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open access

Barriers and Connections, A Dichotomy

Description: I planned to explore the concept of the dichotomy of barriers and connections further. The works I planned to produce would incorporate a variety of printing techniques, drawing, and conceptual development. Each technique and method allowed for my perception to speak in a slightly different voice. The use of these multiple techniques would allow me to explore fully the complexity of barriers and connections in a manner more comprehensive than the one technique alone.
Date: August 1998
Creator: Wilson, Nichelle L.
Partner: UNT Libraries
open access

Protrapment

Description: It was my intention to create pieces that seem to be both entrapping and protective at the same time. I hope that, as the viewer attempts to interpret each piece, there will be a shift back and forth from one to the other until both sides are accepted and a balance is found.
Date: August 1998
Creator: Herring, Mancel K.
Partner: UNT Libraries
open access

Body Conscious: Pushing the Boundaries of Traditional Western Adornment

Description: The focus of the problem was to challenge the more traditional. Western approaches to jewelry as adornment in respect to areas such as placement and scale. Approaching adornment as sculptural forms interacting with the human body could possibly challenge the individual's awareness of jewelry as wearable art. This approach brought up the issue of using the human body as a pedestal for adornment.
Date: May 1998
Creator: DeRuiter, Margaret A.
Partner: UNT Libraries
open access

The Visual Perception of Body Language in Sculpture

Description: My work attempted to examine the emotional and psychological relationships between humans and the relationship of a human being with their inner self. I adopted the human figure as a potentially successful means of expressing these relationships. The language or symbolism I used in my work was derived directly from body language. This universal language is direct and immediate. Body language, posture, attitude, and tension of the figure are primary perceptions observed by the viewer. The immedi… more
Date: May 1998
Creator: Sayago, Maria Sara
Partner: UNT Libraries
open access

Chair-Woman

Description: As the Chair-Woman series has progressed, I have explored the various means to enhance its interpretation. I have determined that materials such as wood and fabric result in a more intimate reading than bronze. However, I have not explored how scale and proximity to other objects will affect the reading. The questions I am seeking to resolve relate to possibilities for expanding the meaning and significance in the Chair-Woman series.
Date: August 1998
Creator: Weaver, Melanie L.
Partner: UNT Libraries
open access

Presentation and Preparation: A Survey of Functional Forms

Description: While I worked, I made a number of pieces that followed a common theme, each relating to the piece made before and after. This way of working revealed new possibilities for expression. During this particular body of work, I explored a specific series of forms that could be used in the preparation and presentation of food and drink.
Date: May 1998
Creator: Herbst, Frederic
Partner: UNT Libraries
open access

A Successful Union Between Functional and Decorative Pottery

Description: The goal of this study was to construct a body of work encompassing a broad range of wheel thrown functional pots that are accented with hand built additions. I produced a total of forty pieces developed from four forms representing a respective increase in scale. I addressed technical and aesthetic issues during the process. These included glaze combinations, variations of established hand built additions, surface decoration, and form/shape manipulation.
Date: May 1998
Creator: Peck, Douglas E.
Partner: UNT Libraries
open access

Construction of Effective Electromagnetic Currents for Two-Body Quasipotential Equations

Description: A systematic algebraic approach for the construction of effective electro-magnetic currents consistent with relativistic two-body quasipotential equations is presented. This approach generalizes the Mandelstam formalism and applies it to a generic quasipotential reduction method. The use of Ward-Takahashi identities for the effective currents guarantees conservation of current matrix elements involving any combination of bound and scattering states. This approach is shown to reproduce previous … more
Date: September 1, 1998
Creator: Krioukov, Dmitri
Partner: UNT Libraries Government Documents Department
open access

A study of tearing modes via electron cyclotron emission from tokamak plasmas

Description: This thesis studies several tearing mode problems from both theoretical and experimental points of view. A major part of this thesis is to demonstrate that Electron Cyclotron Emission (ECE) is an excellent diagnostic for studying an MHD mode structure and its properties in a tokamak plasma. It is shown that an MHD mode can be detected from the electron temperature fluctuations measured by ECE. The amplitude and phase profiles of the fluctuations contain detailed information about the mode struc… more
Date: July 1, 1998
Creator: Ren, C.
Partner: UNT Libraries Government Documents Department
open access

Time resolved studies of bond activation by organometallic complexes

Description: In 1971, Jetz and Graham discovered that the silicon-hydrogen bond in silanes could be broken under mild photochemical conditions in the presence of certain transition metal carbonyls. Such reactions fall within the class of oxidative addition. A decade later, similar reactivity was discovered in alkanes. In these cases a C-H bond in non-functionalized alkanes was broken through the oxidative addition of Cp*Ir(H){sub 2}L (Cp* = (CH{sub 3}){sub 5}C{sub 5}, L = PPh{sub 3}, Ph = C{sub 6}H{sub 5}) … more
Date: May 1, 1998
Creator: Wilkens, M. J.
Partner: UNT Libraries Government Documents Department
open access

