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Digitale Medien

Parallel 3-D Simulation of Ground Motion for the 1995 Kobe Earthquake: The Component Decomposition Approach (2000)

Furumura, T. ; Koketsu, K.

Springer

Pure and applied geophysics 157 (2000), S. 2047-2062

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ISSN: 1420-9136

Schlagwort(e): Key Words: 1995 Kobe earthquake, parallel computing, pseudospectral method, strong ground motion, 3-D simulation.

Quelle: Springer Online Journal Archives 1860-2000

Thema: Geologie und Paläontologie , Physik

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/PL00001074

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2

Digitale Medien

Binding of Calcium Ion to Lecithin Film (1962)

KIMIZUKA, H. ; KOKETSU, K.

[s.l.] : Nature Publishing Group

Nature 196 (1962), S. 995-996

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/196995b0

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3

Digitale Medien

Restoration of Membrane Excitability of Calcium-deficient Muscles by Anodal Polarization (1960)

KOKETSU, K. ; NODA, K.

[s.l.] : Nature Publishing Group

Nature 187 (1960), S. 243-244

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/187243a0

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4

Digitale Medien

Electrical Responses of Frog Spinal Ganglion Cells in Sodium-free Media (1958)

KOKETSU, K. ; CERF, J. A. ; NISHI, S.

[s.l.] : Nature Publishing Group

Nature 181 (1958), S. 703-704

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/181703a0

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5

Digitale Medien

Electrical Responses of Neuron Cell-Bodies in Sodium-free Media (1958)

KOKETSU, K. ; CERF, J. A. ; NISHI, S.

[s.l.] : Nature Publishing Group

Nature 181 (1958), S. 1798-1799

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/1811798b0

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6

Digitale Medien

Excitability and Phosphorylation of Muscle and Nerve in Sodium-free Hydrazinium Solution (1959)

ABOOD, L. G. ; KOKETSU, K.

[s.l.] : Nature Publishing Group

Nature 184 (1959), S. 725-726

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/184725a0

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7

Digitale Medien

Synaptic Transmission in a Sodium-free Medium (1958)

KOKETSU, K. ; NISHI, S.

[s.l.] : Nature Publishing Group

Nature 182 (1958), S. 887-887

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/182887a0

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8

Digitale Medien

Release of Calcium-45 from Frog Nerves during Electrical Activity (1961)

KOKETSU, K. ; MIYAMOTO, S.

[s.l.] : Nature Publishing Group

Nature 189 (1961), S. 402-403

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/189402a0

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9

Digitale Medien

Significance of Membrane Calcium in Calcium-free and Potassium-rich Media (1961)

KOKETSU, K. ; MIYAMOTO, S.

[s.l.] : Nature Publishing Group

Nature 189 (1961), S. 403-404

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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, ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/189403a0

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10

Digitale Medien

Outflux of Inorganic and Organic Phosphate during Membrane Depolarization of Excitable Tissues (1961)

ABOOD, L. G. ; KOKETSU, K. ; KOYAMA, I.

[s.l.] : Nature Publishing Group

Nature 191 (1961), S. 395-396

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [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 ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/191395a0

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