• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.45.2-45.2
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• 2000

• Proceedings of the Korean Geotechical Society Conference
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• 1990.10a
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• pp.9-24
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• 1990

Most tunnels in soft soils in urban areas are constructed by shield tunnelling method for environmental reasons. Ground surface settlements are caused by shield tunnelling so that auxiliary measures are often required. Simple methods to predict ground surface settlement are given. The use of the slurry or the earth pressure balance shield machine and the application of new methods of grouting with computer aided operation control systems decreases the ground surface settlement to 3 mm. The construction cost of tunnels is almost identical whichever type of shield machine is employed according to a statistical investigation.

• 제어로봇시스템학회:학술대회논문집
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• 1988.10b
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• pp.1022-1027
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• 1988

The author propose a method to realize a self organization in the artificial system. In self organizing system, sub-systems are not constructed as functional parts of the system but cooperate with one another to realize the total system. Each sub-system obtains the local purpose from the global purpose by learning. This function is realized by using a neural network. The validity of this method is confirmed by some simulations.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.588-591
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• 2009

This paper proposes a reversible information hiding method for binary images. A half of pixels in noisy blocks on cover images is candidate for embeddable pixels. Among the candidate pixels, we select compressive pixels by bit patterns of its neighborhood to compress the pixels effectively. Thus, embeddable pixels in the proposed method are compressive pixels in noisy blocks. We provide experimental results using several binary images binarized by the different methods.

• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.329-330
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• 2008

We experimentally demonstrate resonant-wavelength control of a series of an Si-based photonic crystal nanocavity. The cavities show a linear dependence on these parameters, a 1 nm increase of lattice constant leading to 4.2 nm increase of the resonant wavelength. The results have a small standard deviation of wavelength 1.1 nm between samples on a single chip.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.132-133
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• 2001

돌김류에는 잇바디돌김 (미역김, Porphyra dentata), 둥근돌김 (P. suborbiculata), 긴잎돌김 (P. pseudolinearis), 모무늬돌김 (P. seriata) 등이 있다 (Kang and Ko, 1997). 김의 맛과 밀접한 관계가 있는 함질소엑스성분에 관한 연구는 유리아미노산 (Noda et al., 1975: Saito., 1975; Yoshie et al., 1993, Araki et al., 1996, 1997; Sakai and Kasai, 2000), ATP관련 화합물 (Fujii, 1967; Ooyama et al., 1968; Tashiro et al.,1983,1991; Araki et al.,1996) 등이 있다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.104-105
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• 2001

Fucoidan은 갈조류 세포 내의 골지체에서 합성되어 세포간물질, 세포벽 구성 물질, 엽상체 표면의 삼출액 둥에 존재하는 산성 다당류의 일종으로 혈액 중에 존재하는 heparin과 그 구조가 비슷하여 혈액 항응고 작용이 있는 것으로 보고(Mori et al., 1982)되어 있으며, 그 외에도 항암작용(Noda, 1990)등 다양한 생리적 기능이 밝혀지고 있다. 또한 fucoidan은 점성이 낮고 용해성이 우수하여 수용성 식이섬유 소재로서의 이용가능성도 매우 높다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.134-135
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• 2001

우리 나라에서는 1990년부터 1999년까지 지난 10년간 생김(물김)을 매년 약 20만 톤 씩 생산하였고, 마른 김으로는 매년 약 70억매 (7천만속)를 생산하였다 (농림수산부, 1992-199 해양수산부, 1997∼2000). 김의 맛과 밀접한 관계가 있는 함질소 엑스성분에 관한 연구는 유리 아미노산 (Noda et al.,1975; Saito et 리.,1975; Tamano et al., 1992; Sakai and Kaishi. 2000), ATP관련 화합물 (Fujita and Hashimoto,1996; Fujii,1967; Ooyama et al., 1968; Araki et al.,1996) 등이 있다. (중략)

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2002.10b
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• pp.369-370
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• 2002

To clarify the tribological properties of biodegradable lubricating oils, the four-ball tests were carried out under dip-feed lubrication using a Soda-type four-ball machine. The test balls were lubricated with soybean oil, rapeseed oil, corn oil and turbine oil. From the tests, the coefficient of friction for all the test balls lubricated with biodegradable lubricating oils was lower than that for the test ball lubricated with turbine oil. Further, from the calculation of the pV value, it was clear that the seizure resistance for all the test balls lubricated with biodegradable lubricating oils was higher than that for the test ball lubricated with turbine oil.

• Structural Engineering and Mechanics
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• v.30 no.3
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• pp.317-330
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• 2008

Stress intensity factors for a planar crack parallel to a bimaterial interface are considered. The formulation leads to a system of hypersingular integral equations whose unknowns are three modes of crack opening displacements. In the numerical analysis, the unknown displacement discontinuities are approximated by the products of the fundamental density functions and polynomials. The numerical results show that the present method yields smooth variations of stress intensity factors along the crack front accurately. The mixed mode stress intensity factors are indicated in tables and figures with varying the shape of crack, distance from the interface, and elastic constants. It is found that the maximum stress intensity factors normalized by root area are always insensitive to the crack aspect ratio. They are given in a form of formula useful for engineering applications.