• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 D
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• pp.2345-2347
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• 2000

ABS(Antilock Brake System) prevents the wheels from "locking" and improve "handling" during braking. Currently, safety and environmental issues are a major concern in the automotive industry. ABS has become the vital brake system. ABS is composed of sensors for wheel speed, a pressure modulator for controlling the brake pressures in the wheel brake cylinders, and an electronic control unit(ECU) which evaluates the signals from the wheel speed sensors and converts these to commands to control the pressure of modulator. In this paper, ECU developed for commercial vehicles is described. Detection of wheel slip, control algorithms of ABS, and diagnosis method of ECU are presented.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 춘계학술대회 논문집 초전도 자성체 연구회
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• pp.69-72
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• 2003

Bi-2223 superconducting wires were fabricated by stacking, drawing process with different precursor powders and different heat-treatment histories. The precursor powders were 2 kinds of Pb content. And a part of the tapes were experienced pre-annealing process which caused tetragonal structure of Bi-2212 phase to orthorhombic structure of it was during drawing process. We confirmed the transformation of Bi-2212 phase from tetragonal structure to orthorhombic structure and reduction of second phases. XRD and DC magnetization analysis were performed in order to investigate the fraction of Bi-2223 phase in Bi-2223/Ag HTS tape. We could achieve best Ic of 70 A class at the Bi-2223/Ag tape using low Pb content of precursor powder and experienced pre-annealing process. DC magnetization analysis was useful to investigate the fraction of Bi-2223 phase in the Bi-2223/Ag tape.

• Communications for Statistical Applications and Methods
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• 제17권2호
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• pp.141-151
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• 2010

Hybrid fuzzy regression analysis is used for integrating randomness and fuzziness into a regression model. Least squares support vector machine(LS-SVM) has been very successful in pattern recognition and function estimation problems for crisp data. This paper proposes a new method to evaluate hybrid fuzzy linear and nonlinear regression models with crisp inputs and fuzzy output using weighted fuzzy arithmetic(WFA) and LS-SVM. LS-SVM allows us to perform fuzzy nonlinear regression analysis by constructing a fuzzy linear regression function in a high dimensional feature space. The proposed method is not computationally expensive since its solution is obtained from a simple linear equation system. In particular, this method is a very attractive approach to modeling nonlinear data, and is nonparametric method in the sense that we do not have to assume the underlying model function for fuzzy nonlinear regression model with crisp inputs and fuzzy output. Experimental results are then presented which indicate the performance of this method.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제54권11호
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• pp.498-502
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• 2005

The objectives of this paper are to provide information on the characteristics of the discharge signals in a low-voltage indoor outlet. Most of electrical fires are caused by short circuits, overheating of wires, deterioration and incomplete connection of wiring devices. The last two cases are predictable before the occurrence of fire because of its slow progress. We have simulated the discharge signals caused by the deterioration and incomplete connection of wiring devices using aged outlets. From the experimental data, we could characterize the frequency spectrums of the discharge signals depending on the cases. The higher frequency components of the signal are attenuated by the capacitance and inductance of power lines as the measuring point is getting away from the discharges. Main frequency components of the discharge signal are existent at 600kHz - 1.5MHz in incomplete connections and at 210H7z - 8MHz in deteriorations of the outlet.

• 한국작물학회지
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• 제54권4호
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• pp.416-421
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• 2009

This experiment was conducted to find out optimum priming treatment conditions to the sesame seed as a preliminary study for enhancing sesame germination properties. Effective priming agents and concentrations for sesame seed were $K_3PO_4$, 200 mM and PEG6000, -1.0 MPa respectively. Optimum priming temperature and duration were $15^{\circ}C$, 4 days in view of germination speed and germination percentage. PEG6000 with -1.0 MPa was selected as an efficient priming treatment condition at $15^{\circ}C$, 4 days. This study suggested that priming treatment to sesame seed would be an effective technique enhancing sesame seed germination and shortening time to the $T_{50}$ at the field condition, but the efficiency of priming treatments to the sesame seed would be strongly dependent on individual or integrated conditions of priming agent, concentration, temperature and duration etc.

