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김영식,Kim, Yeong-Sik 한국대학교육협의회 2006 大學敎育 Vol.142 No.-
정부주도적인 획일정책이나 지시명령적 관여 등 80년대의 정치.사회적 상황이나 시대적 배경이 대교협 발족의 근본적 동기가 되었다고 본다. 대학들은 근원적으로 그 자체가 하나의 자치기구이며, 학문공동체이며, 자기통제기관이다. 이러한 대학의 속성을 살리기 위해 정부와 대학 간의 협의조정기구로서 협의체의 필요성을 깨닫고, 우리나라 대학의 자율성 신장을 위해 하나의 이정표를 세웠다는 점에서 대교협의 큰 의의가 있다고 평가된다.
전도성 금속 피복재의 전기전도도에 의한 전자파 차폐효과 분석
김영식,최익권,김성수,Kim, Yeong-Sik,Choe, Ik-Gwon,Kim, Seong-Su 한국재료학회 1999 한국재료학회지 Vol.9 No.9
전자파 차폐특성 측정방법의 일환으로 매질의 전기전도도로부터 차폐효과를 정성적 수준에서 예측하는 연구를 수행하였다. 사용된 시편은 전도성 금속 (Cu, Ni)이 피복된 망사형 차폐재로 두께는 0.1 mm 정도이고, 전기전도도는 6.4$\times$10~2.4$\times$10(sup)5 mhos/m 범위 값을 가졌다. 물질상수와 시편의 두께로 표시되는 반사손실 및 흡수손실의 이론식을 도출하고 상기 시편에 대해 차폐효과를 계산하였다. 전도성 피복재의 경우 주된 차폐기구는 반사손실임을 밝힐 수 있었으며, 전기전도도가 증가함에 따라 차폐효과는 현저히 증가함을 알 수 있었다. 이들 이론치를 임피던스 실측치로부터 계산된 반사손실과 비교한 결과 10 dB 이내의 오차를 보임으로써 제안한 분석방법의 타당성을 입증하였다. As an alternative evaluation method of electromagnetic shielding properties, the material parameters are considered in determining the qualitative value of shielding effectiveness. The specimens are metallized nylon fabrics with the thickness of about 0.1 mm and the electrical conductivities in the range from 6.4$\times$10~2.4$\times$10(sup)5 mhos/m. On the basis of shielding theory, the shielding effectiveness (which is a sum of reflection loss and absorption loss) has been determined from the material parameters of the barrier sheets. For the conductive fabrics, the dominant shield mechanism is predicted to be reflection loss, which shows an increasing function of electrical conductivity. Comparing these theoretical value with the directly measured surface impedances, the error range is found to be within 10 dB, which demonstrates that the proposed material-parameters method can be a convenient way to determine the electromagnetic shielding properties.
김영식,Kim, Yeong-Sik 한국건강관리협회 2004 한국건강관리협회지 Vol.2 No.2
Lifetime Health Maintenance Program(LHMP) or Koreans is the Korean guide to clinical preventive services which include screening for chronic diseases, counseling and immunization. The Korean Task Force on the LHMP vigorously reviews evidence for interventions to prevent over 50 different illnesses and conditions which are important in Korea. The problems addressed in this program are common ones seen every day by primary care physicians in Korea: cardiovascular, infectious diseases, gastrointestinal and endocrine diseases, cancers, alcohol and smoking, and many others. Primary care clinicians have a key role in screening for many of these problems and imunizing against others Of equal importance, however, is the clinician's role in counseling patients to change unhealthful behaviors related to diet, smoking, exercise, injuries, and sexually transmitted diseases The recommendations are grouped by age, sex, and other risk factors.
고탄소강의 연속 건식 신선 공정에서 선재의 온도 예측 기법 개발
김영식,김동환,김병민,김민안,박용민,Kim, Yeong-Sik,Kim, Dong-Hwan,Kim, Byeong-Min,Kim, Min-An,Park, Yong-Min 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.2
Wire drawing process of the high carbon steel with a high speed is usually conducted at room temperature using a number of passes or reductions through consequently located dies. In multi-stage drawing process, temperature rise in each pass affects the mechanical properties of final product such as bend, twist and tensile strength. Also, this temperature rise during the deformation is the reason that the wire in drawing process is broken by the embrittlement due to rapid strain aging effect. This paper presents the estimation of the wire temperature for the multi-stage wire drawing process. Using the proposed calculation method of wire temperature, temperature rise at deformation zone as well as temperature drop in block considering the heat transfer between the block and wire were calculated. As these calculated wire temperatures were applied to the real industrial fields, it was known that the calculated results were in a good agreement with the measured wire temperature.