• Title/Summary/Keyword: navigational information

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Cognition-based Navigational Planning for Mobile Robots (인지에 기반한 이동 로봇의 운항계획)

  • Lee, In-K.;Lee, Dong-J.;Lee, Suk-Gyu;Kwon, Soon-H.
    • Journal of the Korean Institute of Intelligent Systems
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    • v.14 no.2
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    • pp.171-177
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    • 2004
  • In this paper, we propose a cognition-based navigational algorithm for mobile robots in dynamic environments. The proposed algorithm consists of two main stages: (i) the fuzzy logic-based perception stage that constructs knowledge from the sensory data for subsequent usage in reasoning, and (ii) the planning stage that identifies the path between a starting and a goal position within its environment on the basis of the knowledge base on the environment and information from the perception stage. A mobile robot reasons places and moves to goal using ambiguous information and ambiguous knowledge through ‘perception’ and ‘planning’. We provide computer simulation results for a mobile robot in order to show the validity of the proposed algorithm.

Implementation of Intelligent BNWAS and NMEA protocol Bridge Based on RlexRay (FlexRay 기반의 지능형 BNWAS 및 NMEA 프로토콜 브릿지 구현)

  • Kim, Gwan-Hyung;Kim, Min;Byun, Gi-Sig
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2010.10a
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    • pp.183-186
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    • 2010
  • This paper presents a stable real-time based FlexRay technology which is employed with a standard protocol of the marine electronic equipments and the bridge navigational watch alarm system (BNWAS). The traditional marine communications use NMEA communication protocols, and RS-232 and RS-422 techniques in the BNWAS, thus there are difficulty in seeking stability and reliability. To overcome such problems we utilize the FlexRay protocol technique to prevent data loss or error.

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Development of Auto-navigation System having Automatically Changeable Function for Main Navigation Equipments (주요 항해장비의 자동대체기능을 가지는 항해자동화 시스템의 개발)

  • 이정우;이덕상;김득태;정일영;심탁섭;이성신;배진호
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2001.05a
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    • pp.737-740
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    • 2001
  • We develope the PC based SPS to improve safety at sea, save fuel and time during a voyage and makes mariner's work more efficient and comfortable in ship navigation, who propose the auto-navigation system with SPS as basic main system. Developed SPS operate the function to monitor navigational equipment and to substitute a broken main navigational equipment such as CIS, ECDIS, or Radar/ARPA, automatically. These can be improve more efficient and comfortable ship navigation and reduce these traffic accident. The SPS has the function as DB and network server, additionally.

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New Model Course on Training in Operational Use of ECDIS

  • Weintrit, Adam
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.2
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    • pp.367-372
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    • 2006
  • The revision of SOLAS, Chapter V, which entered into force on 1 July 2002, has firmly established the electronic navigational chart as part of the international maritime safety system. Its possible recognition as a paper chart equivalent confirms the considerable safety benefits provided by the official Electronic Chart Display and Information Systems (ECDIS). Elaborated by the Author IAMU Model Course on operational use of ECDIS aims to provide answers to some of the most commonly asked questions regarding various types of electronic charts (ENC, RNC, DNC) and electronic chart systems (ECDIS, RCDS, ECS). Following the earlier adoption of the International Convention STCW 78/95 and IMO model training courses, e.g. IMO Model Course on ECDIS [2], to assist in the implementation of the Convention and the associated IMO Assembly resolutions, a number of IAMU Member Universities had suggested that IAMU should develop model training courses on higher academic level to assist in achieving a more rapid transfer of information and skills regarding new developments in marine technology. The provision of model courses could help instructors improve the quality of their existing courses and enhance their effectiveness in meeting the requirements of the IAMU. In this paper the Author presents the results of two IAMU research projects sponsored by Nippon Foundation, titled 'IAMU Model Course on Training in Operational Use of ECDIS' and 'IAMU Handbook on ECDIS'.

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Analysis on ECDIS Standards and Implementation (ECDIS 표준 및 요구사항 분석과 구현)

  • 박종민
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 1998.05a
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    • pp.359-364
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    • 1998
  • 최근 해상에서의 물류 증가 및 그에 따른 사고의 증가로 인한 인적, 물적 그리고 이로 인한 환경 오염과 이차적 피해가 늘어남에 따라 선박 사고 예방에 대한 관심이 고조되고 있으며 컴퓨터 및 전자 장비를 활용한 항해 장비의 개발이 가속화되고 있다. 그 일환으로 선박 안전 항해 장비인 Electronic Chart Display & Information System(ECDIS) 및 ECDIS의 기본 운용 데이터인 Electronic Navigational Chart(ENC)의 표준과 그에 따르는 규격이 국제 해사기구(IHO) 및 국제 해상 기구(IMO)에서 제정, 공표하였고 이미 일부 선진국에서는 ENC를 구축하고 ECDIS를 개발하여 운영하고 있다. 본 논문에서는 ECDIS 성능 표준 및 요구 사항을 분석하고 이를 토대로 한 실제 구현 결과를 소개한다.

