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김도한,Kim, Do-Han 한국과학기술단체총연합회 1993 과학과 기술 Vol.26 No.6
국제정세의 변화와 오랜 통일에의 염원에 따라 남북한 상호간에 많은 교류가 예상되고 있다. 그러나 해방 후 분단 반세기 동안 남한과 북한은 전혀 교류가 없는 상태에서 서로 다른 길을 걸어왔기 때문에 모든 분야에서 상당한 이질감을 느낄 수 밖에 없다. 수학의 경우에도 분야에 따른 연구상황은 물론, 용어면에서도 많은 차이를 보인다. 우리가 별 노력없이 일본식 한자용어와 영어용어를 그대로 수용하고 있는 경향인데 반하여 북한에서는 한글화 작업에 많은 노력을 쏟아와 대부분의 수학용어들이 우리 고유의 한글로 정착되어 있다. 현재 우리의 감각에는 생소하고 어색한 단어들도 많지만 북한의 좋은 한글용어를 보완, 수정하는 등 중요 자료로 받아들여 우리의 수학용어를 체계화시킴으로써 통일된 앞날의 우리 수학발전에 기초로 삼아야 할 것이다.
Nd:YAG 레이저를 이용한 알루미늄도금강판의 용접성(II) - 용접부내 알루미늄의 거동 -
김종도,이정한,김기철,Kim, Jong-Do,Lee, Jung-Han,Kim, Ki-Chol 대한용접접합학회 2007 대한용접·접합학회지 Vol.25 No.4
Aluminized steel sheet is a material with excellent heat resistance, thermal reflection and corrosion resistance. It has wide applications, owing to its low cost and excellent performance, in the petrochemical industry, electric power and other energy conversion systems, etc and has attracted the attention of many investigators. But the welding of aluminized steel sheet has a problem of decreasing tensile-shear strength, caused by mixed Al in the weld. This study investigated behavior of Al and its structural properties to resolve this problem. Several analysis equipment(SEM, EDX, EPMA) were used to investigate Al element in the weld. Also microhardness tester and TEM equipment were used to find the intermetallic compound. As a result of this study, Al-rich zones existed in the weld and Fe-Al intermetallic compounds were found in these zones. At the same time, the weldability of aluminized stainless steel sheet was investigated and compared with that of aluminized steel sheet. Although there is a difference between the base metal of the low carbon steel and stainless steel, it is interpreted that a behavior of Al element in the weld is similar.
증례 : 신장 ; 지방흡인술 시술과 관련된 횡문근융해증에 의한 급성 신손상 1예
김채림 ( Chae Rim Kim ),홍문기 ( Moon Ki Hong ),남우진 ( Woo Jin Nam ),한민지 ( Min Jee Han ),김수현 ( Su Hyun Kim ),김도형 ( Do Hyoung Kim ) 대한내과학회 2015 대한내과학회지 Vol.88 No.1
지방흡인술 시술은 점차 우리나라에서도 그 빈도가 증가하고 있는 수술로, 수술 시 주의가 필요하다. 횡문근융해증의 조기 징후를 보일 때에는 빠른 뇨 검사와 혈액 검사를 통하여 횡문근융해증을 진단하고 충분한 수액 공급 및 이뇨제투여가 필요하다. 또한 수술 후에도 주의 깊은 관찰을 해야할 것이다. Rhabdomyolysis is defined as a skeletal muscle injury with release of muscle cell constituents into the plasma. It can occur invarious diseases and conditions, including muscle strain, drug or alcohol abuse, connective tissue disease, excess exercise, or followingsurgery. Only one case of rhabdomyolysis has ever been associated with liposuction in Korea. We experienced a case ofrhabdomyolysis that developed after liposuction surgery. The patient was a 39-year-old woman presenting with abdominal pain1 day after liposuction. She was treated with general supportive care, including massive hydration and absolute bed rest. Renal replacementtherapy was performed due to pulmonary edema. She, finally, recovered fully. Acute kidney injury caused by liposuction-induced rhabdomyolysis is a rare disease. Therefore, we present this case with a review of the literature.
Nd:YAG 펄스 레이저를 이용한 AZ31B 마그네슘 합금의 겹치기 용접에서 발생하는 용접결함과 그 대책에 대한 연구
김종도,이정한,김영식,Kim, Jong-Do,Lee, Jung-Han,Kim, Young-Sik 대한용접접합학회 2011 대한용접·접합학회지 Vol.29 No.3
With a tendency for the application of thin magnesium alloy plates in portable electronic equipment such as cell phone and notebook PC, there is a requirement to develop a welding technology for the lap welding of these thin magnesium alloy. This paper presents the single pulsed laser welding of AZ31B magnesium alloy. The effects of fiber types and parameters such as peak power and pulse width on laser weldability were investigated. The results show that weld defects, especially solidification crack, were always generated in the weld. These defects couldn't be controlled by the simple square pulse, but could be improved through the application of variable pulse. It is because that variable pulse has effect of solidification delay by dropping peak power gradually.
김해도,이광야,박종윤,한국헌,임형창,Kim, Hae Do,Lee, Kwang Ya,Park, Jong Yoon,Han, Guk Heon,Lim, Heung Chang 한국관개배수위원회 2012 한국관개배수논문집 Vol.19 No.1
The aim of this study was to analyze the operation plan for heightened agricultural reservoir, in terms of water supply to downstream paddy fields and instreams. Operation of agricultural reservoir before the heightened reservoir project is easy to manage because of its single purpose, which is irrigation water supply. However, after proceeding the heightened project, there is needed to be set the operation rule because of its multiple purpose, which is water for irrigation and supply to the stream. In this paper, propose the method of design the criteria of supply to the stream and operation rule curve for the heightened reservoir. According to simulation results by proposed operating rule for the Gumsa reservoir, the yearly amount of water supply to the stream can be 2,588 thousand $m^3$, 3 times of the heightened space (2,588 thousand $m^3$).
저탄소강의 알루미늄코팅조건에 따른 Nd:YAG 레이저 용접특성
김종도(Jong-Do Kim),이정한(Jung-Han Lee),김숙환(Sook-Hwan Kim),김기철(Ki-Chol Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Aluminized steel sheet that Al coated on low carbon steel has a excellent heat resistance, thermal reflection and corrosion resistance. It has applied to fuel tank, automotive exhaust systems, etc. Laser weldability of the aluminized steel for the full penetration welding will be described in this paper. We focused on the effect of Al coating conditions on weld strength. For these objectives, aluminized steel sheets that has various thickness and coating weight were prepared for laser welding. And then, tensile-shear and hardness test were carried out. At that same time, Al content mixed in weld after laser welding was evaluated and investigated a correlation between the mixed Al and mechanical properties. Besides, as removing partially coating layer, weldability has been investigated according to position of coating layer. As a result of this study, as increasing Al content in weld, tensile-shear strength was decreased. Also it was identified that Al of coating layer caused grain growth.