• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.535-538
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• 2009

Auto Pilot은 전자해도나 플로터를 이용하여 항행하고자 하는 코스를 입력 시킨 후 운행모드를 자동운항에 위치시키면 자동으로 경로를 따라 선박을 이동시키는 시스템이다. Water Jet 추진장치는 엔진과 연결된 펌프를 가동해 배 밑바닥에 있는 흡입구로부터 물을 빨아들인 후에 배 내부에 설치된 유도관을 거쳐 노즐을 통해 가속된 물을 배 뒤쪽으로 분사하면서 배를 앞으로 밀어주는 힘을 발생시키는 추진 장치다. Water Jet 추진장치는 수심의 영향이 적고, 고속영역 일수록 추진 효율이 높고 진동과 유동소음 측면에서도 매우 유리한 장점을 갖고 있어 새로운 추진시스템으로 국내외 적으로 수요가 확대되고 있다. 하지만 Auto Pilot 와 Water Jet 추진시스템의 신호 체계가 달라 상호간 효과적으로 신호를 전달할 수 있는 장치가 필요하다. 본 논문은 기존의 Auto Pilot 와 Water Jet 추진시스템의 신뢰성 있는 통신을 할 수 있도록 상호 연동하는 Interface 장치를 설계하였다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2002년도 춘계공동학술발표회요약집
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• pp.445.2-445
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• 2002

• 수산해양기술연구
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• 제54권3호
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• pp.231-238
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• 2018

In this study, a ship motion control system design method is introduced for autonomous ships. Some related research results and technologies for autonomous ships have already been developed and applied to ships. For example, the Norwegian Maritime Authority and the Coastal Administration have signed an agreement that allows to test of autonomous ships in the defined area (port to port). Many countries and industries are pursuing to realize the autonomous vessel in the real world. In this paper, the authors try to develop related technology. As basic research, a ship model of the pilot vessel is developed and physical parameters are identified by experiment and simulations. Using the mathematical ship model, a control system is designed and control performance is evaluated by simulations.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.1108-1111
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• 2009

디지털 오토파일럿은 전자해도상에서 선박의 운항예정 코스를 설정하여 입력시킨 후, 자동운항 모드로 세트하면 선박이 운항코스의 경로를 따라 자동으로 항행하는 시스템이다. 워터젯시스템은 엔진과 연결된 임펠러(회전익)를 구동하여 선저에 선수방향으로 설치된 흡입구를 통하여 해수를 흡입하여 압력을 높인 후, 노즐을 통하여 가속된 해수를 선저의 선미방향으로 분사시키므로써 선체를 조향하고 추진시키는 장치이다. 그러므로 워터젯시스템은 수심이 낮은 해역에서도 운항이 가능하며, 고효율의 고속추진, 상대적으로 낮은 진동과 유동소음 등의 환경에서 매우 효과적이므로 새로운 추진시스템으로 수요가 확대되고 있다. 그러나 워터젯시스템의 전기적인 제어신호는 표준화되어있지 않으므로 디지털 오토파일럿의 표준화된 인터페이스를 제공하지 않는다. 본 논문은 표준화된 오토파일럿과 워터젯시스템 사이에서 연동하므로써 고속선박을 신뢰성 있게 조향할 수 있는 피드백 제어인터페이스 모듈을 설계하였다.

• 수산해양교육연구
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• 제29권1호
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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.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2006년도 전기학술대회논문집
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• pp.219-220
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• 2006

In Korea, Yellow sea which is located west side of korea has a between 2.8 to 8.0 m tidal range. So, Vessel Traffic Support System(VTSS) is designed to provide predicted water level, tidal elevation and tide induced current. VTSS has a 58 tidal constituents from 1 year tide observed data and 23 tidal current constituents from 1 month current data at Dang-Jin P.P harbor. Predicted data visualized with graphs, vectors and stick plot. The purpose of VTSS give to information to maritime pilot for help to make decision schedule.

