• Title, Summary, Keyword: 승선원

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Development of Safe Navigation Contents for Aging Seafarer in Tug-barge Transportation (고령 예부선 운항자를 위한 안전운항 교육 콘텐츠의 개발)

  • Kim, Hong-Tae;Chang, Hea-Jung;Kim, Hye-Jin
    • Journal of Navigation and Port Research
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    • v.35 no.5
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    • pp.351-358
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    • 2011
  • Recently, tugs and barges have become larger in size and increased in number. Also, most of tugs and barges are more than ten-years old. Total number of marine accident has been decreased, whereas that of accidental happening in tug-barge transportation has not been decreased. The statistics of marine accidents in 2010 shows that tug-barge accidents increased rapidly compared with those of 2009. The cause of accidental happening in tug-barge transportation is a quality of tug-barge operator the labour serious shortage of crew. This study is to give or suggest the various educational contents considering old age of crew and navigational environment for safe navigation in tug-barge transportation.

New BLU Sheet with Linear Arrays of Deformed Bar Prism for Direct Back Light Unit (직하형 Back Light Unit에 사용하는 변형 막대프리즘의 1차원 배열로 구성한 새로운 BLU 필름)

  • Jang, Sun-Young;Jo, Jae-Heung;Baek, Seung-Sun
    • Korean Journal of Optics and Photonics
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    • v.18 no.6
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    • pp.401-409
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    • 2007
  • A new sheet of back light unit(BLU) to reduce the number of sheets and enhance the optical performances of direct back light unit(BLU) in a liquid crystal display is proposed and designed. In order to improve the straightness and spatial uniformity of brightness of the BLU, we design the new sheet with linear arrays of complicated bar prism by using the fusion of cylindrical lens and bar prism. Then, we investigate and analyze various optical performances of a BLU including the new sheet through an illumination optical system design program. From these results, we determine the optimum geometrical structure of the sheet. Under the optimum condition, the luminance efficiency and spatial uniformity of luminance of the BLU are 53.5% and 83.5% respectively. And the vertical and horizontal widths of the angular luminance distribution are $90^{\circ}$ and $112.5^{\circ}$ respectively. Finally we have fabricated a new BLU sheet according to this design shape by using an ordinary resins.

Analysis Report of the Elapse for Costa Concordia's Disaster (코스타 콘코디아 재난 경과 분석 보고서)

  • Yoon, Dae-Gwun;Kim, Cheol-Seung
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.18 no.4
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    • pp.331-335
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    • 2012
  • On January 13th 2012 Italian flag Costa Concordia was partly sunk. The ship was carrying 4,252 passengers and crew; in the next few days the bodies of 30 people were found. Two are still missing. Two South Korean passengers and an Italian crew member was rescued from the ship on January 15th, more than 24 hours after the accident. As of June 18th 2012 (The date of presentation) around 32 people had not been accounted for. In this paper, it is viewed and pointed out the cause, problem, and implication for the future. As a result, intelligent innovative evacuation system for the VLPS (Very Large Passenger Ship) should be set up in terms of international maritime safety.

Tolerance analysis of Multi-Configurative Microscopic System for Inspecting the Wire-Bonding Status of Semiconductor Chips (반도체 와이어 본딩 검사용 다중배치 현미경 광학계에 대한 공차분석)

  • Ryu, Jae-Myung;Kim, Jae-Bum;Kang, Geon-Mo;Jung, Jin-Ho;Baek, Seung-Sun;Jo, Jae-Heung
    • Korean Journal of Optics and Photonics
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    • v.17 no.2
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    • pp.149-158
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    • 2006
  • We have analyzed various tolerances of the multi-configurative microscopic system for inspecting the wire-bonding of a reed frame by using the Gaussian bracket method and the equivalent lens method. The tolerances for the curvature and the thickness, which are axial symmetric tolerances, are given by varying the back focal length within a fecal depth under diffraction-limited conditions. Moreover, by using the trial and error method, the axial non-symmetric tolerances for decenter and tilt are established by assigning the 5% variation of MTF(modulation transfer function) at the spatial frequency of 50 lp/mm and at the field angle of 0.7 field. As the tolerances with the most probable distribution are distributed within the range of the decay rate of less than 5% independent of the probability distribution of tolerances, we can achieve completely the desired design performances of the multi-configurative microscopic system by using the various ranges of these tolerances.

