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United States Reports, Volume 509: Cases Adjudged in The Supreme Court at October Term, 1992
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between June 18 and October 1, 1993. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1305.
Date:
1997
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 510: Cases Adjudged in The Supreme Court at October Term, 1993
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between October 4, 1993 and March 21, 1994. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1323.
Date:
1997
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Reports, Volume 511: Cases Adjudged in The Supreme Court at October Term, 1993
Volume of the United States Reports containing the final decisions and opinions of the Supreme Court justices regarding cases between March 22 and June 7, 1994. Also includes notes regarding the members of the Supreme Court, orders, and other relevant materials. Index starts on page 1193.
Date:
1997
Creator:
United States. Supreme Court.
Object Type:
Book
System:
The UNT Digital Library
United States Statutes At Large, Volume 110, 1996
United States Statutes at Large include the text of various legislation passed by Congress such as private and public laws, concurrent resolutions, and Constitutional amendments as well as proclamations, changes to the structure of government departments, etc. Part One indexes start on page a1 after page 1198. Part Two indexes start on page a1 after page 1754. Part Three indexes start on page a1 after page 2870. Part Four indexes start on page a1 after page 3098. Part Five indexes start on page a1 after page 3846. Part Six indexes start on page a1 after page 4576.
Date:
1997
Creator:
United States. Congress.
Object Type:
Legislative Document
System:
The UNT Digital Library
[The University of North Texas Symphony Orchestra]
A newspaper clipping with a snippet on The University of North Texas' Symphony Orchestra and the Grand Chorus performing Beethoven's Ninth Symphony at the Concert Hall on campus.
Date:
[1997..]
Creator:
unknown
Object Type:
Clipping
System:
The UNT Digital Library
The unmoved center
Access:
Use of this item is restricted to the UNT Community
Recording of Randall Smith's The unmoved center. For electronics and pre-recorded sound. This piece constitutes an analogy that traces the path of its own construction. The title evokes this shapeless place where the possible seeks to materialize, and whose structure ultimately resides outside the limits of the individual. The focus is the interplay of forces presiding over the spiritual struggles that take place inside the body as it seeks its place between the manageable and the imaginable. It resides in a sphere of connected, discordant and harmonious sounds.
Date:
1997
Creator:
Smith, Randall, 1960-
Object Type:
Sound
System:
The UNT Digital Library
Unplugged
The artwork is in the shape of a plate and on it is depicted a masked man applying something to a large cactus like shape. The plate is rimmed in a textured blue. The light yellow background of the plate is covered with hieroglyphic type marks and symbols. The man's body is a heavily textured green color and his mask is orange.
Date:
1997
Creator:
Milnes, Robert
Object Type:
Physical Object
System:
The UNT Digital Library
Use of fusible beam plugs for accident mitigation at the LANSCE Complex
The LANSCE accelerator relies on a Radiation Security System to provide personnel protection from prompt beam-induced radiation. System faults inhibit beam generation in ion sources until areas are made safe by the automatic insertion of beam plugs (stoppers) for the affected area. Should system failures occur, final protection is provided by reliably-engineered, redundant fusible beam plugs which can intercept the beam at the accelerator injection energy of 750 keV. These plugs auto-insert on faults of the Radiation Security System, and remain in until the fault clears. They are normally protected by systems designed to shut off or intercept the full-power beam. In the event of failure of these systems, the beam incident on the stainless- steel surface of the plug will cause, the layer of steel to vaporize and open the beam-line to an atmospheric air passage that results in a portion of the accelerator losing vacuum. The low energy beam cannot propagate through air, thus ensuring personnel safety.
Date:
January 1, 1997
Creator:
Jones, K. W.; Boedeker, W. & Browman, A.
Object Type:
Article
System:
The UNT Digital Library
Use of high index substrates to enable dislocation filtering in large mismatch systems
We report results in three areas of research relevant to the fabrication of a wide range of optoelectronic devices: The development of a new x-ray diffraction technique that can be used to rapidly determine the optimal period of a strained layer superlattice to maximize the dislocation filtering; The optimal MBE growth parameters for the growth of CdTe on GaAs(211); The determination of the relative efficiency of dislocation filtering in the (211) and (100) orientations; and The surface quality of InSb grown by MOCVD on InSb substrates is affected by the misorientation of the substrate.
Date:
January 1, 1997
Creator:
Reno, J.L.; Biefeld, R.M.; Kurtz, S.R. & Baucom, K.C.
