In a previous work, a mechanism was presented by which baryon asymmetry can be generated during inflation from elliptically polarized gravitons. Nonetheless, the mechanism only generated a realistic baryon asymmetry under special circumstances which requires an enhancement of the lepton number from an unspecified GUT. In this note we provide a stringy embedding of this mechanism through the Gre...

Magnetorheological fluids (MRFs) are composites of micron-sized and/or nano-sized Fe particles and nonmagnetic oils, their rheological properties change with changes in the magnetic field. To distinguish between material mechanical deterioration, we developed a durability test system without influence sealing bearing on MRFs. We used set rotors stators to create V-shaped MRF layer. However, dev...

in this study, forced-vibration analysis of a coupled system of single layered graphene sheets (slgss) subjected to the moving nano-particle is carried out based on nonlocal elasticity theory of orthotropic plate. two slgss are coupled with elastic medium which is simulated by pasternak and visco-pasternak models. using hamilton’s principle, governing differential equations of motion are derive...

In this study, based on nonlocal differential constitutive relations of Eringen, the first order shear deformation theory of plates (FSDT) is reformulated for vibration of nano-plates considering the initial geometric imperfection. The dynamic analog of the von Kármán nonlinear strain-displacement relations is used to derive equations of motion for the nano-plate. When dealing with nonlineariti...

Abstract This paper deals with the boundary force method to determine stress distribution in an infinite plate subjected uni-axial tension having elliptical or circular hole. The elasticity solution for a point is used as fundamental solution. conditions are satisfied terms of resultant forces. Stress obtained by validated against results from analytical equations. Traction free condition weakl...

Introduction: The use of zinc supplements can decrease somatic and visceral pains. Exercise also increases the pain tolerance. In recent years, production and use of nano metal particles such as nano ZnO for pharmaceutical, hygienic and industrial purposes is rapidly increasing, while studies about its effects on human health are limited. The aim of the present study was to compare the effec...

Nonlinear plate bending within Mindlin's strain gradient elasticity theory (SGT) is investigated by employing somewhat non-standard finite element methods. The main goal to compare the results provided geometrically nonlinear three-dimensional (3D) and Reissner–Mindlin theory, i.e., first-order shear deformation (FSDT), SGT. For 3D Green–Lagrange relations are adopted, while von Kármán strains ...