• 대한조선학회 특별논문집
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• 대한조선학회 2008년도 특별논문집
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• pp.90-95
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• 2008

The letters and marks on the hull of vessels are marked by welding bead or steel plate to resist the corrosion environment. It has done by manual work. So, it cause deterioration of welding quality and process delay and so on. The automated welding device for draft mark has developed partially in the field of shipbuilding. But it can be used for draft mark only. And it has caused a few problems about that workablity and movablity are decreased owing to the size and weight of device. So we developed the automated welding device that can be used for most letters and marks on the hull. It designed to 3 axises mobile robot include to ratoation axis and stand alone type controller with multi GUI base on imbedded windows.

• 스마트미디어저널
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• 제5권2호
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• pp.77-83
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• 2016

오늘날 IT 기술의 적극적인 활용을 통해 은행을 비롯한 금융 산업 전체에서 거대한 혁명이 진행되고 있으며, 이를 '핀테크'라 부른다. 핀테크는 2016년 10대 인터넷 산업 이슈의 하나로 조명 받고 있다. 본 논문에서는 보안 강화를 위하여 FIDO 프레임워크를 이용한 NFC 기반 전자 결제 및 쿠폰 시스템에 2 팩터 인증 기술을 적용하기 위한 초안을 설계한다. 세부적으로 프론트엔드의 단말 디바이스에는 2 팩터 인증과 전자 서명 기술의 적용과 백엔드에는 클라우드 기반의 PG를 위한 분석회피형 악성코드 탐지기술을 을 적용하기 위한 연구를 수행한다.

• 정보보호학회논문지
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• 제22권6호
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• pp.1393-1405
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• 2012

기업환경과 금융환경의 변화로 기업 스스로의 임의적이고 자발적인 동기로 이루어지는 제한적인 정보보안 정보의 공개가 아닌 전면적이고 포괄적인 정보보안 관련 정보 공개의 필요성이 제기되고 있다. 본 논문에서는 기존 공시제도의 고찰을 통해 정보보안 분야 공시제도(안)을 제시하고, 공시제도 전문가들의 검토의견을 수렴하여 정보보안 공시제도의 필요성과 정보보안 공시제도 도입의 타당성을 분석하였다.

• 공학교육연구
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• 제16권3호
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• pp.28-41
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• 2013

The purpose of this study was to develop the Meta-Evaluation Criteria which can comprehensively and systematically evaluate and improve the Accreditation Evaluation System for Engineering Education. This will provide useful implications for establishing value, direction, and improvement remedy for Engineering Educations Accreditation System of Korea. In order to achieve the purpose of this study, Meta-Evaluation Criteria was developed to comprehensively and systematically assess and analyze the Accreditation Evaluation System of Engineering Education. The research methodology used to study these subjects: literature review, interviews with experts, Delphi survey (three times), survey, analysis of narrative opinion and secondary source. The results and conclusions of this study can be summarized as follows: First, the final Meta-Evaluation Criteria were developed so as to comprehensively and systematically assess and analyze the Accreditation Evaluation System of Engineering Education. The criteria's validity and reliability were also identified. Specific details are as follows: In a draft plan of the Meta-Evaluation Criteria, Meta-Evaluation concept was defined as evaluation on the whole range of Accreditation Evaluation System of Engineering Education. Meta-Evaluation Criteria was designed to be based on a systematic approach and applies the phased approach to the lower component to reflect evaluation's characteristics. Then validity and reliability of the developed draft plan was verified by calculating Content Validity Ratio (CVR), Degree of Consensus, Degree of Convergence and Cronbach's alpha. The final developed Meta-Evaluation Criteria obtaining validity and reliability were composed of 5 evaluation areas (environment, input, performance, result, utilization), 15 evaluation items, 68 evaluation indicators.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 I
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• pp.310-313
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• 2003

Complex permittivities of human head simulating liquids were measured by a sample holder of terminated slotted coaxial line with a movable probe at mobile communication frequencies. The validity of the liquid measurement system was checked by experiments with the reference liquids. Liquids of ingredients for human brain suggested in IEEE draft and those made by the authors were measured by this slotted line system.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1995년도 VTS and IBS 95 The Korean Institute of Navigation 1995년도
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• pp.118-124
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• 1995

This paper describes the research and development of the Electronic Chart Data base and the Electronic Chart Display and Information System(ECDIS) based on the Draft Soecification for ECDIS of IHO by the Research Group on ECDIS of the Ministry of Communicatios of China, The paper also briefly introduces the systems configuration basic function electronic chart data base of China and the future prospects.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2004년도 춘계학술발표회
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• pp.35-38
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• 2004

