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임환,심도준,김윤재,김영진,Lim, Hwan,Shim, Do-Jun,Kim, Yun-Jae,Kim, Young-Jin 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.7
In this paper, a unified methodology based on the local stress concept to estimate residual strength of locally thinned pipes. An underlying idea of the proposed methodology is that the local stress in the minimum section for locally thinned pipe is related to the reference stress, popularly used in creep problems. Then the problem remains how to define the reference stress, that is the reference load. Extensive three-dimensional finite element (FE) analyses were performed to simulate full-scale pipe tests conducted for various shapes of wall thinned area under internal pressure and bending moment. Based on these FE results, the reference load is proposed, which is independent of materials. A natural outcome of this method is the maximum load capacity. By comparing with existing test results, it is shown that the reference stress is related to the fracture stress, which in turn can be posed as the fracture criterion of locally thinned pipes. The proposed method is powerful as it can be easily generalised to more complex problems, such as pipe bends and tee-joints.
임환(Hwan Lim),고두균(Doo Kyun Ko),안병진(Byoung Jin Ahn) 한국품질경영학회 2001 품질혁신 Vol.2 No.2
지금까지 6시그마 경영과 연계한 경영혁신활동은 주로 제조업을 중심으로 이루어져 왔으며 연구기관의 경영혁신활동은 제한적으로 운영되어 추진사례를 찾기 어려웠다. 이 논문에서는 직접적인 연구활동과 연구부문의 효율적 지원을 위한 경영혁신활동을 수행한 사례로서 한국과학기술연구원(KIST)의 경우를 소개하고자 한다. 이 사례는 사무간접부문에서의 혁신활동과도 차이가 있다. 또한 KIST에서의 그 동안의 성과와 앞으로의 추진방향에 대하여도 살펴보고자 한다.
임환(Hwan Lim),손명호(Myung Ho Sohn) 한국IT서비스학회 2010 한국IT서비스학회지 Vol.9 No.4
Most organizations adopt their own performance measurement systems. Those organizations select performance measures to meet their goals. Organizations can give only limited description of what performance measures are. Kaplan and Norton suggest that the Balanced Scorecard (BSC) to complement the conventional performance measures. The BSC can provide management system with a comprehensive strategic vision and integrates non-financial measures with financial measures. The BSC is widely used for measuring corporate performance. This paper investigates how the BSC-based performance measures can be applied to Learning City. The Learning City's performance measures and strategy map on the basis of the BSC are suggested in this research. This paper adopt the AR(assurance region)-DEA model which could limit the range of weight on performance measures to prevent each viewpoint of BSC from having unlimited elasticity. The proposed model is based on CCR model including a property of unit invariance to use the data without normalization process.
특허 인용도 지수를 활용한 공공기관 특허관리체계 개선에 관한 연구 - K연구원의 사례를 중심으로
임환(Hwan Lim),임호순(Hosun Rhim),손명호(Myung Ho Sohn) 한국IT서비스학회 2008 한국IT서비스학회지 Vol.7 No.3
Many problems making the use and management of patents arduous is caused by the difficulty in knowing the proper value. This study has suggests the methods to evaluate the value of patents by using a quantitative assessment scale as an alternative or complementary measure instead of the existing subjective evaluation tools. This study is to find a method to determine the capability and level of research and establish the scheme of use and management of patents by using the citation index as a quantitative assessment measure. The data used in this paper has been obtained from a public-sector R&D institute, the K-Institute in Korea.