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Mercado de Fort Worth: Issues and Opportunities

Description: The Mercado de Fort Worth is a commercial area located between downtown Fort Worth and the "stockyards" entertainment district in a Hispanic neighborhood. Many of the buildings are vacant and in need of renovation. To promote area development, the City of Fort Worth has encouraged property owners to create a market area of Mexican-theme restaurants and shops. Property owners have expressed concern about potential returns on renovation investments. This study provides property owners with inform… more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: August 1999
Creator: Hernandez, Gustavo
Partner: UNT Libraries
open access

Photoelectric Emission Measurements for CVD Grown Polycrystalline Diamond Films

Description: We examined CVD grown polycrystalline diamond films having different methane concentrations to detect defects and study the possible correlation between the methane concentration used during the growth process and the defect density. SEM and Raman results show that the amorphous and sp2 carbon content of the films increases with methane concentration. Furthermore, photoelectric emission from diamond is confirmed to be a two-photon process, hence the electrons are emitted from normally unoccupie… more
Date: August 1999
Creator: Hassan, Tarek
Partner: UNT Libraries
open access

Search for the Higgs Boson and Technicolor Particles in p anti-p Colisions at sqrt(s) = 1.8 TeV

Description: In the Standard Model (SM) of the elementary particles, the interactions among the known fundamental fermions (leptons and quarks) are mediated through gauge bosons which obey the symmetry: SU(3) {circle_times} SU(2) {circle_times} U(1). More precisely, the electroweak interaction [4-6] is described by a gauge symmetry SU(2) {circle_times} U(1) which is broken spontaneously. The electroweak symmetry breaking is implemented by the introduction of a complex scalar Higgs field which has a non-zero… more
Date: November 1, 1999
Creator: Cortabitarte, Rocio Vilar & /Cantabria U., Santander
Partner: UNT Libraries Government Documents Department
open access

Measurement of the deuteron elastic structure functions at large momentum transfers

Description: The cross section for elastic electron-deuteron scattering has been measured using the Hall A Facility of Jefferson Laboratory. Scattered electrons and recoiling deuterons were detected in coincidence in the two 4 GeV/c High Resolution Spectrometers (HRS) of Hall A. The deuteron elastic structure functions A(Q{sup 2}) and B(Q{sup 2}) have been extracted from these data. Results for the measurement of A(Q{sup 2}) in the range of 0.7 ≤ Q{sup 2} ≤ 6.0 (GeV/c){sup 2} are reported. Results for the m… more
Date: August 1, 1999
Creator: McCormick, Kathy
Partner: UNT Libraries Government Documents Department
open access

Study of Quasielastic 1p-shell proton Knockout in the {sup 16}O (e,e'p) reaction at Q{sup 2}=0.8 (GeV/c){sup 2}

Description: Coincidence cross sections and the structure functions R{sub L+TT},#2; R{sub T} and R{sub LT} have been obtained for the quasielastic #2;#3;{sup 16}O(#7;e,#2; e'p)#8; reaction with the proton knocked out from the #2;1p{sub 1/2}#2;#2;#4; and #2;1p{sub 3/2}#5;#2;#4; states in perpendicular kinematics. The nominal energy transfer #3;{omega} was 439#11; MeV#4; the nominal Q{sup 2}#4; was 0.8 (#7;GeV/#14;c){sup 2}#8;#4; and the kinetic energy of knocked-#15;out proton was 427#3;#16; MeV. The data wa… more
Date: June 1, 1999
Creator: Gao, Juncai
Partner: UNT Libraries Government Documents Department
open access

Metamorphosis and Transformations with Modular Forms

Description: The metamorphosis and transformation of forms as metaphors continued to be the focus of my work. The use of modular forms with lightweight materials increased mass and volume in my work. The reconstructing and reassembling of sculptures formed with modules was an excellent vehicle for the content of metamorphosis and transformation. The focus of this problem was to create a series of multi-media art pieces that were each composed of a number of modules.
Date: August 1999
Creator: Yu, Hui-Ling
Partner: UNT Libraries
open access

A study of the {sup 16}O (e, e'p) reaction at deep missing energies

Description: The {sup 16}O(e,e'p)#8; reaction was studied in the #6;first physics experiment performed at Jefferson lab Hall A. In the quasielastic region cross sections were measured for both quasi#11;parallel and perpendicular kinematics at q = 1000 MeV and #2;{omega} = 445#14;#14;#15; MeV. From the data acquired in quasi#11;parallel kinematics#4; longitudinal and transverse response functions#4; R{sub L} and R{sub T} were separated for E{sub miss} < 60 MeV. The perpendicular kinematics data were used to … more
Date: February 1, 1999
Creator: Liyanage, Nilanga
Partner: UNT Libraries Government Documents Department
open access

Measurement of the Electric and Magnetic Elastic Structure Functions of the Deuteron at Large Momentum Transfers

