• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1993.10a
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• pp.620-623
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• 1993

• The monthly packaging world
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• s.21
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• pp.112-115
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• 1995

• Journal of Korea Fair Competition Federation
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• no.87
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• pp.13-21
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• 2002

• Korean Deer Journal
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• v.2 no.3 s.8
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• pp.68-69
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• 1997

• Magazine of the Korean Society of Agricultural Engineers
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• v.62 no.1
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• pp.7-14
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• 2020

• Applied Chemistry for Engineering
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• v.2 no.4
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• pp.399-410
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• 1991

New separation process was developed for the preparation of storage-stable liquid dyes. The extent of aggregation of dye molecules was measured with respect to storage time of liquid dyes under different salt environments. Hollow-fiber membranes were modified by immobilization of inorganic crystals onto the surface of membrane. Using surface-treated membranes, counter diffusion technology was introduced to selectively remove salts from dye solution. The separation factors were 10-700, and the loss of dye molecules was less than 0.4 %. Membrane permeabilities for sodium ions($U_{M,Na}$) and dye molecules($U_{M,Dye}$) were found to be 2.75 and $0.72l/m^2/hr$, respectively, in the case of surface-treated membranes. The effects of various operating parameters on desalting efficiency were also investigated.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.7 no.4
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• pp.340-345
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• 1995

Dispersion characteristics of surface discharge heat water in shallow region are investigated for coastal power plant with nearly constant depth of 20 meters by observing the seasonal depthwide temperature in several stations, which give or precise horizontal distribution and vertical structure of heat water. Surface discharged heat water in shallow coast in the Yellow Sea relies mainly on ambient tidal flow. so it behaves as free jet when the ambient now is strong and shows plumelike behavior during stagnant tide. According to observation the neat field region is estimated as 200-300 meters and shows distinct vertical profile and exponentially decreasing pattern from discharge point for this region. But there are no remarkable vertical distortion of temperature beyond 800 meters even though it is discharged from surface. Characteristic length scale model, CORMIX3, is applied and compared with the field date Overall tendency of CORMIX3 results resemble well with field data especially in near field and intermediate region.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.9C
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• pp.721-728
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• 2010

CAMC (constant amplitude multi-code) has a better performance of error correction in iterative decoding than SPCPC (single parity check product code). CAMC benefits from a processing gain since it belongs to a spread spectrum signal. We show that the processing gain enhances the performance of CAMC. Additional correction of bit errors is achieved in the de-spreading of iteratively decoded signal. If the number of errors which survived the iterative decoding is less than or equal to ($\sqrt{N}/2-1$), all of the bit errors are removed after the de-spreading. We also propose a stopping criterion in the iterative decoding, which is based on the histogram of EI (extrinsic information). The initial values of EI are randomly distributed, and then they converge to ($-E_{max}$) or ($+E_{max}$) over the iterations. The strength of the convergence reflects how successfully error correction process is performed. Experimental results show that the proposed method achieves a gain of 0.2 dB in Eb/No.

• Journal of the korean veterinary medical association
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• v.48 no.9
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• pp.524-527
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• 2012

구제역은 급성 발열, 파행을 일으키며, 혀, 발굽, 콧등, 유두 등에 수포형성이 특징인 질병으로 소와 양, 염소는 지속감염(캐리어)동물이 될 수 있으며, 감염된 소의 경우 2-3년 동안 바이러스를 체내에 보유할 수 있다. 따라서 구제역의 정확한 진단 및 예찰은 구제역 청정화를 유지하고 관리하는 데 있어서 매우 중요한 일이다. 우리나라는 2010년 구제역이 발생하여 전국적으로 확산되는 상황에서 백신을 접종했다. 구제역 감염항체로 알려져 있는 비구조단백질 (non-structural protein : NSP) 항체를 검출하면 감염동물과 백신접종 동물을 감별하는 것이 가능하다고 알려져 있으나, 전국적인 백신접종으로 복잡한 축산현장에서는 NSP 검사결과를 해석하는 것이 어려운 경우가 생길 수 있다. 따라서 역학 등과 진단 결과를 종합하여 그 의미를 적절히 파악하는 것은 중요하다. 본 글에서는 구제역 방역에 있어서 중요한 실험법인 NSP 검사법의 실체와 결과의 의미에 대한 이해를 돕고자 하였다.

• International Journal of Highway Engineering
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• v.7 no.1 s.23
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• pp.31-38
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• 2005

Concrete has higher vapor pressure than its surrounding ambient air immediately after placement. Moisture at concrete surface evaporates to the ambient air to adjust equilibrium of the vapor pressure between them. The moisture inside the concrete moves to the surface because the evaporation at the surface causes gradient of vapor pressure inside the concrete. Plastic cracking, degree of hydration, strength development, and others caused by velocity of the moisture movement significantly influences quality of concrete. In this paper, the moisture diffusivity of early-age concrete was back-calculated using governing equation of the moisture diffusion, and temperature and relative humidity of concrete measured in a laboratory. The moisture diffusivity of the concrete was modeled using the back-calculated moisture diffusivity. The relative humidity of the concrete calculated by finite element method (FEM) using the modeled moisture diffusivity as Input data coincided with the measured relative humidity well.