• Title/Summary/Keyword: Sea Transportation

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A Comparative Study on Policy of Modal Shift for Enhancing of Eco-friendly Rail Freight Transportation (친환경수단으로서의 철도화물운송 증대를 위한 Modal Shift 정책 비교 연구)

  • Lee, Yoon-Mi;Moon, Dae-Seop;Yoo, Jae-Kyun
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.2455-2462
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    • 2008
  • Global warming has become one of the most important social responsibilities. After Kyoto protocol for greenhouse gas reduction by climatic change convention came into effect, developed countries are presenting various policies to reduce greenhouse gas that is produced in transport field. One of those policies is modal shift that change from road freight to sea, inland waterway and railway transportation that is eco-friendly. Because increase of road freight brings about road congestion and accident, logistics cost, air pollution and green house gases. Railways are superior to all other modes of transport in mass transportability, high speed, timeliness, safety and environmental-friendliness, but the railway industry has been pushed behind in competition. In developed country's government actively promoted relevant legislation, policies, and countermeasures known as modal shift policies to shift freight transport from road to large volume mode such as railway and ship. In this paper, we discuss the current situation in modal shift, compare it with cases in other countries EU and Japan, identify problems in Korea, and propose the following ways to enhance competitiveness of rail freight.

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The Characteristics of the Fog and Analysis of the Advection.Radiation Fog by KLAPS in Honam Region (호남지방 안개 특성 및 KLAPS를 통한 이류.복사안개 사례 연구)

  • Won, Hyo-Sung;Yu, Keun-Gi;Ryu, Chan-Su
    • Journal of Integrative Natural Science
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    • v.4 no.4
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    • pp.298-310
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    • 2011
  • Recently the traffics and transportation hazzards by fog are tremendously Increased. There occurred the greater traffic disaster by Dense Fog of Oct.2006. In this study frequent occurrences of advection fogs centerd over Honam Prov are investigated. Increment of transportation during the Fog period for 1996~2005(decade)are statistically analyzed with Honam Prov.'s fogs. For Honam west coast(Gunsan, Mokpo), inland of Honam(Junju, Gwangju, Suncheon), Honam south coast(Wando, Yepsu), Wind, Dew point, Diff. of air and sea temp. relative humidity are classified between 12 hours before and on time of fog with three Dimensional Analysis System(KLAPS). High frequencies of advection-radiation Fog occurrence in western Coasts except for Suncheon. The application of fog characteristics analyzed by KLAPS for denser fog over the western coast in Fall to Fog prediction and special advisory issues. The advection-radiation fog can occure favorably when the moisture index is less than $2^{\circ}C$, relative humidity is greater than 90%, but the moisture depth is under 1.5 km. In addition when the height of 925 hPa is rising, then fog occurs, but for sinking is disappearing.

Optimized Ballast Water Exchange Management for Bulk Carriers (벌크 화물선용 자동 밸러스트수 교환계획 시스템 개발)

  • HONG CHUNG-YOU;PARK JE-WOONG
    • Journal of Ocean Engineering and Technology
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    • v.18 no.4 s.59
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    • pp.65-70
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    • 2004
  • Many port states, such as New Zealand, U.S.A., Australia, and Canada, have strict regulations to prevent arriving ships from discharging polluted ballast water that contains harmful aquatic organisms and pathogens. They are notified that transfer of polluted ballast water can cause serious injury to public health and damage to property and environment. For this reason, ballast exchange in deep sea is perceived as the most effective method of emptying ballast water. The ballast management plan contains the effective exchange method, ballast system, and safety considerations. In this study, we pursued both nautical engineering analysis and optimization of the algorithm, in order to generate the sequence of stability and rapidity. A heuristic algorithm was chosen on the basis of optimality and applicability to a sequential exchange problem. We have built an optimized algorithm for the automatic exchange of ballast water, by redefining core elements of the A$\ast$ algorithm, such as node, operator, and evaluation function. The final version of the optimized algorithm has been applied to existing bulk carrier, and the performance of the algorithm has been successfully verified.

A Study on Ship Path Planning Algorithm based on Real-time Ocean Environment (실해역 환경을 고려한 선박의 최적항해계획 알고리즘 연구)

  • Kim, Dongjun;Seol, Hyeonju;Kim, Jinju
    • Journal of the Korea Institute of Military Science and Technology
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    • v.19 no.2
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    • pp.252-260
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    • 2016
  • Unlike terrestrial transportation, marine transportation should consider environment factors in order to optimize path planning. This is because, ship's path planning is greatly influenced by real-time ocean environment-sea currents, wave and wind. Therefore, in this study, we suggest a ship path planning algorithm based on real-time ocean environment using not only $A^*$ algorithm but also path smoothing method. Moreover, in order to improve objective function value, we also consider ship's moving distance based on ship's location and real-time ocean environment data on grid map. The efficiency of the suggested algorithm is proved by comparing with $A^*$ algorithm only. This algorithm can be used as a reasonable automatics control system algorithm for unmaned ship.

A Study on the Development of the Marine Traffic Analysis System Based on Automatic Identification System (선박자동식별장치(AIS) 기반 해상교통량 조사.분석 시스템 개발에 관한 연구 논문)

  • Kim, Chang-Min;Jeong, Jae-Yong;Kim, Cheol-Seung
    • Proceedings of KOSOMES biannual meeting
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    • 2008.05a
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    • pp.173-176
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    • 2008
  • It is very important to protect life, property at sea and marine environments from any pollution AIS, which was been carried out July 1st, 2002 by SOLAS ch. 5, is an communication system to enhance navigational safety by transmitting and receiving vessel information automatically. In this paper, we investigated the positive factors expected by introducing AIS. For this, ship's collision accidents were analyzed. Finally, we suggest methods to solve several problems related to operation in AIS.

