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김기흥,류근상,신영철,이형래 진주산업대학교 산업과학기술연구소 2004 산업과학기술연구소보 Vol.- No.11
In order to evaluate six formula of T_(c) presented in the facilities criterion of small basin, the water stages were observed on fifteen mountainous small basin in Sanchung county region. The results of six formula compared with the observed data to evaluate T_(c). All basin area were less than 2.25 ㎢. The average basin area was 1.19 ㎢, the average basin length was 1.65 ㎢, the average basin slope was 6.95%, average length and slope of main channel were 1.86 ㎞ and 7%. The average T_(c) was 33.77 minutes and results of six formula showed the changes in average and standard deviation widely. The conclusions obtained in this study are as follows. The time of concentration was influenced basin slope, basin length, basin slope and channel slope consequently but did not affected the shape factor of basin.
김형철(Hyeong Cheul Kim),이승환(Seung Hwan Lee),당창권(Chang Gwan Dang),임다정(Dajeong Lim),최봉환(Bong Hwan Choi),장선식(Sun Sik Chang),조영무(Young Moo Cho),전기준(Gi Jun Jeon),박응우(Eung Woo Park),조용민(Yong Min Cho),이준헌(Jun 충남대학교 농업과학연구소 2012 농업과학연구 Vol.39 No.2
The objective of this study was to examine the effect of plasma leptin and insulin concentrations on fat traits in Hanwoo. If a biological indicator such as plasma leptin and insulin was identified, it would be a useful biological marker that can be predicted marbling score in young animal. The relationship between plasma hormone (leptin and insulin) and fat traits (marbling score, back fat thickness and P8 fat thickness) was investigated. The experiment studies 100 Hanwoo that were randomly sampled from Hanwoo Experimental Station Herd. The concentration of plasma insulin was significantly associated with marbling score (P=0.02) but was not significantly with back fat thickness (P=0.07) and P8 fat thickness (P=0.09). Statistical model determinant that plasma insulin concentration account for phenotypes was moderate on marbling score (5%), back fat thickness (3%) and P8 fat thickness (9%). On the other hand, plasma leptin concentration was significantly associated with marbling score (P=0.03) and back fat thickness (P=0.02), but was not significant on P8 fat thickness (0.07). Statistical model determinant that plasma leptin concentration accounting for phenotypes was moderate effect on marbling score (3%) and back fat thickness (2%), but it has a slightly bigger effect on P8 fat thickness (7%). In conclusion, the plasma leptin and insulin seems to have an effect on fat traits (marbling score, backfat thickness and P8 fat thickness) in Hanwoo.
한우 지방산결합단백질 4(FABP4) 유전자 조절영역내 단일염기변이(SNP)와 도체형질간 연관성 분석
이승환(Seung Hwan Lee),김남국(Nam Kuk Kim),김승창(Seung Chang Kim),최봉환(Bong Hwan Choi),허강녕(Kang Neung Heo),이창수(Chang Soo Lee),김언현(Oun Hyun Kim),이준헌(Jun Heon Lee),김형철(Hyeong Cheul Kim),홍성구(Seong Koo Hong) 충남대학교 농업과학연구소 2011 농업과학연구 Vol.38 No.4
The aim of this study was to identify the polymorphism on fatty acid binding protein (FABP4) gene promoter region and its association with carcass traits in Hanwoo. We performed PCR-direct sequencing of FABP4 promoter region to identify single nucleotide polymorphism (SNPs) using unrelated 24 Hanwoo bulls. Four SNPs (-298A>G, -472A>G, -887A>G, -862A>G) were detected in the promoter region and genotyped on 583 Hanwoo steers. A linear mixed model revealed an association of three SNPs (-298A>G, -472A>G and ?862A>G) with carcass weight and marbling score in dominance model (P<0.05). The animals with AA genotypes for the three SNPs were heavier carcass weight (5 kg) than animals with GG genotypes in the statistical analysis. For the marbling score, the AA genotype was lower effect of marbling score (0.21) than GG genotypes. In conclusion, this study indicates an important role for three SNPs detected in promoter region of FABP4 in determining carcass weight and marbling score in Hanwoo.
MATHEMATICAL MODEL FOR VOLATILITY FLOCKING WITH A REGIME SWITCHING MECHANISM IN A STOCK MARKET
( Hyeong Ohk Bae ),( Seung Yeal Ha ),( Yong Sik Kim ),( Sang Hyeok Lee ),( Hyun Cheul Lim ),( Jane Yoo ) 한국금융공학회 2014 한국금융공학회 학술발표회 Vol.2014 No.1
We present a mathematical model for volatility okcing in a stock market. Our proposed model consists of geometric Brownian motions with time-varying volatilities coupled through the Cucker-Smale ocking and regime switching mechanisms. For the all- to-all interactions where all assets` volatilities are coupled with each other with a constant interaction weight, we show that the common volatility emerges asymptotically, and discuss its _nancial applications. We also provide several numerical simulations and compare them with analytical results.
