In this paper we present a discrete model governing the deformation of convex regular polygon subjected not to cross given flat rigid surface, on which it initially lies in correspondence one point only. First, set up form variational inequalities posed over non-empty, closed and subset suitable Euclidean space. Secondly, show existence uniqueness solution. The provides simplified illustration ...

In elastic plastic solids, approaching the sub micron scale, critical experiments indicated significant differences in the mechanical response. Thus, mainly in small volume behavior a length scale issue is introduced with implications on the basic understanding of deformation and fracture processes. The current study is centered on the mechanical response of silicon particles in the range of 20...

background exposure to the excessive levels of occupational noise is one of the principal harmful agents affecting the workers’ health. this study aimed to investigate the relationship between the occupational noise exposure and the hearing loss caused by working in small-scale service industries in the city of damavand, close to the metropolitan capital city of tehran, iran. methods this descr...

Understanding the mechanical environment of articular cartilage and chondrocytes is of the utmost importance in evaluating tissue damage which is often related to failure of the fibre architecture and mechanical injury to the cells. This knowledge also has significant implications for understanding the mechanobiological response in healthy and diseased cartilage and can drive the development of...

Quantum mechanics successfully describes physical processes at the microscopic scale and sometimes exhibits unique counter-intuitive phenomena. One such example is quantum-mechanical tunneling that cannot be explained in terms of classical mechanics. In search of an applicability for quantum mechanics on a macroscopic scale [1], the effect of dissipation on quantum tunneling has been studied in...

Many stormy events in astrophysics occur due to the sudden magnetic energy release. This is possible if a magnetic configuration abruptly changes its topology, an event usually referred to as magnetic reconnection. It is known that pure Ohmic decay is inefficient, occurring during cosmological times (due to the huge characteristic scales L). It is recognized that the presence of current sheets ...

Iterative solvers with preconditioning are the most powerful choice for large-scale scientific computation, especially for parallel computing. In nonlinear problems such as contact simulations for geophysics, the condition numbers of the coefficient matrices are usually large due to special constraint conditions. The result is slow convergence of the iterative solver. In this study, a new pre-c...