For regulated exocytosis, we model the morphology and dynamics of the making of the fusion pore or porosome as a cup-shaped lipoprotein structure (a dimple or pit) on the cytosol side of the plasma membrane. We describe the forming of the dimple by a free boundary problem. We discuss the various forces acting and analyze the magnetic character of the wandering electromagnetic field wave produce...

Background: The presence of philtrum in the middle area of the upper lip is a pre-eminent feature of facial aesthetics. However, the philtrum is invariably damaged in cleft lips, and the damage persists even after primary surgery. We attempted to use de-epidermized scar tissue flaps, to raise the philtral ridge and dimple, in secondary unilateral cleft lips. Methods: A prospective study was pla...

As an alternative to blind coring of the soft tissue from the buccal mucosa to the dermis or the placement of transcutaneous sutures, both of which can be associated with untoward side effects, the authors describe a safe and effective method for creating dimples through an open technique that replicates the anatomical basis of a natural dimple.

In this paper, an observation on the toe pad of a newt was carried out. It was found that the pad surface is covered with an array of polygonal cells separated by channels, similar to those of a tree frog's pad. With this micro-structure, a newt can move on wet and smooth surfaces without slipping. Inspired by the surface structure of newt toe pads, elastic micro-patterned surfaces were fabrica...

Surface texturing is an important approach for controlling the tribological behavior of friction pairs used in mechanical and biological engineering. In this study, by utilizing the method of three-dimensional computational fluid dynamics (CFD) simulation, the lubrication model of a friction pair with micro-dimple array was established based on the Navier-Stokes equations. The typical pressure ...

in recent years, in order to reducing die design and manufacturing costs, multi point forming technique has gained an increasing interest because of its high flexibility. in this process, the conventional fixed shape solid die sets are replaced with a pair of opposite matrices of controllable elements. in this paper, the fundamental principles of multi-point forming was described and the possib...

A study is presented of the post-buckling behavior and imperfection-sensitivity of complete spherical shells subject to uniform external pressure. The study builds on and extends the major contribution to spherical shell buckling by W.T. Koiter in the 1960’s. Numerical results are presented for the axisymmetric large deflection behavior of perfect spheres followed by an extensive analysis of th...

The article is considered a comparative analysis for predicting defect such as dimple by energy method of power balance, upper bound and finite element method. takes into account the geometrical position dimension dimple, criterion formation in balance presence minimum point function relative pressure on velocity metal outflow vertical direction. New engineering calculations are developed combi...