Object Type:
Report
System:
The UNT Digital Library
Use of indentation technique to measure elastic modulus of plasma-sprayed zirconia thermal barrier coating
Elastic modulus of an yttria partially stabilized zirconia (YSZ) thermal barrier coating (TBC) was evaluated with a Knoop indentation technique. The measured elastic modulus values for the coating ranged from 68.4 {+-} 22.6 GPa at an indentation load of 50 g to 35.7 {+-} 9.8 at an indentation load of 300 g. At higher loads, the elastic modulus values did not change significantly. This steady-state value of 35.7 GPa for ZrO{sub 2} TBC agreed well with literature values obtained by the Hertzian indentation method. Furthermore, the measured elastic modulus for the TBC is lower than that reported for bulk ZrO{sub 2} ({approx} 190 GPa). This difference is believed to be due to the presence of a significant amount of porosity and microcracks in the TBCs. Hardness was also measured.
Date:
January 1, 1997
Creator:
Singh, J.P.; Sutaria, M. & Ferber, M.
Object Type:
Report
System:
The UNT Digital Library
Use of injection wells for refinery waste disposal. Quarterly report, October 1, 1996--December 31, 1996
The Ground Water Protection Council has had initial discussions with the American Petroleum Institute staff and several major oil companies concerning a project that would address several technical and regulatory issues related to the use of injection wells at refineries. As currently regulated by the United States Environmental Protection Agency (USEPA), injection wells used for refinery related disposal are typically classified as either Class I hazardous or non- hazardous, depending on RCRA classification. The expense of acquiring an operating permit for these types of wells is very high and they have substantially more operational expenses than a typical Class II injection well. What is perplexing, based on general observation, is that some Class II injection wells are being permitted and allowed to dispose of waste having similar characteristics as some of those used by the refineries but classified as hazardous. Class II injection wells are authorized statutorily because the injectate is associated with fluids originating from the production of hydrocarbons. From our conversations with several state oil and gas regulatory agencies and representatives of the refinery industry, it appears that the use of Class II wells at refineries has been rejected because they are not seen as being directly associated …
Date:
January 1, 1997
Creator:
Paque, M.
Object Type:
Report
System:
The UNT Digital Library
The use of microdosimetric techniques in radiation protection measurements
A major objective of radiation protection is to determine the dose equivalent for routine radiation protection applications. As microdosimetry has developed over approximately three decades, its most important application has been in measuring radiation quality, especially in radiation fields of unknown or inadequately known energy spectra. In these radiation fields, determination of dose equivalent is not straightforward; however, the use of microdosimetric principles and techniques could solve this problem. In this paper, the authors discuss the measurement of lineal energy, a microscopic analog to linear energy transfer, and demonstrate the development and implementation of the variance-covariance method, a novel method in experimental microdosimetry. This method permits the determination of dose mean lineal energy, an essential parameter of radiation quality, in a radiation field of unknown spectrum, time-varying dose rate, and high dose rate. Real-time monitoring of changes in radiation quality can also be achieved by using microdosimetric techniques.
Date:
January 1, 1997
Creator:
Chen, J.; Hsu, H.H.; Casson, W.H. & Vasilik, D.G.
Object Type:
Article
System:
The UNT Digital Library
The Use of Oxygen Gradients as a Texturing Mechanism During Isothermal Melt Processing of Bi-2212 Superconductors
Isothermal melt processing has been used to produce high critical currents (I{sub c}`s) and current densities (J{sub c}`s) in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y} round wires and flat tapes. I{sub c}`s and J{sub c}`s of 225 A and 80 kA/cm{sup 2} have been obtained in short length, monocore wires. However, voids and other macroscopic defects have limited performance over longer lengths. Isothermally melt processed tapes have yielded I{sub c} and J{sub c} values up to 341 A and 245 kA/cm{sup 2}, although performance over longer lengths is somewhat reduced. A test coil made from 0.5 m of tape yielded, I{sub c} and J{sub c} values of 208 A and 153 kA/cm{sup 2}, respectively.
Date:
January 1, 1997
Creator:
Holesinger, T. G.; Hults, W. L.; Smith, J. L.; Dai, Weiming & Marken, K. R.
Object Type:
Article
System:
The UNT Digital Library
Use of sonication for in-well softening of semivolatile organic compounds. 1997 annual progress report
'This project investigates the in-situ degradation of semivolatile organic compounds (SVOCs) and volatile organic compounds (VOCs) using in-well sonication, in-well vapor stripping, and bioremediation. Pretreating groundwaters with sonication techniques in-situ would form VOCs that can be effectively removed by in-well vapor stripping and bioremediation. The mechanistic studies focus on the coupling of megasonics and ultrasonics to soften (i.e., partially degrade) the SVOCs; oxidative reaction mechanism studies; surface corrosion studies (on the reactor walls/well); enhancement due to addition of oxidants, quantification of the hydroxyl radical formation; identification/quantification of degradation products; volatility/degradability of the treated waters; development of a computer simulation model to describe combined in-well sonication/in-well vapor stripping/bioremediation; systems analysis/economic analysis; large laboratory-scale experiment verification; and field demonstration of the integrated technology. Benefits of this approach include: (1) Remediation is performed in-situ; (2) The treatment systems complement each other; their combination can drastically reduce or remove SVOCs and VOCs; (3) Ability to convert hard-to-degrade organics into more volatile organic compounds; (4) Ability to remove residual VOCs and softened SVOCs through the combined action of in-well vapor stripping and biodegradation; (5) Does not require handling or disposing of water at the ground surface; and (6) Cost-effective and improved efficiency, resulting in shortened …
Date:
January 1997
Creator:
Peters, R. W.; Manning, J.; Hoffman, M. R. & Gorelick, S.
