Sharp fronts observed by Chandra satellite between dense cool cluster cores moving with near-sonic velocity through the hotter intergalactic gas, require strong suppression of thermal conductivity across the boundary. This may be due to magnetic fields tangential to the contact surface separating the two plasma components. We point out that a super-Alfvenic motion of a plasma cloud (a core of a...

In this paper, a weighted regularization method for the time-harmonic Maxwell equations with perfect conducting or impedance boundary condition in composite materials is presented. The computational domain Ω is the union of polygonal or polyhedral subdomains made of different materials. As a result, the electromagnetic field presents singularities near geometric singularities, which are the int...

We construct finite element approximations of the Levi-Civita connection and its curvature on triangulations oriented two-dimensional manifolds. Our construction relies Regge elements, which are piecewise polynomial symmetric (0,2)-tensor fields possessing single-valued tangential-tangential components along interfaces. When used to discretize Riemannian metric tensor, these tensor do not posse...

background: pulmonary complications of radiation to breast are inevitable, while its incidence and severity are not clear. one of the methods to assess pulmonary complications is spirometry. the influence of radiotherapy on pulmonary function test and the factors affecting it have been assessed in this study. methods: breast cancer patients with stage ii and iii (based on tnm staging), underwen...

When we manipulate small objects, our fingertips are generally subjected to tangential torques about the axis normal to the grasp surface in addition to linear forces tangential to the grasp surface. Tangential torques can arise because the normal force is distributed across the contact area rather than focused at a point. We investigated the effects of tangential torques and tangential forces ...

We obtain some properties of a hyperbolic Ricci soliton with certain types potential vector fields, and we point out conditions when it reduces to trivial soliton. also study those submanifolds whose fields are the tangential components concurrent field on ambient manifold, in particular, show that totally umbilical is an Einstein manifold. prove if hypersurface Riemannian manifold constant cur...

We explore the existence of quasisymmetric magnetic fields in asymmetric toroidal domains. These vector can be identified with a class magnetohydrodynamic equilibria presence pressure anisotropy. First, using Clebsch potentials, we derive system two coupled nonlinear first order partial differential equations expressing family bounded In regions where flux surfaces and constant field strength a...