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김선경,박재은,Kim, Sun-Kyoung,Park, Jae-Un 한국금형공학회 2020 한국금형공학회지 Vol.14 No.3
In injection molding processes, the property of molten resin should be characterized accurately. Among several properties, the PvT state is the most important one, since it affects the shrinkage, warpage, molded weight, and the part density. Thus, the PvT data is crucial to the simulation of the injection molding process. This work shows how such a measurement can be performed for a semi-crystalline and amorphous polymers. The PvT measurement has been conducted using a capillary rheometer using a suitable accessory that blocks the capillary. The results have shown that the PvT data can be obtained using such a rheometer and then the PvT coefficients of the Tait equation can be reached.
플라스틱 공학에서 제조 기술의 현황과 혁신 방안 - 열가소성수지, 복합재료와 금형을 중심으로 -
김선경,Kim, Sun-Kyoung 한국금형공학회 2021 한국금형공학회지 Vol.15 No.2
In this study, the current state of the plastics industry has been examined. The direction of development and innovation is reviewed and commented. The technical statuses of various sectors such as thermoplastic resin, composite material, mold engineering, and simulation have been scrutinized. In addition, the industrial status of each sector has been reviewed. Then, the challenges that the plastics manufacturing industry has to deal with have been discussed. Especially, the situation in Republic of Korea has been elaborated in detail. Based on the discussion, an open innovation strategy has been suggested. It has been argued in this work that the open innovation strategy will enables efficient funding and development by avoiding resource consuming rent seeking.
상단 등온조건을 갖는 이차원 슬랩에서의 경계위치 역추정을 위한 유한요소 정식화
김선경,허훈,이우일,Kim, Sun-Kyoung,Hurh, Hoon,Lee, Woo-Il 대한기계학회 2001 大韓機械學會論文集B Vol.25 No.6
A dependable boundary reconstruction technique is proposed. The finite element method is used for the analysis of the direct heat conduction problem to realize the deformable grid system. An appropriate strategy for grid update is suggested. A complete sensitivity analysis is performed to obtain the derivatives required for restoration of the optimal boundary. With the result of the sensitivity analysis, the unknown boundary is sought using the sequential quadratic programming. The method is applied to reconstruction of boundaries with sinusoidal, step, and cavity form. The overall performance of the proposed method is examined by comparison between the estimated the exact boundaries.
김선경(Kim Sun-Kyoung) 한국사연구회 2004 한국사연구 Vol.125 No.-
This paper strives to analyze Yu Hyeong-won's plans to build an ideal state, with a special focus on his plans for the taxation and financial systems. Yu Hyeong-won identified a state in which all members of society come to have their own spaces through the education of good citizens (yangmin) and human resources (yangsa) as an ideal one. Yu believed that an ideal state could be built when all the institutions that make up a state, such as financial, regulatory, and organizational institutions, were properly planned and managed. This study carries out an in-depth analysis of Yu's plans. Yu regarded himself as a planner sent to design the ideal state. Through his research, development, and promotion of his plans, Yu contributed to the development of a school of thought known as Gyeongsehak(經世學) studies on how to manage a state- that emerged as a new method for people to participate in their communities and nation. By introducing the methodology through which he planned to develop the taxation and financial systems, Yu showed how the Gyeongsehak could be applied to the proper management of the state.
한국인 6대 암에 관한 고등학생의 지식, 태도, 예방적 건강행위 실천도
김선경(Kim Sun Kyoung),이병숙(Byoung Sook Lee) 계명대학교 간호과학연구소 2006 계명간호과학 Vol.10 No.1
Purpose: The purpose of this study was to examine high school students" Knowledge, attitude, and preventive health behaviors for the six most common cancers in Korea.<BR> Method: Participants were 1,600 high school students in Daegu. Quata sampling was done by the ratio of sex and school type. Data collection was done from March 8 to 20, 2004, and 1,581 responses were analyzed. Questionnaires about cancer-related Knowledge, attitude, and preventive health behaviors were used. Data were analyzed using descriptive statistics, ANOVA, Pearson correlation in SPSS/WIN 11.0.<BR> Result: Mean score of the knowledge was 3.11(0.44), attitude 3.02(0.36), and preventive health behavior 3.36(0.41). The knowledge were different according to sex, school type, grade, number of health education, and concern about the cancers. Attitude were different according to grade, number of health education, concern about the cancers, and health status. Preventive health behavior were different according to the number of health education, concern about the cancers, and health status. The preventive health behavior were significantly correlated to the knowledge and attitude(r=0.0228, p=0.003; r=0.439, p=0.000).<BR> Conclusion: Based on the result the number of health education affected on the knowledge, attitude, and preventive health behavior, systematic health education about cancer for high school students is suggested.
김선경 ( Sun-kyoung Kim ) 한국사회사학회 2003 사회와 역사 Vol.0 No.64
This paper intended to examine the meanings that the minjung attached to their action, their aspirations, and the ways by which the minjung negotiated and (re}constructed their self-consciousness and their relationship with the world through participating in the peasant war. Participation of the minjung in the peasant war was first manifested as participation in the public sphere. The minjung aspired to engage in the public sphere through new ideologies, demands for legal and institutional reform, and transformation of the power structure. But mobilization of the minjung was possible because of the building of local social networks that neutralized the influence of local power-holders and that enabled them to construct of a new public sphere of their own. Underlying the process was the conscious effort made by the minjung to challenge the given hierarchy and to build new social relations based on the notion of equity. Another way through which the minjung participated in the peasant war was based on religious participation. Through participating in Tonghak, the minjung could establish themselves as active negotiators, interpreters, and the agents of God. Through religious rituals, the minjung was able to reinforce the belief that the Tonghak Heaven would come true with the peasant war.