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Office of Scientific & Technical Information Technical Reports
2,159
Texas State Publications
320
Technical Report Archive and Image Library
263
Texas Attorney General Opinions
139
Texas Register
84
Congressional Research Service Reports
53
Office of Technology Assessment
46
Advisory Commission on Intergovernmental Relations
9
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8
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United States Department of Energy Grand Junction Office Reports
151
GJBX
143
Texas Register
84
Argonne National Laboratory Reports
40
Atomic Energy Commission Reports
39
Savannah River Laboratory Hydrogeochemical and Stream Sediment Reconnaissance
34
Texas Motor Vehicle Traffic Accident Summaries
33
Texas Preventable Disease News
29
NURE Aerial Gamma Ray and Magnetic Reconnaissance Survey of Maine and Portions of New York
23
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17
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3,088 Matching Results
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Ambient Pressure Effects on the Sputter Particle Distribution of Insulating Materials
The effect of ion bombardment on several grades of alumina was investigated. Changes in the electrical resistance of the substrate as a function of incoming ion energy were of particular interest. Attention was also paid to the sputter particle distribution as a function of ambient pressure. This distribution was found to be dependent on the ion to substrate mass ratio. In general, the distribution follows a curve of growth; approximating a cosine distribution at the lower pressures and mass ratio, becoming isotropic at higher pressures. Pressures in the range of 10/sup -2/ to 10/sup -4/ Pascals have been used along with mass ratios in the range of 0.40 to 1.3. Samples of up to 80 cm/sup 2/ were subjected to a 10 cm diameter ion beam at energies of up to 6.25 keV. Average ion current densities of 1ma/cm/sup 2/ were used. Substrate temperatures while subjected to the ion beam were also monitored.
Date:
July 1, 1985
Creator:
Glaser, J. W.
Object Type:
Article
System:
The UNT Digital Library
Amchitka Radiobiological Program Progress Report, January 1979-December 1979
The objective of the Amchitka Radiobiological Program for the period 1970-1979 was to determine the extent of radionuclide contamination from world-wide atmospheric fallout and from the detonation of three underground nuclear blasts on Amchitka Island. The objective is achieved, by the collection and radiological analyses of biological and environmental samples and by background radiation measurements. Leakage of radionuclides from the underground sites of the Amchitka nuclear detonations would be suspected if the contamination was significntly greater than would be expected from world fallout. An account of the program from July 1970 to December 1978 has been given in nine previous reports from the Laboratory of Radiation Ecology to the Nevada Operations Office of the US Department of Energy. This report is an account of the program for calendar year 1979. The results of analyses of the samples collected in 1979 lead to the same conclusions as in previous years; i.e., there is no evidence that the radionuclide contamination at Amchitka Island is greater than would be expected from world fallout except for a slight contamination of the Long Shot Mud Pits with tritium.
Date:
July 1, 1980
Creator:
Thornberg, L. D.; Sibley, T. H. & Nakatani, R. E.
Object Type:
Report
System:
The UNT Digital Library
Americium thermodynamic data for the EQ3/6 database
Existing thermodynamic data for aqueous and solid species of americium have been reviewed and collected in a form that can be used with the EQ3/6 database. Data that are important in solubility calculations for americium at a proposed Yucca Mountain nuclear waste repository were emphasized. Conflicting data exist for americium complexes with carbonates. Essentially no data are available for americium solids or complexes at temperatures greater than 25{sup 0}C. 17 references, 4 figures.
Date:
July 1, 1984
Creator:
Kerrisk, J.F.
Object Type:
Report
System:
The UNT Digital Library
Analyses of the impact of inservice inspection using a piping reliability model
This report presents the results of a study of the impact of inservice inspection (ISI) programs on the reliability of specific nuclear piping systems that have actually failed in service. Two major factors are considered in the ISI programs: one is the capability of detecting flaws; the other is the frequency of performing ISI. A probabilistic fracture mechanics model is used to estimate the reliability of two nuclear piping lines over the plant life as functions of the ISI programs. Examples chosen for the study are the PWR feedwater steam generator nozzle cracking incident and the BWR recirculation line safe-end cracking incident. The results show that an effective inservice inspection requires a suitable combination of flaw detection capability and inspection schedule. An augmented inspection schedule is required for piping with fast-growing flaws to ensure that the inspection is done before the flaws reach critical sizes. Also, the elimination of poor inspection teams through training and qualification testing can produce significant benefits to ISI effectiveness.
