• 식물병연구
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• 제19권1호
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• pp.31-35
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• 2013

콩 저항성품종 육성의 기초자료로 이용하고자 국내 13개 콩 씨스트선충 집단을 대상으로 HG type를 조사하였다. 국내 콩 씨스트선충 HG type는 0, 2, 5, 2.5, 1.2.7, 2.5.7로 총 6개의 HG type가 발견되었다. 그중 HG type 2.5가 30.8%로 가장 많았으며 다음으로 HG type 2.5.7(23.0%)이었다. 각 indicator별로는 PI 88788 가해 집단이 76.9%, PI 209332 가해 집단이 61.5%, PI 548316('Cloud') 가해 집단이 30.8%, PI 548402('Peking') 가해 집단이 7.7%였고 PI 90763, PI 437654, PI 89772를 가해할 수 있는 콩 씨스트선충 집단은 없었다. PI 90763, PI 437654, PI 89772은 국내 모든 콩 씨스트선충 집단에 대해 저항성으로 나타나 저항성품종 육성 교배 모본으로 이용될 수 있을 것이다.

• 전자공학회논문지
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• 제50권7호
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• pp.281-285
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• 2013

벅 컨버터 LC 필터의 라플라스 변환 회로에서 전압 분배 법칙을 사용하여 전달 함수를 구하였다. 참고문헌에서 제안된 Type2 제어기의 근 궤적과 시뮬레이션 파형으로부터 제어기 설계가 잘못된 것을 나타내었다. PI 제어기를 근 궤적 기법으로 설계하였다. PI 제어기를 연산 증폭기를 사용하여 구현하였다. 제대로 동작하는 Type2 제어기를 제안하고 시뮬레이션을 통해 결과를 확인하였다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1997년도 추계학술대회 학술발표 논문집
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• pp.185-188
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• 1997

In this paper, a fuzzy precompensated PI controller for inverter-type air-conditioner is presented. The presented control scheme is composed of a fuzzy logic precompensator and PI controller, in which two control schemes are serially connected. The rules of the fuzzy precompensator is designed to improve the performance by considering the nonlinear characteristics of a temperature dynamics. The experimental results show the effectiveness of the proposed controller.

• Journal of Electrical Engineering and Technology
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• 제13권1호
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• pp.211-219
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• 2018

This paper designs a nonlinear PI-type controller for the robust control of a boost DC-DC converter using a particle swarm optimization (PSO) algorithm. Based on the common knowledge that the transient responses can be improved if the P and I gains increase when the transient error is big, a nonlinear PI-type control design method is developed. A design procedure to autotune the nonlinear P and I gains is given based on a PSO algorithm. The proposed nonlinear PI-type controller is implemented in real time on a Texas Instruments TMS320F28335 floating-point DSP. Simulation and experimental results are given to demonstrate the effectiveness and practicality of the proposed method.

• 대한수학회보
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• 제52권2호
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• pp.439-452
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• 2015

In this paper we introduce and study the new properties ($W_{\Pi}$), ($UW_{{\Pi}_a}$), ($UW_E$) and ($UW_{\Pi}$). The main goal of this paper is to study relationship between these new properties and other Weyl type theorems. Moreover, we reconsider several earlier results obtained respectively in [11], [18], [14], [1] and [13] for which we give stronger versions.

• 융합신호처리학회 학술대회논문집
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• 한국신호처리시스템학회 2001년도 하계 학술대회 논문집(KISPS SUMMER CONFERENCE 2001
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• pp.105-108
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• 2001

In this paper, we proposed a variable structure controller with fuzzy PI-쇼pe reaching law. we fuzzified as inputs to fuzzy system Rf(representative point's orthogonal distance(rd) to switching surface and RP's distance(r) to the origin of the 2-dimensional space whose coordinates are the error and the error rate. The increments of the coefficients $k_{p}$ and $k_{i}$, of the reaching law are calculated appropriate by the simplified Mamdanl inference. The proposed fuzzy PI-type reaching law makes it reduce the chattering and has no need to tune the PI parameters of reaching law. The effectiveness of the proposed fuzzy PI-type reaching law is shown by the simulation results of the control of a Ball-balance System.

