Abstract The influence of stress anisotropy ( K ) (i.e. the ratio between effective horizontal and vertical stresses) on shear behaviour soils has received significant attention in past studies, but how its depends different values plasticity index (PI) not been properly quantified. In this study, results a series undrained triaxial tests anisotropically consolidated soil at are reported , toge...

A roof fall hazard is still one of the major threats in underground mining industry. Each such type event always brings great risk to miners and causes serious interruptions process rock excavation. In general, possibility occurrence directly related local geology, presence horizontal stresses as well excavation method efficacy utilized support. Due complexity this process, it important continu...

The article provides the results of computational studies stress-strain state reinforced concrete structures chambers locks No. 15 and 16 Gorodetsky complex hydraulic structures, performed on basis a finite element model taking into account data long-term monitoring field surveys. Combinations loads that are pleasant in correspond to most unfavorable operating conditions. applied models take st...

In theory, plasmids can only be maintained in a population when the rate of horizontal gene transfer is larger than the combined effect of segregational loss and the decrease of fitness associated with plasmid carriage. Recent advances in genome sequencing have shown, however, that a large fraction of plasmids do not carry the genes necessary for conjugation or mobilization. So, how are so-call...

The effects of the modification a high-?' Ni-8.5Cr-5.5Al-1Ti (wt.%) model superalloy with 0.5 wt.% Y2O3, manufactured by laser powder-bed fusion, on microstructure and compressive creep resistance were investigated. Compared to base alloy, oxide-dispersion strengthened (ODS) alloy exhibits 8-10 times slower rates at 800 °C, over wide range stresses (35-250 MPa). Two regimes observed: diffusiona...

considering forage grass species, germination is one of the important stagesconcerning the growing stage that is often influenced by environmental stresses,particularly salinity and drought stresses. thus, this study aims to assess the effects ofsalinity and drought stresses on germination characteristics and seedling growth of desertwheatgrass, agropyron desertorum (fisch. ex link) schult. in ...

salinity and flooding are as two very important factors of soil degradation. they often occur together and cancause severe damage to plants. however, plant response to environmental stresses may vary with growth stage atwhich exposure occurs. a pot study was conducted in 2005-2006 in northern aq qala (northern iran) to studycombine effects of waterlogging and soil salinity at different growth s...

Normally, under natural conditions, plants are subjected to the influence of at least two different stress factors. The physiological responses of plants, exposed to two subsequent stress factors differing in their intensity or duration are reviewed. In the experiments presented here, the effects of some natural (water depletion, extreme temperatures), and anthropogenic (UV-B irradiation and he...

Axisymmetrical stresses in an infinitely long hollow isotropic circular cylinder (plane strain) quickly approach their asymptotic values as the external radius increases. This is not the case if the cylinder is even slightly anisotropic -asymptotic solutions (for an infinitely large external radius) do not exist. We find the mechanical meaning of this disparity by using formulas for radial and ...