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이온주입에 의한 오일씰 고무의 마찰계수 향상에 관한 연구
김경균,김정석,강명창 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
In the last years there has been a growing interest concerning the application of rubber in machinery, electronics and biotechnology. Several applications of the oil seal rubber can be further extended by modification of the physical and chemical properties of the rubbers. Ion implantation provides a unique way to modify the mechanical properties of oil seal rubber by depositing the energy of ions in the material on the atomic scale. In this paper, we studied the relation among the coefficient of friction and contact angle and abrasion resistance using the high current ion implantation technology.
一部 都市地域 職業女性의 傷病과 醫療利用에 關한 調査硏究 : -製藥會社 女從業員을 中心으로-
金慶均 서울大學校 保健大學院 1972 公衆保健雜誌 Vol.9 No.1
A survey was conducted on 1539 working girls, for 6 months, from March 1, 1971 to Aguest 31, 1971, for th purpose of understanding their current status of morbidity and utilzation of medical care. The summarized results ate as follows: Ⅱ. Socio-medical characteristcs of the surveyed people: 1) The composition of population surveyed by age: 52.5% of the surveyed people were 17 to 20 of age. 2) The majority of the surueyed people (66.4%) were middle school graduates in education. Ⅱ. Sickness status and utiliation of medical care: 1) There had ocurred 1539 cases during the surveyed period. and among them 46% were prevailed spring, 54% were in summer. It showed that summer had higher prevalence, 205.4 cases out of 1,000 per-sons, than that of spring. 175.4 case. 2) It was revealed in prevalence rate that the diseases of respriatory system ranked the highest, 133.9 cases out of 1,000 persons, the diseases of digestive system were next (74.1 cases), the third were allergic endocrine system, metabolic and nutritional diseases (37.6 cases), the fourth were the diseases of the nervous system and sense organe (32.5 cases), the fifth were the disease of skin cellular tissue (33.8 cases), etc. 3) Age-specific morbidity: It showed that 25 to 28 age were 395.0 cases out of 1,000 persons, and under 17 of age were 394.4 cases. 4) The morbid status decreased inversely with the higher level of education. The prevalence rate of the primary school gra염tes were 418.2 cases out of 1,000 persons but that of high school graduates were 329.4 cases. 5) Morbid status per capita during the surveyed: an average man got sick 0.38 time during the surveyed preiod, and the continuing sick days per capita were 4.3 days: The morbid period 11.4 days: the bed rest period 0.3 days. 6) As the utilization of medical care, the majority of the population (63.2%) consulted the pharmacy in case of sickess, only 16.7% of them made a visit to clinic, and 9.6% of them visited herb-medicine. Whereas the utilization of health center was lawest, the strentherning of medical care activities in the health center is urgently required. 7) Medical expenses during the surveyed amounted to 6205.1 Won in clinic per case and 788.9 Won in pharmacy. The expenses per capita during the surveyed reached 623.8 Won.