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Vincent Ludwig Persichetti's Parable for Solo Flute (Alto or Regular): A Study of Its Compositional Elements: Together with Recitals of Selected Works of Beethoven, Devienne, Handel, Hummel, Kreutzer, and Others

Description: This dissertation focuses on the first Parable of Vincent Ludwig Persichetti, written for alto flute in 1965. Persichetti spent from 1965 to 1986 (almost the last twenty years of his life) composing twenty-four additional Parables for various solo instruments, instrumental combinations, and even one in the form of an opera.
Date: December 1994
Creator: Zoloth, Alan Gary
Partner: UNT Libraries
open access

Interactions of hydrogen with alkali promoted Ru/SiO{sub 2} catalysts: A proton NMR study

Description: Role of H spillover to the silica support was studied using chemisorption; a strongly bound component of spilled over H was found in the silica support which interfered with accurate measurements of active metal sites via volumetric strong H chemisorption. The volumetric chemisorption technique was modified so that measurement times were reduced from 12--36 h to 1 h. The active Ru surface was characterized means of changes in proton spin counts and NMR Knight shifts vs alkali loading. Na, K blo… more
Date: May 10, 1994
Creator: Ozbay, U. D.
Partner: UNT Libraries Government Documents Department
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Pion single charge exchange in three body nuclei at intermediate energies

Description: The purpose of this thesis is to present new experimental information about modifications to the pion-nucleon single charge exchange interaction, {pi}{sup +}n {yields}{pi}{sup 0} p or {pi}{sup {minus}} p {yields} {pi}{sup 0}n, due to the presence of other nucleons. The results of two experimental studies of pion single charge exchange in the three nucleon system near the {triangle}-resonance are presented. Both of these experiments were performed at the Clinton P. Anderson Meson Physics Facilit… more
Date: January 1, 1994
Creator: Dowell, M. L.
Partner: UNT Libraries Government Documents Department
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Transition metal oxides deposited on rhodium and platinum: Surface chemistry and catalysis

Description: The surface chemistry and catalytic reactivity of transition metal oxides deposited on Rh and Pt substrates has been examined in order to establish the role of oxide-metal interactions in influencing catalytic activity. The oxides investigated included titanium oxide (TiOx), vanadium oxide (VOx), iron oxide (FeOx), zirconium oxide (ZrOx), niobium oxide (NbOx), tantalum oxide (TaOx), and tungsten oxide (WOx). The techniques used to characterize the sample included AES, XPS, LEED, TPD, ISS, and S… more
Date: July 1, 1994
Creator: Boffa, A. B.
Partner: UNT Libraries Government Documents Department
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Tonal Perspectives in the Selected Piano Preludes of Shostakovich (Op.34: nos.1, 3, 6, 14, and 24): an Analytical Study

Description: This study is an investigation of tonal structures in selected preludes of Shostakovich's Op.34. Explanations and analytic perspectives provide support of tonality oriented interpretation for the compositions which often appear to be "atonal." Chapter One is divided into (1) historical perspectives of the prelude as form, and (2) Summary of Shostakovich's life and work. Chapter Two contains a historical background of (1) the development of Shostakovich's compositional styles, emphasizing his ea… more
Date: August 1994
Creator: Lee, Tze Fung Alfred
Partner: UNT Libraries
open access

Bal. Pulse = 1'

Description: Thesis written by a student in the UNT Honors College discussing the Gamelan orchestra of Indonesia, its instruments, a musical piece composed in the style, and scanned photographs of the instruments.
Date: Spring 1994
Creator: Murphy, Kevin
Partner: UNT Honors College
open access

An Analysis of Texas Special Education Due Process Hearings from September 1, 1983, to September 1, 1992: Implications for the Administration of Special Education Programs

