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노승탁,유호선 慶尙大學校生産技術硏究所 1989 生産技術硏究所論文集 Vol.5 No.-
A coordinate transformation method for numerical solution of moving boundary problems has been presented. In order to deal with numerical difficulties arising from the movement and irregular shapes of boundaries, the moving grid system generated by time-dependent Boundary-Fitted coordinates is adopted. Examination on the transformation process of governing equations shows that geometrically conservative form is preferable to non-conservative one in view of numerical stability and physical interpretation. Finally, transformed governing equations in generalized form have been derived on the moving grid system.
김성수,노승탁 가톨릭대학교 자연과학연구소 2001 自然科學論文集 Vol.9 No.-
The thermodynamic second law analysis, which means available energy or exergy analysis, for the indicated performance of Otto cycle engine has been carried out. Each operating process of the engine is simplified and modeled into the thermodynamic cycle. The calculation of the lost work and exergy through each process has been done with the thermodynamic relations and experimental data. The experimental data were measured from the test of single cylinder Otto cycle engine which operated at 2500 rpm, WOT (Wide Open Throttle) and MBT (Minimun advanced spark timing for Best Torque) condition with different fuels: gasoline, methanol and mixture of butane-methanol called M90. Utilized data are cylinder pressure, air and fuel flow rate, exhaust gas temperature, inlet gas temperature and etc. The proposed model and procedure of the analysis are verified through the comparison of the work done in the study with experimental results. The calculated results show that the greatest lost work is generated during combustion process. And the lost work during expansion, exhaust, compression and induction process follows in order.
김성훈 ( Sung Hoon Kim ),노갑택 ( Gap Taik Ro ),신정택 ( JUng Tack Shin ) 대한무도학회 2010 대한무도학회지 Vol.12 No.3
본 연구의 목적은 태권도 선수들의 정신력에 대한 개념 구조를 파악하여, 현장의 지도자에게 유용한 자료를 제공하고 태권도 선수들의 정신력 측정도구 개발의 기초자료를 마련하는 것이다. 본 연구대상자는 대한태권도협회에 등록된 태권도 선수 403명을 대상으로 개방형 질문지를 통해 조사하였으며, 개방형 질문 내용에 대한 객관적인 타당성을 확보하기 위해 국가대표 태권도 선수 5명(남자 3명, 여자 2명)을 임의로 선출하여 면접지침에 따라 면접을 실시하였다. 태권도 선수들의 정신력 개념 구조 즉, 심리적인 표상화, 정신력을 발휘하는 상황적 맥락(훈련 및 시합상황)을 파악하기 위해 개방형 질문지와 면접을 통해 수집된 자료를 참고하여 귀납적 분석을 실시하였다. 태권도 선수들의 정신력을 조사한 결과 총 637개의 원자료를 분석하여, 일반영역 7개와 세부영역 21개로 태권도 선수들이 시합과 훈련 상황에서 정신력 개념은 집중력, 자신감, 투혼, 승부욕, 최선의 노력 등으로 표상화 하였다. 향후 본 연구를 바탕으로 태권도 선수들의 정신력 훈련 프로그램과 심리기술훈련의 효과를 정확하게 검증할 수 있는 태권도 선수들의 정신력 측정도구 개발 연구가 진행 되어야 할 것이다. The purpose of this study was to develop measuring apparatus of mental toughness for Taekwondo players as the previous study, to understand conceptual formation about mental toughness of Taekwondo players, and to offer basic data of the development measuring apparatus of mental toughness of Taekwondo players to acquire applicable data for player and coaches. The subjects of this study were 403 Taekwondo players who are registered on Korea Taekwondo Association, and they completed the survey through the open-questionnaire. To ensure objective validity about the questions of open-questionnaire, 5 National Taekwondo Players(3 male players, 2 female players) were selected randomly and we interviewed them followed by guide of the interview. To understand the conceptual formation about mental toughness of Taekwondo players, showing psychological image and mental toughness on situational connection(practice and game situation), the data was analyzed by inductive analysis through collected data, the open-questionnaires and interview. The data analysis was based on the general concept of grounded theory proposed by Glaser and Strauss(1967). After analyzing total 637 row data, the result through surveying the mental toughness of Taekwondo players showed that it was divided by 7 normal domains and 21 specific domains. The concept of mental toughness during practice or game for Taekwondo players was represented by concentration, self-confidency, winning spirit, fighting spirit, and utmost efforts. Further studies will be continued the study about mental toughness training program and effect of psychological skill training more accurately based on this study.
이문주,노승탁,Ro, Sung Tack 대한기계학회 1977 대한기계학회논문집 Vol.1 No.4
The solidification process in a cylinder with finite thickness in studied by explicit finite difference method. The temperature distribution, the solidification front profile and the dischrged latent heat for the process are obtained. It is found that the solidification front profile is almost linear except in the vicinity of the initation of phase change. This result motivates us to use linear relations between the position of solidification and time for approximate calculations.