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용접조건에 따른 고장력강 용접부의 기계적 성질 및 수소유기 응력부식귀열 (應力腐食龜裂) 저항성 변화
박동환,권해욱,백광기,서창교 대한금속재료학회(대한금속학회) 1988 대한금속·재료학회지 Vol.26 No.10
The effect of welding condition on mechanical properties and Hydrogen Induced Stress Corrosion Cracking (HISCC) resistance of Heat Affected Zone (HAZ) in high strength steel weldment was studied. Multi-pass Submerged Arc Welding of A5l6 Grade 70 steel plate with different heat input of 30, 40, 50 KJ/㎝ were carried out, which were followed by Post Weld Heat Treatment (PWHT) for 2 hrs at 630 ℃. As the heat input during welding was increased, the impact energy and hardness at HAZ were decreased, on the other hand, the hardness was decreased and both the impact energy and the resistance of HISCC were increased. With proper selection of welding heat input and PWHT, better results of the resistance of HISCC and Charpy V notch impact energy of HAZ can be obtained.
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초등교사가 장애학생 체육활동을 담당하는 체육전담교사로서 살아가기
박동환 한국초등체육학회 2019 한국초등체육학회지 Vol.25 No.2
The purpose of this study is, as an elementary school teacher in charge of physical activity for student with disabilities students, describing experience of teaching them concretely in the context of social structure, through paralytic students’ discrimination experience in an elementary school, criticizing the adverse function of socially macro structure and education culture of an elementary school being rooted in centering on general students, to seek an educational meaning of improving physical activity for student with disabilities students. For this, crtical ethnography was utilized as a methodology. During fieldworks, data were collected through participation observations, field notes, semi-structured one on one interviews, retrospectively recorded conversations, personal narratives. Data were analyzed through the contents analysis and structural analysis method(Elis, 204) and represented through the creative analytic processes ethnography. The results are like the following. The non-equalities, being experienced by paralytic students in an elementary school, are as the following. First, non-interest, discrimination, second, irresponsibility, ruling, third, frequency and obeisance, are appeared, And I discussed these based on the law of prohibiting any discrimination against the paralytic students. This study is, as an elementary school teacher, the education of paralytic students should be not only to adapt corresponding expectancy of school members, but also to improve the possibility of growth for socially weak people (multi culture, low income, grandchildren home and so on) including paralytic ones, for the system of elementary schools’ gymnastics teaching. 이 연구의 목적은 일반초등교사가 체육전담교사로서 장애학생의 체육활동 지도의 경험을 사회구조의 맥락 속에서 구체적으로 기술하고, 초등장애학생이 경험하는 차별을 통해 초등교육현장에 뿌리내리고 있는 일반학생중심의 거시적 사회구조의 역기능과 초등체육교육 교직문화를 비판하며, 초등교육현장에서의 장애학생의 체육활동 개선을 위한 교육적 의미를 모색하는 데 있다. 이를 위해 비판문화기술지를 통하여 연구를 수행하였으며, 참여관찰, 반성일지, 비구조화된 개별 심층면담, 일상대화에 대한 회고적 기술, 주요제보자들의 개인이야기 등을 통하여 자료를 수집하였고, 내용분석과 구조분석(Ellis, 2004)의 방법으로 자료를 분석하였다. 분석된 자료는 창조적분석과정기술법을 적용하여 소설 형식으로 기술하였으며, 결과는 다음과 같다. 초등교육 현장에서 장애학생이 체육활동에서 경험하는 불평등은 첫째, 무관심, 차별, 둘째, 무책임, 지배, 셋째, 만연과 순응의 모습으로 나타났으며, 이를 장애인차별 금지법을 바탕으로 논의하였다. 본 연구는 초등교사로서 장애학생 교육이 학교구성원들의 당위적 기대에 부응하기에 그치지 않고, 장애뿐만 아니라 사회적 약자(다문화, 저소득, 조손가정 등)들의 성장 가능성을 촉진시킬 수 있는 역량을 함양할 수 있는 초등체육 교육체제가 개선되어야 함을 시사한다.
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박동환,박상봉 동의공업대학 2001 論文集 Vol.27 No.1
The accumulated know-how and trial-and-error procedures are known as the best ways to determine blank shape and dimensions. One of the most important steps to determine the blank shape and dimensions in deep drawing process is to calculate the surface area of the product. The application of the surface area calculation to non-axisymmetric deep drawing process has not been published yet. A computer-aided process planning (CAPP) system for rotationally symmetric products had been developed. However, the application of the process planning expert system to non-axisymmetric components has not been reported yet. In this research, therefore, the process planning expert system for non-axisymmetric deep drawing products with elliptical shape was constructed for a design of blank shape and process planning of deep drawing products by using an AutoLISP function of AutoCAD software. The expert system for elliptical deep drawing products is constructed to recognize the geometry of the product in the major and minor axes by drafting in another two layers on AutoCAD software. This system consists of recognition of input shape, shape reading, three-dimensional (3-D) modeling. blank design and process planning modules, respectively. The process planning expert system would be very useful to reduce lead-time for manufacturing and improve an accuracy of products.
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政策科學(the policy sciences)의 기초적 과제에 대한 試案 : 社會科學과 哲學의 통합개념으로서의 갈등. 조직, 결정
朴東煥 弘益大學校 1973 弘大論叢 Vol.5 No.-
Many contemporary philosophers are concerned with a purely linguistic or axiomatic analysis of the systems of knowledge and value. They accordingly tend to consider the problem of philosophy unique and independent of other problems og men and society. In this article, it is contended that philosophers various systems of value and knowledge be considered to be the by-products of the quest for solution of such pressing problems as labor-management disputes, international and intergroup conflictot ideology, confrontation of government and its constituent people, etc. From such a standpoint, philosophy os a practical and social enterprise, an integral part of a whole human activity of problem-solving. It is therefore attempted at making the philosophical studies of value and knowledge relevant to the problems of policy decision in social situations snof man. Conflict, organization, and decision are found to be the most important philosophical concepts to constitute the main problems of the policy sciences. We reviewed a brief history of western political philosophy in order to introduce a classical concept of conflict, organization, and decision. But it is understood that the tradition of political philosophy is not the onlyresource in which the original concepts of the policy sciences are found. Finally, a current view of the policy sciences is sidcussed as the common concern of the philosopher and the social sciertist.
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