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김현열(Kim, Hyun-Yul),이건화(Lee, Geon-Wha),박영록(Park, Young-Rok),이승규(Lee, Seung-Kyu),박영철(Park, Young-Cheol),강용석(Kang, Yong-Seok),배철수(Bae, Cheol-soo),이진기(Lee, Jin-Ki) 한국정보전자통신기술학회 2013 한국정보전자통신기술학회논문지 Vol.6 No.2
본 논문에서는 효율적인 번호판 인식을 위하여 번호판 영역 식별과 문자 분리, 문자 인식에 적합한 번호판 인식 시스템을 위한 방법들을 제안하고자한다. 번호판 영역 식별에는 실시간 처리가 가능하도록 속도가 빠르고, 번호판 영역의 누락이 없는 방법이 필요하다. 제안된 알고리즘은 효율성을 입증하기 위하여 역전파 알고리즘만을 이용한 인식시스템과 SVM만을 이용한 인식시스템 그리고 제안한 인식 시스템을 각각 실험하였다. 그 결과 역전파 알고리즘을 이용한 경우 87.9%, SVM의 경우91.4%의 번호판 인식을 한 반면 제안된 알고리즘은 98.6%의 인식률을 나타내어 최소 7.9%에서 최대 12.2%의 인식률이 향상되었다. This study will suggest methods for a license plate recognition system that is suitable for license plate identification, separation of letters, and recognition of letters in order to recognize a licence plate efficiently. The suggested algorithm had tested a recognition system that onlyused backpropagation, a recognition system that used only SVM, and the suggested recognition system in order to prove efficiency. As a result, recognition rate had increased from the minimum 7.9% to the maximum12.2% as the case of using back propagation recognized the number platefor 87.9%, the case of using SVM for 91.4%, and the suggested had 98.6% of recognition rate.
조기 난소부전 환자에서 실시간 중합효소 연쇄 반응을 이용한 사립체 DNA copy 수의 정량적 분석
김정환 ( Kim Jeong Hwan ),이숙환 ( Lee Sug Hwan ),조성원 ( Jo Seong Won ),정혜진 ( Jeong Hye Jin ),김현아 ( Kim Hyeon A ),이윤정 ( Lee Yun Jeong ),나중열 ( Na Jung Yeol ),김인선 ( Kim In Seon ),윤태기 ( Yun Tae Gi ),강재성 ( Kang 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.1
목적 : 본 연구는 조기 난소부전의 병태생리 중 중요한 역할을 하는 것으로 알려진 세포자멸사에 사립체 DNA (mtDNA)가 연관되어 있음을 이용하여, 혈중 성선자극호르몬 증가 외에 다른 증상이나 징후가 없는 젊은 여성을 대상으로, 향후 조기 난소부전으로의 이행 가능성을 선별할 수 있는 방법을 고안하고자 계획되었다. 연구 방법 : 40세 미만의 조기 난소부전 환자군 (n=30)과 2회 이상 출산의 경험이 있고 혈중 성선자극호르몬 수치가 정상인 40세 미 Objective : To design a screening method which identifies women with a potential of progression to the premature ovarian failure (POF) in near future, particularly among young women who have high FSH level but no symptoms and signs of POF. Methods : Perip
신성열(Sung-Ryul Shin),김찬수(Chan-Su Kim),이상철(Sang-chul Lee),장원일(Won-Il Jang),윤지호(Ji-Ho Yun),임종세(Jong-Se Lim),김현도(Hyun-Do Kim),조철현(Chul-Hyun Jo) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
Estimating the physical properties of the survey area and mapping the geotechnical basement play an important role in ocean engineering and construction field. In this study, we performed marine seismic reflection and refraction survey as an engineering application at shallow marine. We made use of the dual boomer-single channel streamer as a source-receiver in reflection seismic survey and air-gun source - the manufactured OBC(Ocean Bottom Cable)-type streamer in refraction survey. In the seismic reflection data, we could easily find the geological layers and basement. Moreover, seismic refraction data could present sediment thickness and velocity distribution.
