• KLA journal
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• v.54 no.2
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• pp.9-15
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• 2013

한국도서관협회는 도서간 정책부서와 지구별협의회 및 관종별 협의회의 2013년도 계획에 대해 도서관계에 대한 전망과 각 단체의 사업계획에 대한 조사를 실시하였다. 이에 2월호에서는 도서관 정책부서와 지구별협의회의 계획을, 3월에서는 관종별협의회의 계획을 각각 정리하여 소개한다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.35 no.8
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• pp.735-740
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• 2007

Star sensor provides highly accurate attitude information by imaging the stars in the dark space. The sensor output is disabled when the sensor avoidance of the Sunlight or the Earth's albedo is not satisfied. This paper studies the Sun and Earth avoidance characteristics of the star sensors according to the mounting direction. Then the paper proposes a systematic way of determining the star sensors mounting direction for typical remote sensing missions

• Water for future
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• v.18 no.2
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• pp.163-174
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• 1985

This study aims at the development of a technique for the optimal water allocation by applying Dynamic Programming Model for the effective usage and rational allocation of water resources, in case of which limited water resources in river basin should be used in several stages. In analytical procedure the possible allocable area was firstly zoned into the four areas: Pohang area ($C_1$), Yeungcheon area ($C_2$), Gyeungsan area ($C_3$), Daegu area ($C_4$), which are located between the Yeongcheon dam and the confluence of the lower Kumho river and the main course of the Nakdong river. Secondly, a return function was determined on the basis of the correlation between the GRP in each area and the amount of water used to it. A DP Model, finally, was applied to the allocation of the water resources according to both their usage and the areas. As a result, the fact has been found that when allocating by the area, $C_1$ could be possibly supplied only with the water resources avaiable from the Yeungchon dam, and the maximum units supplied to $C_1$ should be 240 units ($1unit=10^3㎥$ per day), beyond which we ought to develop an alternative water resources. Also, the return from the allocation by the usage exceeded the one from it by the area. At the same time it was more profitable to limit the water supply to $C_1$ into 217 units. In the allocation by the area 240 units and 80 units, if only the water resources available from the Yeungcheon dam used, and 360 units and 80 units if the Doil dam used additionally, could be supplied to $C_1$ and the lower region respectively. In the allocation by the usage 103 units for industrial water with 33 units for both domestic and commercial water and 183 units, if only the water resources available from the Yeungcheon dam used, and 103 units with 33 units and 304 units, if the Doil dam taken into consideration additionally, could be supplied to $C_1$ and the lower region respectively. Therefore, much more water could be allocated to the region of lower Kumho river if the method of water allocation by the usage.

• Journal of the Korean Society of Earth Science Education
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• v.13 no.3
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• pp.297-304
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• 2020

This study is to find out experiments of Earth's revolution and which experiment is effective by school level. Researcher investigated and developed eight experiments for students to learn Earth's revolution. Twenty six pre-service teachers did these experiments, discuss about them, chose an effective experiment of Earth's revolution and wrote the reason why. As a result, they thought that an experiment of seasonal constellations is effective for elementary school students, an experiment of seasonal star's spectrum is effective for secondary school students and an experiment of the superior planets' retrograde motion is effective for university students. Pre-service teachers gave reasons such as hands-on experience, connection with textbooks, background knowledge and higher-level thinking.

• KLA journal
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• v.54 no.3
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• pp.11-20
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• 2013

한국도서관협회는 도서관 정책부서와 지구별협의회 및 관종별 협의회의 2013년도 계획에 대해 도서관계에 대한 전망과 각 단체의 사업계획에 대한 조사를 실시하여, 지난 2월호에서는 도서관 정책부서와 지구별협의회의 계획을 소개한 바 있다. 이번 3월호에서는 관종별협의회의 계획을 정리하여 소개한다.

• Journal of the Korean earth science society
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• v.23 no.7
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• pp.609-609
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• 2002

• 한국지구과학회:학술대회논문집
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• 2002.09a
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• pp.40-40
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• 2002

• 한국지구과학회:학술대회논문집
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• 2010.04a
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• pp.114-114
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• 2010

중성자별을 포함하는 이중성인 EXO 0331+350을 가시광선 및 자외선으로 관측하였다. EXO 0331+350은 전형적인 Be/X-선 이중성인 것처럼 보이지만 특이하게도 공전 주기상의 근일점 마다 매우 밝아지는 다른 Be/X-선 이중성들과는 확연히 다르게 밝아지는 시기가 매우 불규칙하다. 따라서 그 물리적인 기작을 연구하기 위해서는 오랜 기간의 모니터링이 필수적이다.

• Journal of Information Management
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• v.39 no.2
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• pp.211-234
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• 2008

Recently, the frequency and scale of natural disasters such as typhoons, flood, earthquakes, and tidal waves from earthquakes has been increasing. Several nations have recognized that earth observation is essential for protecting the Earth's environment. However, as the data format from earth observation varies depending on areas, institutes, and countries, sharing and exchange between data is difficult. Thus, we have a metadata standardization scheme suitable for the domestic situation to allow exchange of data between societal benefit areas with reference to principles of data sharing and exchange that are discussed on GEO (Group on Earth Observation). We have also designed metadata schemes required to identify the metadata situation of earth observation data being used for 9 societal benefit areas of GEOSS(Global Earth Observation System of Systems).

• 어항어장
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• s.39
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• pp.18-22
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• 1997