• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06b
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• pp.5-11
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• 2006

Urinalyses have been conducted for 28 seamen in K University's training ship and Creatine and Uric acid turned out to be higher in all ages, which can be inferred that on-deck environment has caused negative impact on kidney and/or malfunction. In addition, TC arid HDL-C, LDL-C has decreased, however, TG has increased after the navigation. All different positions including oater, crew, decker, engineer and radio part showed the similar pattern. TC and HDL-C has decreased in 30s, 40s and TG has increased in 30s. A few of the 30's show extremely high TG rates so Hyperlipidemia is suspected. 7 members fumed out positive for UBG test and 5 positive for PRO test. Especially there was only one UBG positive before the navigation but, 7 members has become positive, which means the one-month ocean navigation has definite impact on the liver cell function.

• Journal of the Korean Society of Marine Environment & Safety
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• v.21 no.4
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• pp.409-420
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• 2015

In this study, I researched, analysed and compared the examples of civilian maritime search and rescue auxiliaries of world leading countries' such as Japan and America, and the Korean volunteer fire fighting team. Through this, I suggest that the decentralized civilian maritime search and rescue forces of Maritime Rescue and Salvage Association and KCG Civilian Auxiliary should be united into unified search and rescue system and establish legal basis for stabilized support and development. It seem that we should organize laws and regulations for the government to have centralized control of rescue mission as in the cases of America and Canada and elivate rescue mission capability with systemized education and training entrusted to specialized external training organization. I proposed to establish financial support such as fund for the stabilized status of civilian auxiliary, domestic and overseas training session for the civilian auxiliary to inspire integrity and sense of duty as a part of maritime search and rescue forces.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.1
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• pp.137-147
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• 2017

An accident during pilotage may cause several problems such as crippling the harbour function, environmental disruption, loss of life. Since the pilot plays an important role in the safe operation of the port, securing their safety is directly connected to the vessel's safety coming into port in Korea. Pilotage service is offered on request without distinction of day and night. And traveling by helicopter and boarding/disembarking using a pilot ladder from and to a pilot boat have a high risk of falling into the sea. So, pilots can fall into the sea while boarding/disembarking from ship which can lead to serious injury by cardiac arrest. A number of pilots have died or severely injured due to fall from the pilot ladder during embarkation and disembarkation up to now. Current safety measures at embarkation and disembarkation required by pilotage act and IMO resolutions could not prevent all the pilot related accidents. Therefore, to prevent pilot accident during boarding/disembarking from ship, it is necessary to include safety training requirement for new pilots under the requirements for licensing of pilotage act. It is also necessary to compel pilots to take necessary personal protective equipment when they use a pilot ladder. In addition, the placement of emergency kit on pilot boats and first-aid training are required in order to deal with emergency situation promptly.

• Journal of the Korean Society of Marine Environment & Safety
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• v.17 no.2
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• pp.137-142
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• 2011

Navigational charts in Korea have been increasingly published in line with the development of harbour for 60 years without a detailed planning. Recently, charts cause inconvenience to use and make navigator confused because they have not been adjoined to adjacent chart effectively and have been to overlap with other charts of the same scale. In this paper, we propose new chart system through adjusting area of the chart and rearranging its scale. This newly proposed scheme was first designed by researchers who have on-board career, then has been verified and revised by questionnaire and pilots' opinion. As a result, total number of Korean chart could be changed from 309 to 334.

• Journal of Navigation and Port Research
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• v.37 no.2
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• pp.123-128
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• 2013

In spite of advanced navigational devices and reinforced mandatory standards of officers' education, the number of ship's accidents are increasing. The accidents caused by minor license officers are more than the number of accidents caused by superior license officers. There are many cases of collisions in the past 5 years released on Marine Accidents Inquiry Agency. Especially, officer's negligence from the consequences of the neglect of any precaution which may be required by the ordinary practice of seamen is the main reason behind ship's collisions. For reducing ship's accidents caused by human error, this paper suggests to develop effective training program using analysis date of domestic and foreign education system as a reference.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.293-295
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• 2007

