• Bulletin of the Korean Chemical Society
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• v.32 no.9
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• pp.3473-3476
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• 2011

• The Bulletin of The Korean Astronomical Society
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• v.28 no.1
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• pp.88-88
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• 2003

• The Bulletin of The Korean Astronomical Society
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• v.28 no.1
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• pp.89-89
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• 2003

• Natural Product Sciences
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• v.4 no.2
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• pp.68-71
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• 1998

Three grayanane diterpenoids (1-3) were isolated from Pieris formosa. 1 was identified as a new natural product and 2 and 3 as known grayanoside C and grayanotoxin XVIII on the basis of spectral analysis.

• Journal of the Korean Statistical Society
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• v.21 no.1
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• pp.35-46
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• 1992

On Box-Cox transformation, one or few responses are influential on transformation parameter estimator. To detect influential observatins, several diagnostics (Cook and Wang 1983, Hinkley and Wang 1988, Lawrance 1988, Tsai and Wu 1990) have been suggested. We compare these diagnostics and denote the necessity of multiple cases deletion which is important especially when the masking effect is present. Also, analytic expression of Tsai and Wu's diagnostic is given. We suggest a computationally feasible and useful algorithm based on the basic building blocks, and present descriptive examples using artificial data.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.1432-1436
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• 2006

Feasibility of optimizing Zwicker's loudness has been shown by using MSC/NASTRAN, SYSNOISE, and a semi-analytical design sensitivity by Wang and Kang. Design sensitivity analysis of Zwicker's loudness is developed by using ANSYS, COMET, and an adjoint variable method in order to reduce computation. A numerical example shows significant reduction of computation time for design sensitivity analysis.

• Proceedings of the Korean Society of Crop Science Conference
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• 1998.04a
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• pp.85-86
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• 1998

• Proceedings of the Zoological Society Korea Conference
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• 2000.10a
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• pp.189.1-189
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• 2000

No Abstract, See Full Text

• Bulletin of the Korean Chemical Society
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• v.31 no.1
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• pp.224-226
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• 2010

• Proceedings of the Ginseng society Conference
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• 1998.06a
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• pp.109-114
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• 1998

The northeast of China is the main productive area of wild ginseng, including Changbai Mountains the south of Little Xingan Mountains, Wanda Mountains and Zahang Guangcai Mountains. The author has been oberving the ecological environment of ginseng in more than 20 sites for 20 years and obtains a great deal of ecological environment data about the growth and development of ginseng. This research can provide theoretical basis for the development of ginseng culture and the protection of ginseng resource.