• Proceedings of the KIEE Conference
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• 1996.07c
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• pp.1627-1629
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• 1996

Polyvinylidene fluoride( : PVDF) has piezoelectric and pyroelectric. The ${\beta}-PVDF$ manufactured by induced-electric field. In accordance to increasing induced-electric field, the 530 $cm^{-1}$ peak decrease, whereas $510cm^{-1}$ peak increase. The dielectric constant of PVDF thin film is 6.8 and 10 MV/m induced-PVDF thin film is 9.4. The dielectric relaxation characteristic of PVDF thin films correspond to Debye's theory.

• Journal of Life Science
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• v.11 no.2
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• pp.108-110
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• 2001

The E. coli expression system to overproduce a harmful protein, carboxypeptidase Taq was developed. Since expression plasmid pCK305N containing the colicin promoter already has the initiation codon on the restriction site, the initiation codon of the CPase Taq gene was removed. Expression plasmid pCP4-col includes the entire CPase Taq gene, which is directed by the colicin promoter. E. coli cells harboring pCP-col produced a high amount of the enzyme when they were cultured in the present of mitomycin C (0.4 ${\mu}g$/ml). An amount of purified enzyme produced by pCP4-col directed by the colicin promoter was 10.5 mg. This result indicated that the novel E. coli expression system controlled by the colicin promoter could produce almost twice amounts of CPase Taq than the conventional system controlled by the tart promoter.

• Proceedings of the KIEE Conference
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• 1994.07b
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• pp.1400-1402
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• 1994

Plasma polymerized thin films was prepared using an interelectrod inductively coupled gas-flow-type reactor. Styrene was chosen as the monomer to be used. This thin films were also delineated by the electron-beam apparatus with an acceleration voltage 30kV, and the pattern in the resist was developed with RIE 80 with argon gas mixture ratio, pressure and RF power. The molecular structure of thin films was investigated by GPC and FT-IR and then was discussed in relation to its quality as a resist. In the case of plasma polymerization, thickness of resist could be controlled by discharge duration and power. Also etch rate is increased as to growing pressure with RIE 80.

• Proceedings of the KIEE Conference
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• 1994.07b
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• pp.1397-1399
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• 1994

The purpose of this study is to measure the electrophotographic characteristics of double-layered organic photoreceptor made by dip-coating method, and to evaluate an application for the laser beam printer drum. From the result, electrophotographic characteristics of the photoreceptor were depend on the thickness of the CTL and the initial surface potential.

• Proceedings of the KIPE Conference
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• 2007.07a
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• pp.421-423
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• 2007

In this paper, The authors apply a state feedback control using an optimal control theory to improve the stability of the control and the dynamic response of the DC-DC converter system with a number of different loads. To execute a this state feedback control, The authors present the pole placement technique using Linear Quadratic Regulator(LQR) to optimally control the system. An integrator can also be included in the open-loop path in order to minimize the steady-state error of the output voltage. To confirm the superiority of the controller, The simulation results are presented.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.657-659
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• 1993

We have developed a repetitive TEA $CO_2$ laser excited by a magnetic switch pulse source, and have measured the laser output energy for the mixing ratio of the laser gas mixture in single pulse. As a result of experiments, we have obtained the laser output energy of 252 mJ($\eta_{intrinsic}$=7.8%) in $CO_2:N_2$:He=1:1:8(1 atm.). At a repetition-rate frequency of 10 Hz, an average laser power of 1.5 W was obtained.

• Proceedings of the KIEE Conference
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• 1994.11a
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• pp.278-280
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• 1994

The purpose of this paper is to describe an application of plasma polymerized thin film as an electron beam resist. Plasma polymerized thin film was prepared using an interelectrod inductively coupled gas-flow-type reactor. Styrene was chosen as the monomer to be used. This thin films were also delineated by the electron-beam apparatus and the pattern in the resist was developed with RIE and plasma polymerized apparatus. The effect of charge of pressure on growth rate and etching rate of the thin films were studied. The molecular structure of thin film was investigated by FT-IR and then was discussed in relation to its quality as a resist.

• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.1150-1152
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• 1993

$TiO_2-Nb_2O_5$ thin films are fabricated by Sol-Gel method and their electrical properties have been investigated. The crystalline form is amorphous under $400^{\circ}C$ and is anatase over $500^{\circ}C$. The surface conductivity of films is higher that of $500^{\circ}C$ than that of $600^{\circ}C$.

• Proceedings of the KIEE Conference
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• 1995.07a
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• pp.434-436
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• 1995

This paper was to determine the feasibility of controlling subsynchronous resonance(SSR) by the fast modulation of series compensation capacitors. The presence of subsynchronous currents in the system was detected by a subsynchronous relay which was modeled by the transient analysis of control systems (TACS) in the electromagnetic transients program (EMTP). The capacitor segments were switched by bi-directional thyristor swtiches. The paper proved that effective control of SSR can be obtained only by the detuning of the system and the removal or blocking of subsynchronous energy from the system.

• Annual Conference on Human and Language Technology
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• 2023.10a
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• pp.239-244
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• 2023

신경망 기반의 다국어 및 교차 언어 정보 검색 모델은 타겟 언어로 된 학습 데이터가 필요하지만, 이는 고자원 언어에 치중되어있다. 본 논문에서는 이를 해결하기 위해 영어 학습 데이터와 한국어-영어 병렬 말뭉치만을 이용한 효과적인 다국어 정보 검색 모델 학습 방법을 제안한다. 언어 예측 태스크와 경사 반전 계층을 활용하여 인코더가 언어에 구애 받지 않는 벡터 표현을 생성하도록 학습 방법을 고안하였고, 이를 한국어가 포함된 다국어 정보 검색 벤치마크에 대해 실험하였다. 본 실험 결과 제안 방법이 다국어 사전학습 모델과 영어 데이터만을 이용한 베이스라인보다 높은 성능을 보임을 실험적으로 확인하였다. 또한 교차 언어 정보 검색 실험을 통해 현재 검색 모델이 언어 편향성을 가지고 있으며, 성능에 직접적인 영향을 미치는 것을 보였다.