• Title/Summary/Keyword: 상선

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선박 ECDIS의 올바른 사용을 위한 지침 분석

  • Lee, Bo-Gyeong;Kim, Dae-Hae;Jo, Ik-Sun
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2016.05a
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    • pp.64-66
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    • 2016
  • 국제항해에 종사하는 500GT 이상의 상선에서는 SOLAS에 의해 2012년부터 ECDIS 사용이 강제화 됨에 따라 선박에서는 기존의 종이해도 대신 전자해도를 가지고 항해해야하는 극적인 변화를 맞이하였다. ECDIS는 H/W, S/W, data가 어우러진 복합전자장비로서 안전항해를 위해서는 ECDIS에서 제공받는 데이터의 신뢰성, 시스템 안전성을 확보하고 ECDIS에 대한 사용자의 올바른 이해와 숙련이 매우 중요하다. 하지만 선박에 새로운 항해 장비가 등장함으로서 예측하지 못한 다양한 문제가 식별되었고 또다른 문제가 추가적으로 발견될 수 있는 위험성을 내포하고 있다. 이러한 문제점을 보완하고 ECDIS 장비의 안정적인 선박 도입이 진행되도록 IMO에서는 식별된 ECDIS의 이상현상과 주의사항에 대한 회람문서가 하나의 통합된 문서로 발행되었다. 이 연구에서는ECDIS의 올바른 사용을 위해서 2015년 발행된 통합 ECDIS 회람문서 'ECDIS-Good Practice'를 바탕으로 선박에서 ECDIS를 안정적으로 사용하고 받아들일 수 있는 방법에 대해서 분석하였다.

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Preparation of multi-component ceramic proton conductors for intermediate temperature fuel cell (중온형 연료전지를 위한 다성분계 세라믹 수소이온 전도체 제조)

  • Lim, Byeong-mu;Seo, Dong-ho;Park, Sang-sun;Lee, Hong-yeon;Shul, Yong-Gun
    • 한국신재생에너지학회:학술대회논문집
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    • 2009.06a
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    • pp.410-411
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    • 2009
  • The multi-component ceramic proton conductor, $BaZr(Y)O_3-SiO_2-TiO_2-ZrO_2$ (BZY-STZ) and $LaPO_4-SiO_2-TiO_2-ZrO_2$ (LP-STZ), were synthesized by micro-emersion and sol-gel technique. The characterization of proton conductors were carried out using X-ray diffraction(XRD), thermogravimetric analysis(TGA), differential thermal analysis(DTA), impedance analysis. The proton conductors indicate the possibility of application for the intermediate temperature up to $700^{\circ}C$.

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Mechanical vibration-Measurements of vibration on ships(ISO 20283) (선박 진동계측에 관한 국제 동향(ISO 20283))

  • Lee, D.C.;Kim, J.S.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2007.05a
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    • pp.550-555
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    • 2007
  • This paper introduces the mechanical vibration-measurements of vibration on ships(ISO 20283). Regulations and guidelines for vibration of hull structures, propulsion machinery and onboard equipments on ship were established mainly by classification societies or International Association of Classification Societies(IACS). The initial draft of ISO 20283 was proposed by USA and based on US military standards. Though these are not suitable to passenger and merchant ships, many experts have felt the need of the ISO regulation for the vibration measurement on ship. Hence, these standards are re-drafted and reviewed by particulate ISO members. In this paper, authors introduce the important agendas and the controversial items during setup of ISO 20283.

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Reasonable Optimum Design of Agricultural Reinforced Concrete Structure - Superstructures of Aqueduct - (농업용 철근콘크리트 구조물의 합리적인 최적설계 -수로교 상부구조물-)

  • Kim, Jong-Ok;Park, Chan-Gi;Cha, Sang-Sun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.52 no.5
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    • pp.19-26
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    • 2010
  • This study was conducted to find out the reasonable optimum design method of agricultural reinforced concrete structures. Selected design variables are the dimension of concrete section, reinforced steel area, and objective function is formulated by cost function. To test the reliability, efficiency, possibility of application and reasonability of optimum design method, both continuous optimization method and mixed-discrete optimization method were applied to the design of reinforced concrete superstructure of aqueduct and application results were discussed. It is proved that mixed-discrete optimization method is more reliable, efficient and reasonable than continuous optimization method for the optimum design of reinforced concrete agricultural structures.

Improvements Resulting from Policy Changes in Recycling Food Wastes (음식물류폐기물의 자원화정책 변화에 따른 개선효과)

  • Ahn, Sang-Seon
    • Journal of the Korea Organic Resources Recycling Association
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    • v.13 no.2
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    • pp.65-73
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    • 2005
  • After the introduction of Volume-based Waste Fee System for municipal wastes, the disposal of food wastes became an issue an issue in society. Concerted efforts among government agencies have been made to manage food wastes separately from municipal wastes. For example, the Ministry of Environment, the Ministry of Agriculture and Forestry, and the Ministry of Health and Welfare established the '5-year('98-'02) Basic Plan for Recycling Food Wastes' in September 1998. Also changes in the waste disposal system has been sought, aiming at the Resource-circulating Society.

