• 한국항해항만학회지
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• 제30권7호
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• pp.591-598
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• 2006

Port development has been remarkably increasing due to the progress of industrialization in ASEAN area. Especially, Vietnam has increased the international physical distribution in this area rapidly. The main issues facing decision makers at container terminals in Vietnam are how to expand the existing container terminals and construct new container terminals. In this paper, we performed the basic design based on simulation analysis in order to support the expansion of Quy Nhon port in Vietnam as a case study. The preliminary capacity analysis was conducted on the one berth at the port to analyze the scale of C/C(Container Crane)and yard area. Alternative scenarios were created based on the preliminary capacity analysis and the detailed simulation analysis was conducted for supporting the scenarios.

• 한국해양공학회지
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• 제18권6호
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• pp.101-107
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• 2004

In this paper, the design criteria of future container crane for megaships are investigated. The current loading/unloading capacity of a typical container crane, roughly 30 moves/hr, is too law to meet the requirements of future super containerships, which are expected over 15,000 TEU. After examining the transition of containerships through the years and studying the research trend in developed countries, the specifications of the container crane that can Meet a 15,000 TEU containership are proposed. The structure, trolley and hoist mechanism, outreach, backreach, capacity, speeds, durability, and stability of the future container crane are described.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 Asia Navigation Conference
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• pp.193-202
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• 2006

Port development is remarkable increased due to the progress of industrialization in ASEAN area. Especially, Vietnam has increased the international physical distribution in this area rapidly. The main issues facing decision makers at container terminals in Vietnam are how to expand the existing container terminals and construct new container terminals. In this paper, we performed the basic design based on simulation analysis in order to support the expansion of Quy Nhon port in Vietnam as a case study. The preliminary capacity analysis was conducted on the one berth at the port to analyze the scale of C/C and yard area. Alternative scenarios were created based on the preliminary capacity analysis and the detailed simulation analysis was conducted fur the scenarios. And in order to establish the marketing strategy, we classified the marketing elements by industrial environment and performed SWAT analysis of the port.

• International Journal of Naval Architecture and Ocean Engineering
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• 제9권3호
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• pp.339-349
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• 2017

This paper is related to structural design evaluation of 19,000 TEU ultra large container ship, dealing with hydroelastic response, i.e. springing and whipping. It illustrates application of direct calculation tools and methodologies to both fatigue and ultimate strength assessment, simultaneously taking into account ship motions and her elastic deformations. Methodology for springing and whipping assessment within so called WhiSp notation is elaborated in details, and in order to evaluate innovative container ship design with increased loading capacity, a series of independent hydroelastic computations for container ship with mobile deckhouse and conventional one are performed with the same calculation setup. Fully coupled 3D FEM - 3D BEM model is applied, while the ultimate bending capacity of hull girder is determined by means of MARS software. Beside comparative analysis of representative quantities for considered ships, relative influence of hydroelasticity on ship response is addressed.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1998년도 추계학술대회논문집:21세기에 대비한 지능형 통합항만관리
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• pp.271-285
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• 1998

This paper aims to suggest the strategies for Korea port, especially Busan to develope into a viable transhipment center and/or Hub port as the articulation points between mainline and feeder nets. To tackle this goal, the authors clarify the requirements for Korea port which will be critical in determining its position as Hub through the careful analysis on competitiveness, environmental impact, port policy and capacity, transhipment traffic and inherent ablity to generate traffic. The results are summerized as follows. (1) Coping with increasing container volumes, new investment is sustainedly necessary to increase the capacity and inherent ability of container port and create economies of scale. Moreover, increasing port capacity will increase the potential for the Korea port's inclusion into mainline rather than feeder networks. (2) Considering an increasing awareness of need for customer-oriented option s and service quality rather than simply a reliance on infrastructure-led efficiency, privatization of one sort or another and corporation of port have been key strategies in achieving greater efficiency in Korea containerport.

• 한국항만학회지
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• 제12권2호
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• pp.161-176
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• 1998

This paper aims to suggest the strategies for Korea port, especially Busan to develope into a viable transhipment center and/or Hub port as the articulation points between mainline and feeder nets. To tackle this goal, the authors clarify the requirements for Korea port which will be critical in determining its position as Hub trough the careful analysis on competitiveness, environmental impact, port policy and capacity, transhipment traffic and inherent ability to generate traffic. The results are summerized as follows. (1) Coping with increasing container volumes, new investment is sustainedly necessary to increase the capacity and inherent ability of container port and create economies of scale. Moreover, increasing port capacity will increase the potential for the Korea port's inclusion into mainline rather than feeder networks. (2) Considering an increasing awareness of need for customer-oriented operations and service quality rather than simply a reliance on infrastructure-led efficiency, privatization of one sort or another and corporation of port have been key strategies in achieving greater efficiency in Korea containerport.

• 한국항해학회지
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• 제15권3호
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• pp.13-24
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• 1991

This paper aims to determining the optimal capacity of Pusan port in view point of Container Physical Distribution cost. It has been established a coast model of the container physical distribution system in Pusan port is composed of 4 sub-systems and in-land transport system. Cargo handling system, transfer & storage system and in-land transport system, and analyzed the cost model of the system. From this analysis, we found that the system had 7 routes including in-land transport by rail or road and coastal transport by feeder ship between Pusan port and cargo owner's door. Though railway transport cost was relatively cheap, but, it was limited to choose railway transport routes due to the introducing of transport cargo allocation practice caused by shortage of railway transport capacity. The physical distribution ost for total import & export container through Pusan port was composed of 4.47% in port entring cost, 12.98% in cargo handling cost, 7.44% in transfer & storage cost and 75.11% in in-land transport cost. Investigation in case of BCTOC verified the results as follows. 1) The optimal level of one time cargo handling was verified 236VAN (377TEU) and annual optimal handling capacity was calculated in 516, 840VAN(826, 944TEU) where berth occupancy is $\rho$=0.6 when regardless of port congestion cost, 2) The optimal level of one time cargo handling was verified 252VAN (403TEU) and annual optimal handling capacity was calculated in 502, 110VAN (803, 376TEU) where berth occupancy is $\rho$=0.58 when considering of port congestion cost.

