• Journal of the Korean Crystal Growth and Crystal Technology
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• v.5 no.3
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• pp.269-277
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• 1995

Ultrafine TEX>$Al_2O_3$ powders were prepared from $AlCl_3$ and $Al_2(SO_4)_3$3 by using inductively coupled plasma (lCP) of ultrahigh temperature (above 5000 K) in heat source. The prepared $Al_2O_3$ powders had ${\alpha} - group ({\alpha}, {wdelta} ;and; {\theta})$ phase, a narrow size distribution and around 20 nm in meansize. It could be suggested that gas - solid reaction growth and interparticle sintering occured at the center of ICP tail flame (X = 500 mm) through the results of deposited aggregates - flock, whisker and platy on MgO polycrystal plate. And the formation mechanism of $Al_2O_3$ powders In spray - ICP reactor were described from upper results.

• Journal of Navigation and Port Research
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• v.29 no.3 s.99
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• pp.181-187
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• 2005

In order to reduce the management risks of and secure traffic safety of Aqua-bus which will be operated at the channel of Wolmi do and Yungjong-do for the first time in Korea, we investigate maritime traffic and natural environment around the channel, and analyze the factors of risk involved in her operation. We also propose the countermeasure to secure the safety of navigation in her service including precautionary area, exclusive terminal, operation management, and etc.

• Journal of Biosystems Engineering
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• v.5 no.2
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• pp.15-25
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• 1980

본 연구는 현재 국내 농촌에서 문제시되고 있는 벼의 건조와 저장방법을 개선하기위한 한 가지 방법으로써 Grain bin의 이용에 따른 기술적인 적용가능성을 구명하는데 있었으며 건조열원으로서는 상온공기와 Solar collector 에 의한 보충가열공기를 사용하였다. 건조시험에서는 벼의 건조속도, 층별함수율의 변화, 동력소모량, 도청수율 등을 측정 비교하였으며 건조가 완료된 후에는 저장시험도 아울러 실시하였다. 본 시험을 통하여 얻은 결과는 다음과 같다. 1. 본시험에 사용된 Solar Collector 는 집열면적이 $27.7m^2M$의 Flat-plate 형식이며 내부에 태양열의 저장모체로서 약 $7m^2M$의 검은 돌을 사용하였다. Collector 의 효율은 35%이었으며 Collector를 통과하여 Bin으로 들어가는 공기의 온도는 외기온에 비하여 주간에는 약 $4^\circ C$, 야간에는 약 $8^\circ C$, 정도 상승된 것으로 나타났다. 2. 상온공기와 Collector를 이용한 건조험결과 안전저장함수율에 도달하는 데 약 7일과 약 5일이 소요되었다. 3. 태양열 건조는 상온통풍건조에 비하여 곡물층간의 함수율차이가 약간 크게 나타났으나 건조속도가 빠를뿐만 아니라 동력소모량도 적은 것으로 분석되었다. 4. 건조시험이 완료된 직후 이차에 걸쳐 Bin 내에서 저장시험을 실시한 결과 저장기간중 벼의 안전보전이 가능했으며 평균함수율이 12.0~14.5%범위에서 유지되었다.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1994.04a
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• pp.264-264
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• 1994

본 연구는 보리 씨앗에 존재하는 리보솜 불활성화 단백질(RIP) 의 삼차원 구조를 X-선 결정학 방법을 이용하여 밝히고, 그 결과로 분자 차원에서 기능을 이해하는 것을 목적으로 하고있다. 리보솜불활성화 단백질은 N-glucosidase 반응을 통하여 단백질 합성을 저해하기 때문에 세포를 죽일 수 있다. 따라서 암세포만을 특정적으로 인식하는 다른 물질과 결합시키면 암세포만을 특정적으로 죽일 수 있는 면역독소로 이용될 수 있다. 또, 최근에는 항바이러스의 작용을 함이 밝혀져 많은 연구가 진행되고 있다. 단백질 삼차원 구조 규명을 위해서는 여러가지 단계가 있는데 지난 번 과제까지 성공적으로 리보솜 불활성화 단백질의 대량 분리와 X-선 결정학의 필수 요건 좋은 결정을 길렀고, 이번에는 구조 해석을 위해 꼭 해결해야하는 위상문제를 극복하기 위하여 여러가지 실험을 진행하였다. 우선, 비슷한 구조인 피마자씨에서 분리한 Ricin의 A-체인과 미국자리공 잎에서 분리한 Pokeweed antiviral protein의 삼차원 분자좌표를 이용하여 분자치환법으로 위상문제 해결을 시도하였다. Ricin 의 A-체인을 이용하였을 때 분자의 위치가 정확히 찾아지지 않았고, 다른 모델인 Pokeweed antiviral protein을 이용하여 X-PLOR 프로그램내의 PC refinement법으로 분자치환을 시도하였다. Euler각도로 (187.37, 22.5, 311.94) 의 회전해 (Rotation solution) 를 가지고 있었고, 이러한 해에 맞추어서 분자를 돌려둔 후, 이동해 (Transaltion solution) 을 구해서 그 위치 (Orientation) 로 분자를 이동하였다. 이 때 R값은 53.9 % (8.0 - 3.5$\AA$) 이였고, 부분좌표 (Fractional coorcdinate) 에서는 0.102, 0.000, 0.261 이고, 직교좌표 (Orthogonal coorclinate) 에서는 4.616, 0.000, 13.167 의 결과를 얻었다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.62 no.7
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• pp.1038-1044
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• 2013

