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스마트홈 네트워크에서 댁내 인증서 기반의 IoT 디바이스 상호인증 방안
안희성 ( Hee-sung Ahn ),지은화 ( Eun-wha Jhee ),서창호 ( Chang-ho Seo ),신용태 ( Yong-tae Shin ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2
IoT 디바이스의 범위와 서비스 시장의 확산과 함께,스마트흠 환경에서 사용되는 디바이스의 종류도 점점 중가하고 있다. 이에 따라 IoT 디바이스의 제어 및 관리의 관점에서 사용자 도용,불법적인 접근 같이 다양한 보안 위협도 고려해야 한다. 이러한 위협으로 인해 스마트홈 내 디바이스 간의 신뢰적인 인증이 필수적으로 갖춰야할 요구사항이 되었다. 즉,스마트홈 내에서 유효한 권한을 가진 디바이스의 접근만을 허용하여 안전한 서비스를 제공해야 한다. 본 논문에서는 스마트흠 네트워크 환경에서 IoT 디바이스 간 신뢰적으로 통신할 수 있도록,댁내 인증서 기반의 디바이스 등록 및 인증서 발급 절차와 디바이스 인증 및 서비스 제공 절차를 통한 IoT 디바이스 상호 인증 방안을 제안한다.
스티븐 홀에 Scoring과 빛을 이용한 건축 디자인 분석
안희성(Ahn, Hee-Sung),전유창(Jeon, You-Chang),김성욱(Kim, Sung-Wook) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.2
Light acts as an essential element in the process of human perception of space and things. For this reason, light has been used in architecture as an important factor in creating an emotional atmosphere in space. Light is based on the medium and can create a variety of moods and affect the atmosphere in the space. In other words, light that enables humans to recognize space, materials that influence light to create an atmosphere in space, and the way light is introduced into the space and the amount of inflow are the factors that create an atmosphere in space. Steven Holl used the concept of "Scoring" in the "Museum of the City, Cassino" project, which means recognizing the elements that make up space as "note" and forming a single "Score" through a combination between "note"s. Through the "Scoring" method in Steven Hole, we are going to summarize the interrelationships between the characteristics of light required in the space and expand them as indicators to consider the applicability of various spaces.
리베스킨트의 초기 작업(Micromegas)에 대한 3차원적 분석 – 위상학과 유형학 분석을 중심으로 -
안희성(Ahn, Hee-Sung),전유창(Jeon, You-Chang),김성욱(Kim, Sung-Wook) 대한건축학회 2020 대한건축학회 학술발표대회 논문집 Vol.40 No.2
This study aims to take practical and concrete ways to recognize Reevekind’s experimental work as a difficult work only or to supplement the studies he had previously viewed with an abstract and comprehensive perspective. Rather than doing limited interpretation of drawing as an experimental work, it provides a different perspective on understanding Reevekind architecture through the process of spatializing and shaping experimental drawing. I hope this will serve as an opportunity to describe that experimental work is not just an abstract concept, but an important process in establishing an architectural view, and to reconsider the importance of experimental work
알고리즘 기술을 활용한 금속 루버의 입면 구축 방법 연구 – 물성 모포로지의 활용을 중심으로 -
안희성(Ahn, Hee-Sung),김성욱(Kim, Sung-Wook),전유창(Jeong, You-Chang) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.1
Moving from modern architecture, the advent of digital technology made it possible to construct complex or unique architectural forms that were difficult to implement in reality. Form implementation became possible. The design method using such digital technology naturally led to interest in morphology, and led to a method of deriving morphology-based alternatives using material properties. The specificity of each alternative derivation method appears, which means that it is impossible to draw a conclusion that results in any method, and the specificity makes it driven by an integrated process, and the characteristics of each methodology have a complementary relationship. Designers should selectively use alternative methods that are suitable for each stage of the design process they have built.
안희성(Ahn, Hee-Seong),임병빈(Im, Byung-Bin),윤상돈(Yoon, Sang-Don) 한국영어교과교육학회 2010 영어교과교육 Vol.9 No.3
This study investigated the effect of extensive reading on improving middle school students’ writing ability. For this study, 114 students in the third grade were selected as subjects. The subjects were divided into two groups during 6 months. The students in the experimental group participated in writing activities following extensive reading while the students in the control group engaged in writing activities after reading textbook materials. To investigate the effects of extensive reading, writing tests were administered before and after the experiment, and both quantitative and qualitative changes were analyzed. The results of the questionnaire survey and analysis of writing tasks suggested that the effect of extensive reading on middle school students’ writing ability proved to be significantly positive. Although the analytical evaluation for writing shows significant increase in two areas (accuracy and fluency), in the other two areas (contents and organization), there was no significant improvement of the students’ writing ability.
