• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
• /
• pp.702-705
• /
• 2003

We reported the result of driving PDP's in selective erase scheme and three wall charge states. Compared to the selective write driving scheme, the selective erase scheme achieved flicker free half-ON state with much simpler driving waveforms than the selective write scheme. We believed that this improvement was possible since the cells entering the address period with enough wall charges to modulate easily with.

• 한국미생물·생명공학회지
• /
• 제22권4호
• /
• pp.443-445
• /
• 1994

Eubacterium is one of the predominant bacteria in the human large intestine. currently ES (Eubacterium Selective) medium developed by T. Mitsuoka is commonly used as a selective medium. neomycin sulfate which is one of the selective agents of ES medium inhibited about 50% of the growth of Eubacterium isolated, whereas malidixic acid inhibited only 5% while inhibiting other intestinal bacteria. NES medium which replaced neomycin with nalidixic acid in the ES medium was designed and shown to be better for the isolation and enumeration of Eubacterium sp. than ES medium.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2000년도 하계종합학술대회 논문집(5)
• /
• pp.85-88
• /
• 2000

This paper describes a Band-Selective Charge-Pump PLL(CPPLL) for clock recovery and clock generator. The proposed PLL satisfies fast acquisition time and low jitter characteristics simultaneously by reducing initial frequency error. The acquisition time of the designed Band-Selective CPPLL can be decreased down to 55% of a conventional CPPLL.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2009년도 하계학술대회 논문집
• /
• pp.454-455
• /
• 2009

Selective emitter structure have an important research subject for crystalline silicon solar cells because it is used in production for high efficiency solar cells. A selective emitter structure with highly doped regions underneath the metal contacts is widely known to be one of the most promising high-efficiency solution in solar cell processing. Since most of the selective emitter processes require expensive extra masking and double steps process. Formation of selective emitters is not cost effective. One method that satisfies these requirements is the method of screen-printing with a phosphorus doping paste. In this paper we researched two groups of selective emitter structure process. One was using dopant paste, and the other was using solid source, in order to compare their uniformity, sheet resistance and performance condition time.

• 한국환경과학회지
• /
• 제21권12호
• /
• pp.1449-1454
• /
• 2012

The ion selective microelectrodes (ISME) have been applied to observe the continuous profiles of NO3-N and NH4-N in bulk solutions or biofilms. In order to evaluate the performance and applicability of ion concentration measuring system, the characteristics, such as slope of calibration curve, detection limit and potentiometric selectivity coefficient were investigated. The slopes of calibration curve showed high degree of correspondence for each target ion concentrations. And the detection limits of nitrate and ammonia ion selective microelectrode were 10-4.7 M and 10-4.4 M, respectively. These ion selective microelectrodes were proved that their own performance could be maintained for 16 days after making. NO3-N and NH4-N selective microelectrodes were also adapted to detect the continuous ion profiles of cilia media packed MLE (Modified Ludzack-Ettinger) process. And the monitored nitrate and ammonia ion profiles with the ion selective microelectrode were stable and well corresponded to the results with conventional ion chromatograph. However, the electric potential was unstable until 8 hr because of the unknown noise. The tip shape and performance of the ion selective microelectrode was stably kept over 2 days continuous monitoring.

• 한국전자파학회논문지
• /
• 제14권10호
• /
• pp.1060-1070
• /
• 2003

국내 위성통신용 Ku/Ka 대역 파라볼라 안테나에 적용될 수 있는 삼중 사각 루프 슬롯 배열 형태인 새로운 주파수 선택 반사기 구조를 제시하였다. 본 논문에서 설계, 제작된 주파수 선택 반사기 구조는 다층 유전체인 하니콤 위에 삼중의 사각 루프 슬롯으로 구성되는 단위 소자가 평면에 2차원적으로 주기적인 배열 형태를 지닌다. 주파수 선택 반사기를 제작하여 측정한 결과 계산 결과와 일치되었으며, 요구되는 사양대로 14/12 GHz대 주파수에서는 입사파의 대부분이 투과되는 반면, 30/20 GHz대 주파수에서는 전반사가 일어남을 확인하였다.

