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캐패시턴스형 센서가 내장된 자기베어링 시스템의 작동성능에 관한 연구
장인배,한동철 대한기계학회 1995 대한기계학회논문집 Vol.19 No.9
In this paper, we designed and fabricated the magnetic bearings and built-in type cylindrical capacitive transducers for improving the vibration characteristics of rotating shaft. The eddy current and magnetic field from the electromagnet of the bearing don't affect the measuring signal of the capacitive type transducers so that it is possible to locate the capacitive sensor plates around the magnetic bearing poles and can improve the spillover problem which is induced by the noncollocation of the sensors and actuators. According to the sensitivity calibration schemes using a X-Y table, the cylindrical capacitive transducers have a good linearities in the .+-.70.mu.m range from the geometric center of the sensor plates. The measured results also show high displacement sensitivities of the sensors. According to the performance test of the magnetic bearing which is controlled by the analog PD controllers, we found that the built-in capacitive transducer system successfully measures the journal displacement in the magnetic field and therefore the magnetic bearing system supports the rotating shaft up to 12,000 rpm.
인삼 논재배 시 식물성 유기물 시용 수준에 따른 인삼 생육특성 및 생리장해 분석
장인배,현동윤,이응호,박기춘,유진,박홍우,이성우,김기홍 韓國藥用作物學會 2014 한국약용작물학회지 Vol.22 No.2
This study was carried out to investigate the difference of the content of soil chemical components and growthcharacteristics in six years old ginseng affected by application of decomposing plant residues in paddy-converted field. Theresults show that aerial parts of ginseng are no difference between press cake (PC) 200㎏/10a and control but subterraneanparts of ginseng PC 200㎏/10a, especially quantity related root fresh weight and tap root diameter, are statically about 1.6times heavier and about 1.2 times thicker than the ginseng control. Furthermore, the survival rate of PC 200㎏/10a is67.1% rise significantly compare with the control 50.7%. But compared with the PC 200㎏/10a and the PC 400㎏/10a,ginseng root growth and survival rate of PC 400㎏/10a get worse and that increase physiological disorder occurrence ratethan PC 200㎏/10a. Even though there are no significant differences between the ginseng of decomposing plant residuesexcept press cake treatment and the ginseng of control in growth characteristics, it does tend to increase the survival rateand decrease the physiological disorder occurrence rate in most fertilizer treatment except for RSC 2ton/10a, RSC 4ton/10a and RH 4kL/10a. Noted that EC is highly increased and exceeded 1.7ds/m in RSC 2ton/10a, RSC 4ton/10a and RH4kL/10a. It would be caused physiological disorder in many ways and affected ginseng growth characteristics, survival rate.
장인배,도경란,서수정,Jin Yu,장인복,문지원,Changhoo Chun 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.4
Ginseng, a semi-shade perennial plant, is greatly aff ected by light. However, light quality has only been studied in a fewpapers involving growth tests under monochromatic light or based on hairy root cultures. A plant factory with light-emittingdiodes (LEDs) may provide high precision and standardization of ginseng seedlings for transplanting, and plant responsesto light quality should be investigated for designing the optimal lighting conditions for this environment. In this study, variousratios of red light (R):blue light (B) were set from 100:0 to 0:100% at the same photosynthetic photon fl ux density of75 μmol m −2 s −1 . As R increased, the shoot length became longer from R75B25, resulting in the single treatment of R being1.68 times that of B. Compared to monochromatic R or B treatments, the overall growth of ginseng seedlings in R50B50treatment increased. In the mesophyll structure, mixed light as R50B50 or while LEDs increased starch grains, and onlyR treatment led to dense chloroplasts in palisade and spongy parenchyma cells. Increasing R ratios had negative eff ects onCO 2 assimilation rate ( A N ), light-saturated net photosynthesis rate ( A sat ), and chlorophyll parameters. The higher the R ratio,the higher the ginsenoside content in leaves, while roots were less aff ected by spectral changes. Monochromatic R inducedmalformation and senescence of ginseng leaves, while the addition of 25% B was suffi cient to prevent the abnormal developmentof leaves and dysfunctional photosynthetic operation of ginseng seedlings. The results suggest that combinations ofR and B should be considered when designing artifi cial lighting systems for a closed-type plant factory since R aff ects themorphological characteristics and ginsenoside content of ginseng seedlings.
수확시기에 따른 새싹삼의 부위별 생육 및 Ginsenoside 함량 변화
장인배,유 진,서수정,장인복,권기범 한국약용작물학회 2018 한국약용작물학회지 Vol.26 No.3
Background: Since the revised Ginseng Industrial Act was passed, ginseng sprouts have become a new medicinal vegetable for which there is high consumer demand. However, the existing amount of research and data on ginseng production has not kept pace with this changed reality. Methods and Results: In this study we analyzed the changes in the amounts of ginsenosides in different parts of growing ginseng sprouts during the period from when organic seedlings were planted in nursery soil until 8 weeks of cultivation had elapsed, which was when the leaves hardened. In the leaves, ginsenoside content increased 1.62 times with the panaxadiol (PD) system and 1.31 - 1.56 times with the panaxatriol (PT) system from 7 to 56 days after transplantation. During the same period, the total ginsenoside content of the stems decreased by 0.66 - 0.91 times, and those of the roots increased until the 21st day, and then underwent steep declines. The effect of fermented press cake extract (FPCE) and tap water (TP) on the total amount of ginsenoside per plant were similar, and could be represented with the equations y = 1.4330 + 0.2262x - 0.0008x2 and y = 0.9555 + 0.2997x - 0.0031x2 in which y = ginsenoside content x = amount of and on the total amounts of FPCE or TP, respectively after 26.4 days, however, the difference between ginsenoside content with FPCE and TP widened. Conclusions: These results suggested that the amounts of ginsenosides in different parts of ginseng varied with the cultivation period and nutrient supply. These findings also provide fundamental data on the distribution of ginsenosides among plant parts for 2- year-old ginseng plants in the early- growth stage.
축분퇴비 시용 수준에 따른 논전환밭 인삼의 생육특성 및 생리장해 분석
장인배,현동윤,이성우,김영창,김장욱,박기춘,방경환,김기홍 韓國藥用作物學會 2013 한국약용작물학회지 Vol.21 No.5
This study was carried out to investigate the difference of the content of soil chemical components and growth characteristics in five years old ginseng affected by application of manure in paddy-converted field. As all livestock manure regardless of kinds increased along with the whole soil chemical component, including the pH and EC in 2008. Change in the EC of control plot was slightly increased but not exceeded 1 ds/m over the years. However, the changes in the EC of livestock manure regardless of kinds and amounts were highly increased and irregularly exceeded 1.5 ds/m in 2012. The 5 years old ginseng root fresh weight, treatment of fertilizing pig manure compost 4 ton per 10 areas (PMC 4t on/10a) and fowl manure compost 4 ton per 10 areas (FMC 4 ton/10a), were superior to the others. But there were no difference between PMC 4 ton/10a, FMC 4 ton/10a and control. The standing crop rate 39.6%, treatment of fertilizing cattle manure compost 4 ton per 10 areas (CMC 4 ton/10a), was best in all livestock manure. However that was relatively lower than control. Physiological disorder occurrence rates of livestock manure related with leaf and root of ginseng were also higher than that of control. If excessively using non-decomposed livestock manure, It would be caused physiological disorder in many ways. It is a big problem to be producing the quality ginseng. More research is needed to find out the economic and effective fertilizer.