloides and a puerarin producing kudzu was identified as Pueraria montana lobata. Through the use of the plant secondary product glycosyltransferase (PSPG) motif, glycosyltransferases (UGTs) were identified from the transcriptomes. The UGTs that had higher digital expression in P. m. lobata were examined further using additional tools to home in on the UGT that could be responsible for puerarin biosynthesis. One of the UGTs identified, UGT71T5, had previously been characterized from kudzu as a C-glycosyltransferase involved in puerarin biosynthesis through in vitro enzyme activity (with daidzein) and a gain of function approach in soybean hairy roots. Previous studies have not supported the end-product of a pathway such as daidzein as the target for C-glycosylation, and no genetic analysis of UGT function had been conducted in kudzu. The activity of …
Date:
August 2021
Creator:
Adolfo, Laci Michelle
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Experiences of Parents of Preadolescents with Child–Parent Relationship Therapy
Preadolescence is a time of emotional, physical, social, and relational changes, which can lead to mental health concerns. Parents of preadolescents also experience changes within their roles as parents, and both parents and preadolescents experienced a wide range of changes and challenges during the COVID-19 pandemic. A mental health intervention focused on enhancing the parent-child relationship among parents of preadolescents is important for overall family functioning. This phenomenological study explored the experiences of parents of preadolescents after participating in a virtual child-parent relationship therapy (CPRT) intervention. Participants were seven parents ages 35 to 56 years-old with preadolescent children between the ages of 9 to 12 years-old. Semi-structured interviews were conducted following the CPRT intervention and analyzed. Six themes were found, including impact of group on learning, child's engagement with parent, child qualities, parent's understanding of self, importance of parent-child relationship, and integration of CPRT skills. The emerging themes indicated that the seven participants experienced changes in themselves, in their child, and in their parent-child relationships. Participants discussed their experiences with the virtual format and their integration of CPRT skills. The participants also reported feeling closeness and support from other group members, even with the virtual format. Findings from this study …
Date:
December 2021
Creator:
Agarwal, Sarah M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Classical Simulations of the Drift of Magnetobound States of Positronium
The production and control of antihydrogen at very low temperatures provided a key tool to test the validity for the antimaterial of the fundamental principles of the interactions of nature such as the weak principle of equivalence (WEP), and CPT symmetry (Charge, Parity, and Time reversal). The work presented in this dissertation studies the collisions of electrons and positrons in strong magnetic fields that generate magnetobound positronium (positron-electron system temporarily bound due to the presence of a magnetic field) and its possible role in the generation of antihydrogen.
Date:
August 2021
Creator:
Aguirre Farro, Franz
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Effect of Online Consumer Reviews and Brand Equity on the Consumer Decision Making Process
This research aims to investigate the (1) review effects on consumer decision making process, (2) effects of negative reviews on brand equity, and (3) consumers' likely response to a brand's request for reviews. The objective of the first essay is to investigate the nature of the relationship between skepticism and consumer decision making in an online behavior context. Its second objective is to know whether people's belief on their abilities or their hedonic principle moderates the relationship between a person's skepticism toward online reviews and their reliance on online reviews. The objective of the second essay is to explore whether negative online reviews that focus on service quality specific dimensions have a different effect on a service organization's perceived brand equity. Its second objective is to analyze the role of emotional contagion in the relationship between negative reviews related to various service quality dimensions and its effect on perceived brand equity. The main objective of the third essay is to know whether consumers are more likely to write an online review for a brand when the request comes from a higher equity brand. This essay also investigates how message trust and persuasion knowledge influence the relationship between a brand's request …
Date:
December 2021
Creator:
Ahmad, Fayez
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Fostering Student Employee Engagement: Creating a Sense of Ownership Through Task Sharing Initiatives
Presentation describing how student supervisors developed a task sharing and reporting mechanism to encourage teamwork and improve student engagement. Student supervisors of the Access Services Department are committed to creating a positive and effective work environment while ensuring accountability and productivity. In order to improve students' work experience, the supervisors developed tools and techniques which have increased student engagement in the department operations and empowered them to take initiatives. In addition, these tools have boosted student assistant productivity, provided a sense of ownership and accomplishment, and improved communication with supervisors.