Risk factors of fisher on stow net fishing vessel using analysis of adjudication (재결서 분석을 통한 안강망어선에 승선하는 선원의 위험요인)

  • KIM, Wook-Sung;HYUN, Yun-Ki;LEE, Yoo-Won
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.56 no.2
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    • pp.155-162
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    • 2020
  • The adjudication of Korean Maritime Safety Tribunal (KMST) was analyzed to collect basic data to identify the cause of the risk that did not appear in the current data provided by the fishermen's occupational accidents of the National Federation of Fisheries Cooperative (NFFC) in stow net fishing vessel from 2015 to 2019. The personnel's carelessness was the most common in 29 out of 33 accidents (87.9%), followed by 25 cases (75.8%) of inadequacy of instructions, 24 cases (72.7%) of inadequacy of education on hazard factor, 20 cases (60.6%) of no personal protection equipment, 18 cases (54.5%) of poor guard, 17 cases (51.5%) of inadequacy of work method, 16 cases (48.5%) of absence of emergency stop button, 14 cases (42.4%) of work practice of poor safety precautions that affected more than 40% of all accidents as accident causes. These causes had a strong influence on each other, and the ratio of accident causes is high. With this relationship, accidents can be prevented or the severity of human injury can be reduced if types of accident process can be estimated with a scenario, and the key points before the accident in the scenario are switched to safe points.

Risk awareness survey of fisher on stow net fishing vessel using a questionnaire (설문을 통한 안강망어선에 승선하는 선원의 위험인식 조사)

  • HYUN, Yun-Ki;KIM, Hyung-seok;LEE, Yoo-Won
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.56 no.2
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    • pp.147-154
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    • 2020
  • The questionnaire survey was carried out to collect basic data to identify the cause of the risk that did not appear in the current data provided by the fishermen's occupational accidents of the National Federation of Fisheries Cooperative (NFFC) to the onsite specialist, such as a fishing master, chief engineer and fisher in stow net fishing vessel from June to July 2018. The results are as follows. A total of 134 cases were surveyed, including 53 cases in Yeosu, 44 cases in Mokpo, 30 cases in Boryeong and 7 cases in Gunsan. Approximately 60% of the respondents on board the stow net fishing vessel were more than 20 years old, and the boarding experience was seasoned and suitable for the respondents. In the 4M analysis by safety accident factor during fishing work, the mechanical factors included 51 cases (25.0%) of decrepit equipment or poor maintenance and 49 cases (24.0%) of systemic error of fishing equipment. The environmental factors exhibited 71 cases (33.5%) of poor communication by mixed manning of foreign fishermen and 63 cases (29.7%) of poor environment such as heavy weather etc. The human factors showed 78 cases (37.3%) of personnel's carelessness and 45 cases (21.5%) of unskillfulness of operating net and haulers. The management factors exhibited 59 cases (32.1%) of work practice of poor safety precautions and 56 cases (30.4%) of inadequacy of education on hazard factor. The results are expected to contribute to the creation of a safe operating environment for stow net fishery, such as a fisher boarding a stow net fishing vessel, enabling the analysis of major causes of working safety accidents by cause.

Biochemical Analysis of Crew's Blood and Urine before & after Long-Term Navigation (원양항해 전과 후 선원의 혈액 및 소변의 생화학적 분석)

  • Ha Hae-Dong;Moon Serng-Bae;Jun Seung-Hwan;Jeong Eun-Seok;Kim Jae-Ho
    • Journal of Navigation and Port Research
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    • v.30 no.5
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    • pp.415-420
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    • 2006
  • Urinalyses have been conducted for 28 crew's in H University's training ship and creatine and uric acid turned out to be higher in all ages, which can be inferred that board job has caused negative impact on kidney and/or malfunction In addition, TC and HDL-C, LDL-C ha; decreased, however, TG has increased after the navigation. All different positions including officer, 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 turned 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 long-tenn navigation has definite impact on the liver cell function.

