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김춘동,김철규,박세현,Kim, Choon-Dong,Kim, Chol-Gyu,Park, Sh-Hyun 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.10
본 논문에서는 휴대용 유중가스 분석기에 대해 연구 및 개발 하였다. 제안된 휴대용 유중가스 분석기는 전력기기로부터 절연유 내의 소량의 가스를 추출하여 비정상적인 열적 정보를 얻어 분석하는데 유용하게 쓰인다. 분석된 정보로부터 전력기기의 안정성을 평가할 수 있다. 본 논문에서는 기존의 고가의 시설기반의 고정형 유중 가스 분석기를 사용함으로써 발생되는 직간접적인 문제점을 해결하기 위해서 광음향 분광법 기반의 소형화된 휴대용 유중가스 분석기를 제안하고 실험적으로 검토하였다. 제안된 휴대용 유중 가스 분석기는 사용하기 편하고 실시간으로 전력기기의 열적 정보를 분석할 수 있다. 제안된 휴대용 유중가스 분석기가 현재의 전력기기 유중가스 분석에 사용된다면, 전력기기의 유중가스 분석주기를 줄임으로써 안정성을 향상 시키고 열적 이상 정보에 대하여 긴밀하게 대응할 수 있다. The paper presents a procedure for how to development and theoretical review on Dissolved Gas Analyzer. the information of abnormal thermal stress on electrical power equipment by testing the gas is validated to easy by the gas analyzer presented in the paper. the analyzed information is used to evaluate the stability of electrical power equipment. the existing and selling DGA(dissolved gas analyzer) is so expensive and vast that all DGA product comes from foreign country. The objective of the paper is to prove that PAS(photoacoustic spectroscopy) based on a compact portable DGA solve the fixed type of DGA in order to eliminate the occurring issue directly or indirectly. the proposed DGA is easy to handle, and this can also analysis in real time for testing electrical power equipment. By applying the proposed portable, DGA be utilized in the currently electrical power equipment that are being implemented to reduce cycle of analysis of dissolved gas, it can contribute to improving safety by providing the agility of the evaluation of degradation.
김춘동(Choon Dong Kim) 서울대학교 비교문화연구소 2012 비교문화연구 Vol.18 No.1
As powerful symbolic resources, foods become instruments to confirm social identity and to communicate cultural meanings. And in these processes, images of certain food are formed for political or economic purposes or needs as a result of combining with sociocultural or symbolic meanings. In this paper, by case study of coffee, I proved that the function, taste and the way of consuming food can be made into images and these images can be distributed. It has been known that the attributes of coffee are the effect of awaking, strong and rich taste and aroma and exotic atmosphere. And these attributes have been made into various images and utilized for social, political and economic needs. The groups, that utilized the coffee as a instrument of forming political or social identities, endow meanings and names to the caffeine, taste, aroma and exoticism of coffee and by it mystify the consumer and enhance consuming. The ability to endow meanings and names to things, behaviors and ideas has been the sources of their power. By these abilities they can govern choice of the consumers. So the coffee is very political commodity.
경부 전이성 이하선암과 유사한 양상의 이하선내외에 동시 발생한 편측성 왈틴씨 종양 1예
김춘동(Choon Dong Kim),김승우(Seung Woo Kim),곽슬기(eul Gi Kwak),사대진(Dae Jin Sah) 대한두경부종양학회 2013 대한두경부 종양학회지 Vol.29 No.1
Warthin’s Tumor is the second most common tomor of the parotid gland after pleomorphic adenoma. It is well known to occur as bilateral and multiple patterns. The incidence of extraparotid Warthin's tumor(EPWT)is about 2.7% to 12%,peri-parotid and upper cervical area are the most common sites. Warthin's tumor with synchronous intraparotid and extraparotid area is extremely rare, only a few cases have been reported. We report a-71-year old man with unilateral swelling of the parotid area and upper neck,pathologically confirmed Warthin's tumor with literature review.