Date:
November 17, 2021
Creator:
Akers, Emily; Baskett, Pilar; Knox, Briana & Keshmiripour, Setareh
Object Type:
Presentation
System:
The UNT Digital Library
Hybrid Optimization Models for Depot Location-Allocation and Real-Time Routing of Emergency Deliveries
Prompt and efficient intervention is vital in reducing casualty figures during epidemic outbreaks, disasters, sudden civil strife or terrorism attacks. This can only be achieved if there is a fit-for-purpose and location-specific emergency response plan in place, incorporating geographical, time and vehicular capacity constraints. In this research, a comprehensive emergency response model for situations of uncertainties (in locations' demand and available resources), typically obtainable in low-resource countries, is designed. It involves the development of algorithms for optimizing pre-and post-disaster activities. The studies result in the development of four models: (1) an adaptation of a machine learning clustering algorithm, for pre-positioning depots and emergency operation centers, which optimizes the placement of these depots, such that the largest geographical location is covered, and the maximum number of individuals reached, with minimal facility cost; (2) an optimization algorithm for routing relief distribution, using heterogenous fleets of vehicle, with considerations for uncertainties in humanitarian supplies; (3) a genetic algorithm-based route improvement model; and (4) a model for integrating possible new locations into the routing network, in real-time, using emergency severity ranking, with a high priority on the most-vulnerable population. The clustering approach to solving dept location-allocation problem produces a better time complexity, and the …
Date:
May 2021
Creator:
Akwafuo, Sampson E
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Collaboration among Conflict Management Practitioners and Human Rights Advocacy Groups
In a civil war, conflict management practitioners are concerned with bringing the conflict to an end and providing security for civilians. Similarly, human rights advocacy groups are also concerned with minimizing civilian harm. Given the similar intentions of these actors in civil war states, this dissertation explores under what circumstances conflict management practitioners and human rights advocacy groups collaborate. First, I compare to what extent mediation and peacekeeping cases differ with regards to showing signs of interaction; second, I compare how the level of interaction changes depending on whether peacekeeping missions are deployed by the United Nations or regional intergovernmental organizations. I find that human rights groups are more likely to interact with peacekeeping missions, especially when the missions are deployed by the United Nations. Moreover, I analyze to what extent the interaction between human rights groups and peacekeeping operations impacts how human rights groups carry out their advocacy efforts. The findings reveal that the way human rights groups use their advocacy efforts depend on whether the third parties providing peacekeeping operations respond to their requests.
Date:
May 2021
Creator:
Akyol, Seyma N.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Understanding the Diffusion of COVID-19-Related Information on Social Media
Very few studies have examined information sentiment and explored other factors that contribute to health information dissemination and sharing. In particular, there is a lack of studies that performed these combined analyses in the modern social network environment during the disease outbreaks, such as with zika, ebola, SARS, or COVID-19. This study aimed to fill the gap in the literature by investigating what drives social media users to widely disseminate health-related information during a pandemic. Diffusion of innovation theory and theory of planned behavior were the basis of the theoretical approach utilized to answer the research questions. The two theories identified antecedents of sharing online health information. Data was collected through an online survey distributed to students in a higher education institution in the United States of America. The study revealed the extent of the relationships between the four major factors derived from the previous literature—attitudes toward sharing, beliefs toward source, peer influence, and information sentiment—and the behavioral intention to share information. The results would support the information science literature by offering and testing a new model that identifies the factors that affect users' intentions to share health information in the social network environment. This study will further the understanding …
Date:
August 2021
Creator:
Alasmari, Hanan Mohammed
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Metal, Pedagogy, Women, Kuwait: An Autoethnographic Feminist Approach to Questioning Systems of Education
This research seeks to explore how the metal arts are taught to women in Kuwait in an undergraduate setting, making the call for the use of feminist pedagogy when teaching the metal arts to women in Kuwait. This research is achieved using the qualitative methodology of analytic autoethnography. The theoretical framework is a feminist lens bridging the social construction of gender with the gendering of objects and feminist standpoint theory. The data comes from the experiences of creating three of my own pieces of artwork as well as the pieces themselves in tandem with historical, political, and cultural contexts. The analysis from this research is then bridged with feminist pedagogy in order to begin to develop an inclusive metal arts curriculum for women in Kuwait.
