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Office of Scientific & Technical Information Technical Reports
14,335
Texas State Publications
447
Texas Attorney General Opinions
207
USGS Topographic Map Collection
191
Texas Register
103
Technical Report Archive and Image Library
61
Office of Technology Assessment
48
Congressional Research Service Reports
40
Federal Communications Commission Record
26
Government Comics
13
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7.5 Minute Series (Topographic)
124
Texas Register
103
30 x 60 Minute Series (Topographic)
50
Texas Parks & Wildlife News
50
Texas Motor Vehicle Traffic Accident Summaries
42
Argonne National Laboratory Reports
35
FCC Record
26
Texas Preventable Disease News
26
Data Summary of Municipal Solid Waste Management Alternatives
23
Fiscal Year 1992
19
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15,490 Matching Results
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A design of experiment study of plasma sprayed alumina-titania coatings
An experimental study of the plasma spraying of alumina-titania powder is presented in this paper. This powder system is being used to fabricate heater tubes that emulate nuclear fuel tubes for use in thermal-hydraulic testing. Coating experiments were conducted using a Taguchi fractional-factorial design parametric study. Operating parameters were varied around the typical spray parameters in a systematic design of experiments in order to display the range of plasma processing conditions and their effect on the resultant coating. The coatings were characterized by hardness and electrical tests, image analysis, and optical metallography. Coating qualities are discussed with respect to dielectric strength, hardness, porosity, surface roughness, deposition efficiency, and microstructure. The attributes of the coatings are correlated with the changes in operating parameters.
Date:
January 1, 1992
Creator:
Steeper, T. J. (Du Pont de Nemours (E.I.) and Co., Aiken, SC (United States). Savannah River Lab.); Varacalle, D. J. Jr.; Wilson, G. C. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Riggs, W. L. II (Tubal Cain Co., Loveland, OH (United States)); Rotolico, A. J. & Nerz, J. E. (Metco/Perkin-Elmer, Westbury, NY (United States))
Object Type:
Article
System:
The UNT Digital Library
Least cost planning from a customer's perspective
In this paper, I offer some thoughts about least cost planning, not from the perspective of the regulator or utility, but from the perspective of a residential customer. The problem that I address is, as a homeowner in northern Virginia, I am about to make a long term fuel choice for my household, where the options include, natural gas, electricity and fuel oil. An additional choice is the energy efficiency capital investment in my home that could decrease my monthly fuel costs. My decision process, hopefully as a rational consumer, offers implications about the efficiency of various services provided by all three fuel suppliers, including the local natural gas distribution companies (LDC).
Date:
March 2, 1992
Creator:
Sutherland, R.J.
Object Type:
Article
System:
The UNT Digital Library
Hot gas desulfurization with oxides of zinc, iron, and vanadium
The objective of this study is to develop an improved sorbent which can reduce H{sub 2}S levels up to 1 ppmv or less, which can stabilize zinc, and produce economically recoverable amounts of elemental sulfur during regeneration. For this purpose, the desulfurization performance of sorbents prepared by the addition of various amounts of V{sub 2}O{sub 5} to the zinc ferrite sorbent is investigated.
Date:
January 1, 1992
Creator:
Akyurtlu, J.F. & Akyurtlu, A.
Object Type:
Article
System:
The UNT Digital Library
Lattice gaugefixing and other optics in lattice gauge theory
We present results from four projects. In the first, quark and gluon propagators and effective masses and {Delta}I = 1/2 Rule operator matching coefficients are computed numerically in gaugefixed lattice QCD. In the second, the same quantities are evaluated analytically in the strong coupling, N {yields} {infinity} limit. In the third project, the Schwinger model is studied in covariant gauges, where we show that the effective electron mass varies with the gauge parameter and that longitudinal gaugefixing ambiguities affect operator product expansion coefficients (analogous to {Delta}I = 1/2 Rule matching coefficients) determined by matching gauge variant matrix elements. However, we find that matching coefficients even if shifted by the unphysical modes are {xi} invariant. In the fourth project, we show that the strong coupling parallelogram lattice Schwinger model as a different thermodynamic limit than the weak coupling continuum limit. As a function of lattice skewness angle these models span the {Delta} = {minus}1 critical line of 6-vertex models which, in turn, have been identified as c = 1 conformal field theories.
