479 research outputs found
Importance of damage data from destructive earthquakes forseismic microzoning Damage distribution during the 1923 Kanto, Japan, earthquake
To verify the results of seismic microzoning and to improve techniques, the damage data of past destructive earthquakes is an important key reference. The damage data of the 1923 Kanto, Japan, earthquake in the epicentral region are collected and compiled to produce the most reliable and detailed damage map. The damage map is compared with the results from the existing damage assessment and is used to discuss revision of the site amplification evaluation
Atmospheric neutrino flux at INO, South Pole and Pyh\"asalmi
We present the calculation of the atmospheric neutrino fluxes for the
neutrino experiments proposed at INO, South Pole and Pyh\"asalmi. Neutrino
fluxes have been obtained using ATMNC, a simulation code for cosmic ray in the
atmosphere. Even using the same primary flux model and the interaction model,
the calculated atmospheric neutrino fluxes are different for the different
sites due to the geomagnetic field. The prediction of these fluxes in the
present paper would be quite useful in the experimental analysis.Comment: 12Pages,9Fig
Nonlinear Soil Properties Estimated from Strong Motion Accelerograms
A rational procedure is developed for estimating dynamic soil properties from strong motion accelerograms obtained only at the ground surface. The method consisting of spectrum analysis and multi-reflection analysis could permit evaluation of time histories of shear modulus versus shear strain in the soil during an earthquake. The method is applied to four sites where the soil profile is relatively simple and where several strong motion records are available. The analytical results show that (1) the first predominant period of surface soil increases with an increase in shear strain developed in the soil, (2) the strain-dependent shear moduli evaluated from strong motion records are in fairly good agreement with laboratory test results in a strain range from 10-5 to 10-3, and (3) the shear modulus ratio is better correlated with peak particle velocity at the ground surface than with peak acceleration
Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data
Using the ``modified DPMJET-III'' model explained in the previous paper, we
calculate the atmospheric neutrino flux. The calculation scheme is almost the
same as HKKM04 \cite{HKKM2004}, but the usage of the ``virtual detector'' is
improved to reduce the error due to it. Then we study the uncertainty of the
calculated atmospheric neutrino flux summarizing the uncertainties of
individual components of the simulation. The uncertainty of -production in
the interaction model is estimated by modifying FLUKA'97 and Fritiof 7.02 so
that they also reproduce the atmospheric muon flux data correctly, and the
calculation of the atmospheric neutrino flux with those modified interaction
models. The uncertainties of the flux ratio and zenith angle dependence of the
atmospheric neutrino flux are also studied
High pressure X-ray preionized TEMA-CO2 laser
The construction of a high-pressure (up to 20 atm) transversely excited CO2 laser using transverse X-ray preionization is described. High pressure operation was found to be greatly improved in comparison to UV-preionized systems. Homogeneous discharges have been achieved in the pressure range 5–20 atm, yielding a specific laser output in the order of 35 J/l
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