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루소에 있어서 사적 가정교육과 공적 시민교육의 통합문제
김상섭 한국교육철학학회 2003 교육철학연구 Vol.0 No.29
Against the popular opinions that Rousseau advocates with the motto "back to nature" only the private education this paper tries to make evident the ambivalent character of the concept "nature". Look back is namely to identify with look forward. Nature means rather a rational reconstructed practical idea (the second nature) for the analysis of the present society than a initial state (the first nature) of the mankind. This idea of the "nature" enables me to understand Rousseau ́s thoughts of the natural education as a dialectical combination of the private and public education, which I explain here with the idea of the "education of the freedom and for the freedom". Education as humanization of the human being is possible and inevitable because man is enable to make himself perfect. It can be then actual only when the natural freedom grows to be the moral freedom according to the education and the social contract (general will) respectively, in other words, when the private education stands in connection with the public education. Key Words: Nature, Private education, Public education, Education of the freedom and the freedom, perfectibilité.
알루미나의 소결 중 CaO 불순물의 미세구조에 미치는 영향
김상섭,백성기 한국세라믹학회 1992 한국세라믹학회지 Vol.29 No.1
The effect of CaO impurity on the microstructural evolution during the sintering of ultrapure alumina(>99.999%) was studied under "clean" firing conditions. The sinterability of undoped alumina was low, but its microstructure was maintained uniform. In the case of CaO-doped alumina, the distribution of grain size and that of grain boundary dihedral angle became wider, and facetted pores observed frequently. When MgO was doped in addition to CaO, the sinterability increased drastically and the uniform microstructural characteristics resumed. This study suggests that the effect of CaO is to induce inhomogeneous microstructures presumably by anisotropic segregation to grain boundaries and pore surfaces, and that MgO suppresses the anisotropic segregation of Ca.
자중저감 철선일체형 중공 데크플레이트 슬래브를 사용한 합성보의 휨내력 및 CO<sub>2</sub> 감소량 평가
김상섭,박동수,부윤섭,Kim, Sang-Seop,Park, Dong-Soo,Boo, Yoon-Seob 한국강구조학회 2012 韓國鋼構造學會 論文集 Vol.24 No.3
The purpose of this study is to evaluate $CO_2$ reduction and the flexural performance of steel wire-integrated void deck plate slabs that were inserted in omega-shaped steel plates to reduce concrete and welded H-section beams. The void deck plate slab can secure the structure, not only reducing the weight of the building but it is also eco-friendly. Therefore, this study evaluated the flexural performance of the composite beam by conducting a monotonic loading test with the use of actuators. It quantitatively evaluated the $CO_2$ emission based on earlier studies. The main test parameters are the concrete thickness of upper slabs, and the interrupted width of the omega-shaped steel plate. The result of the test showed that the welded H-section beam applied steel wire-integrated void deck plate slabs that were inserted into the omega-shaped steel plate declined in flexural performance on the composite beam after reducing concrete volume. Likewise, it is effective in reducing $CO_2$. 본 연구의 목적은 콘크리트량을 저감시키기 위해 오메가형 강판을 삽입한 철선일체형 중공 데크플레이트 슬래브와 용접 H형강합성보의 휨성능 및 $CO_2$ 감소량을 평가하는 것이다. 중공 데크플레이트 슬래브는 콘크리트의 양을 줄여 건물의 중량을 저감시킬 수 있을 뿐만 아니라 환경친화적인 구조물을 확보할 수 있다. 따라서 본 연구에서는 액츄에이터를 이용한 단조가력 실험을 실시하여 합성보의 휨성능을 평가하였으며, 기존연구를 바탕으로 이산화탄소의 배출량을 정량적으로 평가하였다. 주요 실험 변수는 오메가형 강판 상부 슬래브의 콘크리트 두께, 오메가형 강판의 단속길이 등이다. 실험결과, 용접 H형강 보에 오메가형 강판을 삽입한 철선일체형 중공 데크플레이트 슬래브를 적용하여 합성보로 사용하면, 콘크리트 양의 감소에 의한 합성보의 휨내력 저하는 없는 것으로 나타났으며, $CO_2$ 절감에도 효과적인 것으로 나타났다.
압축력이 작용하는 Dome 구조의 말뚝머리보강 효과에 관한 연구
김상섭,표현석 한국기술교육대학교 2004 論文集 Vol.10 No.2
There are many kinds of pile foundations that propagate structural loading to ground, by recently in most case steel pile is used. In the case of steel pile the structural behavior of pile cap which combined with spread footing is important. Three kinds of forces, vertical force, horizontal force and moment are acted on pile cap. In this paper consider that acting vertical forcepressure on pil cap. This study based on the experiments of 4 specimens by steel pile cap test. We would like to inspect the property of pile cap reinforcement composed of domed structure by experiment for vertical pressure of it and analysing the behavior with a computer program.