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.

The relationship study of service experience factors on customer satisfaction and repurchasing intention in professional soccer league

김종환,홍재승 한국스포츠산업경영학회 2003 한국스포츠산업경영학회지 Vol.8 No.2

프로축구리그관중의 만족도와 재구매의도의 상관요인분석에 관한 연구김종환 (중앙대학교), 홍재승 (서울대학교)

일본 언론의 국제화

김종환 사회과학원 1994 계간 사상 Vol.21 No.-

베르디의 『맥베스』 변형과 다시쓰기

김종환 한국셰익스피어학회 2019 셰익스피어 비평 Vol.55 No.3

Giuseppe Verdi is an Italian composer who emphasized not only musical performance but also theatricality in opera. In his work, music and drama complement each other. It is natural that Verdi, who empathized on the theatricality of the opera, referred to the Shakespeare plays. There are two different editions of Verdi’s Macbeth, the original libretto published in 1847 by Piave and the revision used for the production in Paris in 1865. The critics estimate that the opera based on 1865 revised edition not only presents more sophisticated musical composition than 1847 but also shows a better dramatic arrangement. This paper discusses the issues relating to the 1865 revision of the opera and its adaptation. It focuses on Giuseppe Verdi’s deletion, transformation, reduction, compressing, and adding of Shakespeare’s play Macbeth. Another focus of discussion is Verdi’s way of reconstructing and representation of Lady Macbeth.

급성기 뇌졸중 환자의 한양방 협진치료에 대한 임상적 고찰

김종환,신우진,장자원,김지윤,민성순,황원덕,Kim, Jong-Hwan,Sin, Woo-Jin,Jang, Ja-Won,Kim, Ji-Yun,Min, Sung-Soon,Hwang, Won-Duek 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.4

Object : This is a study of acute stage stroke patients designed for comparison of combined Eastern and Western medical treatments and Oriental treatments alone. Methods : 51 patients were diagnosed by Brain-CT and Brain-MRI scan as having suffered stroke. They had entered Dong-eui hospital within seven days of attack, and remained over seven days, all between November 2002 and August 2003. Patients were divided into two groups: a group treated with both Eastern and Western medical treatments, and a group treated only with Oriental medical treatments (but examinations were done and medications were given in hypertension, Diabetes Mellitus and so on). Results : The Eastern-Western medical treatment group showed significant changes in NIHSS. A rate of improvement figure of 24.94% was obtained for the Eastern-Western medical treatment group, and for the Oriental medical group a figure of 7.84% was obtained. Conclusion : The East-West medical treatment group had significant rate of development that measure for NIHSS by treated comparatively dependent patients. And oriental medical treatment group had significant rate of development that measure for NIHSS by treated comparatively independent patients. The NIHSS measure for the Eastern-Western medical treatment group shows a significant rate of improvement for relatively dependent patients, and the NIHSS measure for the Oriental medical treatment group shows a significant rate of development for relatively independent patients.

치매전문병원 물리적 환경요인 분석을 통한 건축계획연구 -시․도립 치매 전문병원의 주된 3가지 평면유형 사례를 중심으로-

김종환,김명근 한국디지털건축·인테리어학회 2008 한국디지털건축인테리어학회 논문집 Vol.8 No.2

The purpose of this study is to analyze behaior character of dementia patients and physical environment problem through survey, research and interview on the problems arising from the dementia specialized facilities and according to the data from it, suggesting a plan to improve physical environment and design guideline. Three hospitals were chosen, which had both private space, public space and semi-public space, and dementia patients were chosen from them, who were able to move room to room by themselves.

