• 한국환경교육학회지:환경교육
• /
• 제13권1호
• /
• pp.96-110
• /
• 2000

There are some considerations that must take into account in environmental education in the aspect of the difference of value clarification between ecological and economic viewpoint on environment. Although we have a tendency to think that the differences are unavoidable because we are on the economy-oriented life, we should realize that such emphasis to economics comes from the differences between ecological and economic view point on environment. We have lived and thought on the basis of Economic view point, especially, environmental policies are established on the basis of economic efficiency. But this tendency has become great obstacles to environmental ethics education because it dilutes the reason of natural preservation and removes the fundamental reasons why the nature should be preserved. Therefore it is very difficult to balance the value clarification between economic and ecological viewpoint in actual life. Furthermore, environmental problems can not be solved only through economic approach, because of their limits to belief solving from providing incentives. It is very important to make people have a way of thinking which economic activities and debates can be made on the ecological resources. Therefore we can compare this relation to CHAE-YONG founded on Buddism and Chinese philosophy. CHAE means essence of every reaction in the cosmos, and YONG means the reaction itself. CHAE is regarded to ecological resources, and YONG is thought to every-day economic activities. YONG is not able to existwithout CHAE. If economic activities can be done on the basic limit of ecological resources, we can build suitable environment to living condition. We call this appropriate environment as SANG. In other words, the connection of CHAE-YONG-SANG means ecological resources - economic activities - sustainable environment. It is realized that the relations between economics and ecology should be equalized for the balanced environmental ethics education. This study tries to get out of unbalanced relations between economics and ecology from the persepectives of CHAE-YONG-SANG and it was done to suggest an alternative environmental ethics education program

• 신재생에너지
• /
• 제7권4호
• /
• pp.50-57
• /
• 2011

A wind turbine simulation program for the coupled dynamics of aerodynamics, elasticity, multi-body dynamics and controls of turbine is newly developed by combining an aero-elastic code and a multi-body dynamics code. The aero-elastic code, based on the blade momentum theory and generalized dynamic wake theory, is developed by NREL(National Renewable Energy Laboratory, USA). The multi-body dynamics code is commercial one which is capable of accounting for geometric nonlinearity and twist deflection. A turbulent wind load case is simulated for the NREL 5-MW baseline wind turbine model by the developed program and FAST. As a result, the two results agree well enough to verify the reliability of the developed program.

• 한국광학회:학술대회논문집
• /
• 한국광학회 2000년도 제11회 정기총회 및 00년 동계학술발표회 논문집
• /
• pp.110-111
• /
• 2000

A novel 2$\times$2 switching characteristics are investigated. This switching characteristics are obtained in the multimode interference waveguide structure. For analysis, beam propagation method (BPM) based on mode propagation theory is used. As a result, the extinction ratio of higher than 11.74dB is achieved.

• 한국정밀공학회지
• /
• 제23권11호
• /
• pp.50-57
• /
• 2006

The water leak in water-cooled generator stator windings can generate the serious accidents such as insulation breakdown and it brings a generator to the unexpected sudden outage. Accordingly, it is important to diagnose the water absorption of them for the effective operation of power plant. Especially, the capacitance value which is measured for diagnosis is very small so the special diagnosis methods like stochastic theory are needed. KEPRI developed the water absorption test equipment and diagnosis technology for them. The developed diagnosis technology is applied to the real system and the results of water absorption test for stator windings are agreed to them of water leak test.

• 천문학회지
• /
• 제36권spc1호
• /
• pp.13-20
• /
• 2003

Observations have indicated that magnetic reconnect ion may occur frequently in the photosphere and chromosphere as well as in the solar corona. The observed features include cancelling magnetic features seen in photospheric magnetograms, and different kinds of small-scale activities such as UV explosive events and EUV jets. By integrating the observed parameters of these features with the Sweet-Parker reconnect ion theory, an attempt is made to clarify the nature of chromospheric magnetic reconnection. Our results suggest that magnetic reconnect ion may be occurring at many different levels of the photosphere and chromosphere without a preferred height and at a faster speed than is predicted by the Sweet-Parker reconnect ion model using the classical value of electric conductivity. Introducing an anomalous magnetic diffusivity 10-100 times the classical value is one of the possible ways of explaining the fast reconnect ion as inferred from observations.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1999년도 하계학술대회 논문집 C
• /
• pp.1042-1045
• /
• 1999

This paper presents a new method for contingency selection of the transient stability. Contingency ranking in transient stability is done by estimating the change in the imaginary part of electro-mechanical oscillation mode, which represents modal synchronizing coefficient. And the change in the imaginary part is obtained by applying eigen-sensitivity theory of augmented matrix to linear system model. The Proposed algorithm was tested for New England System and compared the results with PSS/E dynamic simulation.

