• 한국해양공학회지
• /
• 제27권1호
• /
• pp.51-58
• /
• 2013

Recently, there has been an increase in the demand for natural gas as a source of clean energy, which has increased the demand for LNG carriers. However, LNG carriers require a capital investment to obtain equipment for the regasification process, which prevents fires and explosions. Thus, on account of NIMBY, a CNG carrier is suggested that eliminates the need for regasification equipment. Meanwhile, carbon dioxide emissions are more and more regulated by international conventions such as the Kyoto Protocol. Because of this, $CO_2$ carriers have also received international attention as a methodology to transport and store $CO_2$ cargoes. Several vessels or tanks to transport and store $CO_2$ gas have been studied in various countries. This paper proposes a conceptual design for a 20ft container shaped tank to effectively transport small cargoes of $CO_2$ and CNG. The proposed pressure vessel or tank will be carried by a conventional containership or special cargo ship. The influences of the design parameters for proposed pressure vessel or tank. Including the materials, scantlings, and shape of the pressure vessel, are studied theoretically and computationally.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제12권1호
• /
• pp.784-798
• /
• 2020

This paper presents the results of research on transverse shrinkage of welded butt joints conducted according to the principles of experimental design and under production conditions for two main welding techniques used in shipbuilding (FCAW and SAW). Analysis took into account the technological and structural parameters influencing the assembly suitability of a large steel structure. The presented method of evaluation makes it possible to apply approximation formulae to predict transverse shrinkage in real sections of a ship hull. The determined predictive formulae were verified to actual transverse shrinkage measurements during prefabrication of hull sections at a shipyard as well as the equations referring to the analyzed form of deformation available in the literature.

• International Journal of Computer Science & Network Security
• /
• 제22권3호
• /
• pp.9-16
• /
• 2022

The relevance of the topic is determined by the existence of inconsistencies between economic and environmental aspects of innovative development of urban logistics infrastructure, as well as the conflict of public, state and private commercial interests in this issue. The purpose of the article is to determine the principles and effective tools for innovative development of urban logistics infrastructure, taking into account pandemic constraints. The influence of the environmental aspect on the dynamics of transport flows was analyzed in detail and characterized, the scheme of determining the optimal solution for the development of the city was proposed considering the compromise between economic and ecological interests of society, state and business entities. A scheme of innovative development of urban logistics infrastructure under pandemic constraints was also developed. Materials of the article are relevant for developers of city plans, managers of urban logistics infrastructure, employees of enterprises participating in transport and logistics markets, scientists, and doctoral students.

• Journal of Advanced Marine Engineering and Technology
• /
• 제32권7호
• /
• pp.1030-1035
• /
• 2008

Recently, the International Maritime Organization makes an effort for an effective solution against the emissions from shipping in the international maritime industry. The objective of the study was to quantify the exhaust emissions of marine heavy fuel oil in the combustion process of the spray flame. An experiment was performed to measure CO, $CO_2$, NOx, $SO_2$, ${N_2}O$, DS, SOF and the other components with the flame temperature. The sampling probe was directly set up in the flame fields at each position of 103, 324, 545, 766 and 987mm vertically apart from the fuel-injected nozzle in the burner furnace. From the results of the study, it was estimated that approximately 270ppm of oxides of nitrogen (NOx), $1000{\sim}1400ppm$ of sulfur dioxide ($SO_2$), 8ppm of nitrous oxide (${N_2}O$), $2.0{\sim}2.5g/m^3$ of particulate matter (PM) divided with dry soot (DS) and soluble organic fraction (SOF) and $60{\sim}80mg/m^3$ of sulfuric acid. With respect to further development of this work, the emission quantification could also be applied to assessing emission reduction from the international shipping.

