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Closed-form expressions for the magnetic fields of rectangular and circular finite-length solenoids and current loops

Description: This article discusses closed-form expressions for the magnetic fields produced by rectangular- and circular-shaped finite-length solenoids and current loops. The closed-form expression for the magnetic field of a rectangular-shaped finite-length solenoid is derived using the Biot–Savart law. Closed-form expressions for the magnetic fields of solenoids and current loops can be used to avoid approximations in analytical models and may reduce computation time in computer simulations.
Date: June 15, 2020
Creator: Hampton, S.; Lane, R. A.; Hedlof, R. M.; Phillips, R. E. & Ordonez, Carlos A.
Partner: UNT College of Arts and Sciences

Wesley J. Thompson (1947-2019)

Description: The article is a memorial to Wesley J. Thompson (1947-2019) and highlights his contributions to the studies of neuromuscular synapses and glial cells. Thompson graduated from North Texas State University (now University of North Texas) with Bachelor of Science and Master of Arts degree, and he went on to build a meaningful career that spanned the globe. He will be remembered not only as a great scientist but also as a great mentor and friend.
Date: June 12, 2020
Creator: Lee, Young il & Rimer, Mendell
Partner: University of North Texas

Automating Authority Control Procedures

Description: This paper is a part of the presentation, "Automating the Authority Control Process," for the Innovative Users Group Conference in 2020. The presentation introduces ideas on how to handle authority control using a variety of tools, both paid and free. The paper details the specific procedures described in the presentation.
Date: May 26, 2020
Creator: Wolf, Stacey
Partner: UNT Libraries

Automating the Authority Control Process

Description: This presentation introduces ideas on how to handle authority control using a variety of tools, both paid and free. The presenter describes how their library handles authority control, describe vendors and programs, and demonstrate a few automated authority control processes using MarcEdit, Sierra, OCLC and a few other programs.
Date: May 26, 2020
Creator: Wolf, Stacey
Partner: UNT Libraries

Automating the Authority Control Process

Description: Video recording of the presentation, "Automating the Authority Control Process," for the Innovative Users Group Conference in 2020. The presentation introduces ideas on how to handle authority control using a variety of tools, both paid and free. The presenter describes how their library handles authority control, describe vendors and programs, and demonstrate a few automated authority control processes using MarcEdit, Sierra, OCLC and a few other programs.
Date: May 26, 2020
Creator: Wolf, Stacey
Partner: UNT Libraries

IIIF and the UNT Digital Collections

Description: Presentation for the International Image Interoperability Framework (IIIF) Archives Community Group virtual meeting held on May 12, 2020. The presentation is a demonstration of the IIIF by the University of North Texas' digital collections.
Date: May 12, 2020
Creator: Hicks, William & McIntosh, Marcia
Partner: UNT Libraries Digital Projects Unit

Political Science Curriculum Map

Description: This dataset provides a data analysis of how student learning objective from PSCI syllabi map to threshold concepts from the ACRL Framework for Information Literacy for Higher Education (2016) and the AAC&U Information Literacy Value Rubric (2013). The data includes non-core course for courses offered from the Fall 2017 semester to the Spring 2020 semester. This data analysis is conducted every three years. This curriculum map excludes core course previously as they were examined in the UNT Libraries Core Curriculum Map.
Date: May 11, 2020
Creator: Henson, Brea
Partner: UNT Libraries

To Co-Author or Not?

Description: This poster focuses on how to approach collaborative research. Learn how to choose team members, facilitate collaboration and organize all the elements of a project to create a successful publication or presentation. Also included are administrative responsibilities, thoughts on handling problems, examples of delineating responsibilities. It was presented at The Exchange an Association for Library Collections and Technical Services (ALCTS)/Library and Information Technology Association (LITA)/Library Leadership and Management (LLAMA) Collaboration held virtually on May 4, 6, & 8, 2020.
Date: May 6, 2020
Creator: Sassen, Catherine & Brannon, Sian
Partner: UNT Libraries

Transparency on Journal Pricing - Make a List!

