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이신주,정성환,배재민 한국산업정보응용수학회 2001 한국산업정보응용수학회 Vol.5 No.2
Steganography, a form of data hiding, embeds secret data into digital media for the purpose of identification, annotation, and copyright. We propose a high capacity image steganography based on E. Kawaguch's method. It embeds secret data to some LSBs and selectively embed MSBs with the complexity measure. In the experiment, it presents that our scheme improves the maximum capacity by 11,008 byte, compared with E. Kawaguch's. It also shows that about 4dB improvement in PSNR when the same amount of data is inserted.
석면함유자재 해체ㆍ제거 전과정에서 발생하는 이산화탄소 발생량 산정을 위한 추정 모델 개발
배재민(Bae, Jae-Min),김영찬(Kim, Young-Chan),홍원화(Hong, Won-Hwa) 대한건축학회 2013 대한건축학회논문집 Vol.29 No.10
Globally, due to climate change by GHG(Green House Gas) emissions like Carbon dioxide(CO₂), new regulations and strategies are constantly being introduced. Due to increased understanding and interest about GHG emissions like Carbon dioxide, construction fields in many countries have conducted study to reduce Carbon dioxide of construction materials manufacturing, construction, maintenance and dismantling steps. Problems related to waste treatment are increasing along with amount of construction waste. Therefore, A study on carbon dioxide emissions from the demolition phase is required. Especially, asbestos containing materials cause serious problems. However, unlike ordinary construction materials, there is no case study on the calculation of Carbon dioxide emission from dismantling and demolition of Asbestos Containing Materials. Thus, in this paper, CO₂ emissions calculated from dismantling and demolition of Asbestos Containing Materials depending on types and based on formulation presented in “Ministry of Environment” guidelines and carbon emission factor of “Korea Power Exchange”.
배재민 ( Bae Jae-min ),임경호 ( Lim Kyung-ho ) 한국디자인트렌드학회 2015 한국디자인포럼 Vol.46 No.-
미디어가 다양해지면서 현대사회는 영상매체의 지배적인 영향력 아래에 있다. 넘쳐나는 영상들이 수용자에게 전달하는 정보들은 필요 이상으로 많아졌으며 이에 따라 제작자는 더욱 효과적인 시각 표현방법을 모색하게 되었다. 그중 착시는 중요한 시각적 요소로서 사진이나 그래픽에 사용될 뿐만 아니라, 시각적 긴장을 유발하기 위하여 영상에서 적극적으로 활용되고 있다. 이에 본 연구는 영화의 함축적인 내용을 전달하는 오프닝 타이틀에서 착시가 어떻게 활용되고 있으며 의미작용을 하는지에 대한 분석을 시행하였다. 1900년대부터 현재까지 착시가 사용된 대표적인 오프닝 타이틀을 선정한 후 그것을 분석하여 영상정보의 전달과 이를 위한 착시효과의 활용 관계에 대하여 고찰하였다. 본 연구에서는 이러한 분석을 통하여 오프닝 타이틀에 사용된 착시가 커뮤니케이션 작용의 측면에서 충분히 수용자에게 전달하고자 하는 의미를 내포하고 있다고 결론 내릴 수 있었다. 그리고 착시의 특성이 다양하게 활용됨이 나타났으며 그것이 영화의 내용을 함축적으로 표현하는 오프닝 타이틀의 특징과 관련하여 매우 중요한 요소로 쓰이고 있음을 알 수 있었다. 이는 착시를 사용한 영상의 화면구성이 단순히 미를 중요시하기보다 제작자가 의도한 메시지를 수용자에게 전달하는 구실을 하고 있기 때문이다. 후속연구에서는 오프닝 타이틀뿐만 아니라 다양한 영상매체에 사용된 착시에 대한 분석을 시도하여 시대적 욕구에 만족하는 연구가 필요하다고 본다. With diversification of media, the modern society is under dominant influence of visual media. There is needlessly large volume of information presented by overflowing videos to users, and producers are looking for more effective methods of visual expression. Among such methods, illusion is an important visual element used in photographs and graphics, and it is actively used in videos to create visual tension. Accordingly, the aim of this study is to analyze how illusion is used in implicative opening titles of films and its meaning. Representative opening titles that used illusion since 1900s until present are selected and analyzed to discuss the relationship between delivery of visual information and use of illusion effect. A conclusion was drawn in this study that illusions used in opening titles of films sufficiently include the meaning intended to be delivered to users in terms of communication. With diverse use of illusion characteristics, they were found to be used as an extremely important element of opening titles, which implicatively express contents of films. This is because screen compositions using illusion play the role of delivering messages intended by producers to users instead of simply placing importance on beauty. A follow-up study is required to analyze illusions used in different visual media other than opening titles, satisfying the timely demand.
디지털 컨텐츠 보호를 위한 웨이블릿 계수의 비트 플래인 기반 Fragile 워터마킹
배재민(Jae-Min Bae),이신주(Sin-Joo Lee),정성환(Sung-Hwan Jung) 한국정보과학회 2001 한국정보과학회 학술발표논문집 Vol.28 No.2Ⅰ
Wong 은 디지털 영상의 인증과 무결성을 위해 해쉬 함수와 암호화 알고리즘을 공간 영역상에서 적용하였다. 본 논문에서는 웨이블릿 변환 영역 상에서 Wong 의 방법을 토대로 하여 fragile 워터마킹 방법을 제안한다. 즉, 삽입할 워터마크를 LSB 만 아니라 웨이블릿 계수의 비트 플래인을 고정시키지 않고 삽입함으로써, 워터마크의 삽입이 LSB에 고정되는 Wong 방법의 단점을 보완하였다. 실험결과 약간의 변형에도 영상의 변형 유무와 변형된 위치를 확인할 수 있었다.
설문조사를 통한 석면슬레이트 건축물 거주환경 개선에 관한 연구
배재민(Bae, Jae-Min),김영찬(Kim, Young-Chan),원안나(Won, An-Na),홍원화(Hong, Won-Hwa) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.12
About 96% of asbestos imported to domestic country in 1970’s was used for asbestos cement slate that is the construction material. But in case asbestos is inhaled into the lung as it flies due to aging of surface of asbestos cement slate, it causes various malignant diseases. Therefore, the effective management and improvement are required to be reviewed regarding removal and improvement of asbestos cement slate in urban areas. So this study selected the object areas targeting Seoul City that has the characteristics of urban area. Visiting research was carried out targeting the residents in asbestos cement slate building who reside in Seoul City in person. As its results, the effective information transfer turned out to be required as the ratio that answered as ‘I don’t know about that.’ regarding the fact that asbestos is contained in asbestos cement slate appeared to be 68.96%. And the ratio that answered as ‘No plan to improve’ the roof materials of asbestos cement slate appeared to be 50.49%. But it could be recognized that they expected removal of asbestos cement slate and support of improving costs from the central and local governments as the ratio that answered as ‘Have a plan to improve’ if the central and local governments support appeared to be 65.99%. And it is considered that the effective cost support is required to be reviewed again now that domestic government supports the costs of removing and improving asbestos cement slate, but actual construction costs of removal and improvement appeared to be higher than supporting costs from the government by 2 to 2.5 times.