• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 추계학술발표회
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• pp.13-21
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• 2003

국제해사기구(IMO)는 해상인명안전협약(SOLAS)에 2002년 7월 1일부터 신조되는 총톤수 500톤 이상의 모든 선박에 자동선박추적장치(ATA)를 탑재시키도록 규정하였으나, 이 SOLAS 협약에 적용되지 않는 현재 운항중인 10,000톤 미만의 현존선은 ATA의 비탑재로 인하여 충돌사고가 빈발하고 있다. 본 논문에서는 ATA의 일부 요소기술이 국산화되어 있으나 가장 핵심적인 자동추적 알고리즘 개발은 아직 미비한 실정에 있으므로 자동추적 알고리즘의 핵심요소기술의 연구개발을 통하여 ATA를 국산화하여 연안에서 항해하는 중소형 선박에 보급함으로서 충돌사고 등을 미연에 방지하고자 한다.

• 해양환경안전학회지
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• 제9권2호
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• pp.5-13
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• 2003

국제해사기구(IMO)는 해상인명안전협약(SOLAS)에 2002년 7월 1일부터 신조되는 총톤수 500톤 이상의 모든 선박에 자동선박추적장치(ATA)를 탑재시키도록 규정하였으나, 이SOLAS 협약에 적용되지 않는 현재 운항중인 10,000톤 미만의 현존선은 ATA의 비탑재로 인하여 충돌사고가 빈발하고 있다. 본 논문에서는 ATA의 일부 요소기술이 국산화되어 있으나 가장 핵심적인 자동추적 알고리즘 개발은 아직 미비한 실정에 있으므로 자동추적 알고리즘의 핵심요소기술의 연구개발을 통하여 ATA를 국산화하여 연안에서 항해하는 중소형 선박에 보급함으로서 충돌사고 둥을 미연에 방지하고자 한다.

• 한국자기공명학회논문지
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• 제9권1호
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• pp.29-37
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• 2005

Intra-cellular drug uptake in Xenopus laevis oocyte has been elucidated using localized MR spectroscopy (MRS) and PFG NMR techniques at a 600 $MH_z$(Bruker, 14.1 T) NMR spectrometer. The localized MRS has been done with a homemade probe, and shows the intra-cellular uptake of nicotinamide. The self-diffusion of the molecule in Xenopus oocyte was obtained by PFG NMR technique. The measured data are well fitted with a linear combination of two exponential functions, which shows that there are two types of drug molecules, intra-and extra-cellular molecules. Diffusion coefficients of intra- and extra-cellular drug molecules are 3.7 $\times$ $10^{-11}$ $\m^{2}/s$and 6.4 $\times$ $10^{-10}$ $\m^{2}/s$, respectively. In the weighting factors there is shown that about 5% of drug molecule is inside the cells. These techniques can be used for drug screening in molecule-, cell-, and tissue-based preclinical test.

• 인터넷정보학회논문지
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• 제21권1호
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• pp.111-117
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• 2020

Dessert Ateliers (DA) are small shops that sell high-end homemade desserts such as macaroons, cakes, and cookies, and their popularity is increasing according to the emergence of small luxury trends. Even though each DA sells the same kinds of desserts, they are differentiated by the personality of their pastry chef; thus, there is a need to purchase desserts online that customers cannot see and purchase offline, and thus dessert e-commerce has emerged. However, it is impossible for customers to identify all the information of each DA and clearly understand customers' preferences when buying desserts through the dessert e-commerce. When a dessert e-commerce service provides a DA recommendation service, customers can reduce the time they hesitate before making a decision. Therefore, this paper proposes two kinds of DA recommendation method: a clustering-based recommendation method that calculates the similarity between customers' content and DAs and a dynamic weighting-based recommendation method that trains the importance of decision factors considering customer preferences. Various experiments were conducted using a real-world dataset to evaluate the performance of the proposed methods and it showed satisfactory results.

• 한국지역사회생활과학회지
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• 제28권2호
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• pp.329-340
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• 2017

This study investigated the situation of eating meals to identify factors influencing skipping breakfast and types of foods consumed for breakfast among adolescents classified by household type. Adolescents were found to consume mainly homemade meals for breakfast and dinner while consuming institutional foodservice at school for lunch. Percentage of skipping meals among adolescents was different by time of meals, and they skipped meals due to lack of time, which was different according to household type. Main food for breakfast was rice, and percentage of skipping breakfast was the highest in single parent households. Satisfaction of food-related life was lowest in grandparent households. Especially, satisfaction was highest if they had rice for breakfast. For influencing factors on skipping breakfast, social support, eating regularly, concern for origin, and single parent household were found to be significant. For influencing factors on types of foods consumed for breakfast, eating regularly, exercise, satisfaction of food-related life, and concern for food safety among adolescents were found to be significant. If adolescents in grandparent households had rice, they were less likely to skip breakfast.

