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Theoretical modeling and experimental characterization of planar defects in Y sub 2 Ba sub 4 Cu sub 6+x O sub 14+x

Description: Crystallographic defects and phase transformations in the system Y{sub 2}Ba{sub 4}Cu{sub 6 + x}O{sub 14 + x}(0{le}{times}{le}4) are investigated by high resolution transmission electron microscopy (TEM) and static lattice, three dimensional Monte Carlo computer simulations. High resolution images of partially transformed (x = 2 to x = 1) material reveal a prevalence of CuO planar defects (stacking faults) associated with the transformation and an absence of disturbance to the perovskite Ba-Y-Ba… more
Date: November 1, 1990
Creator: Burmester, C. P.; Fendorf, M.; Gronsky, R. & Wille, L. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Annual review of cultural resource investigations by the Savannah River Archaeological Research Program, fiscal year 1990

Description: The Savannah River Archaeological Research Program (SRARP) of the South Carolina Institute of Archaeology and Anthropology, University of South Carolina, is funded through a direct contract with the United States Department of Energy to provide services required under federal law for the protection and management of archaeological resources on the Savannah River Site (SRS). Because the significance of most archaeological resources is dependent upon research potential, the SRARP is guided by res… more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Basic features of coherent radiation generated by relativistic charge bunches

Description: Radiation generated by relativistic charges can be analyzed and described in exquisite detail. One reason that such detailed analysis is possible is because the phases of radiated photons often are determined completely by the initial conditions of the relativistic charges and the radiating system. The phase relationships between the initial charges and the radiated photons represent coherence in the emitted radiation. A previous paper described how this coherence could affect the spatial and s… more
Date: November 1, 1990
Creator: Moran, M. J. & Chang, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Genetic changes in Mammalian cells transformed by helium cells

Description: Midterm Syrian Hamster embryo (SHE) cells were employed to study high LET-radiation induced tumorigenesis. Normal SHE cells (secondary passage) were irradiated with accelerated helium ions at an incident energy of 22 MeV/u (9--10 keV/{mu}m). Transformed clones were isolated after growth in soft agar of cells obtained from the foci of the initial monolayer plated postirradiation. To study the progression process of malignant transformation, the transformed clones were followed by monolayer subcu… more
Date: November 1, 1990
Creator: Durante, M.; Grossi, G. (Naples Univ. (Italy). Dipt. di Scienze Fisiche); Yang, T.C. & Roots, R. (Lawrence Berkeley Lab., CA (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An evaluation of the Nb-93(n,n prime )Nb-93m dosimeter reaction for ENDF/B-VI

Description: The Nb-93(n,n{prime})Nb-93m reaction plays an important role in nuclear energy applications. Because of its low threshold energy and relatively long half-life, it is a desirable reaction for long-term neutron fluence dosimetry in nuclear fission reactors. An evaluation of the differential cross section for this reaction was completed in 1985 by this laboratory as part of a comprehensive effort involving all neutron cross sections for niobium. The objective was to provide input for ENDF/B-VI. It… more
Date: November 1, 1990
Creator: Smith, D. L. & Geraldo, L. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Letter from Raymond B. Kelly III to D. Jack Davis, November 1, 1990]

Description: Photocopy of a letter from Raymond B. Kelly III to D. Jack Davis about the NTIEVA grant application to the Community Cultural Grants Program. Kelly writes that due to the program not meeting all requirements the request was not approved. A stamp notes that the document was received on November 5, 1990.
Date: November 1, 1990
Creator: Kelly, Raymond B., III
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
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Proof-of-Concept Oil Shale Facility Environmental Analysis Program

Description: The objectives of the Project are to demonstrate: (1) the Modified In- Situ (MIS) shale oil extraction process and (2) the application of CFBC technology using oil shale, coal and waste gas streams as fuels. The project will focus on evaluating and improving the efficiency and environmental performance of these technologies. The project will be modest by commercial standards. A 17-retort MIS system is planned in which two retorts will be processed simultaneously. Production of 1206-barrels per … more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vibration study of the APS magnet support assemblies

Description: Stability of the positron closed orbit is a requirement for successful operation of the Advanced Photon Source. The fact that vibration of the storage ring quadrupole magnets can lead to distortion of the positron closed orbit and to potentially unacceptable beam emittance growth provides the motivation for the subject studies. Low frequency vibrations can be controlled with steering magnets using feedback systems, provided the vibration amplitudes are within the dynamic range of the controller… more
Date: November 1, 1990
Creator: Wambsganss, M.W.; Jendrzejczyk, J.A. & Chen, S.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The structure and faceting behavior of tilt grain boundaries in aluminum

