• Journal of the Korean association of regional geographers
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• v.11 no.3
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• pp.351-366
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• 2005

In Joseon dynasty, national roads for mainly official trips, were designed to connect capital directly to each county seat or eupchi, and militarily strategic points. The entrance of county seat where national road reach to (sometimes there has been a gate of fortress), regarded as main entrance of the county seat Also the direction county office or gwan-a ordinally heads was regarded as main entrance. Therefore, starting point of national road from county seat was not always heading for capital, but south because most of county offices head south. Nevertheless, actual traffic often ignore such a symbolic rule, and formed another practical routes.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.27 no.3
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• pp.223-228
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• 1982

Experiments were conducted to study the interrelationships between root development of rice plant and water managements at saline paddy field where has been grown rice plant for 3 years, and to compare the root development between two fields, saline and matured. Under the conditions of non interval and two day interval flooding at saline paddy fields, root systems developed well at surface soil, however, root systems developed well and distributed evenly through surface and sub-soil at saline field where underground drainage was performed, and at matured field. Root developments at field flooded with no interval and with two-day interval were poor as compared with those of saline paddy field of underground drainage and matured field. Regardless of water managements and fields, the ratio of stunted crown roots developed after panicle fromation stage was higher than that developed at early or middle growth stage.

• Proceedings of the Korean Society of Crop Science Conference
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• 1986.06a
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• pp.18-19
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• 1986

• Proceedings of the Korean Society of Crop Science Conference
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• 1989.02a
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• pp.54-55
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• 1989

• Proceedings of the Korean Society of Crop Science Conference
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• 1988.07a
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• pp.18-19
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• 1988

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.60-66
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• 2003

우리 생활 주변에 도로들이 일년 내내 파헤쳐 굴착되고 있어 교통도보 등 위험을 초래하고 특히 도심교통 유발요인이 되고 있음을 매체를 통해 접하게 된다. 이들 중 대부분은 배관공사 즉 가스배관, 수도배관, 하수도배관, 송유관 등 주요기반 공사에 해당된다. 역시 사고발생이 적지 않음을 알 수 있다.(중략)

• The Science & Technology
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• v.35 no.8 s.399
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• pp.22-23
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• 2002

캐나다 수도 오타와에 있는 캐나다 과학기술박물관은 3개의 수장고에 7만5천여점의 과학기술사물을 소장하고 있는데 이중 10%만이 전시되고 있다. 매년 1백20만여명이 관람하고 있는 이 박물관은 선박, 자동차, 소리와 통신, 우주, 전기코너 등으로 나누어 진열되어 있다.

• Proceedings of the Korean Society of Crop Science Conference
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• 1990.05a
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• pp.56-57
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• 1990

• The Science & Technology
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• v.35 no.10 s.401
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• pp.16-17
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• 2002

몽골의 수도 울란바토르의 중심부에 위치한 몽골 자연사박물관은 1924년 국립박물관으로 개관한 후 1954년 현재의 건물로 이전하여 공룡화석을 비롯한 희귀한 자연사 표본들이 전시되고 있다. 1층에는 다양한 광물 및 암석표본이, 2층에는 7천만년 전의 각종 실물 공룡화석 등이 눈길을 끈다. 또 3층에는 몽골에서 서식하는 사슴ㆍ낙타ㆍ곰 등이 전시되고 있다.

• Proceedings of the Korean Society of Crop Science Conference
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• 1988.02a
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• pp.42-43
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• 1988