Date:
June 1, 1992
Creator:
Yee, Ken.
Object Type:
Report
System:
The UNT Digital Library
Precision measurement of the direct CP violation parameter. var epsilon. prime /. var epsilon. via the four K yields 2. pi. decay modes and a high sensitivity search for CP violating rare K sub L decays, Task J
This report discusses the progress on the measurement of the direct CP violation parameter {var epsilon}{prime}/{var epsilon} and the rare KL decay. The progress has been as follows: (A) results from the complete E731 data set which was collected in the 1987/88 fixed target run; preparations for and the taking of the data for (B) E773 (CPT symmetry test) and (C) E799 (rare decay study); and finally (D) R D for a new detector to further study {var epsilon}{prime}/{var epsilon} and rate decays.
Date:
April 1, 1992
Creator:
Wah, Yau W.
Object Type:
Report
System:
The UNT Digital Library
Comparative mutagenesis of human cells in vivo and in vitro
This report discusses measuring methods of point mutations; high density cell cultures for low dose studies; measurement and sequence determination of mutations in DNA; the mutational spectra of styrene oxide and ethlyene oxide in TK-6 cells; mutational spectrum of Cr in human lymphoblast cells; mutational spectra of radon in TK-6 cells; and the mutational spectra of smokeless tobacco. (CBS)
Date:
May 1, 1992
Creator:
Thilly, W.G.
Object Type:
Report
System:
The UNT Digital Library
Antiproton driven microfission-fusion on closer inspection
A closer look at the energetics of antiproton annihilation in real systems, coupled to hydrodynamics, materials strength, particle transport, equations of state, and related interactions is necessary to assess ultimate viability. The systematics of antiproton microfission-fusion are the subject of this analysis, as well as technology constraints.
Date:
January 1, 1992
Creator:
Wienke, B.R.
Object Type:
Article
System:
The UNT Digital Library
Mechanical strength and stability of lithium aluminate
Pacific Northwest Laboratory (PNL) investigated the strength and resistance to thermal shock of lithium aluminate annular pellets. The room temperature, axial compressive fracture strength of pellets made at Westinghouse Advanced Energy Systems (WAES) varied from 80 to 133 ksi. The strength at 430{degrees}C (806{degrees}F) was to 30 to 40% lower. The strength at 900{degrees}C (1652{degrees}F) showed a wide variation with one measurement near 90 ksi. These strength values are consistent with other data and predictions made in the literature when the grain size and porosity of the microstructure are taken into account. In diametral compression tests, the fracture strengths were much lower due to the existence of tensile stresses in some pellet regions from this type of loading. However, the fracture stresses were still generally higher than those reported in the literature; this fracture resistance probably reflects the better quality of the pellets tested in this study. Measurements on pellets made at PNL indicated lower strengths compared to the WAES material. This strength difference could be accounted for by different processing technologies: material made at PNL was cold-pressed and sintered with high porosity whereas the WAES material was isostatically hot-pressed with high density. Thermal shocking of the material by ramping …
Date:
June 1, 1992
Creator:
Brimhall, J.L.
Object Type:
Report
System:
The UNT Digital Library
Fundamental spectroscopic studies of carbenes and hydrocarbon radicals
This document details activities during this reporting period topics discussed are: The first spectroscopic identification of the HCCCO and DCCCO radicals; detection of new vibrationally excited states of the carbon chain radicals CCH and CCD and the three-membered carbene ring, cyclopropenylidene; determination of an accurate structure of the cumulene carbene H{sub 2}CCC; analysis the hyperfine structure in the SiC radical; and the undertaking of a systematic search for new sulfur bearing radicals.
Date:
May 1, 1992
Creator:
Thaddeus, P. & Gottlieb, C.
Object Type:
Report
System:
The UNT Digital Library
Integrated dry NO sub x /SO sub 2 emissions control system
The DOE Cooperative Agreement No. DE-FC22-91PC90550 dated March 11, 1991, Public Service Company of Colorado has prepared the following quarterly report for Phases I, IIA, and IIB of the Integrated Dry NO{sub x}SO{sub 2} Emissions Control System Project. This project includes low NO{sub x} burners with NO{sub x} ports (post firing air injection), humidification and dry sorbent injection.
