동측에 발생한 대퇴골 및 경골 골절의 치료

김동헌,신규철,김보현 대한골절학회 1995 대한골절학회지 Vol.8 No.3

The floating knee describes the fail knee joint segment resulting from fractures of the shafts or adjacent metaphyses of the ipsilateral femur and tibia. It usually is associated with major soft tissue damages, open fractures, and other site injuries. The methods of treatment have been controversal .The key point of the treatment is focussed to the early restoration of the knee function. The floating knee in 24 patients were treated by surgical management from March 1988 to December 1994. The results were follows: 1.Average bone union time in femur was 20 weeks and in tibia was 18 weeks. Difference of the result of the treatment between the interlocking nail and Ender nail was not significant. 2. At the last follow up, the excellent and good results were 83% by Karlstrom and Olerud criteria, and the first group using the intrameduallary nail achieved best result. 3. The most common complication was loss of the range of motion of the knee and loss of the range of motion of the knee was 0 to 45 degrees(the average 7 degrees).

고용서비스 개혁을 위한 정책방향과 과제

김동헌 한국고용정보원 2008 고용이슈 Vol.- No.-

Integrated Path Planning and Collision Avoidance for an Omni-directional Mobile Robot

김동헌 한국지능시스템학회 2010 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.10 No.3

This paper presents integrated path planning and collision avoidance for an omni-directional mobile robot. In this scheme, the autonomous mobile robot finds the shortest path by the descendent gradient of a navigation function to reach a goal. In doing so, the robot based on the proposed approach attempts to overcome some of the typical problems that may pose to the conventional robot navigation. In particular, this paper presents a set of analysis for an omni-directional mobile robot to avoid trapped situations for two representative scenarios: 1) U-shaped deep narrow obstacle and 2) narrow passage problem between two obstacles. The proposed navigation scheme eliminates the non-feasible area for the two cases by the help of the descendent gradient of the navigation function and the characteristics of an omni-directional mobile robot. The simulation results show that the proposed navigation scheme can effectively construct a path-planning system in the capability of reaching a goal and avoiding obstacles despite possible trapped situations under uncertain world knowledge.

한국어 핵심어 추출 및 연속 음성 인식을 위한 다목적

김동헌,이상준 한국디지털정책학회 2013 디지털융복합연구 Vol.11 No.1

사염화탄소 및 에탄올 중독간에서 Malotilate(Diisopropyl 1.3-dithiol 2-ylidene malonate)의 보호효과에 관한 전자현미경적 관찰

김동헌,김형춘,송계용 중앙대학교 의과대학 의과학연구소 1987 中央醫大誌 Vol.12 No.3

To observe the protective effects of malotilate(diisopropyl 2-ylidene malonate, MLT) on the hepatic injury induced by carbon tetrachloride(CCl_4)or ethanol,an electron microscopic study was carried out. The 42 rats were used and weighed between 140∼200g divided into acute and chronic expreimental group. Acute groups consist of control, adminstered with malotilate(MLT), CCl_4, CCl_4 with MLT,ethanol, ethanol with MLT, CCl_4 with ethanol, and CCl_4 with MLT with ethanol. Chronic groups were divided into 4 weeks and 8weeks group. Chronic groups(4 weeks) consisted of rats administered for 4 weeks with MLT,CCl_4, CCl_4 with MLT,ethanol, ethanol with MLT, CCl_4 with ethanol, and CCl_4 with MLT with ethanol. Chronic groups(8 weeks) consisted of rats administered for 8 weeks with MLT(4 w), followed by ethanol(4 w),CCl_4(4 w) followed by ethanol(4 w), CCl_4 with MLT(4 w) followed by ethanol with MLT(4 w), and ethanol with MLT(4 w followed by CCl_4 with MLT(4 w). Electron microscopic processes with liver tissue were carried out in each experimental group. The results were as follows: 1 Acute groups A. Moderate to maked vascuolar changes in the hepatocytes in CCl_4 and CCl_4 with ethanol intoxication were improved with decrease of number and size of vacuolar changes by malotilate administration but slightly improved in ethanol with malotilate administration. B. Moderate vascuolar changes were seen in the hepatocytes with the ethanol intoxication and slightly improved with additional malotilate administration. 2. Chronic groups(4 weeks) Moderate to maked vascuolar changes in the hepatocytes in CCl_4 and CCl_4 followed by malotilate with ethanol intoxication for 4 weeks were improved with additional malotilate administration by decrease in number and size of vacuolar change but slightly improved in ethanol intoxication . 3. Chronic groups(8 weeks) A. Mild to moderate increase of collagen fibers and mild vacuolar changes in the liver and hepatocytes in CCl_4 or ethanol administration were improved by decrease of vacuolar changes and collagen fibers followed by additional malotilate administration. B. More increase of vacuolar changes were seen in the hepatocytes with ethanol with MLT followed by CCl_4 with additional MLT than CCl_4 with MLT followed by ethanol with MLT administration. Therefore, malotilate showed remarkable protective effects on carbon tertrachloride intoxication in liver but slight effects on ethanol intoxication. Significantly decreased or even worse effects of malotilate were observed when ethanol was administered for four weeks before CCl_4 intoxication.

