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신정현(J. H. Shin),이윤식(Y.S. Lee),류상훈(S. H. Ryu),성희준(H. J. Sung) 한국레이저가공학회 2008 한국레이저가공학회지 Vol.11 No.3
Hybrid laser welding technology is a good process to reduce a thermal distortion and increase the productivity. However, it requires a high investment and a massive modification of the fabrication line such as a gantry system, milling machine for the edge preparation, high power laser system and weld machine. Therefore the development of an economical laser welding system is a crucial point to apply this system in shipbuilding yard. In this study, a portable hybrid laser welding carriage was developed for I-butt joint without edge milling. It is expected that the carriage type system could reduce investment cost.
신정현(J. H. Shin),이윤식(Y. S. Lee),류상훈(S. H. Ryu),성희준(H. J. Sung) 한국레이저가공학회 2008 한국레이저가공학회 학술대회 논문집 Vol.2008 No.-
Hybrid laser welding technology is a good process to reduce a thermal distortion and increase the productivity. However, it requires a high investment and a massive modification of the fabrication line such as a gantry system, milling machine for the edge preparation, high power laser system and weld machine. Therefore the development of an economical laser welding system is a crucial point to apply this system in shipbuilding yard. In this study, a portable hybrid laser welding carriage was developed for I-butt joint without edge milling. It is expected that the carriage type system could reduce investment cost.
의과대학 학생의료 봉사를 위한 농촌지역 사회진단 : 충청북도 진천군 백곡면 Baek-Gok Myun, Jin-Cheon Gun, Chung-Cheong-Buk Do
강지욱,조지희,황희성,김금미,백혜승,신정현 이화여자대학교 의과대학 1986 梨花醫學誌 Vol.- No.18
A Study on environmental sanitation and health status was made so as to be able to plan for effective medical student health survice in a Korean rural community Baek-Gok Myun. For the study, total 263 households of three Ries out of nine Ries wer selected and an interview using family record and questionnair was carried out for each household by 10 medical students from July, 22, to 26, 1985. And following results were obtained: 1) Population of three Ries was 1,234; male, 645 and female, 589. Sex ratio: 109.5 2) Family size : The average household consisted of 4.5 persons. 3) Dependency rate : 68.3% Environmental sanitation: 1) The source of drinking water. water distribution system 60.1% well pump 36.5% spring water 3.4% 2) The kind of using privy proved-privy 83.3% pit-privy 15.6% openair privy 1.1% 3) Distance between well and using privy more than 10m 46.7% 5-9m 36.2% less than 5m 17.1% Status of chronic illness: 1) Morbidity rate: 120.7 per 1,000 population 2) Usual causes of illness Arthritis 16.0% Neuralgia 9.4% Notalgia 8.7% Maternal & Child Health: 1) Prenatal care rate: 27.0% 2) Average number of pregnancy : 3.7±1.9times 3) Abortion rate : 26.0% 4) Delivery rate in medical facilities : 28.0% 5) Vaccination rate DPT 87.5% Poliomyelitis 81.9% BCG 80.6% Measles 70.8% 6) Planned weaning rate : 13.0% 7) Child death experience rate : 6.0% Family planning 1) Family planning practice rate : 73.0% 2) Used methods Sterilization 53.0% (Male 4.0%, Female 49.0%) I.U.D 14.0% Oral pill 5.0% Others 10.0%