• 한국항해항만학회지
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• 제32권7호
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• pp.537-542
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• 2008

A lot of cargo accidents occurred due to insufficient securing in the case of marine transportation. If the residual tension of securing rope can be predicted, it will be very useful in the handling of cargo securing work of operators. It was confirmed in the previous study that the fluctuation tension cf securing rope by oscillation could be predicted. In this paper, in order to the prediction of residual tension of securing rope, the experiments were carried out to measure the residual tension of securing rope under the oscillation and cyclic loadings. The residual tensions of two tests were in good agreement with each other. It can be predicted through the cyclic loading test in the estimated fluctuation tension without oscillation test by ship motion simulator.

• 해양환경안전학회지
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• 제21권3호
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• pp.297-302
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• 2015

To prevent cargo accidents by repeated loads, a continuous monitoring for securing rope or additional safety measures are needed, but most of prevention measures have been conducted only by operator's own experience not a quantitative assessment. Hence, the Load-Displacement curve and approximation formula of securing rope were drawn in this research for a quantitative assessment and simplified measurement on a tension of securing rope using a tensiometer. Moreover, a com parison was conducted between m easuring tension and calculated tension on securing rope with portable tensiometer, 'Load-Displacement' approximation formula. The calculated tension of securing rope is obtained 153.3kfg using the formula and that result has not much difference with initial tension 150.0kgf. Lastly, an analysis of the characteristics of various ropes was suggested to enhance the reliability about quantitative assessment of securing rope's tension through further research.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 춘계학술대회 논문집
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• pp.181-186
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• 2005

파랑중을 운항하는 선박은 항상 파도의 영향을 받아 운동을 하게 된다. 특히 컨테이너선과 같이 갑판위에 화물을 많이 운송하는 선박의 경우에는 여러 방향이 운동형태 중에서 횡동요가 화물의 안전에 가장 큰 영향을 미친다. 이러한 선박에서는 컨테이너의 이동 및 전도를 방지하기 위하여 Securing과 Lashing을 하게 되는데, 적절한 시스템의 선정을 위하여 각각에 작용하는 하중들의 정확한 평가가 요구되고 있다. 따라서 본 논문에서는 갑판적 컨테이너들의 연결부에 작용하는 Securing 하중과 Lashing 와이어에 작용하는 힘에 대한 계산식을 유도하고, 몇가지 Lashing 패턴에 대하여 계산을 수행하였다.

• 한국항해항만학회지
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• 제29권5호
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• pp.377-382
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• 2005

파랑중을 운항하는 선박은 항상 파도의 영향을 받아 운동을 하게 된다. 특히 컨테이너선과 같이 갑판위에 화물을 많이 운송하는 선박의 경우에는 여러 방향의 운동형태 중에서 횡동요가 화물의 안전에 가장 큰 영향을 미친다. 이러한 선박에서는 컨테이너의 이동 및 전도를 방지하기 위하여 Securing과 Lashing을 하게 되는데, 적절한 시스템의 선정을 위하여 각각에 작용하는 하중들의 정확한 평가가 요구되고 있다. 따라서 본 논문에서는 갑판적 컨테이너들의 연결부에 작용하는 Securing 하중과 Lashing 와이어에 작용하는 힘에 대한 계산식을 유도하고, 몇 가지 Lashing 패턴에 대하여 계산을 수행하였다.

• 기술사
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• 제44권2호
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• pp.39-42
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• 2011

The main concern at the moment is securing rare earth(RE) resources, because the RE is the essential elements in green technology such as hybrid car, wind power plant, LED, display etc. It's impossible Korea will be a advanced country without securing RE. The importance of investment radically in the securing RE resources and professional engineers can not be overinvested.

