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  • 1995-1999  (2)
  • 1980-1984  (1)
Datenquelle
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Generation of SH-type waves due to non-uniformly moving stress-discontinuity in layered anisotropic elastic half-space (1983)
    Springer
    Acta mechanica 49 (1983), S. 209-220 
    Details
    ISSN: 1619-6937
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Summary A study is made of the generation of SH-type waves at the free surface of a layered anisotropic elastic medium due to a stress discontinuity moving with non-uniform velocity along the interface of the layered half-space. The exact solution for the displacement function is obtained by the Laplace and Fourier transforms method combined with the modified Cagniard method. Solution is discussed on the basis of ray theory. Formations of different wave pattern are also illustrated with figures. Some special cases are also derived.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01236352
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    In vitro anthelmintic activity of root-tuber extract of Flemingia vestita, an indigenous plant in Shillong, India (1997)
    Springer
    Parasitology research 83 (1997), S. 492-498 
    Details
    ISSN: 1432-1955
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The in vitro activity of root-tuber-peel extract of Flemingia vestita, an indigenous plant consumed by the natives in Northeast India, was tested against helminth parasites. Live parasites (nematode: Ascaris suum from pigs, A. lumbricoides from humans, Ascaridia galli and Heterakis gallinarum from domestic fowl; cestode: Raillietina echinobothrida from domestic fowl; trematode: Paramphistomum sp. from cattle) were collected in 0.9 % physiological buffered saline (PBS) and maintained at 37 ± 1 °C. In vitro treatment of the parasites with the crude extract (50 mg/ml) in PBS revealed complete immobilization of the trematode and cestode in about 43 and 20 min, respectively. However, the cuticle-covered nematodes did not show any change in physical activity and remained viable even after a long period of exposure to the extract. Exposure of R. echinobothrida to genistein (0.5 mg/ml), an active principle isolated from the root-tuber peel, caused spontaneous loss of movement (paralysis) in 4.5 h, which was slower than the time required for praziquantel, the reference flukicide and cestodicide. The treated parasites showed structural alteration in their tegumental architecture. This study suggests the vermifugal activity of this plant extract against trematodes and cestodes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s004360050286
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  • 3
    Digitale Medien
    Digitale Medien
    A Technique of Rainfall Assimilation for Dynamic Extended Range Monsoon Prediction (1999)
    Springer
    Meteorology and atmospheric physics 71 (1999), S. 157-168 
    Details
    ISSN: 1436-5065
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geographie , Physik
    Notizen: Summary ¶A methodology has been developed to assimilate satellite-measured rainfall during the initial phase of model integration for extended range monsoon prediction. The vertical profiles of latent heating corresponding to different rain rates have been derived from the model statistics. These heating rates have been assimilated through nudging in the thermodynamics equation of the model. This procedure of assimilating observed heating has corrected the simulation of heating location in the model and consequently removed the anomalous sinking motion over Indian landmass. With the correction of vertical circulation, both mean July rainfall over India and the distribution have improved. Interannual variability has been brought out for the years 1987 and 1988. In view of the availability of rainfall profile from Tropical Rain Measuring Mission (TRMM) there is a scope of adopting this method of assimilating observed rainfall, for extended range monsoon prediction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s007030050053
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