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정세훈(S. H. Jung),안영준(Y. J. Ahn),안승일(S. I. Ahn),신병록(B. R. Shin) 한국유체기계학회 2007 유체기계 연구개발 발표회 논문집 Vol.- No.-
In general, metal cutting operations involve generation of heat due to friction between the tool and the pieces and due to energy lost deforming the material. This heat needs to be carried away otherwise it creates white spots. To reduce this abnormal heat cutting fluid is used. Cutting fluid also has an important role in the lubrication of the cutting edges of machine tools and the pieces they are shaping, and in sluicing away the resulting swarf. As a cutting fluid, water is a great conductor of heat but is not stable at high temperatures, so to improve stability an emulsion type mixed fluid with water and oil is often used. It is pumped over the cutting site of cutting machines as a state of atomized water droplet coated with oil by using jet flow. In this paper, to develop cutting fluid supplying nozzle to obtain ultra thin oil film for coating water droplet, a numerical analysis of three dimensional mixed fluid jet flows through multi-stage nozzle was carried out by using a finite volume method. Jet flow characteristics such as nozzle exit velocity, development of mixing region, re-entrance and jet intensity were analyzed. Detailed mixing process of air, water and oil in air flow were also investigated. It is easy to understand flow pattern in multi-stage nozzle. Important flow information for advance design of cutting fluid supplying nozzle was drawn.
Bloodborne Pathogen에 대한 임상병리사의 예방행태학적 연구
조경진,이창규,안승일 高麗大學校 倂設 保健大學 保健科學硏究所 1999 보건과학 학술 세미나 Vol.- No.7
에이즈가 널리 전파되면서 임상병리사 들은 혈액유래감염원에 대한 노출에 대하여 보다 커다란 관심을 갖기 시작하였다. 이에 우리는 개인적특성이나 검사실의 체제가 개인의 예방습관이나 보호구착용수준에 얼마만한 영향을 미치는 지를 보기 위한 임상병리사 들의 개인보호를 위한 대책과 행태와 관한 연구를 실시하였는데 보호구착용수준과 예방습관은 낮은 것으로 나타났으며, 예방습관에 영향을 미치는 요인으로는 검사실내 관행과 기본안전관리체제로 나타났다. Occupational exposure to bloodborne pathogens has been the growing concern for the clinical laboratory scientists since the AIDS epidemic was propagated throughout the world. Accordingly we started a survey on the personal protective measures or behaviors of clinical laboratory scientists to ascertain how the socio-economic and institutional characteristics affect to the levels of preventive behaviors or to the levels of PPE compliances. Major factors affecting the protective habits were PPE compliance, institutional customs and basic safety system.
Bloodborne Pathogen에 대한 임상병리사의 예방행태학적
조경진,이창규,안승일 高麗大學校 倂設 保健大學 保健科學硏究所 1998 保健科學論集 Vol.24 No.1
에이즈가 널리 전파되면서 임상병리사 들은 혈액유래감염원에 대한 노출에 대하여 보다 커다란 관심을 갖기 시작하였다. 이에 우리는 개인적특성이나 검사실의 체제가 개인의 예방습관이나 보호구착용수준에 얼마만한 영향을 미치는 지를 보기 위한 임상병리사 들의 개인보호를 위한 대책과 형태와 관한 연구를 실시하였는데 보호구착용수준과 예방습관은 낮은 것으로 나타났으며, 예방습관에 영향을 미치는 요인으로는 검사실내 관행과 기본안전관리체제로 나타났다. Occupational exposure to bloodbome pathogens has been the growing concern for the clinical laboratory scientists since the AIDS epidemic was propagated throughout the world. Accordingly we started a survey on the personal protective behaviors of clinical laboratory scientists to ascertain how the socio-economic and institutional characteristics affect to the levels of preventive behaviors or to the levels of PPE compliances. Major factors affecting the protective habits were PPE compliance, institutional customs and basic safety system.