• 한국화재소방학회논문지
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• 제21권3호
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• pp.104-112
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• 2007

교육, 훈련, 연구에 사용된 의료 시뮬레이션 교육으로서 마네킹 시뮬레이터(mannequin simulator)의 개발은 오랜 시간에 걸쳐 이루어지고 있으며, 심폐소생술, 심장 수술, 마취 임상 수기, 위기관리(crisis management)에 대한 효율성 평가로 이어졌다. 최근 한국의 여러 의과대학에서 시뮬레이션 교육을 도입하여 임상 수기 교육을 하고 있으며, 시뮬레이션 센터를 설립하고 있다. 선진국의 응급의학분야에서 응급구조사의 역할이 매우 중요하게 대두되고 있으며, 한국에서 응급구조사의 효율적인 교육과 역할 수행을 위해 마네킹 시뮬레이터를 이용한 교육이 매우 중요하다. 본 연구는 이러한 의학 분야 시뮬레이션이 의과대학 교육뿐 아니라 구조구급 분야에 종사하는 소방공무원, 간호사, 응급구조사 양성 교육 등 의료의 여러 영역에서 다양하게 이용되는 의료시뮬레이션 진화와 교육에 대해 소개하고자 한다.

• 보존과학회지
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• 제29권1호
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• pp.25-33
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• 2013

전통 단청 교착제인 젤라틴(아교)의 물성에 따른 단청 도막의 성능을 평가하고자 직접 추출하거나 시판되는 아교 및 젤라틴 5종을 선정하고 수분반응성과 촉진내후성을 실험하였다. 실험결과, 겔 강도가 높은 1종의 젤라틴 단청 도막에서는 아교 대체 재료인 아크릴산 에스테르 수지 도막보다 수분 흡수율이 높고 촉진 내후성 시험 후에도 밀착성이 높았을 뿐만 아니라 젤라틴 도막보다 내수성이 우수하였다.

• Journal of Electrical Engineering and Technology
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• 제13권2호
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• pp.911-917
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• 2018

Influence of the adaptors on the calibration of $100{\mu}H$ inductance standard was studied as a function of torque, applied when tightening the standard inductor terminal with the adaptor. Two different homemade adaptors of BPO gold-plated brass (BPO-Au) and banana-copper (BN-Cu) were made for the connection between the LCR meter and the inductance standard. The measured inductance (L) of the standard inductor and the contact resistance ($R_C$) between the adaptor and the standard inductor terminal showed exponential decreases against the torque increase from $25cN{\cdot}m$ to $150cN{\cdot}m$. The measured L and the calculated equivalence series resistance ($R_S$) were dependent on the adaptor type as well as on the $R_C$. The results of the adaptor analysis imply that the BPO-Au adaptor with the lower $R_C$ is more suitable for the inductance calibration. The calculated inductance of $99.956{\mu}H$ corrected by subtraction of the adaptor inductance and the contact resistance contributions from the measured value using the BPO-Au adaptor agreed well with the certificate ($99.948{\mu}H$) of the PTB within the measurement uncertainty of $140{\mu}H/H$.

• Current Optics and Photonics
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• 제1권5호
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• pp.525-528
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• 2017

High-energy, high-power, quasi-continuous wave (QCW) operation of double-clad Yb fiber lasers incorporating an incoherent signal combiner is reported. We constructed four efficient, high-power Yb fiber lasers, each of which produced rectangular pulses at 1080 nm with a pulse energy greater than 15 J, and a pulse duration of 10 ms at a repetition rate of 10 Hz, corresponding to an average power of over 150 W and a peak power of over 1.5 kW for ~200 W of incident pump power at 915 nm. These laser outputs were combined by a homemade incoherent fiber signal combiner with low loss, yielding a maximum peak power of ~6.0 kW in a beam with $M^2{\approx}12.5$. The detailed laser characteristics and prospects for further power scaling in QCW operation are discussed.

• 한국수소및신에너지학회논문집
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• 제27권2호
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• pp.144-154
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• 2016

HT-PEMFC (high temperature polymer electrolyte membrane fuel cell) using PA (phosphoric acid) doped PBI (polybenzimidazole) membrane has been researched for extending the lifetime. However, the existing work on durability of HT-PEMFC focuses on identifying degradation causes of lab scale. The short life time of HT-PEMFC is still the problem for its commercialization. In this paper, an operating method to maximize life time of 5kW HT-PEMFC stack are proposed. The proposed method includes major steps such as minimization of OCV (Open Circuit Voltage) exposure, control of the proper stack temperature, and N2 purging for the stack. This long life operating method was based on the fragmentary results of degradation from previous research works. Experimentally, the 5 kW homemade HT-PEMFC stack was operated for a long time based on the proposed method and the stack successfully can operate within the desired degradation rate for the target life time.