• Journal of Navigation and Port Research
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• v.31 no.1 s.117
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• pp.1-6
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• 2007

The evaluation of safety of simulated maneuvers is frequently analysed by so called goal-line or point of interest in Korea. For the purpose of warning the risk in the proximity measure composed of only the goal-line analysis, this paper utilized Korea Institute of Maritime and Fisheries Technology(KIMFT) which houses a real-time, full-mission shiphandling simulator to examine the goal-line and in-length analyses in the outbound channel of Kwangyang port as an example. It used a 15,000 TEU container ship as a model under environmental conditions of the northwestly 26-knot wind and 2.2-knot ebb current. The result of two analyses showed the probability invading the channel boundary obtained by the goal-line analysis is a little greater than that of the in-length analysis. Therefore it was acknowledged that the proximity measure by the goal-line analysis alone may be followed by some risk. In addition, this paper was to suggest the closest distance to channel boundary from the ship's edge as one of proximity measures, instead of using the ship's deviation from the centerline of channel.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.101-103
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• 2023

기존의 제설작업은 인력에 의존하여 시간과 비용이 많이 소요되고, 작업 중 발생할 수 있는 안전사고의 위험성이 존재한다. 본 논문은 제설작업의 효율성과 안전성 그리고 신속성을 높이기 위해 임베디드시스템을 활용한 드론용 제설장치의 설계에 대해 다루고 있다. 임베디드시스템은 RF모듈을 구성하고 무선으로 제어조종이 가능하도록 고안하였다. 드론에 장착되는 제설장치의 임베디드시스템으로는 아두이노메가2560을 채택하였다. 아두이노메가2560은 제설장치의 제어에 필요한 실시간 데이터수집, 처리, 응답을 처리와 RF모듈에서 오는 데이터에 대한 연산 및 제어 수행을 할 수 있다. 제설장치를 장착한 드론은 기존의 제설작업보다 안전하고 신속하게 수행될 것으로 기대된다.

• Journal of Korean Traditional Oncology
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• v.10 no.1
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• pp.1-45
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• 2005

많은 암 환자들이 보완대체의학(CAM)의 치료법을 이용한다. 의사들은 보완대체의학 치료법에 대한 권위 있는 정보들을 이를 찾는 환자들에게 책임 있는 조언을 줄 수 있기 위해 필요로 한다. 이 글은 암 환자에게 일반적으로 사용되는 선택된 보완대체의학 치료법의 효과와 안정성에 대한 최근의 증거를 요약했다. 식이요법과 보조식품, 한약 및 기타 생약제재, 침, 마사지, 운동, 심리 및 심신의학 등의 주요 카테고리가 포함되었다. 효과의 증거에 대한 '가능한 질병진행과 생존율에 대한 효과' 및 '가능한 완화효과'의 두 가지 범주가 고려되었다. 안전성의 증거를 평가하는데 있어 '직적접인 부작용의 위험'과 '통상적 치료법과의 상호작용에 의한 위험'의 두 가지 위험 요소가 고려되었다. 각각의 치료에 있어 효용성과 안정성에 대한 현재의 균형은 이 치료법이 적절히 권고가 되고 수용되어지거나(예를 들어 유방암과 전립선암을 가진 영양 섭취가 충분한 환자의 식이지방 감소) 억제되는 것을(예를 들어 과량의 비타민 A 보조제) 제시한다. 이러한 전략은 보완대체의학의 치료법을 찾는 암환자들에게 책임 있고 근거중심적이고 환자중심적인 조언을 제공하는 것을 발전시킬 수 있다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.1
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• pp.36-42
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• 2018

This paper considers the Marine Traffic Risk Assessment for fixed and moving targets, which threaten officers during a voyage. The Collision Risk Assessment Formula was calculated based on a dynamic ship domain considering the length, speed and maneuvering capability of a vessel. In particular, the Navigation Risk Assessment Model that is used to quantitatively index the effect of a ship's size, speed, etc. has been reviewed and improved using a hybrid combination of a vessel's dynamic area and the Collision Risk Assessment Formula. Accordingly, a new type of Marine Traffic Risk Assessment Model has been suggested giving consideration to the Speed Length Ratio, which was not sufficiently reflected in the existing Risk Assessment Model. The larger the Speed Length Ratio (dimensionless speed), the higher the CJ value. That is, the CJ value is presented well by the Speed Length Ratio. When the Speed Length Ratio is large, states ranging from [Caution], [Warning], [Dangerous] or [Very Dangerous] are presented from a greater distance than when the Speed Length Ratio is small. The results of this study, can be used for route and port development, including dangerous route avoidance, optimum route planning, breakwater width, bridge span, etc. as well as the development of costal navigation safety charts. This research is also applicable for the selection of optimum ship routing and the prevention of collisions for smart ships such as autonomous vessels.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.270-278
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• 2009

Most of previous studies on civil servants' stress factors and job satisfaction have been focused on low job satisfaction caused by stress from role relations and human relations. In case of fire officers, however, their stress is expected to be influenced by their unique job characteristics such as risk, urgency, stand-by, and shift. Thus, this study divided fire officers'stress factors into job-related factors (risk, urgency, stand-by, alternation) and role-related factors (role conflict, role ambiguity, role overload), and empirically analyzed how these factors affect their job satisfaction. According to the results of this study, fire officers' job characteristics and their roles in the organization had a significant effect on their job satisfaction. Particularly, among the job-related factors, urgency and stand-by had a positive effect on job satisfaction, and among role-related factors, role conflict and role overload had a negative effect on job satisfaction. In addition, fire officers' stress and job satisfaction were significantly different according to their job (fire fighting, rescue and first aid, fire administration, others), and according to their workplace (fire fighting headquarters, fire station, 119 safety center).

