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3D Printing of Zinc Anode for Zinc Ion Batteries

Description: Recently, 3D printing has received increasing attention for the fabrication and assembly of electrodes for batteries due to the freedom of creating structures in any shape or size, porosity, flexibility, stretchability, and chemistry. Particularly, zinc ion batteries (ZIBs) are favored due to high safety, cheap materials cost, and high volumetric capacity (5,849 mAh/cm3), however, rapid evaporation of Zn due to low melting temperature has limited its 3D printability via conventional laser-based… more
Date: December 2021
Creator: Amoko, Stephen Adot Oyo
Partner: UNT Libraries
open access

Additive Manufacturing of AZ31B Magnesium Alloy via Friction Stir Deposition

Description: Additive friction stir deposition (AFSD) of AZ31B magnesium alloy was conducted to examine evolution of grain structure, phases, and crystallographic texture. AFSD was carried out using a hollow tool made from tool steel at a constant rotational velocity of 400 rpm on the AZ31B base plate. Bar stock of AZ31B was utilized as a feed material. The linear velocity of the tool was varied in the range of 4.2-6.3 mm/s. The feed rate of the material had to be maintained at a half value compared to the … more
Date: December 2021
Creator: Patil, Shreyash Manojkumar
Partner: UNT Libraries
open access

Adoption of Credit-Hour Reductions in Master of Divinity Programs at the Association of Theological Schools Member Institutions: An Event History Analysis

Description: Seminaries in the United States have for more than two centuries sought to equip ministerial leaders for service within the community of faith. And yet these institutions have traditionally been the focus of very little quantitative research. This lack of data is particularly noteworthy given the existential crises many seminaries currently face, especially regarding their flagship Master of Divinity (MDiv) programs. Among seminary leadership, a common response to declining MDiv enrollment has … more
Date: December 2021
Creator: McKanna, Nathan Jay
Partner: UNT Libraries

Advanced Cathodes for High Energy Density Lithium Sulfur Battery

Description: A systematic development of 2D alloy catalyst with synergistic performance of high lithium polysulfide (LiPS) binding energy and efficient Li+ ion/electron conduction is presented. The first section of work found that Li+ ions can flow through the percolated ion transport pathway in polycrystalline MoS2, while Na+ and K+ ions can easily flow through the percolated 1D ion channel near the grain boundaries. An unusually high ionic conductivity of extrinsic Li+, Na+, and K+ ions in 2D MoS2 film ex… more
Date: December 2021
Creator: Bhoyate, Sanket
Partner: UNT Libraries

Aerodynamic Optimization of a 2D Airfoil for Rotary-Wing Aircraft at Mars Atmospheric Conditions

Description: The interest toward Mars exploration has been considerably increasing due to also the successful deployment of the Perseverance rover and the continuous tests developed by SpaceX's launch vehicle, Starship. While the Mars 2020 mission is currently in progress, the first controlled flight on another planet have been proven in April 2021 with the vertical take-off and landing of the Ingenuity rotorcraft on Mars. In addition, the rotorcraft Dragonfly is expected to achieve the same endeavor in Tit… more
Date: December 2021
Creator: Saez, Aleandro G.
Partner: UNT Libraries
open access

Air Corridors: Concept, Design, Simulation, and Rules of Engagement

Description: Air corridors are an integral part of the advanced air mobility infrastructure. They are the virtual highways in the sky for transportation of people and cargo in the controlled airspace at an altitude of around 1000 ft. to 2000 ft. above the ground level. This paper presents fundamental insights into the design of air corridors with high operational efficiency as well as zero collisions. It begins with the definitions of air cube, skylane or track, intersection, vertiport, gate, and air corrid… more
Date: December 2021
Creator: Muna, Sabrina Islam
Partner: UNT Libraries

Algebraic Trait for Structurally Balanced Property of Node and Its Applications in System Behaviors

Description: This thesis targets at providing an algebraic method to indicate network behaviors. Furthermore, for a signed-average consensus problem of the system behaviors, event-triggering signed-average algorithms are designed to reduce the communication overheads. In Chapter 1, the background is introduced, and the problem is formulated. In Chapter 2, notations and basics of graph theory are presented. It is known that the terminal value of the system state is determined by the initial state, left eigen… more
Date: December 2021
Creator: Du, Wen (Electrical engineering researcher)
Partner: UNT Libraries

Analysis of the Integration of LEO Satellite Constellations into 5G Networks

Description: Low Earth orbit (LEO) satellite systems have been proposed as a resource for combating the challenges in 5G network coverage and expanding connectivity to a global realm. This research focuses on the current architecture of LEO satellite constellations, with an emphasis on satellite coverage, visibility patterns and coordination schemes. Key-elements of integrating LEO satellites into the eMBB component of 5G are presented and a breakdown of potential link channel characteristics and physical l… more
Date: December 2021
Creator: Cruz Vazquez, Martin
Partner: UNT Libraries
open access

