Month

Benefits of Probiotics on Mortality, Growth Performance, Physiological Condition and Gut Histomophology of Juvenile Red Drum (Sciaenops ocellatus)

Results from the present study found for the first time that the use of bacterial strains of Lactobacillus acidophilus, Lactobacillus casei, Bifidobacterium thermophilum, and Enterococcus faecium from the commercial product PrimaLac® had the potential to act as a possible probiotic for juvenile red drum. The addition of PrimaLac® probiotics [whether as a water-soluble probiotic (WSP) or in a probiotic enhanced starter feed (PESF)] reduced mortality (%M), enhanced growth rates (MW, LT, SGR, and DGR), improved feed conversion efficiencies (FCEs), and physical condition factors in the juvenile red drum. Improvement was quantified using external morphological condition indices (MCIs) and blood physiological condition indices (PCIs). Results showed a strong positive relationship between MCIs and PCIs, which suggested that probiotics treated fish were in better health (lower MCIs) with lower fasting blood glucose and lactate levels than control fish. Addition of probiotics also resulted in improved water quality (lower nitrate, nitrite, and ammonia) in the treatment tanks compared to controls. Application of PrimaLac® probiotics on the morphology and histology of three different regions of the intestine (proximal, mid-and distal) improved intestinal length (Li), mass (Mi), and digesta mass (Md). In 5μm histological sections examined for differences among treatments (probiotics vs. controls), five variables …
Date: May 2021
Creator: Busby, Wren Adell
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Engine Running: Essays

Engine Running: Essays is a collection of creative nonfiction that explores, in parts, a persona's distancing from home and self against the backdrop of an increasingly fractured family doing the same. Through a variety of forms, the essays seek to balance themes like loss, self-discovery, and manhood in reflections on the role of childhood memory, the early revelations and experimentation of sexuality, and the carving-out of personal identity in West Texas.
Date: May 2021
Creator: Mason, Chesley Cade
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Object Detection for Aerial View Images: Dataset and Learning Rate (open access)

Object Detection for Aerial View Images: Dataset and Learning Rate

In recent years, deep learning based computer vision technology has developed rapidly. This is not only due to the improvement of computing power, but also due to the emergence of high-quality datasets. The combination of object detectors and drones has great potential in the field of rescue and disaster relief. We created an image dataset specifically for vision applications on drone platforms. The dataset contains 5000 images, and each image is carefully labeled according to the PASCAL VOC standard. This specific dataset will be very important for developing deep learning algorithms for drone applications. In object detection models, loss function plays a vital role. Considering the uneven distribution of large and small objects in the dataset, we propose adjustment coefficients based on the frequencies of objects of different sizes to adjust the loss function, and finally improve the accuracy of the model.
Date: May 2021
Creator: Qi, Yunlong
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Exploring Factors Affecting Public Service Motivation: An Investigation of Public Service Motivation in Saudi Arabia

This research builds on social exchange theory and self-determination theory to better understand the relationships between employee engagement, demographic and personal attributes, and public service motivation (PSM). It hypothesizes that employee engagement and demographic and personal characteristics (education, income, gender, and parents working in civil service) will directly affect PSM. I also hypothesize that education, income, and gender will have an indirect effect and moderate the relationship between employee engagement and PSM. This dissertation uses a quantitative approach to investigate the hypotheses introduced with the conceptual model. This research uses structural equation modeling as a data analysis technique. Based on 704 valid questionnaires distributed to Saudi public employees in Riyadh, Jeddah, Dammam, and Assir, the analysis shows that a higher level of employee engagement will lead to a higher level of public service motivation. It also reveals that a higher level of education will lead to a higher level of PSM.; the hypothesis that income positively affects PSM is not supported. Thus, this study finds that there is no significant relationship between income and PSM. Being female is found to be negatively associated with PSM. Therefore, the hypothesis that females are lower PSM than males is supported. Parents of public …
Date: May 2021
Creator: Alotaibi, Saud G.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Comparative Analysis of the Orchestral and Piano Versions of Finlandia by Jean Sibelius in Relation to His Compositional Style, 1899–1904 (open access)

A Comparative Analysis of the Orchestral and Piano Versions of Finlandia by Jean Sibelius in Relation to His Compositional Style, 1899–1904