Date:
February 15, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Recent experimental studies on Hadron showers produced in high energy muon-nucleus interactions
The Fermilab Tevatron Muon Experiment has analyzed the hadron showers of events resulting from the scattering of a muon beam (< E{sub {mu}} > = 490 GeV) off H{sub 2}, D{sub 2} and Xenon targets. The topics which will be discussed are: (1) space-time evolution of the hadronization process; (2) leading hadron distributions in the shadowing region; (3) rates and characteristics of 3-jet events. 23 refs.
Date:
May 1, 1992
Creator:
Morfin, J.
Object Type:
Article
System:
The UNT Digital Library
Fifth in situ vitrification engineering-scale test of simulated INEL buried waste sites
In September 1990, an engineering-scale in situ vitrification (ISV) test was conducted on sealed canisters containing a combined mixture of buried waste materials expected to be present at the Idaho National Engineering Laboratory (INEL) Subsurface Disposal Area (SDA). The test was part of a Pacific Northwest Laboratory (PNL) program to assist INEL in treatability studies of the potential application of ISV to mixed transuranic wastes at the INEL SDA. The purpose of this test was to determine the effect of a close-packed layer of sealed containers on ISV processing performance. Specific objectives included determining (1) the effect of releases from sealed containers on hood plenum pressure and temperature, (2) the release pressure ad temperatures of the sealed canisters, (3) the relationships between canister depressurization and melt encapsulation, (4) the resulting glass and soil quality, (5) the potential effects of thermal transport due to a canister layer, (6) the effects on particle entrainment of differing angles of approach for the ISV melt front, and (7) the effects of these canisters on the volatilization of voltatile and semivolatile contaminants into the hood plenum.
Date:
June 1, 1992
Creator:
Bergsman, T.M.; Shade, J.W. (Pacific Northwest Lab., Richland, WA (United States)) & Farnsworth, R.K. (EG and G Idaho, Inc., Idaho Falls, ID (United States))
Object Type:
Report
System:
The UNT Digital Library
Research and development of methods and tools for achieving and maintaining consensus processes in the face of change within and among government oversight agencies: Volume 1
This progress report summarizes our research activities under our consensus grant. In year four of the grant, we continued to capitalize on and benefit from historical events which drove our early emphasis on group process studies. Following our work on various procedures for bringing together groups such as the State and Tribal Government Working Group and the Stakeholders' Forum (both of which provide input to the Five-Year Waste Plan), we continue to observe these groups and collect data. We also began a configuration study involving the complex modeling of DOE's Office of Environmental Restoration and Waste Management (EM). Related to group process studies is the issue of the information requirements for individuals making decisions in consensus groups. Our information studies examined the requirements for decision-related information, frameworks for such information, and the effectiveness of information portrayed for decision making. However, we were able not only to continue studying consensus groups in action and related information issues, but also to focus considerable attention on the fundamental side of our research. The fundamental or basic research conducted in year four included: (1) expanding our literature database; (2) beginning the writing of the literature review summary document and the consensus guide; (3) developing …
Date:
March 1, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
DOE Office of Civilian Radioactive Waste Management (OCRWM) system studies digest
The Department of Energy (DOE) Office of Civilian Radioactive Waste Management (OCRWM) has sponsored system studies to support the evaluation of alternative configurations and operations for the Civilian Radioactive Waste Management System (CRWMS) and the development of system requirements and design specifications. These studies are generally directed toward evaluating the impacts of alternatives to the monitored retrievable storage (MRS) and fuel rod consolidation, waste form and characteristics sequences, cask and canister concepts, allocation of waste acceptance rights, and system throughput rates. The objectives of this document are: To present major system issues and related system element issues in a structured manner; to discuss key results of major system studies and explain the basis for certain current system assumptions; to summarize the scope and results of completed system studies that are still relevant at the time this document is published; and to provide the background needed for identifying and prioritizing system issues to be resolved. Consistent with the objectives, the document does not include low-level subsystem studies addressing system element issues that do not interact with overall system issues. The document is expected to be updated as major new system studies are completed and significant new results are available.
