• 동위원소뉴스
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• no.9 s.33
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• pp.5-9
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• 1999

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.10 no.3
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• pp.177-184
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• 2000

The effect of the buyancy and thermocapillarity for differnent aspect ratio of flow field on melt motion and mass transfer has been numerically investigated in magnetic Czochralski crystal growth of silicon. During the process of crystal growth, the melt depth of crucible reduces so the aspect ratio of flow field also reduces. Therefore the shape of magnetic field of the flow field changes and the flow pattern also changes significantly. Together with the melt flow which forms the Marangoni convection (or thermocapillary flow) that comes from the inside the flow field, a flow circulation is observed near the corner close both to the crucible wall and the free surface. Due to this circulation, buoyancy effect has been turned out to be local rather than global. As the aspect ratio decreases, the radial component of the magnetic field prevails compared with the axial component in the flow field. Under the influence of this magnetic field, the melt flow and the temperature distribution in a meridional plane tend to depend on the radial position. As the aspect ratio decreases, the temperature gradient near the edge of the crystal decreases yielding smaller thermocapillarity, and the oxygen concentration near the crystal and the oxygen incorporation rate also decrease.

• Product Safety
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• s.192
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• pp.18-19
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• 2009

• The Optical Journal
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• s.117
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• pp.40-42
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• 2008

지난 99년부터 수입복사기가 세관장 확인 고시품목에서 제외된 후 국내에 불법 수입 복사기의 유통이 확산되면서 복사기 제조사들이 벙어리 냉가슴 앓듯 전전긍긍 할 때 한국후지제룩스(주)(대표.정광은, www.fujixerox.co.kr)에서는 업계에서 제일 먼저 전담팀을 두어 적극 시장 대응에 나섰다. 이와 함께 최재봉 팀장의 적극적인 활약상은 결과를 논하기에 앞서 사무기기관련 시장에 산적해 있는 여러 문제에 대하여 업계를 비롯한 관련 기관의 관심을 모으는 계기를 만들었다는 점에서 큰 반항을 불러일으켰다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.189-190
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• 2020

부산의 주요 핵심 산업인 항만물류산업의 경쟁력 강화는 지역경제 활성화의 필수 조건이며, 항만물류산업의 경쟁력을 강화하는데 있어 단순한 항만의 양적인 규모의 경쟁에서 질적 효율성의 문제로 전환되고 있습니다.····(중략)····.선용품 공급산업의 경쟁력 강화방안으로 해운산업, 항만산업, 물류산업, 제조업 등 산업간 정보교류를 효율적으로 활용 할 수 있는 블록체인 기반의 선용품공급업 세관신고 시스템 고도화 방안····(중략)····.블록체인 기술을 도입하여 분쟁해결 발생시 이에 대한 시간과 비용을 절약할 수 있도록 하여 글로벌시장에서의 경쟁력을 확보할 수 있도록 적극적인 도움을 줄 수 있을 것으로 기대된다.

• Proceedings of the Korea Multimedia Society Conference
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• 2001.06a
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• pp.91-94
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• 2001

유방 질만 분석을 위한 병리진단에서는 암종세포의 세관형성 정도와 핵의 다형성과 유사분말정도를 기준으로 하여 나누는 방법이 용이하고 재현성이 높다. 그 중에서도 세포핵의 크기와 다형성, 핵과 세포질의 비율은 양성종양과 악성종양을 분류하는데 있어서 중요한 요소중의 하나이다. 그러므로 본 논문에서는 유방 질단 영상에서 세포핵을 추출하여, 핵의 형태학적 특징값인 핵의 연적 둘레, 가로·세로(장·단축)의 길이를 구하고 핵과 세포질의 비율을 계산한 후, 추출한 형태학적 특성 칸들이 양성종양과 악성종양으로 분류하는데 있어서 유의한 특성 값인지 비교·분석하였다.

• Journal of the Korean Society for Nondestructive Testing
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• v.21 no.5
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• pp.556-560
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• 2001

Remote field eddy current testing (RFECT) with through-wall transmission characteristic is being applied to pipes ranging from small tubes of heat exchanger to natural gas supply pipelines. Cast iron pipes with nominal diameter of 100mm are used primarily as the waterline pipes. The leakage of water occurs due to defects in the pipes caused by vibration of automobiles and corrosion. But, the use of direct inspection methods such as insertion of inspection equipment inside the pipelines has been limited due to its lack of economical efficiency. Economical development of inspection equipments is possible since RFECT method can be easily employed for system integration and quantitative evaluation of both inside and outside defects. In this study, the development of underground pipeline inspection system was tarried out by using RFECT method in consideration of the characteristics of waterline network. This paper specifically describes the design and production of RFECT pipeline inspection pig using centralizer mechanism, development of remote field eddy current signal acquisition and processing software, and review of RFECT system operation procedures.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.8 no.4
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• pp.555-562
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• 1998

Under the influence of non-uniform magnetic field, melt flow in steady state and oxygen concentration in unsteady state are numerically investigated. The strength of the applied characteristic magnetic fields are B=0.1T, 0.2T, and 0.3T, respectively. The buoyancy effects due to the crucible wall heating and the thermocapillary effects due to the surface tention at the free surface are suppressed differentially by the non-uniform magnetic fields. As the intensity of characteristic magnetic fields is increasing, the recirculation region in the meridional plane is moving toward the growing crystal, and is diminishing. The oxygen concentration on the growing surface of crystals is decreasing and the uniformity of the oxygen concentration is increasing as the intensity of the magnetic fields is increasing.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1071-1075
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• 2003

In a closed square cavity filled with a liquid, a cooled the upper horizontal wail and a heated the lower horizontal wall, the flow isn't generated under the ground-based condition when Rayleigh number is lower than 1700. In such case the flow phenomena near an air bubble under a cooled horizontal wall were investigated. The temperature and the flow fields were studied by using the Thermo-sensitive Liquid-Crystal and the image processing. The qualitative analysis for the temperature and the flow fields were carried out by applying the image processing technique to the original data. Injecting bubble at the center point of upper cooled wall, the symmetry shape of two vortexes near an air bubble was observed. The bubble size increased, the size of velocity and the magnitude of velocity increased. In spite of elapsed time, a pair of two vortexes was the unique and steady-state flow in a square cavity and wasn't induce to the other flow in the surround region.

• International Commerce and Information Review
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• v.19 no.2
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• pp.145-166
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• 2017

The FTA conventional tariffs shall be applied that the imported goods are subject to the conventional tariffs under any agreement, and the origin of the good is the contracting state in accordance with the criteria for determination origin under any agreement. An importer who intends to be eligible for the application of a conventional tariff shall file a request for the application of a conventional tariff with the head of the competent customs house before the relevant import declaration is accepted. The purpose of this study is to examine the legal standard and verification cases for the judgement of the tax tribunal of FTA conventional tariffs. Through this study, this paper is to provide several implications for companies seeking the benefits of FTA conventional tariffs. The Korean companies to do the following: confirm the effective requirements for direct transport of goods through non-parties under the Korea EU FTA, confirm the criterion for application of conventional tariffs such as certificate of origin and claims for ex post facto conventional tariffs under the Korea US FTA, confirm the issuer of origin declaration and the recognition of origin declaration of bill of lading under the Korea EU FTA, utilize the tax appeal system by denial of FTA conventional tariffs, and prepare the discrepancies in interpretation of legal standard under FTA and FTA Special Customs Act.