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        검색결과 2

        1.
        2007.12 구독 인증기관 무료, 개인회원 유료
        Field sequential 액정 디스플레이(FSLCD)는 컬러필터를 사용하지 않아 높은 투과율 특성을 보이고 광 원으로 LED를 사용함으로써 색재현성이 매우 우수하다. 하지만 FSLCD(60Hz 구동)를 실현하기 위해서는 액정의 응답속도가 5ms이하로 고속응답 특성을 보여야 한다. 따라서 본 논문에서는 고속응답 ECB(electrically controlled birefringence) 셀의 최적 구조를 연구하여 5ms 이하의 응답시간을 얻었다. 그리고 ECB 모드에서 높은 구동전압과 시야각을 개선하기 위해 필름 보상을 연구하였다. 판상형 액정필름(discotic film)과 TAC(triacetyl cellulose) 필름의 위상차 값을 최적화함으로써 구동전압을 5V로 낮추고 상하좌우에서 160° 이상(CR>10:1)의 시야각을 실현하였다.
        4,000원
        2.
        2008.10 KCI 등재 서비스 종료(열람 제한)
        This study was carried out to investigate the improvement of soil physical and chemistry in black raspberry sequential field. We had used the subsoil-crusher, oriental herbal, perlite, popped rice hull, burned charcoal of rice hull and peat moss as a soil conditioner. On the whole, the physical and chemistry properties of treated-plots was higher than those of Control field after applying soil conditioners. Before planting, the pH and E.C. range of field was 4.9~5 and 0.5~0.6 ds/m, respectively. After applying soil conditioners, the pH and E.C range of Control field was altered to 4.3 and 2.2ds/m and the pH and E.C range of peat moss-field was 5.2 and 1.3 ds/m. The significant difference(p<0.05) in pH and E.C value was observed between Control-field and peat moss-field. In the size of soil aggregate structure, the aggregate structure weight of Control over 4mm long was 44 g and treatments of perlite, popped rice hull, burned charcoal of rice hull and peat moss was 53 g, 65g, 65g and 72g, respectively. There is a significant difference(p<0.05, 0.001) between Control and treatments. In the results of chlorophyll analysis, all of the treated-plots except for the oriental herbal have a high chlorophyll value (p<0.05, 0.001) compared to the Control. In view of the results so far achieved, there is a great difference on the frequency of dead plant between Control and treatments. The dead plants number of Control, subsoil-crusher, oriental herbal, perlite, popped rice hull, burned charcoal of rice hull and peat moss was 31, 21, 7, 12, 10, 12 and 2, respectively.