A research on thermal analysis method is conducted for the characterization of heat generation during operation of Interior Permanent Magnet Synchronous Motor(IPMSM) for Light Railway Transits(LRT) in this paper. Efficient cooling of the heat generated in the IPMSM is important because the excessive heat generated from the winding, core and permanent magnet makes it harder for a long time continuous operation of IPMSM. Therefore, in order to analyze the heat generation characteristics of the 110kW-class IPMSM as advanced research for application the IPMSM to the cooling device, the heat transfer coefficients for each component of the 110 kW-class IPMSM were derived and the thermal equivalent network was configured to perform the thermal analysis in this study. Finally, the 110kW-class IPMSM prototype is made and a comparative verification between the test data and the thermal analysis results through its various performance tests are carried out.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.13-14
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• 2016

Many ships' collision accidents occur due to unlawful action at sea. And also at shore traffic, many car collision accidents occur due to unlawful action. Therefore In this study we analyzes actual collision accidents at sea with the regards of liability. and search and analyze similar car collision accidents at shore traffic to compare it with the ship collision. In result, this study suggests the liabilities of the two different types accidents are needed to change more reasonable liability apportionment.

• Journal of the Korean Institute of Navigation
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• v.24 no.5
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• pp.373-383
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• 2000

The ship’s safe mooring stability is a principles for the safe cargo handling works at the mooring berth. Today numerous standards, guidelines and recommendations concerning mooring practices, fittings and equipments exist throughout the worldwide maritime industries. In recently, the mooring facilities were constructed as dolphin types at the open sea area apart far from shoreside instead of enclosed coastline area in accordance with increasing ship’s size and for preventing environmental pollution. Therefore the exciting wave condition must be considered as a basic environmental criteria with the wind force and current force for all of the mooring ships at the sea berth facilities. In this study, this added wave force as one of the environmental external forces by using the theoretical formula was applied to the LNG ship in Pyeongtaeg harbor needed the special mooring stability of the sea berth. Through this research, it can be confirmed that wave force is the very important factor in the mooring force and the strength of wave force works much more in the full laden condition than in the lightship condition. And also the wave force changes to non-linear states according to the wave frequency and wave length. In addition, the maximum limit criteria of environmental force of prohibiting the entering ship on the berth and loading works controlled by the port authority concerned of Pyeongtaeg port fully satisfies the condition of the mooring limit force recommended by OCIMF that the safe permitted force of the mooring line have to be within 55 % of MBL.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.06a
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• pp.46-48
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• 2014

The port of Incheon is very famous of strong current and many curved fairway with exist of many islands around the fairway. Therefore the max size of calling vessel is restricted in 50K DWT with 13.0m draft. However in the near future, half cargo loaded VLCC will call SK energy Dolphin berth for discharging of crude oil. In this connection, this study will evaluate the safety of passing for Dongsudo-fairway by using the shiphandling simulation data that was produced by familiarized training & education for Incheon port pilots about VLCC's maneuvering characters and the fairway of Incheon port.

• The Journal of the Society of Korean Medicine Diagnostics
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• v.18 no.2
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• pp.63-74
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• 2014

Objectives The purpose of this study was to survey the current status of use of questionnaires for evaluating Yin Deficiency Syndrome and analyze the comparison with questionnaires. Methods We searched online medical databases to find domestic/international articles using questionnaires for evaluating intensity of Yin Deficiency Syndrome. Finally 18 articles were collected to be reviewed and they were classified according to their subjects and type of the Questionnaires. Results Out of 18 articles, 11 were based on the Yin-Deficiency Questionnaire (Yin-DQ) and the others used various questionnaires, except the Yin-DQ, for assessing Yin Deficiency Syndrome. In Korea the Yin-DQ was used widely but in foreign countries, for instance, China, Taiwan, a variety of questionnaires were used. Conclusion The Yin-DQ had a wider use in assessing Yin Deficiency Syndrome, but cut-off score for diagnostic criteria was not defined. Therefore, we decided that the YDS (Yin Deficiency Scale) with cut-off score was more suitable for screening patients with Yin Deficiency Syndrome. Moreover, we suggested that additional studies on using the YDS and developing more appropriate diagnostic tool should be conducted to improve diagnostic objectivity.

• Atmosphere
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• v.20 no.4
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• pp.505-518
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• 2010

We investigated the impacts of the diabatic heating location, vertical profile and basic state on the Rossby wave propagation. To examine the dynamical process of individual responses on the regional heat source, a dry version of the linear baroclinic model was used with climatological summertime (JJA) mean basic state and vertical structure of the diabatic heating for 1979-2008. Two sets of diabatic heating were constructed of those positioned in the mid-latitudes (Tibetan Plateau, eastern Mediterranean Sea, and the west-central Asia) and the tropics (the southern India, Bay of Bengal, and western Pacific). It was found that using the principal component analysis, atmospheric response to diabatic heating reaches to the steady state in 19th days in time. The prescribed mid-latitude forcing forms equivalent barotropic Rossby wave propagation along the westerly Asia jets, whereas the tropical forcing generates the Rossby wave train extending from the tropics to mid-latitudes. In relation to the maximum vertical profile, the mid-level forcing reveals a stronger response than the lower-level forcing, which may be caused by more effective Rossby wave response by the upper-level divergent flow. Under the different sub-seasonal mean state, both of the tropical and mid-latitude forcing induce the different sub-seasonal response intensity, due to the different basic-state wind.