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A.B. Marx's Concept of Rondo and Sonata: A Critical Evaluation of His Explanations of Musical Form

Description: The third volume of A.B. Marx's theory treatise Die Lehre von der musikalischen Komposition is discussed. His definitions of rondo and sonata formal types are demonstrated in the first chapter in addition to the manner of their derivation through a developmental process originating in the Liedform. Musical examples chosen by Marx are examined in chapter two. These examples, taken from Mozart's and Beethoven's piano works, are evaluated in relation to Marx's definitions of the various types of f… more
Date: July 1993
Creator: Lang, Adelheid K.
Partner: UNT Libraries
open access

Synthesis and characterization of novel ternary and quaternary reduced molybdenum oxides

Description: This thesis is divided into 8 sections: synthesis and characterization (char.) of Ba{sub 3}Mo{sub 18}O{sub 28} (an oligomer with four traps edge-sharing Mo octahedra); synthesis and char. of K{sub x}M{sub y}Mo{sub 14}O{sub 22} (M=Sn, Pb, Sr) (oligomers with three traps edge-sharing Mo octahedra); synthesis and char. of K{sub 0.19}Ba{sub 3.81}Mo{sub 22}O{sub 34} (an oligomer with five traps edge-sharing Mo octahedra); synthesis and char. of Ti{sub 0.31}Fe{sub 1.69}Mo{sub 4}O{sub 7} (a material c… more
Date: July 1, 1993
Creator: Schimek, G. L.
Partner: UNT Libraries Government Documents Department
open access

Chemically modified polymeric resins for solid-phase extraction and group separation prior to analysis by liquid or gas chromatography

Description: Polystyrene divinylbenzene was modified by acetyl, sulfonic acid, and quaternary ammonium groups. A resin functionalized with an acetyl group was impregnated in a PTFE membrane and used to extract and concentrate phenolic compounds from aqueous samples. The acetyl group created a surface easily wetted, making it an efficient adsorbent for polar compounds in water. The membrane stabilized the resin bed. Partially sulfonated high surface area resins are used to extract and group separate an aqueo… more
Date: July 1, 1993
Creator: Schmidt, L. W.
Partner: UNT Libraries Government Documents Department
open access

Optimization of separation and detection schemes for DNA with pulsed field slab gel and capillary electrophoresis

Description: The purpose of the Human Genome Project is outlined followed by a discussion of electrophoresis in slab gels and capillaries and its application to deoxyribonucleic acid (DNA). Techniques used to modify electroosmotic flow in capillaries are addressed. Several separation and detection schemes for DNA via gel and capillary electrophoresis are described. Emphasis is placed on the elucidation of DNA fragment size in real time and shortening separation times to approximate real time monitoring. The… more
Date: July 1, 1993
Creator: McGregor, D. A.
Partner: UNT Libraries Government Documents Department
open access

A measurement of the ({tau}) polarization at the Z resonance with the DELPHI detector at LEP

Description: The polarization of {tau} leptons produced in the reaction e{sup +}e{sup {minus}} {yields} {tau}{sup +}{tau}{sup {minus}} near the peak of the Z{degree} resonance has been measured using a sample of 24904 {tau}{sup +}{tau}{sup {minus}} events, with an estimated background of 1.5%. We have selected 4562 {tau} {yields} e{nu}{bar {nu}} 2218 {tau} {yields} {pi}{nu} and 5133 {tau} {yields} {rho}{nu} candidates. The mean value obtained is P{sub {tau}} = {minus}0.176 {plus_minus} 0.029. This correspon… more
Date: July 1, 1993
Creator: Wong Chan, A.
Partner: UNT Libraries Government Documents Department
open access

Interstitially stabilized phases in the zirconium-nickel system

Description: Addition of nonmetal interstitial atoms to Zr-Ni compounds has resulted in several new phases. A single-crystal x-ray study was carried out for Zr{sub 3}NiO. Zr{sub 4}Ni{sub 2}O is a high- temperature phase, forming in samples annealed at 1250 C. Huekel band calculations led to prediction and confirmation of additional phases in more electron rich systems. Other phases studied by XRD are Zr{sub 6}Ni{sub 4}Ti{sub 2}O{sub 0.6}, Nb{sub 6}Ni{sub 6}O, and Nb{sub 6}Ni{sub 4}Ta{sub 2}O{sub 2}. Phases … more
Date: July 1, 1993
Creator: MacKay, R. A.
Partner: UNT Libraries Government Documents Department
open access

