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Heat Transfer Analysis of Bio-Printed Tissue Mimicking Material Mixed with Silver Nanoparticles (open access)

Heat Transfer Analysis of Bio-Printed Tissue Mimicking Material Mixed with Silver Nanoparticles

Novel tissue mimicking materials have been developed for cancer treatment research. In the present research work, the tissue mimicking material is printed using 3D bioprinting technology. The nanoparticles are homogeneously mixed with tissue mimicking materials to enhance the heating capacity. The thermal conductivity of tissue mimicking materials is measured using a micropipette thermal sensor (MTS). Further, the optimal value is identified based on optimization technique and incorporated into a theoretical model to predict the surface temperature of microsphere. The heat conduction governing equation with Lambert law is numerically solved using COMSOL Multiphysics software. To validate the present simulation results, the experiments are conducted using a continuous laser system.
Date: August 2022
Creator: Chandrasegaran, Jedeshkeran
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Il bel canto russo: Incorporating Principles from the Old Italian School of Singing to Russian Lyric Diction Utilizing the Songs of Mikhail Glinka (1804 -1857)

Mikhail Glinka (1804-1857) is widely recognized as a founding father of Russian classical music, but in fact, his music represents a bridge: it establishes a distinctive Slavic sound built on the Italian roots of Glinka's musical inspiration. As a young man, Glinka traveled abroad, which included three years spent in Italy, where he gained extensive exposure to and familiarity with what modern scholarship refers to as the Old Italian School of Singing. This influence makes his songs an ideal introduction to Russian lyric diction while reinforcing the tenets of sound vocalism. This study explores four Glinka melodies: "Doubt ," "To Molly," "The Lark," and "Cavatina." Previously published only in their original keys, the songs are presented here transposed into keys suitable for a young bass and a young baritone singer, with the melody line placed in the bass clef and corresponding IPA transcriptions beneath the original Cyrillic text. Following both an introduction that contextualizes Glinka as a composer enamored of 19th-century Italian opera and a discussion of technical and stylistic aspects regarding the production of sound in that same era, there is a brief examination of Russian lyric diction intended to inspire further study of this unique and rewarding singing …
Date: August 2022
Creator: McGee, Michael Anthony
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Engineering Cardiac Organoid Vascularization via Fluid Shear Stress and Vascular-Promoting Growth Factors

Cardiovascular disease (CVD) is the leading cause of death internationally. Efforts to decrease CVD death has been explored through stem cell technology, specifically organoid formation. Current cardiac organoid models lack the vascular networks for nutrient supply and maturation. In this study, pillar perfusion technology is used to fabricate cardiac organoids and induce vascularization via dynamic culturing and the addition of vascular promoting growth factors (GFs). In addition to this study, a millifluidic chip is engineered for shear stress application via flow simulations and experimental flow analysis. We successfully optimized the millifluidic chip to achieve fluid shear stress of 20mPa and validated through particle tracking velocimetry using 0.1um diameter beads under flow. The results of cardiac organoids displayed contraction and growth of endothelial cells (ECs) under dynamic flow with GFs. In addition, smooth muscle cells (SMCs) displayed growth via GFs in both dynamic and static culturing. Although vascular networks were not present in all conditions of this experiment, this thesis can serve a basis for searching other methods of inducing vascularization.
Date: August 2022
Creator: Huerta Gomez, Angello
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Performer's Analysis of Georg Schumann's Sonata for Cello and Piano, Op. 19 (open access)

A Performer's Analysis of Georg Schumann's Sonata for Cello and Piano, Op. 19

In the late 19th century, Georg Schumann (1866-1952) composed an attractive sonata for the cello that remains largely unknown today. By presenting a performer's analysis, this dissertation aims to position Georg Schumann's Sonata for Cello and Piano in E minor, Op. 19 (1898) amongst other more commonly performed sonatas of the era. This paper provides a detailed analysis of each movement of the sonata, an overview of the history and development of the cello sonata and an overview of Georg Schumann's biography leading up to the composition of his cello sonata.
Date: August 2022
Creator: Chilton, Kaye Yu-Ho Chang
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Developing a Pedagogical Model for Twentieth Century Flute Repertoire (open access)

