• Journal of the Society of Disaster Information
• /
• v.3 no.2
• /
• pp.79-93
• /
• 2007

With international urgence of terror situation, many methods of terror techniques and skills are appearing and more intense and threatening terror is braking out not only in the air(plane), but also in the sea(ship). Korea is surrounded by 3 sides of sea and is a proud maritime nation that should advance to foreign country through the sea because South Korea and North Korea are confronting. Korea depend on the maritime transportation, 99.7% of exporting, importing material resources. Therefore, acquisition of the marine safety has the great affect on national security and economical life. On the high tension of situation about threat and possibility of maritime terroism, the potential ways of the improvement policy for counter-tactics against big maritime terror are the following. First, we should construct clear and well-organized network for accurate information about maritime terrorism Second, we should have the information of all domestic, foreign passenger's ships Third, national important facilities such as atomic energy plant, thermo-electric power plant, shipyard need policies to manage all emergency situation Fourth, government authorities should improve tactic abilitities by competing with support and budget inside of nation as well as outside of nation. To develop big maritime terror of our country, we will have to hold cooperative training & tactics contest of big maritime terror by cooperating educational industry organization with similar institute, improve the ability of members of big terror and acquire tactics information by excavating and exchanging a new technique through tactics seminar and public hearing.

• Journal of the Society of Naval Architects of Korea
• /
• v.55 no.4
• /
• pp.361-369
• /
• 2018

The ship surveyor makes a scheme of reasonable ship operation by examining whether the ship has been properly constructed in accordance with the rule of classification societies and international conventions or whether the facilities of the ship in operation meet the standard stipulated by law. Even though the ship surveyors of classification society generally consist of people who have the skill of design or operation of a ship, it takes a long time to train a surveyor to the maturity level. This paper describes the development of survey simulator based on virtual ship environment that enables the surveyor minimize trial and errors to survey the ships. By using VR(Virtual Reality) based survey simulator, surveyors possibly achieve improvement of competence in survey quality by means of safe and immersive training environment. In order to improve the usability and utility of the VR simulator, the ship 3D model has been generated using 3D CAD model for design and production in shipyard. Through this, we suggested the possibility of consistent use of 3D model as the digital twin of a ship.

• TTA Journal
• /
• s.126
• /
• pp.24-29
• /
• 2009

IT조선 융합의 목적은 조선산업에 IT기술을 접목해 조선산업의 초인류화를 달성하여 향후 5~10년 후에도 조선강국을 유지하고자 하는 데 있습니다. 이를 위해 정부에서는 제품의 고기능화 및 제조업의 고부가가치화를 위해 IT산업의 주력산업과 융합을 통한 10대 전력산업 중심의 이행계획으로 'IT융합 발전 전략'을 마련했습니다. IT조선 융합 분야에서는 IT융합을 통한 선박건조(Digital Shipyard), 선박통합통신망(SAN)이 적용된 지능형 선박(Smart Ship), 항로최적화 등을 위한 선박운항 기술개발 등이 고려될 수 있습니다. 국제적으로 EU, 미국, 일본 등에서 대형 프로젝트를 통해 기술개발을 완료하고 e-Navigation 정책의 국제적 합의 도출을 기다리는 상황입니다. e-Navigation은 선박의 안전항해를 실현하기 위한 방법으로써 선박에 사용되는 IT기자재의 표준화와 항해사의 의사결정을 도울 수 있는 도구 개발에 핵심을 두고 있습니다. 이를 위해 선내 모둔 기자재는 네트워크에 연결되어 선박의 항행정보와 선박기자재의 운전정보 등이 실시간으로 모니터링 되고 용이하게 제어되어야 하며, 이러한 정보는 육상에서도 모니터링 되고 필요시 육상에서 항해사의 의사결정을 도울 수 있어야 합니다. 정보교환을 위해서는 선박과 육상(Ship-Shore), 선박과 선박(Ship-Ship) 사이에 끊임없고 신뢰할 수 있는 통신채널이 유지되어야만 가능합니다. 이를 기반으로 e-Navigation의 최종 실현목표인 해양환경보호 및 항해 안전과 선박의 안전을 달성할 수 있으므로 표준화 분야도 이 범주 내에서 이루어져야 할 것입니다.

