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  • 1
    Electronic Resource
    Electronic Resource
    Optical properties of the γ-phase yttrium trihydride YH3−δ (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 6798-6802 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The transmission spectra of thin films of γ-phase yttrium trihydride YHx, x≅2.87, are measured in the energy range 0.05–6 eV at room temperature. The measured quantities are used to determine the frequency-dependent index of refraction, extinction coefficient, dielectric function, and optical conductivity. In the energy range (E=0.2–6 eV), interband transition and impurity-related transitions dominate the optical properties. In the low-energy range (E=0.05–0.2 eV), hydrogen vibration modes dominate the optical properties. In addition, strong absorption due to free carriers is observed. This work also evaluates several parameters such as plasma frequency, effective carrier density, and donor ionization energy. The possible sources for optical features observed in the spectra are also described. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371754
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  • 2
    Electronic Resource
    Electronic Resource
    Cutaneous extravascular necrotizing granuloma (Churg Strauss granuloma) (1999)
    Oxford BSL : Blackwell Science Ltd
    Clinical and experimental dermatology 24 (1999), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Churg Strauss granuloma (cutaneous extravascular necrotizing granuloma) is a distinct entity which is associated with systemic immunoreactive or autoimmune diseases in a majority of cases. Typically, Churg Strauss granuloma presents as symmetrical papules or nodules on the extremities. There are two histological patterns: the classic pattern reveals palisading granuloma with central degenerated collagen, interspersed polymorphonuclear leukocytes, and leukocytoclastic debris; the focal basophilic necrosis pattern does not show palisading granuloma. We report two cases of Churg Strauss granuloma with different histopathological patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2230.1999.00452.x
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  • 3
    Electronic Resource
    Electronic Resource
    Diversity of potential microbial parasites colonizing sclerotia of Macrophomina phaseolina in soil (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 136-140 
    Details
    ISSN: 1432-0789
    Keywords: Key wordsMacrophomina phaseolina ; Antagonists ; Germination ; Agglutination ; Pseudomonas fluorescence ; Trichoderma harzianum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The colonization of Macrophomina phaseolina sclerotia by microbial parasites was evaluated in unsterilized field soil at different levels of soil moisture (0, –5, and –10 kPa) and temperature (20, 30, and 40°C). The maximum colonization of sclerotia was recorded in soil held at –5 or –10 kPa at 30–40°C. Trichoderma harzianum isolate 25–92 and Pseudomonas fluorescens isolate 4-92 were recorded as potential sclerotial parasites, and they significantly (P=0.05) reduced the germination of sclerotia by 60–63%. Cells of P. fluorescens and buffer-washed conidia of T. harzianum were completely agglutinated at 28°C with crude agglutinin of M. phaseolina. The ability of different antagonists to parasitize the sclerotia were correlated with the agglutination ability of the antagonists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384445
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  • 4
    Electronic Resource
    Electronic Resource
    Diversity of potential microbial parasites colonizing sclerotia of Macrophomina phaseolina in soil (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 136-140 
    Details
    ISSN: 1432-0789
    Keywords: Macrophomina phaseolina ; Antagonists ; Germination ; Agglutination ; Pseudomonas fluorescence ; Trichoderma harzianum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The colonization of Macrophomina phaseolina sclerotia by microbial parasites was evaluated in unsterilized field soil at different levels of soil moisture (0,-5, and-10 kPa) and temperature (20, 30, and 40°C). The maximum colonization of sclerotia was recorded in soil held at-5 or-10 kPa at 30–40°C. Trichoderma harzianum isolate 25–92 and Pseudomonas fluorescens isolate 4–92 were recorded as potential sclerotial parasites, and they significantly (P=0.05) reduced the germination of sclerotia by 60–63%. Cells of P. fluorescens and buffer-washed conidia of T. harzianum were completely agglutinated at 28°C with crude agglutinin of M. phaseolina. The ability of different antagonists to parasitize the sclerotia were correlated with the agglutination ability of the antagonists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384445
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Scale and context effects in the valuation of transport safety (1995)
    Springer
    Journal of risk and uncertainty 11 (1995), S. 183-203 
    Details
    ISSN: 1573-0476
    Keywords: value of life ; willingness to pay ; safety ; public transport ; large-scale accidents ; J17
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract How can willingness-to-pay-based values of safety for public transport modes, such as London's Underground railway system, be expected to relate to the corresponding value for road safety? This article reports results which suggest that such values should be set at a substantial premium in relation to their roads counterpart. However, this premium appears to derive entirely from considerations of control, voluntariness, and responsibility, and, contrary to popular wisdom, apparently owesnothing whatsoever to the possibility of large-scale “catastrophic” accidents on modes such as the Underground.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01207785
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  • 6
    Electronic Resource
    Electronic Resource
    An efficient method of solving the Navier-Stokes equations for flow control (1998)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 41 (1998), S. 1133-1151 
    Details
    ISSN: 0029-5981
    Keywords: flow control ; numerical solution of Navier-Stokes equation ; Karhunen-Loève Galerkin procedure ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A new method of solving the Navier-Stokes equations efficiently by reducing their number of modes is proposed in the present paper. It is based on the Karhunen-Loève decomposition which is a technique of obtaining empirical eigenfunctions from the experimental or numerical data of a system. Employing these empirical eigenfunctions as basis functions of a Galerkin procedure, one can a priori limit the function space considered to the smallest linear subspace that is sufficient to describe the observed phenomena, and consequently reduce the Navier-Stokes equation defined on a complicated geometry to a set of ordinary differential equations with a minimum degree of freedom. The present algorithm is well suited for the problems of flow control or optimization, where one has to compute the flow field repeatedly using the Navier-Stokes equation but one can also estimate the approximate solution space of the flow field based on the range of control variables. The low-dimensional dynamic model of viscous fluid flow derived by the present method is shown to produce accurate flow fields at a drastically reduced computational cost when compared with the finite difference solution of the Navier-Stokes equation. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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