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황유동(Yu-dong Hwang),이유리(You-ri Lee),박동규(Dong-gue Park),임황빈(Hwang-bin Yim),오진태(Jin-tae Oh),장종수(Jong-soo Jang) 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.12D
네트워크 침해 유형이 특정 호스트나 서버를 목표로 하여 개별 시스템이나 해당 시스템이 제공하는 서비스에 대한 공격에서 광역 네트워크 서비스 제공에 대한 공격으로 변화 하고 있다. 또한 네트워크 인프라의 속도가 증가되고 서버들의 성능이 개선됨에 따라서 공격 피해의 전파 속도 또한 빨라지고 있다. 야에 따라서 웜은 그 특성상 빠른 공격이 예상된다. 따라서 본 논문에서는 웜을 통한 공격으로부터 네트워크 인프라를 보호하기 위해서 SSDT(System Service Dispatch Table)를 이용한 웜 탐지 시스템을 설계 및 구현한다. The specific host or the server is appointed as a goal and the server has the network breach type in an attack to the individual system or the service which the corresponding system provides to the attack about the wide area network service providing with a change. Moreover, as the speed of the network infrastructure is increased and the performance of the servers is improved, the speed moreover gets raged with the propagation velocity of the attack damage. Accordingly, as to the worm, the fast attack of the on characteristic real-time is predicted. Therefore, in this paper looked, it tries to design and implementation of the worm detection system for protecting the network infrastructure from the attack through the worm.
이유리(You-ri Lee),박동규(Dong-Gue Park),황유동(Yu-dong Hwang),유승엽(Seung-Yeop Yoo) 한국통신학회 2009 韓國通信學會論文誌 Vol.34 No.6D
유비쿼터스 환경에서의 원격 의료 서비스가 제대로 갖춰지게 된다면 언제 어디서라도 응급 처치를 위한 치료가 가능하다. 이것은 사용자가 언제 어디서나 의료 데이터에 접근 할 수 있다는 것을 의미하며 이는 의료 데이터 보안을 위협하는 단점이 될 수 있다. 의료 데이터 보안에 대한 위협은 환자의 생명과 관련된 중요한 정보에 큰 위협을 가져 올 수 있다. 따라서 본 논문에서는 이러한 문제 해결을 위하여 유비쿼터스 환경에서의 원격 의료 서비스에 적합한 접근제어 모델을 제안하였고 이 모델을 이용하여 유비쿼터스 환경에서 원격 의료 서비스를 이용하는 사용자의 프라이버시 보호 및 유동성 있고 세밀한 접근제어가 가능하다. If tele-medical service in ubiquitous environment is equiped properly, treatment for a first-aid treatment is available whenever and wherever. That means that user can approach to medical treatment data always and can get into shortcoming that threaten medical treatment data security. Threat about medical treatment data security can bring big threat to important information connected with life of patient. Therefore, in this paper, proposed suitable access control model in tele-medical service in ubiquitous environment for these problem solution. There is privacy protection and fluidity of user who use tele-medical service in ubiquitous environment using this model and minute access control is available.
Ir-192 방사선원의 밀봉 용접부 품질에 미치는 저항용접 공정변수의 영향
한인수,손광재,이영호,이유황,이준식,장경덕,박울재,박춘득,Han, In-Su,Son, Kwang-Jae,Lee, Young-Ho,Lee, You-Hwang,Lee, Jun-Sig,Jang, Kyung-Duk,Park, Ul-Jae,Park, Chun-Deuk 대한용접접합학회 2009 대한용접·접합학회지 Vol.27 No.1
Ir-192 radiation sealed sources are widely employed to the therapeutic applications as well as the non-destructive testing. Production of Ir-192 sources requires a delicate but robust welding technique because it is employed in a high radioactive working environment. A GTA(Gas Tungsten Arc) welding technique is currently well established for this purpose. However, this welding method requires a frequent replacement of the electrode, which results in the delay of the production to take a preparatory action such as to isolate the radiation sources from the working place before getting access to the welding machine. Hence, a resistance welding technique is considered as an alternative method of the GTA welding technique. The advantages of resistance welding are high welding speed and high-rate production. Also it has very long life of electrode comparing to GTA welding. In this study, the resistance welding system and proper welding conditions were established for sealing Ir-192 source capsule. As a results of various experiments, it showed that electrode displacement can be employed as a indicator to predict welding quality. We proposed two mathematical models(linear and curvilinear) to estimate electrode displacement with process parameters such as applied force, welding current and welding time by using regression analysis method. Predicting results of both linear and curvilinear model were relatively good agreement with experiment.
ESPI를 이용한 반도체 패키지 내부결함 검사에 관한 연구
정승택(Seung-Tack Jung),김경석(Koung-Suk Kim),양승필(Seung-Pil Yang),정현철(Hyun-Chul Jung),이유황(You-Hwang Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Computer is a very powerful machine which is widely using for data processing, DB construction,<br/> peripheral device control, image processing etc. Consequently, many researches and developments ha<br/> ve progressed for high performance processing unit, and other devices. Especially, the core units suc<br/> h as semiconductor parts are rapidly growing so that high-integration, high-performance, microminiat<br/> turization is possible. The packaging in the semiconductor industry is very important technique to de<br/> determine the performance of the system that the semiconductor is used. In this paper, the inspectio<br/> n of the inner defects such as delamination, void, crack, etc. in the semiconductor packages is studi<br/> ed. ESPI which is a non-contact, non-destructive, and full-field inspection method is used for the in<br/> ner defect inspection and its results are compared with that of C-Scan method.