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정성환,이형일 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.5
The objective of this work is to study the crack-tip field of plane strain fully plastic crack growth of a single-edge cracked specimen subject to pure extension. The nodal release technique [1] was implemented into an FEM model so that the nodes arranged in the crack path are released. The fracture criterion for the crack growth in the model adopts the loading geometry-based crack-tip opening angle-(CTOA) proposed in the work of Ref. [2]. The crack-tip field from the CTOA-based crack growth was investigated and characterized with a slip line field. It was observed that the backface configuration of the specimen, which evolves with the crack growth, is engaged in the formation of the shear band and, as a result, significantly elevates the triaxiality at the crack-tip during the crack growth.
공공기관 대상 인권실태 조사모델에 대한 제안: 지방공기업을 중심으로
정성환,김종근 한국경영컨설팅학회 2022 경영컨설팅연구 Vol.22 No.2
Human rights, which are the basic rights that humans should naturally possess, have recently become a major issue not only in Korea but also around the world, and human rights in public institutions are also receiving high social attention as they are recognized as a national responsibility issue. The National Human Rights Commission of Korea has continued to make efforts to guarantee and improve human rights as a major national institution related to human rights, and recently, it has actively introduced the human rights impact assessment system. In recent years, the human rights impact assessment system has been actively introduced and managed to induce systematic human rights management of public institutions. However, active management of human rights, which is the core foundation of human rights management, is not being carried out properly.To solve this problem, this study proposes a human rights status survey model suitable for public institutions based on the previously developed human rights status survey model, and collects data from local public enterprises based on the survey model to under the survey model. First, based on the existing human rights survey model developed for the general public, a human rights survey model for organizations such as regional public corporations was proposed. The existing human rights survey model for the general public consists of four categories, and the survey model was redesigned into five categories by simplifying and modifying core surveys for each sector to suit regional public corporations.Next, based on the redesigned survey model, a survey was conducted on human rights management managers of all regional public corporations, and the human rights level of regional public corporations was attempted to be identified using the survey data. It was analyzed that the overall human rights level was good across the five sectors included in the survey model.In particular, sub-elements such as civil, political, social, economic, and cultural rights recognized as basic human rights elements showed relatively high levels, and human rights education and human rights awareness levels were somewhat insufficient. 인간이라면 당연히 소유해야 할 기본적인 권리인 인권이지만 최근 국내뿐만 아니라 세계적으로 주요한 이슈가 되고 있으며, 국가적 책임문제로서 인식됨에 따라 공공기관의 인권 또한 높은 사회적 관심을 받고 있다. 국가인권위원회는 인권과 관련된 주요한 국가기관으로서 인권보장 및 향상을 위해 지속적인 노력을 해왔으며, 최근 들어 인권영향평가제도를 적극적으로 도입하고 관리함으로써 공공기관의 체계적인 인권경영을 유도하고 있다. 그러나 인권경영의 기초적인 토대를 제공할 수 있는 인권실태에 대한 조사가 제대로 이루어지고 있지 못하며, 이러한 문제점을 해결하고자 본 연구에서는 기존에 일반국민들을 대상으로 국가인권위원회가 개발하였던 인권실태 조사모델에 근거하여 공공기관에 적합한 인권실태 조사모델을 제안하고, 조사모델을 근거하여 지방공기업을 대상으로 데이터를 수집하여 전반적인 인권수준을 파악하고자 한다. 먼저 기존에 개발된 인권실태 조사모델에 근거하여 지방공기업과 같은 조직 대상 인권실태 조사모델을 제안하였다. 기존 일반 국민 대상 인권실태 조사모델의 경우 4개 부문으로 구성되어 있으며, 부문별 핵심조사항목을 지방공기업에 적합하도록 단순화하여 수정함으로써 본 연구에서는 5개 부문으로 조사모델을 재설계하였다. 다음으로 재설계된 조사모델에 근거하여 전체 지방공기업 인권경영담당자를 대상으로 설문을 실시하였으며, 설문데이터를 활용하여 지방공기업들의 인권수준을 파악하고자 하였다. 조사모델에 포함된 5개 부문에 걸쳐 전반적으로 양호한 인권수준을 보이는 것으로 분석되었으며, 특히 기본적인 인권요소로서 인식되고 있는 시민·정치·사회·경제·문화적 권리 등의 하위요소들이 상대적으로 높은 수준을 보였으며, 인권교육 및 인권인식수준은 다소 미흡한 것으로 나타났다.
정성환,이영신,Chung, Sung-Hwan,Lee, Young-Shin 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.3
A nuclear spent fuel shipping cask is required by IAEA and domestic regulations to withstand a 9m free drop condition. In this paper, the structural analysis under the 9m side drop condition was performed to understand the dynamic impact behavior and to evaluate the safety of the cask for 7 PWR nuclear spent fuel assemblies. The analysis result was compared with the measured value of the 9m side drop test for the 1/3 scaled-down model and the accuracy of the 3D analysis was confirmed. Analysis in accordance with the diameter of impact limiters for the proto-type cask were performed. Through the analysis, the impact behaviors due to the side drop and the effects dependent on the diameter of impact limiters were grasped. Maximum stress intensities on each part of the cask were respectively calculated by using the stress evaluation program and the structural safety of the cask was finally evaluated in accordance with the regulations.
정성환 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-
A membership function-based image retrieval system with a relevance feedback, is proposed. First, 24-dimentional Gabor features are extracted from the images. Next, the extracted features are reduced to 12-dimentional feature vectors by using KL transform. Then, we use them to generate membership values for the image retrieval. Finally, we apply a relevance feedback to the initial retrieved images from the image retrieval system. In the experiment using the image database of 16 class about 2,400 images, the proposed method shows the better retrieval performance than that of the conventional approach without the relevance feedback.