• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.377-379
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• 2012

새천년대교 건설을 위하여 설치된 공사용 구조물, 작업용 선박 및 바지선 등 새로운 항행장애물 발생으로 인하여 항행여건이 더욱 열악하게 됨으로써 해양사고 발생 가능성이 증가하고 있어 이에 대한 안전대책을 수립 시행하여 해양사고를 예방하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.11a
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• pp.105-107
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• 2011

국내의 플로팅 건축 사례의 경우 철근콘크리트 보다는 바지선과 같은 형식의 폰툰이 주로 사용되고 있다. 반면 유럽의 경우 철근콘크리트 폰툰의 사례가 많고 상대적으로 많은 장점을 갖고 있는 것으로 알려져 있다. 유럽 사례를 통해 철근콘크리트 폰툰의 유형을 구분하고 상부시설과의 상관성을 분석함으로써 플로팅 건축 계획에서 계획방법론으로서 활용 가능성을 검토 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.449-450
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• 2013

MARPOL 협약에 따르면 400톤 이상의 모든선박은 협약증서를 비치해야 한다. 기관이 미탑재 되거나, 선원이 없이 무인/무동력으로 운항되는 바지선의 경우 해양오염의 위험성이 크지 않다. 이 연구에서는 효율적인 MARPOL 협약의 적용을 위해 증서 비치 면제가 필요한 선박을 식별하여 각 부속서를 개정을 제안한다.

• Journal of the Korean Society of Clothing and Textiles
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• v.25 no.10
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• pp.1791-1800
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• 2001

연구의 목적은 지체장애인들의 신체적 특성을 고려하여 움직이기 편하면서 외관이 보기 좋은 기능성 의복을 제작하는데 있다. 휠체어, 크러치를 사용하는 여성 장애인을 대상으로 쟈켓, 바지, 휠체어 랩을 제작하여 외관상 기성복과 차이가 나지 않으면서 보조기구를 사용하는데 불편함이 없는 디자인을 제시하였다. 연구의 결과는 다음과 같다. 첫째, 휠체어사용자 쟈켓은 어깨와 팔의 동작을 쉽게 하기 위해서 뒤 bodice 소매둘레부위에 artion pleats를 주었으며 팔꿈치 부위에 주름으로 처리하여 당김과 움직임을 수월하게 하였다. 바지는 허리선 위치를 수정하고 굽혀져 있는 무릎부위에 앞은 주름, 뒤는 다아트로 처리하였다. 둘째, 크러치 사용자는 전체적으로 외관이 올라간 것처럼 보이는 것을 막기 위하여 쟈켓 길이를 길게 하고 쟈켓 위에 조끼를 덧입은 것처럼 보이게 하였다. 바지의 허리선은 고무벨트를 달았으며 양쪽 옆트임을 하여 지퍼를 달았다. 셋째, 휠체어 랩은 방수와 방한을 대비하여 만든 옷으로 전체적인 외관이 롱 원피스 형이며 발부위에 사각형 발판을 만들어 바람이 들어오지 못하도록 하였고, 양쪽 옆 지퍼를 사용하여 여밈 처리하였다.

• Explosives and Blasting
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• v.36 no.2
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• pp.27-35
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• 2018

This study introduces a suggested underwater blasting method in contrast with conventional underwater blasting methods which adopt the drilling and charging procedures by divers. A structural underwater charging system makes it possible to drill into underwater bedrock and charge explosives on the deck of barge ship. The applicability and effectiveness of the suggested method was experimentally approved by comparing with a kind of underwater charging system as a conventional underwater blasting method.

• Journal of the Society of Naval Architects of Korea
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• v.54 no.3
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• pp.196-203
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• 2017

In general, the installation of offshore wind turbine have been carried out by a jack-up barge or wind turbine installation vessel. In case of using jack-up barge, an additional barge is required to transport offshore wind turbines. During the transportation, barge is affected by environmental conditions such as wave, wind etc. So, it is important to secure the static and dynamic stability of the barge. In this study, fundamental research was performed to evaluate the stability of barge due to use the guide frame. The analysis for static stability of barge was performed under the two loading conditions with or without wave and those results were evaluated according to the Ministry of Oceans and Fisheries rules. Also motion analysis was performed under the ITTC wave spectrum using buoy data and evaluated based on NORDFORSK guideline by using commercial software Maxsurf Motions.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.6
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• pp.681-689
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• 2012

In this study, we performed a simulation of the dynamic response of a multibody system to calculate the tension acting on wire ropes connecting floating cranes and a heavy cargo such as a Giga Block weighing over 5000 tons when the cargo is salvaged using parallel connected floating cranes. In this simulation, we supposed that the motion of the floating cranes, barge ship, and heavy cargo has 6 degrees of freedom and that the interaction is determined by constraints among them. In addition, we considered independent hydrostatic and hydrodynamic forces as external forces acting on the floating cranes and barge ship. The simulation result can be a basis for verifying the safety of construction methods in which heavy cargo is salvaged by parallel connected floating cranes, and it can also be used to guide the development of such construction methods.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.25 no.4
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• pp.236-243
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• 2013

Offshore wind turbines has to be proved against accidental events such as ship collision. In this study, ship collision fragility analysis of offshore wind turbine is done. Dynamic collision analysis is accomplished by considering soil foundation interaction and fluid structure interaction. Uncertainties due to ship weight and speed, angle are also considered. By analyzing dynamic response of offshore wind turbine, fragility curves are obtained for different damage levels. They can be used for restricting boat speed around the wind turbine and allowable size of the boat for inspection and for other purposes. Results of the fragility, it was confirmed fragility of collision speed of bulk ship of 30,000DWT and 850ton barge ship.

• Journal of the Korean Society of Marine Environment & Safety
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• v.17 no.2
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• pp.179-185
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• 2011

A marine collision accident occurred at the Jin-do water way. A barge loaded with heavy equipment of Power Generation Plant was being towed at its side by two tugs "A" and "B" from Byeg-pa harbour to the designated position to be used for power generation plant near Jin-do bridge. The Power Generation Plant was 40-meters high loaded atop the barge. When the "tugs and tow" were approaching the Jin-do the bridge, the two towing tugs lost maneuvering control of the barge and it went off-course, hit first the waterway embankment and finally struck the lower part of bridge's span and post musing the barge to capsize and sunk its cargo into the sea. The bridge also suffered damages where the top of the Plant struck At the time of the accident, there was a strong tidal current at the waterway. This paper calculates the safe towing force of barges with heavy loads when traversing in a strong tidal current situation in narrow waterway.

• Aerospace Engineering and Technology
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• v.5 no.2
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• pp.143-148
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• 2006

This article summarizes the results of sea transportation load measurements, which will be used as the reference to the sea transportation environment condition for the launch vehicle of KSLV-I. KSLV-I will be transported by Sea from Pusan to the NARO space center in Gohung, Chunnam province. Since the vibration load condition during sea transportation is considered as one of the important design parameters of KSLV-I and its transportation means, it is necessary to directly measure the environmental condition of sea transportation loads prior to establish the sea transportation plan in detail. This material includes the measured data of 3-axis linear accelerations and 3-axis angular rates on the board of a barge-ship, which is towed by a tug boat during shipping operation. This barge-ship is same class with one which will actually carry KSLV-I. The results show that the measured load condition during sea transportation is not severer than the reference data of MIL-STD-810F and Zenit-3SL launch system.