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장보라,심현주,김용익,정진안,오영석,김상섭,최병정,이은택,Jang, Bo-Ra,Shim, Hyun-Ju,Kim, Yong-Ick,Chung, Jin-An,Oh, Young-Suk,Kim, Sang-Seup,Choi, Byong-Jeong,Lee, Eun-Taik 한국강구조학회 2010 韓國鋼構造學會 論文集 Vol.22 No.4
본 연구의 목적은 모멘트 접합 골조에서 각형강관 기둥-H 형강 보 접합부의 내진성능평가이다. 각형강관은 H형강에 비해서 효율적이고 많은 장점이 있음에도 불구하고, 아직 접합 디테일의 부족과 경험 부족 등의 이유로 현장에서 적용이 제한적이다. 각형강관을 사용한 기존의 모멘트 접합부는 주로 관통형 다이아프램 형식을 사용하고 있는데 이는 시공과정이 복잡하여 현장에서의 적용을 어렵게 한다. 그러므로 이 연구에서는 각형강관 기둥을 절단하지 않는 접합상세에 대하여 구조성능 및 내진성능을 평가하고자 하였다. 엔드플레이트와 헌치를 이용한 용접접합의 접합상세에 대하여 내력 및 강성, 에너지흡수능력을 비교분석하였다. The objective of this paper is to examine the structural performance of steel moment-resisting frames on the various connection details of Seismic Wide-flanged Beam-to-Rectangular Steel Tube Column connections. Although compared to an H-shaped steel tube, a rectangular steel tube has many advantages and is more efficient, its application is limited due to the lack of experience in using it and the connection details. Existing steel moment connections using the rectangular steel tube are mainly used through plate diaphragms. The processing of construction of the rectangular steel tube is so complicated that it is hard to apply it in the field. In this study, the structural performance and the earthquake capacity of the connection details that do not cut the rectangular steel tube column were investigated. A comparative analysis of the strength, rigidity, and energy absorption capacity of the welded connection details using an end-plate and a haunch was also performed.
서울 일부지역 재래시장의 유전자재조합 콩나물의 판매실태 및 상인과 일부 고등학생의 유전자재조합 식품에 대한 인식도 조사
최슬기(Seul Ki Choi),임정훈(Jung Hoon Lim),신지성(Jee Seong Shin),정진안(Jin An Jeong),정효지(Hyojee Joung) 대한지역사회영양학회 2010 대한지역사회영양학회지 Vol.15 No.5
The purpose of this study is to monitor genetically modified bean sprouts at traditional markets in Seoul and to investigate perception of traditional market merchants and high school students on genetically modified organisms (GMOs). We analyzed 30 bean sprouts that were selected at 11 traditional markets in Seoul using the method of polymerase chain reaction (PCR). Also, we compared perception of GMOs between merchants (n = 30) and students (n = 126). Knowledge test about GMOs was performed by students. The result of PCR, 16.7% of bean sprouts were confirmed as GM bean sprouts (n = 5). Students had significantly more exposure to information about GMOs than merchants (p < 0.05). Major information sources about GMOs were from mass media (television, newspaper and radio). About half of subjects were not aware that they eat GMOs and GMOs are sold to consumers. Only 17.3% of subjects had constant eating intent for GMOs after perceiving foods that he/she usually eats are GMOs. 51.3% of subjects had willingness to purchase GMOs if GMOs have same quality and lower cost than natural foods. 37.2% of subjects thought that GMOs would be harmful to humans. Students had more positive perception of GMOs` side effects than merchants (p < 0.01). There was no merchant who knew labeling of GMOs. 19.1% of students knew labeling of GMOs. Students` mean percentage of correct answers of six questions about GMOs was 45.2%. Therefore, providing adequate information about GMOs is needed for consumer`s choice whether to purchase GMOs or not. (Korean J Community Nutr 15(5): 679~686, 2010)