While he was composing his important orchestral tone poem Finlandia in 1899–1900, Jean Sibelius (1865–1957) made his own piano arrangement of it. The purpose of this study is to compare the piano arrangement and orchestral version and to see further the similarities with Sibelius's other piano compositions from the same time period (1899-1904). Through this study I have found compositional patterns, which are typical for the composer and defined his composition style for piano during his "Kalevala-Romantic" phase. Sibelius's piano style was characterized as unpianistic and bulky by some. However, through my research I can show that with an analysis of certain harmonic structures, subtle use of pedal and correct voicings, his piano texture is indeed very thoughtful and transparent with a clear focus on counterpoint while remaining pianistic and comfortable to play. In order to fully understand the idiosyncrasies of the two versions of Finlandia, a detailed comparative analysis of the piano and orchestral scores is necessary. For this purpose, I primarily used the printed scores of both the piano and orchestral versions. In addition, the manuscript of the piano version of Finlandia was consulted as an important resource. From the orchestra manuscript, only one page has been found. …
Date: May 2021
Creator: Teppo, Ruusamari
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Faculty Response to Academic Dishonesty in the Classroom at a Four-Year Public Institution (open access)

Faculty Response to Academic Dishonesty in the Classroom at a Four-Year Public Institution

Academic dishonesty is prevalent in institutions of higher education. Faculty are at the forefront of this issue as they are in the classroom with the students. However, faculty may be hesitant to address academic dishonesty for a myriad of reasons. The purpose of this qualitative exploratory case study was to explore how faculty members viewed their roles in addressing academic dishonesty. Study participants were 11 full-time faculty from a Southern University who had taught for at least two years and had experienced academic dishonesty in the classroom. Artifacts were also gathered from three documentary sources. Four major themes emerged from the data: (a) faculty investment in academic integrity, (b) faculty-student relationship impact on interaction, (c) personal values guiding faculty response, and (d) deterrents preventing faculty action. Several implications included the need for: (i) ongoing professional development opportunities for faculty, (ii) the creation of shared ownership and governance of academic integrity between faculty and university leadership; (iii) consistent prevention and enforcement of academic dishonesty according to university guidelines, and (iv) the creation of a partnership between the conduct office and the various faculty departments.
Date: May 2021
Creator: Smith, Laura Trahan
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Performing Controlled Indeterminacy in Leo Brouwer's "Sonata Mitología de las Aguas No. I, para Flauta y Guitarra" (open access)

Performing Controlled Indeterminacy in Leo Brouwer's "Sonata Mitología de las Aguas No. I, para Flauta y Guitarra"

Leo Brouwer's Sonata Mitología de las Aguas No. I for flute and guitar, first published in 2017, has taken its place as an important twenty-first-century addition to the flute and guitar duo repertory. I provide a brief historical context for the work, followed by preparation guides for guitar alone and duo passages. My preparation guides include exercises and rehearsal strategies, focusing on those passages of the work that include controlled indeterminacy. The study of indeterminacy in music is unusual in the pedagogy of the classical guitarist; this leaves guitarists unprepared for dealing with pieces, especially chamber works, that use improvisation or aleatoric music as a primary element. I take a multifaceted approach to facilitate the realization of the indeterminate sections of the work; this includes demonstrations of my traditional music notation transcriptions and other rehearsal strategies and the application of music performance study systems by James Thurmond and Marcel Tabuteau. This document aims to provide guidance to creating an organic, natural aesthetic in the actualization of Brouwer's groundbreaking work.
Date: May 2021
Creator: Rodriguez, Hector Javier
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Prestige as the Highest Ambition: Emerging Research Universities and the National Research University Fund (open access)

Prestige as the Highest Ambition: Emerging Research Universities and the National Research University Fund

In 2009 the Texas legislature created the National Research University Fund (NRUF), intended to encourage a select group of public doctoral universities in the state, known as emerging research universities (ERUs), to increase their institutional status related to academic research by awarding supplemental financial support for meeting specific policy metrics. Efforts to increase the research status of these universities occurred at a time when public financial support remained stagnate and overall institutional costs increased within the higher education sector. This study utilizes a theoretical approach grounded in strategic action fields and employs panel data and a difference in differences statistical technique to analyze the impact that NRUF policy has in assisting ERUs in achieving R1 status, and how this organizational change impacted access to, and the quality of, undergraduate education. Results indicate that the NRUF policy intervention was not statistically significant for any part of the study. These findings suggest that policy interventions do not matter as much as specific institutional characteristics and the overall policy environment. Enrollment and tuition revenue predicted institutional performance related to academic research and graduate education, while also assisting these institutions in maintaining undergraduate academic quality and access. These cultural and material resources at the …
Date: May 2021
Creator: Ryan, Sean Alan
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Exploring the Impacts of COVID-19 on Hotel Booking Intentions: An Application of the Protection Motivation Theory