Date:
May 2021
Creator:
Alayar, Moneerah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Saudi Mothers' Experiences Maintaining Their Young Children's Arabic Language and Islamic-Saudi Identity
As more Saudi individuals temporarily settle in the United States to pursue higher education, it becomes increasingly important to understand the impact this experience has on their families. The purpose of this qualitative instrumental case study was to examine Saudi mothers' experiences and motivations after transitioning to life in the United States. The main research question was: What are Saudi mothers' experiences of supporting their children maintaining and developing Arabic language skills and Islamic-Saudi identities while they are learning English and Western culture in U.S. schools? The sub-questions of the study were: Why do Saudi mothers in this study want their children to learn the Arabic language and culture? What are their concerns? What are the challenges Saudi mothers face in socializing their children to develop their Islamic-Saudi identity? What practices do mothers use to help their children preserve their Arabic language and develop the Islamic Saudi-identity while growing up in the United States? This study was conceptually framed within the theories of parenting style and acculturation. Participants in the study were five Saudi mothers pursuing higher education in Texas. Data were collected through three semi-structured interviews and four audio journals with each participant, and a focus group with the …
Date:
May 2021
Creator:
Albakr, Ashwaq Mohammed
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Open Access and Open Educational Resources for Equitable Scholarly Communication: Rethinking Educational Planning Post-COVID
Presentation that discusses Open Access (OA) and Open Educational Resources (OER) in light of the iniquities in scholarly communication that were made more apparent by the COVID-19 pandemic. This presentation discusses how OA and OER can address social justice concerns, improve scholarly communication, and facilitate equitable educational planning.
Date:
October 14, 2021
Creator:
Alemneh, Daniel Gelaw & Ford, Angela Y.
Object Type:
Presentation
System:
The UNT Digital Library
Rare Integrity: A Portrait of L. W. Payne, Jr.
Access:
Use of this item is restricted to the UNT Community
Leonidas Warren Payne, Jr. (1873-1945), counted Robert Frost among his friends and a member of the inner circle of poets who embraced him and sought his advice. He altered forever the perception of Texas when he created the Texas Folklore Society that continues to record, publish, and promote Texas history, myth, music, and customs. He guided J. Frank Dobie back into The University of Texas fold, where Dobie produced his finest work and established a voice for Texas literature. L. W. Payne, Jr., influenced generations of American school children through his anthologies that became basic English textbooks. Drawing upon Payne’s own writing, interviews with former colleagues and students, and private letters lain undisclosed since Payne’s death, Rare Integrity reveals a portrait of a man whose great gift of creative generosity and warmth of heart enabled him to see a person as the person wished to be seen.
Date:
November 2021
Creator:
Alexander, Hansen
Object Type:
Book
System:
The UNT Digital Library
Radial Solutions of Singular Semilinear Equations on Exterior Domains
We prove the existence and nonexistence of radial solutions of singular semilinear equations Δu + k(x)f(u)=0 with boundary condition on the exterior of the ball with radius R>0 in ℝ^N such that lim r →∞ u(r)=0, where f: ℝ \ {0} →ℝ is an odd and locally Lipschitz continuous nonlinear function such that there exists a β >0 with f <0 on (0, β), f >0 on (β, ∞), and K(r) ~ r^-α for some α >0.
