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김흥규,오수익,Kim, Heung-Gyu,O, Su-Ik 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.12
The objective of this study is to evaluate heat transfer coefficient distribution during heat treatment by inverse analysis. As a first procedure, the inverse heat transfer formulation by using two dimensional finite element method has been developed. The formulation can handlematerial nonlinearity and allow arbitrary placement and number of sensors. The formulation was verified through application to simulated exact and inexact measurements.
김흥규,양영수,배강열,Kim, Heung-Kyu,Yang, Young-Soo,Bae, Kang-Yul 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.2
Manhole cover, which is usually made of grey cast iron and consists of frame and cover, should have enough strength to support the heavy traffic load. The manhole cover made of cast iron has heavy weight to handle manually and is vulnerable to impact force with its brittle characteristics. Moreover, its production process of casting has been regulated in terms of environmental pollution. In this study, steel manhole cover is proposed to substitute the cast cover with a series of structural analyses to confirm its strength to support the test load for manhole cover. The cover of the proposed steel manhole cover is made of thin circular pate and stiffeners below the plate. Rectangular columns and hollow circular plate were selected for the shape of the stiffener. In order to give enough strength for the cover to behave within elastic range in the loading, strengthening structures of the cover were varied with increasing the number and the size of the stiffeners. The results of the analyses revealed that when both the hollow circular stiffener and cross stiffeners were additionally applied at the same time to the steel cover with longitudinal stiffeners, the maximum stress level in the cover could be reduced to that level presented in the cast cover.
PSM과 DID의 순차적 적용을 통한 정부지원사업의 효과성 분석
김흥규,Kim, Heung-Kyu 한국경영정보학회 2013 Information systems review Vol.15 No.3
정부지원사업을 평가할 때 단지 수혜집단의 수혜 전 후의 성과를 단순 비교하거나, 혹은 수혜집단과 비수혜집단의 수혜 전 후의 성과차이를 비교하는 경향이 있다. 한편, 이러한 성과평가의 방법은 수혜대상 주변의 환경변화나 수혜집단과 비수혜집단 간의 차이로 인한 영향을 통제하지 못하는 단점이 있다. 따라서 본 연구에서는 이러한 단점을 극복하는 한 가지 방법으로 PSM과 DID의 순차적 적용을 제안한다. 제안한 방법론을 클린사업장 조성 지원 사업의 성과평가에 적용한 결과 자기선택편의를 제거할 수 있어 보다 정교한 성과평가가 가능하였다. When evaluating effectiveness of a government's supporting program, there is a tendency to simply compare the performances of the treated before and after the program or to compare the differences in the performances of the treated and untreated before-after the program. However, these ways of evaluating effectiveness have problems because they can't account for environmental changes affecting the treated or effects coming from the differences between the treated and the untreated. Therefore, in this paper, sequential applications of PSM and DID are suggested as a means to overcome those problems. It turns out that this approach enables us to eliminate self-selection bias and thus better evaluate effectiveness.
김흥규 ( Kim Heung-kyu ),김홍섭 ( Kim Hong-seob ) 인하대학교 교육연구소 2005 교육문화연구 Vol.11 No.-
The objectives of this study are to find out 1) the overall stress level of the industrial employees, 2) the differences of demographic variables(sex, age, religion, birth order, social level, income, residence style, home ownership and home scale) of the industrial employees, 3) the higher stress item among the stress cases of the industrial employees, 4) the differences in industrial employees stress coping methods according to sex, age, religion, birth order, social level, income, residence style, home ownership and home scale, 5) the differences on the overall stress situations of the industrial employees. Participants were 733 industrial employees between 20's and 50's(540 males and 193 females). The data were collected by the following tools: Social Re-adaptive Diagnostic Scale(42 items) standardized by Holmes and Rahe, Diagnostic Scale of Stress Situations developed by Kim Heung-Gyu(1994). The collected data were analyzed frequency analysis, t-test, and one-way ANOVA by SPSS 10.0. The findings of this study were as follows: First, 92.1% of the industrial employees showed no stress related problem, 7.9% of the employees showed serious level of stress conditions. Second, according to demographic analysis only sex, age, home ownership and home scale were found the differences of stress. Third, the most stressful factor during one year for the industrial employees was in the working condition. Fourth, Males have more confidence in coping with stress compares to females. Finally, the study shows that 40.8%(299 people) of the employees, the larger portion in the study, can in fact control their stress.