• Journal of Advanced Marine Engineering and Technology
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• 제40권2호
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• pp.120-130
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• 2016

In general, a series of ship steering motions is composed of a combination of translational motions and rotational motions of the ship. In particular, a series of rotational motions frequently occurs in narrow areas such as ports and canal zones. In this paper, a method was suggested for composing an integrated control algorithm based on the jog dial as a command instrument for rotational motion control. In order to realize the rotational motions, several algorithms were suggested for generating rotational commands, for selecting motion variables, for choosing reference input values for the motion variables, for computing required accelerations and thrusts, and for allocating thrusts to actuators. A simulation program was compiled to execute simulations for three rotational motions. Finally, the effectiveness of the suggested method was verified by analyzing the simulation results.

• 수산해양교육연구
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• 제23권3호
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• pp.533-548
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• 2011

This study examined the concern levels of primary school teachers regarding transitional education from early childhood phase to primary education. Concern Based Adoption Model (CBAM) instrument of Hall and Hord (2006) was used to survey 104 primary school teachers. The results indicated that the majority of respondents' concern level was at 'informational' level (stage 1). And first peak of concern level was at 'unconcerned' level (stage 0). The first-second peak analysis of stage 0 (unconcerned) group indicated that there were 5 types of groups and each had distinguished features. Finally there were statistical differences at the unconcerned stage by in-service training and career of the first-year class. A discussion of the limitations of this study and implications for teacher education programs and operational support systems were suggested.

• 수산해양교육연구
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• 제21권4호
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• pp.489-498
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• 2009

The purpose of the study is to review research in concept, measurement, effect, and influence factor of teacher efficacy. Through the review of previous research, the study shows that the concept of teacher efficacy is likely to be situation-specific rather than teacher characteristic. And the study represents that the measurement of teacher efficacy is related to the development of measurement instrument and the extraction of construct. The effect of teacher efficacy concerns the relationship between teacher efficacy and the student's academic achievement and affective traits such as motivation, interests, and attitude, and the relationship between teacher efficacy and teacher. And the influence factor of teacher efficacy concerns the influence of job environment related to teacher. The four things mentioned above are discussed in detail based on the previous research.

• Journal of Advanced Marine Engineering and Technology
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• 제23권2호
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• pp.259-269
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• 1999

A new algorithm for measuring 3-D velocity components of high speed flows were developed using a digital image processing technique. The measuring system consists of three CCD cameras an optical instrument called AOM a digital image grabber and a host computer. The images of mov-ing particles arranged spatially on a rotation plate are taken by two or three CCD cameras and are recorderd onto the image grabber or a video tape recoder. The three-dimensionl velocity com-ponents of the particles are automatically obtained by the developed algorithm In order to verify the validity of this technique three-dimensional velocity data sets obtained from a computer simu-lation of a backward facing step flow were used as test data for the algorithm. an uncertainty analysis associated with the present algorithm is systematically evaluated, The present technique is proved to be used as a tookl for the measurement of unsteady three-dimensional fluid flows.

• 수산해양교육연구
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• 제17권3호
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• pp.373-382
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• 2005

The aim of this study is to analyze critically the meaning of 'good instruction'. In this article, the researchers emphasized the activities of teaching and learning as two essential elements of good instruction. The antecedent studies on good instruction have limitations in that they regarded good instruction as an instrument rather than valuable activity itself. This study consisted of three parts. Firstly, the researchers tried to clarify the meaning of good instruction underlying antecedent studies on instruction. Secondly, the researchers tried to analyze characteristics of good insturction suggested by antecedent studies. Thirdly, the researchers attempted to define a new meaning of good instruction. A new meaning of good instruction should be defined in accordance with characteristics of three commonplaces composing instruction such as teaching activity, learning activity and good interactions between teacher and learner. Good instruction can be defined as followings. Good instruction means an instructional activity which can change the student's meanings of experience as a result of interactions among teacher, learner, and educational materials.

• 해양환경안전학회지
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• 제27권3호
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• pp.421-428
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• 2021

Identifying which international maritime legal instruments are mandatory or recommendatory is complicated task even for maritime regulatory bodies. Although International Maritime Organization (IMO) had tried to ease the complexity by adopting guidelines on uniform wordings for making reference to other instruments in IMO parent conventions, there has still been some confusion identifying the mandatory status of IMO instruments. The aim of this study was to map out a step-based guideline to resolve the complexity of the mandatory status of IMO instruments to the maximum extent possible. This study reviewed the history of IMO rule-making process to find the root cause of the problem, then analyzed the approaches of regulatory enforcement bodies to check the practices. In conclusion, readers are directed to find such information as to legal status of IMO instruments and an improvement is proposed to enhance the transparency of information sharing for maritime industry to make better informed decisions.

