• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전력기술부문
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• pp.419-421
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• 2003

송전선로에서 발생하는 전자계에 대한 관심이 증가함에 따라 이를 저감하는 방법에 대한 연구도 활발하게 진행되고 있다. 본 논문에서는 송전선로에 적용할 수 있는 전자계 저감방법중 하나인 수동루프에 대한 성능을 송전선로의 축소모형 실험을 통해 나타내고 그에 대한 결과를 이론적인 계산 값과 비교하였다. 약 1/20 크기로 축소한 송전선로 모형을 제작한 다음 몇 가지 전압, 전류를 인가하여 선로 주변 전자계를 측정하여 그 결과를 정리하였다.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.72-73
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• 2006

The error function can be calculated based on the Simpson method through a subroutine program. An integration program by FORTRAN language was made for diffusion equations of extended source with infinite extent and limited extent. The results on some alloying elements such as C, Co, Cr, Mn, Mo, Ni and V's diffusion in iron, showed the diffusion distance for Ni and Mo can only be $1{\sim}3\;{\mu}m$ and more distance for Co at common sintering temperature of $1120^{\circ}C$. To refine the particle size of the added elements down to a scale of micrometers is an effective way to get homogeneous distribution.

• 한국가구학회지
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• 제27권1호
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• pp.59-68
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• 2016

The Industrial/Technological Cultural Properties are being protected, the rest facing with demolition and damages. In order to better cope with such situation, Korea has officially introduced the Registered Cultural Properties System since 2001 and began acknowledging the historical values of industrial buildings as modern cultural properties. In the Nordrhein-Westfalen, Germany, there are approximately 3,500 industrial buildings under the cultural asset protection and management not only in the Ruhr-region but also state-wide. Among these, this case study focuses on the Hansa Coking Plant, a large-scale Revitalization project to rehabilitate the old industrial complexes and facility buildings that have been shut down on December 15, 1992. Purpose of this study is to analyze main project plans of each facility in the Hansa Coking Plant and to bring out the main features of the plans, so that they can be utilized to find suggestions for Industrial/Technological Cultural Properties Revitalization in Korea.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 학술대회 및 기술세미나 논문집 디스플레이 광소자
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• pp.45-46
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• 2006

We have studied the viewing angle control using a twist nematic liquid crystal display (TN-LCDs). These TK-LCDs have the characteristics, of which is not good image quality, for examples low Contrast ratio and gray scale inversion problems at upper and down viewing direction. TN-LCDs have the function of switching between the wide viewing mode and narrow viewing angle mode using two tilted LC layers. Tilt angles of the two LC layers, $14^{\circ}$ and $60^{\circ}$ were required in both wide viewing angle and narrow viewing angle modes, respectively. Consequently, this device is compatible with two image performances of which the wide viewing angle mode and Narrow viewing angle mode.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.211-212
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• 2005

Semiconductor fabrication technique has been increasingly developed virtue of greater demands, and supplies and applied semiconductor components in respective processes under development for minuteness. Now semiconductor having a line-width of 75nm was commercialized, and it is possible to scale down to 25nm. Accordingly, to cover with limitations, alternatives are actively investigated. In this paper, we overview the trend and applications of carbon nano tube (CNT) and present the future and technology based on existed theories.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 금형가공,미세가공,플라스틱가공 공동 심포지엄
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• pp.110-113
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• 2005

In recent, various shapes of pattern in micron or nano scale are adapted in many applications due to their good mechanical or optical properties. Light guide panel (LGP) of the LCD is one of important applications for micro pattern and micro prism shape is one of the typical patterns. Many applications have the patterns on their surface and the size of the pattern keep decreasing down to the order of micron or even under micron. On the other hand, the area to be patterned keeps enlarging. These two trends in patterned products require tooling micro patterns on large surface, which has still many technical problems to be solved mainly due to pattern size and the tooling area. In this study, we fabricate prism shape of patterns using diamond cutting tool on some metal core and plastic core like PMMA Some of cutting conditions are investigated including cutting force, cutting depth and speed for different core materials.

• 한국컴퓨터산업학회논문지
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• 제7권3호
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• pp.205-215
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• 2006

본 논문에서는 최근의 64비트 마이크로프로세서에 대해서 PLA설계법 및 검사가 쉽고 용이하도록 하는 방법에 대해서 논하였다. VLSI에서 RAM. ROM. PLA를 사용한 설계법이 정착 되어가고 있으며 PLA는 논리설계와 회로변경 및 검사가 용이하기 때문에 성능과 가격이 중요하다. 향후에도 PLA는 VLSI 설계의 기본요소로서 중요한 위치를 점유할 것이다.

• Advances in concrete construction
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• 제3권1호
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• pp.15-37
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• 2015

Ongoing efforts for improved fracture toughness of engineered cementitious materials address the inherent brittleness of the binding matrix at several different levels of the material's geometric scale through the addition of various types of reinforcing fibers. Crack control is required for crack widths that cover the entire range of the grain size spectrum of the material, and this dictates the requirement of hybrid mixes combining fibers of different size (nano, micro, macro). Use of Carbon Nano-Tubes (CNT) and Carbon Nano-Fibers (CNFs) as additives is meant to extend the crack-control function down to the nanoscale where cracking is believed to initiate. In this paper the implications of enhanced toughness thus attained at the material nanostructure are explored, with reference to the global smeared constitutive properties of the material, through consistent interpretation of the reported experimental evidence regarding the behavior of engineered cementitious products to direct and indirect tension.

• 전자통신동향분석
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• 제33권6호
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• pp.34-40
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• 2018

Traditionally, many researchers have conducted research on terahertz technology utilizing optical devices such as lasers. However, nanometer-scale electronic devices using silicon or III-V compound semiconductors have received significant attention regarding the development of a terahertz system owing to the rapid scaling down of devices. This enables an operating frequency of up to approximately 0.5 THz for silicon, and approximately 1 THz for III-V devices. This article reviews the recent trends of terahertz monolithic integrated circuits based on several electronic devices such as CMOS, SiGe BiCMOS, and InP HBT/HEMT, and a particular quantum device, an RTD.

• Elastomers and Composites
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• 제55권4호
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• pp.329-338
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• 2020

In this study, three different die geometries were selected to understand the die characteristics in the film casting extrusion processes. First, large and small-scale T-dies were numerically simulated to observe the scaled-down effect on the flow inside the dies. Second, three different dies-keyhole, linear tapper coat-hanger die (LTCD), and curved tapper coat-hanger die (CTCD)-were numerically observed and discussed according to the mass flow rate. Finally, the die exit velocity profiles and die characteristics were observed and discussed based on the power-law index for the LTCD die. These numerical simulations and numerical data will aid the optimization of the die design in industrial fields.