오하식,김현열,양한술,이정일,주영국,김철욱,Oh, Ha-Sik,Kim, Hyun-Youl,Yang, Han-Sul,Lee, Jeong-Ill,Joo, Young-Kuk,Kim, Chul-Uk 한국축산식품학회 2008 한국축산식품학회지 Vol.28 No.2
This study was conducted to investigate the meat quality characteristics of pork loin in 3 crossbred groups (30 pigs/group). The crossbreeds were LY female${\times}$D male, Y female${\times}$B male and L female${\times}$B male (L: Landrace, Y: Yorkshire, B: Berkshire, D: Duroc). Pork loins were collected from animals ($110{\times}120kg$ body weight) slaughtered in a commercial slaughter house and stored at $-3^{\circ}C$. Samples were analyzed for general composition, physico-chemical properties, meat and fat color, texture characteristics, sensory evaluation and fatty acid composition at 24 hrs postmortem, and TBARS (Thiobarbituric Acid Reactive Substances) values were determined at various storage times. The LYD pigs showed a higher back fat thickness than the YB and LB pigs. There were no significant differences in intramuscular fat, intermuscular fat, subcutaneous fat and springiness among the 3 crossbreeds. In addition, there were no significant differences in general composition, pH, drip loss, cooking loss and cooked sensory evaluation among the 3 crossbreeds (p>0.05). The shear force value of LB pork was significantly lower than other crossbreeds (p<0.05). Total heme pigment was significantly higher in YB pork compared to LYD and LB pork (p<0.05). The TBARS value of YB pork was significantly lower than that of LYD pork, except after the I day of storage (p>0.05). TBARS values increased significantly during storage for all three crossbreeds. The lightness (CIE L) of YB pork was significantly lower, while the redness (CIE a) was significantly higher in YB pork relative to the other crossbreeds. With regard to textural properties, the hardness and adhesiveness values were significantly lower in YB pork compared to LB pork. In fresh meat, the color of YB pork was significantly higher than the other breeds (p<0.05). The content of myristic acid (C14:0) was significantly lower, while the content of arachidonic acid (C20:4) was significantly higher in LB pork (p<0.05). These results show that the YB breed has the highest quality meat of the three crossbreeds.
김주철 ( Joocheol Kim ),김현열 ( Hyun Yeol Kim ) 연세대학교 경제연구소 2015 延世經濟硏究 Vol.22 No.2
본 연구에서는 한국의 기업크기분포의 우측 꼬리 부분을 scaled Log phase-type 분포로 추정함으로써 그 tail index 값을 추정하고자 한다. 금융기업과 비 금융기업 모두를 포함한 외부 감사의 상이 되는 기업들을 대상으로 연구를 수행한 결과. 기업 크기의 대리변수를 어떤 것으로 선택하든지 간에 본 연구에서 사용된 방법이 Hill estimator 를 포함한 이전의 방법보다 tail index를 효과적으로 추정하는 것으로 나타났다. Tail index 의 추정치는 기업 크기의 대리변수에 따라. 그리고 경기에 따라 다르게 계산되었으며. 이는 기업의 크기 분포가 반드시 zipf`s law 를 따르지는 않는다는 것을 보여준다. 나아가 1997년과 2007년 전후로 기업크기분포의 우측 꼬라가 더욱 두꺼워진 것을 확인할 수 있는데. 이는 금융위기가 기업들 간의 자원 분포에 분명한 영향을 준다는 것으로 해석할 수 있다. This study estimates the tail index of firm size distribution in Korea, by fitting its right tail to a scale Log phase-type distribution. We use the sample of statutory-audited firms, including both financial and non-financial companies. Regardless of the choice of proxy for firm size, our estimator fits the extreme tail of distribution better than the previous methods, such as the popular Hill estimator. The estimates of the index vary across different firm size measures and the tail index vary across different firm size measures and the economic statuses, indicating that firm sizes do not necessarily follow the Zipf`s law. Furthermore, the upper tail of the firm size distribution in Korea becomes thicker during the financial crises in 1997 and 2007-2008. This adds to the evidence that the allocation of resources across firms is affected by financial crises.