• 한국생산제조학회지
• /
• 제24권1호
• /
• pp.75-80
• /
• 2015

This paper proposes a selective electrodeposition process that uses laser masking and a DC voltage. Selective electrodeposition using laser masking and a DC voltage is more efficient than that using laser masking and a pulse voltage. In other words, electrodeposition with a DC voltage allows for precise selective deposition without the limitation of the deposition region. Also, a selective electrodeposition method that uses laser masking and DC voltage can reduce the electrodeposition time. The characteristics of a copper layer deposited by laser masking and DC voltage were examined under various conditions. A selective copper layer with various micro patterns of $2{\mu}m$ thickness was successfully fabricated.

• 분석과학
• /
• 제18권6호
• /
• pp.491-494
• /
• 2005

The main component governing selectivity in ion-selective electrodes and optodes is the ionophore. For this reason, a member of natural products that possess selective ion-binding properties have long been sought after. By applying this principle, the performance of cyclosporin used as neutral carriers for calcium selective polymeric membrane electrode was investigated. The calcium ion-selective electrode based on cyclosporin gave a good Nernstian response of 26.6 mV per decade for calcium ion in the activity range $1{\times}10^{-6}M$ to $1{\times}10^{-2}M$. The optimized calcium ion-selective electrode displayed very comparable selectivity for $Ca^{2+}$ ion against alkali and alkaline earth metal ions, $Na^{2+}$, and $Mg^{2+}$ in particular.

• 한국콘텐츠학회논문지
• /
• 제22권4호
• /
• pp.261-272
• /
• 2022

본 연구는 유튜브 정치동영상 이용자 420명을 대상으로 정치성향의 선택적 노출과 태도극화 및 온라인 정치참여의 관계를 규명하였으며, 선택적 노출과 온라인 정치참여 관계에서 태도극화의 매개효과에 대해 살펴보았다. 자료는 SPSS 21.0 프로그램과 AMOS 21.0 프로그램을 이용하여 탐색적 요인분석과 상관관계분석, 구조모형분석을 실시하여 주요 결과를 도출하였다. 그 결과 첫째, 선택적 노출은 태도극화에 정적 영향을 미치는 것으로 나타났다. 둘째, 선택적 노출은 온라인 정치참여에 정적 영향을 미치는 것으로 나타났다. 셋째, 태도극화는 온라인 정치참여에 정적 영향을 미치는 것으로 나타났다. 넷째, 태도극화는 선택적 노출과 온라인 정치참여의 관계를 매개하는 것으로 나타났다. 요약하면, 유튜브 정치동영상에 대한 선택적 노출은 태도극화와 온라인 정치참여를 높이고 선택적 노출에 의해 태도극화가 강화될수록 온라인 정치참여로 이어진다는 사실을 확인하였다.

• 한국환경과학회지
• /
• 제11권6호
• /
• pp.577-582
• /
• 2002

Selective catalytic reduction and selective non-catalytic reduction processes are mainly used to treat nitrogen oxidants generated from fossil-fuel combustion. Especially, the selective non-catalytic reduction process can be operated more economical and designed more simply than the selective catalytic reduction. For this reason, many researchers carried out to increase the removal efficiency of nitrogen oxidants in the condition of low oxygen concentration by using the selective non-catalytic reduction process. However, this study was flue gas contained high oxygen concentration of 20(v/v%) with ammonia as a reducing agent. Moreover, it carried out experiment with many factors that are reaction temperature, retention time, initial NO concentration, NSR(normalized stoichiometric ratio). It was determined optimal operating conditions to improve NO removal efficiency with SNCR process. The De-NOx efficiency was increased with NSR, initial NO concentration and retention time increasement. This study has NO removal efficiency over 80% in the high oxygen concentration as well as low oxygen concentration. The injection of reducing agent may be considered for SNCR process and facility operation in 850$\^{C}$ of optimal condition.