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Usability Test and Investigation of Improvements of the ECDIS (ECDIS의 사용성 평가 및 개선사항 분석)

  • Lee, Bo-Kyeong
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.24 no.2
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    • pp.146-156
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    • 2018
  • The ship's chart system was changed from the use of paper chart to the ENC (Electronic Navigational Chart) using ECDIS (Electronic Chart Display and Information System). The introduction of ENC in ships is necessary for ship automation and for the digitalizing of data and integration of information, but unexpected various problems have occurred and are posing a great threat to safe navigation in the transitional period when the new system has been applied to the sea. In this paper, to assess whether ECDIS contributes to the safety of navigation for its intended purposes as new navigation equipment, a usability test of ECDIS was conducted on masters and crew who have used ECDIS on ocean-going vessels. The result was verified with a paired sample T-test, and it was significantly analyzed with the effectiveness of a simplified task; cost efficiency was decreased since ECDIS was used. By analyzing 'MSC.1/Circ.1503 ECDIS - Guidance for good practice', we found that the effects of the maintenance of ECDIS software, operating anomalies identified within ECDIS, differences between raster chart display system (RCDS) and ECDIS, and matters of identification were compounded by the overlapping information on the safety of ships. The anomalies were also grouped according to their characteristics, and we proposed suitable improvements accordingly. The reason for the reduction in efficiency in the usability test was that the problems with ECDIS were intended to be solved only with the careful use of navigational officers who did not have systematic solutions. To solve these problems, the maintenance of software, the improvement of ECDIS anomalies, the reliable ENC issuance including the global oceans, and S-mode development are a priority.

Servicing Photographs for Route Guidance in Navigation Systems

  • Sung Kyung Bok;Yoo Jae Jun
    • Proceedings of the KSRS Conference
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    • 2004.10a
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    • pp.72-76
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    • 2004
  • For successful route guidance, navigation systems should provide to users more realistic and actual information such as photographs than those in either 2-dimensional and 3-dimensional models. In this paper, we propose a method for servicing photographs for route guidance in navigation systems. The method includes how to acquire photographs with the most successful view for the guidance, how to construct link information among them and navigational map data, and how to provide the images to users efficiently.

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Buoy-launched Terminal Equipment and Ship-launched Gateway Equipment Based on LoRa for Identification of Fishing Gear (LoRa 기반 어구 식별용 부이 장착 단말 및 어선용 게이트웨이)

  • Kwak, Jae-Min;Lee, Seong-Real
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.5
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    • pp.779-786
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    • 2018
  • Ministry of oceans and Fisheries declared action plan for the electric fishing gear using real name in order to prevent overusing the fishing gear and to reduce discarded fishing gear. It is needed for a technique that can efficiently transmit the information including the type and location of the fishing gear and the user's real name to the fishing boat and the control center using IoT-based communication. In this paper, we propose the buoy-launched terminal equipment and ship-launched gateway equipment based on LoRa technology for effectively executing the electric fishing gear using real name. We design and fabricate to communicate 1(gateway):200(buoy) each other under 900 MHz ISM band by using SEMTECH SX1276 chip. Also, we experiment the test on the sea and analyze the test results to prove the implementation possibility of the proposed equipments for the electric fishing gear using real name.

A Framework for Electronic Navigational Chart Systems Based on the Web (웹 기반의 전자해도 시스템을 위한 프레임워크)

  • Lee Seong-Dae;Park Hyu-Chan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.8
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    • pp.1449-1458
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    • 2006
  • Electronic Navigational Charts (ENCs) are digital charts which contain a great variety of data on coast and sea regions. Although they contain much information that ordinary people are interested in, there is no easy way to access because they are coded in the specialized data forma, and can be visualized by using specialized system. Therefore, supporting systems need to be developed for ordinary people to easily access ENCs. This paper proposes a framework for the ENC systems based on the Web. It relies on quite general standards such as Ceography Markup Language (GML) and Scalable Vector Graphics (SVG). In the framework, ENCs coded in S-57 format are first translated into GML to be stored in a database. Once the database is built, users can request to the database what they want. According to the user request, relevant data are retrieved, and then translated into SVG to be displayed on the Web browser. By using the framework, ordinary people may easily access coast and sea information contained in the ENCs. Furthermore, the framework may provide interoperability by virtue of XML-based standards such as GML and SVG, and efficiency by virtue of database. To validate the feasibility of proposed framework, a prototype system is developed and tested.

An Analysis of the Hyperlinks of Internet Newspaper Sites: Focused on Chosun.com and the Washington Post (인터넷신문 섹션별 뉴스기사 본문의 하이퍼링크에 대한 분석: 조선닷컴과 워싱턴포스트를 중심으로)

  • Kim, Seong-Hee;Roh, Yoon-Ju
    • Journal of Information Management
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    • v.43 no.4
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    • pp.119-142
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    • 2012
  • This study analyzed the characteristics of hyperlink service from news articles in chosun.com and washington Post sites. The study showed that the Washington Post revealed many hyperlink-related elements and an increase in interactivity while Chosun.com was not established consistent hyperlink service. Also, this study analyzed news distribution based on genre, as a result, the life section was occupied the highest proportion with 32.4% for Chosun.com, while the news sections were evenly distributed for the Washington Post. Finally, as a result of classifying the linked words into 3 categories(Informational, navigational, and transactional), the highest contents category in both Chosun.com and Washington Post turned out to be informational words. Theses results can be used to develop and provide the effective link service of news articles in internet newspaper sites.