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Absorption
Access:
Use of this item is restricted to the UNT Community
Recording of Jongwoo Yim's Absorption. This work includes instrumental sounds as well as electronic sounds (both from tape and live electronics). The clarinet line is a spotlight and eventually gets pulled into the harmonies of the other parts.
Date:
1997/1998
Creator:
Yim, Jongwoo
Object Type:
Sound
System:
The UNT Digital Library
Accelerator driven assembly
This report addresses a Los Alamos National Laboratory (LANL) proposal to build a pulsed neutron source for simulating nuclear-weapons effects. A point design for the pulsed neutron facility was initiated early in FY94 after hosting a Defense Nuclear Agency (DNA) panel review and after subsequently visiting several potential clients and users. The technical and facility designs contained herein fulfill the Statement of Work (SOW) agreed upon by LANL and DNA. However, our point designs and parametric studies identify a unique, cost-effective, above-ground capability for neutron nuclear-weapons-effects studies at threat levels. This capability builds on existing capital installations and infrastructure at LANL. We believe that it is appropriate for us, together with the DNA, to return to the user community and ask for their comments and critiques. We also realize that the requirements of last year have changed significantly. Therefore, the present report is a `working document` that may be revised where feasible as we learn more about the most recent Department of Defense (DoD) and Department of Energy (DOE) needs.
Date:
January 1997
Creator:
Balderas, J.; Cappiello, M.; Cummings, C. E. & Davidson, R.
Object Type:
Report
System:
The UNT Digital Library
Acid-base behavior in hydrothermal processing of wastes. 1997 annual progress report
'A major obstacle to the development of hydrothermal technology for treating DOE wastes has been a lack of scientific knowledge of solution chemistry, thermodynamics and transport phenomena. The progress over the last year is highlighted in the following four abstracts from manuscripts which have been submitted to journals. The authors also have made considerable progress on a spectroscopic study of the acid-base equilibria of Cr(VI). They have utilized novel spectroscopic indicators to study acid-base equilibria up to 380 C. Until now, very few systems have been studied at such high temperatures, although this information is vital for hydrothermal processing of wastes. The pH values of aqueous solutions of boric acid and KOH were measured with the optical indicator 2-naphthol at temperatures from 300 to 380 C. The equilibrium constant Kb-l for the reaction B(OH)3 + OH{sup -} = B(OH){sup -4} was determined from the pH measurements and correlated with a modified Born model. The titration curve for the addition of HCl to sodium borate exhibits strong acid-strong base behavior even at 350 C and 24.1 MPa. At these conditions, aqueous solutions of sodium borate buffer the pH at 9.6 t 0.25. submitted to Ind. Eng. Chem. Res. Acetic Acid and …
Date:
January 1, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Acoustic Emission Monitoring of a Wind Turbine Blade During a Fatigue Test
A fatigue test of a wind turbine blade was conducted at the National Renewable Energy Laboratory in the fall of 1994. Acoustic emission monitoring of the test was performed, starting with the second loading level. The acoustic emission data indicated that this load exceeded the strength of the blade. From the first cycle at the new load, an oil can type of deformation occurred in two areas of the upper skin of the blade. One of these was near the blade root and the other was about the middle of the tested portion of the blade. The emission monitoring indicated that no damage was taking place in the area near the root, but in the deforming area near the middle of the blade, damage occurred from the first cycles at the higher load. The test was stopped after approximately one day and the blade was declared destroyed, although no gross damage had occurred. Several weeks later the test was resumed, to be continued until gross damage occurred. The upper skin tore approximately one half hour after the cycling was restarted.
Date:
January 1, 1997
Creator:
Beattie, A. G.