Date:
July 1, 1984
Creator:
Simonen, F.A. & Woo, H.H.
Object Type:
Report
System:
The UNT Digital Library
Analysis and evaluation in the production process and equipment area of the Low-Cost Solar Array Project
The solar cell metallization processes show a wide range of technical limitations, which influence solar cell performance. These limitations interact with the metallization pattern design, which is particularly critical for large square or round cells. To lay the basis for a process capability-cost-solar cell performance-value evaluation and trade-off study, the theoretical background of the metallization design-solar cell performance relationship was examined. Conclusions are presented. (WHK)
Date:
July 1, 1980
Creator:
Wolf, M.
Object Type:
Report
System:
The UNT Digital Library
Analysis of an induction linac driver system for inertial fusion
A linear induction accelerator that produces a beam of energetic (5 to 20 GeV) heavy (130 to 210 amu) ions is a prime candidate as a driver for inertial fusion. Continuing developments in sources for ions with charge state greater than unity allow a potentially large reduction in the driver cost and an increase in the driver efficiency. The use of high undepressed tunes (sigma/sub 0/ approx. = 85/sup 0/) and low depressed tunes (sigma approx. = 8.5/sup 0/) also contributes to a potentially large reduction in the driver cost. The efficiency and cost of the induction linac system are discussed as a function of output energy and pulse repetition frequency for several ion masses and charge states. The cost optimization code LIACEP, including accelerating module alternatives, transport modules, and scaling laws, is presented. Items with large cost-leverage are identified as a guide to future research activities and development of technology that can yield substantial reductions in the accelerator system cost and improvement in the accelerator system efficiency. Finally, a cost-effective strategy using heavy ion induction linacs in a development scenario for inertial fusion is presented. 34 refs., 6 figs., 7 tabs.
Date:
July 1, 1987
Creator:
Hovingh, J.; Brady, V. O.; Faltens, A.; Keefe, D. & Lee, E. P.
Object Type:
Report
System:
The UNT Digital Library
Analysis of data bases for health services research on dementia
This report offers different sources of data regarding different forms of dementia, as well as illustrations and applications in a different settings.
Date:
July 1986
Creator:
Liu, Korbin
Object Type:
Report
System:
The UNT Digital Library
Analysis of Fish Kills and Associated Water Quality Conditions in the Trinity River, Texas: [Part] 2. Results of Phase 1 Studies, 1985-86
Report documenting dead fish in the water and possible factors such as water quality in the Trinity River in Texas.
Date:
July 1988
Creator:
Davis, Jack R. & Bastian, Michael V.
Object Type:
Report
System:
The Portal to Texas History
Analysis of Long-Term Flows Resulting from Large-Scale Sodium-Water Reactions in an LMFBR Secondary System
Leaks in LMFBR steam generators cannot entirely be prevented; thus the steam generators and the intermediate heat transport system (IHTS) of an LMFBR must be designed to withstand the effects of the leaks. A large-scale leak which might result from a sudden break of a steam generator tube, and the resulting sodium-water reaction (SWR) can generate large pressure pulses that propagate through the IHTS and exert large forces on the piping supports. This paper discusses computer programs for analyzing long-term flow and thermal effects in an LMFBR secondary system resulting from large-scale steam generator leaks, and the status of the development of the codes.
Date:
July 1, 1984
Creator:
Shin, Y. W.; Chung, H.; Choi, U. S.; Wiedermann, A. H. & Ockert, C. E.
Object Type:
Article
System:
The UNT Digital Library
Analysis of potential used oil recovery from individuals. Final report
To assist the Department of Energy in its investigation of methods for recycling used motor oil, Market Facts conducted a telephone survey of individuals who change their own motor oil. The study examined the amount of oil used, oil change practices, oil disposal methods, and perceptions and attitudes toward used motor oil disposal and oil recycling. The results of this survey are presented in this report. The findings of this study confirm the generally held view that about half the vehicle households in the United States now do their own oil changes and additions. These do-it-yourselfers (DIY) households account for almost two-thirds of the motor oil consumed by all US households and produce about one-third of one billion gallons of used motor oil annually. At least half of this used motor oil, more than 170 million gallons, is returned to the environment in a form that pollutes the ground and endangers the water supply. Measures such as requiring information about proper disposal and the need for recycling used oil to be printed on motor oil containers have been taken in many states. The need for reminder advertising and reinforcement education and information and practical measures to ease the burden of …
Date:
July 1, 1981
Creator:
Gottlieb, M.
