Seongwon Hong

Physical transdermal delivery systems such as electroporation, sonophoresis, and iontophoresis have been studied for their potential to enhance cutaneous absorption of active ingredients, improving penetration and bioavailability in cosmetic and therapeutic applications [1]. Electroporation delivers short high-voltage pulses that transiently disrupt the stratum corneum, forming micropores that allow passage of otherwise impermeable molecules [2, 3].

1. Introduction Slingshots have been used as weapons for hunting and warfare since ancient times, and many people still use them for hunting and recreational activities in modern times. Conventional slingshots have been commonly used as toys due to their ease of manufacture and the low kinetic energy of their projectiles, which are launched using the elasticity of rubber.

In previous studies, it was demonstrated that the geometry of regular anticlastic membrane structures attached to edge beams on all four sides of the membrane is one of the most influential factors for the performance of the structure. However, regular anticlastic membranes are not easy to apply at specific design sites. For this reason, a greater degree of irregularity is introduced in this study to create a wider range of design possibilities.