Ultrafast studies of organometallic photochemistry: The mechanism of carbon-hydrogen bond activation in solution

Description: When certain organometallic compounds are photoexcited in room temperature alkane solution, they are able to break or activate the C-H bonds of the solvent. Understanding this potentially practical reaction requires a detailed knowledge of the entire reaction mechanism. Because of the dynamic nature of chemical reactions, time-resolved spectroscopy is commonly employed to follow the important events that take place as reactants are converted to products. For the organometallic reactions examine… more
Date: May 1, 1998
Creator: Bromberg, S.E.
Partner: UNT Libraries Government Documents Department
open access

Zintl cluster chemistry in the alkali-metal-gallium systems

Description: Previous research into the alkali-metal-gallium systems has revealed a large variety of networked gallium deltahedra. The clusters are analogues to borane clusters and follow the same electronic requirements of 2n+2 skeletal electrons for closo-deltahedra. This work has focused on compounds that do not follow the typical electron counting rules. The first isolated gallium cluster was found in Cs{sub 8}Ga{sub 11}. The geometry of the Ga{sub 11}{sup 7{minus}} unit is not deltahedral but can be de… more
Date: March 27, 1998
Creator: Henning, R.
Partner: UNT Libraries Government Documents Department
open access

Process modeling of plutonium conversion and MOX fabrication for plutonium disposition

Description: Two processes are currently under consideration for the disposition of 35 MT of surplus plutonium through its conversion into fuel for power production. These processes are the ARIES process, by which plutonium metal is converted into a powdered oxide form, and MOX fuel fabrication, where the oxide powder is combined with uranium oxide powder to form ceramic fuel. This study was undertaken to determine the optimal size for both facilities, whereby the 35 MT of plutonium metal will be converted … more
Date: October 1, 1998
Creator: Schwartz, K. L.
Partner: UNT Libraries Government Documents Department
open access

Time resolved infrared studies of C-H bond activation by organometallics

Description: This work describes how step-scan Fourier Transform Infrared spectroscopy and visible and near infrared ultrafast lasers have been applied to the study of the photochemical activation of C-H bonds in organometallic systems, which allow for the selective breaking of C-H bonds in alkanes. The author has established the photochemical mechanism of C-H activation by Tp{sup *}Rh(CO){sub 2}(Tp{sup *} = HB-Pz{sup *}{sub 3}, Pz = 3,5-dimethylpyrazolyl) in alkane solution. The initially formed monocarbon… more
Date: June 1, 1998
Creator: Asplund, Matthew Charles
Partner: UNT Libraries Government Documents Department
open access

Measurement of isotope separation factors in the palladium-hydrogen system using a thermistor technique

Description: The range of available data on separation factors in the palladium-hydrogen/deuterium system has been extended. A matched pair of glass-coated bead thermistors was used to measure gas phase compositions. The compositions of the input gas--assumed also to be the solid phase composition--were measured independently be mass spectrometry as being within 0.5 mole% of the values used to calibrate the thermistors. This assumption is based on the fact that > 99% of the input gas is absorbed into the so… more
Date: May 1998
Creator: Ortiz, T. M.
Partner: UNT Libraries Government Documents Department
open access

The influence of surface topography on the forming friction of automotive aluminum sheet

Description: Interest in utilizing aluminum alloys in automobiles has increased in recent years as a result of the desire to lower automobile weight and, consequently, increase fuel economy. While aluminum alloy use in cast parts has increased, outer body panel applications are still being investigated. The industry is interested in improving the formability of these sheet alloys by a combination of alloy design and processing. A different avenue of improving the formability of these alloys may be through p… more
Date: May 1, 1998
Creator: Kramer, P. A.
Partner: UNT Libraries Government Documents Department
open access

Interfacial characterization and analytical applications of chemically-modified surfaces

Description: The goal of this work is to explore several new strategies and approaches to the surface modification and the microscopic characterization of interfaces in the areas mainly targeting sensor technologies that are of interest to environmental control or monitoring, and scanning probe microscopies techniques that can monitor interfacial chemical reactions in real time. Centered on the main theme, four specific topics are presented as four chapters in this dissertation following the general introdu… more
Date: February 23, 1998
Creator: Wang, J.
Partner: UNT Libraries Government Documents Department
open access

Measurement of time dependent B{sub d}{sup 0} {bar B}{sub d}{sup 0} mixing parameter using opposite side lepton and D* meson in p{bar p} collisions at {radical}s = 1.8 TeV

