نتایج جستجو برای: imposed strain

تعداد نتایج: 253056  

Journal: :Analysis and Mathematical Physics 2022

Abstract Starting from a Lagrangian action functional for two scalar fields we construct, by variational methods, the Laplacian Green function bounded domain and an appropriate stress tensor. By further variation, imposed given vector field, arrive at interior version of Hadamard formula, previously considered P. Garabedian. It gives variation in terms pairing between tensor strain domain, this...

Journal: :Fatigue & Fracture of Engineering Materials & Structures 2023

The influence of pre-strain on the tensile and fatigue properties a dual phase DP600 steel was studied. material pre-strained by uni-axial tension in rolling transverse direction. Thereafter, specimens were cut from deformed plates parallel or orthogonal to It found that increases yield strength. Results suggested strain path change primarily affects elastic-plastic transition during early stag...

Journal: :Journal of bacteriology 1992
M Kitada K Horikoshi

The effects of imposed proton motive force on the kinetic properties of the alkalophilic Bacillus sp. strain N-6 Na+/H+ antiport system have been studied by looking at the effect of delta psi (membrane potential, interior negative) and/or delta pH (proton gradient, interior alkaline) on Na+ efflux or H+ influx in right-side-out membrane vesicles. Imposed delta psi increased the Na+ efflux rate ...

2006
Juan Gomez Cemal Basaran David Kofke

Experimental observations of an increase in resistance with decreasing specimen size and under the presence of non-uniform plastic deformation fields have pushed the development for small scale plasticity theories since the early 90’s. The observed phenomenon has been explained in terms of an accumulation of a density of geometrically necessary dislocations, which is required in order to accomm...

Journal: :Computer methods in biomechanics and biomedical engineering 2013
R Allena J J Muñoz D Aubry

During the early stages of gastrulation in Drosophila embryo, the epithelial cells composing the single tissue layer of the egg undergo large strains and displacements. These movements have been usually modelled by decomposing the total deformation gradient in an (imposed or strain/stress dependent) active part and a passive response. Although the influence of the chemical and genetic activity ...

2017
Kristina Beblo-Vranesevic Maria Bohmeier Alexandra K Perras Petra Schwendner Elke Rabbow Christine Moissl-Eichinger Charles S Cockell Rüdiger Pukall Pauline Vannier Viggo T Marteinsson Euan P Monaghan Pascale Ehrenfreund Laura Garcia-Descalzo Felipe Gómez Moustafa Malki Ricardo Amils Frédéric Gaboyer Frances Westall Patricia Cabezas Nicolas Walter Petra Rettberg

The limits of life of aerobic microorganisms are well understood, but the responses of anaerobic microorganisms to individual and combined extreme stressors are less well known. Motivated by an interest in understanding the survivability of anaerobic microorganisms under Martian conditions, we investigated the responses of a new isolate, Yersinia intermedia MASE-LG-1 to individual and combined ...

2013
M. Z. Bazant

We analyze the steady-state behavior of a general mathematical model for reversible galvanic cells, such as redox flow cells, reversible solid oxide fuel cells, and rechargeable batteries. We consider not only operation in the galvanic discharging mode, spontaneously generating a positive current against an external load, but also operation in two modes which require a net input of electrical e...

Journal: :تحقیقات نظام سلامت 0
حبیب اله دهقان مربی، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران احسان اله حبیبی دانشیار، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران بهنام خدارحمی دانشجوی کارشناسی ارشد، کمیته تحقیقات دانشجویی، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران حسینعلی یوسفی مربی، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران اکبر حسن زاده مربی، مرکز تحقیقات امنیت غذایی، گروه آمار زیستی و اپیدمیولوژی، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

background: heat stress is a common and usual problem in industries. several indices, including wet bulb globe temperature (wbgt), are used to evaluate heat stress. however, wbgt index has limitations such as high cost and response time. it is not thus suitable as a screening tool. heat strain scoring index (hssi) is also an observational-judgmental technique that has been developed for primary...

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