Object Type:
Article
System:
The UNT Digital Library
Acoustic probe for solid-gas-liquid suspensions. 1997 annual progress report
'Acoustic probes have shown promise to be quite effective in determining the solid content in solid-liquid suspensions. However, the presence of small amounts of gas in the waste slurries stored in tanks across the DOE complex prevents straightforward application for characterization of these slurries. The proposed research will develop an acoustic probe for monitoring particle size and volume fraction in slurries in the absence and the presence of gas bubbles. Theoretical Analysis Accomplished: Attenuation of sound waves depends on the size distribution of the solids and the volume fraction of solids. These can in principle be calculated from attenuation measured over a range of frequencies. However, small amounts of bubbles distort the measured attenuation. A typical result from theoretical analysis for the attenuation of solid- gas-liquid systems is given in Figure 1. The total attenuation of a sound wave v(o) equals the sum of contributions by a large number of ''bins'' of particle sizes. This notion yields the following equation for the (hitherto) unknown number density of solid particles as a function of particle radius N(a): j k(o,a)N(a)da = v(o), where the kernel k(o,a) is obtained from analysis. If N(a) is given, the above equation is used to calculate the …
Date:
January 1, 1997
Creator:
Tavlarides, L. L. & Sangani, A. S.
Object Type:
Report
System:
The UNT Digital Library
Adsorption/membrane filtration as a contaminant concentration and separation process for mixed wastes and tank wastes. Progress report, 1996--1997
'The goal of this research is the development of a treatment system for the separation of contaminants in low-organic Hanford tank wastes into sub-groups that can subsequently be processed and appropriately disposed of. Since many of the contaminants of concern are associated with solids, initial experimental work has focused on characterizing the particulate matter in Hanford waste and understanding the filterability of this waste through membranes. Removal of some of the soluble contaminants by adsorption has been studied as well. The experimental work conducted to date can be divided into four categories: speciation calculations; solid/aqueous phase partitioning; membrane filtration experiments; and sorption experiments. The work was conducted using two simulated Hanford wastes (SHWs), one that contained strong complexing agents (citrate and EDTA) and one that did not.'
Date:
January 1, 1997
Creator:
Benjamin, M.M.
Object Type:
Report
System:
The UNT Digital Library
The ADVANCE project: Formal evaluation of the targeted deployment. Volume 1
The Advanced Driver and Vehicle Advisory Navigation ConcEpt (ADVANCE) was an invehicle advanced traveler information system (ATIS) that operated in the northwest suburbs of Chicago, Illinois. It was designed to provide origin-destination shortest-time route guidance to a vehicle based on (a) an on-board static (fixed) data base of average network link travel times by time of day, combined as available and appropriate with (b) dynamic (real-time) information on traffic conditions provided by radio frequency (RF) communications to and from a traffic information center (TIC). Originally conceived in 1990 as a major project that would have installed 3,000 to 5,000 route guidance units in privately owned vehicles throughout the test area, ADVANCE was restructured in 1995 as a {open_quotes}targeted deployment,{close_quotes} in which approximately 80 vehicles were to be equipped with the guidance units - Mobile Navigation Assistants (MNAs) - to be in full communication with the TIC while driving the ADVANCE test area road system. Volume one consists of the evaluation managers overview report, and several appendices containing test results.
Date:
January 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The ADVANCE project: Formal evaluation of the targeted deployment. Volume 2
The ADVANCE familiar driver test provided a small sample of drivers familiar with their local road network and patterns of recurring congestion with an opportunity to drive a vehicle equipped with the ADVANCE dynamic route guidance system for a period of two weeks of normal use. On the basis of this test experience, drivers were asked to evaluate the ADVANCE system and to assess the value of features for future in-vehicle route guidance systems. This test involved 80 volunteer households living in the ADVANCE test area in northwest suburban Chicago; 110 drivers from these households used the ADVANCE vehicle and responded to both baseline (pre-test) and post-test surveys. Thirty two of these drivers participated in focus groups. Drivers also maintained written logs describing their rerouting experiences with the ADVANCE system.