Description: The purpose of this study was to assess the effects of selected characteristics on the outcomes of those special education due process hearings brought forth in the state of Texas from September 1, 1983, to September 1, 1992. A further purpose was to determine if district characteristics of size or location affect the likelihood of a district's becoming involved in a special education due process hearing. Data for the study was collected for all special education due process hearings conducted … more
Date: August 1994
Creator: Webb, Paula J. (Paula Jean)
Partner: UNT Libraries
open access

The low temperature properties of (Dy{sub 1-x}Er{sub x})Ni{sub 2} alloys

Description: The study of rare earth magnetic properties is undertaken to further the understanding of critical phenomena and the mechanism of magnetic ordering in solids. There is a great variety of magnetic ordering observed in the rare earth compounds, thus providing an insight to phenomena such as heat capacity, magnetostriction and crystal fields. Studies began on the magnetic properties of the rare earths and their compounds in the 1950`s.
Date: July 27, 1994
Creator: Gailloux, M.
Partner: UNT Libraries Government Documents Department
open access

Synthesis, structure and redox reactivity of Co₃(CO)₆(μ₂-η²,η¹-C(Ph)C=C(PPH₂)C(O)SC(O)) (μ₂-PPh₂)

Description: The tricobalt cluster PhCCo₃(CO)₉ (1) reacts with the bidentate phosphine ligand 2,3-bis(diphenylphosphino)maleic thioanhydride (bta) with added Me₃NO to yield PhCCo₃(CO)₇(bta) (2), which upon heating overnight yields Co₃(CO)₆(μ₂-η²,η¹-C(Ph)C=C(PPH₂)C(O)SC(O)) (μ₂-PPh₂) (3). Cluster (3) has been isolated and characterized by FT-IR and ³¹P NMR spectroscopy. Structural determination of the cluster has been demonstrated by X-ray diffraction analysis. Cluster (3) is analogous to the cluster synthes… more
Date: May 1994
Creator: Muñoz, Trinidad
Partner: UNT Libraries
open access

Z + {gamma} cross-section measurement, {sigma}*BR(Z + {gamma}), in the electron channel for p{bar p} collisions at {radical}s = 1.8 TeV, and limits for the ZZ{gamma} and Z{gamma}{gamma} anomalous couplings

Description: The Z + {gamma} cross-section x branching ratio in the electron channel has been measured using the inclusive Z data sample from the CDF 1988--1989 collider run, for which the total integrated luminosity was 4.05 {plus_minus} 0.28 pb{sup {minus}1}. Two Z{gamma} candidates are observed from central photon events with {Delta}R/{sub {gamma}} > 0.7 and E{sub t}{sup {gamma}} > 5.0 GeV. From these events the {sigma} * BR(Z + {gamma}) is measured and compared with SM predictions: {sigma} * BR(Z + {gam… more
Date: February 1, 1994
Creator: Roach-Bellino, M.
Partner: UNT Libraries Government Documents Department
open access

Low-frequency noise in high-{Tc} superconductor Josephson junctions, SQUIDs, and magnetometers

Description: Design and performance of high-T{sub c} dc superconducting quantum interference devices (SQUEDs), junctions that comprise them, and magnetometers made from them are described, with attention to sources of 1/f noise. Biepitaxial junctions are found to have large levels of critical current fluctuations which make them unsuitable for low-noise SQUIDS; this suggests a poorly connected interface at the grain boundary junction. SQUIDs from bicrystal junctions have levels of critical current noise con… more
Date: May 1, 1994
Creator: Miklich, A. H.
Partner: UNT Libraries Government Documents Department
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Photodissociation and photoionization of organosulfur radicals

Description: The dynamics of S({sup 3}P{sub 2,1,0}, {sup 1}D{sub 2}) production from the 193 nm photodissociation of CH{sub 3}SCH{sub 3}, H{sub 2}S and CH{sub 3}SH have been studied using 2 + 1 resonance-enhanced multiphoton ionization (REMPI) techniques. The 193 nm photodissociation cross sections for the formation of S from CH{sub 3}S and HS initially prepared in the photodissociation of CH{sub 3}SCH{sub 3} and H{sub 2}S are estimated to be 1 {times} 10{sup {minus}18} and 1.1 {times} 10{sup {minus}18} cm{… more
Date: May 27, 1994
Creator: Hsu, Chia-Wei
Partner: UNT Libraries Government Documents Department
open access

