• Proceedings of the IEEK Conference
• /
• 2002.06e
• /
• pp.201-204
• /
• 2002

A high accuracy ozone monitor using UV absorption method was developed for ambient ozone monitoring. The system was mainly composed of a high power pulsed xenon lamp as UV source, an optical spectrometer with a high sensitivity linear CCD array as UV detector and signal processing unit. The optical signal from the CCD array that provides unusually high response and excellent optical resolution for ozone concentration was converted to digital signal and the digital signal was displayed on screen using PC interface. The optical signal was propagated using optic fiber to reduce optical loss to increase the accuracy of the measuring system. This paper has been studied a interworking signalling protocol between two hybrid networks by analyzing Satellite B-ISDN architecture, DSS2 Layer 3 Signalling protocol, B-ISUP protocol, S-BISUP protocol stack and so on. Also in the paper, messages and primitives have been defined for B-ISDN's Connection Type, Ownership and each protocol in order to connect point-to-multipoint. The ozone sensing properties of the CCD ozone monitor was compared with those of the photo multiplier ozone monitor.

• Proceedings of the KIEE Conference
• /
• 2005.11a
• /
• pp.119-121
• /
• 2005

The problem of lamp life have being solved before electrode-less lamps were developed. But, mercury is using till now. So people are concerned about friendly-environmental lamp, and many researcher hardly study it. In this paper, an ICP lamp which is using Xe gas and Ne gas was designed after optical properties were measured and analyzed. As a result, H-mode properties and penning effect properties were known. Also xenon and neon of properties analyze by spectrum.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.22 no.3
• /
• pp.239-247
• /
• 2009

In AC-PDP, it is necessary to achieve high luminance efficacy, high luminance and high resolution by adopting technologies such as high Xenon concentration, MgO doping, and long gap. However, it is very difficult to apply above technologies because they reduce driving voltage margin. For example, doping of MgO reduces driving voltage but introduces new problems such as increased temperature dependency of discharge, which result in larger variations in driving margin at different temperatures. In this paper, we present the experimental results of the characteristics of temperature-dependent discharges. In addition, we suggest the mechanism of bright noise, black noise, and high temperature mis-discharge, which depend on temperature-dependent characteristics of MgO.

• Proceedings of the KIEE Conference
• /
• 2002.07c
• /
• pp.1893-1895
• /
• 2002

$50{\sim}100$ micron의 지름을 가지는 면광원용 마이크로 할로우캐소드형 태의 플라즈마광 어레이가 2인치 미만의 크기로 제작. 분석되었다. 본 연구에서 제작된 소자들은 금속-절연층-금속의 다층구조로 100 micron 미만의 소자두께를 가지며 $300{\sim}1200$ Torr의 Neon, Xenon 및 여러 기체 mixture에서 안정되게 구동되었고 구동전압은 $100{\sim}150V$ 범위로 관찰되었다. 이 밖에도 대면적 어레이내 소자간 병렬구동을 위한 다양한 구조의 소자들이 제작되었으며, 이들의 방전 및 발광특성, 그리고 전기적 특성이 분석되었다.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1994.05a
• /
• pp.130-137
• /
• 1994

As a part of developing engineering simulator for CANDU 6 nuclear power plants, present paper gives the tentative simulation results of reactor and turbine power transients including reactor-follow-turbine operation. One point kinetics equations are used for neutron dynamics, iodine and xenon loads. To calculate time-dependent high and low pressure turbine powers and grid frequency deviation, simple first order differential equations are used. In addition, control logics (reactor regulating system, demand power routine, and unit power regulator) used in the plant's process computers have been referenced.

• Journal of the Korea Furniture Society
• /
• v.13 no.1
• /
• pp.27-37
• /
• 2002

This study was investigated with the surface properties such as physical and accelerated tests of wood-based floorings. In physical test, hardness and abrasion resistance values of laminate floorings were higher than those of others. The center line average surface roughness($R_a$) of imported laminate flooring was highest value($1.34{\mu}m$) and that of imported solid wood flooring was lowest value($0.62{\mu}m$). In cold resistance and moist heat resistance, no defects were found on the surface of all flooring (crack, blistering, peeling, and gloss loss etc.) after testing. Wet-cold-dry cycle test showed that plywood flooring appeared some cracks. In accelerated weathering test, color difference increased with increasing Xenon arc light irradiation

• Transactions on Electrical and Electronic Materials
• /
• v.6 no.3
• /
• pp.115-118
• /
• 2005

Organic photovoltaic properties were studied in $CuPc/C_{60}$ and $ZnPc/C_{60}$ heterojunction structure by varying the organic layer thicknesses. Current density-voltage characteristics of organic photovoltaic cells were measured using Keithley 236 source-measure unit and a 500 W xenon lamp (ORIEL 66021) for a light source. From the analyses of current-voltage characteristics such as short-circuit current density, open-circuit voltage and power conversion efficiency, optimum thickness of the organic layer were obtained.

• Proceedings of the KIPE Conference
• /
• 2008.06a
• /
• pp.180-182
• /
• 2008

제논램프를 점등시키기 위해서는 램프방전 초기에 수십kV의 고전압펄스를 발생시켜주어야 한다. 고전압펄스의 생성은 주로 transformer의 전자기유도작용을 이용한다. 지금까지는 주로 1개의 고주파 transformer를 이용하여 고전압펄스를 발생시키는 회로가 구성되어 왔다. 이 경우 회로가 단순해지는 이점이 있지만 transformer의 부피가 커지게 되어 상대적으로 보드에서 많은 공간을 차지하게 되는 단점이 있다. 따라서 본 논문에서는 기존의 단점을 해결하고자 고주파 transformer 1개를 사용하는 대신 소형의 고주파 transformer 2개를 2단계 step-up 회로로 구성하였다. 제안된 회로의 구성과 동작에 대하여 분석하였고 실험을 통해 제안된 회로가 유용함을 검증하였다.

• Journal of the Korean Applied Science and Technology
• /
• v.20 no.2
• /
• pp.177-181
• /
• 2003

Ultra-thin films of amphiphillic squarylium dye were prepared on the hydrophillic substrate by Langmuir-Blodgett(LB) technique. In this study, the photoelectric properties of a amphiphillic squarylium dye LB film was investigated. The visible light(${\lambda}$ = 684nm ) of xenon lamp was illuminated on the amphiphillic squarylium dye LB films and light absorptivity and photoconductivity were observed. The photoconductivity was nearly constant regardless of nominal layer number. The photoelectric properties of the amphiphillic squarylium dye LB films with bottom electrode showed better than that top electrode.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 1998.11a
• /
• pp.138-141
• /
• 1998

To evaluate the color change of the opaque resin materials, a measuring system including PAS(photodegradation acceleration system) was constructed. Xenon lamp is used as a light source in the PAS, and the radiant energy from the lamp is irradiated to the samples through serveral high-pass filters with cut-off wavelength in UV and visible region. The color difference of the samples were measured by using the measuring system with a spectrophotometer(CM-2002) and a computer. The result showed that the opaque resin materials changed severely in their color in the wavelength of UV region and changed a little in the wavelength of visible region.