• Journal of Korean Society for Atmospheric Environment
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• v.17 no.3
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• pp.289-297
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• 2001

From March 1998 to February 1999, we observed visibility and weather change in Dae Chung Bong and Kwon Keum Sung three times a day; at 10 Am, 1 PM and 4 PM. During research period (357 days for Kwon Keum Sung, 351 days for Dae Chung Bong), clear days were 185 days(52%) in Kwon Keum Sung and 149 days (43%) in Dae Chung Bong. Months that had many clear days in a year were December and January in both area. The rate of clear day to cloudy day in Sokcho downtown and Dae Chung Bong was 5 to 5, 4 to 6, respectively. The number of cloudy day in a year in Dae Chung Bong was 34days more than in Sokcho downtown. The visual distance in Kwon Keum Sung was 12.2km on the clear day, and 3.3km on the cloudy day. The yearly average was 7.9km. And we can see 8.9km farther on the clear day. The visual distance in Dae Chung Bong was 13.3km on the clear day, and 3.1km on the cloudy day. The yearly average was 8.1km. The visibility of clear day was 10.2km longer than that of cloudy day. The percentage to observe East Sea clearly was about 70% between December and January in both areas, and showed the highest visibility during research period. We observed Mt. Keumkang from 3 to 6 times in a month except rainy season. The yearly average visibility was 2%. If you go Mt. Serok except April, when there was yellow duet cloud from China, and rainy season (between the last of June and early of September), you can appreciate the most beautiful Mt. Sorak with Mt. Keumkang.

• Proceedings of the Korean Nutrition Society Conference
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• 2004.05a
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• pp.164-164
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• 2004

• Journal of the Korean Society for Precision Engineering
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• v.25 no.6
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• pp.7-12
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• 2008

• 한국약용작물학회:학술대회논문집
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• 2011.04a
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• pp.96-97
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• 2011

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.167-170
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• 2002

We have proposed new pixel structures for Active Matrix OELD (AMOELD) to improve the uniformity of luminance and manufactured a full-color 3.6-inch QVGA AMOELD. The proposed pixel structures, composed of four TFTs and one capacitor, can display 64 gray scales by compensating threshold voltage (Vth) variation of driving TFTs. Nonuniformity and peak intensity of measured luminance are under 14% and over $200cd/m^2$, respectively.

• 한국약용작물학회:학술대회논문집
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• 2011.09a
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• pp.92-93
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• 2011

• 한국약용작물학회:학술대회논문집
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• 2011.09a
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• pp.356-357
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• 2011

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.103-104
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• 2011

In this paper, an organic signal control method for the traffic lights system is suggested. To do this, Programmable Logic Controller(PLC) and position sensor are utilized to manufactured a traffic lights signal control system. An operating example of the manufactured traffic lights system in special situation is given to illustrate that the proposed method is effective better than the existing method.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.443-444
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• 2008

본 논문에서는 비행기 모델을 대상으로 invariance and immersion방법을 적용하여 비선형 제어기를 설계한다. 이 방법을 사용하면 추정오차에 대한 추정식 형태로 off-the-manifold 좌표축을 정의하고, dynamics를 구하고, 이로부터 파라미터 적응규칙을 유도한다. 제어기는 이와 관련된 파라미터로부터 선형 화하지 않고 직접 설정하며, 마지막으로 리아프노프 함수를 통하여 알고리즘의 안정성을 증명한다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.23 no.2
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• pp.15-20
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• 2015

This paper introduces a new airspace design method for continuous climb operation (CCO). The optimization problem is formulated as Mixed-Integer Linear Program (MILP) to maximize the upper limits of altitude on the waypoints to facilitate continuous climb for aircraft. In the proposed method, the interactions with other flight procedures are considered as well as various aircraft flight performances. The proposed method is applied to one of the departure procedures of Incheon International Airport (ICN) to demonstrate its performances.