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  • 1
    Electronic Resource
    Electronic Resource
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 6 (1999), S. 588-590 
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 68 (1998), S. 79-98 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary Simulations replicating urbanization and/or different landscapes following the cessation of open-pit mining were performed with a non-hydrostatic meso-β-scale model. Except for cloud and precipitating particles the daily domain averages of the variables of state hardly differ under calm wind conditions. Nevertheless, the ‘single land-use changes’ which are associated with urbanization, open-pit mines or the flooding of open-pit mines may appreciably or even significantly affect the local processes of the atmospheric water-cycle over and downwind of the land-use changes. Of the three, urbanization affects the local weather the least significantly, and flooding the open-pit mines causes the most significant changes. Generally, the most significant differences (at 90% or better statistical-significance level) occur for the liquid- and solid-water substances, the soil-wetness-factors, and the vertical component of the wind-vectors. The last changes strongly influence the paths of cloud and precipitation formation by the interaction ofcloud-microphysics-dynamics. In contrast to all other quantities for which a land-use change causes significant differences, the differences between cloud and precipitating particles are often not reflected in the environs of the landuse change.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 71 (1999), S. 205-228 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary  Simulations alternatively assuming a real landscape with and without open-pit mines and grown settlements were performed with a non-hydrostatic meteorological model of the meso-β-scale to elucidate whether the atmospheric response to such land-use changes is sensitive to the direction and magnitude of geostrophic wind. The results of simulations with the same geostrophic wind conditions substantiate that the daily domain-averages of the variables of state hardly differ for the different landscape realizations, except for cloud- and precipitating particles. However, land-use changes may significantly affect the local conditions over and downwind of the altered surfaces. The significant differences in the cloud- and precipitating particles, however, are not bound to the surroundings of land-use changes. The vertical component of wind vector, which is modified by the different heating of converted land-use, strongly affects cloud- and precipitation formation by the interaction cloud microphysics-dynamics. The magnitude of atmospheric response changes under the various directions and speeds of geostrophic wind for most of the field quantities and fluxes.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract.  The changes in the atmospheric response (e.g., in the variables of state, the amount of cloud-and precipitating particles, the water- and energy fluxes) to concurrent land-use changes are exemplarly examined for various landscape scenarios since the cessation of open-pit mining. The principle of superposition is applied to detect areas where the atmospheric response is either enhanced or diminished according to concurrent land-use changes as compared to simple land-use changes. The results show that nonlinear behavior of a given quantity may occur in areas without significant changes in this quantity and that a quantity may be significantly changed without finding nonlinearity. Moreover, the concurrent land-use changes do not necessarily yield a stronger atmospheric response than simple land-use changes. In addition to the size of the patches, where land-use changes, the contrast in the hydrologic and thermal behavior of the changes is decisive in measuring the magnitude of the response. Enhancement and diminish ment seem also to depend on the land-use adjacent to the altered land-use.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Microsystem technologies 2 (1996), S. 56-62 
    ISSN: 1432-1858
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Technology
    Notes: Abstract the outstanding spectral and spatial characteristics of synchrotron radiation make it a powerful analytical tool in microstructure technology. We apply absorption spectroscopy to study foils of electroplated Permalloy (NiFe), and of nickel phosphorus, because they are of interest to microfabrication for their soft magnetic properties and their selective etching behaviour, respectively. In particular, we show that in the electroplated Permalloy foils Ni keeps the structure of pure Ni while Fe changes from b.c.c. to f.c.c. NiP foils become increasingly amorphous with growing P content. In this way, radial elemental distributions which determine magnetic or other properties can be monitored sensitively to improve electroplating process control, even in situ. We also measure the radial thickness profile of a gold layer sputtered on top of a chromium coated silicon wafer. This technique might be extended to measure a given layer in a multilayer structure selectively and non-destructively even when hidden or opaque.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Microsystem technologies 2 (1996), S. 56-62 
    ISSN: 1432-1858
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Technology
    Notes: Abstract  The outstanding spectral and spatial characteristics of synchrotron radiation make it a powerful analytical tool in microstructure technology. We apply absorption spectroscopy to study foils of electroplated Permalloy (NiFe), and of nickel phosphorus, because they are of interest to microfabrication for their soft magnetic properties and their selective etching behaviour, respectively. In particular, we show that in the electroplated Permalloy foils Ni keeps the structure of pure Ni while Fe changes from b.c.c. to f.c.c. NiP foils become increasingly amorphous with growing P content. In this way, radial elemental distributions which determine magnetic or other properties can be monitored sensitively to improve electroplating process control, even in situ. We also measure the radial thickness profile of a gold layer sputtered on top of a chromium coated silicon wafer. This technique might be extended to measure a given layer in a multilayer structure selectively and non-destructively even when hidden or opaque.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 65 (2000), S. 181-196 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The influence of surface heterogeneity on spatial distribution, temporal development, and on the domain-average of the ratio between sensible and latent heat-flux (Bowen-ratio) is investigated for synthetic landscapes of differing degrees of surface heterogeneity. In so doing, simulations are performed applying a 3-dimensional non-hydrostatic mesoscale model. The synthetic landscapes consist of patches of sandy loam covered by mixed forest and loamy soil covered by grass. The results of the numerical experiments substantiate that land-surface distributions will non-linearly influence the Bowen-ratio if patches of equal type exceed a certain size. Moreover, the heterogeneity of the upwind region may play a role. Similarity coefficients show that the surface type dominating a landscape does not necessarily determine the mean Bowen-ratio representative for this area. Thus, when applying the strategy of dominant surface type, the margin of error in the regional Bowen-ratio depends on the horizontal resolution of the model or on available data.
    Type of Medium: Electronic Resource
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