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초등과학 영재학급 학생과 일반학급 학생의 과학 학습정서와 과학적 상상력 비교
안태훈 ( Ahn Tae-hun ),최선영 ( Choi Sun Young ) 한국초등과학교육학회 2017 초등과학교육 Vol.36 No.2
The purpose of this study was to analyze science academic emotion and scientific imagination of students between a science gifted class and a general class in elementary school. Samples of this study were composed of 212 fifth and sixth graders in Gyeonggi province. The results of this study were as follows. First, positive scientific academic emotion of students in a science gifted class was higher than that of general class. Second, boredom and laziness of negative scientific academic emotion were higher scores in general students, whereas, angry area was higher scores of students in a science gifted class. Third, scientific imagination of students in a science gifted class was higher than that of general class. Fourth, both groups had a positive correlation between scientific imagination and positive science academic emotion. Especially, interest area of positive scientific academic emotion in both of the two groups influenced scientific imagination.
[제2분과/내진성능/교량/지반] 터널 설계를 위한 지보 기준 연구
안태훈(Ahn Tae Hun),정대석(Jung Dae Suk),변봉섭(Byun Bong Sup),이규환(Lee Kyu Hwan) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
A tunnel must be designed economically safely. We must calculate a load of a tunnel in order to confirm safety and an economy of a tunnel. However, this is impossible practically. Therefore, it is hard to confirm safety and an economy of a tunnel in the current technology. This paper tried to grope for the way that can analyze safety and an economy of a modern tunnel. According to the study results, a support pattern of a modern tunnel is more appropriate for a Terzaghi's loosening load. RMR shows a too large safety rate. When design a modern tunnel, we can use a Terzaghi's loosening load. In this case, the study about a way to adopt an appropriate safety rate is necessary
안태훈(Ahn Tae Hun),안성학(Ahn Sung Hak),이송(Lee Song) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
The behavior of an opening and the performance of support system depend upon the load-deformation characteristics of ground and support as welt as of the manner and of timing of support installation. The load-deformation characteristics of ground and support are derived by the interaction between ground and support. The interaction between ground and support is qualitatively illustrated by a ground response curve. The behavior of an opening and the performance of support system depend upon the load-deformation characteristics of ground and support as well as of the manner and of timing of support installation. The interaction between ground and support is qualitatively illustrated by a ground response curve. The convergence-confinement method don"t need the basic assumptions for a mathematical model. Also This is applicable to general tunnel. Consequently the stability of tunnel must be qualitatively investigated by a ground response curve and quantitatively adjudged by a numerical analysis for the reasonable design of tunnel.
안태훈 ( Ahn Tae Hun ),정대석 ( Jung Dae Suk ),변봉섭 ( Byun Bong Sup ),이규환 ( Lee Kyu Hwan ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
A tunnel must be designed economically safely. We must calculate a load of a tunnel in order to confirm safety and an economy of a tunnel. However, this is impossible practically. Therefore, it is hard to confirm safety and an economy of a tunnel in the current techonology. This paper tried to grope for the way that can analyze safety and an economy of a modem tunnel. According to the study results, a support pattern of a modem tunnel is more appropriate for a Terzaghi's loosening load. RMR shows a too large safety rate. When design a modem tunnel, we can use a Terzaghi’s loosening load. In this case, the study about a way to adopt an appropriate safety rate is necessary.
이송,안태훈,유오식,Lee, Song,Ahn, Tae Hun,You, Oh Shick 한국터널지하공간학회 2004 터널기술 Vol.6 No.3
터널의 설계에 있어서 RMR 분류방법은 암반을 분류하고 암반등급에 따른 지보패턴을 결정하기 위하여 널리 사용하여 왔다. 하지만 이러한 RMR 분류방법은 현장상태를 고려하여야만 구할 수 있는 변수들을 사용하고 암반을 분류하는 기술자의 경험적 판단에 의존될 수 밖에 없다. RMR 암반분류 방법을 설계단계에서 활용할 때 RMR의 평가요소들을 모두 고려하는 것은 실무적으로 불가능하다. 따라서 설계시 정량적인 요소만을 사용하여 RMR 분류 가능성을 확인하기 위하여 판별분석을 수행하였다. 정량적 데이터인 암석강도 혹은 RQD는 RMR 값과의 상관계수가 높으며, 기존 암반분류기준을 살펴볼 때 암석강도와 RQD는 암반분류를 위한 중요한 요소이다. 기존의 RMR 암반분류 방법을 통한 암반분류와 두 가지 변수만을 고려한 판별분석을 수행한 암반분류 결과 암석강도를 독립변수로 사용한 판별분석시 74.8%, RQD를 독립변수로 사용한 판별분석시 74.3%의 정확도로 RMR 암반분류가 가능하였다. 암석강도와 RQD를 함께 고려한 판별분석을 하였을 때 82.5%의 정확도로 RMR 암반분류가 가능하였다. 기존의 사례분석에서 RMR 전체 요소를 통하여 수행된 설계단계의 전체 적중률은 40.3% 정도 수준임을 감안할 때 설계단계에서는 암석강도와 RQD 만으로도 충분한 RMR 암반분류가 가능할 것이다. In designing a tunnel, RMR has been widely used to classify rock mass and to decide the support pattern according to the class of rock mass. However, this RMS system can't help relying on the empirical judgment of engineers who use variables which can be obtained only through consideration of the site conditions. In actuality, it is impossible to consider all the rating factors of RMS when using RMR system at the stage of designing. Therefore, in order to confirm possibility of RMR by use of only the quantitative factors for designing, this paper has done discriminant analysis. Rock strength or RQD has high coefficient of correlation with RMR value, and in consideration of the existing standards for rock mass classification, rock intensity and RQD are important factors for classification of rock mass. Through rock mass classification by the existing RMR system and rock mass classification by the discriminant analysis which has considered two variables only, the discriminant analysis using the rock intensity as an independent variable has shown 74.8% accuracy while the discriminant analysis using RQD as an independent variable has shown 74.3% accuracy. In case of the discriminant analysis which has considered both rock intensity and RQD, it has shown 82.5% accuracy. The existing cases have shown 40.3% accuracy at the stage of designing in which all the RMR factors are considered. It means that at the stage of designing, RMR system can work only with the rock intensity and RQD.
이송,안성학,안태훈,공성석,Lee, Song,Ahn, Sung-Hak,Ahn, Tae-Hun,Kong, Sung-Suk 한국철도학회 2002 한국철도학회논문집 Vol.5 No.4
We must notice ground movement by excavation for reasonable tunnel designs. The convergence confinement method is an attempt to evaluate tunnel stability conditions by means of a mathematical model and a ground response curve. In this study, the convergence confinement method by numerical model was examined. This method don't need the basic assumptions for a mathematical model of circular tunnel shape, and hydrostatic in situ stress. Also modified ground response curve that is calculated after installing the support, is suggested, which informs us the ground movement mechanism. The ground response curve and the support reaction curve are mutually dependent. Especially the support reaction curve depends upon the ground response curve. The mechanism of tunnel must be analyzed by the interaction between support and ground. Consequently the stability of tunnel must be qualitatively investigated by a ground response curve and quantitatively adjudged by a numerical analysis for the reasonable design of tunnel.