Object Type:
Report
System:
The UNT Digital Library
Use of the HPI Model 2080 pulsed neutron detector at the LANSCE complex - vulnerabilities and counting statistics
The BPI Model 2080 Pulsed Neutron Detector has been used for over seven years as an area radiation monitor and dose limiter at the LANSCE accelerator complex. Operating experience and changing environments over this time have revealed several vulnerabilities (susceptibility to electrical noise, paralysis in high dose rate fields, etc.). Identified vulnerabilities have been connected; these modifications include component replacement and circuit design changes. The data and experiments leading to these modifications will be presented and discussed. Calibration of the instrument is performed in mixed static gamma and neutron source fields. The statistical characteristics of the Geiger-Muller tubes coupled with significantly different sensitivity to gamma and neutron doses require that careful attention be paid to acceptable fluctuations in dose rate over time during calibration. The performance of the instrument has been modeled using simple Poisson statistics and the operating characteristics of the Geiger-Muller tubes. The results are in excellent agreement with measurements. The analysis and comparison with experimental data will be presented.
Date:
January 1, 1997
Creator:
Jones, K. W. & Browman, A.
Object Type:
Article
System:
The UNT Digital Library
User guide to power management for PCs and monitors
Power management of personal computers (PCs) and monitors has the potential to save significant amounts of electricity as well as deliver other economic and environmental benefits. The Environmental Protection Agency`s ENERGY STAR{reg_sign} program has transformed the PC market so that equipment capable of power management is now widely available. However, previous studies have found that many Energy Star compliant computer systems are not accomplishing energy savings. The principal reasons for this are systems not being enabled for power management or a circumstance that prevents power management from operating. This guide is intended to provide information to computer support workers to increase the portion of systems that successfully power manage. The guide introduces power management concepts and the variety of benefits that power management can bring. It then explains how the parts of a computer system work together to enter and leave power management states. Several common computer system types are addressed, as well as the complications that networks bring to power management. Detailed instructions for checking and configuring several system types are provided, along with trouble shooting advice. The guide concludes with a discussion of how to purchase Energy Star compliant systems and future directions for power management of PCs …
Date:
January 1997
Creator:
Nordman, B.; Piette, M. A.; Kinney, K. & Webber, C.
Object Type:
Report
System:
The UNT Digital Library
Using trees to remediate groundwaters contaminated with chlorinated hydrocarbons. 1997 annual progress report
'Metabolism of Chlorinated Hydrocarbons Laboratory and field tests with poplar in tissue culture, bioreactors, and field sites have shown that, unlike bacteria, these plants are able to carry out complete degradation of fully chlorinated alkanes and alkenes to carbon dioxide and chloride. Carbon dioxide was produced as a product of the degradation of trichloroethylene (TCE), carbon tetrachloride (CT), and perchloroethylene (PCE) when axenic tissue cultures of poplar cells were exposed to radiolabelled compounds. The apparent degradation of PCE and CT, fully chlorinated hydrocarbons, in these aerobic plants is remarkable when contrasted to the lack of comparable aerobic degradation by bacteria. Oxidized metabolites, such as trichloroethanol, and di- and trichloroacetic acid, were detected in cell cultures exposed to TCE, suggesting the involvement of cytochrome P450s or other monooxygenase activities. Mass balance experiments with small poplar plants in laboratory reactors showed that significant TCE and CT was volatilized from the leaves, while a similar fraction of radiolabeled carbon from these chlorinated solvents was retained in the plant tissue.'
Date:
January 1, 1997
Creator:
Gordon, M. P.; Newman, L. A. & Strand, S. E.
Object Type:
Report
System:
The UNT Digital Library
Vacancy related defects in La{sub 0.5}Sr{sub 0.5}CoO{sub 3-{delta}} thin films
Laser ablated La{sub 0.5}Sr{sub 0.5}CoO{sub 3-{delta}} thin films have been studied by Doppler-broadening-detected positron annihilation using a variable-energy positron beam. The oxygen partial pressure during cooling from the growth temperature was altered through the range 760 torr to 10{sup -5} torr to change the oxygen non-stoichiometry of the films. The measured Doppler broadened lineshape parameter S was found to increase with increasing oxygen nonstoichiometry. For films cooled with an oxygen partial pressure of {le} 10{sup -4} Torr positron trapping to monovacancy type defects is inferred. For the film cooled in 10{sup -5} torr oxygen the magnitude of the increase in S, with respect to that measured from the film cooled in 760 Torr oxygen, showed positron trapping to vacancy cluster defects was occurring.