고령화사회의 고용정책: OECD 국가들의 고령화 경험과 정책 검토

김동헌 대외경제정책연구원 2005 East Asian Economic Review Vol.9 No.1

In this paper we review the experiences of OECD countries with population aging and their policy responses, and suggest directions and measures of medium and long-term employment policies to cope with population aging in a comprehensive perspective. Specifically, following the policy objective of sustainable economic growth, we systematically classify policy types to cope with population aging and review possibilities and limitations of each policy type, while also considering Korea-specific situations as well as the experiences of other OECD countries. There are two broad types of employment policies to sustain economic growth in an aging society. One is to increase the quantity of labor force and the other is to enhance the quality of labor force. Policies to increase the quantity of labor force include pro-natalist policies, immigration policies, and policies to fully mobilize the labor resources of women and older people. Policies to enhance the quality of labor force include human resource development and flexicurity policies in the labor market. Our review suggests that direct pro-natalist policies seem to be ineffective. Also immigration policies cannot fundamentally solve the problem caused by population aging. Policies to fully mobilize the labor resources of women and older people seem to be the most effective policy. However, labor productivity should be an engine of economic growth in the long run when labor input reaches the limit of its capacity. In conclusion, in the long run, it is most important to enhance the quality of human capital and improve the functioning of the labor market to cope with the challenges of population aging. 본 연구는 OECD 회원국들의 고령화 경험과 정책대응을 체계적으로 검토하고, 포괄적 시각에서 고령화사회에 대비한 중장기적인 고용정책의 대응방향과 정책방안을 제시하였다. 구체적으로 지속적인 경제성장이라는 정책목표에 따라 고령화 대응정책을 체계적으로 유형화하고, 선진국의 경험과 우리나라의 현실을 고려하여 각 정책의 가능성과 한계를 검토하였다. 우선 지속적인 경제성장을 이끌어내기 위한 고용정책은 노동력을 양적으로 확대하는 정책과 질적으로 심화하는 두 가지 정책유형으로 구분된다. 노동력을 양적으로 확대하는 정책에는 출산장려정책, 이민정책, 그리고 여성 및 고령인력의 활성화를 도모하는 정책이 있다. 특히 인구규모 자체를 정책목표로 하는 직접적인 출산장려정책과 이민정책은 인구정책이라고 부른다. 노동력의 질적인 향상을 추구하는 정책에는 인적자본의 축적을 지원하는 능력개발체계의 구축, 노동시장의 유연안정성 제고 등을 들 수 있다. 선진국의 경험에 비추어 직접적인 출산장려정책은 비용에 비해 그 효과가 제한적인 것으로 보인다. 이민정책도 고령화의 문제를 근본적으로 해결해주지는 못한다. 여성과 고령인력의 활성화는 중장기적으로 고령화사회에 대비하는 가장 유력한 전략이며 우리가 가장 역점을 두어야 할 정책분야이다. 그러나 향후 노동력의 양적 투입이 한계에 부딪히게 되는 고령화사회에서는 생산성의 증가가 경제성장을 주도하여야 한다. 결국 장기적으로 인구고령화에 대응하기 위해서는 인적자본의 질을 향상하고 인적자본의 효율적 활용을 가능케 하는 노동시장의 구축이 무엇보다도 중요하다.

직진 주행 차량의 강인 적응제어기 설계

김동헌,김응석,김홍필,양해원 제어로봇시스템학회 2000 제어로봇시스템학회 국내학술대회 논문집 Vol.2000 No.10

적응 제어와 비선형 제어에 관한 CEMTool 툴박스 소개

김동헌,정용식,양해원,서진헌,한태환 제어로봇시스템학회 1999 제어로봇시스템학회 국내학술대회 논문집 Vol.2 No.10

전력 계통 과도상태 안정화를 위한 비선형 적응 백스테핑 제어기 설계

김동헌,김홍필,양해원 제어로봇시스템학회 1999 제어로봇시스템학회 국내학술대회 논문집 Vol.4 No.10

직진 주행 차량의 강인 적응제어기 설계

김동헌,김응석,김홍필,양해원 제어로봇시스템학회 2000 제어로봇시스템학회 국내학술대회 논문집 Vol.1 No.10