IMO 항해안전위원회에서는 능동형 레이더 반사기(Radar Target Enhancer : RTE)를 소형선박에 적용하는 문제를 검토중에 있다. 이에 따라 국내에서도 RTE 개발의 타당성과 이용에 대한 사전검토가 필요한 실정이다. 본 논문에서는 외국에서 보고된 RTE에 대한 실험자료를 토대로 하여 RTE가 가지는 몇가지 중요한 기술적인 문제점들을 분석$\cdot$요약하고, 향후 RTE를 소형선박 뿐만 아니라 항로표지에 설치하고자 할 때, 그 해결방안을 사전검토하고자 한다. 또한 IMO 항해안전 소위원회의 의제를 토의할 때 RTE가 가지는 문제점들을 명확히 이해하여 반영할 수 있도록 함과 동시에 국내에서 RTE를 개발하고자 할 때 중점 연구대상 항목을 제공하는데 그 목적이 있다.

• 한국산학기술학회논문지
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• 제9권6호
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• pp.1523-1528
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• 2008

본 논문에서는 지하주차장 연결통로 및 엘리베이터 홀의 기계식 환기장치의 설치 및 적용을 위한 기초자료를 얻기 위하여 공동주택 지하주차장에 환기장치를 설치하여 실험을 수행하였다. 엘리베이터 홀의 경우 침기 및 누기(자연환기)로 인하여 실제 환기회수는 계산환기회수의 5배 정도 크게 나타났다. 지하 주차장 연결통로 및 엘리베이터홀의 환기장치는 동시 급 배기로 설치하는 것이 좋으며, 설치가 어려울 때에는 차선책으로 급기만이라도 설치하는 것이 공기질 측면에서 좋을 것이라 판단된다. 겨울철 환기장치 가동에 따른 콜드 드래프트의 영향을 고려하여 환기장치의 급기부에 예열기를 설치하는데, 환기시스템의 가동유무 및 가동방법을 다르게 하여도 지하주차장 연결통로 및 엘리베이터 홀의 온도가 $7{\sim}8^{\circ}C$로 일정하게 유지되어 나타나므로 한국의 남부지역에서는 단순 급 배기 환기장치에 예열기를 설치하지 않아도 될 것으로 판단된다.

• 대한조선학회 특별논문집
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• 대한조선학회 2006년도 특별논문집
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• pp.112-121
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• 2006

The vertical displacement of a ship on the basis of the sea level is an important parameter for its stability and control. To indicate the displacement on operating conditions, "draft marks" are carved on the hull of the ship in various ways. One of the methods is welding. The position, shape and size of the marks are specified on the shipbuilding rules by classification societies to be checked by shipbuilders. In most cases, high-skilled workers do the welding along the drawing for the marks and welding bead becomes the marks. But the inaccuracies due to human errors and high labor cost increase the needs for automating the work process of the draft marks. In the preceding work, an indoor robot was developed for automatic marking system on flat surfaces and the work proved that the robot welding was more effective and accurate than manual welding. However, many parts of the hull structure constructed at the outdoor are cowed shapes, which is beyond the capability of the robot developed for the indoor works on the flat surface. The marking on the curved steel surface requiring the 25m elevations is one of the main challenges to the conventional robots. In the present paper, the robot capable of climbing vertical curved steel surfaces and performing the welding at the marked position by effectively solving the problems mentioned earlier is presented.

• 한국염색가공학회지
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• 제28권3호
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• pp.125-133
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• 2016

In this study, efforts were made to enhance the mechanical properties of the poly(vinyl alcohol) (PVA) fibers of medium molecular weight(number-average degree of polymerization=1735) varying the ratio in $DMSO/H_2O$ mixed solvent and spinning/drawing conditions. The gel fibers prepared from pure DMSO were opaquely frozen in the coagulating bath of $-20^{\circ}C$. However, transparent gel fibers were formed without freezing for the mixture to contain water less than 80wt%. As the amount of water in the mixture increased the residual solvent in the coagulated gel fibers decreased ranging from 85 to 42wt%. The complex viscosity increased with increasing PVA concentration in 80/20 $DMSO/H_2O$ exhibiting remarkable shear thinning at 18wt%. In the Cole-Cole plot, the 18wt% PVA solutions gave a deviated curve from 12 and 15wt% ones. Thus the optimum PVA concentration for the spinning processing of medium MW PVA solutions in 80/20 $DMSO/H_2O$ was determined to 18wt% with rheological concept. Low degree of drawing during hot drawing process in the dry state was available for high bath draft in the coagulation bath. The most improved mechanical properties were observed by applying the highest possible draw ratio attained by reducing bath draft over multi-step drawing process. In the given bath draft, linear relationship was observed between both tensile strength and modulus and draw ratio showing the inflection points at the draw ratio of 19.5 and 18.0 for tensile strength and modulus, respectively.