The method of matched asymptotic expansions is used to study a contact problem for a system consisting of a large number of small punches situated along a given curve on the boundary of an elastic half-space. The cases of cylindrical punches (the linear problem) and spherical punches (the structurally non-linear contact problem) are considered. In the linear case the reduced logarithmic capacit...

The developers of high aspect ratio components aim to minimize the processing stages in deep drawing processes. This study elucidates the application of microridge punches in multistage deep drawing processes. A microridge punch improves drawing performance, thereby reducing the number of stages required in deep forming processes. As an example, the original eight-stage deep forming process for...

Hair transplantation involving patients with tightly curled Afro-textured hair using follicular unit extraction (FUE) employing conventional rotary punches frequently leads to unacceptably high transection rates. These patients are unsuitable candidates for FUE hair transplantation. Transection rates were observed during FUE in a case series of 18 patients with tightly curled Afro-textured hair...

Modification of the punch geometry can greatly reduce force necessary to perform perforation belt. This paper presents research on axially non-symmetrical piercing punches – double sheared one and with a cylindrical bowl. FEM analysis was performed for variable tip angle β in 60-150° range or bowl radius R 5.25-10 mm constant diameter D = 10 TFL10S Based obtained results, influence (for punch) ...

The type 1 Boston Keratoprosthesis preparation requires a 3-mm central punch and an 8.5 mm or larger punch in the carrier tissue. These punches are ideally concentric, but we have found difficulty in achieving concentric punches when the larger punch is performed first. We present a modification in the preparation procedure to help minimize centration error.

Humans commonly ascertain physical dominance through non-lethal fighting by participating in combat sports. However, the behaviours that achieve fight dominance are not fully understood. Amateur boxing competition, which is judged using the subjective "Ten Point Must-System", provides insight into fight dominance behaviours. Notational analysis was performed on 26 elite male competitors in a na...