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김상직,홍성조 한국경영과학회 1998 한국경영과학회 학술대회논문집 Vol.- No.1
We consider a multiclass production system processed by a single machine with cyclic order. Each part belongs to one of several classes and arrives at each queue in a poission process. The processing displine at each queue is either exhaustive or gated. We introduce a new approach to analysis of mean waiting times for each queue. We formulate mean waiting times as a cost function of the system state.
金相直,黃一愚,徐輔祥,尹健鎬 경북대학교 의학연구소 1966 慶北醫大誌 Vol.7 No.1
Peritonitis caused by the perforation of the ileum often is a complications of the systemic diseases such as typhoid fever or other kinds of salmonellosis. Since this complication usually takes place at the second or third week of the disease course, the patient's condition is generally poor. The choice of the methods of surgical operation for the peritonitis depends upon the general condition of the patient and upon the intraabdominal state. During 5 years (1957-1962), of the 141 cases, 80 cases were operated by the method of the debridement and simple closure, 60 by recection of the involved intestine followed by end-to-end anastomosis and one case was treated by exteriorization of the involved ileum expecting the secondary surgical intervention after his general condition had improved. The rates of the mortality and of the reperforation were higher in the former group. Since Oct.1962, we treated 46 cases of the peritonitis by the method of simple closure and resection alternately except extremely poor risk patients in attempt to establish more favorable result. The result of these studies shows that the mortality rate was lower in the resection group and postoperative complications were almost epual.
高 및 低蛋白食으로 飼育한 白鼠에 있어서 血中 放射能標識 Amino酸이 各組織蛋白 合成에 編入되는 速度에 關하여
金相直 慶北大學校 醫科大學 1967 慶北醫大誌 Vol.8 No.2
Comparisons were made on incorporation of intravenously injected amino acid mixed-C^14 (Algal Protein Hydrolysate-C^14) in plasma and tissue proteins between high and low protein diet rats. 1) Prel minary experiment revealed that 15 hour of fasting after the administration of amino acid mixed-C^14 seemed to be adequate to observe the maximum incorporation of the amino acid in plasma and liver proteins and the minimum activity of nonprotein-C^14 in plasma. 2) The incorporation of amino acid mixed-C^14 in tissue protein, at the 15th hour of fasting, was remarkably higher in liver, kidney, spleen, adrenals, and intestine on both high and low protein diet rats. 3) A comparison of the incorporated C^14 activity in tissue protein of both rats revealed a higher tissue protein C^14 activity in most tissues of low protein diet rats; especially in the liver, it was 2 times as high. 4) Total non-protein-C^14 activity excreted in urine for 15 hours showed no significant difference between both rats: in high protein diet rat 6.8±0.78% of the injected; and in low protein diet rat 5.7±0.87%. 5) Amino acid nitrogen concentration in each tissue showed no significant difference between both diets rats.
김상직(Sang-Jik Kim),장우진(Wo-Jin Jang) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-
최근 대형 전력시설물에 대한 VE와 LCC 기법의 도입은 여러 가지 형태로 수행되고 있으며, 일반적으로 전력 시설물의 비용을 생각할 때 그 초기투자비만을 대상으로 평가하는 경향이 있으나 시설물의 총 생애비용 (보전비, 수선비, 개선비, 운용비, 전력비등)을 동시에 고려하여야 한다. 본 연구에서는 간선설계에서 장거리 급전시 전압강하로 인한 동손비를 고려한 설계기법과 내구년한에 따른 총생애비용기법을 적용하여 타당성을 입증 하였다.
김상직,주용준 대한안전경영과학회 2000 대한안전경영과학회지 Vol.2 No.3
It is very important to delivery timely and safely items in logistics. So, the home delivery service system is introduced by many enterprises. Also, the beginning in 1990's, the rapid increase of automobile increased logistics cost and led to road stagnation. So, the railway transportation use in logistics can be considered. The railway transportation in home delivery service system can overcome the limit of transportation by land. This study evaluate railway transportation in home delivery service system by economical efficiency and timeliness.