A Model of Seismicity in a Block Medium

2013 ◽  
pp. 11-15
Author(s):  
A. A. Lyubushin
Keyword(s):  
Block Medium

scholarly journals Strains analysis at the wave propagation throught he contact layer of the elastic solids

2020 ◽  
pp. 89-96
Author(s):  
N.B. Chertova ◽  
◽  
Yu.V. Grinyaev ◽  
Keyword(s):  
Wave Propagation ◽  
Strain Distribution ◽  
Strain State ◽  
Strain Analysis ◽  
Contact Layer ◽  
Reflection Coefficients ◽  
Block Medium ◽  
Elastic Solids ◽  
Elastic Parameters ◽  
Analytical Expressions

The stress-strain state on the interface of the elastic solids is investigated. The studied interface presents a contact layer which is characterized by dimension and the set of physics mechanical parameters. The models of layered and block medium are used for the description this boundary. In the framework of these models the problem of elastic wave propagation through the interface is considered. Analytical expressions for the refraction and reflection coefficients allowing us to determine the strains on the interface and strains distribution in the contact layer are found. Corresponding strains amplitudes depending on the layer thickness are calculated at the different elastic parameters of contacting solids and boundary. The strain laws on the interface which is described by the layered and block medium models are analyzed. The regions of equivalent use these models are determined in the case of strain analysis on the boundary and the strain distribution in the contact layer.

The microenvironment created by non-blocking embryos in aggregates may rescue blocking embryos via cell–embryo adherent contacts

Zygote ◽  
1995 ◽  
Vol 3 (4) ◽  
pp. 313-324 ◽  
Author(s):  
Galina G. Sekirina ◽  
Irina E. Neganova
Keyword(s):  
Culture Medium ◽  
Inbred Mouse ◽  
Inbred Mouse Strain ◽  
Culture Conditions ◽  
Adherent Cell ◽  
Cell Block ◽  
Block Medium ◽  
Cell Stage ◽  
Rescue Effect ◽  
Cell Embryo

SummaryUnder our culture conditions, mouse embryos from the BALB/c inbred mouse strain develop successfully in culture only from the late 2-cell stage onwards (so-called 2-cell block), whether or not EDTA is added to the culture medium. (CBA × C57BL) F2 embryos do not exhibit a 2-cell block. Medium conditioned by culture of non-blocking embryos from the 2-cell to the 8-cell stage did not improve the development of blocking embryos, nor did co-culture of blocking and non-blocking embryos, with or without conditioned medium. On the other hand phytohaemagglutinin (PHA)-assisted aggregation of an early 2-cell BALB/c embryo with five surrounding non-blocking F2 embryos (2-cell or 8-cell) or five BALB/c 8-cell embryos allowed the early 2-cell BALB/c embryos to develop into blastocysts within 72 h. Aggregation of blocking BALB/c 2-cell embryos with each other had no ‘rescue’ effect. When blocking and non-blocking 2-cell embryos were aggregated together, an integrated blastocyst was formed; but when the early 2-cell BALB/c embryos were aggregated with non-blocking 8-cell embryos, the blocking embryos formed a separate small blastocyst, which nonetheless retained adherent contact with the non-blocking embryos throughout the culture period. Ultrastructural analysis showed that 2-cell embryos aggregated with the aid of PHA form close adherent cell contacts up to several micrometres in length.

Characteristic features of the deformation of a block medium during blasting

1990 ◽  
Vol 26 (2) ◽  
pp. 142-147 ◽  
Author(s):  
V. V. Adushkin ◽  
A. A. Spivak
Keyword(s):  
Block Medium ◽  
Characteristic Features

scholarly journals Modeling of elastic waves in a block medium based on equations of the Cosserat continuum

2014 ◽  
Vol 7 (1) ◽  
pp. 52-60 ◽  
Author(s):  
V.M. Sadovskii ◽  
O.V. Sadovskaya ◽  
M.A. Pokhabova
Keyword(s):  
Elastic Waves ◽  
Cosserat Continuum ◽  
Block Medium

scholarly journals METHODOLOGICAL APPROACHES TO DETERMINING THE STATE OF BLOCK SEISMOGENIC MEDIUM ON THE EXAMPLE OF THE 2008-2011 SEISMIC ACTIVATION IN THE CENTRAL PART OF THE BAIKAL RIFT

2019 ◽  
pp. 4-13
Author(s):  
P. G. Dyadkov ◽  
Y. M. Romanenko ◽  
M. P. Kozlova ◽  
L. V. Tsibizov ◽  
A. A. Duchkova
Keyword(s):  
Energy Release ◽  
Seismic Activity ◽  
Seismic Energy ◽  
B Value ◽  
The State ◽  
Joint Analysis ◽  
Block Medium ◽  
Seismic Regime ◽  
Methodological Approaches ◽  
Epicentral Region

Based on the joint analysis of the seismic regime parameters, such as anomalies of seismic energy release, b-value, seismic activity A10, approaches to assess the state of the block-seismic medium are proposed. The method validation was done for the example of preparation and development of seismic activity in 2008-2011 in the Central part of the Baikal rift, during which there were 2 strong M5.3 earthquakes. It was found that within 2 years before the strong Maximihinskoye Earthquake of 2008 in the Earth's crust of the epicentral region there is a transformation from softening to strengthening (consolidation) of the block medium. At the same time, in the neighboring region (the area of the Svyatoy Nos Peninsula), the opposite nature of the changes is observed.

Contour-zone deformation of mine working in a block medium

1996 ◽  
Vol 32 (5) ◽  
pp. 368-376 ◽  
Author(s):  
A. M. Alekseev ◽  
S. V. Dzhanashiya ◽  
G. G. Kocharyan ◽  
A. M. Kulyukin
Keyword(s):  
Mine Working ◽  
Block Medium ◽  
Zone Deformation
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