Structural oxidation state studies of the manganese cluster in the oxygen evolving complex of photosystem II

Description: X-ray absorption spectroscopy (XAS) was performed on Photosystem II (PSII)-enriched membranes prepared from spinach to explore: (1) the correlation between structure and magnetic spin state of the Mn cluster in the oxygen evolving complex (OEC) in the S{sub 2} state; and (2) the oxidation state changes of the Mn cluster in the flash-induced S-states. The structure of the Mn cluster in the S{sub 2} state with the g{approx}4 electron paramagnetic resonance (EPR) signal (S{sub 2}-g4 state) was com… more
Date: November 1, 1994
Creator: Liang, W.
Partner: UNT Libraries Government Documents Department
open access

Selenophene transition metal complexes

Description: This research shows that selenophene transition metal complexes have a chemistry that is similar to their thiophene analogs. Selenophene coordination has been demonstrated and confirmed by molecular structure in both the {eta}{sup 5}- and the {eta}{sup 1}(Se)-coordination modes. The reaction chemistry of selenophene complexes closely resembles that of the analogous thiophene complexes. One major difference, however, is that selenophene is a better donor ligand than thiophene making the selenoph… more
Date: July 27, 1994
Creator: White, C. J.
Partner: UNT Libraries Government Documents Department
open access

Using Steepest Descent to Find Energy-Minimizing Maps Satisfying Nonlinear Constraints

Description: The method of steepest descent is applied to a nonlinearly constrained optimization problem which arises in the study of liquid crystals. Let Ω denote the region bounded by two coaxial cylinders of height 1 with the outer cylinder having radius 1 and the inner having radius ρ. The problem is to find a mapping, u, from Ω into R^3 which agrees with a given function v on the surfaces of the cylinders and minimizes the energy function over the set of functions in the Sobolev space H^(1,2)(Ω; R^3) h… more
Date: August 1994
Creator: Garza, Javier, 1965-
Partner: UNT Libraries
open access

Leaks in nuclear grade high efficiency aerosol filters

Description: Nuclear grade high efficiency aerosol filters, also known as high efficiency particulate air (HEPA) filters, are commonly used in air cleaning systems for removal of hazardous aerosols. Performance of the filter units is important in assuring health and environmental protection. The filter units are constructed from pleated packs of fiberglass filter media sealed into rigid frames. Results of previous studies on such filter units indicate that their performance may not be completely predicted b… more
Date: July 1, 1994
Creator: Scripsick, R. C.
Partner: UNT Libraries Government Documents Department
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Quasiparticle energy studies of bulk semiconductors, surfaces and nanotubes

Description: Effects of many-body effects on electronic excitation energies (quasiparticle band structure) of these materials are explored. GW approximation, including local field effects, for self-energy operator is used to calculate quasi-particle energies. The newly discovered carbon nanotubes are studied; structural stability and band structures are calculated. BN nanotubes are also studied, and their stability is predicted. Unexpected electronic features are predicted for both systems. Filling of carbo… more
Date: December 1, 1994
Creator: Blase, X.F.
Partner: UNT Libraries Government Documents Department
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Reciprocal Influences of Temperature and Copper on Fathead Minnows (Pimephales promelas)

Description: Acclimation temperature had a significant effect on the lethality of copper to fathead minnows in replicated 96-hour lethality tests. Lowest median lethal copper concentrations (LC50) were recorded at 12 and 22°C, with LC50s at 5 and 32°C at least 140 μg/1 higher. This research found LC50 copper concentrations in the 300 to 500 μg/1 range and a polynomial relationship between LC50s and acclimation temperature. Following a 24-hour exposure to three sublethal concentrations of copper, critical th… more
Date: May 1994
Creator: Richards, Virginia L. (Virginia Lynn)
Partner: UNT Libraries
open access