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EFFECTS OF STEROID HORMONES ON SERUM SODIUM AND POTASSIUM IN PARATHYROIDECTOMIZED CHICKENS (Steroid hormone이 부갑상선 적출 수탉에 있어서 혈청쏘디움 및 포타슘 농도에 미치는 영향에 관한 연구)

  • Moon, Dong-Sun
    • The Journal of the Korean dental association
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    • v.10 no.6
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    • pp.369-372
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    • 1972
  • This study was investigated that effects of steroid hormones on serum sodium and potassium concentration in parathyroidectomized chickens. The results are as followings; 1) Serum sodium and potassium concentration in SHAM-controls were unchanged. 2) In parathyroidectomized chickens, serum potassium level increased more than that of control and serum sodium level appeared no change in each group. 3) In group of administration of cortisone in parathyroidectomized chickens, serum potassium level increased generally more than that of control and serum sodium level appeared no change in each group. 4) In group of administration of testosterone in parathyroidectomized chickens, serum potassium level increased generally more than that of control and serum sodium level revealed no change in each group.

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The Present Status of Pumps Installed in the Large Merchant Ships (대형 상선에서의 펌프사용 현황)

  • Kim, You-Taek;Nam, Chung-Do;Lee, Young-Ho
    • The KSFM Journal of Fluid Machinery
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    • v.4 no.4 s.13
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    • pp.43-52
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    • 2001
  • Pumps arre used extensively for transporting fluid in many ships. However, the present state of pumps used in the large merchant ships has not been studied. In this paper, we have reported the general description of the operating pumps according to the different ship types(Bulk, Container, Car-Carrier, Tanker, LNG). Moreover, the pump total powers are compared with the main engine Normal Continuous Rating power and the pump total weights are also compared with the ship deadweight.

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조선 조립블록 지번할당 알고리즘 개발

  • Park Chang-Gyu;Seo Jun-Yong;Kim Ji-On;Lee Sang-Hyeop;Baek Tae-Hyeon;Min Sang-Gyu
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2006.05a
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    • pp.1582-1585
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    • 2006
  • 조선 현장의 블록 적치장에서 어떻게 하면 조립블록을 효율적으로 관리할 수 있을까 하는 것은 중요한 경영상의 난제이다. 본 연구는 세계 최대의 선박건조업체이며, 한국상선건조산업 분야에서 리더로서의 역할을 수행하고 있는 현대중공업에서 수행한 프로젝트를 바탕으로 조선 조립블록의 지번할당문제를 정의하고 조립블록 지번할당을 위한 알고리즘을 개발한다. 그리고 여러 상황에서 모의실험을 실시하여 본 연구에서 개발한 조립블록 지번할당 알고리즘의 유용성을 검증한다.

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Introduction For Gas Turbine Electric Propulsion LNGC (GAS TURBINE ELECTRIC PROPULSION LNG선 소개)

  • Yeo, Dong-Il
    • Proceedings of the Korean Society of Marine Engineers Conference
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    • 2006.06a
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    • pp.27-28
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    • 2006
  • 최근 LNG 연료 시장의 호황에 힘입어 LNG선들이 점차 대형화 추세에 있고, LNG선의 추진 기관 또한 경제성, 환경 영향 등의 주어진 요구 환경에 따라 다양화 되고 있다. 기존의 Steam Turbine Propulsion 외에 Conventional 2-stroke Diesel Engine 및 Dual-fuel 4-stroke Diesel Engine of LNG선의 주 기관으로서 이미 상용화 되었고, 기술적/경제적인 이유로 일반 상선의 주기관으로서는 논외에 있었던 Gas Turbine 또한 일부 Oil Major와 Gas Turbine Maker에 의해 그 적용 가능성이 논의되고 있다. 이에 따라 LNG 선에 Gas Turbine 적용 타당성, 고려 사항 및 적용에 따른 이점과 단점 등을 고찰하였다.

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Relationship Between Texture and Deformability in Fe-Ni Invar Alloy Strips (Fe-Ni 인바(Invar) 합금 박판의 가공성 향상을 위한 방향성 조직 제어)

  • Park, S.Y.;NamGung, J.;Kim, M.C.;Kim, S.S.;Lee, S.S.;Park, C.G.
    • Transactions of Materials Processing
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    • v.15 no.8 s.89
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    • pp.586-590
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    • 2006
  • 42Ni-Fe Invar alloy strips were fabricated using conventional ingot casting and melt drag casting followed by rolling. Mechanical properties such as tensile strength, elongation and blanking deformability of the strips were evaluated. The properties were strongly depended on fabrication methods. Tensile strength and elongation of all strips were in the range of $40-60kg/mm^{2}$ and 26-35%, respectively, which are enough values for the manufacture of the final products. In some of the strips, however, burrs occurred at deformed surface. The properties of strips were explained in terms of microstructure such as grain size and texture formation during rolling. Additionally, strips by melt drag casting method were compared to those by conventional ingot casting.