Object Type:
Report
System:
The UNT Digital Library
An Analysis of Recent Measurements of the Temperature of theCosmic Microwave Background Radiation
This paper presents an analysis of the results of recent temperature measurements of the cosmic microwave background radiation (CMBR). The observations for wavelengths longer than 0.1 cm are well fit by a blackbody spectrum at 2.74 {+-} 0.02 K; however, including the new data of Matsumoto et al. (1987) the result is no longer consistent with a Planckian spectrum. The data are described by a Thomson-distortion parameter u = 0.021 {+-} 0.002 and temperature 2.823 {+-} 0.010 K at the 68% confidence level. Fitting the low-frequency data to a Bose-Einstein spectral distortion yields a 95% confidence level upper limit of 1.4 x 10{sup -2} on the chemical potential {mu}{sub 0}. These limits on spectral distortions place restrictions on a number of potentially interesting sources of energy release to the CMBR, including the hot intergalactic medium proposed as the source of the X-ray background.
Date:
July 1, 1987
Creator:
Smoot, G.; Levin, S.M.; Witebsky, C.; De Amici, G. & Rephaeli, Y.
Object Type:
Article
System:
The UNT Digital Library
Analysis of sawtooth relaxation oscillations in tokamaks
Sawtooth relaxation oscillations are analyzed using the Kadomtsev's disruption model and a thermal relaxation model. The sawtooth period is found to be very sensitive to the thermal conduction loss. Qualitative agreement between these calculations and the sawtooth period observed in several tokamaks is demonstrated.
Date:
July 1, 1982
Creator:
Yamazaki, K.; McGuire, K. & Okabayashi, M.
Object Type:
Report
System:
The UNT Digital Library
Analysis of standard reference materials by absolute INAA
Three standard reference materials, flyash, soil, and ASI 4340 steel, were analyzed by a method of absolute instrumental neutron activation analysis (INAA). Two different light water pool-type reactors were used to produce equivalent analytical results even though the epithermal to thermal flux ratio in one reactor was higher than that in the other by a factor of two.
Date:
July 1, 1981
Creator:
Heft, R.E. & Koszykowski, R.F.
Object Type:
Article
System:
The UNT Digital Library
Analysis of the Decapole Systematic Error in the Dipoles and of the Correctors
A descriptive calculation from the Analysis of the Decapole Systematic Error in the Dipoles and of the Correctors
Date:
July 9, 1987
Creator:
Ruggiero, Alessandro G.
Object Type:
Report
System:
The UNT Digital Library
An analysis of the hydrologic effects of proposed test drilling in the Winema National Forest near Crater Lake, Oregon
This paper describes the results of a preliminary study on the hydrologic regime underlying the Crater Lake Caldera, Oregon. The study was performed to provide a basis for evaluating the potential for polluting Crater Lake by drilling exploratory boreholes on the flanks of the mountain. A simple conceptual model of the hydrologic regime was developed by synthesizing the data from the region surrounding the Caldera. Based on the conceptual model, a series of numerical simulations aimed at establishing the basic groundwater flow patterns under and surrounding the lake were performed. In addition to the numerical simulations, we used simple volumetric techniques for estimating the distance that drilling mud would migrate away from the borehole if drilling proceeded without drilling fluid returns. Based on our calculations that show the regional flow of groundwater will oppose the flow of drilling mud toward the lake, and based on our volumetric estimate of drilling mud migration, our study concludes that drilling without returns will not pollute Crater Lake, nor will it affect the hydrologic regime in the immediate vicinity of the Crater Lake Caldera.
Date:
July 1, 1987
Creator:
Sammel, E.A. & Benson, S.
Object Type:
Article
System:
The UNT Digital Library
Analysis of the Risk of Transporting Uranium Ore Concentrates by Truck
This report evaluates the risks involved with shipping uranium ore concentrates by truck in an attempt to provide some perspective on the system safety issues. The basic probabilistic risk evaluation methodology used in this study is similar to that employed by Pacific Northwest Laboratory (PNL) in a series of risk analyses on the transportation of potentially hazardous energy materials. The risk model has been constructed as a series of separate analysis steps to allow the system risk to be readily reevaluated as additional data become available or as postulated system characteristics change. The reslts of this analysis show that the risks to the public health and safety from yellowcake releases during a transportation accident are insignificant. Accidents involving truck shipments of yellowcake are expected to occur at a rate of about ten a year. However, only one-fifth of these accidents, or about two a year, are expected to cause a release of yellowcake to the environment. None of these accidents was estimated to produce any potential fatalities. The low concentration of radioactivity distributed throughout the material resulted in no significant increase in radiation doses above normal background levels to members of the general public.