Description: This work describes a number of experimental observations on the structure and behavior of {Sigma}99 and other near-90{degree} <110> tilt boundaries in bicrystals of aluminum. The continuous bicrystal structure employed in these studies is based on the symmetry properties inherent in heteroepitaxial growth. A thin film grown in this geometry consists of intertwined grains surrounding each other but with only two grain orientations.
Date: November 1, 1990
Creator: Dahmen, U.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Iraq-Kuwait: U.N. Security Council Resolutions -- Texts and Votes

Description: The Iraqi invasion of Kuwait on August 1-2, 1990, set into motion a series of actions by the United Nations Security Council. Between August 2 and December 4, 1990, the Council adopted 12 resolutions. The numbers and votes of those resolutions are listed and the full text of each resolution is included in the this report.
Date: November 1, 1990
Creator: Browne, Marjorie Ann
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Compilation of Failure Data and Fault Tree Analysis for Geothermal Energy Conversion Systems

Description: The failure data for geothermal energy conversion facilities collected to date are compiled and tabled. These facilities have not accumulated sufficient production history to reliably estimated component failure rates. In addition, the improvements made in drilling technology in recent years may have made less pertinent the accumulation of data on well failures.
Date: November 1, 1990
Creator: Miller, F.L., Jr. & Zimmerman, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Regional aerosol deposition in human upper airways

Description: During the current reporting period experimental studies of aerosol deposition in replicate NOPL airways have carried out. A replicate model of a 4 week old infant nasal passage was constructed from MR scans. The model completes the age range from newborn'' to 4 years, there now being one child model for 4 different ages. Deposition studies have been performed with unattached radon progeny aerosols in collaboration with ITRI, Albuquerque, NM and NRPB, Chilton, UK. Overall measurements have been… more
Date: November 1, 1990
Creator: Swift, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Defect Dependence of Positron Lifetimes in Oxide Superconductors

Description: First principles calculations of the positron lifetimes are used to interpret experimental lifetime data for Ba{sub 1-x}K{sub x}BiO{sub 3}. The observed lifetimes are found to be very sensitive to the presence of defects in the sample. The temperature dependence of the lifetime and the change in lifetime with sample aging are both attributed to defects. The qualitative differences between metal vacancy defects and oxygen vacancy defects in metal oxides are also discussed. 6 refs., 2 figs.
Date: November 1, 1990
Creator: Sterne, P. A.; O'Brien, J. C.; Howell, R. H. & Kaiser, J. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Environmental audit, Bonneville Power Administration, lower Columbia area

Description: This report documents the results of the US Department of Energy's (DOE's) Environmental Audit conducted by the DOE Headquarters Office of Environmental Audit within the Bonneville Power Administration's (BPA's) Lower Columbia Area. The BPA facilities included in the Audit are the Ross Complex in Vancouver, Washington; the substations of North Bonneville, North Bonneville Annex, Camas, and Longview within the state of Washington; and the Acton and Troutdale Substations within the state of Orego… more
Date: November 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of 1988 WIPP (Waste Isolation Pilot Plant) Facility horizon gas flow measurements

Description: Numerous gas flow measurements have been made at the Waste Isolation Pilot Plant (WIPP) Facility horizon during 1988. All tests have been pressure decay or constant pressure tests from single boreholes drilled from the underground excavations. The test fluid has been nitrogen. The data have been interpreted as permeabilities and porosities by means of a transient numerical solution method. A closed-form steady-state approximation provides a reasonable order-of-magnitude permeability estimate. T… more
Date: November 1, 1990
Creator: Stormont, J.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical modeling of HF skywave radiation from antennas in irregular terrain

Description: The problem of computing the radiation pattern of an HF antenna sited in irregular terrain was investigated. The primary interest is in antennas for skywave communication, however ionospheric models were not considered. Several methods for modeling terrain effects are briefly reviewed. A geometrical optics model for arbitrary terrain is developed and results are compared with published results from solution of a Volterra integral equation for scattering by a Gaussian ridge. This report covers w… more
Date: November 1, 1990
Creator: Burke, G. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Error analysis of the chirp-z transform when implemented using waveform synthesizers and FFTs

