• Journal of the Korean Institute of Telematics and Electronics S
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• v.34S no.6
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• pp.58-66
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• 1997

This paper proposes a multiresolution surface parameter estimation method for range images. Based on robust estimation of surface parameters, it approximates a patch to a planar surface in the locally adaptive window. Selection of resolution is made pixelwise by comparing a locally computed homogeneity measure with th eglobal threshold determined by te distribution of the approximation error. The proposed multiresolution surface parameter estimation method is applied to range image reconstruction. Computer simulation results with noisy rnag eimages contaminated by additive gaussian noise and impulse noise show that the proposed multiresolution reconstruction method well preserves step and roof edges compared with the conventional methods. Also the segmentation method based on the estimated surface parameters is shown to be robust to noise.

• Proceedings of the KSME Conference
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• 2000.11a
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• pp.123-128
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• 2000

A cracked-plate with a patch bonded on one side is treated with a crack-bridging model: assuming continuous distribution of springs acting between crack surfaces. the approximate weight function was introduced to obtain the stress intensity factor of patched crack subjected to residual stress or non-uniform stress. The stress intensity factors for the partially patched crack within finite plate or the patched crack initiated from a notch were successfully obtained by numerical calculation.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.367-369
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• 2004

근래 정보보안의 필요성이 대두됨에 따라 개인 사용자의 보안 지식이 다방면으로 필요하게 되었다. 특정 그룹에 속한 개인 사용자들의 보안패치나 백신 등에 대한 지식이 비슷한 수준일 수 없으므로 보안패치나 백신 등을 관리해 주는 솔루션이 필요하게 되었다. 이는 통합관제 센터나 흑은 보안패치 자동분배 솔루션를 사용하여 해결할 수 있으나, 시스템 관리자의 지속적인 패치 확인과 업데이트가 필요한 일이다. 시스템 관리자가 벤더를 검색하여 패치를 가져오는 방법은 지극히 주관적이고, 실수로 가져오지 못하거나 혹은 벤더의 업데이트 시간과 맞지 않아 긴급패치를 누락시키는 경우가 종종 발생한다. 또한, 자동분배 솔루션을 사용하는 네트워크의 병합이나 패치분배의 추가에 이렇다 할 대안이 없다. 이 논문에서 제안하는 패치 자동업데이트와 자동구성에 대한 방안은 패치의 누락을 미연에 방지하고 네트워크의 병합 등 패치분배 서버가 늘어나면서 생기는 문제점을 해결해준다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.2 no.3
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• pp.205-211
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• 1998

The purpose of this study is to evaluate shear strengthening effects of R/C beams with carbon fiber sheets. The major variables are shear reinforcement ratios, CFS strengthening ratios and strengthening methods of CFS. Following conclusions can be extracted. The shear capacity of beam strengthened with CFS is about 32~87% higher than that of beams without shear reinforcement. The strengthening effects of patch type is larger than those of strip type. The strain distribution in CFS intersected with shear crack is similar to that in stirrup and larger strain is observed in the middle of the shear span. It can be estimated that shear strength reduction factor ${\alpha}$=0.3 is appropriate for peeling effect of CFS.

• Proceedings of the Korean Biophysical Society Conference
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• 2003.06a
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• pp.36-36
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• 2003

Goldfish retina has been well studied to a great extent. In spite of that, electrical characteristics of dissociated horizontal cells(HCs) have not been identified in detail. Thus the cone-and the rod- HCs dissociated from goldfish retina were investigated electrophysiologically using whole-cell patch-clamping recording. To explore the basic electrical property, We examined voltage-dependent channels in all types of HCs. For the futher understanding of GABAergic pathway, the localization and distribution of GABA receptors was examined in cone- HCs including HC axon terminals(ATs).

• Journal of electromagnetic engineering and science
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• v.13 no.4
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• pp.208-213
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• 2013

This paper proposes a tag antenna for radio frequency identification (RFID) food system. The RFID tag antenna is designed and fabricated based on the rectangular loop concept used in the UHF band (Korean and Japanese standards, 916.7-923.5MHz). The proposed tag antenna is composed of a radiation patch, sensor tag chip, temperature sensor, oscillator, and battery. We conjugated matching between the tag antenna and the sensor tag using a U-shaped stub. Details of the proposed tag antenna design and the simulated and measured results are presented and discussed.

• Bulletin of the Society of Naval Architects of Korea
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• v.12 no.2
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• pp.13-34
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• 1975

Analytical solutions for the transient temperature distribution and quasi-static thermal stresses which arise in a thin circular disk of finite radius subjected to an instantaneous point source acting in its interior have been obtained. And the solutions have been extended to the case of a moving heat source with the aid of the Duhamel's superposition integral. The solutions given are in the form of double infinite serieses, and their numerical results have been compared with the experimental temperature histories. It can be found out that the theoretical histories of thermal stresses show a good agreement with the experimental results and the theoretical histories of thermal stresses show a good qualitative agreement with a physical phenomena. The solutions can be applied to the problems such as a flame hardening of the cylindrical machine elements and a circular patch welding or a circular cutting of the structural member.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.05a
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• pp.29-30
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• 2013

Steel corrosion is the most serious problem in RC structures. Even though patch repair method is normally applied in repair system, the effectiveness is not enough. Cathodic protection in active repair method to deteriorated RC structures. FEM model was developed to simulate the optimized cathodic protection condition. Iro oxidation, hydrogen evolution and oxygen reduction were considered to expect current distribution. Moisture content in concrete which can affect the electrolyte conductivity was used as initial condition.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.2 no.2
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• pp.197-205
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• 1998

The purpose of this paper is to analyze the electromagnetic field characteristics of array antenna with the finite difference-time domain algorithm. Finite difference equations of Maxwell's equations are defined in cylindrical coordinate systems. To simulate the unbounded problem like a free space, the Mur's absorbing boundary condition is also used. After modeling the array antenna with the grid structure, the transient response of the field distribution is depicted in the time domain.

• Journal of Species Research
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• v.9 no.2
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• pp.167-169
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• 2020

The Korean Olethreutinae comprises 277 species. In this study, two species of Olethreutinae: Hedya corni Oku, 1974 and Epinotia salicicolana Kuznetzov, 1968, are reported for the first time from Korea. Our records of Hedya corni are based on three specimens in both sexes from Islands Bogildo and Geojedo. The Korean record of Epinotia salicicolana is based on one male specimen from Muan-gun. The present records of Hedya corni represent the first occurrence out of Japan. Hedya corni is similar to Hedya inornata (Walsingham) but differs from the latter in having the reddish brown forewings. Epinotia salicicolana is similar to Epinotia solandriana (Linnaeus) but differs from the latter in having the smaller dorsal patch on the forewing. Habitus and genitalia of the two olethreutine species are illustrated and briefly described. Their bionomics and distribution are summarized. With our new records, the species numbers of the Korean Hedya and Epinotia are increased to 11 and 23, respectively.