Date:
1997
Creator:
Keeble, D. J.; Krishnan, A. & Nielsen, B.
Object Type:
Article
System:
The UNT Digital Library
La vague
Access:
Use of this item is restricted to the UNT Community
Recording of Etienne Saur's La vague. This work was created for a choral dance created as part of "la Fête dans la ville" and in collaboration with the dance class of the CNR of Amiens. This composition used the movement notation system called kinetography invented by Rudolph Laban.
Date:
1997
Creator:
Saur, Etienne
Object Type:
Sound
System:
The UNT Digital Library
Variasjonar over ei stille (silence et version)
Access:
Use of this item is restricted to the UNT Community
Recording of Risto Holopainen's Variasjonar over ei stille (silence et version). Variasjonar over ei stille (Silence and Variations) is based upon two poems by the composer. Although originally written in Swedish, here they appear translated by Elin Lotsberg into her own West-Norwegian dialect. Her readings of the poems, with widely differing characters, provides the sonic and structural material for the entire composition. Several phrases were transcribed and then resynthesized in a "blown-up" manner. The overall time proportions in the piece also relates to the proportions of speech and silence between the stanzas in a particular reading. The material was recorded at the Norwegian State Academy of Music in 1996, and the work was realized at NoTAM (Norwegian network for Technology, Acoustics and Music) in October 1997.
Date:
1997
Creator:
Holopainen, Risto
Object Type:
Sound
System:
The UNT Digital Library
Vectorial electron transfer in spatially ordered arrays. Progress report, August 1994--January 1997
With DOE support from August 1994 to August 1997, this project sought to identify methods for controlled placement of light absorbers, relays, and multielectron catalysts at defined sites from a fixed semiconductor or metal surface and, thus, to develop methods for preparing chemically modified photoactive surfaces as artificial photosynthetic units. These designed materials have been evaluated as efficient light collection devices and as substrates for defining the key features that govern the efficiency of long distance electron transfer and energy migration. The authors have synthesized several different families of integrated chemical systems as soluble arrays, as solid thin films, and as adsorbates on solid electrodes, seeking to establish how spatial definition deriving from covalent attachment to a helical polymer backbone, from self assembly of functionalized tethers on gold or metal oxide surfaces, and from rigid or layered block polymers can lead to controlled electron and energy transfer. The authors have also conducted physical characterization of semiconductor-containing composites active in controlled interfacial electron transfer, with charge transport in these materials having been evaluated by photophysical and electrochemical methods.
Date:
January 1, 1997
Creator:
Fox, M. A.
Object Type:
Report
System:
The UNT Digital Library
Velocity and Concentration Studies of Flowing Suspensions by Nuclear Magnetic Resonance Imaging
Nuclear magnetic resonance imaging (NMRI) techniques were developed to study concentrated suspension flows. Some of the proposed tasks were completed and others partly completed before the funding was terminated. The tasks completed were (1) materials selection for imaging of both particle and fluid components, (2) pipe flow measurements, and (3) flows in complex geometries. The task tackled with good progress is to develop rapid imaging techniques by analog compensation of eddy currents generated by the gradient pulses and real-time image reconstruction from the rapidly obtained data. The most suitable combination of materials arrived at is pharmaceutical beads in silicon oil. Their relaxation times T, are sufficiently different to permit imaging the two components separately. The pipe flow experiment used 3 mm, neutrally buoyant, plastic particles, up to 40% by volume, in 80-90W transmission oil flowing in a 5 cm diameter pipe. A series of distances ranging from 60 cm to 6 m downstream from a commercial mixer was studied. The flow is fully developed at 6 m and the velocity and concentration profiles agree with the earlier lower resolution experiments. The eddy current compensation scheme works well for two channels and is being extended to eight channels including the uniform …
Date:
January 1, 1997
Creator:
Fukushima, E.
Object Type:
Report
System:
The UNT Digital Library
Vent du Sud
Access:
Use of this item is restricted to the UNT Community
Recording of Nicolas Vérin's Vent du Sud.
Date:
1997
Creator:
Vérin, Nicolas
Object Type:
Sound
System:
The UNT Digital Library
Vertical transport and sources in flux models
Vertical transport in flux models in examined and shown to reproduce expected limits for densities and fluxes. Disparities with catalog distributions are derived and inverted to find the sources required to rectify them.
Date:
January 1, 1997
Creator:
Canavan, G. H.
Object Type:
Report
System:
The UNT Digital Library