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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 157 (2000), S. 2047-2062 
    ISSN: 1420-9136
    Keywords: Key Words: 1995 Kobe earthquake, parallel computing, pseudospectral method, strong ground motion, 3-D simulation.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —A new approach to parallel pseudospectral simulation of 3-D seismic wave propagation is developed based on component decomposition of the wavefield. Field quantities and equations of motion are distributed over three processors according to their relationship to the x-, y- and z-coordinates, and computation is carried out concurrently on each processor with inter-processor communications. The efficiency of this approach is evaluated by a theoretical estimate and actual benchmark computations. We then conduct a 3-D simulation of strong ground motion for the 1995 Kobe (Hyogo-ken Nanbu) earthquake in order to show the feasibility of the parallel pseudospectral method. The results of the simulation demonstrate that the complex 3-D structures of the subsurface medium and source fault greatly affect the strong ground motion on the surface.
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 995-996 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The radiotracer method using a soft p-emitter has proved very successful for the direct measurement of adsorption at the solution-air interface8. This technique was applied to study the adsorption of calcium ions (calcium-45) to a lecithin monolayer. The radioactive solution was introduced in a ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 243-244 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This concept was supported by the following experimental results on muscle fibres registering complete loss of excitability and reduced resting potential (40-20 mV.) in calcium-free Ringer solution (with or without ethylenediaminetetraacetic acid). In these fibres, it was possible to restore the ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 703-704 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cell-bodies in the spinal ganglion of the frog have characteristic properties as compared with the axonal node7, and it was therefore expected that specific effects of quaternary ammonium compounds could be revealed on the cell membrane. In the course of the investigation with these ions, it was ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 1798-1799 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A new series of experiments were performed to assess the effects on frog spinal ganglion cells of other related compounds which maintain the excitability of frog nerve fibres3 or crab muscle fibres4 deficient in sodium. The various solutions used contained, in addition to the amount of the drug ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 725-726 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sartorius muscles from Rana pipiens were immersed in sodium-free sucrose solution containing 224 mM sucrose, 1-8 mM calcium chloride, and 2 mM potassium chloride, for 30 minutes in order to eliminate the electrical activity, and then in the sodium-free hydrazinium solution consisting of 112 mM ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 887-887 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nerve sartorius preparations of frogs (Rana pipiens) were used. The sodium-free hydrazinium solution contained 2 mM potassium chloride, 1.8 mM calcium chloride with various amounts of hydrazine (Eastman) and sufficient sucrose to maintain iso-tonicity. Both the hydrazine base and the final solution ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 189 (1961), S. 402-403 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experimental results reported here, however, clearly demonstrate that the release of calcium-45 loaded on nerve fibres apparently increases during electrical activity, suggesting that production of action potentials in muscles underlies the release of calcium at least in part. The discrepancy ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 189 (1961), S. 403-404 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Isolated frog sartorius muscle was soaked in Ringer containing calcium-45 for 2 hr. at room temperature. After washing the muscles for 20 sec. in Ringer's solution, the time course of the output of calcium-45 into normal Ringer and the test solutions was observed for 4 hr. During this procedure, ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 395-396 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Isolated frog sartorius muscle was immersed in frog Ringer solution containing phosphorus-32 (carrier-free orthophosphate, 25 μc./ml.) for 2 hr. at room temperature (25 C.). In general, five paired muscles were used for each control and experimental run. The muscles were then washed in Ringer ...
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