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김종환,홍재승 한국스포츠산업경영학회 2003 한국스포츠산업경영학회지 Vol.8 No.2
프로축구리그관중의 만족도와 재구매의도의 상관요인분석에 관한 연구김종환 (중앙대학교), 홍재승 (서울대학교)
New Aggregation Algorithm for Tandem queue with Finite Buffers
김종환,Hur, Sung Kwan,徐承祿 大邱大學校附設 基礎科學硏究所 1991 基礎科學硏究 Vol.8 No.-
We consider a two-stage fmite tandem queueing system with Poisson arrivals and negative exponential service times. The customer who has completed his service at the first station has to go directlty to the second station. If the queue of the second station is full at the moment of the service completion of the customer at the first station, then the customer receives, another service at the first station. This is repeated until the customer completes a service at the first station at the moment that the second station is not fulL The problem of calculating the steady-state probabilities of this queueing system by the ordinary balance equations is time consuming. We develop an efficient algorithm to obtain the steady-state probabilities that utilize the two-way state aggregation techniques.
구순열·구개열 환자 및 부모의 혈액형에 관한 임상적 고찰
이세일,주철근,홍인표,김종환 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.3
Among the congenital anomalies, the incidence of cleft lip & palate is higher in orientals, is higher and more severe on the left than right side, more cleft lip in men, and more cleft palate in women, the blood type A is relatively more frequent than other blood type in cleft patients, but the interrelationship between the incidence and blood type in cleft patients and their parents, we are studied on interrelationship. Of the 183 patients who received the operation due to cleft lip & palate from March 1986 to July 1992, we have obtained the results as follows by the analysis of the interrelationship between the incidence and the blood type of the patients & their parents. The number of patients of each blood type was as follows ; A (81/183.44.3%), B(36/183,19.7%), AB(21/168,12.5%), O(39/168,22.6%), and of paternal blood type was A(24/135,17.8%), B(30/135,22.2%), AB(39/135,28.8%), O(42/135,42%). The incidence of cleft lip & palate was higher in blood type A patients(81/183,44%), blood type A mothers (84/168,50.0%) aud blood type O fathers(42/135,42%) but there was no correlation between the patient's blood type and parents' blood type.
김종환,이기범,이경용,Kim, Jong-Hwan,Lee, Kee-Bhum,Lee, Kuong-Yong 한국군사과학기술학회 2005 한국군사과학기술학회지 Vol.8 No.2
The thermomechanical characteristics were evaluated for 17-4PH stainless steel widely used in supersonic airframe subjected to both aerodynamic loading and heating. The thermomechanical tests were conducted under both elevated temperature and rapid heating condition from $1^{\circ}C/sec\;to\;28^{\circ}C/sec$. The thermomechanical behaviors under rapid heating were compared with those of elevated temperature after 1/2 hour exposure in terms of yield stress to investigate the influence of heating rates. A heating rate-yield temperature parameter was suggested for rapid heating based on time-temperature parameters, and master yield stress curve was obtained by using these parameters. The experimental results and methodology from this study can be used as basic engineering data when designing supersonic vehicle structures subjected to aerodynamic loading and severe heating environment.
팽성숙,장효죽,홍인표,김남호,서정일,김종환 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.6
A painful neuroma in the hand can be psychologically and physically disabling. The difficulty in alleviating the problems is attested by the numerous methods of treatment espoused in the literature. Traumatic neuroma was first described by Odier in 1881. He described the enlargement or swelling which develops at the distal ends of the proximal segments of peripheral nerves after partial or complete division and spoke of these as nerve tumors. In 1920 Huber and Lewis published reports of their experimental work in the prevention and causes of traumatic neuromas. Little of practical significance has been done since the work of Huber & Lewis, and most surgical techniques of today are still based on their experiments. There is no procedure that is completely and consistently successful in preventing neuroma formation. Altyough some different technique have been described, successful method of treatment hasn't been found as ever. These treatments include crushing the neuroma, ligating it, burying it in soft tissue or bone, injecting it with alchohol, or gentian violet, capping it with a silicone cuff, or pulling a perineurial sleeve over the axial ends. In spite of its advocates, these methods was insufficient as well. So the authors carried out animal study to find out the better operative procedure to prevent the traumatic neuroma. In the result of study, epineural closure combined with the use of chemical coagulent (5-flurouracil) in the severed end was satisfactory method compared with the others.
전기영동을 이용한 한국산 다슬기과(Pleuroceridae)의 계통분류
김종환,정우석 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1
Electrophoretic analysis has been used frequently to quantify genetic variability in many organisms. Isozyme variation between species of Pleuroceridae was analyzed by an electrophoretic technique. Pleuroceridae is consisted of two genus (Semisulcospira and Koreanomelania) and each genus is consisted of six species and three species, respectively. Among the Pleuroceridae, two genus and six species were analyzed. Each species of Pleuroceridae was collected in Nam-hangang and Kumgang. In SDS-PAGE patterns there are no distinctive differences among species. But in isozyme analysis using 7 isozymes (Esterase, Acid phosphatase, Alkaline phosphatase, Malate dehydrogenase, Alcohol dehydrogenase, Catalase, Peroxidase) of them. Semisulcospira libertina and S. coreana are the most highly related (0.86). S. gottschei is the least lowly related (0.44). Koreanomelania globus (0.62) is more related than S. tegulata (0.52) but less related than S. forticosta (0.67). The order of similarity relationship from S. libertina is S. coreana, S. forticosta, K. globus, S. tegulata and S. gottschei.