• 디지털산업정보학회논문지
• /
• 제5권2호
• /
• pp.199-208
• /
• 2009

Mosts of export/import cargo has been moving using maritime transport means. Korea had been driven the system automation project using EDI document since the mid-1990s. However, this automation system comes upon about 40-50% against overall maritime business process, manual or paper document processing work is existing as ever. International e-business environment also has changing into electronic form document transaction from paper document-based transaction. International standardization organization, UN/CEFACT proposed UNeDocs for paperless jtransaction. UNeDocs is a specification to define XML data model as well as electronic form. With UNeDocs, it is not necessary to generate the duplexed data, and it can support user convenient and guarantee the flexibility. This paper defines the UNeDocs data model for EDI and Off-Line processing at the current maritime business. Then, it have to check XML syntax and structure for the defined data model through quality of document check system. Also, it explains the applying plan about the defined UNeDocs data model. It is possible to support paperless transaction as defining UNeDocs-based standard data model and converting into paper document, XML and EDI document using UNeDocs data model.

• 통상정보연구
• /
• 제16권4호
• /
• pp.125-150
• /
• 2014

국제해상운송에서 위험화물의 운송량은 꾸준하게 증가하고 있다. 이에 따라 각 국제협정들도 위험화물에 대한 규정을 신설하거나 개정하고 있는 추세이다. 특히 연료와 같은 위험화물의 운송은 필연적으로 발생할 수밖에 없기 때문에, 위험화물에 대한 정의와 범위에 대한 중요성이 부각되고 있다. 또한 위험화물에 대한 당사자 간의 책임이 위험화물에 대한 통지와 운송인의 인지여부에 따라 상이하게 나타나고 있으며, 이와 관련된 판결들이 사건별로 다양한 형태로 나타나고 있다. 특히 운송규칙의 책임조항에서 위험화물에 대한 운송인의 인지여부에 따라 송화인의 책임과 면책 범위가 상반된 형태로 나타난 것을 살펴볼 수 있었다. 본 논문에서는 먼저 선행연구를 통하여 위험화물의 정의와 범위를 분석하였다. 두 번째로 운송인의 위험화물 인지여부에 관한 판결들에 대한 분석을 통하여 통일성 있는 조항 해석의 필요성을 살펴보았다. 위험화물은 특별한 특징을 가진 화물로서 당사자 간의 책임과 면책에 대해서 일반조항과 달리 해석되어질 필요가 있다. 일반화물일 경우 단순히 과실여부에 따라 책임을 물을 수 있고, 당사자 간의 의무의 범위가 구체적으로 정해질 수 있다. 하지만 위험화물일 경우에는 당사자 간의 구체적인 조항이 명시되지 않는다면, 위험에 따른 의무를 부담해야 할 당사자가 상황에 따라 누구의 책임인지 혼란을 야기할 수 있다. 따라서 위험화물의 인지여부에 관한 판례들을 분석함으로서 위험화물조항의 적용을 위한 통일적인 기준의 필요성과 해결방안을 제시하였다.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제3권4호
• /
• pp.233-241
• /
• 2011

The article describes actions and strategies to obtain higher productivity on maritime automobile terminals. The main focus is on elaboration of efficient and effective organizational structure to model and implement short-term, mid-term and long-term strategies. In addition, with an empiric approach we combined the analyses of current findings in important scientific papers and our acknowledgments in practical research of north Adriatic maritime automobile terminals. The main goal is to propose actions towards increasing system's productivity. Based on our research of the north Adriatic maritime automobile terminals and with Lambert's model an in-deep analysis of limiting factors, user's expectations and possibilities for productivity increase has been performed. Moreover, with our acknowledgments a three-level decision-support model is presented. With an adequate model implementation it is possible to efficiently develop and implement different strategies of productivity measurement and productivity increase, especially in the fields of internal transport productivity, entrance/exit truck gates operations and wagon manipulations. According to our observation a significant increase might be achieved in all three fields.

