• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.247-250
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• 2005

In this paper, new address electrode having separated dual electrodes is suggested to reduce addressing time in ac PDP. It had been found that both the formative and jitter width of the suggested electrode are improved by $10{\sim}20$ % compared with the conventional one on IMID 04'. So we experiment other several kinds of the separated electrodes, and the change in discharge characteristics is analyzed by using a two-dimensional fluid simulation. The key feature of the suggested structure is that the distribution of Xe and Ne ion is controllable during the address periods without significant increases in the capacitive load of the address electrodes.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.485-490
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• 2004

Flywheel Energy Storage System(FESS) consists of a high speed flywheel with an integral motor/generator suspended on non contact bearings and in an evacuated housing. Permanent magnet machines as the FESS motor/generator are a popular choice, since there are no excitation losses which means substantial increase in the efficiency. In this paper, the structural design method of rotor retainer for a high speed motor/generator are presented.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 추계학술대회 논문집
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• pp.17-20
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• 2002

In this paper voltage distribution in stator windings of induction motor driven by IGBT PWM inverter is studied. To analyze the irregular voltage of stator winding, equivalent circuit model of inverter-cable-motor was proposed and high frequency parameter is computed by using finite element method (FEM). Electro-magnetic transient program (EMTP) analysis of the whole system for induction motor and PWM inverter is proposed. Induction motor, 50[HP], and a switching surge generator was built to consider the voltage distribution. The results of EMTP analysis compared with experimental results.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2007년도 추계학술발표대회
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• pp.336-339
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• 2007

모바일의 소프트웨어 테스팅은 매우 중요하다. 그러나 모바일 특성상 일반 어플리케이션의 테스팅과 다른 점이 있으며, 짧은 생명주기 등으로 빠른 출시를 목적으로 테스팅을 소홀히 하는 경우가 있다. 이렇게 테스팅을 소홀히 함으로써 추가적인 유지보수등의 비용으로 기업의 손실로 직결될 수 밖에 없다. 하지만 현재 모바일의 단위 테스트 방법 및 테스트 개발 방법이 미미한 실정이다. 본 논문에서는 TDD방법을 적용하여 모바일의 테스트 방법 및 개발 절차에 대하여 제시하고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.855-858
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• 1995

A neural network has very simple construction (input, output and connection weight) and then it can be robusted against some disturbance. In this paper, we proposed a neuro-controller using a Multi-Layered neural network which is combined with PD controller. The proposed neuro-controller is learned by backpropagation learning rule with momentum and neuro-controller adjusts connection weight in neural network to make approximate dynamic model of DC Servo motor. Computer Simulation results show that the proposed neuro-controller's performance is better than that of origianl PD controller.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1987년도 전기.전자공학 학술대회 논문집(I)
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• pp.429-432
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• 1987

A new LOCOS (Local Oxidation of Silicon) process using a thin nitride film directly deposited on the silicon substrate by LPCVD has been developed in order to reduce the bird's beak length. SEM studies showed that nitride thickness of 50nm can decrease the bird's beak length down to 0.2um with 450nm field oxide. No crystalline defects are observed around the bird's beak after the Wright etch. A 30% improvement in current density was obtained when this new method was applied to MOS transistors (W/L*2.9/20.4) compared to conventional LOCOS process (bird's beak length=0.7um). Other various electrical parameters improved by this new simple LOCOS process are reported in this paper.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 추계학술대회 논문집 학회본부
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• pp.630-633
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• 1997

This paper describes a design of a single phase PWM converter for high speed train. Parallel operation and control method of four Quadrant PWM converters are described. Simulation and modelling of the converters is performed. Capacity of the converter/inverter and power circuit for high speed traction system designed. And harmonic contents of AC line current's are analyzed. The results of the simulation are presented.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.1313-1315
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• 1996

This paper presents a new method to obtain more stable and precise A/D conversion for remote sensing use. Hardware is designed to compensate offset voltage and drift & temperature characteristics, as well as to perform dual slop A/D converter by using single chip microprocessor. Serial communication program which is based on ASCII code commands is also developed to add initial setup & calibration functions as well as to perform A/D data communication. Proposed method will give a good applications to the industrial field where a high precision remote sensing is required.

• Journal of electromagnetic engineering and science
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• 제2권2호
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• pp.93-99
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• 2002

The Cartesian loop chip which is one of key devices in narrow-band Walky-Talky transmitter using RZ-SSB modulation method was designed and implemented with 0.35 Um CMOS technology. The reduced size and low cost of transmitter were available by the use of direct-conversion and Cartesian loop chip, which improved the power efficiency and linearity of transmitting path. In addition, low power operation was possible through CMOS technology. The performance test results of transmitter showed -23 dBc improvement of IMD level and -30 dEc below suppression of SSB characteristic in the operation of Cartesian loop chip (closed-loop). At that time, the transmitting power was about 37 dBm (5 W). The main parameters to improve the transmitting characteristic and to compensate the distortion in feed back loop such as DC-offset, loop gain and phase value are interfaced with notebook PC to be controlled with S/W.

• 복식문화연구
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• 제21권5호
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• pp.755-764
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• 2013

This study intends to use the basic patterns in 3oz bodice and 2oz sleeve padded jackets made for women in their 20s to research the proper ease of 2oz bodice and 2oz sleeve, 4oz bodice and 3oz sleeve padded jackets. The study also proposes a method of designing padded jacket patterns according to padding thickness. The results of this study are as follows: The 2oz bodice and 2oz sleeve padded jackets had the following sizes. The front and back bust, waist, and hip circumferences were calculated as B/4+2.5cm and B/4+3cm, W/4+2.6+3.3(D)cm and W/4+1.5+2.6(D)cm, and H/4+2.8cm and H/4+3cm, respectively. The length of the jacket was 62.4cm, and the sleeve length was calculated as 63.4cm. For the 4oz bodice and 3oz sleeve padded jackets, the front and back bust, waist, and hip circumferences were calculated as B/4+4cm and B/4+4cm, W/4+4.1+3(D)cm and W/4+2.5+3.6(D)cm, and H/4+4.3cm and H/4+4cm, respectively. The length of the jacket was 63.2cm, and the sleeve length was calculated as 64.2cm. The results of this study showed that padded jackets with thicker padding need more ease. For jackets with stitches, the decreased lengths must be added in the pattern length. The 2oz bodice and 2oz sleeve, 4oz bodice and 3oz sleeve padded jackets all scored 4 points or higher in the movement functionality assessment, thus showing outstanding movement functionality.