• Ocean and Polar Research
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• 제26권1호
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• pp.87-101
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• 2004

This paper delineated the ecology including movement (departure from the rookery and returning to the rookery), egg-laying, and hatch of the penguins occurred in the cold years and a less cold year in the vicinity of King Sejong Station, King George Island off the Antarctic Peninsula. The years of 1988, 1991, 1992, and 1995 were selected as cold years and the year of 2001 was selected as a less cold year based on the mean annual temperature of the years. Gentoo Penguin (Pygoscelis papua) left their rookery in May, meanwhile some remained around the station. They returned in middle-September in the less cold .year, and returned in late-September to early-October in the cold years. Chinstrap Penguin (Pygoscelis antarctica) left their rookery in early-April in the cold years as well as in the less cold year without exception. They returned to the rookery in late-October to early-November in cold years, meanwhile in early-October in the less cold year. This difference in the returning of this bird seems to be related with the exposed sea water, i.e., sea ice condition to feed in the sea. The global warming will lead to the appearance of birds which breed in the Sub-Antarctic. For example, one pair of King Penguin (Aptenodytes patagonicus) was observed in the Maxwell Bay in austral summer. And a pair of snide-like bird was recently observed for the first time in November 2001 at the penguin rookery located in the Barton Peninsula, King George Island. And it will also lead to the disappearance of an Emperor Penguin (Aptenodytes forsteri) which appeared in the full winter when Maxwell Bay and Marian Cove were frozen. It seems that the behaviour of the penguins observed around the station shows the complex effects of the ecology of the birds in combination with the natural environments, which include feeding strategy and areas, animal Instincts, exposed terrain related to weather conditions, and globa1 warming. It is necessary to take further observation and carry out systematic researches on the birds including penguins around the station which show the ecology of the birds as well as the environmental changes.

• Ocean and Polar Research
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• 제25권1호
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• pp.9-20
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• 2003

A solar radiation model was used to investigate the UV radiation at the surface offing Sejong Station in West Antarctica. The results calculated by this model were compared with the values measured by UV-Biometer and UV-A meter during 1999-2000. In this study, the parameterization of solar radiative transfer process was based on Chou and Lee(1996). The total ozone amounts measured by Breve. Ozone Spectrophotometer and the aerosol amounts by Nakajima et al.(1996) was used as the input data of the solar radiative transfer model. And the surface albedo is assumed to be 0.20 in summer and 0.85 in winter. The sensitivity test of solar radiative transfer model was done with the variation of total ozone, aerosol amount, and surface albedo. When the cosine of solar zenith angle is 0.3, Erythemal UV-B radiation decreased 73% with the 200% increase of total ozone from 100 DU to 300 DU, but the decrease of UV-A radiation is about 1%. Also, for the same solar zenith angle, UV-A radiation was decreased 31.0% with the variation of aerosol optical thickness from 0.0 to 0.3 and Erythemal UV-B radiation was decreased only 6.1%. The increase of Erythemal W-B radiation with the variation of surface albedo was twice that of UV-A increase. The surface Erythemal UV-B and UV-A radiation calculated by solar raditive transfer model were compared with the measured values fer the relatively clear day at King Sejong Station in West Antarctica. The model calculated Erythemal UV-B radiation at the surface coincide well with the measured values except for cloudy days. But the difference between the model calculated UV-A radiation and the measured value at the surface was large because of cloud scattering effect. So, the cloud property data is needed to calculate the UV radiation more exactly at King Sejong Station in West Antarctica.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 춘계학술발표대회 논문집
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• pp.245-249
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• 2009

Antarctic King Sejong Station was established in King George Island, the South Pole in 1988, and has been executing the monitoring studies on the change of antarctic natural environment. As an available power, the wind energy generator has been used in the form of hybrid with mainly diesel generator. Because the wind generation power sharply changes by wind energy, it must be careful during the system operation. When the power system becomes stable, the output performance of wind energy generator becomes stable. But, in case of unstable system, the errors frequently occur on the wind energy generator and it badly impacts the power system by output of wind energy generator. The purpose of this paper is to analyze suitability while operating the system of 10kW wind energy generator at Antarctic King Sejong Station, an isolated area, and to analyze the problem and improvements by power quality.

• 한국공간구조학회논문집
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• 제20권3호
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• pp.63-70
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• 2020

Tomb of King Muryeong, located in Sonsan-ri, was found vulnerable due to leakages during since the summer of 2016. This research aims to evaluate structural safety of the Tomb under the tumulus. Site surveys were conducted to find vulnerable inner parts. Structural safety assessment is presented based on both site survey results and analytical results obtained through FEM analysis using the ANSYS program. The underground structure was explicitly modeled to focus on two types of loadings: design loads and actual gravity loads. In general, the tomb does not show any critical deflection increase or damage through the analytical investigation. However, maintenance through continuous monitoring is necessary to prevent severe deflections and stress concentrations since the rigidity of the tomb materials are very vulnerable and likely to be reduced due to prolonged weathering and continuous rain leakage.