• Korean Journal of Computational Design and Engineering
• /
• v.9 no.4
• /
• pp.406-415
• /
• 2004

The industrial environment for shipbuilding in 21st century requires increase in few type of ships and marine structures, international cooperation and globalization, while virtual enterprise environment is rapidly establishing. On the other hand, more and more efforts will be spent on internet based distributed and collaborative environment rather than being spent on unit level automations such as CAD, CAM and CAE, and the link between them. Recent internet technology and information technology in heterogeneous environment are being applied in shipbuilding industry as well as in other industries. While these technology are rapidly adopted in major shipyards, many small and medium-sized shipyards does not have enough resources to introduce system designed for large enterprise. In this paper, a prototype of Internet technology based basic planning system is implemented for the small and medium sized shipyards based on the internet technology and concurrent engineering concept. First, the system is designed from the user requirements. Then standardized development environment and tools are selected. These tools are used for defining and evaluating core application technologies for the system development. This can guarantee the survival of small and medium-sized shipyards in 21st century industrial environment.

• Journal of Korean Society for Atmospheric Environment
• /
• v.30 no.6
• /
• pp.569-576
• /
• 2014

In this research, a few paints in the shipyard were selected and analyzed for the component and ozone production in marine paint using TVOC and GC/FID, ozone generation index (MIR, POCP) to establish measures of $VOC_s$ effectively. The concentrations of TVOC ranged between approximately 300~400 g/L and 400~500 g/L, respectively and these showed 37% of whole. Our results indicated that the main constituents of marine paints were m,p,oxylene (49%), ethyl benzene (10%), toluene (8%) and 2-propanol (5%). It was also found that xylene concentration have relatively higher impact on ozone generation. The types of paints were also investigated for their potentials. The biggest contributor was the 1 Pack Finish paint. The rest is, in their contributing order, 1 Pack Finish paint, 2 pack Finish paint, Anti-fouling paint, 2 Pack A/C paint, Ballast paint and 1 Pack A/C paint.

• Molecular & Cellular Toxicology
• /
• v.4 no.3
• /
• pp.230-234
• /
• 2008

Epidemiological studies demonstrate an adverse effect of several environmental and occupational exposures on male sex hormone. Bisphenol A (BPA) is a weak estrogen and a widely used industrial chemical. Epoxy resin painters may be continuously exposed to BPA at high concentrations. The effect of occupational exposure of BPA on male reproduction was examined by measuring the urinary BPA, testosterone and gonadotropic hormones of epoxy resin painters in the shipyard. The painters had significantly higher concentrations of urinary BPA (2.61${\pm}$1.08 ${\mu}g$/g creatinine) than controls (1.38${\pm}$0.5 9 ${\mu}g$/g creatinine). In serum, the testosterone level of painters was significantly decreased but the luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels of painters were significantly higher than controls. Occupational exposure to BPA influences testosterone and gonadotropic hormones in male workers.

• Journal of Welding and Joining
• /
• v.24 no.5
• /
• pp.62-66
• /
• 2006

Panel line is an important process occupying the largest work amount in shipbuilding. In this research product simulation has been carried out to establish the optimal production scheduling. For this purpose a web-based panel line simulator was developed using an object modeling technology and C# language. The balance of work-load and increase in the productivity by the improvement of production facilities and process are the key factors for a good scheduling. In this study SPRT(Shortest Remaining Process Time) rule was applied for the work-load balancing and a good result achieved. To increase the productivity in the stiffener welding stage which is a bottleneck; process, more welding heads and higher welding speed were tested using the developed simulator. The simulation results showed that either more welding head or higher welding speed decreased the total work time. Use of both, however, deteriorated the productivity because of the bottleneck in the following stage. This result points out that the improvement of production facilities and/or process should be evaluated with their influences on the leading and following processing stage.

