http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
객체지향개념을 도입한 Mobile IP의 설계 및 구현 (1)
채동현(Donghyun Chae),손동우(DongWoo Sohn),마영식(Youngsik Ma),안순신(Sunshin An) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅲ
최근 무선 통신 기술의 발달과 휴대용 컴퓨터의 소형화, 수요증가에 따라 휴대용 컴퓨터에서의 통신은 차차 우리 생활에 없어서는 안될 요소가 되어가고 있으며 IP 기반에서의 Mobility 제공을 그 목적으로 하는 Mobile IP 기술은 차세대 인터넷 망의 핵심기술이 될 전망이다. 이에 본 논문에서 Mobile IP Protocol을 Mobile Node를 중심으로 객체지향 개념을 도입하여 설계, 구현한다.
채동현,변원섭,손연아 한국초등과학교육학회 2003 초등과학교육 Vol.22 No.1
The purpose of this study is to observe, to analyze of the preservice teachers' theories about the change of season. And it is to find a instruction strategy which can solve problem about this. The general idea about the change of season is observed by 3 methods which are simply explaining with words, explaining with pictures and models. The author is to find the similarity, difference and relationship which the preservice teachers have about the general idea about the change of season. The important changable primary factors, which can effect to the general idea formation, are naturally dragged out through the observation of preservice teachers participation. For this study, 4 first year preservice teachers of one of national university of education are used. Before the interview, the author tries to form rapport with the preservice teachers. Experiment materials, pencil, paper, camcorder, digital recorder and interview note were used for the study with reflection of them just way they are. As the result of the interview, all of 4 preserivce teachers had not being understand the concept about the change of season and the three ways of explanation methods were not matched each other, so it is revealed that the general idea of the change of season, which the preservice teachers have, is not strongly formed. In spite of the repeated study of the change of season from elementary school to university, it has many problem about recognition of the general idea about the change of season which pre-elementary teachers have. Therefore it is needed to improve the experiment in elementary science text book and naive theories by the activity which is explaining the change of season in three dimension space, to prevent the naive theories which the preservice teachers may have.
이동현(DongHyun Lee),배동환(DongHwan Bae),유승록(SeungLok Yoo),채진영(JinYoung Chae),이윤호(Yunho Lee),양형규(HyungGyu Yang) 한국정보보호학회 2011 情報保護學會誌 Vol.21 No.7
보안 키패드는 사용자가 스마트폰을 이용하여 금융 거래를 할 때 사용자가 입력한 패스워드의 터치 좌표가 노출되더라도 키 값을 유추할 수 없도록 한 보안 애플리케이션이다. 하지만, 현재 상용화된 보안 키패드는 좌표값 노출에 따른 키값 노출을 막기 어려우며, 특히 휴리스틱 분석이나 사전 공격(dictionary attack)등에 취약한 문제가 있다. 본 논문에서는 현재 사용되는 보안 키패드의 취약점을 분석하고, 이러한 취약점을 해결하기 위한 몇 가지 개선 방안을 제안한다.