• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.586-589
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• 2002

The Ultra Violet(UV) emission characteristics of Neon + Nitrogen gas-mixture discharge was investigated in AC plasma display panel. The firing voltage of Ne+$N_2$ gas-mixture discharge increased with increasing nitrogen concentration. The UV intensity emitted from the gas discharge also increased with increasing nitrogen concentration. The UV efficiency increase with increasing $N_2$ partial pressure at low $N_2$ concentration, and then UV efficiency is saturated at high $N_2$ concentration.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2000년도 추계학술발표대회 논문집
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• pp.71-74
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• 2000

In this study, the optimal condition of surface treatment for aluminum panel was determined by measuring the contact angle and T-peel strength. The contact angle was measured for various mixture ratios of acetylene gas and nitrogen gas. The mixture (acetylene gas to nitrogen gas) ratios used were 1:9, 3:7, 5:5, 7:3, and 9:1. The contact angle was also measured as a function of time of surface treatment. The results showed that the contact angle was a minimum for mixture ratio of 5:5. T-peel strength was a maximum for the treatment time of 30 second.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1688-1691
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• 2007

This paper shows that the boundary image sticking can be prohibited completely by using the vacuum sealing process, which means that the residual impurities such as nitrogen or oxygen can be a critical factor inducing the boundary image sticking. The production of boundary image sticking was checked in the test panel fabricated by the $N_2$ or $O_2$ flow during the vacuum sealing process. As a result, the boundary image sticking did not appear in the case of $N_2flow$, whereas the boundary image sticking was observed in the case of $O_2$ flow even though the test panel was fabricated by the vacuum sealing process.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.401-404
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• 2003

This paper investigates the effect of plasma treatment of aluminum on the fracture toughness of aluminum/CFRP composites, The surface of the aluminum panel was treated by a DC plasma. The plasma treatment was carried out at volume ratio of acetylene gas to nitrogen gas of 5:5 and the treatment times used was 30 sec. The fracture toughness of plasma-treated aluminum/CFRP' composites was compared with that of untreated aluminum/CFRP composites and The fracture surface of aluminum/CFRP composites was compared with SEM. The results showed that fracture toughness of plasm-treated aluminum/CFRP composites was about 50% higher than that of untreated aluminum/CFRP composites.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2012년도 제38회 춘계학술대회논문집
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• pp.493-497
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• 2012

한국형발사체 3단 엔진에 사용될 7톤급 액체로켓엔진의 연소기의 연소시험을 위해 한국항공우주연구원에 있는 지상연소시험장을 유지 및 운용의 편리성, 유연성, 안전성을 고려하여 개량하였다. 본 논문에서는 개량된 시험 시험설비 주요 변경과 기능에 관하여 서술하였다.

• 대한기계학회논문집A
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• 제25권12호
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• pp.1981-1987
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• 2001

This paper documents the effect of surface treatment of aluminum on the bonding strength of aluminum/CFRP composites. The surface of aluminum panel was treated by DC plasma. The optimal treatment condition of the aluminum was determined by measuring the contact angle and T-peel strength as functions of mixture ratio of acetylene gas to nitrogen gas. The mixture ratios used were 1:9, 3:7, 5:5, 7:3, and 9:1 Lap shear tests and T-peel tests were performed using surface-treated alumiunm/CFRP composites and regular alumiunm/CFRP composites. The results showed that the contact angle was minimized and the T-peel strength was maximized iota the mixture ratio of 5:5. The results also showed that the shear strength of surface-treated alumiunm/CFRP composites was 34% greater than that of regular alumiunm/CFRP composites. The T-peel strength of surface-treated alumiunm/CFRP composites was also 5 times greater than that of regular alumiunm/CFRP composites.