• 수산해양교육연구
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• 제27권6호
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• pp.1734-1744
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• 2015

Majority of marine accidents that occur on fishing vessels are engine accidents. This comprises more than 26 % of the total annual fishing vessel marine accident cases. Large numbers of engine accidents happen in the cooling water system, which are mostly caused by negligence on regular check-up and repair. Notably, small-sized ships have higher engine accidents occurrence rate compared to medium-and large-sized ships. Based on the Report of the Korea Ship Safety Technology Authority, engine accident cases reached 3,032 out of the total 3,081 cases. This study researches on the differences between the small-sized ship pilot, an operator of a vessel engine of less than 200 tons, and a 6th level marine engineer, in terms of the relationship between management forms and what causes the marine accidents in association with the cooling water system. It also studies and analyzes the differences in frequency of the accident occurrence between the two groups. ${\chi}^2$ qualification was imposed through the SPSS statistical analysis program and it got qualified at the significance level of 5%. The research shall be utilized as one of the base line data for the reduction of marine accidents.

• 수산해양기술연구
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• 제52권1호
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• pp.24-35
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• 2016

An acoustic and trawl pilot survey using a small vessel was conducted in Jinhae bay of the South Sea of South Korea on April 13~14, May 11~13 and June 8~10, 2015. During the survey, acoustic data was collected and bottom trawls were conducted at the same time. First, various noises were eliminated by using the Park method based on the Wang method (Wang et al., 2015; Park et al., 2015), the species compositions and catch rate from each bottom trawl were observed, and spatial distribution of fishery resources in the water column and their nautical area scattering coefficient (NASC) were investigated through acoustic data. During the entire survey period, 12 orders, 33 families and 41 species were caught. The most caught species in April, May and June were Okamejei kenojei, Zoarces gilli and Pholis nebulosa, respectively. Fish schools were observed near the line of net mouth height in April. Numerous weak scatters were presented on the echograms in May and June. Many fish schools appeared in between the water surface and 20 m deep in May. The NASC value from entire water columns was the lowest in April ($35.9m^2/n{\cdot}mile^2$) and highest in June ($1541.3m^2/n{\cdot}mile^2$).

• The Plant Pathology Journal
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• 제33권3호
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• pp.337-344
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• 2017

To develop a commercial product using the mycoparasitic fungus Simplicillium lamellicola BCP, the scale-up of conidia production from a 5-l jar to a 5,000-l pilot bioreactor, optimization of the freeze-drying of the fermentation broth, and preparation of a wettable powder-type formulation were performed. Then, its disease control efficacy was evaluated against gray mold diseases of tomato and ginseng plants in field conditions. The final conidial yields of S. lamellicola BCP were $3.3{\times}10^9conidia/ml$ for a 5-l jar, $3.5{\times}10^9conidia/ml$ for a 500-l pilot vessel, and $3.1{\times}10^9conidia/ml$ for a 5,000-l pilot bioreactor. The conidial yield in the 5,000-l pilot bioreactor was comparable to that in the 5-l jar and 500-l pilot vessel. On the other hand, the highest conidial viability of 86% was obtained by the freeze-drying method using an additive combination of lactose, trehalose, soybean meal, and glycerin. Using the freeze-dried sample, a wettable powder-type formulation (active ingredient 10%; BCP-WP10) was prepared. A conidial viability of more than 50% was maintained in BCP-WP10 until 22 weeks for storage at $40^{\circ}C$. BCP-WP10 effectively suppressed the development of gray mold disease on tomato with control efficacies of 64.7% and 82.6% at 500- and 250-fold dilutions, respectively. It also reduced the incidence of gray mold on ginseng by 65.6% and 81.3% at 500- and 250-fold dilutions, respectively. The results indicated that the new microbial fungicide BCP-WP10 can be used widely to control gray mold diseases of various crops including tomato and ginseng.

• Nuclear Engineering and Technology
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• 제41권8호
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• pp.995-1004
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• 2009

The Advanced Power Reactor 1400 (APR1400) is an evolutionary advanced light water reactor (ALWR) based on the Optimized Power Reactor 1000 (OPR1000), which is in operation in Korea. The APR1400 incorporates a variety of engineering improvements and operational experience to enhance safety, economics, and reliability. The advanced design features and improvements of the APR1400 design include a pilot operated safety relief valve (POSRV), a four-train safety injection system with direct vessel injection (DVI), a fluidic device (FD) in the safety injection tank, an in-containment refueling water storage tank (IRWST), an external reactor vessel cooling system, and an integrated head assembly (IHA). Development of the APR1400 started in 1992 and continued for ten years. The APR1400 design received design certification from the Korean nuclear regulatory body in May of2002. Currently, two construction projects for the APR1400 are in progress in Korea.