Date:
January 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The ADVANCE project: Formal evaluation of the targeted deployment. Volume 3
ADVANCE [Advanced Driver and Vehicle Advisory Navigation ConcEpt] was a public/private partnership conceived and developed by four founding parties. The founding parties include the Federal Highway Administration (FHWA), the Illinois Department of Transportation (IDOT), the University of Illinois at Chicago and Northwestern University operating together under the auspices of the Illinois Universities Transportation Research Consortium (IUTRC), and Motorola, Inc. The major responsibilities of each party are fully described in the Project agreement. Subsequently, these four were joined on the Steering Committee by the American Automobile Association (AAA). This unique blending of public sector, private sector and university interests, augmented by more than two dozen other private sector participants, provided a strong set of resources for ADVANCE. The ADVANCE test area covered over 300 square miles including portions of the City of Chicago and 40 northwest suburban communities. The Project encompasses the high growth areas adjacent to O`Hare International Airport, the Schaumbura/Hoffman Estates office and retail complexes, and the Lake-Cook Road development corridor. It also includes major sports and entertainment complexes such as the Arlington International Racecourse and the Rosemont Horizon. The population in the area is more than 750,000. This volume provides a summary of the insights and achievements made …
Date:
January 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced byproduct recovery: Direct catalytic reduction of sulfur dioxide to elemental sulfur. Fourth quarterly technical progress report
The team of Arthur D. Little, Tufts University and Engelhard Corporation are conducting Phase 1 of a four and a half year, two-phase effort to develop and scale-up an advanced byproduct recovery technology that is a direct, single-stage, catalytic process for converting sulfur dioxide to elemental sulfur. This catalytic process reduces SO{sub 2} over a fluorite-type oxide (such as ceria and zirconia). The catalytic activity can be significantly promoted by active transition metals, such as copper. More than 95% elemental sulfur yield, corresponding to almost complete sulfur dioxide conversion, was obtained over a Cu-Ce-O oxide catalyst as part of an on-going DOE-sponsored, University Coal Research Program. This type of mixed metal oxide catalyst has stable activity, high selectivity for sulfur production, and is resistant to water and carbon dioxide poisoning. Tests with CO and CH{sub 4} reducing gases indicate that the catalyst has the potential for flexibility with regard to the composition of the reducing gas, making it attractive for utility use. The performance of the catalyst is consistently good over a range of SO{sub 2} inlet concentration (0.1 to 10%) indicating its flexibility in treating SO{sub 2} tail gases as well as high concentration streams.
Date:
January 1, 1997
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced photoinjector laser and microwave technologies. Final report
An overview of the design parameters of the compact, high gradient, high luminosity X-band (8.568 GHz) photoinjector facility currently being developed as a collaborative effort between LLNL and UC Davis, is followed by a more detailed description of each of its major subsystems : X-band rf gun, GHz repetition rate synchronously modelocked AlGaAs quantum well laser oscillator, and 8-pass Ti: Al{sub 2}O{sub 3} chirped pulse laser amplifier. The photoinjector uses a high quantum efficiency ({approx}5%) Cs{sub 2}Te photocathode, and will be capable of producing high charge (> 1 nC), relativistic (5 MeV), ultrashort (< 1 ps) electron bunches at 2.142 GHz repetition rate in burst mode (100 photoelectron bunches). Design studies indicate that a normalized rms transverse emittance {epsilon}{sub n} = 0.75 {pi} mm-mrad is possible at 0.1 nC charge, while 2.5 {pi} mm-mrad can be obtained at 1 nC. A complete status report of our progress in the development and implementation of the design discussed herein is then given, together with initial experimental data concerning the performance of the 15 MW SLAC X-band klystron amplifier. Finally, the phase noise and jitter characteristics of the laser and rf systems of the high gradient X-band photoinjector have been measured experimentally. In …
Date:
January 1, 1997
Creator:
Hartemann, F. V.; Luhmann, N. C. Jr. & Talley, W. K.
