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  • 1
    Schlagwort(e): Grundwasserleiter ; Hydrogeologie ; Kristallines Gestein ; Africa ; Aquifers ; Aquifères - Afrique ; Hidrogeologia ; Hydrogéologie - Afrique ; Rocks, Crystalline
    Beschreibung / Inhaltsverzeichnis: E. P. Wright: The hydrogeology of crystalline basement aquifers in Africa / Geological Society, London, Special Publications, 66:1-27, doi:10.1144/GSL.SP.1992.066.01.01 --- R. M. Key: An introduction to the crystalline basement of Africa / Geological Society, London, Special Publications, 66:29-57, doi:10.1144/GSL.SP.1992.066.01.02 --- F. A. K. Farquharson and A. Bullock: The hydrology of basement complex regions of Africa with particular reference to southern Africa / Geological Society, London, Special Publications, 66:59-76, doi:10.1144/GSL.SP.1992.066.01.03 --- D. Greenbaum: Structural influences on the occurrence of groundwater in SE Zimbabwe / Geological Society, London, Special Publications, 66:77-85, doi:10.1144/GSL.SP.1992.066.01.04 --- Eduard Boeckh: An exploration strategy for higher-yield boreholes in the West African crystalline basement / Geological Society, London, Special Publications, 66:87-100, doi:10.1144/GSL.SP.1992.066.01.05 --- M. J. McFarlane: Groundwater movement and water chemistry associated with weathering profiles of the African surface in parts of Malawi / Geological Society, London, Special Publications, 66:101-129, doi:10.1144/GSL.SP.1992.066.01.06 --- M. J. McFarlane, P. J. Chilton, and M. A. Lewis: Geomorphological controls on borehole yields: a statistical study in an area of basement rocks in central Malawi / Geological Society, London, Special Publications, 66:131-154, doi:10.1144/GSL.SP.1992.066.01.07 --- J. R. T. Hazell, C. R. Cratchley, and C. R. C. Jones: The hydrogeology of crystalline aquifers in northern Nigeria and geophysical techniques used in their exploration / Geological Society, London, Special Publications, 66:155-182, doi:10.1144/GSL.SP.1992.066.01.08 --- R. D. Barker, C. C. White, and J. F. T. Houston: Borehole siting in an African accelerated drought relief project / Geological Society, London, Special Publications, 66:183-201, doi:10.1144/GSL.SP.1992.066.01.09 --- R. M. Carruthers and I. F. Smith: The use of ground electrical survey methods for siting water-supply boreholes in shallow crystalline basement terrains / Geological Society, London, Special Publications, 66:203-220, doi:10.1144/GSL.SP.1992.066.01.10 --- R. Herbert, J. A. Barker, and R. Kitching: New approaches to pumping test interpretation for dug wells constructed on hard rock aquifers / Geological Society, London, Special Publications, 66:221-242, doi:10.1144/GSL.SP.1992.066.01.11 --- John Houston: Rural water supplies: comparative case histories from Nigeria and Zimbabwe / Geological Society, London, Special Publications, 66:243-257, doi:10.1144/GSL.SP.1992.066.01.12
    Seiten: Online-Ressource (VII, 264 Seiten) , Diagramme, Karten
    ISBN: 090331777X
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 67 (1963), S. 1789-1793 
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 7240-7243 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We present a numerical investigation of all-optical switching of solitons in two- and three-core nonlinear fiber couplers. Both self-switching of solitons and phase-sensitive switching are considered. The extension of the results to multicore couplers is briefly discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 3962-3971 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Combined Brillouin light-scattering (BLS) and microwave pumping techniques were used to measure the second-order spin-wave instability threshold microwave field amplitudes and characterize the critical modes for ferromagnetic resonance (FMR) saturation in 4.15 μm-thick yttrium iron garnet films at 8.47 GHz with the static magnetic field in-plane. To the best of our knowledge, this work represents the first BLS measurements for second-order FMR saturation processes in ferrite materials. Several new results were obtained: (1) A new type of butterfly curve for second-order processes. (2) Strong scattering from modes at low wave numbers in the 104 rad/cm range. (3) An observed in-plane propagation direction for these low wave number modes at 90° to the in-plane static field direction. These results differ significantly from the behavior expected from the bulk sample instability theories of Suhl and Schlömann, which predict critical modes at wave numbers and propagation directions in the 105–106 rad/cm and 0° ranges, respectively, and a sharp cusplike response centered at FMR. These results indicate that significant modifications of the bulk theory, which take into account the real modes supported by the film, are needed to realistically model second-order instability processes in films. © 1996 American Institute of Physics.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Analytical chemistry 21 (1949), S. 596-597 
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Analytical chemistry 22 (1950), S. 1516-1518 
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 172-174 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We propose and examine the characteristics of a new device called a soliton coupler which exchanges energy between two adjacent waveguides by transfer of spatial solitons.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1144-1146 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Fluence-induced changes in absorption of a semiconductor-doped-glass directional coupler have resulted in nonlinear optical switching on a picosecond time scale. The functional dependence on the incident fluence confirms that the switching is dominated by absorption saturation.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 215-217 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We show numerically that solitary waves, localized in two transverse dimensions, are emitted when a high-power Gaussian beam is launched into a slab waveguide in which the cladding displays a saturable self-focusing nonlinearity.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 2127-2129 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We present numerical calculations of the material figure of merit for a variety of bulk semiconductors at room temperature. For efficient switching to be possible in a half-beat-length nonlinear directional coupler, a minimum material requirement is that the figure of merit should exceed unity.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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