• Korean Journal of Computational Design and Engineering
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• v.6 no.3
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• pp.198-205
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• 2001

Under the concept of global economy, the enterprises are assigning design and production environments around the world in different areas. In shipbuilding companies, a serious problem of information exchange emerges as companies use traditional hardware and very distinct softwares appropriate to their field of expertise. To overcome the decreased productivity due to the interruption of information, the concept of simultaneous engineering and concurrent design becomes very significant. In this article, the concept of collaborative design based on internet environments is described. Especially, the core technologies to achieve collaborative design environments among shipbuilding companies, ship owners, ship classification societies, model basin, and consulting companies are adopted.

• Bulletin of the Society of Naval Architects of Korea
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• v.2 no.1
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• pp.3-8
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• 1965

The objects of this paper are to stimulated discussion of the criteria used for deciding the scantling of watertight bulkhead stiffener of steel fishing boats ranged of length of 20 meters to 80 meters and to suggest a method of calculation based on beam theory. Present knowledge is examined and it appears that failure of a bulkhead stiffener is comparatively rare. Regarding its structure bulkhead does not contribute on longitudinal strength of a ship. The strength of a bulkhead stiffener can be treated locally. Assuming bulkhead stiffeners are free ends and fixed ends theoretical required section modulus are calculated and compared with classification societies' rule. Welding effect of a bulkhead stiffener to bulkhead plate and a bracket to stiffener and deck plate are considered. On various conditions of joints are suggested.

• Journal of the Society of Naval Architects of Korea
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• v.29 no.3
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• pp.157-165
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• 1992

Three dimensional structural analysis is carried out to evaluate the global behavior of the platings for the watertight bulkhead and deep tank bulkhead of the selected model ship and to analyze the theoretical background of their formulations for the bulkhead platings in the Rules of each classification societies. In this study, coarse and fine mesh analysis for transverse bulkhead is carried out to know the stress distribution in way of the concerned areas and that result is presented to show the back data for the new formulations of such transverse bulkhead platings.

• Journal of Ship and Ocean Technology
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• v.12 no.1
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• pp.45-56
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• 2008

Recently, International Association Classification Societies (IACS) has adopted the Common Structural Rules (CSR) for Bulk Carriers and Tankers, which specifies the requirement associated with the ultimate strength of hull girder structure. The theoretical background and the results of verification study are neither well summarized nor released. Furthermore, the requirement is not a form of deterministic formula but a form of program in which source code is not disclosed. The reliability of the non-linear structural analysis program is verified through the comparison with the results of the analysis and the model test. Then, the reliability of the ultimate strength requirement in CSR is checked by comparing with the results of rigorous non-linear analysis.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2003.05a
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• pp.10-16
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• 2003

Under the concept of global economy, the enterprises are assigning design and production environments around the world in different areas. In shipbuilding companies, a serious problem of information exchange emerges as companies use traditional hardware and very distinct softwares appropriate to their field of expertise. To overcome the decreased productivity due to the interruption of information, the concept of simultaneous engineering and concurrent design becomes very significant. In this article, the concept oj collaborative design based on internet environments is described. Especially, the core technologies to achieve collaborative design environments among shipbuilding companies, ship owners, ship classification societies, model basin, and consulting companies are adopted.

• Journal of Ocean Engineering and Technology
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• v.18 no.6 s.61
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• pp.37-43
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• 2004

Under the concept of the global economy, the enterprises are assigning design and production environments around the world in various areas. In shipbuilding companies, a serious problem of information exchange has emerged as companies use traditional hardware and very distinct softwares that is tailored to their field of expertise. To overcome the decreased productivity resulting from the interruption of information, the concepts of simultaneous engineering and concurrent design become very significant. In this article, the concept of collaborative design based on Internet environments is described. Specifically, the core technologies necessary to achieve collaborative design environments among shipbuilding companies, ship owners, ship classification societies, model basin, and consulting companies are adopted.