Object Type:
Report
System:
The UNT Digital Library
Advanced Quadrupole Ion Trap Instrumentation for Low Level Vehicle Emissions Measurements
Quadrupole ion trap mass spectrometry has been evaluated for its potential use in vehicle emissions measurements in vehicle test facilities as an analyzer for the top 15 compounds contributing to smog generation. A variety of ionization methods were explored including ion trap in situ chemical ionization, atmospheric sampling glow discharge ionization, and nitric oxide chemical ionization in a glow discharge ionization source coupled with anion trap mass spectrometer. Emphasis was placed on the determination of hydrocarbons and oxygenated hydrocarbons at parts per million to parts per billion levels. Ion trap in situ water chemical ionization and atmospheric sampling glow discharge ionization were both shown to be amendable to the analysis of arenes, alcohols, aldehydes and, to some degree, alkenes. Atmospheric sampling glow discharge also generated molecular ions of methy-t-butyl ether (MTBE). Neither of these ionization methods, however, were found to generate diagnostic ions for the alkanes. Nitric oxide chemical ionization, on the other hand, was found to yield diagnostic ions for alkanes, alkenes, arenes, alcohols, aldehydes, and MTBE. The ability to measure a variety of hydrocarbons present at roughly 15 parts per billion at measurement rates of 3 Hz was demonstrated. All of the ions with potential to serve as …
Date:
January 1, 1997
Creator:
McLuckey, S.A.
Object Type:
Report
System:
The UNT Digital Library
Advancing the Technology Base for High Temperature Hydrogen Membranes
High purity hydrogen is a critical component for at least two major industrial processes: 1) the refining of conventional steels and raw pig iron into low carbon steels and high purity iron used for high performance magnets in motors, generators, alternators, transformers, and etc.; and 2) refining metallurgical grade silicon to the high- purity, polycrystalline silicon used in fabricating single crystal silicon wafers for semiconductor manufacturing. In the process of producing low carbon iron products, CO and CO2 impurities prevent efficient removal of the carbon already in the raw iron. In the refining of metallurgical grade silicon, the presence of any impurity above the part-per- million level prevents the ultimate fabrication of the large scale single crystals that are essential to the semiconductor device. In a lesser magnitude role, high quality hydrogen is used in a variety of other processes, including specialty metals refining (e.g., iridium, osmium, palladium, platinum, and ruthenium) and R{ampersand}D in areas such as organic synthesis and development of certain types of fuel cells. In all of these applications, a high-temperature hydrogen membrane can provide a method for achieving a very high purity level of hydrogen in a manner that is more economical and/or more rugged than …
Date:
1997
Creator:
Dye, Robert C. & Moss, Thomas S.
Object Type:
Article
System:
The UNT Digital Library
[Advertisement: Turtle Creek Chorale]
An advertisement of the Turtle Creek Chorale concert album, "Reflections: Songs Without Words."
Date:
1997
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Advertisement: Twisted Turtle Tinsel]
An advertisement of the Turtle Creek Chorale concert album. The advert includes green text and images of turtles.
Date:
1997
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
The Aerie, Yearbook of the University of North Texas, 1997
Yearbook for University of North Texas in Denton, Texas includes photos of and information about the school, student body, professors, and organizations.
Date:
1997
Creator:
University of North Texas
Object Type:
Yearbook
System:
The Portal to Texas History
[Aesthetic Development]
A research team from the Calouste Gulbenkian Foundation is visiting the School of Visual Arts to observe a teacher training institute from June 16th - 27th. The Gulbenkian Foundation, located in Lisbon, Portugal is sending the group to study an approach to art teaching known as discipline-based art education. A list of names of the individuals part of the research team are mentioned in the document.
Date:
[1997..]
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Affirmation
Access:
Use of this item is restricted to the UNT Community
Recording of Anna Elizabeth Hinkle Turner's Affirmation. This work uses pre-recorded sounds and electroacoustic technique to find new sound possibilities. The composer's utilized; ProTools, SoundEdit 16, StudioVision Pro and SoundHack for the generation and mixing of all sound files.
