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洪淳錫,崔寧峻 弘益大學校 産業技術硏究所 2005 産業技術 Vol.15 No.-
While everyone who uses electric power desires perfect frequency, voltage, stability, and reliability at all times, this cannot be realized in practice. The supplying utility cannot be expected to provide a perfect power supply because many of the causes of power supply disturbances are beyond the control of the utility. The outage happens but due to many reason. The electricity equipment requires consequently the emergency power supply. We classify the subordinate for quick supply of the emergency power supply and must grope the supply plan. We will find out in this paper through the case study about the emergency power efficient operation plan.
김명철,장석진,이교영,김남중,변홍섭,박명호 충남대학교 수의과대학 동물의과학연구소 1995 動物醫科學硏究誌 Vol.3 No.-
Three dogs which show clinical signs of cystic calculi with anorexia, hematuria, stranguria, dribbling of urine, and pain in posterior abdomen, were referred, and diagnosed as cystic calculi by radiography and ultrasonography. Removal of urinary cystic calculi was performed by urinary cystotomy. Calculi, removed surgically, were analyzed chemically and microscolically. Calculi from three patient dogs were calcium carbonate in all. After the removal of calculi recurrence of urolith were not observed up to nowadays for about 4-10 months.
Hong, Young-Seuk,Bunton, Clifford A 啓明大學校 生活科學硏究所 1981 科學論集 Vol.7 No.-
p-nitrophenyldipenylphosphate (p-NPDPP)가 芳香族 imidazole陰 ion들과 反應하여 脫燐酸化될때, 相轉移觸媒(phase transfer catalyst)인 tri-n-octylethyl ammonium bromide(TEABr)는 반응속도를 ??배까지 증가시킨다. 이것은 反應次數가 基質(p-NPDPP), imidazole陰 ion 그리고 TEABr에 대하여 각각 1보다 큼을 의미한다. 한편 TEABr은 imidazole을 脫水素化하여 imidazole 陰 ion 을 만들지 않으며, ??와 p-NPDPP의 반응속도를 증가시키지도 않는다. 또한 cetyltrimethylammonium bromide (CTABr)은 수용액속에서 그 농도가 critical micellar concentration(cmc)보다 적을 때 p-NPDPP의 脫燐酸化反應을 효과적으로 촉진시킨다. 그러나 이 조건하에서의 반응차수는 p-NPDPP에 대하여 1보다는 적다. 이것은 TEABr과 반응물질들로부터 반응성이 큰 集合體(reactive aggregates)의 형성이 반응속도 증가에 공동작용적현상(cooperative phenomenon)을 나타내기 때문이며 한편 수용액 속에서 micelle이 형성될 수 없는 cmc以上의 농도(submicellar concentrations)에서의 CTABr에 의한 반응촉진은 TEABr과 반응물질들에 의해 형성된 集合體들과는 다른 모양의 集合體를 포함한다는 것을 뜻한다. 이것을 micelle 형성(micellar formation) 또는 micelle 보다 작은 集合體(submicellar aggregates)라는 말대신 “유도된micelle化”(induced micellization)란 말로 표현하는 것이 좋을 것 같다. The phase transfer catalyst, tri-n-octylethylammonium bromide(TEABr) effectively catalyzes reaction of p-nitrophenyldiphenylphosphate (p-NPDPP) with benzimidazolide and naphth-2,3-imidazolide ion (??and ??) with rates increased by factor up to ??. Reaction order is 〉1 with respect to substrate, arene imidazoles and TEABr, suggesting that reaction is occuring on small aggregate of the three solutes. Tri-n-octylethylammonium bromide does not increase deprotonation of the imidazoles or the rate of reaction of the p-NPDPP with ??. Micelles of cetyltrimethylammonium bromide (CTABr) are effective catalysts of the reactions of p-NPDPP at [CTABr] 〈 critical micellar concentration(cmc) in water, but under this condition the order is less than one with respect to p-NPDPP. It appears that formation of reactive aggregates from TEABr and the reactants is a cooperative phenomenon, and that catalysis by CTABr in submicellar concentrations below the cmc in water involves aggregates different from those formed by TEABr and the reactants, and can best be described in terms of “induced micellization” instead of micellar formation or submicellar aggregates.