습식탄산화반응을 통한 폐콘크리트 미분말의 CO₂ 고정량 및 CaCO₃ 생성량 추정에 관한 연구
안희성(Ahn Hee-Sung),김진섭(Kim Jin-Seob),이한승(Lee Han-Seung) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.7
The purpose of this study is to provide wasted concrete which could be help for the recycling of the waste concrete and the reduction of carbon dioxide, those are an issue that gives rise to enormous controversy. The way of the experiment in chemistry is to inject carbon dioxide into aqueous solution made by calcium hydroxide using the Pressure Reactor. Before conducting the experiment, the existing studies based on the material, the mechanism of hydroxylation, carbonation and the solidification were considered. As a result, it was measured how much carbon dioxide is absorbed by the aqueous solution and it was confirmed how much calcium carbonate is producted. Therefore, the amount of carbon dioxide absorbtion in the 1㎥ waste concrete was quantitatively predicted. In addition, the crystal structure and the degree of purity of calcium carbonate was analysed by FE-SEM. It could be an fundamental data to decrease both carbon dioxide and waste concrete, especially waste cement mortar powder. It also would a higher value-added business because of the product, calcium carbonate.
물성 모포로지 기반의 건축 디자인 프로세스에 관한 연구
안희성(Ahn, Hee-Sung),전유창(Jeon, You-Chang),김성욱(Kim, Sung-Wook) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.2
Digital technology has been used as a design creation tool that embodies the imagination of architects. Through this, materials were transformed in various ways, inducing creative thinking by architects. If existing design methods have expanded the possibility of shape generation, morphology design methods through digital technology and material transformation can be used as more practical design methods. Morphology of materiality is a concept that generates various alternatives through the principle and system of shape generation. The potential of materiality can be expanded and utilized in shape and surface design. This study analyzes representative design processes using morphology of materiality. Through this, the purpose is to systematize a design process that expands the various possibilities of materiality.
UHF 및 가스센서를 이용한 SF<sub>6</sub> 가스 상태 감시기술 기초연구
안희성,조성철,엄주홍,Ahn, Hee-Sung,Cho, Sung-Chul,Eom, Ju-Hong 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.2
[ $SF_6$ ] gas for compacted power facilities has a important role as an insulation gas. It is very blown well that $SF_6$ gas has the superior characteristics as an insulation gas. For reliable operation of SF6-gas-based high and medium voltage equipment it is very important to keep the insulation ability within a safe range. And the experimental and measuring system were implemented. The test chamber designed to endure up to 3 atmospheric pressure. The analysis results of the experimental data shows that positive partial discharge can be detected by discharge current and UHF signal. Additionally it is shown the possibility that $CO_2$ gas sensor of semiconductor type can be detect the variation of $SF_6$ gas condition. The UHF sensor shows good feature to detect the variation of $SF_6$ gas condition for partial discharge and breakdown discharge. 정보화 시대로 변화함에 따라 고품질 전력의 중요성이 강조되고 있으며 이를 보장하기 위한 전력기기 운전의 신뢰성 향상이 선결과제로 대두되었다. 특히 대용량 전력기기 중 개폐기와 차단기의 성능을 일정 수준 이상으로 유지하기 위한 예방진단기술이 발달되어 왔다. 개폐기와 차단기에서 많이 사용되는 $SF_6$ 가스의 절연성능을 검출하여 유지보수 여부를 결정하는 것이 매우 중요하다. 본 연구에서는 이러한 $SF_6$ 가스의 절연성능을 검출하기 위해 사용되는 여러 가지 방법 중에 전기방전에 의해 나타나는 여러 현상을 검출하는 센서들의 기초특성을 확인하고 파악된 특성을 통해 복수의 검출센서를 사용할 것을 제안하였다. 즉 코로나 방전이나 아크방전 시에도 사용할 수 있는 UHF 센서와 방전전류 검출기를 병용하는 것이 $SF_6$ 가스의 절연성능 확인에 유리할 것으로 판단되었다. 이외에도 가스센서를 이용한 $SF_6$ 가스의 절연상태 검출을 시도해 그 가능성을 시험해 보았다.