Developing a Pedagogical Model for Twentieth Century Flute Repertoire

Modern flute pedagogy tends to focus on repertoire which utilizes or builds upon tonal and Romantic stylistic conventions, largely ignoring works that disregard or reject these conventions until later in student's education. This lack of stylistic diversity in commonly studied works from the first half of the twentieth century can be problematic when students are approaching avant-garde or modernist repertoire for the first time, as they are unfamiliar with the style and technical needs of the pieces. This dissertation provides a style guide and progressive curriculum for the avant-garde repertoire of the early- and mid-twentieth century to help students bridge the gap from commonly-studied early-twentieth century repertoire to Post-War Modernist works. The curriculum and style guide are accompanied by an overview of avant-garde musical styles prominent in Europe and American between the 1890s and 1970s, a discussion of the pedagogical challenges of avant-garde repertoire, and two performance guides for avant-garde pieces included in the curriculum, Diaphonic Suite No. 1 by Ruth Crawford and Variations for Solo Flute by Ursula Mamlok.
Date: August 2022
Creator: Maker, Anne Marie Dearth
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Understanding the Relationship between Critical Literacy, Cultural Literacy, and Religious Literacy for Second-Generation Immigrants (open access)

Understanding the Relationship between Critical Literacy, Cultural Literacy, and Religious Literacy for Second-Generation Immigrants

This study explores information seeking behavior of second-generation Muslim immigrants utilizing factors such as critical, cultural, and religious literacy skills. The study examined the second-generation immigrants' ability to balance their parents' and grandparents' native culture and traditions with the culture and traditions of their country. The interview questions were designed using the cognitive authority theory and the figured worlds theory that provides an explanation for the mentality of those who are in environments influenced by culture or religion. An interesting main finding of the study is that participants sought more religious-based rather than culturally-based information. Participants seek information from their parents, communities, and religious leaders, but are particular with who they consider credible and reliable; if the person providing the information follows a similar lifestyle to the participants, they are more likely to hold cognitive authority. Four different themes emerged from the study. The first is "religious focus" where many participants stated that religion is rather static whereas culture can evolve and change with time, location, and events. The second theme emerged is the reliance on family members for religious literacy given the close upbringing of Muslim extended family system. The third theme indicated that although information seeking behavior relied …
Date: August 2022
Creator: Khader, Malak M
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Weight Initialization for Convolutional Neural Networks Using Unsupervised Machine Learning

The goal of this work is to improve the robustness and generalization of deep learning models, using a similar approach to the unsupervised "innate learning" strategy in visual development. A series of research studies are presented to demonstrate how an unsupervised machine learning efficient coding approach can create filters similar to the receptive fields of the primary visual cortex (V1) in the brain, and these filters are capable of pretraining convolutional neural networks (CNNs) to enable faster training times and higher accuracy with less dependency on the source data. Independent component analysis (ICA) is used for unsupervised feature extraction as it has shown success in both applied machine learning and modeling biological neural receptive fields. This pretraining applies equally well to various forms of visual input, including natural color images, black and white, binocular, and video to drive the V1-like Gabor filters in the brain. For efficient processing of typical visual scenes, the filters that ICA produces are developed by encoding natural images. These filters are then used to initialize the kernels in the first layer of a CNN to train on the CIFAR-10 dataset to perform image classification. Results show that the ICA initialization for a custom made CNN …
Date: August 2022
Creator: Behpour, Sahar
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Cyber Risk Management in Supply Chains: Three Essays on Cyber Resilience, Business Continuity, and Information Security

This dissertation provides empirical and theoretical support for the antecedents and consequences of cyber resilience via three essays on cyber resilience. Essay 1 comprises 2 studies using a multi-method empirical research effort to determine whether emphasizing suppliers' implementation and use of business continuity management (S-BCM) is actually beneficial to buyers. In Study 1, data from 150 managers was collected via a survey-based questionnaire to determine whether buyers' adoption of monitoring supplier operational performance (MS-OP) and monitoring S-BCM (MS-BCM) enhances S-BCM implementation and use. Evidence from Study 1 suggests that MS-BCM is more effective than MS-OP. Moreover, the results suggest that while buyer power positively augments the effectiveness of MS-BCM, it actually has a diminishing effect on the effectiveness of MS-OP. Study 2 uses the data of 114 managers from a vignette-based experiment to determine whether S-BCM leads to improved buyer operational and financial performance. Study 2 offers evidence that confirms the positive link between S-BCM and buyer operational and financial performance. The results also suggest that the use of reward power further enhances the association between S-BCM and buyer performance. Using two studies, Essay 2 examines how supply chain power and learning can be related to cyber resilience capability. Study …
Date: August 2022
Creator: Sadeghi, J. Kiarash
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Increasing the Effectiveness of Location-Based Advertising