김기흥,신영철,이형래 진주산업대학교 산업과학기술연구소 2002 산업과학기술연구소보 Vol.- No.9
In order to understand hydrological characteristics in mountainous small basin, topographical characteristics of 50 mountainous small basin was investigated and analyzed previously. All the basin had area less than 5.3㎢, channel length less than 6km and channel slope less than 38% ; mean basin area was 1.38㎢, mean channel length was 1.62km and average channel slope was 15%. 44(88%) basins had basin area less than 3㎢, 38(76%) basins had basins length less than 3km and the relation between basin length L and basin area A was L=2.3022A^(0.3944). 32(64%) basins had the elevation of outlet from 200m to 400m and 37(74%) basins had channel length from 1km to 3km.
로그형 특성분포에 근거한 소프트웨어 최적 방출시기에 관한 비교 연구
김희철(Kim, Hee-Cheul),박형근(Park, Hyeong-Geun) 한국산학기술학회 2010 한국산학기술학회 학술대회 Vol.- No.-
본 연구에서는 소프트웨어 제품을 개발하여 테스팅을 거친 후 사용자에게 인도하는 시기를 결정하는 방출문제에 대하여 연구되었다. 인도시기에 관한 모형은 무한 고장 수에 의존하는 비동질적인 포아송 과정을 적용하였다. 이러한 포아송 과정은 소프트웨어의 결함을 제거하거나 수정 작업 중에도 새로운 결함이 발생될 가능성을 반영하는 모형이다. 적용모형은 여러 수명 분포들을 적합시키는데 효율적인 특성을 가진 콤페르쯔, 파레토, 로그-로지스틱 모형과 같은 로그형 특성분포를 이용하였다. 따라서 소프트웨어 요구 신뢰도를 만족시키고 소프트웨어 개발 및 유지 총비용을 최소화 시키는 방출시간이 최적 소프트웨어 방출 정책이 된다. 본 논문의 수치적인 예에서는 고장 간격 시간 자료를 적용하고 모수추정 방법은 최우추정법을 이용하여 최적 방출시기를 추정하였다.
전국 초등학교 교육시설의 단위면적당 에너지 사용실태 분석 연구
김효중(Kim Hyo-Jung),윤종호(Yoon Jong-Ho),신우철(Shin U-Cheul),조진일(Cho Jin-Il),최형주(Choe Hyeong-Ju) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
It has to take quantitative energy usage of primary school education facilities in nations to set goals of their energy reduction. Therefore, The purpose of this study is to present various analysis result of energy consumption that is a statistical analysis of primary school education facilities in Korea to set the goal of energy saving. This study has enforced analysis and has provided used energy for the year 2008 and general information from 6229 primary school education facilities in 16 cities in South Korea by the relevant agency. Used energy sources in primary school education facilities are electricity, gas for heating, oil, coal, water, and these various used energy sources have been changed as unit '㎾h' only for comparison and analysis them. The results are analyzed by local consumption of various energy sources also by the consumption of energy unit change in the primary school education facilities in South Korea.
기록값 통계량을 이용한 소프트웨어 최적 방출시기에 관한 비교 연구
김희철(Kim, Hee-Cheul),박형근(Park, Hyeong-Geun) 한국산학기술학회 2009 한국산학기술학회 학술대회 Vol.- No.-
본 연구에서는 소프트웨어 제품을 개발하여 테스팅을 거친 후 사용자에게 인도하는 시기를 결정하는방출문제에 대하여 연구되었다. 소프트웨어의 결함을 제거하거나 수정 작업 중에도 새로운 결함이 발생될 가능성이 있는 무한고장수를 가진 비동질적인 포아송 과정에 기초하고 수명분포는 신뢰도 측면에서여러 분포들을 적합시키는데 효율적인 특성을 가진 와이블분포를 이용한 최적 방출시기에 관한 문제를 제시하여 소프트웨어 요구 신뢰도를 만족시키고 소프트웨어 개발 및 유지 총비용을 최소화 시키는 최적 소프트웨어 방출 정책에 대하여 논의되었다.
임산부에서 발생한 대동맥 박리(Aortic Dissection) 1례
이정철,김영조,이형민,신동구,한승세,심봉섭,이동협,홍은표 영남대학교 의과대학 1993 Yeungnam University Journal of Medicine Vol.10 No.1
본원에서는 출산 후 지속되는 호흡곤란, 전신부종을 주소로 내원한 환자에서 임신과 관계된 De Bakey유형Ⅱ의 대동맥해리를 진단하고 성공적으로 수술을 시행한 1례를 경험하였기에 보고하는 바이다. We have experienced a case of aortic dissecting aneurysm in pregnant woman. She felt initially severe chest pain which was radiated to the neck on the 3days before delivery. Thereafter dyspnea and generalized edema were developed for 1 month after delivery. She was diagnosed as aortic dissection, Debakey type Ⅱ. During cardiopulmonary bypass, the selective cerebral perfusion was done through the right and left commom carotid arteries. Aortic replacement with Hemashield vascular graft and reimplantation of innominate artery, resuspension of aortic valve, repair of intimal tear were performed. The postoperative course was uneventful.