Date:
1997
Creator:
Hinkle-Turner, Elizabeth
Object Type:
Sound
System:
The UNT Digital Library
Affirmation News, Volume 6, Number 1, January 1997
Newsletter of the Dallas chapter of the United Methodists for Lesbian, Gay, and Bisexual Concerns discussing the group's activities and other news, events, and information of interest to members.
Date:
January 1997
Creator:
United Methodists for Lesbian, Gay, and Bisexual Concerns
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
African Violet
Access:
Use of this item is restricted to the UNT Community
Recording of Jo Thomas' African Violet. For electronics and pre-recorded audio.
Date:
1997
Creator:
Thomas, Jo, 1972-
Object Type:
Sound
System:
The UNT Digital Library
The Age, Volume [18], Number 1, January 1997
Monthly publication containing information related to Chambers County, Texas, including current events of the Chambers County Historical Commission, the Wallisville Heritage Park, and the Chambers County historical and genealogical societies; reprinted newspaper articles about county events and citizens; and historical news and records.
Date:
January 1997
Creator:
Wallisville Heritage Park (Organization)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Agnaby
Access:
Use of this item is restricted to the UNT Community
Recording of Francesco Giomi's Agnaby. Realized at the Sheffield University Sound Studio (UK). Agnaby is an electroacoustic drama freely inspired by the novel "L'Etranger" by Albert Camus. It is also an attempt to get in touch, from a musical point of view, with Arab culture and language. The material is derived from a) environmental sounds of the Arab urban life and culture; b) fragments from Arab traditional music and texts; c) excerpts from the French text of the book read by Daniel Arfib. The objects, having pre-existing functions and carrying intrinsic associations and meanings, have been processed with different algorithms in order to create different degrees of transformation and recognizability. The formal structure of the piece is divided into two parts; the first follows the idea of a story taking place in an open and free space, with its noises and its sonic life; the second moves along the idea of a close and narrow environment, the courthouse of the novel, with its people, its atmospheres and its more introverted and predestined character. Agnaby was realized during a period of composer residence at the Department of Music of the University of Sheffield and it was premiered in Cagliari during the …
Date:
1997
Creator:
Giomi, Francesco, 1963-
Object Type:
Sound
System:
The UNT Digital Library
AGS experiments - 1994, 1995, 1996
This report contains the following information on the Brookhaven AGS Accelerator complex: FY 1996 AGS schedule as run; FY 1997 AGS schedule (working copy); AGS beams 1997; AGS experimental area FY 1994 physics program; AGS experimental area FY 1995 physics program; AGS experimental area FY 1996 physics program; AGS experimental area FY 1997 physics program (in progress); a listing of experiments by number; two-phage summaries of each experiment begin here, also ordered by number; listing of publications of AGS experiments begins here; and listing of AGS experimenters begins here.
Date:
January 1, 1997
Creator:
Depken, J. C.
Object Type:
Report
System:
The UNT Digital Library
Air
Access:
Use of this item is restricted to the UNT Community
Recording of Zlatko Tanodi's Air. This piece was composed for bass clarinet and tape in 1997, and was first performed at the Music Biennale Zagreb festival in 1997 (the soloist for that performance was Ratko Vojtek). The composer's inspiration was the polysemy of the word air (air, atmosphere, area, aria, song with accompaniment). The motto of the whole work is a paraphrase of the concept of “air you were, air you are, and into air you shall return;” sound is treated as a special physical condition of the air needed for acoustic perception, as well as for starting of the resonance of the bass clarinet’s body. While a naked instrument looks for its own expression, offering building material heartlessly exploited by sampling machines, a cause-effect of man and machine appears: it is not possible to distinguish who is who. The acoustic instrument would like to sound like an electronic one, and electronic instruments more faithfully imitate acoustic ones. However, at the end, all these are just vibrations in the air, all is but air. Other association lines are also possible (e.g. building, history, money ways, etc.). This composition has four movements: RespIRAtion, PrepARatIon, Aria and Gone with the Wind. The …
Date:
1997
Creator:
Tanodi, Zlatko, 1953-
Object Type:
Sound
System:
The UNT Digital Library