• 수산해양교육연구
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• 제16권2호
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• pp.227-237
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• 2004

Recently development trends in information technology expand the activity boundaries for human living beyond coastal zones. These rapid changes of paradigm are stimulating scientists and strategists to be encouraged in making adequate model for marine geographic information system (MGIS) and their applications. Coastal zones are places which are affected by many factors, such as water quality, tide, wave, atmosphere, population, industry, etc. Therefore information related to the coast has to be integrated and analyzed for managing it efficiently. GIS-based Ocean Informatics is suited for those purposes and used in the study for establishing and managing coastal geographic and environmental information system. This paper reviews the properties of ocean and coastal spaces, then defines some MGIS related terminologies for clarifying the scope of MGIS boundaries. In this study, coastal geographic information is established by digital geographic information and digital terrain information. Digital coast chart having information on digital chart and map can merge and analyze various coastal information and can be a useful tool for the coastal integrated management.

• 한국해양공학회지
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• 제37권5호
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• pp.190-197
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• 2023

In the shipbuilding and marine industry, digital transformation activities are promoted primarily by large shipyards. However, bottlenecks are observed across value chains, and digital transformation effects are reducing because of the cost and technical challenges encountered by supplies. In this study, we proposed a win-win cooperation model for large, small, and medium-sized companies using digital transformation based on the characteristics of the shipbuilding and marine industry through case studies. We investigated the digital transformation progress in German and Korean small and medium-sized enterprises (SMEs). In addition, we identified information-sharing methods and management challenges encountered in enterprise resource planning and manufacturing execution systems in the collaboration process of pipes, panels, blocks, etc. of SMEs that are suppliers of a Korean shipyard, and clarified communication by building a platform based on a common format between shipyards and suppliers. Further, we proposed a standard model of a digital transformation system for enhancing the collaboration between large companies and suppliers and proposed a basic plan including strategies to efficiently and effectively build a digital transformation system based on the standard model.

• 한국도서관정보학회지
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• 제47권2호
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• pp.175-200
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• 2016

본 연구는 해양 전문 디지털도서관 건립 타당성분석 연구의 일부로써 도서관 건립의 경제적 타당성에 대한 기초적인 결과를 검토하는데 그 목적이 있다. 이와 같은 목적을 위하여, 본 연구에서는 도서관 건립의 정책적 타당성, 수요분석 및 경제적 타당성 분석을 수행하였다. 경제성 분석에는 편익/비용 비율, 순현재가치, 내부수익률을 계산하여 경제성을 분석하였으며, 조건부 가치 추정법을 활용하여 편익을 추정하였다. 그 결과, 해양 전문 디지털도서관의 건립에 필요한 추가적인 세금에 대한 응답자의 지불의사 금액이 상대적으로 높으며, 경제적 타당성을 가지는 것으로 분석되었다.

• 대한조선학회논문집
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• 제48권6호
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• pp.490-500
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• 2011

The paradigm that ships are navigated by means of analog navigation devices and caption's experiences is shifted to that ships can be navigated by digital and autonomous navigation systems due to the rapid development of electronics and communication technologies. Hence, all systems deployed in a ship are automated and integrated since corresponding ship systems are not individually operated but integrated and managed under common operating system. In this paper, we overview recent research projects targeted for digitally integrated ships (referred to as digital ships), outline IEC 61162 series, specifying digital interface standards for digital ships, and finally present several issues for further improvement of the IEC 61162 series. In addition, we broadly categorize digital ships into three systems consisting of multiple sub-systems, including a navigation system, a power system, and a automation system in the aspect of operation and function. Corresponding interfacing range and method, as well as interface specification and data types of one system in a digital ship are also described according to sub-systems, respectively.

• 한국해양공학회지
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• 제17권1호
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• pp.61-66
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• 2003

A nautical chart is an essential material not only for the safety of navigation at sea, but also for the research and understanding of the ocean. Paper nautical harts have been used for navigational purposes for several hundreds years, but it was show that paper nautical charts have certain limitations, because the speed of ships has increased dramatically, and Global Positioning Systems (GPS) are now available at sea. Thus, the development of digital charts has been conducted by a number of countries. As a result, the International Hydrographic Organization (IHO) has developed a standard format, Special Publication No. 57 (S-57), as a guideline for the production of electronic navigational charts (ENC). Even though ENCs are a state-of-the-art navigational tool because they are produced on the basis of Geographical Information System (GIS) technology, they can be utilized for various purposes. in this paper, the usage of paper nautical charts, ENCs, and digital charts is reviewed. Also, the various application system that make use of electronic navigational harts and digital charts, as a basic geographical source of information, will be examined on the basis of GIS.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2007년도 추계학술대회 및 제23회 정기총회
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• pp.184-186
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• 2007

