Raman scattering from binary GexSe1−x glasses under hydrostatic pressure shows onset of a steady increase in the frequency of modes of corner-sharing GeSe4 tetrahedral units when the external pressure P exceeds a threshold value Pc. The threshold pressure Pcsxd decreases with x in the 0.15,x,0.20 range, nearly vanishes in the 0.20,x,0.25 range, and then increases in the 0.25,x,1/3 range. These ...

We combine traction force data with Bayesian inversion to obtain an absolute estimate of the internal stress field of a cell monolayer. The method, Bayesian inversion stress microscopy, is validated using numerical simulations performed in a wide range of conditions. It is robust to changes in each ingredient of the underlying statistical model. Importantly, its accuracy does not depend on the ...

Leaf water potential, leaf relative water content, and relative transpiration of barley were determined daily under greenhouse conditions at 3 growth stages: tillering to boot, boot to heading, and heading to maturity. The leaf moisture characteristic curve (relative water content versus leaf water potential) was the same for leaves of the same age growing in the same environment for the first ...

The interest of the method of X-ray diffraction for residual stress measurement is in continuous progress due to the advances in theoretical research and the development of new equipment. Usually, the shift and broadening of a diffraction peak reveal respectively the macrostrain (or stress) and rnicrostrain. The limits of the X-ray provided by classical tubes in laboratory are its low intensity...

all the producing and assembling processes exert residual stress on the pieces that may lead to structural failure. therefore, calculating the residual stress in such structures has been common in recent years. in this article, distribution of temperature and residual stress resulting from arc welding in three-pass butt joint in p91 austenitic stainless steel pipes is calculated and estimated u...

Background: Psychological stress is associated with unhealthy lifestyles, including smoking. Moreover, religiousbeliefs can play a significant role in relieving mental disorders such as anxiety and stress. Due to the frequentexposure of medical students to stressful situations, this study was conducted with the aim to investigate the<sp...

In this paper three different approaches towards a continuum theory of fiber suspensions are discussed. The first one is the classical Thermodynamics of Irreversible Processes with internal variables. It derives constitutive equations for fiber suspensions on the basis of ONSAGERs phenomenological coefficients, which are related to the mechanical properties of the fibers. Secondly another metho...

background: heat stress is one of the most important consequences of occupational heat exposure worldwide. current heat stress indexes are not suitable for heat strain screening in developing countries due to their inherent and applied limitations. a new observation and subjective screening method is required that needs no instrument. in this study, a scale is developed based on the most import...

Semiconductor strain gauges were used to measure the internal strain along the axes of spherical and disk plaster specimens when subjected to lithotripter shock pulses. The pulses were produced by one of two lithotripters. The first source generates spherically diverging shock waves of peak pressure approximately 1 MPa at the surface of the specimen. For this source, the incident and first refl...