• Proceedings of the Zoological Society Korea Conference
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• 1998.10b
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• pp.202.1-202
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• 1998

No Abstract, See Full Text

• 유체기계공업학회:학술대회논문집
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• 1998.12a
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• pp.7-10
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• 1998

The pump safety related to the functions in nuclear power plants must be designed to meet load conditions considering seismic requirements. In order to satisfy both structural integrity and operability of these pumps, the initial step in the seismic qualification is to establish the resonant frequencies of the structure. Applications are made to the design of the vertical and horizontal type pump. Computational results are analyzed with respect to the dynamic characteristics and are compared to the expected design requirements.

• Communications of the Korean Mathematical Society
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• v.29 no.1
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• pp.213-218
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• 2014

J. Malkevitch defined the coded path in r-valent polytopal graphs of uniform face structure and showed many interesting properties of the coded paths. In this paper, we study the simplicity of coded paths in an m-valent planar multigraph which is not a polytopal graph.

• Journal of the speleological society of Korea
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• no.4
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• pp.23-32
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• 1996

The geographic environment means the general state of the environment in the area. Especially, which means the generation cause, the development process of the cave, and the validity of cave development and conservation in the side of the place of the cave. This study put emphasis on lying in which place Hwaam cave in Tong-myon, Chong son-gun, Kangwondo is situated and having in which stand is in comparison with other districts, and how the geological structure which determine the cave forming cause is.(omitted)

• Proceedings of the Korean Magnestics Society Conference
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• 2015.05a
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• pp.139-139
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• 2015

• Bulletin of the Korean Chemical Society
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• v.35 no.6
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• pp.1871-1874
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• 2014

• Proceedings of the Korean Fiber Society Conference
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• 1998.04a
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• pp.5-8
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• 1998

Polyurethane elastomers are segmented cocoplymer with an [HS]n-type structure. Typically, these materials are two-phase systems, prepared from relatively polar and stiff component called the hard segment(H) and relatively flexible component known as the soft segment(S). Diisocyanate and chain extender together form the hard segment, which is dispersed within a matrix of the soft segment, composed of the macrodiolos.(omitted)

• International Commerce and Information Review
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• v.9 no.4
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• pp.127-139
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• 2007

There are three methods to examine import structures : 1) look at import coefficient, 2) import dependency, and 3) composition ratio of imported products. Therefore, this study analyses the import structure of Korea using the three methods above and when final demand occurs on produced goods and services in each industrial section, it divides import induction coefficients that indicate size of induced import directly and indirectly into consumption, investment and export to identify the effect of export on import induction.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.166.6-166
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• 2001

An attitude control of an air vehicle based on the variable structure control is proposed. For an air vehicle, minimum weight is required. Thus, it is desired to reduce the input energy. The optimal state portrait curve using time-varying sliding surface is proposed to reduce the control energy. Tracking performance of the closed loop system is guaranteed under the existence of parameter variation and external disturbances.

• Archives of Pharmacal Research
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• v.12 no.3
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• pp.219-222
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• 1989

Cartechin and catechin glycoside named uldavioside A were isolated from the Korean folk medicine Ulmus davidiana. Based on chemical and physicochemical evidences, their structure have been determined as (+) catechin (1) and (+)-catechin-5-0-$\betha$ D-apiofuranoside (2).