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정병찬(Jung, Byung-Chan),조태경(Cho Tae-kyung) 한국산학기술학회 2008 한국산학기술학회논문지 Vol.9 No.1
본 논문은 초고속 통신 사업자가 적은 비용으로 고효율의 광 통신망 구축을 할 수 있는 설계 방안에 대해 제시한다. 하나의 광 코어를 사용하여 다중의 광 신호를 전송할 수 있는 기술인 CWDM과 DWDM기술에 대하여 비교 분석하고, 고속의 데이터의 장거리 안전하게 할 수 있는 POTICA 재생기 기술에 대한 고찰을 통해 장거리 전송에 나타나는 광 신호의 품질 저하를 TX/RX단의 안정화를 통해 보정에 대해 기술한다. CWDM기반 선로공유장치는 4:1 집선 용 가입자 망을 제공하여 집선 효율이 8배 증가된다. This study presents the design methods that will enable high speed communication companies to establish high efficiency optical communication network at a low cost. This study compares and analyzes CWDM and DWDM technology that transmit multiple optical signals through an optic core, and describes compensation of deteriorated optical signal, which occurs long distance data transmission, through the stabilization of TX/RX terminal to enable long distance data transmission. CWDM babsed line access multiplexer increases concentration efficiency by eight times by providing 4:1 concentration subscriber network.
참깨 開花ㆍ登熟에 關한 硏究11, 草型 別 發育에 따른 光合成 및 關聯 特性 差異
Chui Whan Kang(姜哲煥),Byung Chan Chung(鄭柄贊),Jung Sik Suh(徐貞植) 한국육종학회 1994 한국육종학회지 Vol.26 No.3
Studies were performed to investigate the difference in photosynthesis and related characteristics according to different plant types;growth stage and leaf position in sesame. Three different plant-type varieties were selected from Korean recommended sesame cultivars and used as materials. Average photosynthesis during whole growing period was 1.64 CO₂ ㎎/d㎡/hr. Few-branched type variety “Kwangsankkae” showed 2.006 CO₂ ㎎/d㎡/hr which was the highest one among three plant types. Upper part leaves at maturing stage showed the highest photosynthesis and the next followed with the order of middle part leaves at maturing stage;and leaves of seedling stage. Average chlorophyll content of single leaf through the whole growing period was 3.31 ㎎ per 100㎠ of leaf area(LA) and was highest in few-branched type variety “Kwangsankkae”. Upper part leaves at maturing stage showed the highest chlorophyll content of 4.39 ㎎/100 LA. Average area of single leaf through the whole growing period was 16.5㎠. Middle part leaves at maturing stage in branched type variety “Hansumkkae” showed the highest chlorophyll content among plant types and growing stages. Average specific leaf weight(SLW) during the growing period was 0.0033. The upper part leaves at maturing stage in branched type variety “Hansumkkae” revealed the heaviest one. Average specific leaf area(SLA) during whole growing period was 275 and was highest in the leaves of non-branohed type variety “Danbaeckkae” at seedling stage. Dry weight ratio;SLW and chlorophyll content were positively associated with photosynthesis;while leaf area;fresh and dry leaf weight were negatively correlated with photosynthesis.