• 한국전기전자재료학회논문지
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• 제16권9호
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• pp.826-832
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• 2003

Blending effects for generating a pretilt angle in nematic liquid crystal (NLC) with negative dielectric anisotropy on the blended polyimide (PI) of homeotropic and homogeneous alignment surface were studied. Also, we investigated the EO performances for the advanced VA- $\pi$ cell using this homeotropic blended PI surface. A many decrease of tilt angle on the polymer surface to blend homeotropic PI and homogeneous PI with side chain type was measured, and the tilt angle decreased as blended ratio and rubbing strength increase. However, a small decrease of tilt angle on the polymer surface to blend homeotropic PI and homogeneous PI with main chain type was measured. The blended effects for generating a pretilt angle were clearly observed, and the many decrease of tilt angle can be achieved by using the blended PI surface. The electro-optical (EO) characteristics using the advanced VA- $\pi$ cell using the homeotropic blended PI surface than that of conventional VA cell can be improved. We suggest that the developed advanced VA-$\pi$ cell on a homeotropic blended PI surface is a promising technique for the achievement of a fast response time, and a high contrast ratio.

• 한국식품위생안전성학회지
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• 제25권3호
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• pp.258-262
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• 2010

Radiotherapy is one of the major therapies for cancer treatment. p53 acts as a central mediator of the cellular response to stressful stimuli, such as radiation. Recently it has been known that activation of the phosphatidylinositol-3-kinase (PI3K) pathway is associated with radioresistance. In this study, we investigated whether X-irradiation up-regulates PI3K in a p53-dependent manner in human colon cancer cells. In order to study this phenomenon, we have treated p53-wild type and p53-mutant type HCT116 cells with X-ray. Treatment of wild type HCT116 cells with 8 Gy resulted in a marked increase in PI3K (p85), which paralleled an increase in PTEN, a counterpart of PI3K. However, these effects of X-rays in the p53-mutant cells were not observed. These results suggest that the X-irradiation-induced up-regulation of PI3K/PTEN pathway is p53-dependent.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.1
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• pp.199-202
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• 2003

We have investigated the generation of pretilt angle for a nematic liquid crystal (NLC) alignment with rubbing alignment method on two kinds of polyimide (PI) surfaces using thin plastic substrates. The generated NLC pretilt angles on the pre-imidized type PI are about $3.8^{\circ}$ by the rubbing alignment method with thin plastic substrates, However, the pretilt angle measured at about $2.8^{\circ}$ lower on the polyamic acid type PI than by pre-imidized type PI surface with thin polymer film. The tilt angle increases as increasing curring temperature for making polyimide layer using polyamic acid type PI. It was concluded that pretilt angle in the polyimide surface is attributable to the increasing of imide rato.

• 대한화학회지
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• 제26권5호
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• pp.265-273
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• 1982

두다른 방법을 사용하여 사면체 및 사각형[M(Ⅱ)$O_2S_2$] 형태 착물의 쌍극자모멘트에 대한 ${\pi}$결합의 영향을 고찰하였다. 그첫째 방법은 금속이온의 원자가 궤도함수와 리간드 궤도함수 사이의 혼성계수 CM이 ${\sigma}$ 및 ${\pi}$결합 분자궤도함수에 대하여 모두 같다는 가정에 기초를 둔 근사 분자궤도함수 법이며 다른 하나는 반경험적인 LCAO-MO법에 기초를 둔 계산이다. ${\sigma}$ 결합만이 형성되었다고 가정한다면 사면체 및 사각형 착물의 계산한 쌍극자 모멘트는 실험치 보다 작다. 계산한 쌍극자 모멘트에 ${\pi}$결합의 기여분을 모두 고려 해 준다면 사각형 및 사면체 $[M (II)O_2S_2]$형태 착물의 계산한 쌍극자모멘트는 실험치보다 크다. 그러나 ${\pi}$결합이 비편재 되었다고 가정한다면 사면체 [M(II)$O_2S_2$]형태 착물의 계산한 쌍극자 모멘트가 실험치 범위안에 들지만 사각형착물의 쌍극자 모멘트는 실험치에서 벗어난다. 이 결과는 [M(II)$O_2S_2$]]형태 착물이 비극성 용매의 용액에서 사면체 구조로 존재함을 암시하며 이 구조는 실험구조와 일치한다. 사면체 [M(II)$O_2S_2$] 형태착물의 계산한 쌍극자모멘트는 쌍극자모멘트에 ${\pi}$결합이 참여함을 지적한다.