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김현중,김우환,이상철,임종호,조상희,김아현,Kim, Hyun-Joong,Kim, Woo-Hwan,Lee, Sang-Cheol,Im, Jong-Ho,Cho, Sang-Hee,Kim, Ah-Hyoun 한국통계학회 2008 Communications for statistical applications and me Vol.15 No.5
본 논문은 금융기관에서 활용하고 있는 운영리스크 측정모형에 대한 적합성검증 방법 중 안정성 검증에 관한 것이다. 신용리스크와는 달리 운영리스크는 손실자료의 특징, 과거 자료의 부족 그리고 적합성검증을 위한 이론적 도구의 부족 등으로 인해 현재 적절한 적합성검증 방안에 제시되지 못하고 있다. 본 논문에서는 운영리스크 VaR(Value at Risk) 추정값의 안정성을 평가하는 적합성검증 방법을 제시하고 이를 활용한 실증분석을 통해 제안된 방법에 대한 실제적 활용 가능성을 확인해 보고자 한다. 구체적으로 본 논문에서는 붓스트랩 방법을 활용하여 운영리스크 VaR의 신뢰구간을 생성함으로써 운영리스크 VaR 추정값의 안정성을 검증하는 기법을 제안하였으며, 이를 토대로 적합에 따른 운영리스크 VaR 추정값의 안정성을 측정하는 방안도 제시하였다. Operational risk is defined as the risk of loss resulting from inadequate or failed internal processes, people and systems, or external events. The advanced measurement approach proposed by Basel committee uses loss distribution approach(LDA) which quantifies operational loss based on bank's own historical data and measurement system. LDA involves two distribution fittings(frequency and severity) and then generates aggregate loss distribution by employing mathematical convolution. An objective validation for the operational risk measurement is essential because the operational risk measurement allows flexibility and subjective judgement to calculate regulatory capital. However, the methodology to verify the soundness of the operational risk measurement was not fully developed because the internal operational loss data had been extremely sparse and the modeling of extreme tail was very difficult. In this paper, we propose a methodology for the validation of operational risk measurement based on bootstrap confidence intervals of operational VaR(value at risk). We derived two methods to generate confidence intervals of operational VaR.
PCR을 이용한 glyphosate 저항성 콩의 검출법에 관한 연구
김현중,박선희,김해영,Kim, Hyun-Joong,Park, Sun-Hee,Kim, Hae-Yeong 한국식품과학회 2001 한국식품과학회지 Vol.33 No.5
본 연구는 유전자재조합 기술에 의해 개발된 glyphosate에 내성을 가지고 있는 콩(GTS)의 모니터링을 위하여 PCR을 이용한 검출 방법에 대한 실험을 수행하였다. Glyphosate에 내성이 있는 콩에 삽입된 유전자와 표준대조 유전자인 lectin과 ferritin 유전자를 근거로 제작된 primer와 CTAB 방법으로 추출된 콩의 DNA를 template로 이용하여 PCR을 수행하였다. GTS의 검출을 위한 제작된 primer들은 GTS와 특이적으로 반응하여 증폭된 PCR 산물을 생성하였으나, non-GTS와는 PCR 산물을 생성하지 못했다. 증폭된 염기서열 분석을 통하여 GTS에 특이적인 것을확인하였으며, 약 0.05%가 포함되어 있는 GTS까지 검출이 가능함을 보였다. A method using PCR was developed for the monitoring of glyphosate tolerant soybean (GTS) produced by the DNA recombination technique. We designed 3 pairs of specific oligonucleotide primers based on the gene sequences inserted in soybean and in lectin and ferritin genes as internal standards. Template DNAs were isolated from soybeans by the modified hexadecyl trimethyl ammonium bromide (CTAB)method and used for PCR with different primer sets. PCR, used with specific primer sets for GTS detection, showed the amplified DNA fragments with GTS template DNA but no product showed with non-GTS template. PCR amplified products were confirmed by DNA sequencing and were detected for up to 0.05% of GTS template DNA.
요통(腰痛) 환자에 대한 이침(耳鍼)의 침자수법(鍼刺手法)에 따른 치료효과(治療效果)의 임상적(臨床的) 고찰(考察)
김현중,김민수,이은용,박영재,Kim, Hyun-joong,Kim, Min-soo,Lee, Eun-yong,Park, Young-jae 대한침구의학회 2004 대한침구의학회지 Vol.21 No.1
Objective: The purpose of this study is to evaluate the effect of auricular acupuncture therapy by using different techniques combined with common acupuncture treatment on lumbago patients. Methods: 30 patients with lumbago who were hospitalized in Semyung Univ. Oriental Medical Hospital were devided into three groups. Group A of 10 patients were treated by common acupuncture treatment and auricular acupuncture therapy by methods of burying needles. Group B of 10 patients were treatedd by common acupuncture treatment and auricular acupuncture therapy by methods of pricking needles. Group C of 10 patients were treated only by common acupuncture treatment. The pain scale and improvement index of these three groups were evaluated after 10 days of admission. Results: 1. On the score of pain scale, group A and B were both superior to group C, but had no specific difference(p=0.15). 2. On the score of improvement index, group B was superior to group A, and group A was superior to group C(p=0.04). Conclusions: The combination of auricular acupuncture therapy and common acupuncture treatment was more effective than only to use common acupuncture treatment to lumbago patients. Especially, using the auricular acupuncture therapy by pricking methods, was the most effective methods in increasing improvement index.
김현중,김민수,박영재,이은용,Kim, Hyun-joong,Kim, Min-soo,Park, Young-jae,Lee, Eun-yong 대한침구의학회 2004 대한침구의학회지 Vol.21 No.6
Objective : This study was performed to examine the Magnetic therapy decrease the allergic reaction of Bee Venom. Methods : We injected BV to sample group(n=10) and control group(n=10) at 2 points of body, and also sample group was treated with Magnetic therapy additionally. We observed the change of local pain, pruritus, color difference value at 1 hour, 24 hours after injection. Results : Local pain, pruritus and color difference value of sample group were more decreased than control group. Conclusions : The Magnetic therapy decreased allergic reaction of Bee Venom.