The Wealth Effect of the Risk-Based Capital Regulation on the Commercial Banking Industry

Description: The purpose of this study is to examine the wealth effect of the Risk-Based Capital (RBC) regulation on the U.S. commercial banking industry. The RBC plan was first proposed in January 1986, and its final form was announced on July 11, 1988. This plan resulted from dissatisfaction with the old capital regulation, which did not account for asset risk and off-balance sheet activities. The present study hypothesizes that the new regulation restricted bank optimal behavior and, therefore, adversely… more
Date: August 1994
Creator: Zoubi, Marwan M. Sharif (Marwan Mohd Sharif)
Partner: UNT Libraries
open access

Actinide cation-cation complexes

Description: The +5 oxidation state of U, Np, Pu, and Am is a linear dioxo cation (AnO{sub 2}{sup +}) with a formal charge of +1. These cations form complexes with a variety of other cations, including actinide cations. Other oxidation states of actinides do not form these cation-cation complexes with any cation other than AnO{sub 2}{sup +}; therefore, cation-cation complexes indicate something unique about AnO{sub 2}{sup +} cations compared to actinide cations in general. The first cation-cation complex, N… more
Date: December 1994
Creator: Stoyer, N. J. & Seaborg, G. T.
Partner: UNT Libraries Government Documents Department
open access

Continuous, Nowhere-Differentiable Functions with no Finite or Infinite One-Sided Derivative Anywhere

Description: In this paper, we study continuous functions with no finite or infinite one-sided derivative anywhere. In 1925, A. S. Beskovitch published an example of such a function. Since then we call them Beskovitch functions. This construction is presented in chapter 2, The example was simple enough to clear the doubts about the existence of Besicovitch functions. In 1932, S. Saks showed that the set of Besicovitch functions is only a meager set in C[0,1]. Thus the Baire category method for showing the e… more
Date: December 1994
Creator: Lee, Jae S. (Jae Seung)
Partner: UNT Libraries
open access

Efficient biased random bit generation for parallel processing

Description: A lattice gas automaton was implemented on a massively parallel machine (the BBN TC2000) and a vector supercomputer (the CRAY C90). The automaton models Burgers equation {rho}t + {rho}{rho}{sub x} = {nu}{rho}{sub xx} in 1 dimension. The lattice gas evolves by advecting and colliding pseudo-particles on a 1-dimensional, periodic grid. The specific rules for colliding particles are stochastic in nature and require the generation of many billions of random numbers to create the random bits necessa… more
Date: September 28, 1994
Creator: Slone, D.M.
Partner: UNT Libraries Government Documents Department
open access

A photoemission study of the diamond and the single crystal C{sub 60}

Description: This report studied the elctronic structure of diamond (100) and diamond/metal interface and C{sub 60}, using angle-resolved and core level photoemission. The C(100)-(2X1) surface electronic structure was studied using both core level and angle resolved valence band photoemission spectroscopy. The surface component of the C 1s core level spectrum agrees with theoretical existence of only symmetrical dimers. In the case of metal/diamond interfaces, core level and valence photoelectron spectrosco… more
Date: March 1, 1994
Creator: Wu, Jin
Partner: UNT Libraries Government Documents Department
open access

Charge State Dependence of M-Shell X-Ray Production in 67Ho by 2-12 MeV Carbon Ions

Description: The charge state dependence of M-shell x-ray production cross sections of 67HO bombarded by 2-12 MeV carbon ions with and without K-vacancies are reported. The experiment was performed using an NEC 9SDH-2 tandem accelerator at the Ion Beam Modification and Analysis Laboratory of the University of North Texas. The high charge state carbon ions were produced by a post-accelerator stripping gas cell. Ultra-clean holmium targets were used in ion-atom collision to generate M-shell x rays at energies… more
Date: August 1994
Creator: Sun, Hsueh-Li
Partner: UNT Libraries
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