• Journal of Welding and Joining
• /
• v.34 no.1
• /
• pp.47-53
• /
• 2016

WPS/PQR is the essential documents for shipbuilding welding. WPS is the document containing the information related to welding procedure and PQR is the record of approval for welding procedure. Both documents should be approved by the ship owners and the classification societies. It is very important to manage these documents because the welding procedure using these documents could not be carried out before they are approved. Database is an useful tool to manage these documents. It can manage a number of documents and show the processing status of WPS/PQR documents. In this study, all documents related to WPS/PQR documents were investigated and analyzed in the viewpoint of DB. An appropriate DB system was designed for WPS/PQR and the related documents on the basis of CBD methodology. The DB system could make WPS/PQR documents easily and shortly. The grasp of the processing status of WPS/ PQR could help the good management of fabrication schedule in shipbuilding.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2005.05a
• /
• pp.348-352
• /
• 2005

본 논문은 조선소에서 계획기간동안 각 플랜트의 생산일정에 따른 블록의 모든 수송요구량이 미리 알려져 있는 정적인(static) 수송환경을 고려한 트랜스포터 일정계획문제를 다룬다. 조선소 내에서 블록들의 수송은 몇 가지 특성을 가진다. 500톤을 초과하는 거대 블록들은 2대 이상이 결합된 새로운 형태의 트랜스포터를 이용하여 운반된다. 운반이 요구되는 블록들 중 일부는 계획기간동안 규정된 출발요구시각에 pick-up되기를 요구하는 반면 나머지 블록들은 계획기간동안 규정된 도착요구시각 전에 delivery되기를 요구한다. 이러한 트랜스포터의 결합 및 시간 제약은 문제를 더욱 복잡하게 하는 요인이 된다. 본 논문에서는 계획기간 내에 모든 블록운반 요구사항들(출발지와 도착지, pick-up과 delivery 시각, 톤수, 결선 등)을 만족시키는 트랜스포터 일정계획문제를 다룬다. 트랜스포터 일정계획문제에서 중요한 주제는 총 로지스틱스 시간 (공차운행시간, delay 시간 및 tardy 시간)을 최소화하기 위해 계획기간 내에 최소의 트랜스포터 운영대수로 각 트랜스포터에 어떤 블록을 할당하고 어떤 순서로 운반할 것인 지를 결정하는 것이다. 이에 본 논문에서는 주어진 트랜스포터 일정계획문제를 해결하기 위해, 1단계에서 최소비용 네트워크 흐름문제를 근간으로 트랜스포터의 최소사용대수를 구하고 이를 기초로 2단계에서 각 트랜스포터에의 블록 할당과 운반순서를 결정하는 2단계 휴리스틱 알고리즘을 제안한다.

• Korean Journal of Computational Design and Engineering
• /
• v.13 no.1
• /
• pp.36-44
• /
• 2008

This paper proposes a modeling and simulation process of a panel production line (PPL) in a shipyard. The panel production line is an assembly process to produce a main panel of a flat block and a curved block. In this paper, its activity analysis is carried out using expression of IDEF0, and its process is qualitatively and quantitatively analyzed and modeled by Petri Nets. A commercial discrete event simulation tool, $QUEST^{TM}$, is used for virtual PPL and simulation. The modeling results by Petri Net are mapped to elements of the simulation tool. Finally, an integrated simulation environment of PPL is implemented in order to efficiently utilize the virtual PPL model. With the help of IDEF0 and Petri Nets, we could systematically analyze and describe the PPL process that are characterized as being concurrent, asynchronous, distributed, parallel, nondeterministic, and/or stochastic. Also, the dynamic and concurrent activities of a PPL system were able to be simulated. A timing concept can be included into the Petri nets model to evaluate performance and dependability issues of the system.