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Hyperbola Structures for Robust Superomnipobic Surface
김재경,류예린,허성길,윤현식 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Superomniphobicity can be generated by fabricating reentrant structures on surfaces. These structures can consist of different shapes (e.g. mushroom shape or inverse trapezoids) whose characteristic, the Cassie-Baxter state, is causing superomniphobicity. Due to the narrow region on structures bottom, reentrant structures can be fragile towards mechanical load or shear. Therefore, it is still challenging to provide durability for superomnipohobic reentrant structures under the exposure of external mechanical stress. Here, a facile method for obtaining a durable micro-sized hyperbola structure is proposed, by applying a photocurable viscous liquid around micro-pillars, utilizing capillary wrapping. The micro-hyperbola structure shows high robustness that maintains omniphobic, even after carrying out physical stress tests (rubbing and friction tests). The here presented structure has huge potential for practical application in various fields which require superomniphobic surfaces.
류원재,신수용,허성길,최윤석,Ryu, Won-Jae,Shin, Soo-Young,Heo, Seong-Gil,Choi, Yoon-Seok 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.5
IPCS(Inter Process Communication Service) is a real-time communication middleware designed for warship combat battle systems based on publisher-subscriber communication model. Because IPCS was originally designed to operated under 100 Mbps network environment, increasing network speed into Gigabit environment does not linearly increase the throughput of IPCS. To solve this problem, we anaylized IPCS structure and optimized IPCS into Gigabit-Ethernet environment. We found parameters to improve IPCS based on UDP and Token-ring structure. By improving, IPCS has reliability and higher throughput than TCP although IPCS is based on UDP.