Date:
June 1, 1992
Creator:
McLeod, N. B. (Johnson and Associates Inc., Fairfax, Virginia (United States)); Nguyen, T. D.; Drexelius, R. (USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States)) & McKee, R. W. (Pacific Northwest Lab., Richland, WA (United States))
Object Type:
Report
System:
The UNT Digital Library
An overview of acoustic telemetry
Acoustic telemetry has been a dream of the drilling industry for the past 50 years. It offers the promise of data rates which are one-hundred times greater than existing technology. Such a system would open the door to true logging-while-drilling technology and bring enormous profits to its developers. The basic idea is to produce an encoded sound wave at the bottom of the well, let it propagate up the steel drillpipe, and extract the data from the signal at the surface. Unfortunately, substantial difficulties arise. The first difficult problem is to produce the sound wave. Since the most promising transmission wavelengths are about 20 feet, normal transducer efficiencies are quire low. Compounding this problem is the structural complexity of the bottomhole assembly and drillstring. For example, the acoustic impedance of the drillstring changes every 30 feet and produces an unusual scattering pattern in the acoustic transmission. This scattering pattern causes distortion of the signal and is often confused with signal attenuation. These problems are not intractable. Recent work has demonstrated that broad frequency bands exist which are capable of transmitting data at rates up to 100 bits per second. Our work has also identified the mechanism which is responsible for …
Date:
January 1, 1992
Creator:
Drumheller, D. S.
Object Type:
Article
System:
The UNT Digital Library
Physical characterization of magmatic liquids. [Ultrasonic and Brillouin Scattering Studies of Natural and Synthetic Silicates and Oxides]
This report describes a research project that was conducted from August 15, 1985 to February 28, 1992. The project was based on the ultrasonic studies of natural and synthetic silicate melts, and the study of Brillouin scattering of synthetic silicates and oxides. Measurements of the compressional wave velocity and attenuation can be established using the ultrasonic methods. Temperature dependences of silicates can be established by the Brillouin scattering. (MB)
Date:
June 5, 1992
Creator:
Manghnani, M.H.
Object Type:
Report
System:
The UNT Digital Library
Conduct of operations: The foundation of safety -- An overview
This paper discusses issues and approaches dealing with conceptualizing, implementing, and maintaining configuration control commensurate with the conduct of operations approach defined by DOE ORDER 5480.19. Specific topics reviewed will include key elements of assessments to determine the status quo such as assessment criteria, assessment personnel, and assessment scope; administrative programs to maintain the status quo such as organizational definition, responsibilities, interfaces, and priorities; oversight to determine control effectiveness via compliance and performance assessment.
Date:
May 1, 1992
Creator:
Willett, D.J. & Hertel, N.E.
Object Type:
Article
System:
The UNT Digital Library
Graphic values for some organic constitutents of beneficiated coal samples
Graphic techniques exist which can accurately predict values for calorific value, organic sulfur, and possibly other constituents of the organic portion of beneficiated coal sample fractions. These techniques also permit a determination of coal rank to be made without the use of the approximations required in the standard procedure. Fractions of IBC-101 with varying ash contents were produced by froth flotation. The various fractions were analyzed by the coal analysis laboratory and the particular data type was plotted in each case vs. the individual ash content of each fraction, using Lotus 123 and Freelace software packages. Such plots for calorific value and organic sulfur have, so far, been made. These curves and the information they contain are discussed in this report. A comparison of the graphic mineral matter value with the usual one calculated from the Parr approximation has been made. Eventually, the data may lead to an effective way to estimate inorganic carbon, hydrogen, nitrogen, and other organic constitents of coal. All data will be made available to researchers.
Date:
January 1, 1992
Creator:
Kohlenberger, L. B.
Object Type:
Report
System:
The UNT Digital Library
Superconductivity: Past, present, and future
This paper provides an overview of superconductor research and development activities, with emphasis on the potential of high-{Tc} materials for future applications. Superconductor applications are grouped under the following categories: electronics/instrumentation, bulk material/castings, research devices, industrial/commercial, electric power, and transportation/propulsion. Near-term applications are typically based on thin film and cast forms of high-{Tc} materials, while large-scale applications requiring long lengths of wire are considered intermediate to long term. As a major side benefit of high-{Tc} superconductor research, renewed interest is being focused on the use of low-{Tc} materials for large-scale applications.
Date:
January 1, 1992
Creator:
Uherka, K.L.
