• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.4
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• pp.397-406
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• 2016

Diverse stakeholders engaged in design, construction, and operation and maintenance of offshore plants typically operate heterogeneous plant 3D CAD systems. Engineering, procurement, and construction (EPC) companies are required to submit plant design result to the owner in the form of a plant 3D CAD model, as specified in the contract. However, because of the limitations of data interface of plant 3D CAD systems, EPC companies frequently perform manual remodeling to fulfill the terms and conditions of the contract. Therefore, comparison should be performed between the source plant 3D CAD model and the remodeled plant 3D CAD model to prove the validity of the remodeled plant 3D CAD model. To automate the comparison process, we have developed a system for quantitatively assessing the similarity of the plant 3D CAD models. This paper presents the architecture and detailed functions of the system. In addition, experimental results using this system are explained.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.3 no.4
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• pp.705-714
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• 1999

Modem society is an information society. This study analyzed the present state of marine information system and the analytical framework showing the study about if it is possible to construct marine information network and marine information system service. The results of this study is as follow: First, developing and complete stage, marine informations organization must be constructed. Second, the marine information policy in future must be able to unify all the areas. Third, the marine information system in future must be able to unify all the information systems. fourth, marine information systems must consist of marine-travel area, fisheries area, marine industry area, port area.

• Journal of the Society of Naval Architects of Korea
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• v.47 no.3
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• pp.430-437
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• 2010

In this paper, we develop a shape design optimization method for thermo-elastoplasticity problems that is applicable to the welding or thermal deformation problems of ship structures. Shell elements and a programming language APDL in a commercial finite element analysis code, ANSYS, are employed in the shape optimization. The point of developed method is to determine the design parameters such that the deformed shape after welding fits very well to a desired design. The geometric parameters of surfaces are selected as the design parameters. The modified method of feasible direction (MMFD) and finite difference sensitivity are used for the optimization algorithm. Two numerical examples demonstrate that the developed shape design method is applicable to existing hull structures and effective for the structural design of ships.

• Journal of the Korean Society of Marine Environment & Safety
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• v.7 no.2
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• pp.1-11
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• 2001

Many investments and works being continued to preserve green ocean in each countries of the world. Especial1y, the researches on the prevention of marine oil pollution being strengthened. It is not easy to disclose sludge oils that were produced necessarily in the ships operation, so that they are transferred to shore treating facility after collected inside the ship＇s sludge tank mostly. However, this shore transferring method is not only costly and time consuming but also entails risk of oil pollution. In this regard, it will be the best way to manage the sludge oils inside ship itself. The purpose of this study is to device an ultrasonic breaking systems which recycle the sludge oil from ships into usable oil to be burnt. In this paper, the first place, matrix structures of sludge fuel oil(SFO) and sludge lubricating oil(SLO) with the irradiation time for ultrasonic vibrator were interpreted. And, erosion damage for vibrator horn tip which is one of important part of ultrasonic breaking systems was examined under such an environment of the sludge oils. The material for horn tip is being made of SS41 steel and its erosion phase was investigated with variation of the vibration amplitude of 50${\mu}{\textrm}{m}$ and 24${\mu}{\textrm}{m}$ as well as the change of temperature in the oil environments. It is suggested that the experimental results can be helpful to the development of sludge oil disposing systems for the vessel.

• Journal of Fisheries and Marine Sciences Education
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• v.21 no.4
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• pp.568-575
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• 2009

On the conflict factors in using community fishing ground and their solutions, some conclusions are derived with the survey for fishing villages, residents, tourists as follows: Jeju Island has beautiful sceneries with seas in all the directions and so remarkable potential as personal experience fishing village. For sustainable development of ecological tourism in each fishing village, systematic, long-term development plans and management systems through decision making with residents in fishing and non-fishing villages are demanded. For tourist development of fishing village, protection management systems for marine and swampy land are needed first of all. Next, economical profit and the participation of resident have first priority, and also individual standards for each village are urgently prepared based on the results of basic research on each village. Finally, educations on environment and fishing village with professional tourist guide are needed. Ecological protection, environmental education, resident participation, local government's concern, and financial support could solve residential conflicts and make Jeju Island a Mecca of local fishing village tourism.

• Journal of Advanced Marine Engineering and Technology
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• v.25 no.5
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• pp.1017-1024
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• 2001

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2011.06a
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• pp.275-275
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• 2011

• Journal of Navigation and Port Research
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• v.33 no.8
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• pp.513-518
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• 2009

To prevent accidents and take immediate actions to minimize the damages caused by such disasters, there have been several information system related to marine transportation in or near harbour areas and coastal waters. However, those systems were operated independently and not able to exchange each others important data necessary for the cooperation of the relevant authorities in case of accidents. Standards of data formats and their exchanges needed to make information systems play efficiently their roles are proposed in this paper, and the proposed method is expected to help manage the marine transportation in the waters of jurisdiction and prevent marine accidents which cause huge amounts of casualties in the shipping industries and the natural environments.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.830-833
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• 2005

The diversification of the regulating system was promoted with the development of the computer technology. On the other hand, environmental problems and the energy conservation problem are being valued as for needs of the society. Our research was able to be achieved in such a situation.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.7
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• pp.875-888
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• 2018

The Government of the Republic of Korea has been continuously improving its legal system to ensure marine safety as a precaution against marine accidents. However, despite the ongoing improvement of the legal system, the number of maritime accidents has been increasing steadily, suggesting that the efficacy of the legal system is insufficient. As for recent marine accidents, small fishing vessels (less than 10 tons) account for 44.9 % of marine accidents over 5 years ('13_'17). Therefore, this study investigated the improvement status of the Korean government's legal system for small fishing vessels and the characteristics of related overseas legal systems in order to find a way to further improve marine safety for small fishing vessels. Following the results, the Korean government's laws related to small fishing vessels show a hybrid phenomenon due to the history of merging ('97) and separation ('09) of legal systems for fishing and non-fishing vessels, and it has been concluded that only improvements to construct additional facilities are being performed, and those in a fragmentary manner. In addition, overseas legal systems for small fishing vessels were confirmed to have requirements strengthening the responsibility of owners and operators of fishing vessels and introduced a self-inspection program. Based on these results, a plan is suggested to improve the efficacy of the legal system to ensuree marine safety for small Korean fishing vessels.