نتایج جستجو برای: such as earthquakes

تعداد نتایج: 5969194  

Farhad Behnamfar Vahid Sharif,

Following the 1994 Northridge and 1995 Kobe earthquakes, most of modern structures damaged seriously or devastated totally despite the seismic codes of these countries that had been expected to bear advanced criteria for seismic design of structures. After extensive research, the most probable reason of those destructions was attributed to special specifications of near-field earthquakes. In th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم 1392

the history of plant’s used for mankind is as old as the start of humankind. initially, people used plants for their nutritional proposes but after the discovery of medicinal properties, this natural ?ora became a useful source of disease cure and health improvement across various human communities. berberis vulgaris is one of the medicinal plants used in iranian traditional medicine. berberis ...

2011
Roger Bilham Vinod K. Gaur

Although India has a long written record, the shaking intensity of few damaging earthquakes that occurred before AD 1800, can be quantified. Since reliable estimates of future shaking near planned nuclear power plants depend on the extrapolation of historical earthquake data spanning many centuries, estimates of seismic risk to the planned Jaitapur nuclear power plant assessed from a short data...

2009
Kristine M. Larson

GPS seismology uses convential geodetic models to analyze GPS data at high sampling rates, such as 1 Hz. GPS seismology results are shown for the Denali, San Simeon, Tokachi-oki, and Chuetsu earthquakes. Records for these earthquakes indicate that GPS is an excellent instrument for measuring large displacements near earthquake ruptures. GPS systems can be improved for seismic applications if th...

2011
Juan Carlos Villagrán

This chapter focuses on the impacts of natural phenomena such as earthquakes and hurricanes or typhoons in terms of fatalities and injuries. In particular, it frames such impacts in the context of human insecurity. Through a comparison of outcomes associated to natural events in developed and developing countries, the document puts forth the notion that developed countries are finding ways to e...

2010
Frederic Paik Schoenberg Annie Chu Alejandro Veen

5 [1] Modern earthquake catalogs are often described using spatial‐temporal point process 6 models such as the epidemic‐type aftershock sequence (ETAS) models of Ogata (1998). 7 Earthquake catalogs often have issues of incompleteness and other inaccuracies for 8 earthquakes of magnitude below a certain threshold, and such earthquakes are typically 9 removed prior to fitting a point process mode...

2016
Xiaoming Zhang Robert Shcherbakov

The occurrence of aftershocks is a signature of physical systems exhibiting relaxation phenomena. They are observed in various natural or experimental systems and usually obey several non-trivial empirical laws. Here we consider a cellular automaton realization of a nonlinear viscoelastic slider-block model in order to infer the physical mechanisms of triggering responsible for the occurrence o...

2013
Lasse Laurson Xavier Illa Stéphane Santucci Ken Tore Tallakstad Knut Jørgen Måløy Mikko J Alava

A multitude of systems ranging from the Barkhausen effect in ferromagnetic materials to plastic deformation and earthquakes respond to slow external driving by exhibiting intermittent, scale-free avalanche dynamics or crackling noise. The avalanches are power-law distributed in size, and have a typical average shape: these are the two most important signatures of avalanching systems. Here we sh...

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