• 전기학회논문지
• /
• 제58권8호
• /
• pp.1585-1591
• /
• 2009

This paper describes a new method for extracting characteristic impedance of transmission line using Substrate Integrated Artificial Dielectric (SIAD). The new procedure to calculate the characteristic impedance of SIAD transmission line is described with the proper equations and basic transmission line theory. The characteristic impedance is determined as an almost fixed value in the proposed method, while it fluctuates according to frequency in the previous method. As the result, the effective dielectric constant of SIAD transmission line is calculated as a fixed value rather than fluctuating one. In order to show the validity of the proposed method, SIAD microstrip lines are simulated and measured, and characteristic impedances and effective dielectric constant are calculated and compared to the previous method.

• 제어로봇시스템학회논문지
• /
• 제8권2호
• /
• pp.113-119
• /
• 2002

An FLNN-based neural network controller is applied to precise positioning of XY table with friction as the extension study of [11]. The neural network identifies the frictional farces of the table. Its weight adaptation rule, named the reinforcement adaptive learning rule, is derived from the Lyapunov stability theory. The experimental results with 2-DOF XY table verify the effectiveness of the proposed control scheme. It is also expected that the proposed control approach is applicable to a wide class of mechanical systems.

• 동양고전연구
• /
• 제32호
• /
• pp.159-187
• /
• 2008

이 글은 조선후기 독서론의 변화 양상과 그것의 사상사적 의미를 추적하는 데 목표를 둔다. 이를 위해 사상 경향이 서로 다른 박세채, 정약용, 홍길주 세 사람을 선정하여 그들의 독서론을 주요 분석 대상으로 삼는다. 박세채는 전적으로 주자학의 범위 안에서 학문을 전개한 인물이다. 그의 독서궁리론은 독서의 범위가 주자학적 교학체계를 벗어나지 않고, 독서법이 경서의 도덕적 함의를 완미하고 체득하는 데 집중하는 것을 특징으로 하였다. 그는 경세에 대한 관심에서 예학을 중시하고 양명학 비판과정에서 지식 탐구의 중요성을 인정하였지만, 이 모두 도덕적 실천에 필요한 지식 즉 도학적 지식을 강조하는 것에 지나지 않았다. 이러한 의미의 독서궁리론은 이미 이황 이이 단계에서부터 확립되어 왔던 것으로서 박세채의 경우는 물론, 19세기 말까지 조선의 대다수 학자들을 통해 주자학적 세계관을 확산 강화해 가는 장치로 작동하였다고 할 수 있다. 조선후기에는 다른 한편에서 주자학에 대한 비판적 접근이 여러 각도에서 시도되었다. 이러한 주자학 비판은 당연히 종래의 독서궁리론에 대한 재검토를 수반하기 마련인데, 우리는 그 예를 정약용과 홍길주 등에게서 찾아 볼 수 있다. 경학을 최고의 사상적 원천으로 삼았던 정약용은 학문방법론상에서 박람의 특징을 보였다. 그에게서 박람은 학문의 실용성을 강화하기 위한 방안이면서, 동시에 경학의 탈주자학적 성격을 강화해 가는 통로였다. 문장가인 홍길주는 독서에서 특별히 깨우침을 강조하였다. 그는 한편에서 주자학적 형이상학의 주요 개념과 이론을 조목조목 비판 부정하고 있는데, 결국 그가 말하는 깨우침은 통체로서의 천리에 대한 깨우침이 아니라 개체 하나하나의 이치에 대한 깨우침이었다. 이상을 통해 우리는 조선후기 사상사가 주자학으로부터 탈주자학으로, 역동적으로 변화하는 과정에 있었음을 확인할 수 있다.

• 농촌지도와개발
• /
• 제26권4호
• /
• pp.205-219
• /
• 2019

It is more important than ever to have talent with innovative capacities for sustainable agriculture and rural areas, but adolescents's interest in and understanding of agriculture and rural areas is very low. Therefore, this study analyzed the experiences of participants in the Agriculture Career Exploration Activities Program. and suggests strategies to improve and revitalize agricultural education based on these findings. First, Institutions and facilities that run agricultural education programs need opportunities for self-checks. Second, it is necessary to develop various contents and its distribution channels to enable the experience related to it in daily life. Third, it is important to provide experience in the middle school curriculum, which requires the use of a system such as the Free Semester System. Fourth, education and promotion to parents and teachers is also important, as it has a direct impact on youth's perception of it.