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다양한 태그 데이터를 지원하는 확장된 태그 이벤트 및 이벤트 처리 시스템
최승혁(SeungHyuk Choi),김성진(Sung-Jin Kim),권오흠(Oh-Heum Kwon),송하주(Ha-Joo Song) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.12
RFID의 리더 표준인 EPCglobal Reader Protocol (RP) 1.1은 태그 식별자 정보만을 기준으로 동작하는 태그 이벤트 시스템을 포함하고 있다. 그러므로 사용자 메모리 데이터나 센싱 데이터와 같은 태그 데이터의 변화에 대해서는 이벤트를 지원하지 못한다. 이러한 문제를 해결하고자 본 논문에서는 확장된 태그 이벤트 및 이벤트 처리 시스템을 제안한다. 제안된 이벤트 처리 시스템은 기존 RP 태그 이벤트 처리 시스템에 새로운 태그 이벤트 형을 추가하여 태그 데이터의 변경을 이벤트 형식으로 전달하도록 하였다. 제안된 확장 태그 이벤트는 RP의 태그 필드 기능을 이용하므로 응용프로그램 수준에서는 큰 변화 없이 사용될 수 있다. EPCglobal Reader Protocol (RP) 1.1 which is a standard for RFID readers includes a tag event system that operates based on tag identifiers. Therefore it does not support events for the changes in tag data such as user memory data and the sensing data. In this paper, to solve this problem, we propose an extended tag event processing system. In the proposed system, we added a new tag event type to the RP tag event processing system to support events on tag data changes. Little modification is needed on application side, since the proposed tag event utilizes RP tag field functionality.
( Soyeon Choi ),( Kyungho Chung ),( Seunghyuk Kwon ),( Hyoungjin Choi ) 한국고무학회 2016 엘라스토머 및 콤포지트 Vol.51 No.2
Magneto-rheological elastomer (MRE) is a material which shows reversible and various modulus under magnetic field. Comparing to conventional rubber vibration isolator, MREs are able to absorb broader frequency range of vibration. These characteristic phenomena result from the orientation of magnetic particle (i.e., chain-like formation) in rubber matrix. In this study, silicone rubber was used as a matrix of MREs. Carbonyl iron particle (CIP) was used to give magnetic field reactive modulus of MRE. The surface of the CIP was modified with chemical reactants such as silane coupling agent and poly(glycidyl methacrylate), to improve interfacial adhesion between matrix and CIP. The mechanical properties of MREs were measured without the application of magnetic field. The results showed that the tensile strength was decreased while the hardness was increased with the addition of CIP. Also, surface modification of CIP resulted in the improvement of physical properties of MRE, but the degree of orientation of CIP became decreased. The analysis of MR effect was carried out using electromagnetic equipment with various magnetic flux. As the addition of CIP and magnetic flux increased, increment of MR effect was observed. Even though the surface modification of CIP gave positive effect on the mechanical properties of MRE, MR effect was decreased with the surface modification of CIP due to decrease of CIP orientation. Throughout this study, it was found that the loading amounts of CIP affected the mechanical properties of MRE, and surface property of CIP was an important factor on MR effect of MRE.