• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.30-32
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• 2001

There are many difficult problems in analyzing the flow characteristics in a high voltage circuit breaker such as shock wave and complex geometries, which may be either static or in relative motion. Although a variety of mesh generation techniques are now available, the generation of meshes around complicated, multi-component geometries like a gas circuit breaker is still a tedious and difficult task for the computational fluid dynamics. This paper presents the CFD program for analyzing the compressible flow fields in a high voltage gas circuit breaker using the Cartesian cut-cell method based on the CFD-CAD integration, which can achieve the accurate representation of the geometry designed by a CAD tools. This technique is frequently satisfied, and it will be almost universally so in the future, as the CFD-CAD traffic increase.

• 한국수소및신에너지학회논문집
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• 제34권1호
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• pp.38-46
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• 2023

Carbon neutrality policies have been strengthened to reduce emissions, and the importance of technology road maps has been emphasized. In the global industrial boiler market, carbon neutrality is implemented through fuel diversification of methane-hydrogen mixture gas. However, various problems such as flashback and flame unstability arise. There is a limit to implementing the actual system as it remains in the early stage. Therefore, it is necessary to secure the source technology of methane-hydrogen hybrid combustion system applicable to industrial fields. In this study, control program for methane-hydrogen fuel conversion was developed to expect various parameters. After determining the hydrogen mixing ratio and the input air flow, the fuel conversion control algorithm was constructed to get the parameters that achieve the target oxygen concentration in the exhaust gas. LabVIEW program was used to derive correlations among hydrogen mixing rate, oxygen concentration in exhaust gas, input amount of air and heating value.

• 대한공업교육학회지
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• 제36권1호
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• pp.23-45
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• 2011

이 연구는 저탄소녹색성장의 중요성을 밝히기 위하여 초등학생을 대상으로 창의적 체험활동을 위한 녹색기술교육 프로그램을 개발하는데 있다. 이 교육 프로그램은 준비-개발-개선 단계로 개발하였다. 이 교육프로그램의 개발 결과는 다음과 같다. 첫째, 준비 단계에서 녹색기술교육 프로그램에 대한 학생, 사회의 요구분석과 경상북도교육청의 녹색성장교육실천메뉴얼, 에너지관리공단의 에너지인정도서, 미국의 NEED프로젝트를 바탕으로 녹색 기술에 관한 예비 주제를 선정하였다. 예비 주제는 현실성, 관련성, 활동성의 요소로 최종 주제를 정하였다. 둘째, 개발 단계에서 교육프로그램에 대한 목표를 선정하고, 활동프로그램의 내용을 정하였다. 세부 학습목표와 교육내용, 학습방법, 평가방법을 정하였다. 녹색기술교육프로그램은 에너지, 천기에너지, 태양과 풍력에너지, 그린홈, 그린카, 재활용으로 구성하였다. 셋째, 개선 단계에서 개발된 교육프로그램을 초등학교 교사와 기술교육전문가를 대상으로 타당도를 평가하였다. 초등학생 12명을 대상으로 현장평가를 실시하였다. 개선 요구를 반영하여 프로그램을 재개발하였다.

• 공학교육연구
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• 제23권5호
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• pp.3-15
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• 2020

With the 4th Industrial Revolution, educational change is required to cultivate the ability to adapt in the rapidly changing future. Accordingly, the importance of nurturing convergent talents to create new values using the humanities imagination, science and technology creativity, and engineering problem solving ability has emerged. The purpose of this study is to develop STEAM education program with Daedeok R&D Zone and KAIST resources for middle school and high school level. With this program, we investigated the effectivenss of STEAM education on creative problem solving ability, self-efficacy and the perception of STEAM education with pre-test and poste-test model. For this study, 91 students(46 middle school, 45 high school) participated in STEAM education program. As a result student participated in the STEAM program improved the creative problem-solving ability and students' interest in math and science. Also, students perceived STEAM program provided benefits of science-related career information. The suggestions were discussed based on the results.

• Journal of Magnetics
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• 제3권3호
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• pp.69-73
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• 1998

A drum type magnetic separator was designed and optimized by computer simulation. The separator consisted of rotating outer shell of drum, magnetic flux generator drum which was assembled with numbers of disk type magnet holders, and drum axis around which the magnet holders were fixed. NdFeB magnet blocks were inserted into the disks, and the disks were assembled layer by layer along the drum axis. Magnetic circuits of the separator were simulated on the basis of highest magnetic strength, least cost, and high yield of separation by using a Vector Field S/W employing the Opera-2D program. The separator proved a separation yield of 95% in removing fine iron-base particles, and installed at Hot Rolling Mill of Pohang Iron & Steel Co. In Korea.

