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  • 1
    Keywords: Marine Geologie ; Erdöl ; Jura ; Brent Group ; Geologie ; Norwegen ; Schelf ; Geology ; North Sea ; Petroleum
    Description / Table of Contents: A. C. Morton, R. S. Haszeldine, M. R. Giles, and S. Brown: Geology of the Brent Group: Introduction / Geological Society, London, Special Publications, 61:1-2, doi:10.1144/GSL.SP.1992.061.01.01 --- J. M. Bowen: Exploration of the Brent Province / Geological Society, London, Special Publications, 61:3-14, doi:10.1144/GSL.SP.1992.061.01.02 --- P. C. Richards: An introduction to the Brent Group: a literature review / Geological Society, London, Special Publications, 61:15-26, doi:10.1144/GSL.SP.1992.061.01.03 --- Graham Yielding, Michael E. Badley, and Alan M. Roberts: The structural evolution of the Brent Province / Geological Society, London, Special Publications, 61:27-43, doi:10.1144/GSL.SP.1992.061.01.04 --- B. C. Mitchener, D. A. Lawrence, M. A. Partington, M. B. J. Bowman, and J. Gluyas: Brent Group: sequence stratigraphy and regional implications / Geological Society, London, Special Publications, 61:45-80, doi:10.1144/GSL.SP.1992.061.01.05 --- S. J. C. Cannon, M. R. Giles, M. F. Whitaker, P. M. Please, and S. V. Martin: A regional reassessment of the Brent Group, UK sector, North Sea / Geological Society, London, Special Publications, 61:81-107, doi:10.1144/GSL.SP.1992.061.01.06 --- W. Helland-Hansen, M. Ashton, L. Lømo, and R. Steel: Advance and retreat of the Brent delta: recent contributions to the depositional model / Geological Society, London, Special Publications, 61:109-127, doi:10.1144/GSL.SP.1992.061.01.07 --- Elaine S. Scott: The palaeoenvironments and dynamics of the Rannoch—Etive nearshore and coastal succession, Brent Group, northern North Sea / Geological Society, London, Special Publications, 61:129-147, doi:10.1144/GSL.SP.1992.061.01.08 --- Jan Alexander: A discussion of alluvial sandstone body characteristics related to variations in marine influence, Middle Jurassic of the Cleveland Basin, UK, and the implications for analogous Brent Group strata in the North Sea Basin / Geological Society, London, Special Publications, 61:149-167, doi:10.1144/GSL.SP.1992.061.01.09 --- M. F. Whitaker, M. R. Giles, and S. J. C. Cannon: Palynological review of the Brent Group, UK sector, north sea / Geological Society, London, Special Publications, 61:169-202, doi:10.1144/GSL.SP.1992.061.01.10 --- Gwydion Williams: Palynology as a palaeoenvironmental indicator in the Brent Group, northern North Sea / Geological Society, London, Special Publications, 61:203-212, doi:10.1144/GSL.SP.1992.061.01.11 --- Euan W. Mearns: Samarium-neodymium isotopic constraints on the provenance of the Brent Group / Geological Society, London, Special Publications, 61:213-225, doi:10.1144/GSL.SP.1992.061.01.12 --- A. C. Morton: Provenance of Brent Group sandstones: heavy mineral constraints / Geological Society, London, Special Publications, 61:227-244, doi:10.1144/GSL.SP.1992.061.01.13 --- K. Stattegger and A. C. Morton: Statistical analysis of garnet compositions and lithostratigraphic correlation: Brent Group sandstones of the Oseberg Field, northern North Sea / Geological Society, London, Special Publications, 61:245-262, doi:10.1144/GSL.SP.1992.061.01.14 --- Knut Bjørlykke, Tor Nedkvitne, Mogens Ramm, and Girish C. Saigal: Diagenetic processes in the Brent Group (Middle Jurassic) reservoirs of the North Sea: an overview / Geological Society, London, Special Publications, 61:263-287, doi:10.1144/GSL.SP.1992.061.01.15 --- M. R. Giles, S. Stevenson, S. V. Martin, S. J. C. Cannon, P. J. Hamilton, J. D. Marshall, and G. M. Samways: The reservoir properties and diagenesis of the Brent Group: a regional perspective / Geological Society, London, Special Publications, 61:289-327, doi:10.1144/GSL.SP.1992.061.01.16 --- J. Reed Glasmann: The fate of feldspar in Brent Group reservoirs, North Sea: a regional synthesis of diagenesis in shallow, intermediate, and deep burial environments / Geological Society, London, Special Publications, 61:329-350, doi:10.1144/GSL.SP.1992.061.01.17 --- Nicholas B. Harris: Burial diagenesis of Brent sandstones: a study of Statfjord, Hutton and Lyell fields / Geological Society, London, Special Publications, 61:351-375, doi:10.1144/GSL.SP.1992.061.01.18 --- P. J. Hamilton, M. R. Giles, and P. Ainsworth: K-Ar dating of illites in Brent Group reservoirs: a regional perspective / Geological Society, London, Special Publications, 