• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.16 no.6
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• pp.515-521
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• 2003

There are now many theoretical investigations and real manufactures for numerous applications of photonic crystals (PCs) associated with photonic band gap and photonic integrated circuits. However, there are some difficulties to design and fabricate the desired pattern quality. It is not easy to satisfy accurate critical dimension (CD) for patterns with arbitrary shapes and pitch sizes aligned in various directions. In this work, we report the optimum conditions to better fabricate and design, and greatly improve pattern quality in delineating two-dimensional (2D) PCs in the nanometer range using single- step e-beam lithography system with conventional exposure mode.

• Proceedings of the Korea Concrete Institute Conference
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• 2003.05a
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• pp.775-780
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• 2003

The propose of this study is to discover concrete secondary products for proper mixing by lightweight concrete. The standard of water ratio 50% and weight substition 0%, 10%, 20% by Fly-ash. When produce manufactures, there use for maintain its form weight substition and addition among the viscosity agent each Silica-fume and Hydroxy propyl methyl cellulos. Testing method was to operate slump, air content, compressive strength test, rapid freezing and thawing test. The result of this study is appeared when substition Fly-ash generally it had better use Silica-fume.

• Journal of the Korea Fashion and Costume Design Association
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• v.7 no.3
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• pp.39-52
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• 2005

This paper is to study about paisley shawl and paisley motif to focus on Kashmir shawl. Kashmir shawl and paisley shawl of Europe can be identified by the use of 'pine cone' motif. Early 19th Europe textile manufactures began imitating the Kashmir shawl, the motif began to be called 'paisley', after Paisley, Scotland, one of the largest producers of imitation Karshmir shawls. This study is to analyze on origin of shawl and paisley motif at the theoretical background. And main issues are to study on organization of the Kashmir shawl indusry, weaving technic and producing process, development of motif, change of size and border design of shawl, difference of Woven Kashmir shawl, Patchwork shawl and hml shawl, causes of decline to shawl industry, differences of between Kashmir and European shawl etc. The result of this study can help to understand correct and accurate information, knowledge of paisley motif and paisley shawl.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.04a
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• pp.135-140
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• 2013

This paper deals with noise reduction on a light source driving board in a projector. We analyze causes of noise/vibration in the circuit with the present increasing use of LD and LED driving boards. The main source of noise is the MLCC in the driving board. Our aim is to investigate how the mechanical arrangement of the circuit elements affects noise reduction. The result of our experiment shows that noise can be reduced by symmetrical arrangement and slots in PCB. This result is expected to facilitate a variety of applications for manufactures without a need to change circuit elements.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.220-226
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• 1995

A study on the spalling causes of work roll for cold rolling was performed in the cold rolling mill. Performance of work roll is dependent to a great extent on spalling sothat both roll manufactures and users show great interest in spalling. So this paper shows that spalling origin on the roll surface. As being well known, spalling mostlyoccurred due to developing fatigue fracture originated a crack on a roll. But such spalling can be prevented by proper roll maintenance, The spalling accidents have sharply decreased since 1981 because of the use of ultrasonic test to detect cracks on a roll.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.391-392
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• 2006

Gears are essential and useful elements which power is transmitted from a source to a driven equipment. Therefore, it is very important to design gears correctly. Two important points in the gear design procedures are capacities of the gears's bending strength and pitting resistance. This paper deals with two subjects about spur and helical gears : analyzing for strength and wear capacities, and design of face width. Also, this paper proposes the analytical program which is developed for computer aided design and analysis This program is based on the American Gear Manufactures Association(AGMA) Standards.

• Journal of Korea Society of Industrial Information Systems
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• v.6 no.1
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• pp.70-76
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• 2001

The disc type driver with Nd-Fe-B magnet is one of the servo drivers, which have many applications in various fields. For efficient and easy, it is desirable to be small and thin in its size. However, the driver which uses a conventional wire reel is very difficult to be reduced in its volume. one of alternatives to achieve the above goal is the thick film multilayer winding. The winding method will significantly reduce the total volume of the driver. Therefor this paper proposed the thick film multilayer winding methods and consists of parts: design manufactures, properties and applications.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.07a
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• pp.239-241
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• 2012

세계 방송장비 시장은 아날로그 방송시대부터 소수의 다국적 기업이 독과점 구도를 형성하여 온 진입장벽이 매우 높은 시장이었으나 그간 시장을 장악해오던 다국적 기업들이 방송장비 시장에서 어려움을 겪는 반면, 글로벌 IT 업체들과 이러한 환경 변화에 발빠르게 대응하고 있는 중견기업들이 성장의 기회를 맞고 있다. 본 논문은 국내 방송장비 제조업의 현황과 글로벌 방송장비 산업의 현황을 비교하여 대표적인 글로벌 방송장비 업체에 대한 벤치마킹을 통해 향후 국내 업체들의 포지셔닝 방안에 대한 시사점을 제공하고자 한다.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.113-116
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• 2005

Recently the existing environment-friendly method is used in irrigation and drainage canal. So, it is necessary that environment-friendly canal method which is stable and quality. Environment-friendly manufactures which were reflected demand characteristic of drainage and irrigation canal were developed. This study is focused on quality, stability for agricultural district development. According to the results, this method has quaility and economical efficiency, stability and natural characteristic, and will contribute to environment-friendly canal construction.

• Journal of the Korea Furniture Society
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• v.11 no.2
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• pp.61-66
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• 2000

The purpose of this study is to find out the current trend of tradition in Modern Korean Residential-furniture. Sample furniture of 374 pieces made by 21 manufacturers which have been shown in the market in September 2000, are selected for this study. To find out the traditional trend, frequency and percentage are used. As the result of the study, the major trend of design in Modern Korean Residential-furniture is modern style based on Modernism. However, it was found that there are tendency while large firms add western traditional elements in their furniture, small manufactures are trying to develop original furniture design which expresses Korean traditional characteristics. It means that the Korean traditional characteristics are not widely spread in Modern Residential-furniture.