• 한국정보통신학회논문지
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• 제19권9호
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• pp.2189-2196
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• 2015

환경오염 및 유류비가 증가함에 따라 선박 에너지 절감 방안에 대한 연구가 활발히 진행되고 있다. PCS(Pump Control System)는 선박냉각시스템에서 해수펌프 회전속도, 청수펌프 회전속도 및 3-Way V/V 위치 제어를 통해 에너지를 절감하는 펌프제어시스템이다. 본 논문에서는 PCS의 신뢰성 확보를 위해 실 선박의 냉각시스템과 유사한 환경을 갖춘 PCS 시뮬레이터를 개발하였다. 또한 PCS 시뮬레이터를 위한 컴퓨터 기반의 제어 시스템 및 데이터 저장시스템을 개발하였다. 제어 및 데이터 저장시스템 개발에는 National Instrument 사의 cDAQ 및 LabVIEW를 사용하였다. 최종적으로 저장된 데이터를 분석하여 시뮬레이터의 동작을 확인하였다.

• 수산해양교육연구
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• 제28권4호
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• pp.994-1005
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• 2016

Expansion and spreading of marine telemedicine is rather restricted due to the conflict of laws relating to medical service and lack of provisions in the Seafarers' Act, Medical Service Act, etc. Thus, this study is intended to reveal the current status and problems of marine emergency medical advice system for the furtherance of health care of seafarers and emergency medical assistance conditions and deduce relevant proposals for legislative improvements thereof in order to resolve underlying problems and issues. The results of this study can be summated as follows. First, in respect of directions to provide marine emergency service based on marine telemedicine system, emergency radio medical advice system needs to be strengthened to meet domestic and international instrument, marine telemedicine system needs to be provided through integrating u-Health technology and special marine medical center needs to be established. Second, regarding directions to provide health promotion service based on the marine telemedicine system, a new process of health care service for seafarers needs to be devised and provided involving seafarers' life cycle covering from prior to boarding to after leaving a ship. The conclusions of this study can be given as follows. First, the following new provisions need to be introduced in the Seafarers' Act. (1) The Minister of Oceans and Fisheries and a shipowner shall conduct matters pertaining to preventive health promotion and care for seafarers; (2) a provisions regarding establishment of seafarers' health promotion center by the Minister; (3) a special exemption permitting marine telemedicine service and qualification requirements for marine telemedicine assistant; (4) shipowner's obligation of carrying seafarers' health measuring equipment on board. Second, the relevant provisions regarding medical care persons needs to be revised in such a way that master or chief officer shall be appointed to be in charge of medical care on board. Last but not least, it is also essential to amend and update the minimum standards on drug and medicines to be carried on board and medicine chest and equipment on board.

• 한국항해항만학회지
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• 제37권5호
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• pp.511-517
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• 2013

UNFCCC was adopted in 1992 in order to prevent global warming. However, as a lack of concrete reduction goal and implementation plan, UNFCCC could not have effectiveness. In 1997, Kyoto Protocol to UNFCCC was adopted and UNFCCC regime started practically binding on the parties. Global warming takes the leading role in changing marine environment such as the rising of water level and sea water temperature. Also, Ocean plays the vital role in storing carbon to prevent global warming. Meanwhile ships which get the propulsion generated by consuming the fossil fuel are identified as GHG source and the discussions regarding the control of GHG emitted from ships are still in progress in IMO. IMO instrument has some legal conflicts with UNFCCC in principle. Therefore, this paper reviews the present UNFCCC regime and UNCLOS. Also, it surveys activities of IMO and analyze the Amendment to MARPOL73/78 Annex VI which entered into force on January 1, 2013. Finally, conclusions suggest the improvements in order to ensure effectiveness the new Amendment to MARPOL73/78 practically.

• 한국해양환경ㆍ에너지학회지
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• 제6권1호
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• pp.30-43
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• 2003

반폐쇄성인 북서태평양 해역은 지형, 해류순환, 생태학적 관점에서 하나의 큰 시스템으로 간주되어 관리되어야 한다 현재 북서태평양권에서 진행되고 있는 해양환경 관련 다자간 협력 활동은 WESTPAC, PEMSEA, PICES, NOWPAP 등 다양하다. 본 논문에서는 특히 유엔환경계획의 주관하에 한ㆍ중ㆍ일ㆍ러가 지난 1994년부터 채택하여 수행중인 북서태평양보전실천계획(NOWPAP)사업을 중심으로 하여 북서태평양에서 진행되고 있는 지역협력 활동의 제반현황과 문제점을 살펴보고 이의 가능한 해결책을 제시하고자 하였다. 주요 제안으로는 (1) 북서태평양 인접국들은 해양환경 관련 국제협력 활동에 있어서 법적 구속력 있는 지역 차원의 협약의 중요성을 인식하고 실질적인 지역 협력활동을 수행함에 있어 큰 우산으로 작용할 수 있는 해양환경 관련 협약을 개발하여야 하며, 이에 (2) 현재의 제반 상황을 고려하여 현 단계에서는 국가의 영해나 관할권 등의 이슈를 침해하지 않는 느슨한 형태의 협약 개발을 시도할 필요가 있다. 아울러 (3) 지역내 다양한 정치 사회적 문제로 인해 환경분야의 협력사업이 종종 중단되거나 간섭받지 않도록 하기 위하여 유엔환경계획이나 다른 국제기구로부터의 지도력이 계속 발휘되어야 한다 (4) 재정적 및 제도적 기반을 계속 강화시켜야 하며, (5) 또한 북서태평양에서 연안 및 해양환경에의 위해 요소에 대응하기 위한 지역내 다자간 협력활동을 지속적으로 수행하여야 한다