Description: This poster discusses the creation and value of UNT Libraries Serials Transparency List that contains the subscription pricing information they receive from publishers. The list promotes transparency in journal pricing and informed decision-making in collection development. It was presented at The Exchange an Association for Library Collections and Technical Services (ALCTS)/Library and Information Technology Association (LITA)/Library Leadership and Management (LLAMA) Collaboration held virtually on May 4, 6, & 8, 2020.
Date: May 6, 2020
Creator: Enoch, Todd; Castillo, Darin & Brannon, Sian
Partner: UNT Libraries

Activation of Small Molecules by Transition Metal Complexes via Computational Methods

Description: The first study project is based on modeling Earth abundant 3d transition-metal methoxide complexes with potentially redox-noninnocent ligands for methane C–H bond activation to form methanol (LnM-OMe + CH4 → LnM–Me + CH3OH). Three types of complex consisting of tridentate pincer terpyridine-like ligands, and different first-row transition metals (M = Ti, V, Cr, Mn, Fe, Co, Ni, and Cu) were modeled to elucidate the reaction mechanism as well as the effect of the metal identity on the thermodynamics and kinetics of a methane activation reaction. The calculations showed that the d electron count of the metal is a more significant factor than the metal's formal charge in controlling the thermodynamics and kinetics of C–H activation. These researches suggest that late 3d-metal methoxide complexes that favor σ-bond metathesis pathways for methane activation will yield lower barriers for C–H activation, and are more profitable catalyst for future studies. Second, subsequently, on the basis of the first project, density functional theory is used to analyze methane C−H activation by neutral and cationic nickel-methoxide complexes. This study identifies strategies to further lower the barriers for methane C−H activation through evaluation of supporting ligand modifications, solvent polarity, overall charge of complex, metal identity and counterion effects. Overall, neutral low coordinate complexes (e.g. bipyridine) are calculated to have lower activation barriers than the cationic complexes. For both neutral and cationic complexes, the methane C−H activation proceed via a σ-bond metathesis rather than an oxidative addition/reductive elimination pathway. Neutralizing the cationic catalyst models by a counterion, BF4-, has a considerable impact on reducing the methane activation barrier free energy. Third, theoretical studies were performed to explore the effects of appended s-block metal ion crown ethers upon the redox properties of nitridomanganese(V) salen complexes, [(salen)MnV(N)(Mn+-crown ether)]n+, where, M = Na+, K+, Ba2+, Sr2+ for 1Na, 1K, 1Ba, 1Sr ...
Date: May 2020
Creator: Najafian, Ahmad
Partner: UNT Libraries

The Administration of Unemployment Relief by the State of Texas during the Great Depression, 1929-1941

Description: During the Great Depression, for the first time in its history, the federal government provided relief to the unemployed and destitute through myriad New Deal agencies. This dissertation examines how "general relief" (direct or "make-work") from federal programs—primarily the Emergency Relief and Construction Act (ERCA) and Federal Emergency Relief Administration (FERA)—was acquired and administered by the government of Texas through state administrative agencies. These agencies included the Chambers of Commerce (1932-1933), Unofficial Texas Relief Commission (1933), Texas Rehabilitation and Relief Commission (1933), Official Texas Relief Commission (1933-1934), Texas Relief Commission Division of the State Board of Control (1934), and the Department of Public Welfare (1939). Overall, the effective administration of general relief in the Lone Star State was undermined by a political ideology that persisted from, and was embodied by, the "Redeemer" Constitution of 1876.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: May 2020
Creator: Park, David B
Partner: UNT Libraries

