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정영석(Y.S. lung),이병구(B.K. Lee),강기환(G.H. Kang),소정훈(J.H. So),정명웅(M.W. lung),유권종(GW. Yu),송진수(J.S. Song) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
This paper deals with stand-alone Photovoltaic system(SPVS) with charger/discharge controller. Main power source of SPVS are generally solar cel and battery. Therefore SPVS can be classified into variable types m accordance with connection type between battery and solar cell. SPVS with charger/discharge controller which can operate solar cell a maximum power point is suggested and designed with instantaneous controller. And system operating characteristics are verifieded by experiment with a laboratory prototype in this paper.
충방전 제어기를 이용한 독립형 태양광 발전시스템의 설계
김홍성(H.S.Kim),유권종(G.J.Yu),송진수(J.S.Song),이병구(B.K.Lee),정영석(Y.S.Jeong),강기환(K.H.Kang),최규하(G.H.Choe) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
This paper deals with stand-alone Photovoltaic system(SPVS) with charge and discharge controller Main power source of SPVS are generally solar cell and battery. Therefore SPVS can be classified into variable types in accordance with connection type between battery and solar cell. Mainly used one of them is direct connection type which has advantages such as simple structure and simple controller However most big drawback of this system is energy loss by voltage disharmony between solar cell and battery. Therefore SPVS with charge and discharge controller which can operate solar cell at maximum power point is designed and ,analyzed by simulation in this paper.<br/> <br/>
인공심장판막을 가진 외래 환자에서 Warfarin에 의한 과도한 INR 상승의 치료 현황 평가
박선영,정영미,이병구,손인자,서옥경 한국병원약사회 2002 병원약사회지 Vol.19 No.2
Patients taking long-term oral anticoagulant therapy with warfarin require close monitoring to maintain their coagulation values within therapeutic range. But little has been published about the incidence of bleeding during warfarin therapy in Korea. Moreover, data on how patients experiencing asymptomatic elevations of INR being treated are scarce. We evaluated the incidence of bleeding, the method of management in case of excessive anticoagulation and their outcome in SNCH. Patients with mechanical heart valves who were being followed at anticoagulation clinic in SNUH were included in the study if they had been on warfarin for at least 6 months and had been at least one episode of INR value greater than 5. Patients' data were evaluated retrospectively by reviewing medical records and anticoagulation flowsheets. Total of 173 episodes in 132 patients were included. One hundred fifty one cases were treated conservatively by holding warfarin temporariety whereas phytonadione or FFP was given in 22 cases. No difference in the bleeding rate was shown among treatment strategies. However, the treatment with phytonadione or FFP was 3 to 94 times more costly compared to conservative management. Based on the results of this study, phytonadione or FFP administration to asymptomatic patients with INR ranging from 5 to 10 may be unnecessary. A prospective, randomized trials would help confirming the safety and efficacy of conservative management compared to other treatment modalities and determining the INR range in which conservative management would be appropriate.
김유은,서성연,한현주,이병구,조남춘 한국병원약사회 1999 병원약사회지 Vol.16 No.3
Since the medical insurance has come to cover up to 90-days at one time in outpatient base in Dec. 1995, the long-term medication(over 30days) has been increased abruptly and rapidly. The object of this study is to determine the influence of outpatient long-term medication at one visit on filling the prescription, dispensing and administration and to enlarge the effectiveness of dispensing and administration in outpatient pharmacy. We compared the data related the long-term medication in 1998 with those in 1996 in Seoul National University Hospital. The number of order day, incidence and frequency of long-term medication were reviewed in different medical department, disease group and each diseased respectively. The average waiting time for medication per year was also investigated to recognize the influence on doing dispensing and administration directly. In basic, we figured out the average number of outpatients for one day, total amount of drug expense for every outpatient and total amount of dispensing fee per year from 1996 to 1998. The medication over 60-days was most increased, cardiovasular diseased and hypertension is most frequent in long-term medication. The average number of outpatient for one day has been increased in every year. Although the long-term medication was increased continuously at much rate, the average waiting time for medication has been shorter by adopting alternative measures(i.e automatic transport system, diverse preliminary preparation). The result of this study indicates that increased number of long-term medication caused increased load of dispensing, increased number of first-coming patients, increased income of the hospital. In the viewpoint of patients, they do not have to visit clinic as often as before, but the necessities of medication counselling for drug adverse reaction and management of noncompliance due to the long-term medication are increased as much as.