Development of Efficient Training Material through Danger Analysis to Various Encounter Types using Training Ship (실습선을 이용한 선박 조우형태별 위험도 분석을 통한 효율적인 실습 교육자료 개발)

  • Park, Young-Soo;Lee, Yun-Sok
    • Journal of Navigation and Port Research
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    • v.32 no.1
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    • pp.103-108
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    • 2008
  • In the maritime universities, cadets of deck part should practice on board training using training ships of university or merchant vessels of company for 1 year according to STCW Convention. For training period, trainees are educated many education items as to positioning ability, chart work ability, vessel operation ability and cargo operation ability etc. Among many abilities, vessel avoiding ability which is demanded as a basic ability for deck officer can't be gained easily, because avoiding maneuver of ship controlled by cadets is not allowable regally and encounter situations occur randomly. This paper investigated CPA to the various encounter types with other vessels during the ocean going navigation of T.S Hannara. We analysis danger degree per each encounter type, and proposed a basic material of efficient training education about proper look-out and avoiding maneuver.

Development of Collision Scenario-Based Evaluation System for the Cognitive Performance of Marine Officers (충돌시나리오 기반의 항해사 인지능력 평가시스템 개발)

  • Kim, Hong-Tae;Barentt, Mike;Yang, Won-Jae
    • Journal of Navigation and Port Research
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    • v.31 no.8
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    • pp.629-635
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    • 2007
  • Reduced crew performance is frequently cited as a major causal factor in maritime accident causation. Although considerable research has been conducted on the hours of work undertaken by seafarers through interviews and the analysis of records, experimental studies to observe the effects of factors such as high workload, shift patterns, stress, sleep deprivation and disturbance on the cognitive performance of mariners have been limited. Other safety-critical transport industries, such as aviation and rail, have developed fatigue management tools to help manage the work patterns of their operators. Such a tool for mariners would assist shipboard crew, marine pilots and shore management in planning and improving work schedules. The overall aim of this paper is to determine a fatigue factor, which can be applied to human performance data, as part of a software program that calculates total cognitive performance. This program enables us to establish the levels of cognitive performance of a group of marine pilots to test a decision-making task based on radar information. This paper addresses one of the factors that may contribute to the determination of various fatigue factors: the effect of different work patterns on the cognitive performance of a marine pilot.

Implementation Techniques for the Seafarer's Human Error Assessment Model in a Merchant Ship: Practical Application to a Ship Management Company (상선 선원의 인적과실 평가 모델 구축기법: 선박관리회사 적용 실례)

  • Yim, Jeong-Bin
    • Journal of Navigation and Port Research
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    • v.33 no.3
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    • pp.181-191
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    • 2009
  • In general, seafarer's human error is considered to be the preponderant muse for the majority of maritime transportation accidents in a merchant ship. The implementation techniques for Human Error Model (HEM) to assess possible accident risk by deck officers including captain, chief officer, second mate and third mate are described in this study. The scope of this work is focused to 642 deck officers in the ship management company with 130 vessels. At first, HEM can be constructed through the statistical analysis and expert's brainstorming process with human data to 642 deck officers. Then the variables $\upsilon$ for the human factors, the evaluation level EP($\upsilon$) for $\upsilon$, the weight $\alpha$ of $\upsilon$, and the title weight $\beta$ of each deck officers can be decided. In addition, through the analysis of ship's accident history, the accident causation ratios by human error ${\gamma}_H$ and by external error ${\gamma}_B$ can be found as 0.517(51.7%) and 0.483(48.3%), respectively. The correlation coefficients to $\upsilon$ are also shown significant for a 95% confidence interval (p < 0.05) for each coefficient. And the validity of HEM is also surveyed by the analysis of normal probability distribution of risk level RL to each deck officer.