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이상락,심재홍,Lee, Sang-Rak,Sim, Jae-Hong 한국정보처리학회 1994 정보처리논문지 Vol.1 No.2
곡선의 신속한 컴퓨터 그래픽의 고속 처리를 가능하게 하는 중요한 기법 중의 하나이다. 이것은 현재 하드웨어나 소프트웨어를 통하여 상당한 효과를 거두고 있으 나 급속한 그래픽의 발전은 보다 빠른 곡선 생성 방법을 요구한다. 본 논문은 전향 차분을 이용하므로써 곡선 상의 점의 좌표를 곱셈을 배제하고 덧셈만으로 계산하여 보다 빨리 곡선을 그릴 수 있는 한 알고리즘(CDAUD라 부름)을 제시한다. CDAUD는 곡선 이 부드럽고 완전하게 연결된 상태로 그려지도록 하는 방안을 포함하고 있다. CDAUD 의 시간 복잡도(time complexity)는 그리는 곡선에 따라 기존의 방법보다 우수한 경 우도 있음을 실험을 통하여 확인할 수 있었다. Fast curve generation is one of important techniques which facilitate fast process of computer graphics applications. It is possible to resolve the task through hardware or software. But rapid development of computer graphics area need methods for more fast generation of curves. This paper propose a algorithm (called CDAUD), which computes the coordinates of points on curve only with add operations using for ward differences and draw the curve fast. It also contains the method for generation of smooth and fully connected curves. Time complexity of CDAUD shows that it is superior than the existing method for constrained case, and it's superiority was validated through experimental implementation.
이상락,김천수 대한신생아학회 2013 Neonatal medicine Vol.20 No.3
Meconium is a strong inactivator of pulmonary surfactant. The deficiency of surfactant or surfactant dysfunction may contribute to respiratory failure in a wide group of disorders, including meconium aspiration syndrome (MAS). We reviewed the effect of pulmonary surfactant therapy for severe MAS in ours as well as other countries. In general, surfactant therapy improves pulmonary oxygenation (oxygenation index or arterial/alveolar oxygen tension) and reduces the requirement for ventilation, and oxygen supplementation or hospitalization time. However,its effects on mortality and pulmonary or extrapulmonary complications are variable. In Korean studies, outborn infants are five times more common than inborn infants; therefore, the initial hospital care at delivery including adequate tracheal suctioning is important to improve the outcome of patients with severe MAS. To confirm the effect of surfactant therapy in MAS, additional well-designed,multicenter, randomized, controlled trials are needed. In addition, determining the optimal type of surfactant therapy (bolus, lavage, or combined) and the appropriate dose and duration of therapy is important.
이상락 대구보건전문대학교 2006 대구보건대학 論文集 Vol.26 No.-
The study is to find out substantial influences on customer satisfaction with the patients in the five hospitals in Daegu metropolitan city. As for the factors of the influences, the study made an analysis on the environment of hospital facilities, quality of medical treatment, kindness of doctors and staff, and the evaluation of hospital in general. The patients as customers rated the environment of hospital facilities to be satisfactory, but they showed a negative response to the hospital management. The quality of medical service and the kindness of doctors turned out to be relatively satisfactory. However, waiting time for medical procedures or medical examinations took long from 10 minutes to 30 minutes. Outpatients reacted negatively in the kindness of staff by not responding, but accessed positively in the satisfaction of overall medical service. In terms of the services that hospitals offer, the participants rated good in spite of the fact that some did not respond. The kindness of staff needed to improve through education. The factors that affect satisfaction of hospital customers, that is, patients, make forceful management avoid in the recent medical business. Since it is obvious that hospitals win collapse without customer satisfaction, the study regarding effective management needs to be continuous and its result should be reflected in the hospital management. For the improvement of customer satisfaction, first, all the staff's mind and behavior need to change through a regular evaluation from a medical institution. Second, a survey. on customer satisfaction and subsequent education need to follow for the enhancement of medical quality and kindness. Third, motivating for customer management, holding a conference, and prizing for its good result also need to follow. Finally, it is important to remember that it takes a great deal of time and effort as we11 as consistent willingness by chief executive officers of the hospitals.
이상락,박문성,차춘남,심정택,차병철 대한산업공학회 2012 산업공학 Vol.25 No.2
In the postal delivery service, both the standardization of business process and the workload measurement is very important part of saving the cost and improving the efficiency. However, these are not easy to apply to real situation because of the labor-intensive and diversification of delivery environment. In this study, we develop the methodology for the standardization of business process and workload measurement model of the postal delivery service. Firstly, we introduce the work factor analysis on the postal delivery process. Then, we propose the methodology workload measurement model based on diversification of delivery environment.