• Journal of Korean Electronics
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• v.4 no.9
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• pp.2-7
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• 1984

• Journal of Korean Electronics
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• v.4 no.9
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• pp.23-27
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• 1984

• Journal of Korean Electronics
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• v.4 no.1
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• pp.24-26
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• 1984

• Proceedings of the CALSEC Conference
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• 2002.01a
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• pp.27-29
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• 2002

◈전방 산업 ·기계공업 자동차, 우주항공, 공작기계, 측정기기 ·전자(전기)공업 가전, 전기용품, 반도체 ·성형가공공업 플라스틱, 고무, 유리 등 ·생활용품공업 완구, 문구, 주방기기 ·건축자재공업 PVC 파이프, 알미늄섀시 ·광학정밀공업 의료기기, 광학기기 ◈후방 산업 ·금형 소재 및 금형부품 금형강, 공구강, 다이세트, 몰드베이스 ·공작기계/공구산업 선반, 밀링, 공구 ·열처리/표면처리산업 담금질, 풀림, 침탄 ·설계/엔지니어링산업 CAD/CAM/CAE ·산업디자인산업 프로토타입, 목형(중략)

• Electrical & Electronic Materials
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• v.6 no.6
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• pp.491-497
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• 1993

현재 고도 산업사회에 있어서 전기, 전자공업에 부과된 역활은 매우 중요하다. 이들은 전기에너지의 고품질화, 고속전파성과 전자회로의 고밀도성에 영향을 받는 전기통신, 정보 제어부문과 이들 관련기기, 부품소자등을 구성하는 재료부문의 3분야로 구분된다. 유입변압기에 사용되고 있는 절연재료의 주된 성분은 일반적으로 광유계 절연유 및 절연지나 pressboard등의 cellulose계 재료가 있다. 본 보고에서는 pressboard를 중심으로 절연지의 특징, 응용현황 및 전망에 대하여 살펴보고자 한다.

• Journal of the Korean association of regional geographers
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• v.3 no.1
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• pp.183-198
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• 1997

This case study was conducted by verification the site characteristics based on the questionnaire and interview obtained from the all factories located at No. 1 developing area in Kumi industrial complex. The site characteristics were presumed from the process of location behavior and spatial linkage. Kumi industrial complex was developed to improve export industry at national levels by providing chief land price and benefiting various tax. Kumi industrial complex which enticed many factories is playing an important role in export industry in Korea. At beginning, the detention of large enterprises promoted the establishment of related small to medium sized factories into the complex. Two distinctive industries. textile and electronic, were reflected by the purpose to establish the complex and industrial characteristics of Taegu city. respectively. In Kumi industrial complex, positive responses on traffic and raw material supply and negative reactions on the environmental impact on social community as well as high labor charge were investigated. Especially the higher labor cost prevented to hire laborers effectively. In the linkages of spatial and raw material, most factories in the complex depended on the availability of out side the Kumi city. For the textile factories, the supply of raw material and parts were relied on Taegu and/or other cities, whereas in electronic factories purchased them mainly from other cities and partly from abroad. Although questionnaire and interview suggested it, most of the parts were supplied by a parts maturing companies on the complex to a few large enterprises. In the marketing linkage, textile factories revealed higher relation-ship with the foreign countries and sewing factories in Korea. On the other hand, electronic factories have strong relation-ships in the marketing linkage to the parts supplying companies in the complex or large-scale resembling companies in other cities. In the textile companies, the right for decision on purchasing raw materials and parts is belonging to the owner whereas mother enterprise usually have the right for the marketing. In the case of the electronic factories, all the purchasing activities are related to the sub-contracting companies. In the service linkage, the Quality of the service created spatial distinction. There was high linkages on inside of Kumi complex for the low grade services such as repairing and installing machines, whereas strong linkages on outside of the complex for the high grade services such as management, law, taxation, new product development. and manufacturing technology. In the linkages of activity on the R&D (research and development), electronic factories do not have sufficiently qualified institutes in the complex. Strong regional linkages in the field of textile and electronic industries revealed limitations of the local industrial complex. In the sub-contracting linkage, high linkage ship within Kumi boundary reflected the characteristics of industrial site in the complex. There, most decisions by the companies centered by the mother enterprise.

• Applied Chemistry for Engineering
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• v.22 no.3
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• pp.272-276
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• 2011

The separation of metallic and semiconducting single-wall carbon nanobubes (SWCNTs) by agarose gel method was carried out in this study. The effect of concentration of agarose, SDS (sodium dodecyl sulfate), and pH in the solution on separation behavior was investigated. With increasing the concentration of agarose in the solution, it showed that the ratio of metallic SWCNTs, which was analyzed from UV-vis-NIR spectroscopy, was increased in the solution phase, while the overall concentration of SWCNTs was decreased. With increasing the concentration of SDS, we could observe that the ratio of metallic SWCNTs was increased due to more affinity between SDS molecules and metallic SWCNT. The highest metallic SWCNTs ratio was reached up to 58.4% when the pH of solution was 8.2.