• Journal of Fisheries and Marine Sciences Education
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• v.15 no.1
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• pp.47-56
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• 2003

Recently with the conclusion of fisheries agreements between Korea and Japan, and between Korea and China, trawlers in korea must operate in smaller fishing ground than before. As a result of this, the possibilities of collisionin increases gradually between trawlers under operation in this area. Authors performed a series of experiments on board to give the information of collision avoiding action to navigators of trawlers. The obtained results are summerized as follows : 1. The greater the rudder angle, the smaller the value of T, but there is no big diffierence in K due to rudder angle. 2. The greatest distance is to be kept by the give way vessel to avoid collision when the crossing course angle is $70^{\circ}{\sim}90^{\circ}$. In this case the safety minimum approaching distance must be more than 5 times of her own length. 3. Risk of collision in crossing is more greater in obtuse situation than in acute one. 4. The navigator of the give way vessel must take an action to avoid collisions outside of the minimum safety approaching distance.

• Journal of the Korea Institute of Military Science and Technology
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• v.16 no.2
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• pp.138-145
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• 2013

Airworthiness certification is a government certification for the military aircraft to safely attain, sustain and terminate flight and It is a mandatory process of qualifying the flight safety within the operational boundaries of a military aircraft. To save the manhour, time and cost for applying all the airworthiness certification criteria to the aircraft equipped with flight control switching mechanism development program, an identification of the risk and systematic assessment of risk is analysed. Airworthiness redesign actions so called software switching mechanism for the modified aircraft in the flight technology and electric system area are suggested to reduce the risk hazard index.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.38-40
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• 2012

해상 교통량 증가로 급증하는 선박 사고 위험을 줄이기 위해 안전 운항 관리를 위한 연구가 필수적이다. 최근 SOLAS에서 300톤 이상 급에 대해서는 AIS의 의무 장착이 제정되면서 선박 운항의 안전에 크게 기여하고 있다. 본 연구에서는 AIS의 정적, 동적 데이터를 수집하여 항계내 통항 선박의 궤적의 곡률을 분석하여 불규칙 이동 조종선박의 움직임을 파악하였다. 기존의 과거 누적 데이터의 퍼지이론을 활용한 이상 거동의 선박식별 시스템은 전문가 시스템에 의존하여 항적의 비정상성을 판단하므로 항로의 특성에 따른 실 항해상황을 간과할 수 있는 문제점이 있다. 본 연구는 선박 움직임에 대한 궤적의 시간 AIS 정보를 활용하여 항로이탈의 변화율에 해당하는 곡률분석, 항로선으로부터 좌우의 변동을 보다 정확하게 모니터링 할 수 있는 이상 거동 선박을 식별하는 방법을 제안한다. 본 연구는 VTS 및 VMS의 응용서비스로서 해양사고의 사전예방을 위한 연안 및 항만수로의 효율적인 관리에 기여할 것이다.

• The Korean Journal of Air & Space Law and Policy
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• v.26 no.2
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• pp.149-179
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• 2011

Statistics of aviation accident in Korea show that safety level of training flights is high. However, more than 80% of aviation accidents happen owing to human factors. And because most reasons of them are concerned with pilot error, it is very important for student pilots who will transport a lot of passengers to develop the knowledge of safety and abilities of risk management for preventing accidents. In this study, in order to investigate the Human Factors which affect safety in training student pilots for flight, verified the correlationbetween experiences of accident, the differences according to the experience level of training flight and the differences between college student pilots and ordinary student pilots on the basis of human factors that composes the SHELL models. For the study, Using SPSS 17.0, conducted Correlation Analysis, Analysis of Variance(ANOVA) and t-test. To sum up the result of this study, student pilot's ability and equipment in the cockpit are the important factors for safety when pilots are training flight. Also the analysis of the differences between human factors according to the characters of student pilots' groups shows that college student pilots are affected by immanent factors and organizational cultures. So far, there haven't been any accidents which is related with human casualties when training at the ATO(Approved Training Organization). But accidents can occur at any time and anywhere. Especially the human factors which comprises most of aviation accident have a wide reach and are impossible to be eliminated, therefore, it is best to minimize them. Because ATO is the starting point to lead the aviation industry of Korea, we will have to be aware of problems and improve education/training of human factors.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.6
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• pp.775-782
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• 2021

The Myodo-Strait at Yeosu Port is normally used as a major vessel passage for dangerous cargo carriers that carry regular products of dangerous goods. Currently, the Myodo-Strait allows only single passage, and the speed of passage is also limited to 8 knots. As a result, demurrage at the wharf of hazardous goods are also on the rise. It is expected that the development of a number of dangerous commodity wharf in the future will increase the volume of vessel traffic and increase the number of vessels used in the project area. Therefore, it is urgent to improve the waterway in order to secure the safety of ships using the waterway and improve the demurrage. This study proposed an improvement plan for the waterway through the analysis of the marine environment of the waterway and the process of collecting opinions from users in the sea area. and it was finally proposed to expend the width of the strait to 300m and secure a depth of 9.50m through Guidelines of Port and Harbor Design review and ship handling simulation evaluation. In addition it was evaluated that the vessel traffic congestions at peak-time in the situation of solo passage was greatly improved from 71.01% to 47.3% even when it was allowed to ship's crossing passage, as a result of vessel traffic congestions evaluation. According to the proposed improvement plan, the safety of ships' passage in the project area can be secured, and the issue of demurrage was also considered to be improved.