Description: The deuteron elastic structure functions, A(Q{sup 2}) and B(Q{sup 2}), have been extracted from cross section measurements of elastic electron-deuteron scattering in coincidence using the Continuous Electron Beam Accelerator and Hall A Facilities of Jefferson Laboratory. Incident electrons were scattered off a high-power cryogenic deuterium target. Scattered electrons and recoil deuterons were detected in the two High Resolution Spectrometers of Hall A. A(Q{sup 2}) was extracted from forward an… more
Date: October 1, 1999
Creator: Suleiman, Riad
Partner: UNT Libraries Government Documents Department
open access

Space and the Unexpected

Description: I intend to explore various canvas sizes and many formal issues, focusing on space and the application of paint are paramount in my work. I used closely cropped photographs to aid in this study and my exploration addressed the following questions: 1) How does the speed of execution affect the spontaneity and authority of the piece? 2) How important is the unexpected for the success of my painting in regards to formal issues?
Date: May 1999
Creator: Fortson, Joey
Partner: UNT Libraries
open access

Breathing Life into the Reductive Format

Description: a. How does the use of different materials such as string, screen, fabric or wire personalize the work? b. How does the addition of subtly recognizable imagery change the reductive field? c. How do processes such as wrapping, printing, dripping, and other techniques infer meaning? d. How does the choice of color and scale affect the work?
Date: May 1999
Creator: Smith, Charlotte D.
Partner: UNT Libraries
open access

Patterns and Evolution

Description: My interest in the patterns of nature and culture has led me on a long journey through studies of math, sciences, and religions culminating in my current studies in art. Continuing my inquiry into processes of human perception and conception of time. My intention was to incorporate the "process" aspect of the printmaking medium into the final work by creating hybrid works that would take the "print" out of its traditional two-dimensional form. Finally, I planned to utilize the "multiple" aspect… more
Date: May 1999
Creator: Lewis, John E.
Partner: UNT Libraries
open access

The Sculptural Book: An Exploration of Form in Conjunction With the Elements of Design

Description: My premise was the marriage of two forms, book and sculpture. My goal was to determine if these two unique types of work could be joined as one. In each oth the proposed works, I focused on an element of design as well as the challenges present when works are produced for a particular space (the Cora Stafford Gallery).
Date: May 1999
Creator: Herbst, Alicia
Partner: UNT Libraries
open access

Single- and multi-photon ionization studies of organosulfur species

Description: Accurate ionization energies (IE`s) for molecular species are used for prediction of chemical reactivity and are of fundamental importance to chemists. The IE of a gaseous molecule can be determined routinely in a photoionization or a photoelectron experiment. IE determinations made in conventional photoionization and photoelectron studies have uncertainties in the range of 3--100 meV (25--250 cm{sup {minus}1}). In the past decade, the most exciting development in the field of photoionization a… more
Date: February 12, 1999
Creator: Cheung, Y. S.
Partner: UNT Libraries Government Documents Department
open access

The interplay of long-range magnetic order and single-ion anisotropy in rare earth nickel germanides

Description: This dissertation is concerned with the interplay of long-range order and anisotropy in the tetragonal RNi{sub 2}Ge{sub 2} (R = rare earth) family of compounds. Microscopic magnetic structures were studied using both neutron and x-ray resonant exchange scattering (XRES) techniques. The magnetic structures of Tb, Dy, Eu and Gd members have been determined using high-quality single-crystal samples. This work has correlated a strong Fermi surface nesting to the magnetic ordering in the RNi{sub 2}G… more
Date: May 10, 1999
Creator: Islam, Z.
Partner: UNT Libraries Government Documents Department
open access

Search for the B{sub c} meson in hadronic Z{sup 0} decays using the OPAL detector at LEP

Description: A search for decays of the B{sub c} meson was performed using data collected from 1990--1995 with the OPAL detector on or near the Z{sup 0} peak at LEP. The decay channels B{sub c}{sup +} {r_arrow} J/{psi}{pi}{sup +}, B{sub c}{sup +} {r_arrow} J/{psi}a{sub 1}{sup +} and B{sub c}{sup +} {r_arrow} J/{psi}{ell}{sup +}{nu} were investigated, where {ell} denotes an electron or a muon. Two candidates are observed in the mode B{sub c}{sup +} {r_arrow} J/{psi}{pi}{sup +}, with an estimated background o… more
Date: January 1, 1999
Creator: Herndon, M.F.
Partner: UNT Libraries Government Documents Department
open access

In situ vibrational spectroscopic investigation of C{sub 4} hydrocarbon selective oxidation over vanadium-phosphorus-oxide catalysts

Description: n-Butane selective oxidation over the VPO catalyst to maleic anhydride is the first and only commercialized process of light alkane selective oxidation. The mechanism of this reaction is still not well known despite over twenty years of extensive studies, which can partially be attributed to the extreme difficulties to characterize catalytic reactions real-time under typical reaction conditions. In situ spectroscopic characterization techniques such as Infrared spectroscopy and laser Raman spec… more
Date: May 10, 1999
Creator: Xue, Z.Y.
Partner: UNT Libraries Government Documents Department
open access