• Journal of the Korean Institute of Navigation
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• v.23 no.4
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• pp.29-42
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• 1999

In the recent past, maritime safety research has been applied primarily to technological requirements and progression of regulations on standards of safety from which the ISM Code has resulted. Despite the engineering and technological innovations, significant marine casualties continue to occur, which indicates that human factors are an area requiring more focused attention. This paper aims to study the clear concept and its details of human factors in ship operating system through the investigation of researches presented so far. The purpose of studying human factors is to identify how the crew, the owners, the classification societies, and the regulatory bodies can work together to sever the chain of errors which are associated with every marine casualty. The human factors in ship operating system may be defined as the study and analysis of the interaction between the operator and system variables composing the system, most importantly the procedures and the crew and management follow.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.205-207
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• 2023

국제선급연합회(International Association of Classification Societies: IACS)에서는 2022년 선박 및 기자재시스템 사이버 복원력 달성을 위한 공통규칙 UR E26, E27을 발행하였으며, 이 규정은 2024년 1월 이후 건조 계약되는 선박에 의무적으로 적용될 예정이다. 현존선의 경우, OT 시스템 네트워크 변경 및 사이버보안 기능을 신규 구현하기가 어렵기 때문에 사이버 위험관리에 한계가 있으나, 본 규정을 통해 신조선 건조 단계에서 설계 보안 (secure by design)을 고려한 선박 사이버 복원력 네트워크 및 기능 구현이 가능하다. 사이버복원력 생태계가 잘 형성되기 위해서는 선주, 조선소, 제조사, 선급 등 주요 이해관계자의 역할이 중요하며 향후 다양한 프로젝트를 통한 사이버복원력 체계 내재화, 재직자 사이버보안 역량 강화, 선박 사이버안전 기술 지속적 연구가 필요하다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2024.01a
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• pp.467-468
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• 2024

본 논문에서는 중국의 자율운항선박 기술개발 현황 및 신기술 관련 승인제도에 관한 연구하고자 한다. 제4차 산업혁명에 따라 해운산업에서도 자율운항선박이 등장하게 되었고, 현재 많은 국가들이 치열하고 기술개발에 열을 올리고 있다. 우리나라 역시 자율운항선박 기술개발을 위해 노력하고 있으며, 이와 더불어 자율운항선박 상용화를 위한 규제특례 및 승인제도를 도입하고자 한다. 자율운항선박은 현존선과 다른 선박 구조적 특성 및 시스템상의 특성을 가지고 있으며, 국제해사기구의 기준을 기반으로 주요 해양국가들은 자율운항선박의 실증운전 및 상용화를 위하여 자율운항선박 및 기자재 인증제도를 채택하고 있다. 본 논문은 중국의 자율운항선박 기술개발 현황 및 자율운항시스템등과 같은 신기술 승인제도를 연구하여 시사점을 얻고자 한다.

• Asian-Australasian Journal of Animal Sciences
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• v.32 no.7
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• pp.1015-1026
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• 2019

Objective: The objective of this study was to evaluate three different degrees of white striping (WS) addressing their automatic assessment and customer acceptance. The WS classification was performed based on a computer vision system (CVS), exploring different machine learning (ML) algorithms and the most important image features. Moreover, it was verified by consumer acceptance and purchase intent. Methods: The samples for image analysis were classified by trained specialists, according to severity degrees regarding visual and firmness aspects. Samples were obtained with a digital camera, and 25 features were extracted from these images. ML algorithms were applied aiming to induce a model capable of classifying the samples into three severity degrees. In addition, two sensory analyses were performed: 75 samples properly grilled were used for the first sensory test, and 9 photos for the second. All tests were performed using a 10-cm hybrid hedonic scale (acceptance test) and a 5-point scale (purchase intention). Results: The information gain metric ranked 13 attributes. However, just one type of image feature was not enough to describe the phenomenon. The classification models support vector machine, fuzzy-W, and random forest showed the best results with similar general accuracy (86.4%). The worst performance was obtained by multilayer perceptron (70.9%) with the high error rate in normal (NORM) sample predictions. The sensory analysis of acceptance verified that WS myopathy negatively affects the texture of the broiler breast fillets when grilled and the appearance attribute of the raw samples, which influenced the purchase intention scores of raw samples. Conclusion: The proposed system has proved to be adequate (fast and accurate) for the classification of WS samples. The sensory analysis of acceptance showed that WS myopathy negatively affects the tenderness of the broiler breast fillets when grilled, while the appearance attribute of the raw samples eventually influenced purchase intentions.