• Journal of Advanced Research in Ocean Engineering
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• 제2권3호
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• pp.112-128
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• 2016

Capsize and sinking of a coastal car ferry has occurred in a Korean offshore area and has caused hundreds of human casualties. The rapid turn and improper cargo loading are inferred as the main reasons of the accident. It has motivated to develop a new system of cargo securing with improved safety of Korean coastal ferries. This paper provides a new approach regarding cargo securing safety assessment which is purely based on force equilibrium conditions, because IMO CSS is suitable for the ocean-going vessels. The mathematical formulations are presented for the new approach. This paper also introduces a newly developed safety assessment system based on the new approach. Most outstanding features are that it can utilize acceleration data produced from hydrodynamic motion analyses or assumed maximum extents of ship motion components and that securing safety assessment is simultaneously possible for unlimited number of cargoes with finite number of lashings.

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2003년도 춘계학술발표대회논문집
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• pp.80-85
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• 2003

오늘날 USIM 서비스는 그 중요성과 사용자 요구에 의해 시장규모가 나날이 증가되어 가고 있는 추세이다. 본 논문에서는 USIM 서비스의 핵심 기술이라 할 수 있는 보안메카니즘 중 3GPP TS 23.048 과 자바카드 규격에 따라 IMT-2000 에 장착된 USIM 서비스를 지원하기 위한 Securing Message 전송 기술에 관하여 연구하였다.

• 대한조선학회논문집
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• 제51권5호
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• pp.362-368
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• 2014

Container vessel sizes have constantly increased over the past two decades. With increasing ship sizes and higher container loading capacities, the adoption of lashing bridges has also increased. Today's lashing bridge designs range from 1st tier to 3rd tier lashing bridges. Container securing program of the past which is based on two lashing rods and 1st tier lashing bridge has to be improved to be suitable for the present time. The equilibrium equations in this study are established to cover the application of 3~4 lashing rods and 2nd~3rd tier lashing bridges. In addition developed program is improved to be able to calculate the reaction forces and optimum arrangement under the external lashing. An optimization algorithm which is suitable for the container securing problems involved the equality constraint has been also adopted in this study.

• 한국항해항만학회지
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• 제27권4호
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• pp.397-402
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• 2003

컨테이너 시큐어링 시스템은 컨테이너 운반선 상갑판에 적재되는 컨테이너의 배치 설계를 위한 시스템이다. 컨테이너의 배치는 각 선급의 가이드라인에 기초하여 설계되어지며, 주어진 배치에 따른 반력들과 변력의 한계값을 제공하고 있다. 컨테이너 설계를 위해서는 컨테이너 구속 교량(lashing bridge)과 수직 구속 장치(vertical lashing) 등을 고려해야 하며, 최대 수직 중량 중심(vertical center of gravity, VCG)과 최대 화물 중량(stack weight)을 갖는 배치안을 제시할 수 있어야 한다. 본 연구에서는 이를 위한 평형방정식을 정립하였으며, 배치안 계산을 위해 등식 제한조건(equality constraint)을 처리할 수 있는 최적화 알고리즘을 적용하여 새로운 컨테이너 시큐어링 시스템을 개발하였다. 개발된 시스템은 컨테이너 배치 설계 시간을 크게 줄여주며, 설계자가 원하는 배치 설계안을 제시해 준다.

• 한국농공학회논문집
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• 제61권2호
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• pp.25-39
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• 2019

The water pollution Accident in the South Han River is increasing due to increase of pollutants inflow from small streams from rural areas and reduced flow rate. This study predicted the change of water quality in the main stream of the South Han River due to climate change through the linkage of watershed and water quality models. Also, This study analyzed the effect of water quality improvement on Seomgang and the South Han River by securing the flow during the dry season. According to the scenarios for securing the river flow during drought season, the river flow in the Seomgang is increased up to 2.19 times, and the water quality during the drought season was improved up to $BOD_5$ 20.5%, T-N 40.8%, T-P 53.4%. Also, the water quality of the main stream of the South Han River improved to 5.22% of $BOD_5$, 5.42% of T-N and 7.69% of T-P as the river flow was secured from the Seomgang. The result of this study confirms that securing the baseflow in the Seomgang according to the scenarios for securing the river flow during the dry season has a positive effect on the improvement of the water quality of the rivers in the main river of the Seomgang and South Han River. The results of this study will contribute to the establishment of reasonable management to improve the water quality of the main stream of the Seomgang and South Han River.