Adolescent Self-Theories of Singing Ability within the Choral Hierarchy

Description: The purpose of this study was to explore adolescent self-views of singing ability through both implicit theories and self-concept meaning systems. A secondary purpose of this study was to examine these self-views specifically in the context of a choral hierarchy. Using a researcher-designed survey instrument, I gathered data from middle- and high-school students currently enrolled in a choir program organized in a hierarchical structure. I analyzed descriptive statistics of survey responses to items designed to measure implicit theories of singing ability, singing self-concept, and goal orientation. I also examined differences among participants by ensemble placement in implicit theory and self-concept scores, correlation between implicit theory and self-concept, and whether implicit theory, self-concept, goal orientation, or current enrollment could predict future enrollment decisions. In addition to these quantitative measures, I coded open-ended responses to two failure scenarios and examined participant responses by ensemble and gender. Both implicit theory and self-concept scores were higher for participants at the top of the choral hierarchy than at the bottom. Open-ended responses, however, did not align with the implicit theory scale and a number of students presented a false growth mindset. Open-ended responses also indicated that failure scenarios were likely to result in an altered view of the self and shame in placement in an ensemble at the bottom of the choral hierarchy. The means scores for participants in the middle- and high-school ensembles in both implicit theory and self-concept were significantly different, with participants in the high-school ensembles having higher scores in both constructs. Implicit theory and self-concept were significantly related, and self-concept, goal orientation, and current enrollment significantly predicted future enrollment decisions.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: May 2020
Creator: Adams, Kari A.
Partner: UNT Libraries

Analysis of Interrelationships between Climate Change and Cotton Yield in Texas High Plains

Description: The Texas High Plains produces the most substantial amount of cotton in Texas. The region is a semi-arid area with limited precipitation, and it is, therefore, susceptible to climate change. Cotton production in the Texas High Plains is mostly dependent on irrigation to increase yield. The overall goal of this research was to study the interrelationships between climate change and cotton yield using correlation analysis and also to study how climate has changed in the region using trend analysis. A three-decade data (1987-2017) was analyzed to establish the relationship between climate change and cotton and also to determine how climate has changed in the area over the last 30 years. The research used precipitation and temperature data to assess climate change.The results of this research showed that annual mean temperature has lesser impacts on cotton yield, and the correlation between annual precipitation and cotton yield is insignificant. It also found out that high rates of temperature at the boll opening stage of cotton growth results in decreased cotton yield and that at the boll development and boll opening stages, precipitation is needed. Again, the research indicated that, on average, there had been a significant increase in temperature, but precipitation trends are insignificant. About 60% of cotton acreage in the area is irrigated. Therefore the research also found out that increasing trends of cotton yield may contribute to the decline of groundwater in the area.
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Date: May 2020
Creator: Sarbeng, Lorenda
Partner: UNT Libraries

An Analysis of the Flypaper and Fungibility Effects of Intergovernmental Revenue on Municipal Operating and Capital Budgets

Description: The flypaper effect states that grants-in-aid increases public spending more than a comparable increase in personal income. If aid increases spending, then there is the possibility that it displaces own-source revenue or a portion of the aid itself is used to meet other priorities of governments, fungibility. Different local government structures have the tendency to prioritize either the operating or capital budget. Empirical evidence shows that federal and state grants have different flypaper effect. While fungible state aid is allocated to the operating budget, that of federal goes to the capital budget. Council-manager and mayor-council form of governments do not allocate fungible intergovernmental aid differently between the capital and operating budgets.
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Date: May 2020
Creator: Boadu, Bernard
Partner: UNT Libraries

An Analytical Survey of Hendrik Hofmeyr's Compositions for Solo Saxophone

Description: Hendrik Hofmeyr is considered one of the most important and influential living composers in South Africa. His music for solo saxophone is not well-known in the classical saxophone repertoire. His four works for solo saxophone (Concerto per saxofono contralto e orchestra, Concerto per saxofono baritono e orchestra, Partita canonica, and Necromancer) are substantial and terrific repertoire for the instrument. This study is intended to inform a saxophone performer's understanding of these compositions through analysis of form, melodic, and harmonic content relevant to performance; and, demonstrate through example the conclusions determined by the analysis about apparent compositional techniques in the music.
Date: May 2020
Creator: Davis, Michael James
Partner: UNT Libraries

