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S. G. Bhargavi 《Journal of Astrophysics and Astronomy》2002,23(1-2):123-127
This talk focuses on the various aspects we learnt from multiband observations of GRBs both, before and during the afterglow
era. A statistical analysis to estimate the probable redshifts of host galaxies using the luminosity function of GRBs compatible
with both the afterglow redshift data as well as the overall population of GRBs is discussed. We then address the question
whether the observed fields of GRBs with precise localizations from third Inter-Planetary Network (IPN3) contain suitable candidates for their host galaxies. 相似文献
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Natural Hazards - A nonlinear dynamic analysis method in earthquake-resistant design requires real-time ground motion records. However, a definite criterion is required for ground motion selection.... 相似文献
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In this study, a total of 115,246 ground motions recorded during earthquakes of Moment magnitudes ranging from M_w 5.0 to M_w 9.0 are analyzed statistically. A total of 21 ground motion parameters characterising the recorded acceleration time histories are used in the analysis. Classification of these parameters through statistical correlation is reported and a parameter called "distance from zero-amplitude axis," or dZ-A, is formulated in the principal component space. The ability for dZ-A to rate the damage potentials of strong motion records is evaluated through correlation of dZ-A with Japan Meteorological Agency(JMA) instrumental seismic intensities. This parameter can be used to rate damage potential of any strong motion record irrespective of the magnitude and location of the earthquake. It can also be used in selecting ground motion records of appropriate damage potential in seismic design and probabilistic analysis. 相似文献
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