Object Type:
Article
System:
The UNT Digital Library
Investigation of Celotex trademark charring depths in the DT-18 shipping container
Celotex {trademark}, the insulating material used between the outer and inner containers of the DT-18 shipping package, undergoes decomposition, combustion, or both when heated to temperatures exceeding 150{degrees}C. Several DT-18 packages that had previously undergone hypothetical thermal accident testing were opened and Celotex {trademark} charring depths ranging from {1/2} to 1 {1/2} in. were recorded. The majority of char depth data taken was between 3/4 and 1 {1/4} in. One-dimensional HEATING 7.1 models of the DT-18 package were developed. HEATING predicts charring depths of 1 to 1 1/8 in., which are in good agreement with measured values. Both experimental and analytical data indicate that charring is fairly uniform over the DT-18 package. 7 refs.
Date:
March 1, 1992
Creator:
Anderson, J.C.
Object Type:
Report
System:
The UNT Digital Library
Edge-on ion irradiation of electron microscope specimens
A special technique is described for in situ transmission electron microscope (TEM) experiments involving simultaneous ion irradiation, in which the resultant phenomena are observed as in a cross-section TEM specimen. That is, instead of ion-irradiating the film or foil specimen normal to the major surfaces and observing in plan view (i.e., in the same direction), the specimen is irradiated edge-on (i.e., parallel to the major surfaces) and is observed normal to the depth direction with respect to the irradiation. The results of amorphization of Si, irradiated in this orientation by 1 or 1.5 MeV Kr, are presented and briefly compared with the usual plan view observations. The limitations of the technique are discussed and several experiments which might profitably employ this technique are suggested.
Date:
January 1, 1992
Creator:
Otero, M. P. & Allen, C. W.
Object Type:
Article
System:
The UNT Digital Library
ADIFOR: Automatic differentiation in a source translator environment
The numerical methods employed in the solution of many scientific computing problems require the computation of derivatives of a function f: R{sup n} {yields} R{sup m}. ADIFOR (Automatic Differentiation in FORtran) is a source transformation tool that accepts Fortran 77 code for the computation of a function and writes portable Fortran 77 code for the computation of the derivatives. In contrast to previous approaches, ADIFOR views automatic differentiation as a source transformation problem and employs the data analysis capabilities of the ParaScope Fortran programming environment. Experimental results show that ADIFOR can handle real- life codes and that ADIFOR-generated codes are competitive with divided-difference approximations of derivatives. In addition, studies suggest that the source-transformation approach to automatic differentation may improve the time required to compute derivatives by orders of magnitude.
Date:
January 1, 1992
Creator:
Bischof, C.; Corliss, G.; Griewank, A. (Argonne National Lab., IL (United States)) & Carle, A. (Rice Univ., Houston, TX (United States). Center for Research on Parallel Computation)
Object Type:
Article
System:
The UNT Digital Library
Current nuclear industry practices with regard to the integration of surveillances
Commercial nuclear industry practices regarding the integration of technical specification (TS) surveillance and maintenance activities are identified in this report. A questionnaire was developed and used to obtain current industry practices from NRC Regional personnel and INEL engineers with utility experience. Some of these practices indicate that the scheduling of TS surveillance and maintenance items could be more effectively coordinated. Also, must utilities do not formally consider risk implications when they are scheduling maintenance. Methodologies and approaches for proposing and evaluating changes to improve the integration of TS surveillance and maintenance activities have been identified for planned future work.
Date:
April 1, 1992
Creator:
Stewart, M. & Smith, C.
Object Type:
Report
System:
The UNT Digital Library
Analysis of erosion and transport of carbon impurity in the TFTR inner bumper limiter region
Carbon sputtering and transport on the TFTR inner graphite bumper limiter is investigated with the impurity transport code REDEP. Analysis is carried out for a series of ohmic discharges in TFTR. Predictions for Z{sub eff} in the core plasma agree well with in-situ experimental measurements. Run-away self-sputtering of carbon is predicted at low densities and high edge plasma temperatures when the limiter surface was purged of deuterium. Surface erosion and deposition is analyzed. In general, redeposition reduces the peak erosion by about a factor of five. Analysis is also carried out for a typical neutral beam heated discharge with a noncircular plasma. Spatial surface erosion and deposition profiles are compared qualitatively with beta backscattering measurements of metal deposition found on the limiter.
Date:
January 1, 1992
Creator:
Hua, T. Q. & Brooks, J. N.
Object Type:
Article
System:
The UNT Digital Library