• 한국초지조사료학회지
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• 제35권2호
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• pp.119-124
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• 2015

국내육성 톨 페스큐 신품종 푸르미의 종자생산 기술개발과 채종짚의 사료가치 평가를 통해 국내에서 종자생산 체계를 확립하고자 국립축산과학원 초지사료과 시험포장에서 휴폭과 이른 봄 질소 시용량에 따른 종자생산성을 조사하였다. 휴폭 및 이른 봄 질소 시용량에 따른 주요 생육특성은 처리에 따른 차이는 나타나지 않으나 경제성을 고려한 국내육성 톨 페스큐 푸르미 품종의 종자생산성은 휴폭을 15 cm와 이른봄 질소시비량을 90 kg/ha로 처리하는 것이 2톤 이상 안정적인 종자생산을 할 수 있었다. 또한 휴폭이 좁을수록 이삭수 및 종자수량이 높게 나타났으며 이삭의 길이는 휴폭이 넓을수록 더 길었다. 채종종자의 첩립중은 약 2.2g, 발아율은 90% 내외로 나타났다. 휴폭 및 이른 봄 질소 시용량에 따른 채종짚의 생산성은 휴폭이 좁을수록 건물생산성이 높았으나 시비량간에는 일정한 경향이 없었다. 채종후 남은 1차 수확 채종짚은 평균 6,920 kg/ha 생산되었고, 채종 후 2번의 수확에서 건초는 평균적으로 8,134 kg/ha 생산되었다. 채종짚의 일반 조성분 함량은 양질의 건초보다는 다소 낮은 사료가치를 나타내었다.

• 생물정신의학
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• 제11권2호
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• pp.88-93
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• 2004

Background:Serotonin transporter gene-linked polymorphism region(5-HTTLPR) and catechol-O-methyltransferase( COMT) genes are thought to be important factors in some personality traits and the etiology of anxiety disorder. The goal of this study was to determine the role of these genes in personality traits. Method:The participants included 116 healthy adults with no history of psychiatric disorders and other physical illness for the last 6 months. All participants were tested by Temperament and Character Inventory(TCI). The 5-HTTLPR, COMT val158met gene polymorphisms were analyzed with PCR(Polymerase Chain Reaction). Differences on TCI dimensions and sub-scales among groups were examined with t-test and ANOVA. Result:There were possible relationships of the 5-HTTLPR with self-transcendence(P=0.050) and COMT val158met polymorphism with cooperativeness(P=0.053). Conclusion:We found associations between 5-HTTLPR, COMT polymorphisms and the some TCI character dimensions. Further studies of polymorphisms of other genes and their interactions may clarify the complex relationship between personality and genes.

• 미생물학회지
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• 제41권1호
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• pp.87-92
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• 2005

방선균 Streptomyces griseus에서 상업적 목적으로 생산되는 protease인 protease는 serine protease, alkaline protease, aminopeptidase및 carboxypeptidase로 구성되어 있는 복합체로서 의 약용 소염제로 널리 사용되어지고 있다. 본 연구에서는 기존에 개발되어 있는 방선균용 integration vector인 pSET152로부터 목적산물의 대량발현을 위해 방선균용 promoter ermE가 cloning된 새로운 integration vector인 pHJ101을 개발하였고, pretense의 생산량 증대에 사용하였다. 새로 개발된 integration vector에 S. griseus protease A를 코드하고 있는 유전자, sprA와 S. griseus pretense B유전자, sprB를 각각 cloning하여 plasmid pHJ201과 pHJ202를 구축하였다. 이들 plasmid들을 S. griseus IFO 13350에 형질전환하여 발현용plasmid가 chromosome에 integration된 재조합 균주 S. gliseus HA와 S. griseus HB를 얻었다. 이들 재조합균주로부터 전체 protease의 생산량을 확인한 결과, 모균주보다 각각 S. griseus HA는 약 5.3 배, S. griseus HB는 약 5 배 정도 생산량이 증대되었다. 이들 결과로부터 특정유전자의 고발현용 integration vector의 제작이 확인되었으며, 전체 protease의 생산량 증대의 가능성이 시사되었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.952-954
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• 2002

The effort for measuring the rotor vibration caused by the short of rotor winding or air-gap eccentricity has been carried on. This paper introduces on-line vibration monitoring technologies using search coils to measure flux for synchronous generators. A 3,300/6,600 (V), 150 [kW] synchronous generator is built, and search coils are designed and inserted in the wedges. Furthermore, air-gap eccentricity is analyzed by finite element method and compared with experiment tests. Induced voltages caused by different air-gap eccentricity on the search coils are compared as well.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
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• pp.192-194
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• 2001

회전기 고정자 권선에서 발생하는 최대 부분 방전의 연속적인 on-line 측정이 가능한 경제적이고 간단한 hybrid conversion scheme이 개발되었다. 또한 기존의 부분 방전 측정 방식인 single channel analyzer 방식, A/D 변환 방식과 대비하여 hybrid conversion scheme의 장단점이 설명되었으며, 부분 방전 측정 주파수 대역과 부분 방전 측정의 dead time의 영향을 분석하였다.