• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.499-500
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• 2007

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2008.04a
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• pp.242-243
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• 2008

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2009.10a
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• pp.592-593
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• 2009

• Digital Contents
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• no.3 s.58
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• pp.24-31
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• 1998

객체/관계형 데이터베이스 시장이 전개되면서 객체 데이터가 기존 관계형 데이터에 새로운 데이터를 추가할 수 있는 복합 데이터 지원 여부에 관심이 모아지고 있다. 주요 데이터베이스 업체인 인포믹스, IBM, 오라클은 각각 데이터블레이드, 릴레이셔널 익스텐더, 카트리지란 확장 가능한 데이터 타입을 구성할 수 있는 도구를 제시, 기존 BLOB를 대체할 수 있는 확장관계형 데이터베이스 시장에 도전장을 냈다.

• Proceedings of the KSEE Conference
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• 2008.04a
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• pp.81-89
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• 2008

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.41 no.6
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• pp.502-508
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• 2013

Various combinations of cartridge and orifice were applied for ground ejection tests of a gliding bomb model equipped with a new guidance kit. Larger diameter of orifice made larger ejection force at each of bomb racks. Normal operations of the wing deploying mechanism and the devices inside of the bomb model were confirmed. Also high speed video data showed that pitch angle of the gliding bomb varied due to the ejection force.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.451-455
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• 2017

The reactive Eulerian-Lagrangian code is utilized to simulate combustion of ZPP/THPP in a closed vessel. In the paper, ignition delay of THPP is mainly studied since ZPP and THPP are isolated by a boron nitride wall. Only a numerical case study is conducted as experimental observation is inaccessible. Results showed THPP ignition delay affects initial shock strength thus not only the first peak become weak, but also the frequency of a pressure oscillation is slowed.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.423-425
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• 2017

When many space launchers and rockets need to be separated, the pyrotechnic separators have been widely used because of their high reliability and high energy generation. However, intensive pyroshock and debris from the high-explosive type separator may cause fatal damage to the equipment inside of the space launchers or rockets. To solve this problem, a pressure-cartridge type low-impact separator has been developed. In this study, one of the low-impact separators, the split-type pyrolock, was used. We established a mathematical model for the split-type pyrolock that simulates the state of combustion gas and the separation behavior of four independent internal components and verified the mathematical model through comparing with experiment results.

• Journal of Korean Tunnelling and Underground Space Association
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• v.11 no.2
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• pp.107-115
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• 2009

Lately, the length of tunnel, the number of large-long tunnel over three lanes are steeply increased because of the request for high speed and straight road. Therefore, the maximization of excavation efficiency is needed in tunnel construction. Bulk Emulsion explosives charging system is the spearhead equipment using the radio remote control $&$ mechanization system compare with a traditional method Cartridge type. This study introduced the bulk emulsion explosives which is new method in tunnel blasting and verified the efficiency of bulk emulsion explosives for long-large tunnel. And we tried to compare Cartridge type efficiency with bulk emulsion explosives efficiency by the field test.

• The Korean Journal of Nuclear Medicine Technology
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• v.22 no.1
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• pp.51-54
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• 2018

Purpose $^{18}F-THK5351$ is the newly developed PET probe for tau imaging in alzheimer's disease. The purpose of study was to establish the automated production of $^{18}F-THK5351$ on a commercial module. Materials and Methods Two different approaches were evaluated for the synthesis of $^{18}F-THK5351$. The first approach (method I) included the nucleophilic $^{18}F$-fluorination of the tosylate precursor, subsequently followed by pre-HPLC purification of crude reaction mixture with SPE cartridge. In the second approach (method II), the crude reaction mixture was directly introduced to a semi-preparative HPLC without SPE purification. The radiosynthesis of $^{18}F-THK5351$ was performed on a commercial GE $TRACERlab^{TM}$ $FX-_{FN}$ module. Quality control of $^{18}F-THK5351$ was carried out to meet the criteria guidelined in USP for PET radiopharmaceuticals. Results The overall radiochemical yield of method I was $23.8{\pm}1.9%$ (n=4) as the decay-corrected yield (end of synthesis, EOS) and the total synthesis time was $75{\pm}3min$. The radiochemical yield of method II was $31.9{\pm}6.7%$ (decay-corrected, n=10) and the total preparation time was $70{\pm}2min$. The radiochemical purity was>98%. Conclusion This study shows that method II provides higher radiochemical yield and shorter production time compared to the pre-SPE purification described in method I. The $^{18}F-THK5351$ synthesis by method II will be ideal for routine clinical application, considering short physical half-life of fluorine-18 ($t_{1/2}=110min$).