네이버 어학사전의 현황과 미래

김종환 한국사전학회 2011 한국사전학회 학술대회 발표논문집 Vol.2011 No.2

행콕 판막의 내구성

김종환 대한흉부심장혈관외과학회 1989 The Korean Journal of Thoracic and Cardiovascular Vol.22 No.6

The Hancock porcine xenograft valves had been used in Seoul National University Hospital, mainly because of their antithrombogenicity despite of the predicted failure, from March 1976 to April 1984, and a total and consecutive 163 patients were retrospectively studied for late results with the special stress on the structural failure. The hospital mortality rate [within 30 days] was 6.1 %, and the 153 early survivors were followed up for a total of 822.9 patient-years [p-y][Mean * SD 5.38 * 3.02 years]. The linealized late mortality was 1.823%/p-y. Four major complications related to the Hancock valve were: 1.822% thromboembolism/p-y; 0.729 % bleeding/p-y; 0.972% endocarditis/p-y; 3.646% overall valve failure/p-y and 2.187 % primary tissue failure [PTF]/p-y. The actuarial survival rates at 5 and 10 years were 94.90 * 1.89% and 80.58 * 5.21 %; and the probabilities of freedom from thromboembolism at 5 and 10 years were 90.93 * 2.63% and 83.35 * 7.64 9o respectively. The probabilities from PTF at 5, 10 and 12 years were 98.02 * 1.39%, 60.62 * 8.89% and 49.60 * 12.34 %. One hundred-eighteen patients [72.4%] had single MVR [age, 34.0 * 10.9 years] with the operative mortality rate of 4.2%; and 113 early survivors were followed up for a total 616.4 patient-years[5.46 * 2.96 years]. The late mortality rate was 1.460 %/p-y. The major complications were: 1.622 % thromboembolism /p-y; 0.487% bleeding/p-y; 0.649 % endocarditis/p-y; 2.920% primary valve failure/p y and 1.785% PTF/p-y. The actuarial survival rates were 97.08 * 1.67%[at 5 years] and 81.27 * 6.64%[at 10 years], and the probabilities of freedom from thromboembolism 92.44 * 2.76 %[at 5 years] and 80.89 * 11.08%[at 10 years]. The probabilities of freedom from PTF at 5 and 10 years were 98 70 * 1.29% and 65.59 * 9.78% respectively. The mean age of 11 patients of PTF was 25.7 * 8.8 years and the valve extraction period 7.16 * 1.45 years. Failure of bioprosthetic xenograft valves are reportedly known to occur earlier in young patients in an accelerated fashion. The study with two groups divided into the cumulative younger and the cumulative older patients according to the age limits of 5-year interval strongly suggested these tendency. Although PTF began to occur past postoperative 5 years and the probabilities of freedom from PTF increased as the age limits raised and the number of patients increased in the cumulative younger patients while they decreased as the age limits lowered and the number of patients increased in the cumulative older patients, the definite age limits from which the Hancock valve can be safely recommended could not be obtained. From the results, the Hancock valves are contraindicated in patients younger than 20 to 25 years and may be safely recommended in patients older than 45 years as a tentative conclusion. Further longitudinal study may define these age factors.

미디어노출 지수분석을 통한 프로축구단 가치평가 연구

김종환 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study was to appropriate value of reasonable Professional Football Club through media exposure Index Investigation, Media exposure Index estimation used newspaper exposure analysis method by classified Club and Newspaper, Investigation target, limited by Professional Football article which was printed In sports page of 4 sports dailies and 10 synthesis dailies. After Media exposure Index imposed weight of each 50% in report frequency and report area. The result was as following. First of all, the relative value of Professional Football was available quantification Relative value of classified by Professional Football Clubs could do quantification by brand Image Index which this research have defined. Also, according to Interrelation analysis of numerical value which is derived in index production formula, we can explain that as media exposure Index Is high, value Is high. Secondly, media exposure index appeared high as team result Is high This truth was proving what media exposure Indexes were high among high position Football teams which percentage of victories was high This truth that This index which was decided by sporting newspaper report's report frequency and area was receiving big effect In team results agrees with general customs. Through this research, hereafter, as adopting profit maximization model escaping in percentage of victories maximization model when professional club which was situated in definite point of inspection sports industry keep the balance in the black ,activation of domestic sports industry can be made fast. If the time is advanced, Professional Football Club would have to be operated focusing on club value raising.

사모의 역할은 어디까지

김종환 두란노 2005 목회와 신학 Vol.- No.190