http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김경민(Gyungmin Kim),김우철(Woocheol Kim),임혁(Hyuk Lim) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
재밍은 간섭 신호를 전파하여 무선 채널을 사용하는 다른 통신들을 방해하는 공격으로 타겟 네트워크 내 노드들의 통신 성능을 저해하는 것을 목적으로 한다. 이때 성공적이고 효율적인 재밍 공격을 위해서는 재밍 전략을 타겟 네트워크에 맞추어 적응적으로 세울 필요가 있다. 하지만 일반적으로 타겟 네트워크의 토폴로지와 통신 프로토콜 같은 정보들은 제한적이기에 최적의 재밍 전략을 사전에 세워두는 것에는 한계가 있다. 강화학습은 행동에 따른 환경의 반응을 통해 학습하여 수행자의 성능을 높이는 기계학습 기법으로, 재머가 주어진 환경에 맞추어 학습을 수행하여 적응적인 공격을 수행하도록 하기에 매우 적합하다. 본 논문에서는 시뮬레이션을 통해 강화학습 기반 재밍 공격을 구현하고 다양한 환경에서의 공격 성능을 평가한다.
김찬희 ( Chanhee Kim ),김경민 ( Gyungmin Kim ),이주영 ( Jooyoung Lee ),권호근 ( Hokeun Kwon ),김백일 ( Baekil Kim ) 대한예방치과·구강보건학회 2015 大韓口腔保健學會誌 Vol.39 No.3
Objectives: The aim of this study was to compare the tooth brushing methods recommended by dental associations and toothbrush manufacturers in various countries including South Korea. Methods: Eighteen countries―6 Asian, 2 North American, 2 Oceanian, and 8 European―were selected from members of the OECD, EU, and APEC, using information obtained from the primary email address of each dental association and information obtained from the websites of the associations regarding the officially recommended tooth brushing methods. In addition, 12 major toothbrush manufacturers were selected based on their market share, including 4 Asian manufacturers, 2 North American, and 2 European. Information about recommended tooth brushing methods was obtained from their websites. Results: The countries recommending a particular tooth brushing method by name were South Korea, Hong Kong, and Taiwan. While South Korea recommended the “rolling” technique, Hong Kong and Taiwan recommended the “bass” technique. Except for these countries, the other countries presented their recommended methods by explaining the initial position or motion of the toothbrush. The most commonly recommended method was tilting the brush head at an angle of 45 degrees to the gingival margin; this was recommended by 8 countries (44%) and 6 toothbrush manufacturers (75%). Brushing with a vibrating motion was also recommended by 9 countries (50%) and 4 manufacturers (50%). Conclusions: The most recommended brushing method was initially positioning the toothbrush at an angle of 45 degrees to the gingival margin and using a vibrating motion, which is effective against periodontal diseases. However, South Korea recommended the rolling technique, which is effective for controlling dental plaque. Given the high frequency with which periodontal disease occurs in South Korea, vibrating the toothbrush on the gingival margin should be recommended in addition to the rolling technique.