Current-potential characteristics of electrochemical systems

Description: This dissertation contains investigations in three distinct areas. Chapters 1 and 2 provide an analysis of the effects of electromagnetic phenomena during the initial stages of cell discharge. Chapter 1 includes the solution to Maxwell`s equations for the penetration of the axial component of an electric field into an infinitely long cylindrical conductor. Chapter 2 contains the analysis of the conductor included in a radial circuit. Chapter 3 provides a complete description of the equations th… more
Date: July 1, 1993
Creator: Battaglia, V. S.
Partner: UNT Libraries Government Documents Department
open access

The effect of simplifying the building description on the numerical modeling of its thermal performance

Description: A thermal building simulation program is a numerical model that calculates the response of the building envelopes to weather and human activity, simulates dynamic heating and cooling loads, and heating and cooling distribution systems, and models building equipment operation. The scope of the research is to supply the users of such programs with information about the dangers and benefits of simplifying the input to their models. The Introduction describes the advantages of modeling the heat tra… more
Date: July 1, 1993
Creator: Stetiu, C.
Partner: UNT Libraries Government Documents Department
open access

Chemically modified polymeric resins for separation of cations, organic acids, and small polar moleculea by high performance liquid chromatography

Description: This thesis is divided into 4 parts: a review, ion chromatography of metal cations on carboxylic resins, separation of hydrophilic organic acids and small polar compounds on macroporous resin columns, and use of eluent modifiers for liquid chromatographic separation of carboxylic acids using conductivity detection.
Date: July 1, 1993
Creator: Morris, J. B.
Partner: UNT Libraries Government Documents Department
open access

Methyl quantum tunneling and nitrogen-14 NQR NMR studies using a SQUID magnetic resonance spectrometer

Description: Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR) techniques have been very successful in obtaining molecular conformation and dynamics information. Unfortunately, standard NMR and NQR spectrometers are unable to adequately detect resonances below a few megahertz due to the frequency dependent sensitivity of their Faraday coil detectors. For this reason a new spectrometer with a dc SQUID (Superconducting Quantum Interference Device) detector, which has no such frequency de… more
Date: July 1, 1993
Creator: Black, B. E.
Partner: UNT Libraries Government Documents Department
open access

Performance analysis of memory hierachies in high performance systems

Description: This thesis studies memory bandwidth as a performance predictor of programs. The focus of this work is on computationally intensive programs. These programs are the most likely to access large amounts of data, stressing the memory system. Computationally intensive programs are also likely to use highly optimizing compilers to produce the fastest executables possible. Methods to reduce the amount of data traffic by increasing the average number of references to each item while it resides in the … more
Date: July 1, 1993
Creator: Yogesh, A.
Partner: UNT Libraries Government Documents Department
open access

Investigations Into Ultraviolet Matrix-Assisted Laser Desorption

Description: Matrix-assisted laser desorption (MALD) is a technique for converting large biomolecules into gas phase ions. Some characteristics of the commonly used uv matrices are determined. Solubilities in methanol range from 0.1 to 0.5 M. Solid phase absorption spectra are found to be similar to solution, but slightly red-shifted. Acoustic and quartz crystal microbalance signals are investigated as possible means of uv-MALD quantitation. Evidence for the existence of desorption thresholds is presented. … more
Date: July 1, 1993
Creator: Heise, T. W.
Partner: UNT Libraries Government Documents Department
open access

Synthesis, rheology and forming of Y-Ba-Cu-O ceramics

Description: A chemical synthesis route is discussed which results in a low- temperature precursor to Y-Ba-Cu-O ceramics; it is based on use of molten Ba(OH){sub 2}{center_dot}8H{sub 2}O flux. Two different chemical systems have been examined; the first one, based on nitrate salts, has been demonstrated to be a viable precursor material for tape casting and extrusion; the second, made from acetate salts, has been used for powder synthesis and extrusion. Rheology of pastes shows that their flow may be fit to… more
Date: July 1, 1993
Creator: Green, T. M.
Partner: UNT Libraries Government Documents Department
open access