Location-based ads are defined as any ads that are sent by an identified source to consumers' mobile devices when they are around the advertised product/store. Although mobile ad spending is said to have accounted for 68% of all digital ad spending in 2020, knowledge of how businesses can use mobile and location-based technology to reach their customers effectively is limited. Thus, the purpose of this three-essay format dissertation is to review the literature on LBA and identify the gaps in the literature and attempt to address a few of these gaps in the remaining two essays. The second essay tests an integrated model by examining the effects of the various retailer and consumer-controlled factors on two retail performances. In the third essay, we explore how LBA affects different dimensions of consumer-brand engagement. The results and findings provide important implications for retailers and brands to increase their performances.
Date: August 2022
Creator: Thapa, Sajani
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Dido the Chaste: A Characterization of Dido in Spanish Baroque Pasticcio Opera (open access)

Dido the Chaste: A Characterization of Dido in Spanish Baroque Pasticcio Opera

The Dido myth has evolved and been adapted by many cultures over the centuries. Each Dido was altered to fit the needs of its creator, their society and customs. Despite these variations, every Dido retelling is derived from the Virgilian Dido, historical Dido, or chaste Dido narrative, or a combination of these stories. The pasticcio opera, Ópera armónica al estilo italiano que se intitula Dido y Eneas draws on the general Virgilian plot but emphasizes the chaste Dido narrative. The changes in the plot of Dido y Eneas reflect societal gender norms, theatrical conventions, and historical figures, specifically Queen María Luisa Gabriela, from eighteenth-century Spain. The Dido of Dido y Eneas can be divided into two main personas: Dido the queen and Dido the lover. Her arias, which come from preexisting Italian operas, convey the dramatic text very well. However, no matter what persona Dido portrays, she never fully loses control nor lets her passions rule her actions. Even in the moments before her suicide, her aria, "Punta intrepida," lacks the overt emotionality found in the popular Dido lament made famous by Purcell. This thesis aims to situate Dido y Eneas within the history of the Dido narrative and gender …
Date: August 2022
Creator: Zimmerman, Camila
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Advances to Convolutional Neural Network Architectures for Prediction and Classification with Applications in the First Dimensional Space (open access)

Advances to Convolutional Neural Network Architectures for Prediction and Classification with Applications in the First Dimensional Space

In the vast field of signal processing, machine learning is rapidly expanding its domain into all realms. As a constituent of this expansion, this thesis presents contributive work on advancements in machine learning algorithms by building on the shoulder of giants. The first chapter of this thesis contains enhancements to a CNN (convolutional neural network) for better classification of heartbeat arrhythmia. The network goes through a two stage development, the first being augmentations to the network and the second being the implementation of dropout. Chapter 2 involves the combination of CNN and LSTM (long short term memory) networks for the task of short-term energy use data regression. Exploiting the benefits of two of the most powerful neural networks, a unique, novel neural network is created to effectually predict future energy use. The final section concludes this work with directions for future works.
Date: August 2022
Creator: Kim, Hae Jin
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Influence of Thomas Mann's "Doctor Faustus: The Life of the German Composer Adrian LeverkĂĽhn as Told by a Friend" upon Alfred Schnittke's Compositional Style as seen through His "Fuga for Solo Violin" (1953) (open access)

The Influence of Thomas Mann's "Doctor Faustus: The Life of the German Composer Adrian LeverkĂĽhn as Told by a Friend" upon Alfred Schnittke's Compositional Style as seen through His "Fuga for Solo Violin" (1953)

Alfred Schnittke was a prolific and nuanced musical figure of the twentieth-century, contributing significantly to the fields of musical philosophy and composition. One of his most researched contributions, that bridges both disciplines, is his definition and implementation of the compositional technique, polystylism. His 1971 essay, "Polystylistic Tendencies in Modern Music," served as the first serious discussion of the term, providing a narrower definition, differentiating it from other techniques, and discussing its importance in the oeuvre of twentieth-century artists. Schnittke is also known for his fervent desire to overcome the gap between Ernstmusik (serious music) and Unterhaltung (music for entertainment). This lifelong pursuit, combined with polystylism, lead him to create an eclectic catalogue that championed the ideas it was pioneering. However, there is little research done on the 1947 literary work that served as a creative catalyst to all these ideas: Thomas Mann's Doctor Faustus: The Life of German Composer Adrian Leverkühn as told by a Friend. In contrast to other telling's of the Faust legend, Mann's version features a composer-protagonist, Adrian Leverkühn, who sells his soul for twenty-four years of creative musical-genius. During this time, Leverkühn composes numerous successful works, even developing a new system of musical composition. Mann's telling …
Date: August 2022
Creator: McKamie, Mark Alexander
Object Type: Thesis or Dissertation
System: The UNT Digital Library

