http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
재배지토양의 화학성이 인삼근중의 당류 및 saponin 함량에 미치는 영향
김동철,장상문,최정 ( Dong Cheol Kim,Sang Moon Chang,Jyung Choi ) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.1
The relationships between the soil chemical properties of ginseng fields and the contents of effective constituents in ginseng roots was investigated. The NO₃-N contents in soils showed highly negative correlations with the contents of total sugar and reducing sugar in ginseng roots. The organic matter contents in soils showed positive correlations with the contents of sugar and ginoside in ginseng roots, while the contents of available phosphorus and exchangeable rations in soils showed highly negative correlations with the those in ginseng roots. For the Production of ginseng root of higher saponin contents, increase of the organic matter contents, and decrease of the contents of available phosphorus and exchangeable rations in soils were recommended.
차량용 DBS 수신을 위한 위성 추적 안테나 제어시스템의 성능 구현
김동철,민경식,Kim, Dong-Cheol,Min, Gyeong-Sik,Arai, Hiroyuki 대한전자공학회 2002 電子工學會論文誌-TC (Telecommunications) Vol.39 No.4
본 논문은 이동하는 차량에서 DBS를 수신하기 위한 위성 추적 안테나 제어시스템의 성능을 기술하고 있다. 이 시스템의 안정도와 추적속도 개선을 위해, 방향센서의 기능이 종래의 좌우 추적 알고리즘에 추가되었다. DBS 수신을 위해 제작된 안테나 시스템의 위성 추적 실험이 고속도로와 도심지역에서 수행되었다. 고속도로에서 측정된 AGC 신호레벨은 TV 시청이 가능한 레벨 이상으로 관측되었다. 따라서 방향센서로 보상된 추적 알고리즘을 가진 하드웨어시스템의 우수한 성능이 확인되었다. This paper describes a performance of a satellite tracking antenna control system for mobile DBS reception. In order to improve the tracking speed and the stability of this system, a directional sensor function is added to a conventional left-right tracking algorithm. The satellite tracking experiments of the fabricated antenna system for the DBS reception were performed at a highway and an urban area. The measured AGC signal level on the highway was observed above the level to watch television. Therefore, an excellent performance of the hardware system with the tracking algorithm compensated for the directional sensor was confirmed.
CuxS를 도입한 Acrylonitrile-Sodium-p-Styrenesulfonate 공중합체의 전기적 성질
김동철,송해영,여창열,Kim, Dong-Cheol,Song, Hae-Yeong,Yeo, Chang-Yeol 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.3
To improve the electrical conductivity of acrylonitrile film, acrylonitrile copolymer was synthesized conductive polymer, which was acrylonitrile-sodium-p-styrene sulfonate complex induced by CuxS. The conclusion obtained from this study are as follows: 1. CuxS-AN-SS film was much influenced by pH, concentrations of CuSO4, (NH3OH)2 SO4, Na2S2O3 and reaction time. 2. The volume and surface resistivities of CuxS-AN-SS was increased by order of 106(cm) in volume resistivities, 107(cm) in surface resistivities than that of AN-SS. 3. The Tm value of CuxS-induces copolymer was lower than that of AN-SS copolymer. 4. The tensile properties of CuxS-AN-SS were generally decreased, and particulary the tensile strength of CuxS-AN-SS was decreased about 45% as compare with that of AN-SS.
김동철,주창환,박세영,Kim, Dong-Cheol,Ju, Chang-Hwan,Park, Se-Yeong 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.11
The dence of processing parameters on the air-jet textured(AIT) yarn was investigated to characterize the structural properties of acetate and viscose rayon fibers. The air-jet texturing nozzle employed was Hemaiet manufactured by Heberlein Co., Swiss and the samples were produced with four diffirent air pressures(i. e.,), 4, 5, 6kg/m2), usage of impact ball and dry/wet conditions. The structural characteristics investigated were yarn instability and fiber configurations such as floats, arcs, potrudes, and cross/closed loops. The results obtained though this experiment was as follows: (1) the instabilities of acetate and viscose A/T yarns were increased with raising the air pressure of nozzle and usage of impact ball due to the increase of loop frequency, (2) the texturing effect of regenerated fibers was partially enhanced by the water application and the use of the impact ball due to the decrease of filament friction and the increase of turbulent air flow in the nozzle, and (3) the surface characteristics of acetate and viscose A/T yarns had the stable loop structure with increasing the air pressure of the nozzle and water application.