After the hit of the COVID-19 pandemic, the hotel industry's efforts need to focus on recovering travelers' confidence by introducing new safe and clean programs or seals. However, there is a lack of guidelines regarding which hotel safety/cleaning programs and what communication strategies are more effective when approaching guests. This study aims to address this gap by using a 2 (COVID-19 Message Type: Fear Appeals vs. Hope Appeals) × 2 (Hotel Safety/Cleaning Program Type: Internal vs. Third-Party) between-subject experiment design. Specifically, it applies the protection motivation theory in investigating the effects of different messages (hope vs. fear) along with different types of hotel safety/cleaning programs (internal vs. third-party) on guests' booking intentions. The moderating role of risk propensity was also explored. The data were collected in a public university located south of the U.S. Different ANOVA and MANOVA tests were conducted. The results suggest that hope appeal messages and hotel internal cleaning programs arouse higher booking intentions. When presenting COVID-19 related information provided by hotels, hope appeals represent a better communication strategy. In addition, the coping and threat appraisals showed to be correlated with hotel guests' booking intentions. Moreover, response efficacy was the strongest predictor with a positive correlation, whereas …
Date: May 2021
Creator: Calderon, Araceli Hernandez
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Oklahoma History (open access)

Oklahoma History

Oklahoma History is a collection of poetry that examines the speaker's relationship to and critique of her home state, Oklahoma. The poems navigate race and gender as they intersect with local histories, culture, and religion, which complicates and often contradicts what the speaker is taught through childhood, adolescence, and into adulthood. The creative portion is accompanied by a critical preface which looks at how the poems and other writings of Oklahoma poet Joy Harjo impact the author's writing.
Date: May 2021
Creator: Warren, Sarah
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Exploring Turkish American Fathers: Father Involvement, Father's Perception of Maternal Gatekeeping, Competence, and Conservatism

There has been an increase in the fatherhood studies with minority groups in the United States in the past decades; however, these studies rarely included Turkish American fathers. To the best of the authors knowledge, current study was the first to explore father involvement in relation to fathers' perception of mothers' gate-keeping, fathers' competence as a parent, and their cultural stance as related to conservatism among a sample of Turkish American fathers with children between the ages of 3 to 6 years (n = 103). An exploratory factor analysis was conducted to examine the factor loadings of gate-closing and gate-opening items. The results yielded a two-factor solution with one suppressed item, and two cross-loading items with factor loadings bigger than .32. A path analysis was conducted to determine whether father's competence in relation to gate-closing and gate-opening, and father's conservatism adequately described father involvement through regression paths. The results of the chi-square goodness-of-fit test were not significant, χ2(3) = 1.84, p = .607, suggesting that the model fit the data well. Father's competency significantly predicted father involvement (B = 0.56, SE = .211, p = .008). Gate-closing (B = -30.48, SE = 15.340, p = .047) and gate-opening (B = …
Date: May 2021
Creator: Soyer, Gonca Feyza
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Making Meetings More Meaningful: An Exploration of Meeting Science in Libraries (open access)

Making Meetings More Meaningful: An Exploration of Meeting Science in Libraries

This article adds to the growing body of research in meeting science, explored from a library perspective. The authors investigate the predictors of success for productive meetings, librarian perceptions of effective meeting leadership, and best practices for meeting leadership.
Date: May 12, 2021
Creator: Leuzinger, Julie & Brannon, Sian
Object Type: Article
System: The UNT Digital Library
Southwest Retort, Volume 73, Number 9, May 2021 (open access)

Southwest Retort, Volume 73, Number 9, May 2021

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: May 2021
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library

Let's Git Creative: Using GitLab to Improve the Institutional Repository Workflow at the University of North Texas

Poster examining the use of GitLab by the University of North Texas Libraries' institutional repository. GitLab provided the ability to track and communicate priorities for items submitted to the repository. It was presented at the Texas Conference on Digital Libraries (TCDL) on May 24-26, 2021.
Date: May 24, 2021
Creator: Johnson-Freeman, Whitney R.
Object Type: Poster
System: The UNT Digital Library