• Journal of the Korean Chemical Society
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• v.38 no.2
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• pp.169-173
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• 1994

The previously reported cytotoxic metabolites, against the KB cell line, xestoquinone, halenaquinol sulfate and $halenaquinol^{5,6}$ were isolated from the unidentified sponge collected in October 1992, Manado Bay, Sulawesi in Indonesia. Their structure were elucidated by $^1H-,\;^{13}C$-NMR, $^1H-,\;^{13}C$(1 bond) Heteronuclear Multiple Quantum Coherence Spectroscopy$(HMQC)^1$, $^1H-,\;^{13}C$C(2 and 3 bond) Heteronuclear multiple Bond Correlation Spectroscopy$(HMBC)^2$, Electron Impact Mass Spectroscopy(EI ms), Ultraviolet Spectroscopy(UV), and Infrared Spectroscopy(IR)

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05d
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• pp.95-100
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• 1996

현재 방사선 비상훈련에 사용하는 TID-14844 의 방사선원항은 너무 보수적이고, 각 사고경로별로 방사선원항의 특성을 나타낼 수 없으므로, 원전의 비상사고 발생시 주민의 피폭선량을 최소화하기 위한 발전소 요원의 신속, 정확한 대처능력을 배양하기 위하여 현실적인 방사선원항 평가자료의 필요성이 대두되어 왔다. 본 연구에서는 보수성을 배제한 최적 분석기법을 이용하여 선정된 사고경로에 대해 MAAP 전산코드로 사고진행 및 방사선원항을 분석하였고, 격납건물내 방사선계측기의 예측치를 평가할 수 있는 방법론을 개발하였으며, 이를 통해 사고경로별 안전변수 및 방사선 계측기 등에서의 사고 진행에 따른 예측치 등을 계산함으로써 효과적인 비상대책 수립을 위한 실질적인 방사선원항 데이타 베이스를 구축하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2002.05a
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• pp.334-341
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• 2002

As the interest in internet business increases, effective web site evaluation is in order. While web site evaluation is supposed to be based on feasible applicability and trust-worthy criteria. many researches on web site evaluation fails to rover the various business models and consider corporate-activity-related features. Besides, dealing with the limited aspects such as design and cognitive science is something to be desired on the previous researches. Therefore, This paper presents internet web site evaluation framework not only based on existing researches and analysis but also reflecting corporate strategies. The framework includes web sites contents, design, operation and management-related factors, and it is applied to companies to validate its applicability.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.10
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• pp.873-878
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• 2013

An EOTS (Electro-Optical Tracking System) provides stabilized images while tracking a moving target. This paper presents a novel concept of driving the outer gimbal first for improving the maneuverability of an EOTS, contrary to the conventional inner gimbal mode. It has the advantages of faster positioning performance and stable operation in Nadir-point. Analysis of frequency responses reveal that the present scheme results in a wider control bandwidth and larger gain margin, compared to those of the previous one. The actual experimental results confirm that the maneuvering is stable although the input command has a large angular acceleration.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.10a
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• pp.163-164
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• 2015

This paper analyze a pattern and a cause of safety accident occupied in work filed of container terminals, calculate risk index considering accident frequency and severity, and then provide the relative risk assessment. Based on this, this paper provides the priority of risk reducing method in container terminals, proposes the risk management plan.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2000.11a
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• pp.199-202
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• 2000

Compared with existing construction materials, ACM(Advanced Composites Material) possesses many advantage such as light-weight, high-strength, corrosion resistant properties, etc. In this study, utilizing those advantages of ACM, composite skin and comer plate for protection of concrete port structure are developed. Detailed procedure fur analysis, design and fabrication along with site installation for demonstration project are described. It is also demonstrated that pultrusion process for comer plate and VARTM process for composite skin are promising fabrication methods fer future civil infrastructure application.

• Journal of the Korean Chemical Society
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• v.39 no.4
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• pp.301-305
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• 1995

The cytotoxic metabolites, against the KB cell line, halenaquinone, epispongiatriol and aldisin were isolated from the sponge Spongia sp. collected in September 1992, Manado Bay, Sulawesi in Indonesia. Their structures were elucidated by 1H, 13C NMR, 1H 13C(1 bond) Heteronuclear Multiple Quantum Coherence Spectroscopy (HMQC), 1H 13C(2 and 3 bond) Heteronuclear Multiple Bond Correlation Spectroscopy (HMBC), Electron Impact Mass Spectroscopy (EI ms) and Infrared Spectroscopy (IR).

• Proceedings of the KIEE Conference
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• 2007.04b
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• pp.114-116
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• 2007

우리나라는 에너지자원의 해외의존도가 높고 에너지다소비 산업구조를 가지고 있으며 또한 국제유가 등락에 따라 경제가 큰 영향을 받으므로 이에 대한 대처방안으로 합리적인 에너지 이용효율개선과 범국민적 에너지절약의 중요성 갈수록 높아만 가고 있는 실정이다. 에너지절약을 위하여 고효율 변압기를 채택하는 방법도 전력용변압기의 효율적 이용방안중의 하나이므로, 본 연구는 국내 전력용변암기의 평균연간 부하율을 도출하여 합리적이고 타당성 있는 고효율변압기 기술기준안 작성을 위한 자료제공을 목적으로 수행되었으며, 연구결과 도출된 내용은 국내 전력용변압기의 최저효율제 국내기준 마련 둥 변압기 관련기준안을 검토 보완하는데 활용할 수 있을 것으로 기대된다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.10
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• pp.130-135
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• 2010

In this paper, the shading ratio about to output the minimum critical power of a photovoltaic panel was determined by experiment and simulation. A 2.475[kW] poly-crystalline photovoltaic panel consisting of 11 modules was used in the experiment and its surface was covered with shading curtains, thus the amount of light incident to the modules were controlled. In order to compare with the experimental results, the experimental circuits were modelled with the CASPOC (power electronics electrical drives simulator) and module parameters were applied to it, by which the minimum critical power was calculated. As a result, the photovoltaic panel was about to generate the power when the 5th shading curtains were removed from the module surface, after then the output power linearly increased by removing the shading curtains. In addition, the CASPOC simulation results were similar to the experimental results in the abrupt decreasing pattern of power.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.509-511
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• 2013

통영항에 5,000DWT급 여객선과 일반화물선이 이용 가능한 다목적부두 건설을 위해 해상교통현황 조사 및 측정, 통항 및 접 이안안전성, 계류안전성 등과 같은 해상교통안전진단을 실시하였다. 연안항으로 지정 운영되고 있는 통영항 다목적부두의 안전진단 수행 과정에서 부각된 항만 및 수역시설에 대한 안전관리 체계의 미비점, 전담 부서의 부재, 임의도선구의 문제점 등을 고찰하고자 한다. 특히 국내 연안항 항만개발 사업의 대부분이 해당 도 시 군이 직접 시행하는 경우가 많아 항만개발과 수역시설의 안전관리사이의 공백이 발생하고 있어, 향후 연안항 안전관리체계 전반에 대한 구조적 개선이 필요할 것으로 사료된다.