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      • 다중 침대평판전극에서 코로나 방전을 이용한 질소산화물(NOx) 제거

        朴在潤 慶南大學校 附設 工業技術硏究所 1996 硏究論文集 Vol.14 No.1

        본 논문에서는 다중 침대평판구조의 반응기에서 코로나 방전을 이용하여 전원의 종류, 침전극의 수, 유량, 농도 및 습도의 변화에 따라 디젤엔진으로부터 방출되는 NOx의 모의 셈풀가스를 사용하여 NOx의 제거특성을 측정하고 분석하였다. AC 및 구형파 전압은 11[kV]이하의 저전압영역에서 제거특성이 약간 우수하나 그 이상의 전압영역에서는 DC전압의 경우가 제거특성이 우수하였다. 침전극의 수가 증가할수록 NOx의 제거특성이 우수하였으며, 유량이 증가하면 제거특성이 약간 감소되었다. 그리고 초기농도에 따라서는 큰 영향이 없었으나 습도가 증가하면 제거특성은 크게 개선되어 습도가 90[%]에서 91[%]의 제거율을 나타내었다. In this paper, NOx exhausted from diesel engine are decomposed by the corona discharge of DC, AC and square wave in multipoint-plane reactor and removal characteristics are measured as power sources, needle number, flow rate, concentration and humidity. The square wave is generated by rotary spark gap(R.S.G.). The consumption powers are same until 11[kV], but at more than 11[kV], the consumption power of DC is larger than those of AC and square wave. When the number of needle is increased, the removal of NOx is also increased and the removal characteristics of NOx is the best of all at DC of 14[kV].The removal of NOx is decreased as the flow rate of sample gas is increased, but is not affected by the concentration of NOx. When the humidity is increased, the removal of NOx is increased, that is 91[%] at the humidity of 90[%]

      • 구속 콘크리트의 强度와 變形 特性

        朴在云,文龍基 관동대학교 2000 關大論文集 Vol.28 No.2

        Concrete is either confined by adjacent structural members or through lateral rainforcement in form of hoops or stirrups. A general agreements is found among the researchers about the beneficial effects of confinement and information on spirally or spirally or hoop confined concrete is scare. Moreover. no information is available eoncerning the effects of confinement onhigh strength concrete. This paper is devoted to accumulating experimental information on hoop confined concrete with normal weight concrete. compressive strength. spacing and yield strength of the spiral wire etc. The experimental program for confined concrete undertaken in this investigation is described and test results are presented.

      • 醫療保險組合의 事業場別 財政收支 分析

        朴在元 대구보건대학 1988 대구보건대학 論文集 Vol.11 No.-

        The condition of benefits to contributions on 635 establishments (1985) and 715 ones (1986) that belonged to the medical insurance society in the first area of Taegu was grasped and the results that analyzed factors that were able to have influences on the condition of benefits to contributions by establishment are summarized as follows. The number of the insured by establishment (1985) was 63, but 59 people (1986). The average standard monthly wage of the medical insurance societies studied was 283,600 won (1985), and 296,400won (1986). The average dependancy ratio was 2.51 (1985) and 2.45 (1986). The frequency of utilization was 3.41 (1985) and 2.95 (1986). The rate of benefits to contributions was 96.9 %(1985) and 74.3 % (1986). The industry that was the lowest in the rate of benefits to contributions was manufacture of chemicals, petroleum, coal, rubber and plastic products in 1985 and 1986. The industry that was the highest in the rate of benefits to contribuitons was sanitary and similar services(l985) and landscape gardening (1986). But in all types of industry, the frequency of utilization in 1986 was lower than that in 1986 was lower than that in 1985. The establishment that exceeded 100 % of the rate of benefits to contributions was 46.0 % (1985), but decreased t o 20.5 % (1986). The proportion of the establishments that had a deficit of benefits to contributions in all types of industry decreased. The smaller the scale of establishments was, the higher was the average rate of benefits to contributions, and the specific gravity of establishments that had a deficit of benefits to contributions showed a tendency that was growing higher. The smaller the standard monthly wage was, the higher the frequency of utilization and the dependancy ratio were and the larger the legal benefits per case was, the higher was the rate of benefits to contributions and the number of the establishments that had a deficit of benefits to contritutions showed a tendency that war growing more. In the result of logarithmetic regression analysis about the rate of benefits to contributions, the legal benefits per case (1985) was 1.0032 and 0.9498 (1986). They both showed the highest elasticity. The freqency of utilization, which showed the lowest elasticity, was 0.3009 (1985) and 0.5852 (1986). The standard monthly wage and the number of the insured to the rate of benefits to contributions showed minus effect. And in the establishments that had a larger scale and gave the better wage to the workers, it showed that the condition of benefits to contributions was growing better. In view of the above contents, general measures to reduce unnecessary medical utilization should be devised to stabilize the finance of the insurance. Medical insurance societies, in consideration of the effect of dispersion on dangers among establishments, should establish and reconstitute small-scale establishments and large-scale ones with a harmonious ararrangement. In the establishments that produce continuous deficits during the fixed financial year, the measures should be devised that make many items to the contribution rate, and that contribute insurance contribuitons according to the number of the dependants. And it is desirable that copayment that has been practiced since 1986 should be continuously practiced.