• 한국항해항만학회지
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• 제48권1호
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• pp.62-77
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• 2024

해상운송 산업에서는 공급과 수요의 불균형이 지속적으로 증가하면서 세계 주요 해운선사들이 해운 시황에 따른 선복량을 탄력적으로 조절하기 위해 블랭크 세일링을 주요 수단으로 사용하고 있다. 일반적으로 블랭크 세일링은 중국의 춘절 기간에 맞추어 많이 실시되어 왔지만, 2020년부터 시작된 글로벌 팬데믹과 미국·중국 간 무역 전쟁 등과 같은 특수한 상황으로 인해 최근 해운선사들은 기존 대비 큰 규모의 블랭크 세일링을 실시하였다. 이러한 블랭크 세일링은 화물 운송 지연에 직접적 영향을 미치기 때문에 기업과 소비자의 측면에서 부정적인 영향을 초래할 수 있다. 따라서 본 연구는 이에 선제적으로 대응하기 위해 포아송 회귀모형과 음이항 회귀모형을 활용하여 해상운임 결정요인이 해운선사의 블랭크 세일링에 미치는 영향력을 분석하였다. 분석 결과, 포아송 회귀분석의 2M의 경우 유의한 변수로 글로벌 컨테이너 해상물동량, 컨테이너 선복량, 컨테이너선 해체량, 컨테이너선 신조선가지수, OECD 인플레이션을 도출하였고, 음이항 회귀분석의 Ocean Alliance의 경우 글로벌 컨테이너 해상물동량과 컨테이너선 발주량을, THE Alliance의 경우 컨테이너선 선복량과 금리를, Non-Alliance의 경우 국제유가, 글로벌 공급망 압력지수, 컨테이너선 선복량, OECD 인플레이션을, Total Alliance의 경우 컨테이너선 선복량과 금리를 유의한 변수로 도출할 수 있었다.

• 한국항만경제학회지
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• 제17권1호
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• pp.27-51
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• 2001

The purpose of this paper is to investigate the productive efficiency of world container ports by using the DEA (Data Envelopment Analysis) method and raw data from previous research in measuring the international competitiveness of world container ports. Ports have to cope with rapid changes in shipping environments. In order for a port to compete in the global market, it must provide port services promptly and accurately. Basically, there are two approaches to measuring the international competitiveness of a container port. First, there is the traditional productivity analysis method, which analyzes productivity based on the container port's facilities (efficiency, selectivity, land availability), and by its general capacity (handling ability, storage capacity, terminal productivity). Second there is multi-attribute utility analysis, which considers several elements including the reasons for selecting particular container ports and factors determining international competitiveness. This paper follows the first method (traditional productivity analysis) and extends the limitation of previous studies by using the DEA method newly, and suggesting: the relative productive efficiency of container ports. The main results of this paper are as follows: First, the results of the DEA analysis in terms of world container ports matches that of a previous study (Jun et al., 1993) at a level of 35%. The low ratio is due to the constrained set of input-output elements, the result of only twenty container ports being analyzed in this paper. Second, the result of the DEA analysis in terms of North-East Asia's container ports matches with that of a previous study (Ha, 1996) at a level of 100 percent. Therefore we can conclude that the DEA analysis is the best measurement method for international competitiveness. Policy implications for this study are as follows: First, when port authorities want to measure the international competition power of container ports and enhance their productive efficiency, they should consider the traditional method and newly introduce the DEA method. Second, according to the analysis results of the DEA method, pen authorities should recommend benchmarking ports as reference ports in order to enhance the productive efficiency of container ports that show an efficiency score of below 1.

• 한국가스학회지
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• 제5권2호
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• pp.22-29
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• 2001

체적거래제에 의하여 소규모 공동주택에 가스를 공급하기 위하여 적절한 용기설치수의 결정 및 용기교체시기에 대한 검토가 필요하다. 그러나 지금까지 국내에 축적된 자료가 없을 뿐만 아니라 용기 설치수의 결정과 용기수 및 가스사용 형태에 따라 용기교체시 남아 있는 액화석유가스 양에 대한 이론적 검토가 없었다. 따라서 본 연구에서는 자연기화능력, 잔량, 용기의 온도, 용기내부 압력 등을 시뮬레이션으로 살펴보았다. 용기표면으로부터 액화석유가스 용기의 총괄 열전달계수의 변화에 따른 자연기화량 변화는 크지 않으며, 실험으로부터 구한 값은 약 $9{\~}13 kcal/m^2{\cdot}hr{\cdot}^{\circ}C$이었다. 그리고 액화석유가스 용기내부의 압력이 압력조정기의 압력조정 하한계에 도달하였을 때 가스방출 유량은 공기로부터 전달되는 열량과 균형을 이루는 일정한 값으로 급격히 감소하였다. LP가스용기의 자연기화능력은 외기온도 및 프로판의 조성에 따라 증가하였고, 연속사용시간에 따라 초기 급격히 감소하여 일정한 값으로 수렴하였다. 한 가구당 용기수는 자동절체기 사용에 의하여 감소시킬 수 있는 것을 알 수 있다.