"Allegro de Concert," op. 46, by Frédéric Chopin: A Performance Guide

Frédéric Chopin produced a remarkable body of piano works. Even though most of his works are essential repertoire in piano literature, some of them remain less familiar. One such significant work is the Allegro de Concert in A major, op. 46, which was apparently intended to be the first movement of a third piano concerto. Despite the praise the work has received, it is rarely heard, and references to performance are lacking in the scholarly literature. Some reasons include the substantial technical challenges, such as risky skips, trills in double notes, thick harmonic textures, complex passagework, and the perpetual motion. This study provides a performance guide for the Allegro de Concert, looking at various perspectives of an informed musical performance. The historical backstory of the intended third concerto and a detailed form analysis demonstrate that the work has a combined form, incorporating elements of both concerto and sonata-allegro form. The chapter on performance presents the technical issues and a comparative analysis of various editions and arrangements of this work to inspire musical ideas and suggest appropriate solutions to the musical and technical difficulties.
Date: August 2022
Creator: Jeong, Jiyoon
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Tibetan and Western Musical Elements in the Piano Suite "Tibetan Sketches" by Bingyuan Cui (open access)

Tibetan and Western Musical Elements in the Piano Suite "Tibetan Sketches" by Bingyuan Cui

As one of the few piano works with Tibetan folk characteristics, the piano suite Tibetan Sketches composed by Bingyuan Cui presents a vivid depiction of the Tibetan people with colorful sound and considerable imagination. As a Tibetan, I have been greatly honored to research and perform this work and incorporate my understanding into this dissertation. The composer took into account Western composition techniques as well as Eastern music, combining religious and folk musical elements of Chinese ethnic minorities with Western piano techniques to create a wonderful work. This dissertation introduces the characteristics of Tibetan music and analyzes the work, then explores the use of Tibetan elements and the varied styles in the three movements of Tibetan Sketches. Cui uses a large number of Tibetan elements in this work, closely related to the local Tibetan music style in melodies, decorations, harmonies, tone color changes, and performance techniques. Based on the historical background and influence of Western music on the development of Chinese music and some other aspects, a brief description is given of the Eastern and Western music styles in the work. This dissertation introduces my own performance and learning experience when I studied this work, communications and an interview with …
Date: August 2022
Creator: Jiang, Tingyue
Object Type: Thesis or Dissertation
System: The UNT Digital Library
String Playing for a Lifetime: Narratives of Two Adult Amateur String Players (open access)

String Playing for a Lifetime: Narratives of Two Adult Amateur String Players

The purpose of this study was to increase knowledge about the experiences of adult amateur string players. Through narrative inquiry, this study presents the unique stories of two amateur string players who have sustained their active music-making throughout their adult lives. Leaders in music education have promised lifelong music-making and touted it as a benefit of supporting music in schools. This promise is part of vision statements, symposia, advocacy efforts, and guiding documents for the last century. Yet, the most common outcome for students who participate in school music programs is that they quit before they graduate high school, or soon afterward. The idea of school music segueing into lifetime music-making for large numbers of students remains an aspiration and not the outcome. I used narrative inquiry to explore and present the stories of these two players. Their experiences are unique, and it is not appropriate to generalize their narratives to others. However, I hope that by closely examining the experiences they considered impactful in their lives as music students and amateur musicians, music educators can better understand the ways their teaching practices might lead to students' enjoyment of music-making past their student years. Implications for practicing music teachers and …
Date: August 2022
Creator: Flippin, Sam Houston
Object Type: Thesis or Dissertation
System: The UNT Digital Library
"Visceral Data" (open access)

"Visceral Data"