Anxiety and Trumpet Performance: An Exploratory Study

Description: The purpose of this document is to investigate how trumpet students at the University of North Texas experience music performance anxiety and to find out how professors prepare students for controlling music performance anxiety experiences. The interviewees were ten undergraduates and ten graduate students, as well as three trumpet professors who teach at the University of North Texas. The questionnaire responses of the student interviewees were examined, and literature is provided that address the most common performance related psychological and physiological symptoms experienced by the trumpet students. Effective and healthy strategies are discussed that were offered by the trumpet professors, and suggestions are made regarding potential benefits and detriments of trumpet performance anxiety.
Date: May 2020
Creator: Ruggiero, Nicole Marie
Partner: UNT Libraries

Anxiety in the Workplace: A Study of Different Anxiety Relief Methods for Hotel Employees

Description: There is a lack of anxiety relief methods used in the hospitality workplace. This study examines the effectiveness of two forms of anxiety relief through four different methods. The data collection took place in classroom environments at the University of North Texas and the University of New Orleans, both of which are located in southern USA. The independent variables are the recovery method, the mediator variables are restorativeness and emotional improvement, and the dependent variables are negative job affects, positive job affects, turnover intention, and job commitment. Professors were asked for some time during their lecture to conduct the experiment in a classroom environment during the students' class time. Eight classes were visited, with each class being exposed to a designated anxiety relief method. The anxiety relief methods consisted of using a virtual reality headset with sound, virtual reality headset without sound, nature pictures with sound, and nature pictures without sound. Results of 206 usable surveys indicated virtual reality recovery method evoked higher levels of restorativeness than picture recovery method. Restorativeness partially mediated the effects of positive job affects and job commitment. lastly, emotional improvement partially mediated the effects of negative job affects, positive job affects, and turnover intention.
Date: May 2020
Creator: Carrillo, Cindy
Partner: UNT Libraries

Assessing Agricultural and Hydrologic Potential of Ancestral Puebloan Community Centers using Open Source Data

Description: The Pueblo III period marks a critical shift in settlement location of Ancestral Puebloan people within the Mesa Verde region. Community centers during the Pueblo I and Pueblo II periods were built on mesa tops, whereas canyon-rims and alcoves became the preferred settlement location during the Pueblo III period. Beginning in the Pueblo I period, community centers consisted of linear roomblock villages. By the late Pueblo II period great house community centers influenced by the Chaco culture system spanned the Mesa Verde region. The Pueblo III period hallmarks the transition to canyon-rim villages and cliff dwellings. The location of these Pueblo III centers is thought to be related to the need for a defensive position on the landscape, and access to water sources. This shift in settlement locations undoubtedly led to change in the access to resources, such as water, arable farmland, and wild food plants and game. This study aims to evaluate whether the change in community center location impacted the accessibility to arable farmland and water sources immediately available to Ancestral Puebloan people throughout time. Specifically, several variables related to farming potential and hydrologic potential, including soil type, soil moisture, elevation, cropland suitability, distance to water sources, drainage density, and hydrogeologic units were evaluated. Nine community centers within the McElmo drainage area in southwestern Colorado ranging in age from the Pueblo II to Pueblo III periods were included in this study.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: May 2020
Creator: Zarzycka, Sandra Elzbieta
Partner: UNT Libraries

Assessing the Self-Determination Inventory: Validity for Students with Disabilities and Typically Developing Students

Description: Students' self-determination (SD) can positively influence their ability to make choices in planning for their future. The current study is a preliminary validity study on the most recent 21-item version of Shogren and Wehmeyer's Self-Determination Inventory: Student Report (SDI-SR). The SDI-SR was administered to 316 students (ages 13-22) and results were examined with exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). Results of the EFA on a 7-factor solution (TLI = 0.97; RMSEA = 0.04; SRMR = 0.02) aligned with the theoretical basis for the SDI:SR as well as results for the 7-factor CFA using simulated data (TLI = 0.913; RMSEA = 0.047; SRMR = 0.072 and CFI = 0.931); however, the CFA 7-factor solution results on the present study data were slightly lower than what is considered acceptable model fit (TLI = 0.883; RMSEA = 0.04; RMSR = 0.047). These results combined suggest that theory-based 7-factor solution does capture seven latent constructs in this data. A CFA was also conducted with a 5-factor structure based on factor loading from an EFA using the present research data resulting in a better model fit (TLI = 0.912; RMSEA = .075; SRMR = 0.046; and CFI = 0.940) as well as a CFA run with the simulated data resulting in an even better fit (TLI = 0.952; RMSEA = 0.040; SRMR = 0.064; and CFI = 0.967) than the 7-factor solutions. It appears the current study results aligned with five of the latent factors of SD.
Date: May 2020
Creator: Nix, Susan Michele
Partner: UNT Libraries