61:377-400, doi:10.1144/GSL.SP.1992.061.01.19 --- R. Stuart Haszeldine, J. F. Brint, A. E. Fallick, P. J. Hamilton, and S. Brown: Open and restricted hydrologies in Brent Group diagenesis: North Sea / Geological Society, London, Special Publications, 61:401-419, doi:10.1144/GSL.SP.1992.061.01.20 --- A. J. C. Hogg, E. Sellier, and A. J. Jourdan: Cathodoluminescence of quartz cements in Brent Group sandstones, Alwyn South, UK North Sea / Geological Society, London, Special Publications, 61:421-440, doi:10.1144/GSL.SP.1992.061.01.21 --- Stephen Larter and Idar Horstad: Migration of petroleum into Brent Group reservoirs: some observations from the Gullfaks field, Tampen Spur area North Sea / Geological Society, London, Special Publications, 61:441-452, doi:10.1144/GSL.SP.1992.061.01.22 --- J. D. Kantorowicz, M. R. P. Eigner, S. E. Livera, F. S. Van Schijndel-Goester, and P. J. Hamilton: Integration of petroleum engineering studies of producing Brent Group fields to predict reservoir properties in the Pelican Field, UK North Sea / Geological Society, London, Special Publications, 61:453-469, doi:10.1144/GSL.SP.1992.061.01.23 --- Brian Moss: The petrophysical characteristics of the Brent sandstones / Geological Society, London, Special Publications, 61:471-496, doi:10.1144/GSL.SP.1992.061.01.24 --- Erratum --- Erratum: Brent Group: sequence stratigraphy and regional implications / Geological Society, London, Special Publications, 61:ERR, doi:10.1144/GSL.SP.1992.061.01.26
    Pages: Online-Ressource (506 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 0903317680
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 2427-2429 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe the design of a new system for the Czochralski growth of single crystals of intermetallic materials under ultrahigh vacuum conditions. Particular attention has been paid to an arrangement for very uniform movement of the pulling mechanism. We report the growth of large high-quality single crystals of MnSi.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 1990-09-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 1946-1956 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 4741-4755 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A low-resistance electrical contact is provided by a liquid metal in a small gap between the perimeter of a rotating disk (rotor) and a static surrounding surface (stator). The liquid metal extends radially inward on both sides of the rotor to free surfaces with an inert cover gas, and there is a strong axial magnetic field. This paper presents results for the shape of the free surface and for the liquid-metal velocity and pressure adjacent to the free surface. The results depend on the magnetic-field strength, the surface tension, the wetting angle at the free-surface–solid intersections, and the voltage difference between the stator and rotor. The copper stator and rotor are perfect conductors compared to the liquid metal. Two cases are considered, with and without electrically insulating coatings on the sides of the rotor.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 3713-3720 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper treats a free surface between a liquid metal and an inert gas in the presence of a magnetic field with arbitrary orientation relative to the free surface. The free surface intersects a perfectly conducting surface at rest and an insulated surface rotating about an axis which is perpendicular to both surfaces and which is far from the liquid-metal region. This problem models free surfaces in liquid-metal sliding electric contacts for motors and generators. There is a primary azimuthal liquid-metal velocity which is driven by the rotation of the insulated surface, and there is a secondary flow which involves radial and axial velocities and which is driven by the centrifugal force due to the primary velocity. The free-surface positions, pressures, and velocities are presented as functions of the magnetic-field orientation and strength.