국제수로기구인 IHO는 수로국 간 수로데이터를 교환하거나 향해장비 생산자, 항해자, 기타 사용자에게 수로데이터를 공급하기 위해 수로데이터 교환표준인 S-57 표준을 개발하였다. IHO는 S-57 표준을 수로분야 범용 표준으로 만들었으나 ECDIS의 베이스맵으로 사용되는 전자해도 제작에만 한정되어 사용되어 왔다. 이를 개선하고자 IHO는 육상GIS의 ISO/TC 211 의 1900 시리즈 표준을 적극 수용 하여 S-100 표준을 개발 중에 있다. S-100 표준은 항해장비 및 해양정보시스템 등 크게 영향을 미칠 것으로 예상되는 바, 본 연구에서는 S-100 수로데이터 개발방법을 정리하고 이를 적용한 수로데이터 제작방안을 제시한다.

• The Journal of the Acoustical Society of Korea
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• 제24권3E호
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• pp.109-114
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• 2005

In this paper, we present a phase coherent all-digital transceiver for underwater acoustic communication, which allows the system to reduce complexity and increase robustness in time variant underwater environments. It is designed in the digital domain except for transducers and amplifiers and implemented by using a multiple digital signal processors (DSPs) system. For phase coherent reception, conventional systems employed phase-locked loop (PLL) and delay-locked loop (DLL) for synchronization, but this paper suggests a frame synchronization scheme based on the quadrature receiver structure without using phase information. We show experimental results in the underwater anechoic basin at MOERI. The results show that the adaptive equalizer compensates frame synchronization error and the correction capability is dependent on the length of equalizer.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.287-288
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• 2006

CG and Photo-realistic image composition in the ocean scenes is frequently used in movies and TV advertisement. But it is very difficult task because it's impossible to use calibration tool in outdoor environment or to use auto-calibration algorithm using natural features like KLT(Kanade Lucas Tomasi feature tracker) from the ocean scene. We propose a simple, effective method for solving camera motion using previous knowledge about background structure. We applied our method to the production of a commercial movie, 'Hanbando' and the result was satisfactory.

• 대한조선학회논문집
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• 제42권2호
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• pp.165-174
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• 2005

Recently, world leading companies on manufacturing field are trying to adopt a PLM methodology, which is a new production paradigm, for a survival and strengthening the competitiveness. Some projects for a digital shipyard including a methodology of a digital simulation framework are going on by Seoul national university and Samsung heavy industry. A Database methodology for a scheduling data, an interfacing methodology for a simulation input and output, and a synchronized simulation related methodology are required for enhancing the value of the digital simulation for shipbuilding. In this paper, such a methodologies and a related case study for a fabrication factory and an assembly factory are presented.

• 한국항해항만학회지
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• 제47권4호
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• pp.220-230
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• 2023

항로표지는 안전한 항해를 위해 중요한 도구로 항로표지가 제공하는 다양한 정보는 매우 중요하다. 항로표지 정보를 효율적으로 활용하기 위한 표준화된 항로표지 정보에 대한 수요는 점차 증가하고 있으며, 이를 위해 국제항로표지협회에서는 항로표지 정보관리 표준인 S-201을 제정하고 회원국에게 적용을 권고하고 있다. 그러나 우리나라는 항로표지법에 따라 항로표지를 정의하고 그 정보를 관리하고 있기에 국제적인 표준인 S-201 표준에 따른 정의 및 정보관리의 필요성은 더욱 커지고 있다. 이에 본 연구에서는 국제항로표지협회의 권고에 따라 S-201 표준을 적용한 항로표지 정보 관리 방안을 제시하고자 하였다. 이를 위해 국제항로표지협회의 항로표지 정보 분류기준과 우리나라의 분류기준을 비교한 후, S-201 표준을 적용한 우리나라 항로표지 정보관리방안을 제시하였다. 이러한 연구 결과는 전세계적으로 정보 활용이 용이한 표준화된 디지털 항로표지 정보를 관리하는 데 중요한 기초자료로 활용될 것이라고 사료된다.