• 산업경영시스템학회지
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• 제22권51호
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• pp.175-187
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• 1999

The notion of productivity has been extended from the quantitative change of input factors to the efficiency change meaning efficient use of resources, and to the technical change meaning the qualitative improvement of input resources. In this way, the technical change is termed as total factor productivity in the individual businesses or the manufacturing industries. They should efficiently respond to the variations of economic environment and at the same time, have to make the efforts to improve productivity by increasing managerial efficiency and rasing the level of technology change for the continuous growth. Considering the growing importance of productivity, this study closely examines the factors influctuation on the productivity, fluctuation using total factor productivity in korean manufacturing industries. For the objective this study investigates the methods of measurement about total factor productivity, establishes the hypotheses based on the preceding research and finding. The results are obtained through the examination on the outcoms of regression analysis and related data. The results can be summarized as follows, First, in the progress of korean industrialization, the qualitative growth does not depend on the total factor productivity of the technical advance, and does not lead to the industry expansion. That is, the contribution of total factor productivity turns out to be relatively low. Second, it is necessary for the manufacturing industry to improve the level of technology and to emphasize the innovation of business, since the capital investment does not completely become fixed in the growth rate of productivity. Finally, continuous R&D investment should be made to increase total factor productivity. Namely, the regulation of industrial structure with an intensive technical development is essential and should be based on scientific and technical knowledge.

• Nuclear Engineering and Technology
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• 제49권8호
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• pp.1575-1588
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• 2017

In order to develop a domestic research roadmap for severe accidents, a special committee was established by the Korean Nuclear Society. One of the subcommittees discussed the characteristics and the relevant technical issues in the stages of fission product release and physical forms of radionuclide release and transport. The group members developed a tree to identify fission product release phenomena by tracing failures of individual defense-in-depth barriers and added possible countermeasures against failure. For each elemental issue, they searched for technical problems by examining the phenomena, accident management actions, and regulatory aspects relevant to the mitigation features for containment, including mitigation strategies against containment bypass accidents. Regulatory concerns, including the source term and the acceptance criteria for radionuclide release, were also considered. They identified further research needs regarding important technical issues based on the degree of the current knowledge level in Korea and in foreign countries, looking at the significance and urgency of issues and the expected research period required to reach an advanced level of knowledge. As a result, the group identified the 12 most important and urgent issues, most of which were expected to require mid-term and long-term research periods.

• 대한공업교육학회지
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• 제31권1호
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• pp.1-22
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• 2006

이 연구의 목적은 공업계 고등학교 학생들의 직업기초능력 수준과 중요도를 측정하고 향상방안을 제시하는 것이다. 이 연구의 대상자는 공업계 고등학교에서 산학협동교육을 담당하는 담당자 12명과 기업체 현장실습 담당자 7명 이었다. 이 연구의 결과 직업기초능력의 여러 부분에서 산학협동교육 담당 교사와 기업체 업무 담당자 사이에 인식차가 존재하는 것으로 나타났다. 특히 영어문서이해능력에서는 두 집단 모두 수준과 중요도를 낮게 평가하여 직업기초능력으로 재고할 필요가 있는 것으로 나타났다. 기존 직업기초능력에 추가되어야 할 능력으로는 한자 독해능력, 경청 능력 등으로 밝혀졌다. 직업기초능력을 향상시키기 위해서는 공업계 고등학교 학생들이 습득해야할 직업기초능력의 수준을 정확히 규명하고, 이를 근거로 직업기초능력을 측정할 수 있는 도구의 개발이 뒤따라야 할 것이다.

• 한국생산제조학회지
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• 제7권4호
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• pp.50-55
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• 1998

Mould level control system for continuous casting process involves stick-slip friction in the sliding gate , time-delay, non-linearity, and certain uncertainties such as friction force variations between molten steel and the inner wall of mould. In this paper, sliding mode control technique was used to solve these complex control problem. The controller is then designed and implemented onto the continuous casting process. Testing result shows that sliding mode controller can decrease the fluctuating magnitude of the mould level and is superior to the existing PID controller.

• 한국경제지리학회지
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• 제17권2호
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• pp.335-348
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• 2014

본 연구는 충남가젤산업의 기술수준분석과 산업구조분석을 통해 정책적 시사점을 도출해 보고자 하였다. 분석결과, 충남가젤산업은 규모와 성장성 측면에서 경쟁우위가 있고, 산업효율성이 높아 소득증대 효과가 있었다. 또한 충남가젤산업 중 저기술산업은 첨단기술산업을 제외한, 고기술산업, 중기술수준의 산업보다 산업집적과 산업성장을 거듭하며 빠른 산업구조변화속도로 변모해왔다는 사실을 밝혀냈다. 이러한 분석결과를 바탕으로 다음의 시사점을 도출하였다. 낮은 연구개발 투자에도 빠른 성장과 고용창출을 달성하는 충남가젤산업에 대한 집중한 추가적인 연구개발투자가 필요하며, 산업규모(BQ)와 산업성장율(IG)을 이용한 산업발전단계별 육성전략 추진이 필요하다. 또한 충남가젤산업 중 저기술산업이 고기술산업, 중기술수준의 산업보다 빠른 산업구조적 변화를 보이는 것에 대해 지역의 입장에서 유불리를 심도있게 검토해야 한다. 본 연구에서 분석한 가젤산업을 지역산업정책에 활용한다면 높은 소득증대와 고용창출 등으로 지역산업과 지역발전에 이바지 할 것으로 기대한다.