해상교량의 규모 결정을 위한 선박조종시뮬레이션 표준시행 조건 및 기법(대상선박 설정, 시나리오, 시행회수, 평가기법 등)을 정립함으로써 해상교량 통항 안전성을 평가하는데 정책 결정의 혼선을 최소화 할 필요가 있다. 본 연구에서는 과거 수행된 선박조종시뮬레이션 관련 보고서 분석 및 평가를 기초로 선박조종시뮬레이션 표준안에 대한 공통점을 도출하여, 국내 선박조종시뮬레이터 보유기관 항만 이용자 및 항만 건설 관계자 등의 의견 수렴과정을 거쳐 수정 보완함으로써 선박조종시뮬레이션의 대상선박, 수행 조건, 평가기법, 시나리오 설정 등에 대한 최종 표준안을 제시한다.

• ETRI Journal
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• v.34 no.5
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• pp.696-705
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• 2012

Accurate synthesis models based on artificial neural networks (ANNs) are proposed to directly obtain the physical dimensions of an asymmetric coplanar waveguide with conductor backing and substrate overlaying (ACPWCBSO). First, the ACPWCBSO is analyzed with the conformal mapping technique (CMT) to obtain the training data. Then, a modified genetic-algorithm-Levenberg-Marquardt (GA-LM) algorithm is adopted to train ANNs. In the algorithm, the maximal relative error (MRE) is used as the fitness function of the chromosomes to guarantee that the MRE is small, while the mean square error is used as the error function in LM training to ensure that the average relative error is small. The MRE of ANNs trained with the modified GA-LM algorithm is less than 8.1%, which is smaller than those trained with the existing GA-LM algorithm and the LM algorithm (greater than 15%). Lastly, the ANN synthesis models are validated by the CMT analysis, electromagnetic simulation, and measurements.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.263-264
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• 2023

본 연구는 자율운항선박의 실제 해상에서의 성능 검증하기 위한 실험을 진행하였다. 먼저 SAS(Samsung Autonomous System)을 활용하여 시뮬레이션을 진행하였다. 시뮬레이션은 Imazu 조우 모델을 기반으로 실험을 진행하였다. 시뮬레이션에서 조우 선박은 2-4척으로 정면, 횡단, 추월 등이 뒤섞인 상황을 가정하였다. 결과 분석은 6가지 항목(속력, Heading, Rate of Turn, Collison Risk Index, DCPA, TCPA, Closest Distance, XTD(Cross-Track Distance))을 분석하였다. 2 차례의 실해역 실험을 진행하였다. 목포-제주도 구간에서 실해역 실험을 진행 후 목포-이어도-독도 항로에서 실해역 실험을 진행하였다. 실해역 실험 결과 Imazu 모델 기반 시뮬레이션과 비슷한 결과를 보였다.

• Journal of Fisheries and Marine Sciences Education
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• v.26 no.3
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• pp.498-509
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• 2014

Offshore plants is an intensive industry where real value is able to be created when EPCIC(Engineering, Procurement, Construction, Installation, Commissioning) is combined. Many universities and educational institutions have established major fields and graduate schools related in offshore construction and engineering as well as safety training and occupational courses. Most of the personnel who have graduated and passed those educational institutions have been working in domestic shipbuilding companies and marine equipment manufacturers. Therefore, customized education and training should be developed according to the educational demands required and then skilled personnel are needed to be supplied at proper times. This study, therefore, has found personnel demands inside and outside the country and occupational sections of offshore plants. Consequently, this study suggests making up a council comprised of shipbuilding companies, marine equipment manufacturers and educational institutions with government organization, and also researches the necessity of getting a job of personnel trained by the customized education. These results are expected to contribute to the development of education curriculum of domestic offshore plant as well as ODC(Offshore Development Center).

• Journal of the Korean Society of Marine Environment & Safety
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• v.16 no.1
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• pp.135-140
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• 2010

Vibration on the ship was generated mainly by main engine and propeller. The vibration which is generated from the ship has an effect on durability of ship's machinery and it also has an evil influence on the working conditions for crew. In this research, vibration measurement system to measure ship's vibration was built and vibration signals using acceleration sensors were measured from an accomodation space of training ship. An evaluation of vibration with regard to habitability was also discussed and the evaluation process followed the guidelines ISO6954:2000E.