• 무역학회지
• /
• 제48권2호
• /
• pp.175-195
• /
• 2023

해상운송은 개별 국가만이 아니라 세계 경제에 높은 영향력을 미치며, 글로벌가치사슬(GVSc)을 통한 분업 실현에 이바지 하고 있으며 이러한 국제분업 활동은 일상화되어 있다. 해상운송업 사이에도 국제분업을 통한 글로벌 가치사슬(GVSs)이 존재하며 국가 간 해상운송업 사이 혹은 관련 산업 사이에도 거래관계가 발생해 상호 연관구조가 긴밀한 국가들이 있다. 이에 본 연구에서는 아시아개발은행(ADB)에서 1년 단위로 발표하는 국제산업연관표(WIOT)을 이용하여 63개 국가 중에서 세계 30대 선박 보유국 안에 포함되면서 수상운송업의 총 산출액이 높은 14개 국가를 대상으로 수상운송업 간의 상호 연관구조를 분석하였다. 분석을 통해서 우리나라 수상운송업과 높은 연관구조를 가진 국가와 우리나라 수상운송업의 특징을 확인하였다. 분석 결과 우리나라는 투입구조에서 국산 중간재비중이 약 70%로 유럽의 주요 해운 국가 대비 국내산 이용 비율이 높았다. 하지만 2000년 이후로 꾸준히 국외 중간투입이 증가하면서 국외 산업과 연관구조가 높아졌으며, 발생하는 부가가치는 하락하였다. 줄어드는 부가가치에 비해 국내 산업으로 생산유발계수는 크게 변화가 없어 같은 금액 투자에도 국내에 미치는 경제적 영향은 줄어든 것으로 평가되어 해운산업의 부가가치를 높이기 위한 정책적인 방안이 필요한 것으로 생각된다. 우리나라 수상운송업과 높은 연관구조를 가진 국가는 투입구조 상에서는 미국(USA), 배분구조에서는 싱가포르(SIN), 일본(JPN) 순으로 해당 국가의 생산활동에 높은 영향을 받는 것을 확인하였다. 생산유발계수를 통한 연관구조를 보면 우리나라 수상운송업과 높은 연관구조를 가진 국가의 수상운송업은 싱가포르(SIN)이다. 싱가포르(SIN)는 유럽 항로의 중간지역으로 우리나라 수상운송업과 상호 간에 높은 생산유발효과를 주고받는 것을 확인할 수 있었다.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2011년도 춘계학술대회
• /
• pp.417-418
• /
• 2011

Mongolia is an inland country contained between East and Central Asia. I t borders Russia to the north and China to the south, east and west. Mongolia uses as international port for transit Xindang/Qingdao by railway. For domestic transport, our options are varied, which include road, railway and air modes. Mongolia's government enacted some shipping ways to develop logistics around the world. ${\cdots}\;{\cdots}$ (omit).

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제12권1호
• /
• pp.541-551
• /
• 2020

Based on the trend, there have been numerous researches analysing the ship collision risk. However, in this scope, the navigational conditions and external environment are ignored or incompletely considered in training or/and real situation. It has been identified as a significant limitation in the navigational collision risk assessment. Therefore, a novel algorithm of the ship navigational collision risk solving system has been proposed based on basic collision risk and vulnerabilities of marine accidents. The vulnerability can increase the possibility of marine collision accidents. The factors of vulnerabilities including bad weather, tidal currents, accidents prone area, traffic congestion, operator fatigue and fishing boat operating area are involved in the fuzzy reasoning engines to evaluate the navigational conditions and environment. Fuzzy logic is employed to reason basic collision risk using Distance to Closest Point of Approach (DCPA) and Time of Closest Point of Approach (TCPA) and the degree of vulnerability in the specific coastal waterways. Analytical Hierarchy Process (AHP) method is used to obtain the integration of vulnerabilities. In this paper, vulnerability factors have been proposed to improve the collision risk assessment especially for non-SOLAS ships such as coastal operating ships and fishing vessels in practice. Simulation is implemented to validate the practicability of the designed navigational collision risk solving system.