Results 261 to 270 of about 202,827 (303)

Amplification primers of SSU rDNA for soil protists

Soil Biology and Biochemistry, 2014
We reviewed the literature and sequence data bases to evaluate primers used to identify SSU rDNA genes from protists commonly found in environmental soil samples. From our summary of the most common primers described in the literature, we performed in silico tests to determine their efficacy in identifying protists.
Sina M. Adl, Andrea Habura, Yana Eglit
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Frequency-Dependent Amplification of Unsaturated Surface Soil Layer

Journal of Geotechnical and Geoenvironmental Engineering, 2006
This paper presents a study of the amplification of SV waves obliquely incident on a surface soil layer overlying rock formation. Special attention is placed on the influence of the saturation states of the soil layer and the bedrock on the amplification in both horizontal and vertical directions as well as on the amplitude ratios between the two ...
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Seismic Site Effects of Soil Amplifications in Bangkok

2016
Thammasat International Journal of Science and Technology, 21 ...
Nakhorn Poovarodom, Amorntep Jirasakjamroonsri   +1 more
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Simplified inverse stiffness design for nonlinear soil amplification

Engineering Structures, 2002
Abstract An efficient stiffness design method for building structures is proposed in which nonlinear soil amplification and soil–structure interaction are taken into account in terms of equivalent linearization. A sway-rocking shear building model with appropriate ground impedances derived from both finite-element analysis and the equivalent ...
Takewaki, I, Fujii, N, Uetani, K
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SEISMIC AMPLIFICATION AT A SOFT SOIL SITE WITH LIQUEFIABLE LAYER

Journal of Earthquake Engineering, 2000
It is well known that local soil conditions play a key role in the amplification of earthquake waves. In particular, a liquefiable shallow soil layer may produce a significant influence on ground motion during strong earthquakes. In this paper, the response of a liquefiable site during the 1995 Kobe earthquake is studied using vertical array records ...
Yang, J., Sato, T., Li, XS
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Amplification Effects of Soil Stratification on Ground Stress Waves

Journal of Geotechnical and Geoenvironmental Engineering, 1999
An analytical model is presented for the prediction of the amplification of compressional and shear waves produced by an explosion, or any other shock impact on the surface of a stratified soil deposit. This amplification is caused by multiple reflections of waves between the ground surface and an underlying parallel soil layer possessing different ...
Fotis Rigas, Ioannis Sebos
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Case studies on soil amplification

2020
125
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Investigation of Soil Amplification in North Cyprus

2019
In this study, soil characteristics were investigated using four well-located earthquakes recorded by six accelerometers located in North Cyprus. The amplification values obtained according to the soil features were mapped in accordance with different frequencies using horizontal to vertical spectral ratio method.
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Transfer matrix approach to earthquake amplification through layered soils

Nuclear Engineering and Design, 1975
Abstract In this paper, the system transfer matrix for layered soil is obtained as the continued product of the transfer matrices for each individual layer. To determine the transfer function for the medium, the Laplace transformation is used to suppress the time variable in the governing equation, and the fact that the continuity of the shearing ...
Leon Y. Bahar, Alan M. Ebner
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Soil amplification and case studies for clayey soils

2020
ABSTRACT SOIL AMPLIFICATION AND CASE STUDIES FOR CLAYEY SOILS This report deals with the soil amplification and shows the effects of clayey soils on amplification with changing characteristics of soil structure and ground motion. For this purpose, the theory of wave propagation through an elastic medium has been briefly described.
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