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This project developed an automated controller based on an artificial neural network and evaluated its applicability in a real-time environment. This capability was developed within the context of a small angle negative ion source on the Discharge Test Stand at Los Alamos. The controller processes information obtained from the beam current wave form, developing a figure of merit (fom) to determine the ion source operating conditions. The fom is composed of the magnitude of the beam current, the stability of operation, and the quietness of the beam. Using no knowledge of operating conditions, the controller begins by making of rough scan of the four-dimensional operating surface. This surface uses as independent variables the anode and cathode temperatures, the hydrogen flow rate, and the arc voltage. The dependent variable is the fom described above. Once the rough approximation of the surface has been determined, the network formulates a model from which it determines the best operating point. The controller takes the ion source to that operating point for a reality check. As real data is fed in, the model of the operating surface is updated until the neural network's model agrees with reality. The controller then uses a gradient ascent method to optimize the operation of the ion source. Initial tests of the controller indicate that it is remarkably capable. It has optimized the operation of the ion source on six different occasions bringing the beam to excellent quality and stability.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3185-3187 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The combination of zone refining and electrotransport techniques is considered with the aim of obtaining an improved method for the growth and ultrapurification of metallic crystals. A complete ultrahigh vacuum crystal growth system using induction heated vertical float zoning with up to 400 A of electrotransport current simultaneously passing through the molten zone has been developed. Preliminary tests on nickel show that the two techniques are indeed compatible and the purification process is substantially enhanced by their combination.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 10 (1994), S. 0 
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. Nepal is facing a serious problem of being unable to maintain soil fertility in agriculture and forestry. Land use practices initiated over the past 10–15 years have resulted in insufficient nutrient inputs, while biomass use and production have increased. Changes in forest soil fertility have resulted from intensive use of forest biomass for animal feed and collection of forest litter for use in agriculture. The agricultural fertility changes have resulted from intensifying annual crop rotations from 1.5 to 2.5 crops and insufficient inputs. The removal of biomass from the forest has curtailed the natural organic cycle by virtually eliminating nutrient inputs.The soils are very acidic and have little C, N, P and exchangeable bases, but have large amounts of active iron. Basic nutrients are not sustained in agriculture and differences in inputs and management between irrigated and rainfed agricultural systems are becoming visible. Irrigated fields show the largest cation content because of input from irrigation water. Rainfed agricultural sites, which receive the most nutrients (fertilizers and manure), have the highest pH values and C and N contents. All soil fertility conditions are marginal and put into question the long-term sustainability of current levels of production. Alterations in the cropping intensity are needed and the introduction of nitrogen fixing trees and crops seems to be the most viable option towards sustainability.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 46 (1991), S. 0 
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In efficient agricultural systems high production and high quality is expected throughout the year, but spatial and seasonal variation of biophysical variables can have a significant impact on the yield and quality of production. The yield and quality component of a forage field was monitored using statistical and Geographical Information System (GIS) techniques. The display of yield and forage quality in a spatial context proved to be very useful to the farmer since it allowed him to determine where in the field he obtained the best and worst production and whether such performance was consistent over the entire growing season. GIS is considered a new management tool that allows the spatial evaluation and presentation of production information in a new and innovative manner. Examples are provided to assist farmers in production accounting, to determine cause and effect relationships between management and production, to forecast production and to modify management to account for differences within the field.
    Type of Medium: Electronic Resource
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