نتایج جستجو برای: normal stresses
تعداد نتایج: 596251 فیلتر نتایج به سال:
In this paper, the Elzaki transform method is used for solving two-dimensional (2D) elasticity problems in plane polar coordinates. Airy stress function was used to express the stress compatibility equation as a biharmonic equation. Elzaki transform was applied with respect to the radial coordinate to a modified form of the stress compatibility equation, and the biharmonic equation simplified t...
One of the most significant manifestations of environmental stress in plants is the increased production of Reactive Oxygen Species (ROS). These ROS, if allowed to accumulate unchecked, can lead to cellular toxicity. A battery of antioxidant molecules is present in plants for keeping ROS levels under check and to maintain the cellular homeostasis under stress. Ascorbate peroxidase (APX) is a ke...
Extending the analysis of the evolution of pore humidity and carbonation presented in a preceding paper by Ferretti and Baz ̆ant, this paper analyzes the redistribution in time of vertical normal stresses across the multiple-leaf wall of ancient towers, using the example of collapsed Pavia Tower. It is shown that stress redistribution due to nonuniform shrinkage and nonuniform creep across the w...
Abstract STOP1 (sensitive to proton rhizotoxicity1) is a master transcription factor that governs the expression of set regulatory and structural genes involved in resistance aluminum low pH ( i.e ., proton) stresses Arabidopsis. However, mechanisms networks underlying STOP1-mediated are largely unclear. Here, we report low-pH severely inhibited root growth stop1 plants by suppressing meristem ...
Objective. The aim of the study is to determine dependence normal stress on radius curvature a flexible rod at different thicknesses. Method. A method was applied maximum stresses in longitudinally compressed high flexibility using elliptic integrals. Result. Modeling thin-walled performed ANSIS calculation complex. Conclusion. exact theory for calculating rods allows you value axial force duri...
many researchers have been efforted to identify the shape of distribution of stress and strength of castellated beam and base on that, offer a method for design that members. through this methods, comparing virendil method by simplicity and reasonable results, have been used widly. regardless from shortcoming of this method, there is two idea for distribution of stresses via primary bending in ...
S U M M A R Y We examine a variety of mechanisms that have been proposed as contributors to the stress fields expressed as intermediate-depth seismicity in subducting slabs. To this end, we study principal stress orientations for a global data set of 1900 intermediate-depth focal solutions, determining the patterns of events characterized primarily by downdip compression, downdip tension, or ne...
Environmental stresses such as drought, salinity, and cold are major adverse factors that significantly affect agricultural productivity. Protein phosphorylation/dephosphorylation is a major signalling event induced by osmotic stress in higher plants. Sucrose non-fermenting 1-related protein kinase 2 (SnRK2) family members play essential roles in the response to hyperosmotic stresses in plants....
Stress state of the surface layer in contact zone mating teeth cylindrical gears has been studied. It is established that stressed surfaces meshing pole characterized not only by stresses, but also deep equivalent stresses. shown under loading heterogeneous and changes with distance from surface. Analysis substantiation calculation model for diffusion surface-hardened are performed. Value coeff...
هدف این پژوهش به کارگیری skew-normal (sn) markov-switching(ms) garch جهت لحاظ نمودن چولگی در توزیع سریهای زمانی مالی است. انگیزه اصلی بیان این مدل آن است که روش متداول برای در نظر گرفتن عدم تقارن در مدل های normal(n) ms garch یعنی اضافه نمودن میانگین رژیم ها به مدل، منجر به ایجاد بازده های خود همبسته می گردد که امری نامطلوب است. جهت یک مقایسه کامل ، تمامی حالات ممکن مدل های sn ms garch و n ms g...
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