Inductively coupled plasma mass spectrometry for stable isotope metabolic tracer studies of living systems

Description: This dissertation focuses on the development of methods for stable isotope metabolic tracer studies in living systems using inductively coupled plasma single and dual quadrupole mass spectrometers. Sub-nanogram per gram levels of molybdenum (Mo) from human blood plasma are isolated by the use of anion exchange alumina microcolumns. Million-fold more concentrated spectral and matrix interferences such as sodium, chloride, sulfate, phosphate, etc. in the blood constituents are removed from the an… more
Date: May 10, 1999
Creator: Luong, E.
Partner: UNT Libraries Government Documents Department
open access

Calibration of laser ablation inductively coupled plasma mass spectrometry using dried solution aerosols for the quantitative analysis of solid samples

Description: Inductively coupled plasma mass spectrometry (ICP-MS) has become the method of choice for elemental and isotopic analysis. Several factors contribute to its success. Modern instruments are capable of routine analysis at part per trillion levels with relative detection limits in part per quadrillion levels. Sensitivities in these instruments can be as high as 200 million counts per second per part per million with linear dynamic ranges up to eight orders of magnitude. With standards for only a f… more
Date: February 12, 1999
Creator: Leach, J.
Partner: UNT Libraries Government Documents Department
open access

Capillary electrophoresis separation of neutral organic compounds, pharmaceutical drugs, proteins and peptides, enantiomers, and anions

Description: Addition of a novel anionic surfactant, namely lauryl polyoxyethylene sulfate, to an aqueous-acetonitrile electrolyte makes it possible to separate nonionic organic compounds by capillary electrophoresis. Separation is based on differences in the association between analytes and the surfactant. Highly hydrophobic compounds such as polyaromatic hydrocarbons are well separated by this new surfactant. Migration times of analytes can be readily changed over an unusually large range by varying the a… more
Date: February 12, 1999
Creator: Ding, W.L.
Partner: UNT Libraries Government Documents Department
open access

Automation and integration of multiplexed on-line sample preparation with capillary electrophoresis for DNA sequencing

Description: The purpose of this research is to develop a multiplexed sample processing system in conjunction with multiplexed capillary electrophoresis for high-throughput DNA sequencing. The concept from DNA template to called bases was first demonstrated with a manually operated single capillary system. Later, an automated microfluidic system with 8 channels based on the same principle was successfully constructed. The instrument automatically processes 8 templates through reaction, purification, denatur… more
Date: March 31, 1999
Creator: Tan, H.
Partner: UNT Libraries Government Documents Department
open access

Methods development for separation of inorganic anions, organic acids and bases, and neutral organic compounds by ion chromatography and capillary electrophoresis

Description: A novel anion-exchange resin containing three amine groups was prepared by reaction of a chloromethylated polystyrene-divinylbenzene (PS-DVB) resin with diethylenetriamine. After being protonated by contact with an aqueous acid, this resin can be used for ion chromatographic separation of anions. The charge on the resins can be varied from +1 to +3 by changing the mobile phase pH. The selectivity of the new ion exchangers for various inorganic anions was quite different from that of conventiona… more
Date: April 1, 1999
Creator: Li, J.
Partner: UNT Libraries Government Documents Department
open access

Atom transfer and rearrangement reactions catalyzed by methyltrioxorhenium, MTO

Description: Methyltrioxorhenium (MTO) catalyzes the desulfurization of thiiranes by triphenylphosphine. Enormous enhancement in rate is observed when the catalyst is pretreated with hydrogen sulfide prior to the reaction. Using 2-mercaptomethylthiophenol as a ligand, the author synthesized several model complexes to study the mechanism of this reaction. With suitable model systems, they were able to show that the active catalyst is a Re(V) species. The reactions are highly stereospecific and very tolerant … more
Date: May 10, 1999
Creator: Jacob, J.
Partner: UNT Libraries Government Documents Department
open access

The Human Object: Explorations of the Figurative Toy

Description: This Problem in Lieu of Thesis documents the thought processes that led to the completion of a series of five interactive sculptures. Each piece incorporates a part of the human body taken from its normal context and placed into the context of children's playground equipment.
Date: December 1999
Creator: Blytas, Christina
Partner: UNT Libraries

Exploration of Sculpture

Description: The images that I sculpt deal with reflections of human traits. Wood lends itself to this endeavor, offering minimal resistance to manipulation. Keeping the origin and qualities of the material while manipulating it into another object is a statement within itself. Letting the wood do what it does naturally keeps the viewer in touch with the fact it is still just an object of nature. Wood does not make itself any less real because of the relationship of the sculpture to it as wood.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: December 1999
Creator: Coldewey, Charles
Partner: UNT Libraries
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