• 한국재료학회지
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• 제24권8호
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• pp.429-433
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• 2014

As the fabrication technology used in FPDs(flat-panel displays) advances, the size of these panels is increasing and the pattern size is decreasing to the um range. Accordingly, a cleaning process during the FPD fabrication process is becoming more important to prevent yield reductions. The purpose of this study is to develop a FPD cleaning system and a cleaning process using a two-phase flow. The FPD cleaning system consists of two parts, one being a cleaning part which includes a two-phase flow nozzle, and the other being a drying part which includes an air-knife and a halogen lamp. To evaluate the particle removal efficiency by means of two-phase flow cleaning, silica particles $1.5{\mu}m$ in size were contaminated onto a six-inch silicon wafer and a four-inch glass wafer. We conducted cleaning processes under various conditions, i.e., DI water and nitrogen gas at different pressures, using a two-phase-flow nozzle with a gap distance between the nozzle and the substrate. The drying efficiency was also tested using the air-knife with a change in the gap distance between the air-knife and the substrate to remove the DI water which remained on the substrate after the two-phase-flow cleaning process. We obtained high efficiency in terms of particle removal as well as good drying efficiency through the optimized conditions of the two-phase-flow cleaning and air-knife processes.

• 한국결정학회지
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• 제13권2호
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• pp.63-68
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• 2002

PDP(Plasma Display Panel)에 적용하고자 하는 녹색 형광체 Zn/sub 2-x/Mn/sub x/SiO/sub 4/를 고상반응법으로 제작하였다. 소성온도, 열처리분위기의 수소와 질소가스의 비 그리고 Mn의 첨가제 및 co-dopant가 형광체의 특성에 미치는 영향에 대하여 관찰하였다. Mn의 농도 x=0.002로 하여 소성온도 1400℃에서 발광특성이 가장 우수하였고, co-dopant의 영향에서는 Cr/sup 3＋/를 첨가하였을 때 다른 첨가제를 사용하였을 때 보다 발광특성이 향상되는 것이 관찰되었다.

• 한국기후변화학회지
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• 제7권4호
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• pp.443-450
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• 2016

The major greenhouse gases (GHGs) in agricultural sector are methane ($CH_4$), nitrous oxide ($N_2O$), carbon dioxide ($CO_2$). GHGs emissions are estimated by pertinent source category in a guideline book from Intergovernmental Panel on Climate Change (IPCC) such as methane from rice paddy, nitrous oxide from agricultural soil and crop residue burning. The methods for estimation GHGs emissions in agricultural sector are based on 1996 and 2006 IPCC guideline, 2000 and 2003 Good Practice Guidance. In general, GHG emissions were calculated by multiplying the activity data by emission factor. The total GHGs emission is $10,863Gg\;CO_2-eq$. from crop cultivation in agricultural sector in 2013. The emission is divided by the ratio of greenhouse gases that methane and nitrous oxide are 64% and 34%, respectively. Each gas emission according to the source categories is $7,000Gg\;CO_2-eq$. from rice paddy field, $3,897Gg\;CO_2-eq$. from agricultural soil, and $21Gg\;CO_2-eq$. from field burning, respectively. The GHGs emission in agricultural sector had been gradually decreased from 1990 to 2013 because of the reduction of cultivation. In order to compare with indirect emissions from agricultural soil, each emission was calculated using IPCC default factors (D) and country specific emission factors (CS). Nitrous oxide emission by CS applied in indirect emission, as nitrogen leaching and run off, was lower about 50% than that by D.

• 한국농림기상학회지
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• 제17권4호
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• pp.326-332
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• 2015

우리나라 밭토양에서 국가고유의 온실가스 배출계수를 개발하기 위하여 2010년부터 2012년까지 봄 배추를 대상으로 재배기간 동안에 $N_2O$를 포집분석한 결과는 다음과 같다. 봄 배추 밭에서의 $N_2O$ 배출량은 정식 후 생육초기인 1개월 정도까지 높게 유지되다가 감소하는 경향을 보였다. 또한 생육초기에 수원지역의 $N_2O$ 배출량이 춘천지역보다 높았는데, 이는 수원의 강수량이 상대적으로 높은데 기인한다고 볼수 있다. 질소비료 시용량이 많을수록 $N_2O$ 배출량이 증가하는 경향을 보였으며, 회귀분석한 결과를 보면 99.8%의 상관성이 보였다. 본 연구에서 3년 동안의 봄 배추 재배기간 중 $N_2O$ 배출량을 분석하여 산정한 국가고유 $N_2O$ 배출계수는 0.0056kg Kg $N_2O-N/kg$ N이였다. 이러한 연구결과는 국가고유 $N_2O$ 배출계수를 등록과 더불어 국가 온실가스 배출량 산정에 적용하여 국가 및 지자체의 온실가스 배출량 감축에도 기여할 것이다.