Date:
July 1, 1981
Creator:
Geffen, C. A.
Object Type:
Report
System:
The UNT Digital Library
Analysis of the separation of protium from blanket tritium-product streams
The case is considered in which the blanket product stream has been purified to the point where only protium, tritium, and a small quantity of deuterium remain. A cryogenic distillation cascade concept developed specifically to handle this enrichment problem is shown. The concept is based on a series of distillation columns and equilibrators capable of producing a protium-rich stream containing less than 1000 appm T and a tritium-rich stream containing less than 2000 appm H. It is envisioned that both of these streams could be blended with streams of comparable composition in the mainstream position of the fuel cycle without further processing. The computational analysis of the cascade was based on a fixed arrangement of columns and equilibrators and a fixed number of theoretical plates per columns, since these features are less easily varied in an actual system than reflux ratios and flow rates. In order to test the flexibility of this conceptual enruchment system to adjust to variations of the H/T ratio in the feed, H/T values of 0.333, 1.00, and 3.00 were investigated.
Date:
July 1, 1981
Creator:
Misra, B. & Maroni, V.A.
Object Type:
Article
System:
The UNT Digital Library
Analysis of the transient compressible vapor flow in heat pipe
The transient compressible one-dimensional vapor flow dynamics in a heat pipe is modeled. The numerical results are obtained by using the implicit non-iterative Beam-Warming finite difference method. The model is tested for simulated heat pipe vapor flow and actual vapor flow in cylindrical heat pipes. A good comparison of the present transient results for the simulated heat pipe vapor flow with the previous results of a two-dimensional numerical model is achieved and the steady state results are in agreement with the existing experimental data. The transient behavior of the vapor flow under subsonic, sonic, and supersonic speeds and high mass flow rates are successfully predicted. The one-dimensional model also describes the vapor flow dynamics in cylindrical heat pipes at high temperatures.
Date:
July 1, 1989
Creator:
Jang, J. H.; Faghri, A. & Chang, W. S.
Object Type:
Report
System:
The UNT Digital Library
Analysis of the W. M. Keck Telescope Primary Mirror Control Loop
The Primary Mirror Active Control System (ACS) of the W. M. Keck Telescope has as its main function the maintenance of the mirror figure of the 36-segment primary under the changing effects of gravity, temperature, and other low frequency perturbations. The ACS is a multivariate control loop that can be represented in a diagonalized form, provided that segment actuator motions only excite oscillations in its corresponding whiffletree (tying an actuator to a mirror segment), with no coupling to the other whiffletrees in the same segment mirror. Since whiffletree oscillations are expected to occur at frequencies above the bandpass of the control system, the assumption is expected to be valid for the purpose of analyzing the stability and response of the ACS under the expected low frequency perturbations. The results of a one-dimensional simulation, justified by the diagonalized form of the problem, will be presented showing the conditions for stability, the system response to desired changes and the advantages of using feed-forward. A verification of the theoretical results will be presented for an actual actuator coupled to a sensor controlled by a one-dimensional version of the ACS software. Also based on the diagonalized form, a study of noise coupling, equivalent system …
Date:
July 1, 1989
Creator:
Llacer, J.; Jared, R. C. & Fuertes, J. M.
Object Type:
Article
System:
The UNT Digital Library
Analysis, Volume 6, Number 7, July 1985
Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on various spending and appropriation concerns in Texas.
Date:
July 1985
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Analysis, Volume 7, Number 7, July 1986
Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on transportation appropriations, biennial transportation spending, financing highways, DHPT expenditures, roads and traffic, prime targets for the legislature, and more.
Date:
July 1986
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Analysis, Volume 8, Number 4, July/August 1987
Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on property tax legislation, budget changes, economic development efforts, and more.
Date:
July 1987
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Analysis, Volume 9, Number 7, July 1988
Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on prospects for legislative reform, revenue "crisis" prospects, tapping federal dollars, workers' compensation, public school finance, public school dropouts, and more.
Date:
July 1988
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Analysis, Volume 10, Number 7, July 1989
Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on property tax exemptions, tax abatements, property valuation, valuation notices, tax payments, appraisal districts, taxpayer rights, school tax rollback, and more.
Date:
July 1989
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History