Date:
May 2021
Creator:
Ali, Mageed Hameed
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Status of the Organization of Knowledge in Cultural Heritage Institutions in Arabian Gulf Countries
No published studies to date examined the practices in creation or adoption of metadata in cultural heritage institutions or evaluated metadata in bibliographic databases in the Arabian Gulf counties and assessed its potential interoperability in the aggregation that would provide a central point of access to bibliographic databases of cultural heritage institutions. This exploratory study aimed to address this gap with the goal of: (1) developing understanding of the current state of information representation and knowledge organization in cultural heritage collections in Arabian Gulf countries, and (2) exploring perspectives for future developments such as creating regional large-scale portals similar to Digital Public Library of America, Europeana etc. that facilitate discovery by aggregating metadata and possible barriers to these developments.. The study is focused on a Kuwaiti, Qatari, and Omani libraries, museums, and archives. The mixed-methods research combined semi-structured interviews of the bibliographic database managers at 15 cultural heritage institutions and in-depth content analysis of a sample of 412 metadata records that represent items in these bibliographic databases for accuracy, completeness, consistency, use of knowledge organization systems, etc. This study findings make a research contribution important for evaluating the feasibility and planning of future aggregations of cultural heritage bibliographic databases. Results …
Date:
August 2021
Creator:
Aljalahmah, Saleh H
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Impact of Including Teacher and School Characteristics on Predicting Value-Added Score Estimates
Value-added models (VAMs) have become widely used in evaluating teacher accountability. The use of these models for high-stakes decisions making has been very controversial due to lack of consistency in classifying teachers as high performing or low performing. There is an abundance of research on the impact of various student level covariates on teacher value-added scores; however, less is known about the impact of teacher-level and school-level covariates. This study uses hierarchical linear modeling to examine the impact of including teacher characteristics, school characteristics, and student demographics aggregated at the school level on elementary mathematics and reading teacher value-added scores. Data for this study was collected from a large school district in north Texas. This study found that across all VAMs fitted, 32% of mathematics teachers and 37% of reading teachers changed quintile ranking for their value-added score at least once across all VAMs, while 55% and 65% of schools changed their quintile ranking of value-added scores based on mathematics and reading achievement, respectively. The results show that failing to control for aggregated student demographics has a large impact on both teacher level and school level value-added scores. Policymakers and administrators using VAM estimates in high-stakes decision-making should include teacher- …
Date:
May 2021
Creator:
Allen, Lauren E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analysis of Multipartite Bacterial Genomes Using Alignment-Free and Alignment-Based Pipelines
In this work, we have performed comparative evolutionary analysis, functional genomics analysis, and machine learning analysis to identify the molecular factors that discriminate between multipartite and unipartite bacteria, with the goal to decipher taxon-specific factors and those that are prevalent across the taxa underlying the these traits. We assessed the roles of evolutionary mechanisms, namely, horizontal gene transfer and gene gain, in driving the divergence of bacteria with single and multiple chromosomes. In addition, we performed functional genomic analysis to garner support for our findings from comparative evolutionary analysis. We found genes such as those encoding conserved hypothetical protein DR_A0179 and hypothetical protein DR_A0109 in Deinococcus radiodurans R1, and Putative phage phi-C31 gp36 major capsid-like protein and hypothetical protein RSP_3729 in Rhodobacter sphaeroides 2.4.1, which are located on accessory chromosomes in both bacteria and were not found in the inferred ancestral sequences, and on the primary chromosomes, as well as were not found in their closest relatives with single chromosome within the same clade. These genes emphasize the important potential roles of the secondary chromosomes in helping multipartite bacteria to adapt to specialized environments or conditions. In addition, we applied machine learning algorithms to predict multipartite genomes based on gene …
Date:
August 2021
Creator:
Almalki, Fatemah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library