Visceral Data is a short documentary formatted for 360-cinema (commonly referred to as virtual reality or VR) that explores the integration of art and science, and how aesthetically creative treatments of raw data are an engaging way to interpret complex information. With Roger Malina, executive editor of Leonardo, the world's foremost academic journal for the intersections of art, science, and technology, providing a narrative overview of the subject, six art-scientists/science-artists discuss specific pieces of their artistic output to provide examples. As Roger Malina asserts, civilization is "going through an epistemological revolution as deep as the Copernican Revolution," and as we progress further into the 21st century, we will need hybrid professionals working in the arts and sciences to help humanity navigate through the age of big data.
Date: August 2022
Creator: DiFalco, Elaine Celleste
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Development of an Enclosed Evaporation Chamber Utilizing a Fresnel Lens Solar Concentrator

This thesis project investigates the configuration of an enclosed evaporation chamber with the intention of converting seawater into potable freshwater. The evaporation chamber's sole heat source is provided by a Fresnel lens, located above the chamber, which concentrates sunlight onto a 3-inch diameter focal plate built into the core of the chamber. The design of the evaporation chamber is modeled after a solar still and is coupled with a heat exchanger to boost efficiency of the system. The chamber was designed with the objectives of being portable, lightweight, low cost, corrosion resistant, interchangeable, and size convenient with the goal of producing 1 Liter of freshwater per hour of operation. The evaporation chamber consists of two primary components, a core and an attached arrangement of fins, all of which are heated via the Fresnel lens. A consistent intake of 2 grams/second of saltwater enters from the top of the chamber and is then gravity fed across the fins. Fin orientation has been designed to inhibit the flow rate of water within the chamber, maximizing the surface area of contact with the heated fins. The evaporation chamber was modeled through SOLIDWORKS and underwent a physical optimization study to reduce material usage while …
Date: August 2022
Creator: Planz, Bridger T
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Collection of Streaming Content

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation presents findings from a survey of web archiving of streaming services, in the form of published content, metadata, and user interfaces as collected in the Danish Web Archive 2005-2021.
Date: May 24, 2022
Creator: Lenander Aegidius, Andreas & Klindt Myrvoll, Anders
Object Type: Presentation
System: The UNT Digital Library

A Grounded Theory of Information Quality for Web Archives: Dimensions and Applications

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation explores Information Quality (IQ) for web archives using the Grounded Theory (GT) Methodology.
Date: May 24, 2022
Creator: Reyes Ayala, Brenda
Object Type: Presentation
System: The UNT Digital Library

Building a Sustainable Quality Assurance Lifecycle at the Library of Congress

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation shares details of the Library of Congress Web Archiving Team's (WAT) comprehensive quality assurance lifecycle, specifically daily workflows and ones under development.
Date: May 24, 2022
Creator: Thomas, Grace & Lyon, Meghan
Object Type: Presentation
System: The UNT Digital Library

Comparing Access Patterns of Robots and Humans in Web Archives

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation is an extension of a previous study and explores the access patterns of humans and robots in the Internet Archive with the goal of determining which accesses are from humans and which are from bots.
Date: May 24, 2022
Creator: Jayanetti, Himarsha R.; Garg, Kritika; Alam, Sawood; Nelson, Michael L. & Weigle, Michele C.
Object Type: Presentation
System: The UNT Digital Library

Collaborative ART Archive (CARTA)

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation discusses the various goals of CARTA members and the impacts of this work. Collaborative ART Archive (CARTA) is a project managed by the Internet Archive and the New York Art Resources Consortium (NYARC) aimed at capturing and preserving at-risk web-based art materials.
Date: May 25, 2022
Creator: Donovan, Lori; Carruthers, Madeline & Duncan, Sumitra
Object Type: Presentation
System: The UNT Digital Library

The Evolving Treatment of Wayback Machine Evidence by U.S. Federal Courts

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation explores how courts have regarded web archives and presents a review of U.S. federal court cases whose rulings reference the Internet Archive Wayback Machine.
Date: May 24, 2022
Creator: Taylor, Nicholas
Object Type: Presentation
System: The UNT Digital Library

A Crash Course in Web Archiving & Community

Presentation for the IIPC General Assembly and Web Archiving Conference virtually held on May 23-25, 2022. This presentation, part of the panel on Saving Ukrainian Cultural Heritage Online, covers how the project started, traces its development, reflects on key decisions made by organizers, and considers the roles volunteers and institutions play in emergency web archiving.
Date: May 25, 2022
Creator: Dombrowski, Quinn; Kijas, Anna & Majstorovic, Sebastian
Object Type: Presentation
System: The UNT Digital Library