• 기술혁신연구
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• 제14권2호
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• pp.167-181
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• 2006

This paper reviews regional innovation policy in Japan. 'Technopolis' policy, the first technology-based regional development policy in the world, was implemented in Japan. Nonetheless, technology-based regional endogenous development did not occur. Then, regional technology transfer was pursued. In order to make use of universities and public research institutes in a region for development, university-industry collaboration and cross-over, such as university spin-offs, were promoted. Within this background, new technology-based regional development policies have been introduced based on a cluster approach. These policies are the knowledge cluster Initiative and the industrial cluster program. However, existing companies have difficulty in carrying out innovation. This paper argues that a cluster to create new start-ups that carry out innovation is also needed and explains a new concept of venturing cluster. Based on this new cluster concept, this paper analyzes the situation of Sapporo in Japan, where many university spin-offs are being created in the biotechnology field.

• 산업경영시스템학회지
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• 제46권4호
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• pp.304-311
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• 2023

The 4th Industrial Revolution and the continuous development of Science and Technology have also required a speedy business promotion method in the defense industry. Advanced countries including the United States are already boldly innovating the existing high-cost and long-term acquisition system with the highest priority in weapons development to cope with the military rise of Russia and China. The Ministry of National Defense and the Defense Acquisition Program Administration have also recently introduced a quick acquisition system and are applying it to business promotion. In addition, some small-scale projects and weapons systems are being reorganized so that they can be managed by the units demanding them. After an organizational diagnosis of the Project Acquisition Group by the Ministry of National Defense in 2020, it has been reassigned as a subordinate unit of the Army Logistics Command from a direct unit managed by the Army HQ. As a result, problems such as work conflict or redundancy have been identified. In addition, a system has been implemented to shorten the acquisition period by applying a rapid acquisition program in the field of weapons systems by benchmarking the rapid acquisition program of advanced countries. The force support system project process will also need to introduce such a quick acquisition system. In addition, the Ministry of National Defense is considering ways to delegate some weapon systems to each military, which will then carry out tasks ranging from requirements determination to project management. Accordingly, it is now time to expand the organization for the management of the Army's weapons system acquisition project. Therefore, in this paper, the Army Project Acquisition Group was analyzed on its organization, acquisition procedures, and cooperation systems, with presentations of development plans for each field.

• 공학교육연구
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• 제13권3호
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• pp.3-10
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• 2010

기업은 차별화된 제품으로 시장 경쟁력을 향상시키기 위해 제품 개발을 전담할 전문 인력을 필요로 하고 있으나, 국내 대학은 산업체에서 필요로 하는 종합적 전문 지식과 실무적 경험을 겸비한 전문 인력을 체계적으로 양성하는 교과과정이 부족한 실정이다. 본 연구는 제품개발 전문 인력 양성을 위한 교과과정 개발을 위해 국내/외 대학의 제품개발 교과과정 운영 현황 및 특성화 방향을 파악하였다. 조사 대상 대학에 개설된 제품개발 교과과정에 대한 정보는 주로 해당 대학의 웹페이지에 게시된 정보에 근간하였다. 국내 대학의 제품개발 교과과정은 단일 학과 중심으로 운영되고 있으며, 학과별 특성화 분야 및 교과과정 규모가 다른 것으로 파악되었다. 한편, 국외 대학의 교과과정은 국내 대학과 차별화된 학제간 연계, 다양한 교과과정 프로그램, 그리고 산학연계를 운영되고 있음이 파악되었다. 본 연구를 통해 파악된 제품개발 교과과정에 대한 운영 현황 및 특성은 신규교과과정 개발 시 유용한 정보로 활용될 수 있을 것이다.

• Journal of Plant Biotechnology
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• 제43권2호
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• pp.181-188
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• 2016

In this study, we developed 15 novel polymorphic simple sequence repeat (SSR) markers by SSR-enriched genomic library construction from Codonopsis lanceolata. We obtained a total of 226 non-redundant contig sequences from the assembly process and designed primer sets. These markers were applied to 53 accessions representing the cultivated C. lanceolata in South Korea. Fifteen markers were sufficiently polymorphic, and were used to analyze the genetic relationships between the cultivated C. lanceolata. One hundred three alleles of the 15 SSR markers ranged from 3 to 19 alleles at each locus, with an average of 6.87. By cluster analysis, we detected clear genetic differences in most of the accessions, with genetic distance varying from 0.73 to 0.93. Phylogenic analysis indicated that the accessions that were collected from the same area were distributed evenly in the phylogenetic tree. These results indicate that there is no correlative genetic relationship between geographic areas. These markers will be useful in differentiating C. lanceolata genetic resources and in selecting suitable lines for a systemic breeding program.

• 방사선산업학회지
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• 제9권1호
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• pp.21-27
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• 2015

The domestic Radiation Technology is integrated into and utilized in various areas and is closely related to the industrial growth in Korea. The domestic use of radiation and RI (Radioisotope) increases in quantity every year, however the level of technology is poor when compared to other developed countries. Manpower training is essential for the development of Radiation Technology. Therefore, this study aimed to propose a methodology for designing systemic education and training model in the field of measurement and analysis of radiation. A survey was conducted to design education and training model and the training program for measurement and analysis of radiation was developed based on the survey results. The education and training program designed in this study will be utilized as a model for evaluating the professional development and effective recruitment of the professional workforce, and can be further applied to other radiation-related fields.