Description: This thesis presents the results from the investigation of time dependent B{sub d}{sup 0} {bar B}{sub d}{sup 0} mixing in B {yields} lepton X, B{sub d}{sup 0} {yields} D*{sup -} {yields} {bar D}{sup 0} {pi}{sup -}, {bar D}{sup 0} {yields} K{sup +} {pi}{sup -} channel in p{bar p} collisions at {radical}s = 1.8 TeV using 110 pb{sup -1} data collected with the CDF detector at the Fermilab Tevatron Collider. The {bar D}{sup 0} vertex is reconstructed. The B{sub d}{sup 0} decay length is estimated u… more
Date: January 13, 1998
Creator: Vandenbrink, S.C.
Partner: UNT Libraries Government Documents Department
open access

Processing of R-Ba-Cu-O superconductors

Description: Precipitation processes were developed to introduce second phases as flux pinning centers in Gd-Ba-Cu-O and Nd-Ba-Cu-O superconductors. In Gd-Ba-Cu-O, precipitation is caused by the decrease of the upper solubility limit of Gd{sub 1+x}Ba{sub 2{minus}x}Cu{sub 3}O{sub 7} solid solution (Gd123ss) in low oxygen partial pressure. Processing of supersaturated Gd{sub 1.2}Ba{sub 1.8}Cu{sub 3}O{sub 7} in low oxygen partial pressure can produce dispersed second phases. Gd211 is formed as a separate phase… more
Date: February 23, 1998
Creator: Wu, H.
Partner: UNT Libraries Government Documents Department
open access

Controlling fluctuations and transport in the reversed field pinch with edge current drive and plasma biasing

Description: Two techniques are employed in the Madison Symmetric Torus (MST) to test and control different aspects of fluctuation induced transport in the Reversed Field Pinch (RFP). Auxiliary edge currents are driven along the magnetic field to modify magnetic fluctuations, and the particle and energy transport associated with them. In addition, strong edge flows are produced by plasma biasing. Their effect on electrostatic fluctuations and the associated particle losses is studied. Both techniques are ac… more
Date: September 1, 1998
Creator: Craig, D.J.G.
Partner: UNT Libraries Government Documents Department
open access

A proper time dependent measurement of Delta M {sub D} using jet charge and soft lepton flavor tagging

Description: This thesis presents a proper time dependent measurement of the B{sup 0}{sub d} mixing frequency {Delta}M{sub d} using jet charge and soft lepton flavor tagging in p - {anti p} collisions at {radical}s = 1.8 TeV. The measurement uses the inclusive e and {mu} trigger data of the CDF detector from an integrated luminosity of 91 pb{sub -1}. The proper time at decay is measured from a partial reconstruction of the B associated with the trigger lepton. The measurement of {Delta}M{sub d} yields {Delt… more
Date: August 1, 1998
Partner: UNT Libraries Government Documents Department
open access

Density equalizing map projections (cartograms) in public health applications

Description: In studying geographic disease distributions, one normally compares rates among arbitrarily defined geographic subareas (e.g. census tracts), thereby sacrificing some of the geographic detail of the original data. The sparser the data, the larger the subareas must be in order to calculate stable rates. This dilemma is avoided with the technique of Density Equalizing Map Projections (DEMP){copyright}. Boundaries of geographic subregions are adjusted to equalize population density over the entire… more
Date: May 1, 1998
Creator: Merrill, D.W.
Partner: UNT Libraries Government Documents Department
open access

RHEED studies of vicinal Si(111) surfaces and Ag films grown on Si(111)

Description: Reflection high energy electron diffraction (RHEED) was used to study the growth of silver films and the evolution of step structures on the silicon (111) surface. Silver films were deposited by molecular beam epitaxy onto the Si(111) 7 x 7 surface. Films deposited below room temperature showed RHEED intensity oscillation whose quality improved with decreasing temperature. RHEED oscillations were also improved by the application of an initial burst in the deposition flux. Such improvement and t… more
Date: February 23, 1998
Creator: Stanley, M. K.
Partner: UNT Libraries Government Documents Department
open access

{sup 99}Tc bioassay by inductively coupled plasma mass spectrometry (ICP-MS)

Description: A means of analyzing {sup 99}Tc in urine by inductively coupled plasma mass spectrometry (ICP-MS) has been developed. Historically, {sup 99}Tc analysis was based on the radiometric detection of the 293 keV E{sub Max} beta decay product by liquid scintillation or gas flow proportional counting. In a urine matrix, the analysis of{sup 99}Tc is plagued with many difficulties using conventional radiometric methods. Difficulties originate during chemical separation due to the volatile nature of Tc{su… more
Date: May 1, 1998
Creator: Lewis, L. A.
Partner: UNT Libraries Government Documents Department
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