• Journal of Mechanical Science and Technology
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• 제19권10호
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• pp.1950-1956
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• 2005

An analysis has been carried out to investigate the effect of the reflectivity on the temperature distribution of a glass panel by infrared radiant heating. Halogen lamps are used to heat the panel, located near the top and bottom of the rectangular chamber. The thermal energy is transferred from the lamps to the panel only by radiation and it is considered by using view factor. The conductive transfer is limited inside the panel. The results show that the uniformity of the temperature distribution of the panel is improved and, at the same time, the time for heating increases as the wall reflectivity increases. The temperature difference between the center and the corner reaches a maximum in the early stage of the heating process and then decreases until it reaches a uniform steady-state value.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.609-612
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• 2002

A new reset waveform is proposed for reducing the reset period. A square pulse is applied to the address electrode while reset pulse ramps and before a discharge between the sustain electrodes occurs. The square pulse induces a discharge between the address electrode and the X electrode, and the induced wall charge is opposite to the applied ramp pulse. Thus, the next discharge between the sustain electrodes becomes weaker. The weaker discharge lowers background luminance and improves contrast ratio. Thus, the new reset waveform can reduce ramp up time in the ramp reset waveform The experimental results show that the ramp up time can be reduced by about 90% compared with the conventional ramp reset waveform.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.540-540
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• 2000

This paper explores design and control methods of a surgical robot for total hip replacement surgery which can be easily maneuvered by a surgeon Like an advanced surgical tool. The 3-DOF in-parallel surgical robot is fixed directly onto patient's femur by the bone clamp during surgery. With the master/slave combined surgical robot, the surgeon can directly control the motion of the surgical robot with surgeon's experience and judgment during operation. For the easiness of operation, the master/slave combined robot is controlled using admittance control paradigm. And for the precise operation, the robot motion is restricted at the surgical boundary using virtual hard wall display.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.589-590
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• 2006

Recently, research for the micro printing technology has begun to get into the spotlight. It is due to the superior price competitiveness to existent semi-conductor process for manufacturing some parts of display unit, electronic paper, RF-ID information device, and so on. This paper present screen printing process not for paper publication but for parts of electronics such as PDP wall, LCD CF, and so on. There are two major issues. The first one is how to get a fine and even line pattern. The other one is how to get the same patterns in large area. In this research, we present the design, equipment, and process control of screen printing in order to overcome these issues.

• Journal of Chest Surgery
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• 제36권1호
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• pp.47-50
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• 2003

폐의 카르시노이드 종양은 기관지 상피의 Kulchitsky 세포에서 유래하는 신경내분비 종양이다. 폐의 카르시노이드는 대개는 중심부에 위치한다. 그러나, 비전형적 카르시노이드는 주변부에 위치하기도 하며 조직학적으로 악성도가 높다 흉막에서 기원한 카르시노이드에 대한 보고는 거의 없는 상태로 저자들은 벽측 흉막에 위치하며 폐실질내로의 침윤이 없이 흉벽을 침윤하는 전형적인 카르시노이드를 보고하는 바이다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2003년도 제24회 학술발표회 초록집
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• pp.231-231
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• 2003

• 한국산업융합학회 논문집
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• 제7권1호
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• pp.13-18
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• 2004

This study investigates actual conditions and awareness of employees female apparel shops within department store in seoul area. Investigating the actual conditions of the lighting indicated that the employees thought that the lighting charged much expenses to them, and the effort to improve the efficiency of current lighting was insufficient for lack of en expert knowledge on the lighting. The average space size of apparel shops were 11.7평, the light source was most frequently used fluorescent lamp and halogen lamp. The illuminance was the most highest nearby wall display(average 1089lx), and nearby hanger(average 1075lx).

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.81-84
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• 2005

A prototype of 25-inch SMPDP module had been developed by the end of 2004. Most driving technologies succeeded to those of the previous 34-inch SMPDP module .In this work, we make an optimization effort on the driving waveforms, especially for setup period. Long ramp waves show good wall voltage controllability, with which we can get a reliable addressing and better sustain stability.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2006년도 춘계학술대회
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• pp.139-144
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• 2006

일반적인 PDP 에 적용된 ADS 방식에서 Reset 파형은 ON/OFF Cell 을 초기화 시켜주고 Wall charge를 쌓아줌으로써 낮은 Address 전압으로도 구동을 가능하게 해준다. 기존의 Reset 파형은 Positive ramp pulse를 이용하여 구현하고 있으나 본 논문은 Negative ramp pulse가 적용된 새로운 Reset 파형을 제안하고자 한다. 2-Dimensional fluid simulation code를 이용하여 Ramp부분에 초점을 맞춰 Reset파형을 분석했으며 제안된 Negative ramp reset 파형은 기존의 Positive ramp reset 파형보다 70V가 낮은 전압에서 방전이 발생되는 것을 확인했다. Negative ramp pulse를 적용됐을 경우, Positive ion들이 모두 Negative ramp pulse가 인가된 Scan전극으로 모이는 현상 때문에 기존 Reset파형에 의한 방전일 때보다 낮은 전압에서의 초기방전을 발생시키므로 Reset에 소요되는 시간과 전압을 감소시킬 수 있다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.931-934
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• 2009

EHA(ethylhexyl acrylate), well known for the prepolymer used for PDLC, was used for the LC/polymer composite system for pixel isolated LC (PILC). In order to improve the polymer wall structures of EHA, various acrylate prepolymers were blended with EHA prepolymer.