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南光鉉 大韓神經精神醫學會 1974 신경정신의학 Vol.13 No.4
The prevalence of mental disorders was studied by means of an intensive census visiting method in a large leprosy colony which is located at Jun-Ra-Nam Do, Go-Heung Goon, So-Rok Do. All the patients in the colony were 4,263 in number and majority of them showed very low socioeconomic state & educational level. This study was performed in June, 1973. & the following results were obtained. 1. 56 cases of schizophrenia, 2 cases of manic depressive psychoses, 22 cases of epilepsy, 14cases of senile psychoses, 6 cases of organic brain syndrome and 4 miscellaneous cases were observed from the total 4,263 patients. Thus the prevalence rate was 1.314% for schizophrenia, 0.047% for manicde pressive psychoses, 0.516% for epilepsy, 0.328% for senile psychoses & the corrected prevalence rate was 1.754%, 0.074%, 0.60% and 2.11%, respectively for the above 4 psychoses. 2. 61% of cases were more than 40 years old. Most cases showed stabilized, regressed mental state and their course is a chronic one. 3. Nearly 90% of cases had more than 5 years of morbid state and in only 4 cases the duration was less than 2 years. 4. Regular drug medication was performed in nearly one third of cases but half of the cases was left alone without any treatment. 5. In more than one half of the cases, physically handicapped states was observed. 6. Only 1/5 of the cases had a marital life with their partner and the remainder lived alone.
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남광현,오위영 한국해양과학기술원 2003 Ocean and Polar Research Vol.25 No.3s
The purpose of this paper is to investigate economic feasibility of creating artificial tidal flats using cost-benefit analyses. We assumed that the cost factors are associated with designing, construction and monitoring, and the benefit factors are associated with fisheries production, habitation, prevention of disasters, water purification, aesthetic value and existence value. First, for analyzing economic feasibility, the scenario suggests that a design can be made in a year, construction can be completed in three years and monitoring must be made for 20 years. Assuming the discount rate of 7.5%, economic feasibility analyses showed that B/C was 2.26 and IRR was 14.50. This study indicated there is economic validity of implementing creation of artificial tidal flat. In addition, we carried out a sensitivity analysis at the change of discount rate and restoration rate. The result of sensitivity analysis clearly showed that economic validity is low when discount rate is over 15%, and changes in restoration rate did not significantly effect on the economic validity.
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남광현,권석재,오위영 한국해양과학기술원 2004 Ocean and Polar Research Vol.26 No.2
The purpose of this paper is to investigate economic feasibility of manganese nodules in the area obtained by Korea (Clarion-Clipperton Fracture Zone). We assumed that the production scale of manganese nodules were 3.0 MT (million ton(dry)) or 1.5 MT, and estimated the capital costs and operating costs by sectors such as exploration, mining, transportation, and metallurgical process. The capital cost and operating cost evaluation reflects the latest technical practices. First, for analyzing economic feasibility, the scenario suggests that the production of 4 metals can be made for 25 years. It is assumed that the discount rate, equity capital, and tax rate are each 8.0%, 50%, and 27%. 3.0 MT of manganese nodule were mined, economic feasibility analyses showed that IRR was 12.8 and pay-back period was 9.2 years, and when 1.5 MT of manganese nodule were mined, economic feasibility analyses showed that IRR was 4.0 and pay-back period was 11.8 years. This study shows that there exists economic feasibility when 3.0 MT of manganese are produced. In addition, we carried out a sensitivity analysis at the change of cobalt price on mining 1.5 MT. The result of sensitivity analysis shows that economic feasibility goes up as increase of cobalt price (50% up).
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南光鉉 서울大學校 保建大學院 1973 公衆保健雜誌 Vol.10 No.1
The prevalence of the major psychoses was studied by means of an intensive census visiting method in a Korean rural village (Wa-chon Myun) which is located 24km from Taegu city. All the residents in the village were 6,846 in number and majority of them(87%) were below the middle school in educational level. The study was performed in September 1972 and the following results were obtained. 1. Twenty-three cases of schizophrenia, 2 cases of manic depressive psychoses, 11 cases of epilepsy and none of general paresis were observed from the total population of 6,846. Thus the prevalence rate was 0.336% for schizophrenia, 0.029% for manic depressive psychoses, 0.16% for epilepsy. 2. The corrected prevalence rate calculated by Weinberg's method was 0.873% (age 16-40) for schizophrenia, 0.1% (age 21-50) for manic depressive psychoses, and 0.264% (age 5-30) for epilepsy. 3. The age of the onset of each disorder was rather coincident with the age range of susceptibility ordinarily adopted by other investigators. 4. In more than two third of patients, they were left alone without any treatment or interest and a hopeless chronic course. 5. Religion does not influence upon the prevalence of psychoses in this study. 6. Marital lives of patients were relatively not disturbed by the psychotic state and the divorce problem is taken rather out of question by the parther in most cases.
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남광현,오위영,Nam, Kwang-Hyun,Oh, Wee-Yeong 한국해양과학기술원 2003 Ocean and Polar Research Vol.25 No.4
The purpose of this paper is to investigate economic feasibility of creating artificial tidal flats using cost-benefit analyses. We assumed that the cost factors are associated with designing, construction and monitoring, and the benefit factors are associated with fisheries production, habitation, prevention of disasters, water purification, aesthetic value and existence value. First, for analyzing economic feasibility, the scenario suggests that a design can be made in a year, construction can be completed in three years and monitoring must be made for 20 years. Assuming the discount rate of 7.5%, economic feasibility analyses showed that B/C was 2.26 and IRR was 14.50. This study indicated there is economic validity of implementing creation of artificial tidal flat. In addition, we carried out a sensitivity analysis at the change of discount rate and restoration rate. The result of sensitivity analysis clearly showed that economic validity is low when discount rate is over 15%, and changes in restoration rate did not significantly effect on the economic validity.
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南光鉉,李大澈 한밭대학교 건설안전기술연구소 2003 건설안전기술논문집 Vol.3 No.-
This study is to determine the formula for river width of small streams in Sabgyo River Basin by looking into hydrological and topographical characteristic factors. This study also is to examine the feasibility of the formula for the actual practice comparing with the existing formulas. The design flood discharge, drainage area and stream length for the small streams in the Sabgyo River basin are shown the relationships as L=3.116+0,130*A and Q=623.087+192.648*A. The formulas for the design-width of small streams in Sabgyo River basin are suggested, on the basis of the flood discharge, drainage area, and bed slope, as B_(Q)=20.723+0.005(Q/√(I)) and B_(A)=30.747+0.035(A/√(I)), respectively. The newly set-up-formula in this study is more accurate and applicable in deciding the flood discharge and drainage than the existing formulas. Therefore, I argue that this equation can be applied to determine the design-width of small streams in fluvial river basin.
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