نتایج جستجو برای: artificial earthquake

تعداد نتایج: 317412  

2016
Z. N. Shaikh M. G. Shaikh

This paper describes the results of an extensive study on the seismic behavior of a structure with damper and without damper under different earthquake acceleration frequency like Earthquake Altadena, Earthquake Lucerne and Earthquake New Hall. It is observed through nonlinear time history analysis that maximum displacement, maximum base shear and maximum acceleration can be effectively reduced...

2011
Vladimir Graizer

Methods of site response analysis require theoretical and empirical testing and validation before they can be used in seismic hazard assessment. Comparison of site amplification function (SAF) calculated using earthquake data recorded by seismic arrays with SAF obtained using analytical approaches represent the most important tests of reliability of those methods. The Treasure Island (TI) downh...

Journal: :Circulation journal : official journal of the Japanese Circulation Society 2012
Makoto Nakano Masateru Kondo Yuji Wakayama Akiko Kawana Yuhi Hasebe Mohamed Abdel Shafee Koji Fukuda Hiroaki Shimokawa

BACKGROUND After the East Japan Earthquake disaster there may have been a deterioration of patients with cardiovascular diseases. METHODS AND RESULTS We examined the data from 189 consecutive patients implanted with cardiovascular devices for the 6-month period before and after the Earthquake. In 170 patients with defibrillators, the number who experienced tachyarrhythmias increased significa...

Journal: :Fukushima journal of medical science 2014
Hirobumi Mashiko

We describe the findings on the current state and challenges of pediatric psychiatry in Fukushima prefecture following the Great East Japan Earthquake. When examining the time elapsed after the earthquake, there is an impression that psychiatric problems become apparent in the early period after the earthquake in mothers who had demonstrated vulnerability in development and nurturing before the...

Journal: :The Journal of experimental biology 2005
John R B Lighton Frances D Duncan

There is anecdotal evidence for profound behavioral changes prior to and during earthquakes in many organisms, including arthropods such as ants. Behavioral or physiological analysis has often, in light of these reports, been proposed as a means of earthquake prediction. We report here a serendipitous study of the effect of the powerful Landers earthquake in the Mojave Desert, USA (Richter magn...

2004
F. Rolandone R. Bürgmann R. M. Nadeau

[1] Using the example of the 1992 M 7.3 Landers earthquake, we show that in the aftermath of a large earthquake the depth extent of aftershocks shows an immediate deepening from pre-earthquake levels, followed by a time-dependent postseismic shallowing. We use these seismic data to constrain the change in the depth of the seismic-aseismic transition with time throughout the earthquake cycle. Mo...

Journal: :CoRR 2014
Cinthya Mota-Hernandez Luis Esquivel-Rodriguez Rafael Alvarado-Corona

-Tectonic earthquakes of high magnitude can cause considerable losses in terms of human lives, economic and infrastructure, among others. According to an evaluation published by the U.S. Geological Survey, 30 is the number of earthquakes which have greatly impacted Mexico from the end of the XIX century to this one. Based upon data from the National Seismological Service, on the period between ...

2008
M. H. T. Rayhani

A numerical model was developed to simulate the response of two instrumented, centrifuge model tests on soft clay and to investigate the factors that affect the seismic ground response. The centrifuge tests simulated the behavior of a rectangular building on 30 m uniform and layered soft soils. Each test model was subjected to several earthquakelike shaking events at a centrifugal acceleration ...

2008
Florin Leon Gabriela M. Atanasiu Dan Gâlea

Natural hazards, and especially earthquakes, are often recurring phenomena. Therefore, there is a permanent need for solutions to reduce earthquake losses by developing technologies, procedures, knowledge, and tools for seismic design and rehabilitation of buildings and infrastructure. A key point to an effective decision making process that aims at mitigating their effects is building a model ...

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