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A Study on China's "the Belt and Road" Initiative and the Collaboration Scheme for the Main Ports in Tumen River Region (중국의 "일대일로" 창의와 두만강 지역 주요 항만의 협력방안에 관한 연구)

  • Li, Zhong-Shi;Li, Xue
    • Journal of the Korea Safety Management & Science
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    • v.23 no.1
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    • pp.31-38
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    • 2021
  • port is the intersection of highway, railway, waterway and other transportation modes, and is the key to realizing integrated transportation. There are many excellent ports around the Tumen River Region. With the obvious location advantages, Tumen River Region is an important part of Tumen River regional cooperation and development, and is the key to realizing the "borrow port to sea", which is raised in "China Tumen River regional cooperation and development planning outline -- regard Changjitu area as the development and opening leading area" (referred to as "planning outline"). This paper focus on the main ports in the Tumen River region, taking them as the research object. Furthermore, the paper makes the strategic plan for the port cluster in the Tumen River region as well as puts a collaboration scheme is proposed by analyzing the research reviews of the Tumen River region and the present situations of the main ports.

The Analysis of the Transportation Process of Mokpo Port (목포항 운송과정의 분석)

  • Nam, M.U.;Lee, C.Y.;Park, G.K.;Yun, M.O.
    • Journal of Korean Port Research
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    • v.9 no.1
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    • pp.33-43
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    • 1995
  • Korean economic and industrial structure has been seperated into some areas with the trend of the change to the bloc system of international economy: the Gyeongin including the capital area, the Middle-West, the South-West, the South-East, and the Eastern sea areas. Mokpo port has played a major role as the central one of the South-West area and the entrance of Yeong-san river of Jeonnam province gate. Some studies has been done on the Mokpo port, but there is no research of the analytical approach about it. In this paper, we analyze the data of 1994's on the domestic and oceangoing piers in the Mokpo port and simulate the transportation process of it through a queueing model. The results of the simulation are summarized as follows: The average arrival interval of the domestic vessel is 6.034 hours. The average service time and the berth utility rate are 24.056 hours and over 100%, respectively. The average arrival interval of the oceangoing vessel is 34.48 hours. The average service time and the berth utility rate are 120.04 hours and the 34.91%, respectively. The proposal to improving of the Mokpo port as follows: It is desirable to extend the capacity of domestic pier to about 50% for the optimal utility rate of 70% and in the case of oceangoing pier to be increase 65% of the vessel capacity for the optimal utility rate of 70%.

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A Study on the Infrared Signature of a Naval Ship under the Marine Climate (함정 표면 적외선 신호에 대한 해양기상 영향분석)

  • Kim, Yoon-Sik
    • Journal of the Society of Naval Architects of Korea
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    • v.49 no.3
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    • pp.264-272
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    • 2012
  • A study on the IR(InfraRed) signature of a naval ship has been performed using well known IR signature analysis software, ShipIR/NTCS. Variations of the IR signature radiated from skins of a naval ship have been investigated according to the monthly averaged marine climate conditions. An unclassified destroyer model with and without applying the washdown system was applied to compare the influence on the signature under the background changes. The marine background models were created from the observed data by a buoy of Korea Meterological Administration(KMA). The sensitivity of the ship signature against the climate variables such as air temperature, sea temperature, relative humidity has been studied as well. The seasons which show extreme(max, min) skin signature change by whether the washdown is applied or not. The sensitivities of the air temperature and the sea temperature for a dry-ship reversed by applying the washdown on the ship surfaces.

Mariner's Performances and the Behavior Fluctuation Affecting Navigational Safety

  • Kim, Tae-Goun;Kobayashi, Hiroaki;Song, Chae-Uk
    • Journal of Navigation and Port Research
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    • v.36 no.4
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    • pp.279-284
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    • 2012
  • This study aims to identify the degree of safety when mariners take their actions in several different situations. We have carried out many experiments to observe mariners' behavior and then measured the safety level based on their actions to avoid dangerous situations of ships collision. One of the most important actions that mariners have to take, either as their daily routine or when they are in a collision situation and then want to avoid that situation is the lookout. In this paper, behaviors on the lookout have been defined as a standard sequence of three steps which are "time of first detection", "time of recognition as risky vessel" and "time of starting avoiding action", and the suitability and applicability of the definition have been shown. And also we propose the risk assessment on ships collision and the recommendation for reducing ships collision at sea. Some analyzing results and the application of the results are reported. By combining these knowledge and some systematic studies, we propose the risk assessment on ships collision and the recommendation for reducing ships collision at sea.

China's Maritime Strategy (중국의 해양전략)

  • Lee, Won-Bong
    • The Journal of Information Technology
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    • v.12 no.1
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    • pp.35-56
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    • 2009
  • After Chinese reforms and market opening, China actively started working on ways to attach importance to the ocean and it's maritime strategy has been developed and carried out by external and internal factors. We can take two things as external factors attributed to China's marine strategy. The first one is maritime environment change in the East Asian region and the second one is the strategic importance of Taiwanese Straits and the South China Sea. And we can take about national strategy, security strategy, and change of foreign policy as internal factors. China recognizes the ocean as a major step to achieve a goal of national development. The main goal of China's marine strategy in the 21st century is to secure marine transportation and marine resources and to make peaceful maritime environment in the ocean to keep up with their economic development by opening itself to the world. China has strengthened their defense abilities to act against threat of national security by modernizing sea forces and increased national power by building up the marine power. It is expected that China will continue to seek more aggressive maritime strategy on matters of national security as well as pour heir efforts into making economic development and obtaining energy resources. This will also be one factor making new dynamics between countries in and around the East Asian region.

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