Analyzing the Principal Perspective to Lead the Implementation of Learning Technologies in Public Schools: A Multi-Strategy Study

Description: As technologies for learning become increasingly available in K-12 schools, the role and responsibilities of campus principals continue to evolve. Incorporating technologies in schools requires shifts in practices, the development of new skills, and in some cases, changes in the mindset of stakeholders. Schools should be capable of absorbing the knowledge and creating the systemic structures required for the implementation ICTs. The purpose of this study was to research the principals' perspect… more
Date: December 2021
Creator: Orta, Nelson A
Partner: UNT Libraries

Anxiously Yours, (fe)mail: A Narrative Exploration of Anxiety, Empathy and Hope in Art Museum Education

Description: This research explores the relationship between narrative, empathy and anxiety in art museum education. The study begins from my personal experience with anxiety and is methodologically rooted in narrative inquiry and friendship as method. In this study, I propose a creative method of narrative postcard writing called (fe)mail – rooted in a feminist ethic of care that seeks to understand and empathize with the experience of others through correspondence. This research asks relevant questions ab… more
Date: December 2021
Creator: Galuban, Beatriz Asfora
Partner: UNT Libraries
open access

Assessing the Clinical Experiences and Attitudes of Play Therapists Working with Children of Parental Substance Use

Description: This study aimed to gain insight into the clinical practices and attitudes of currently practicing play therapists working with children with a parent with a substance use disorder. Participants in the study were play therapists credentialed by the Association for Play Therapy, either as a Registered Play Therapist™ or Registered Play Therapist-Supervisor™. A total of 198 play therapists participated in the study. Results demonstrated that variables including prior education, caseload of childr… more
Date: December 2021
Creator: Yurkovich, Chelsea V
Partner: UNT Libraries
open access

A Behavior Analytic Account of Humor Responses: Taking a Joke Way Too Seriously

Description: Compared to other examples of human behavior, humor responses have received relatively little attention from the scientific community and by the behavior analytic community in particular. This study investigated what some of the controlling variables for humans to emit a humor response may be. Participants were randomly presented two types of word sequences/jokes: one with a matching punchline and one without a matching punchline. Participants rated whether the jokes were funny or not funny, an… more
Date: December 2021
Creator: Amezquita IV, Edward Brandon
Partner: UNT Libraries

Behavioral and Neural Correlates of Speech Perception Outcomes in Adults with Cochlear Implants

Description: Postlingually deafened cochlear implant (CI) adults have large variability in speech perception abilities. While CIs are one of the most successful neural prosthetic devices, they are not able to adequately provide fine structure cues which results in a degraded signal for the listener to interpret. While behavioral measures remain the gold standard for determining speech perception abilities, an objective measure is needed for patients who are unable to provide reliable behavioral responses. B… more
Date: December 2021
Creator: Manning, Jacy
Partner: UNT Libraries

Behind the Curtain of Public Space: Revealing the Narratives of Corporate Street Hawking in Globalizing Accra

Description: All street hawkers are not the same in many Newly Industrialized Countries (NICs) of the global south as often portrayed by the media and documented in extant literature. This perception has created a gap in knowledge as researchers explore street hawking activities in NICs. In this study, I investigated a new informality trend of street hawking is coming into being within the capital city of Accra, Ghana. As governance is increasingly becoming entrepreneurial, informal activities are gradually… more
Date: December 2021
Creator: Ansah, Hilary Ama
Partner: UNT Libraries

Body Doubles: Materiality and Gender Non-Binarism in Victorian Supernatural Fiction

Description: This dissertation is a study of supernatural doubles in Victorian literature. It argues that these doubles expand our understanding of gender variance in the Victorian period. The texts in this dissertation privilege gender non-binarism through their depictions of materiality, gender embodiment, and temporality.
Date: December 2021
Creator: Schneider, Katherine
Partner: UNT Libraries

A Career Construction Expressive Arts Group: An Exploration of Self-Concept and Life Themes of Preadolescent Girls

Description: Preadolescence is a transitional stage between childhood and adolescence characterized by rapid and erratic change. Preadolescent girls are particularly vulnerable to negative impacts to self-concept and adaptability and may benefit from support to strengthen these key aspects of their development. School-based expressive arts groups provide a developmentally appropriate opportunity for preadolescent girls to process their thoughts, feelings, and experiences that can influence their self-concep… more
Date: December 2021
Creator: Hastings, Tessa M.
Partner: UNT Libraries
open access

