• Korean Journal of Digital Imaging in Medicine
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• v.11 no.2
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• pp.69-77
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• 2009

This study gives an account of the collateral standards in IEC 60601-1-3: 2008 specifying the general requirements for basic safety and essential performance of diagnostic X-ray equipment regarding radiation protection as it pertains to the production of X-rays. The collateral standards establish general requirements for safety regarding ionization radiation in diagnostic radiation systems and describe a verifiable evaluation method of suitable requirements regarding control over the lowest possible dose equivalent for patients, radiologic technologists, and others. The particular standards for each equipment can be determined by the general requirements in the collateral standard and the particular standard is followed in the risk management file. The guidelines for radiation safety of diagnostic radiation systems is written up in ISO 13485, ISO 14971, IEC 60601-1-3(2002)1st edition, medical electric equipment part 1-3, and the general requirements for safety-collateral standards: programmable electrical medical systems. Therefore the diagnostic radiation system protects citizens' health rights with the establishment and revisions of laws and standards for diagnostic radiation systems as a background for the general requirements of radiation safe guards applies, as an international trend, standards regarding the medical radiation safety management. The diagnostic radiation system will also assure competitive power through a conforming evaluation unifying the differing standards, technical specifications, and recognized processes.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.05a
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• pp.374-378
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• 2008

The analysis about cases which does not correspond in electric equipment technical standard and judgement standard while doing pre inspection, it improves the technical specifications and the draft of construction plan. The analysis of the reform cases prevents the electric disaster and propagates the electrical safety. Hereafter the reform cases will improve the electric technical ability and help the electrical safety of the yard.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.964-968
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• 2005

The standardization of information communication is doing a Internal each other connection and each other characteristic stability operation security in objective. From the low-speed network of the subway operation beginning currently it changes with the superhigh speed digital information transmission communication service environment which is a quality service, the hazard which plans the quality improvement of the efficient communication service use which hits to here and passenger service the standardization of the technical standard which stands and the improvement which hits to an engineering standard and facility must come to accomplish. The facility which existing is been old or the enclosure communication equipments which are insufficient. it improves, establishment itexpands efficiently, like this facilities it is stabilized and it is economic and rationally use maintenance it manages with the plan for the inside and outside of the country information communication relation technical standard and engineering standard service feature improvement and future expandability and economical efficiency, the possibility of having a pliability in order to be, rational technical standard and standard it takes a triangular position, efficient characteristic security of information communication service there is a place objective which promises the rational development of course city railroad communication system with character. Function improvement of enclosure communication base equipment, against an improvement and standardization plan it described trom the prosecution which it sees.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.10a
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• pp.3-10
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• 2006

Recently it is coming to be hish reality on visual system in ship-handling simulator depending on the technical development of 3D computer graphics. Even with high reality, it is possible that visual information presented seafarers through screen or display is not equivalent to the real world. In docking maneuvering, visual targets or obstructs are sighted close to ship's operator or within few hundred meters, so it might be possible to affect visual information such as the difference between both eyes' and single eye's visual sight. Because it is not possible to perceive of very slow ship's movement by visual in case of very large vessels, so the Doppler Docking SONAR and/or Docking Speed and Distance Measurement Equipment were developed and applied for safety docking maneuvering. By the way, the simulator training includes the ship's maneuvering training in docking, but in Ship-handling Simulator and also onboard, there are some limitations of perception of ship's movement with visual information. In this paper, perception of ship's movement with visual system in Ship-handling Simulator and competition of performances of visual systems that are conventional screen type with Fixed Eye-point system and Mission Simulator. We got some conclusions not only on the effectiveness for visual system but also on the human behavior in docking maneuver.

• Journal of Biomedical Engineering Research
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• v.42 no.1
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• pp.7-17
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• 2021

In the case of domestic medical device advertisements, it is possible to proceed with the advertisement after medical device certification, and pre-deliberation is possible based on the medical device technical document. However, there are some medical device advertisements that stakeholders in administrative procedures have no choice but to misunderstand in customs and laws that do not consider users. In addition, medical equipment and the pre-deliberation system were judged to be unconstitutional, and unconstitutional decisions were made in accordance with the principle of prohibiting pre-censorship based on the Constitution. This is because in domestic medical device advertisements, structural contradictions and user damage occur in the central structure of each stakeholder. It is necessary to reestablish stakeholder relationships, increase water solubility from customs and laws, and seek new policy proposals. In this study, we reestablish relationships with stakeholders by applying the Autopoiesis theory, and present the grounds and directions that can prevent hype and misidentified advertisements through the establishment of user-centered policies, and the measures to be taken by the Constitutional Court unconstitutional decision.

• Journal of Korea Port Economic Association
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• v.24 no.4
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• pp.47-70
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• 2008

The purpose of this study is to estimate total factor productivity(TFP) growth by stochastic frontier function and to grasp contributing factors of its growth rate by decomposing the total factor productivity into efficiency change, technical progress, scale change, and allocation change. Annual growth rate of total factor productivity for 1990-2003 is 0.019 (1.9%), higher than that of overall industry (0.010). The main component of TFP growth is not efficiency change but technical progress. Contributing factors of total factor productivity growth are change of allocation efficiency in port industry, technical progress in sea-transportation industry, and change of scale efficiency in transportation-equipment industry. The change of total factor productivity shows a decreasing trend since late in the 1990s. The annual technical efficiency of port-logistics industry is less than that of overall industry. Capital elasticity for output (0.391) is higher than labor elasticity (0.227), but scale economy of port-logistics industry is 0.618, which is far from optimal scale economy.

• Journal of Advanced Marine Engineering and Technology
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• v.25 no.1
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• pp.74-86
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• 2001

With the advanced composites technologies and designs advancing faster than ever in the past then years, it has extremely important to keep up with technology by introducing new manu-facturing techniques to advance the industy even more. Specifically, the marine related indus-tries. The United States has preparing for the future by aerospace composite technology to the boat, canoe, kayak and naval vessel busin. This paper will describe one of the methods being implemented to improve quality and structural integrity to compete in the world market.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.05a
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• pp.100-103
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• 2005

The aim of the product noise labeling is to harmonize the noise control act relating to noise emission standards, conformity assessment procedure, marking, technical documentation and collection of data concerning the noise emission in the environment of equipment for use outdoors. It will contribute to the smooth functioning of the internal market, while protecting human health and well-being.

• Journal of The Korean Radiological Technologist Association
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• v.30 no.1
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• pp.111-116
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• 2004

According to technical development of DR modality, DR mortality is being produced by a lot of medical equipment companies ant established quirky in the hospital. Many hospitals which established the existing PACS is planning replacement of modality accord

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1998.11a
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• pp.87-91
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• 1998

전기통신설비중의 이용자가 사용하는 단말장치에 관한 국가 기술기준은 수년간 안정적으로 운용되어 왔으나, 근래에 와서 기존의 아날로그 전화망 접속 위주의 기준 내용을 최근 기술을 수용할 수 있는 구조로 개정하며, 국가간 통신협상 및 통신기기 인증의 상호 인정 추진 등의 추세에 맞추어 외국 규격과의 조화를 도모하고, 정부의 규칙/고시와 통신사업자의 공시 둥으로 분산되어 구조적으로 산만한 체계를 단순화 보완할 필요성을 인식하고 금년 초에 전면적인 개정이 있었다. 이 논문에서는 개정된 단말장치에 관한 기술기준의 제정 개념과 각 기준의 내용을 설명한다.