      • 섬유 산업체 근로자의 신체자각증상 호소율

        朴在元,辛斗萬 대구보건대학 1992 대구보건대학 論文集 Vol.13 No.-

        This Research was carried out on 870 laborers who are engaged in the fiber industries in Daegu, Kyung-book in order to grasp laborer's physical perception symptoms and its variable which influence it and planning and accomplishing effectively the health management business of industrial spot, during a month from June 1 to 30 in 1991 which is applied to the results of this study can be summarzed as follows. 1. Over 20% of applied subjects are divided according to the frequency of feeling always so (over theree times a week), often so(one or two times a week) and the complaint rate that eyes feel tired is 44.0% and shows the highest complaint rate. Female laborers according to sex, between 10 and 19 ages according to age, single and married according to married state, bording laborers according to the state of location, generally shows high rate complaint. 2. Laborers in dept of spinning shows the exhaustion of eyes(54.4%) and Laborers in dept. Of processing shows that they have serious headache(29.5%) and laborers in textile dept. Have ache on the shoulder(43.4%) and it significantly shows that shfters feel the ache of eyes(49.7%) and night workers feel ache on empty stomach. 3. In the reaction distribution of uneasiness, female(12.9%) is higher compared with men(3.0%). According to age 13.2% of between 10 and 19(12.9%) of between 20 and 29(12.95) appeared. According to educated level, 11.5% of senior high school graduates, 12.4% of single according to marriage state, 11.0% of four year engagement carrieer laborers. According to the engaged year, 13.5% of boarding house according to boarding stated, 12.3% of laborers not paying for living shows independently high complaint degree. 4. The using rate of drugstore is highest among health institution. 5. The complaint rate of the abnormal symptom of female menstration, according to age, that the irregularity of the age between 10-19 is 60.7%, the ache of the age between 20 and 29 is 51.7%, and the hypersensitiveness of the hyper sensitiveness of the age between 30-39 is 45.8%, Thus is indicates high rate of complaint. According to the state of marriage, singles show the 100% of irregularity, the 50% ache, according to the years engaged in the part of the engaged years, under one year is 54.0%, in the ache, the year between 5-9 is 54.7% in the part of hypersensitive, the 41.7% of between 5 and 9 years engaged is highest, according to the hours engaged night workers show 74.1% in all three and highest complaing rate. 6. In the comprehension degree about the knowledge of communicable disease, in the area of superior marks, man shows the complaint rate of 11.8% and female shows 4.5% according to sexs, the age of between 40 and 49 in 14.1% according to the age, 25.0% of college graduate according to scholarly attainment and the married shows 9.6% according to the state of marriage. According to the conclusion of this study, it is thought that the abundent investment must be carried out on the level of workers welfare advancement through the amelioration of comsciousness of working environment towards employer along with health education needed for the health of workes and on the nation level, the policy and support for the workers health must be strengthened.

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