홍영준(Hong, Young-Jun),최두석(Choi, Doo-Seuk),정영철(Jung, Young-Chul),김종일(Kim, Chong-Yeal) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.10
최근에 연비향상을 위해 다양한 기술들이 개발 중에 있다. 본 연구의 목적은 배기열 재순환장치의 열교환 성능을 평가한 후 최적 성능의 모델을 제안하는데 있다. 이 장치는 버려지는 배기열을 이용하여 가능한 한 빠르게 엔진 냉각수를 웜업 시키도록 설계하였다. 이 목적을 달성하기 위하여 CFD를 이용하여 냉각수의 흐름 방향과 냉각 수의 유입 유출 위치에 따른 열유동 특성을 분석하고, 열교환 효율을 상승시키기 위한 방법을 제시하였다. 그 결과 냉각수 유량이 적고, 배기가스와 냉각수의 유로를 각각 구성하여 배기가스의 열이 직접적으로 냉각수에 영향을 미치 는 구조가 가장 열교환 효율이 좋은 것으로 나타났다. Recently, various technologies for the fuel efficiency improvement are being developed. The purpose of this study is to evaluate the heat exchanging performance of a exhaust heat recirculation device and to propose a model with optimized performance. The device has been designed to warm up engine coolant as quickly as possible using wasted exhaust heat. To achieve these goals, heat transfer characteristics has been analyzed using CFD for the flow direction effect and in/out location effect of coolant. A method improving the effectiveness of heat exchange has been proposed. As a result, the highest efficiency in heat exchange was observed on condition that exhaust heat affects the coolant directly with a separate flow path between exhaust gas and coolant and that coolant flow rate is relatively low.
홍영준(Young-Jun Hong),최두석(Doo seuk Choi),정영철(Young-Chul Jung),김종일(Jong-IL Kim) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.5
In this study, we publish the results from my research work using CFD of exhaust heat recirculation device. This study can evaluate the heat exchanger and suggest optimization model base on CFD. Also this study suggest the method of heat transfer efficiency by analyzing thermal hydraulic performance according to internal fluid flow and in and out coolant. This study can contribute to make the fluid flow which is used for efficient design of exhaust heat recirculation device.
홍영준(Young-Jun Hong),최두석(Doo seuk Choi),신석재(Suk-Jae Shin),이경태,정영철(Young-Chul Jung),김종일(Jong-IL Kim),김희진(Hee-Jin Kim),윤영철(Young-Chul Yoon),한인수(In-Su Han) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this study, the Exhaust heat recovery system uses waste heat of cold start. This system will be improved efficiency regarding oil temperature of car engine at the beginning, then it will be improved efficiency of fuel efficiency and car engine. This study has developed exhaust heat recovery system because of checking the fast warm-up of the engine. There are heat exchange area of the exhaust gas and cool water within exhaust heat recovery system. It made the area different so that this study can check the performance regarding exhaust heat recovery system. The performance evaluation use the a gasoline engine. This test has proceed in the condition. The condition of warm-up fitted with Load-0%. after that the study checked the time from starting up the engine to warm-up. So this study can confirm to shortening the time of warm-up of exhaust heat recovery system.
User friendly molecular breeding platform by analyzing soybean genomes
Yul Ho Kim,Tae-Young Hwang,Hyang Mi Park,Seuk Ki Lee,Man Soo Choi,Kwang Ho Jeong,Min Jung Seo,Hong Tai Yun,Sun Lim Kim,Young-Up Kwon,Ik-Young Choi,Ho-Sung Yoon,Suk-Ha Lee,Jong Bhak,Sunghoon Lee 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Resequencing data is actively used for searching QTL or analyzing genetic diversity in the crops. However, the complexity of genome, caused by genome duplication, limits the utility of genome-wide association studies and linkage analyses to identify genes that regulate agronomically valuable traits. Here, we propose a comparative genomics approach based on core or common variation-based recombination blocks (CRB) using single nucleotide variation (SNV) density information. We found that the soybean genomes are assembled with long and distinct CRBs as large as 10Mb. CRB-based comparative genomics enabled us to accurately identify recombination blocks at the whole-chromosome level. We identified the Ih locus that determines the yellow hilum color in soybeans using CRB-based mapping with representative indel markers. These results suggest that the CRB-based comparison method is a promising platform for molecular breeding and map-based cloning.