• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2003.05a
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• pp.147-156
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• 2003

In order to improve navigational safety of ships, on ocean wave prediction model of high precision within a short time, dealing with multi-directional random waves from the information of the sea surface winds encountered at the planned ship's course, was introduced for construction of ocean wave forecasting system on the ship. In this paper, we investigated a sea disaster occurred by a stormy weather in the past. We analyzed the sea surface winds first and then carried out ocean wave hindercasting simulations according to the routes of the sunken vessel. From the result of this study, we concluded that the sea disaster was caused by rapidly developed low pressure system in Okhotsk Sea and the predicted values by the third generation wave prediction model(WAM) was agreed well with the observed significant wave height, was period, and directional wave spectrum. It gives a good applicability for construction of a practical on-board calculation system.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.62-63
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• 2009

A monitoring system of collision risk among multiple ships is newly-designed in order to reduce human error and make vessel traffic control more effective. By using AIS data as ships' navigational information, an estimation algorithm of collision risk among multiple ships is newly-designed. To consider ships' course of now and future, collision risks of multiple ships can be calculated by using fuzzy algorithm. To test the performance of new algorithm, replay simulations are carried out on actual AIS data collected from VTS center of Ulsan harbor in Korea. The AIS data include 25 ships' information for two hours. In this paper, the features of newly-designed estimation algorithm of collision risk and the results of replay simulation are discussed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.180-181
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• 2009

This paper is to find the priority of logistics technology development per each field by AHP(Analytic Hierarchy Process) for policy establishment of logistics technology, finding of logistics technology projects. And study on the use actual condition between Consumer and developer in Logistics Technologies. For this study, Survey for logistics technology concerning user's demand and the developer's logistics technology development. And Gap analysis between user and developer in logistics technology development.

• Journal of Navigation and Port Research
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• v.37 no.4
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• pp.439-445
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• 2013

Domestic large group logistics company(2nd-party logistics company)has made inroads on large portion of domestic logistics market, whereby the domestic 3rd-party logistics market has been shrinking every year to a level of 30% or so. Global logistics enterprise is steadily increasing 3rd-party global market portion while Local one facing with stagnating growth has very minimal level in the global market share. Fortunately new government strengthening policy change toward local SME and also recent UN's supplying line enlargement to Asia regions are positive factors which make Local SME very positive environments to advance to UN procurement logistics market. On this occasion, the purpose of this paper is to help local logistics company perform successful bidding through study of UN-transportation case and also suggest in SWOT analysis a segmented measure and support policy between Industry, Academia, Government and Institute.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06b
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• pp.241-246
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• 2006

This paper describes two kinds of personal hand-held electronic devices to support marine leisure safety. The one is Radar response-type safety device triggering by the pulse signal from a commercial 9GHz-band Radar to provide quick search and rescue with combined civilian-government-military fleets. The other one is M-RFID (Marine Radio Frequency IDentification) based safety electronic device using 900MHz Tx/Rx with spread spectrum frequency hopping and GPS. Through the field tests at sea using Korea Coast Guard's warship the operating performances are verified. Further plan for practical use of each device was also discussed.

• Journal of Navigation and Port Research
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• v.39 no.6
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• pp.515-521
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• 2015

The purpose of this study was to analyze the weights of obstacle factors against mutual access of towed trailers of car-ferry between South Korea and China using Fuzzy-AHP. To this end, factors were first selected through literature research and finally selected through in-depth interviews with a group of experts in cargoes who are currently in car-ferry companies. Selected high rank obstacle factors included unstable service provision, limited policy support, and additional costs being incurred and among them, unstable service provision was identified as the most serious obstacle factor through analysis. Eleven measurement variables selected include insufficient supply of container yard, trailer insurance and management issues, insufficient special equipment, insufficient specialized manpower, limited input service courses, insufficient marketing and public relations strategies, and increasing transportation costs and among them, increasing equipment returning costs due to unbalanced cargo gathering were identified as the most serious obstacle factor through analysis followed by limited input service courses, insufficient special equipment, delays in procedures, and occurrence of additional procedures in order of precedence.

• Journal of Navigation and Port Research
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• v.36 no.8
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• pp.599-605
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• 2012

As vessels are faster and bigger, higher safety navigation techniques have been required. In marine traffic area, buoy is to be one of the most important equipment, so that it should be built stable and robust. Verification in design level is good to accomplish it. This paper tries to implement visual program to confirm the external stability, which shows the movement on water by external factors such as wind, tide and current. Considering further requirements for additional influences or functions, design architecture for program introduces the concept of software component. Using Quest3D as the graphic tool, visual programming with software component concept can be implemented.

• Journal of Navigation and Port Research
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• v.34 no.1
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• pp.45-50
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• 2010

After September 11 attacks, as recently the range about security of physical distribution is rapidly spreading temporally & spatially, and it considers that the demand of understanding about logistics company is more than that of the past, now is the time that to establish policy for a comprehensive and systematic support policy that targets the entire supply chain considering the competitive of logistics beyond the responsibility for security of the field of import and export simply. In this respect, this study has identified recognition of domestic logistics company about global logistics security system that has recently been implemented in the country, and this level of recognition has really examined what is the impact of its logistics competitiveness and an intention to invest in related areas in the future. Based on this, this study has also proposed the supporting promotion and education for the expansion of logistics security of government & related agencies and effective way promoting to establish policies regarding this.

• Journal of Navigation and Port Research
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• v.33 no.1
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• pp.71-78
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• 2009

Through the study of precedent researches, this study classified the influential factors of knowledge sharing intention into the support of CEO, self-worth, trust, and incentive. Then, this study conducted a survey among the workers, who are in maritime and port sectors, to illuminate how the forementioned variables influence on the knowledge sharing intention and the usage of knowledge management system The analysis of the result illustrated that the support of CEO, self-worth, trust appeared to be the influential factors of knowledge sharing intention, and that incentive and the knowledge sharing intention appeared to influence the usage of knowledge management system. This study aims to contribute to proposing a successful forthcoming implementation of a knowledge management system, by suggesting the influential factors to increase its usage to the maritime and port organizations planning to implement it before they actually installs it.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.10a
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• pp.79-81
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• 2012

The concern of Global warming and greenhouse gas emission has been issuing so many countries are trying to establish environmental friendly logistics policies. With this trend, several technical and operational methods are developed to realize green logistics way. In Korea, government promoted converting LNG cargo vehicles and constructed LNG station at Dajeon, Pohang, Gwangyang, Incheon, and Donghae as a national project. In spite of economic and environmental advantages, this project was not successful enough, even the project was cancelled. So, this paper seeks the reason why the project was failed and find if there were enough capacity and numbers of LNG stations, then analyze the problem.