Character Strengths in High School Choir: Students' Perceptions of Their Choral Experience

Description: The purpose of this study was to examine the prevalence of character strengths that high school students reported to develop while participating in choir. I created the Character Strengths in Choir Scale (CSCS) to explore the degree to which students believed they exercised 18 character strengths. Local choir students in the pilot study (n = 44) and the main study (n = 114) completed the CSCS and revealed that gratitude, teamwork, and honesty were among the most prevalent strengths while braver… more
Date: December 2021
Creator: Critchfield, Jared B., II
Partner: UNT Libraries
open access

The Choral Music of Elaine Hagenberg: From Process to Product to Performance

Description: The Choral Music of Elaine Hagenberg explores the oeuvre of composer Elaine Hagenberg through a musicological, qualitative, and performance-based analysis of her compositional style that has led to her increasing acclaim. This study serves as the first primary source of scholarly output on her. Through an examination of her musical background as a pianist and choral educator, one can identify her principal sources of musical inspiration: text, nature, and her faith. Shaped by these experiences,… more
Date: December 2021
Creator: Cathlina, Francis
Partner: UNT Libraries
open access

CO2 Transport and Acid-Base Status during Fluctuations in Metabolic Status in Reptiles

Description: Reptiles can often experience perturbations that greatly influence their metabolic status (e.g., temperature, exercise, digestion, and ontogeny). The most common cause of fluctuations in metabolic status in post-embryonic reptiles is arguably digestion and physical activity (which will be further referred to as exercise). The objective of this thesis is to determine the mechanisms involved in CO2 transport during digestion, determine the mechanisms that allow for the maintenance of acid-base ho… more
Date: December 2021
Creator: Conner, Justin Lawrence
Partner: UNT Libraries
open access

Comparing a Hear-Say and See-Say Teaching Procedures during Verbal Behavior Instruction

Description: Establishing effective language intervention for those who struggle to acquire it early on has received significant attention from researchers within the field of behavior analysis. The procedures of the present study were adapted from Spurgin' thesis research from 2021, in which a stimulus specific consequence was used during teaching after participants made correct responses. In this case, the stimulus specific consequence was a label for a picture that participants were required to point to … more
Date: December 2021
Creator: Borquez, Nicholas Paul
Partner: UNT Libraries
open access

Comparison of Holograph and Copyist Scores of Charles Martin Loeffler's "Rapsodies pour voix, clarinette, alto, et piano" (1898)

Description: Rapsodies pour voix, clarinette, alto, et piano is a set of three songs by Charles Martin Loeffler (1861-1935) with text by Maurice Rollinat (1846-1903). The songs were composed in the summer of 1898 but never published during Loeffler's lifetime. This study compares Loeffler's holograph and copyist scores, showing differences in pitch, rhythm, and various articulation markings. Loeffler and Rollinat's biographies are included, along with scans of the holograph and copyist scores.
Date: December 2021
Creator: Lickteig, Daniel Paul
Partner: UNT Libraries
open access

Computational Techniques for Accelerated Materials Discovery

Description: Increasing ubiquity of computational resources has enabled simulation of complex electronic systems and modern materials. The PAOFLOW software package is a tool designed to construct and analyze tight binding Hamiltonians from the solutions of DFT calculations. PAOFLOW leverages localized basis sets to greatly reduce computational costs of post-processing QE simulation results, enabling efficient determination of properties such as electronic density, band structures in the presence of electric… more
Date: December 2021
Creator: Cerasoli, Franklin
Partner: UNT Libraries
open access

Contradictory Attitudes towards Partisan Issues: Abortion and Gun Control

Description: In this study, I examine how self-reported religiosity predicts political opinion toward abortion and gun control. In particular, I examine how self-reported religiosity relates to individuals' inconsistent attitudes on these two issues where liberal attitudes are held toward one issue, but conservative attitudes are held toward the other. Most commonly, these inconsistent attitudes are found among individuals who hold pro-life (conservative) and pro-gun control (liberal) views. Using data from… more
Date: December 2021
Creator: Pinney, Sarah
Partner: UNT Libraries
open access

The Convolutional Recurrent Structure in Computer Vision Applications

Description: By organically fusing the methods of convolutional neural network (CNN) and recurrent neural network (RNN), this dissertation focuses on the application of optical character recognition and image classification processing. The first part of this dissertation presents an end-to-end novel receipt recognition system for capturing effective information from receipts (CEIR). The main contributions of this research part are divided into three parts. First, this research develops a preprocessing metho… more
Date: December 2021
Creator: Xie, Dong
Partner: UNT Libraries
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