Atomic Layer Deposition of H-BN(0001) on Transition Metal Substrates, and In Situ XPS Study of Carbonate Removal from Lithium Garnet Surfaces

Description: The direct epitaxial growth of multilayer BN by atomic layer deposition is of critical significance forfo two-dimensional device applications. X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED) demonstrate layer-by-layer BN epitaxy on two different substrates. One substrate was a monolayer of RuO2(110) formed on a Ru(0001) substrate, the other was an atomically clean Ni(111) single crystal. Growth was accomplished atomic layer deposition (ALD) cycles of BCl3/NH3 at 600 K substrate temperature and subsequent annealing in ultrahigh vacuum (UHV). This yielded stoichiometric BN layers, and an average BN film thickness linearly proportional to the number of BCl3/NH3 cycles. The BN(0001)/RuO2(110) interface had negligible charge transfer or band bending as indicated by XPS and LEED data indicate a 30° rotation between the coincident BN and oxide lattices. The atomic layer epitaxy of BN on an oxide surface suggests new routes to the direct growth and integration of graphene and BN with industrially important substrates, including Si(100). XPS and LEED indicated epitaxial deposition of h-BN(0001) on the Ni(111) single crystal by ALD, and subsequent epitaxially aligned graphene was deposited by chemical vapor deposition (CVD) of ethylene at 1000 K. Direct multilayer, in situ growth of h-BN on magnetic substrates such as Ni is important for spintronic device applications. Solid-state electrolytes (SSEs) are of significant interest for their promise as lithium-ion conducting materials but are prone to degradation due to lithium carbonate formation on the surface upon exposure to atmosphere, adversely impacting Li ion conduction. In situ XPS monitored changes in the composition of the SSE Li garnet (Li6.5La3Zr1.5Ta0.5O12, LLZTaO) upon annealing in UHV and upon Ar+ ion sputtering. Trends in core level spectra demonstrate that binding energy (BE) calibration of the Li 1s at 56.4 eV, yields a more consistent interpretation of results than the more commonly used standard of the ...
Date: May 2020
Creator: Jones, Jessica C.
Partner: UNT Libraries

Australian Mateship and Imperialistic Encounters with the United States in the Vietnam War

Description: This thesis attempts to prove the significance of the relationship between the United States and Australia, and how their similar cultures and experiences assisted creating that shared bond throughout the twentieth century. Chapter 2 examines the effects of the Cold War on both the United States and Australia, as well as their growing relationship during that period. There is some backtracking chronologically in order to make connections to important historical legacies such as the ANZAC Legend and settlement on the periphery of their respective societies. Then the first half of chapter 3 delves into the Vietnam War by examining the interactions of the American support unit, the 11th Combat Aviation Battalion, a helicopter unit that includes transports and gunships. Afterwards, the latter half of chapter 3 examines the Australians' after-action reports to better understand their tactical and operational methods. Finally, chapter 4 provides an overview of Australian and American interactions between the advisers and the Vietnamese, as well as their attitudes towards the end of the war and the withdrawal from Vietnam. The conclusion summarizes the significance of the thesis by reemphasizing the significance of US-Australian interactions in the twentieth century and the importance of continued studies on this topic between US and Australian historians.
Date: May 2020
Creator: Wos, Nathaniel
Partner: UNT Libraries