• 한국산학기술학회논문지
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• 제13권9호
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• pp.3882-3888
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• 2012

일반 간선열차에서 주로 사용하는 저상승강장과 수도권 전동차에서 주로 사용하는 고상승강장을 동시에 안전운행하기 위한 니즈기술로서, 저상/고상 승강장에 상관없이 승하차할 수 있는 철도차량 승강문 스텝장치가 필요하다. 본 연구에서는 이를 대비하여 저상/고상 승강장 겸용 승강문 스탭의 기능 및 제작 요구사항을 검토하였다. 세밀히 검토한 결과, 합리적 설계안은 자체 언더프레임의 손상 및 철도승강장의 이격거리 변동성을 최소화 할 수 있는 텔레스코픽 슬라이딩 스텝방식이라고 판단된다. 또한 다양한 요구조건을 고려하여 각 단계별 스텝 동작 과정 및 제어 흐름도를 제시하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.126-129
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• 2006

The marine environment is under considerable threat from intentional or accidental oil spills, ballast water discharged, dredging and infilling for coastal development, and uncontrolled sewage and industrial wastewater discharges. Monitoring spills and illegal oil discharges is an important component in ensuring compliance with marine protection legislation and general protection of the coastal environments. For the monitoring task an image processing system is needed that can efficiently perform the detection and the tracking of oil spills and in this direction a significant amount of research work has taken place mainly with the use of radar (SAR) remote sensing data. In this paper the level set image segmentation technique was tested for the detection of oil spills. Level set allow the evolving curve to change topology (break and merge) and therefore boundaries of particularly intricate shapes can be extracted. Experimental results demonstrated that the level set segmentation can be used for the efficient detection and monitoring of oil spills, since the method coped with abrupt shape’s deformations and splits.

• 해양환경안전학회지
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• 제30권3호
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• pp.263-274
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• 2024

The digitization of ship environments has increased the risk of cyberattacks on ships. The smartization and automation of ships are also likely to result in cyber threats. The International Maritime Organization (IMO) has discussed the establishment of regulations at the autonomous level and has revised existing agreements by dividing autonomous ships into four stages, where stages 1 and 2 are for sailors who are boarding ships while stages 3 and 4 are for those not boarding ships. In this study, the level of a smart ship was classified into LEVELs (LVs) 1 to 3 based on the autonomous levels specified by the IMO. Furthermore, a risk assessment for smart ships at various LVs in different risk scenarios was conducted The cyber threats and vulnerabilities of smart ships were analyzed by dividing them into administrative, physical, and technical security; and mitigation measures for each security area were derived. A total of 22 cyber threats were identified for the cyber asset (target system). We inferred that the higher the level of a smart ship, the greater the hyper connectivity and the remote access to operational technology systems; consequently, the greater the attack surface. Therefore, it is necessary to apply mitigation measures using technical security controls in environments with high-level smart ships.

• 한국의류학회지
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• 제42권2호
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• pp.211-223
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• 2018

In global apparel product development, flat is one of the most important key factor for technical design communication. Proportionally correct flats based on correct scaled human body figures are imperative to be successful in the fashion business. In this study the researchers were to develop body templates for flats for Korean women body types using data from 'Size Korea 2004 (5th)', which is a Korean government apparel sizing project to analyze women's body measurements (age range 7-49). We measured 13 height measurements, 6 width measurements, 8 circumference measurements, 6 length measurements, 3 angle measurements and 5 body measurements. A body figure (i.e., schema) for each group was created by Pattern Design Software (PAD) System 4.1. Muscle was added to the schema created by Adobe Illustrator to ensure a better visualization and convenience for industry uses for flats. Developed body figure template of representative type had the largest difference in height level compared to exiting figures. It had a bigger head, lower crotch level, and longer crotch depth and hip length than existing figures.

• 융합보안논문지
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• 제1권1호
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• pp.9-20
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• 2001

전 세계가 정보화의 물결 속에서 보다 신속하고 안전한 정보의 교류를 위한 기술 개발 및 연구는 시간의 변화와 더불어 급변하고 있다 정보의 중요성과 효용가치의 증대는 다양한 분야에서의 기술 발전을 함께 필요로 하게 되었고 특히, 정보보호의 필요성은 그 핵심기술로 자리잡게 되었다. 하지만, 대부분의 시스템 공격이 운영체제의 취약선을 기반으로 하고 있어, 응용 레벨에서의 보안 기술만으로는 소기의 목적을 달성하기에 어려움이 있다. 이런 문제점을 해결하기 위해 운영체제 자체에서 안전하고 신뢰성 있는 서비스를 제공하는 기술에 대한 연구가 많이 이루어지고 있다. 따라서 본 고에서는 현재 보안커널의 세계적인 추세와 동향을 파악하고자 안전한 운영체제 개발 프로젝트들을 소개하고 전자서명 검증을 운영체제 수준에서 수행하여 홈페이지 등의 파일시스템의 위ㆍ변조를 원천적으로 방지하는 File Griffin에 구현된 보안 메커니즘에 대하여 알아본다.