Description: This report analyzes the effects of finite-precision arithmetic on discrete Fourier transforms (DFTs) calculated using the chirp-z transform algorithm. An introduction to the chirp-z transform is given together with a description of how the chirp-z transform is implemented in hardware. Equations for the effects of chirp rate errors, starting frequency errors, and starting phase errors on the frequency spectrum of the chirp-z transform are derived. Finally, the maximum possible errors in the chi… more
Date: November 1, 1990
Creator: Bielek, T. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Renewable energy plan of action for American Samoa

Description: American Samoa has no indigenous fossil fuels and is almost totally dependent for energy on seaborne petroleum. However, the seven Pacific Islands located at 14 degrees south latitude that constitute American Samoa have a wide variety of renewable resources with the potential for substituting for imported oil. Included as possible renewable energy conversion technologies are solar thermal, photovoltaics, wind, geothermal, ocean thermal, and waste-to-energy recovery. This report evaluates the po… more
Date: November 1, 1990
Creator: Shupe, J.W. (USDOE San Francisco Operations Office, Honolulu, HI (USA). Pacific Site Office) & Stevens, J.W. (Sandia National Labs., Albuquerque, NM (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Intramolecular energy transfer reactions in polymetallic

Description: This report is concerned with intramolecular, energy-transfer reactions. The concept of preparing synthetically a complex molecular species, capable of absorbing a photon at one metal center (antenna fragment), transferring that energy to a second metal center (reactive fragment) via a bridging ligand was first reported by our group in 1979. It is now apparent that a major emphasis in inorganic chemistry in the future will involve these types of molecular ensembles. Complexes discussed include … more
Date: November 1, 1990
Creator: Petersen, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrochemical control of brightener in acid copper sulfate plating solutions

Description: Electrochemical methods have been evaluated that attempt the indirect measurement of the effective concentration of a brighter additive in acid copper sulfate plating baths. The procedures all employed electrodeposition of copper on a platinum working electrode under carefully controlled conditions of mass transport, time, temperature, and potential, followed by the measurement of the charge that was required to strip the copper deposit from the working electrode. The amount of charge that was … more
Date: November 1, 1990
Creator: Bronson, M.J. (Allied-Signal Aerospace Co., Kansas City, MO (USA). Kansas City Div.) & Hawley, M.D. (Kansas State Univ., Manhattan, KS (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Project Records Information System (PRIS)

Description: The Project Records Information System (PRIS) is an interactive system developed for the Information Services Division (ISD) of Martin Marietta Energy Systems, Inc., to perform indexing, maintenance, and retrieval of information about Engineering project record documents for which they are responsible. This PRIS User's Manual provides instruction on the use of this system. This manual presents an overview of PRIS, describing the system's purpose; the data that it handles; functions it performs;… more
Date: November 1, 1990
Creator: Smith, P.S. & Schwarz, R.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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3 Dimensional radiation transport in dispersive media

Description: In plasmas the collective motion of free electrons affects the propagation of radiation by bending the light ray trajectory. The closer the light wave frequency is to the electron plasma frequency in value, the more pronounced the effect. We will present the results of radiation transport calculations in 3 spatial dimensions in the refractive plasma environment and compare the calculation to one done where the ray bending has been neglected (straight line ray paths). We also present the numeric… more
Date: November 1, 1990
Creator: Mayle, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Infrared spectroscopy of ionic clusters

Description: This thesis describes new experiments wherein the infrared vibrational predissociation spectra of a number of mass-selected ionic cluster systems have been obtained and analyzed in the 2600 to 4000 cm{sup {minus}1} region. The species studied include: the hydrated hydronium ions, H{sub 3}O{sup +} (H{sub 2}O){sub 3 {minus}10}, ammoniated ammonium ions, NH{sub 4}{sup +}(NH{sub 3}){sub 1 {minus}10} and cluster ions involving both water and ammonia around an ammonium ion core, (mixed clusters) NH{s… more
Date: November 1, 1990
Creator: Price, J.M. (California Univ., Berkeley, CA (USA). Dept. of Chemistry Lawrence Berkeley Lab., CA (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heavy metals in fish from streams near F-Area and H-Area seepage basins

Description: This report summarizes results of recent analyses of heavy metals in fish from Savannah River Site (SRS) streams near the F-Area and H-Area seepage basins. Fish were collected from headwater areas of Four Mile Creek and Pen Branch, from just below the H-Area seepage basin, and from three sites downstream in Four Mile Creek. These fish were analyzed for RCRA trace metals using standard EPA methods. Silver, arsenic, beryllium, cadmium, copper, nickel, lead, antimony, and thallium were all either … more
Date: November 1, 1990
Creator: Loehle, C. & Paller, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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