Parallel hierarchical radiosity rendering

Description: In this dissertation, the step-by-step development of a scalable parallel hierarchical radiosity renderer is documented. First, a new look is taken at the traditional radiosity equation, and a new form is presented in which the matrix of linear system coefficients is transformed into a symmetric matrix, thereby simplifying the problem and enabling a new solution technique to be applied. Next, the state-of-the-art hierarchical radiosity methods are examined for their suitability to parallel impl… more
Date: July 1, 1993
Creator: Carter, M.
Partner: UNT Libraries Government Documents Department
open access

Double rotation NMR studies of zeolites and aluminophosphate molecular sieves

Description: Goal is to study the organization and structures of guest atoms and molecules and their reactions on internal surfaces within pores of zeolites and aluminophosphate molecular sieves. {sup 27}Al and {sup 23}Na double rotation NMR (DOR) is used since it removes the anisotropic broadening in NMR spectra of quadrupolar nuclei, thus increasing resolution. This work concentrates on probing aluminum framework atoms in aluminophosphate molecular sieves and sodium extra framework cations in porous alumi… more
Date: July 1, 1993
Creator: Jelinek, R.
Partner: UNT Libraries Government Documents Department
open access

Geometric structures of thin film: Pt on Pd(110) and NiO on Ni(100)

Description: This thesis is divided into 3 papers: dynamical low-energy electron- diffraction investigation of lateral displacements in topmost layer of Pd(110); determination of (1{times}1) and (1{times}2) structures of Pt thin films on Pd(110) by dynamical low-energy electron-diffraction analysis; and structural determination of a NiO(111) film on Ni(100) by dynamical low-energy electron-diffraction analysis.
Date: July 1, 1993
Creator: Warren, O. L.
Partner: UNT Libraries Government Documents Department
open access

Instrumental development of novel detection and separation methods for capillary electrophoresis

Description: After a general introduction, this thesis is divided into 3 parts: indirect fluorescence detection of sugars separated by capillary zone electrophoresis with visible laser excitation, absorption detection in capillary electrophoresis by fluorescence energy transfer, and increased selectivity for electrochromatography by dynamic ion exchange.
Date: July 1, 1993
Creator: Garner, T.
Partner: UNT Libraries Government Documents Department
open access

Computer modeling on neutron radiography

Description: This report neutron radiography measuring methods and the neutron radiography model.
Date: July 1993
Creator: Groth, Troy
Partner: UNT Libraries Government Documents Department
open access

Dynamic ray tracing and its application in triangulated media

Description: Hale and Cohen (1991) developed software to generate two-dimensional computer models of complex geology. Their method uses a triangulation technique designed to support efficient and accurate computation of seismic wavefields for models of the earth`s interior. Subsequently, Hale (1991) used this triangulation approach to perform dynamic ray tracing and create synthetic seismograms based on the method of Gaussian beams. Here, I extend this methodology to allow an increased variety of ray-theore… more
Date: July 1993
Creator: Rueger, A.
Partner: UNT Libraries Government Documents Department
open access

Water-enhanced solvation of organics

Description: Water-enhanced solvation (WES) was explored for Lewis acid solutes in Lewis base organic solvents, to develop cheap extract regeneration processes. WES for solid solutes was determined from ratios of solubilities of solutes in water-sat. and low-water solvent; both were determined from solid-liquid equilibrium. Vapor-headspace analysis was used to determine solute activity coefficients as function of organic phase water concentration. WES magnitudes of volatile solutes were normalized, set equa… more
Date: July 1, 1993
Creator: Lee, J. H.
Partner: UNT Libraries Government Documents Department
open access

RHEED studies of the nucleation, growth, and mobility of Ag atoms on the Si(111)7 x 7 surface

Description: The low temperature and flux dependent growth of ultrathin Ag films on the Si(111)7x7 surface is studied with Reflection High-Energy Electron Diffraction (RHEED). The grazing incidence geometry of RHEED allows for an incident molecular beam normal to the surface, and makes it an ideal surface probe for studying ultrathin film growth in real time. Short-lived oscillations in the diffracted intensity are observed during Ag deposition at 150 K, indicating quasi-layer-by-layer growth mediated by ad… more
Date: July 1, 1993
Creator: Roos, Kelly Ryan
Partner: UNT Libraries Government Documents Department
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