• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.2
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• pp.314-323
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• 2022

Vessel Traffic Services (VTS) operators perform traffic management tasks using VTS systems and sensor equipment designated as VTS facilities to promote the safety and efficiency of vessel traffic. The necessary VTS information for effective operations could be obtained through the additional access of various information channels other than the designated VTS facility. To unify these various information access windows, the development of the VTS cloud system is in progress. In this study, the operational information analysis for VTS was performed through VTS tasks-facility linkage analysis to identify the user required information according to the introduction of the VTS cloud system. The VTS task analysis was performed through research of the international and domestic literature, and expert interviews. The necessary information were identified and linked according to the VTS facilities. As a result of the analysis, 37 categories of necessary information were identified for internal and external information windows, and 8 information windows were selected other than the present VTS equipment. The identified user requirements would be applied to the structure design of the VTS cloud system. In the future, it is necessary to update user requirements through scenario-based user operation analysis and to conduct additional research on the system interface design.

• Transactions on Electrical and Electronic Materials
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• v.16 no.6
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• pp.323-327
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• 2015

In this paper, parameters related with partial discharge (PD) were analyzed in SF₆ gas under AC and DC voltages. Three electrode systems (protrusion on conductor, protrusion on enclosure, and free particle) were fabricated to simulate PD defects in a gas-insulated switchgear (GIS). All electrode systems were filled with SF₆ gas at 0.5 MPa. PD pulses were detected using an oscilloscope and a data acquisition (DAQ) based on IEC 60270. To analyze the PD characteristics under AC and DC voltages, parameters such as discharge inception voltage (DIV), discharge extinction voltage (DEV), pulse magnitude, repetition rate, and T-F map were compared. From the experimental results, PD was revealed to have different characteristics under AC and DC, and these results may be useful for diagnosis of power facilities operated under HVDC.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.04a
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• pp.494-506
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• 2010

On the crisis of international economy, the government is making an effort to seek economic growing motivation with the method of overcoming economic crisis and 'low carbon green growth'. Furthermore, to promote maritime vessel traffic service related inefficient energy wastage was revealed and eco-friendly alternative energy was accepted because of high price of oil in the beginning of 2008. In this situation, I'm going to discuss the possibility of eco-friendly energy system in maritime vessel traffic service with the way of cutting the budget and expansion of solar power generation system which was promoted to meet governmental 'energy saving plan for high price of oil'.

• Journal of Fisheries and Marine Sciences Education
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• v.26 no.5
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• pp.941-958
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• 2014

Today the educational authorities selected 38 Meister High Schools which are based on industry demand out of 691 high schools nationwide to make the vocational high schools do their original purposes and to innovate vocation education. The purposes of this study are to analyze the relationship between the school environment and career maturity and the school adjustment resilience and, based on the results, to suggest improvement plans to improve business environment for the maritime Meister High Schools. To analyze the influence of the school environment and students' career maturity on their school adjustment resilience, the researcher used the teachers's professionalism, school facilities, students' entrance motivation, career guidance depending on the individual and the school meal quality as the school environment factors of the independent factors. As dependent factors, the researcher selected school environment, teachers, class preparation of the individual, level of school life such as an attitude level and school rule observance, and peer relation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.29 no.1
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• pp.3-9
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• 2005

This paper is aimed to analysis the logistics system of the Jeju island. Jeju island has a special feature about logistics system different from inland. In recent gradually increase of the jeju freight volumes but it has some problems about the port facilities shortage. We try to find the problems of the jeju and propose that an improvement plan.

• Journal of Korea Ship Safrty Technology Authority
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• s.32
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• pp.57-71
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• 2012

Recently, the navigation risk is increasing significantly with growing of vessels' volume and propelling marine facilities, water bridges and port development etc. At this point of time, the Ministry of Land, Transport, and Maritime Affairs introduced the Maritime Safety Audit(MSA) in amendment of the Korea Marine Traffic Law. audit results were survey for the last two years. As a result, appropriate certificate appears 11% among audit report, is an urgent need for improved quality of audit reports. This study is aimed to propose about Audit Personnel Education & Training System. To these solve, this paper analyzed the tendency of Audit Personnel Training. And also the opinions of user and experts were investigated and analyzed using Questionnaire survey methods. As a result, this paper was suggested, the construction of Audit Personnel Training System and the curriculum and training contents for 5-days of basic course, 2-days of expert course, 3-days of Qualification Maintain course.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.10 no.6
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• pp.273-286
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• 1985

Nowadays, the satellite communication systems provide worldwide or international service through organizations such as INTELSAT and INMARSAT, and the satellite communication technology has brought remarkable changes in the maritime mobile service as well as the fixed service on land. In our country, the international fixed satellite service via INTELSAT is no means inferior to the advanced countries, but to the contrary, we feel ashamed to admit that the facilities and technologies of our maritime satellite service via INMARSAT system donot keep abreast with the development pace of the world. This paper describes first the historical review of the development of satellite communication system is the world, then analyses the problems to bring the systems into wider use as early as possible, and filnally, I will make the following suggestions for the promotive direction on the INMARSAT systems. 1. Estabilishment of the earth stations at sea and on land. 2. Standardization of the qualification of the principal communicator on board. 3. Promotion of the international cooperation for the maritime mobile satellite service. 4. Establishment of the research institute on the INMARSAT systems.

• Journal of Advanced Marine Engineering and Technology
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• v.31 no.5
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• pp.583-591
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• 2007

This paper reports the performance of a 150W PV-wave hybrid system with battery storage in buoy. This system was originally designed to meet a new hybrid ower system for buoy in Korea. In the case or lighted buoys and lighthouses, a light failure alarm system of wireless radio is attached so that light failures are immediately notified to the office. At lighthouse offshore fixed lights and light buoys where commercial electricity is not available, the power source depends on solar system and batteries. This power system has a various problems. Therefore energy derived from the sunshine, wind and waves has been used as the energy source lot aids to navigation. Recently a hybrid system of combining the solar, wind and the wave generator is a favorable system lot the ocean facilities like lighthouse and buoy. The hybrid system in this paper is intended for variable DC load like light, communication system in the buoy and includes a PV-wane generation system and battery. This is composed a high efficiency charging algorithm, switching converter and controller. This paper includes discussion on system reliability, power quality, and effects of hybrid system in the buoy. Simulation and experimental results show excellent performance.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.2
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• pp.417-427
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• 2016

It is provided that the seaman should be educated and trained by basic fire-fighting to save the life and protect asset at sea by the STCW(The International Convention on Standard for Training, Certification and Watchkeeping). The designated seaman's safety educational institution which is specified in the nation has held a basic and advanced fire-fighting education for the seaman. The interest of safety at sea has been increasing due to recent huge maritime disaster and there is a tendency to strengthen the safety education for the seaman in the nation. For the effective fire-fighting education for the seaman, the appropriate educational content and facilities are required. Moreover, It is necessary to apply an effective education and training methods for achieving the goal. Unfortunately, this paper has not perfectly been conducted to improve effective safety training in the designated educational institutions which held the seaman's maritime safety educations. From now on, we should consider the effective educational ways for the seaman. The purpose of this paper is to develop the education and training model of STCW seaman's fire-fighting education through the reviewing the status of safety education in the nation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.132-133
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• 2013

Ship salvage crane is to salvage the equipment safely, this type of crane in the shipyard's large ships or port is being used a lot of container etc. Such a salvage crane was installed on the land and it is built to use the harbour facilities. In this paper, the response amplitude operator and the wave exiting force of floating type salvage crane is calculated and it is performed to structural response estimation.