• 한국태양에너지학회 논문집
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• 제29권4호
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• pp.41-47
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• 2009

Wind/diesel hybrid operation can be one of the most effective option for electrical power production at a remote area such as Antarctica. The king Sejong station at Antarctica relies its power production on diesel engines and diesel oil is supplied every other year by ships. However, the oil transportation processes are liable to potential oil spillage caused by the floating ice around the King George island. The long-term storage of the oil at the station can also contaminate the surrounding soils. A l0kW wind turbine has been installed to save oil consumption and operated in connection with the diesel generators since 2006. The diesel engine that operated poorly during the first year of installation was replaced in 2008 to enhance power production an recent measurements indicate that both diesel power quality and the wind turbine availability have been dramatically improved by the replacement. This report discusses electrical power qualities of wind/diesel hybrid system operating at an isolated micro gird located in the king Sejong station. Our experience reveals that the similar technologies can be applied to domestic islands, for example, in the south sea.

• 동북아문화연구
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• 제30권
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• pp.123-143
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• 2012

in the late 14th century, korean confucian literati, sinjinsadaebe(新進士大夫), tried to reform korean society in the base of neo confucianism. after Joseon Founding, korean confucian literati modified a lot of confucian ceremonies in order to substitute buddhist ceremonies. at first, they titled confucian ceremonies as "gyu sik(regulation manuals)", "Eui mun(ceremonial manuals)", and "Eui je(ceremonial manuals)". but in the end, they titled confucian ceremonies as "Eui gwe(Ritual Protocol Manuals)". they also titled the reports on national occasions as "Eui gwe(Ritual Protocol Manuals)". among the confucian reforms, the most important reforms were auspicious ceremony. korean confucian literati tried to make perfect confucian auspicious ceremony. the first national achievement by confucian reformers was the five national rituals in annals of king sejong. and the second national achievement by confucian reformers was the five national rituals. the royal cart regulated in the five national rituals in annals of king sejong was cart decorated by ivory. but the royal cart regulated in the five national rituals was the sedan with cover. the reason of the change of royal cart were king sejo's political showmanship and diplomatic pretext toward ming(明) china. after the publishment of the five national rituals, the royal cart was represented by the sedan with cover.

• 한국태양에너지학회 논문집
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• 제26권4호
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• pp.25-30
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• 2006

10kW wind turbine has been successfully commissioned at the King Sejong station in April, 2006. The wind turbine installed is a part of the R&D program for developing a solid wind/diesel hybrid power control system for a remote area such as Antarctica. At the same time, the current research aims to develop an anti-icing and de-icing technologies for a small wind turbine rated under 50kW. Since its commissioning, the turbine has generated about 500kWh for 47days without any system faults. Although sufficient data have not been obtained yet, any trouble has not occurred in the wind/diesel hybrid system based on the current analysis. Concerning on the environmental impact by the wind turbine operation, the turbine is installed within the station boundary in order to meet the Madrid protocol. Therefore, wind turbine operation meets the international requirements for preservation of antarctic ecosystem.

• 한국식품과학회지
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• 제23권4호
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• pp.523-525
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• 1991

18%의 염용액에 glucose와 glycine을 혼합하여 만든 간장 model system에서 산소가 갈변에 미치는 영향을 연구하였다. 간장 model system을 혐기적으로 저장하였을 때에는 갈변이 $13.2\;OD_{490}$이었던 것에 비해 호기적상태에 저장하였을 때는 $27.0\;OD_{490}$으로서 약 두배의 갈변이 관찰되었다. 이와 같이 산소의 존재가 갈변을 촉진시키는 현상은 유기산을 첨가한 시험구에서도 마찬 가지였다.

• 한국식품과학회지
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• 제23권5호
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• pp.646-648
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• 1991

우리나라에서 풍부하게 생산될 수 있으면서 흔히 과잉생산되어 문제가 되는 배추를 이용한 단세포단백 생산에 관한 연구를 하였다. Saccharomyces cerevisiae와 Candida utilis 공히 배추즙액에 잘 번식하였으며 $30^{\circ}C$에서 20시간 이내에 번식이 완결되었다. 이들 효모의 최종 건조균체량은 동결시킨 후 해동된 배추를 이용하거나 동결 되지 않은 배추의 즙액을 이용하거나 차이가 없었는데 S. cerevisiae와 C. utilis는 각각 4.3g/l 및 5.1g/l의 건조균체를 생산하였다.

• 건축역사연구
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• 제29권3호
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• pp.67-78
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• 2020

This study examines the transitional situation that can be seen from the palace operation in early Joseon Dynasty. The first decades of Joseon after the nation was founded differ from the Joseon Dynasty as a whole, but rather similar with the Goryeo Dynasty. By examining "The History of Goryeo(高麗史)," it showed that palace operation during the Goryeo Dynasy was marked by the fact that a separate palace was built and resided in despite the existence of the Bongweol(本闕, main palace) as the central palace. The separation of the parent's generation and the children's generation was shown through the establishment of one's own palace. Such trait of Goryeo affected palace construction directly after the founding of Joseon. This can be shown from the characteristic of palace operation by generation. The construction of the Changdeokgung Palace(昌德宮) of King Taejong, as his own palace, is an example. Afterwards, the palace system of Joseon was established, and the space of the king and the crown prince was merged through ritual reform during the reign of King Sejong. However, the space for the parents of the king were considered separate, and this influence continued to the reign of King Seongjong. The construction of Changgyeonggung Palace(昌慶宮) during the reign of King Seongjong is an event where the king proclaimed the separation with his mother and grandmother.