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.

하드 디스크와 헤드 시스템의 정상상태에서의 해석

장인배,한동철 대한기계학회 1987 대한기계학회 춘추학술대회 Vol.- No.-

터닝센터의 형상오차 및 열오차 사상변환

장인배 한국공작기계학회 2006 한국공작기계학회지 Vol.15 No.2

Morphological development and photosynthetic acclimation of Panax ginseng seedlings to irradiation by light-emitting diodes (LEDs)

장인배,도경란,Hyunseung Hwang,서수정,Jin Yu,장인복,문지원,Changhoo Chun 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.4

To determine the optimal light intensity and enable plants to cope with various environmental stresses in plant factories, the morphological and photosynthetic characteristics of ginseng seedlings, including the secondary metabolites, were investigated under six light intensities: 25, 50, 75, 100, 125, and 150 μmol m−2 s−1. The shoot length increased with lower light intensity up to 75 μmol m−2 s−1, and the leaf area and specific leaf weight were greatest at 100 and 75 μmol m−2 s−1, respectively. Stomata frequency was higher from 100 μmol m−2 s−1 with higher light intensity, and single stomatal pore length also increased at 150 μmol m−2 s−1. Net photosynthetic rate at light saturation and net photosynthetic rate in growth condition increased sequentially up to 100 μmol m−2 s−1 before rapidly decreasing at 150 μmol m−2 s−1. The dark respiration rate and light compensation point were significantly high at 150 μmol m−2 s−1 only. Fv/Fm and chlorophyll content statistically differed from 63 and 84 days after seedling stand, respectively. Thus, the leaves withered to death with higher light intensity. The ginsenoside content in the roots significantly increased according to the light intensity, and the panaxadiol/panaxatriol (PT) ratio tended to decrease as the PT-type ginsenosides increased further. Taken together, the range of 75–100 μmol m−2 s−1 was found to be beneficial for growth, photosynthetic acclimation response, and total accumulated ginsenosides of ginseng seedlings.

마그네틱 헤드 슬라이더의 極小 空氣膜에 대한 定常狀態 解析

장인배,한동철 대한기계학회 1989 대한기계학회논문집 Vol.13 No.4

This paper analyze the steady state performance of a self-acting air lubricated slider bearing in hard disk/head system. Modified Reynolds' equation is derived from the steady state compressible Navier-Stokes equation, under slip-flow conditions. Finite difference technique and numerical procedure are described by using Newton-Raphson iteration method to slove the non-linear equations. These techniques are applied to conventional slider bearings and the effects of molecular mean free path(MMFP) for a recording surface of hard disk are shown. The calculation procedure developed here, wide applicabilities in practical head design procedures, and converges rapidly.

자기 베어링의 성능한계를 고려한 작동특성 연구

장인배,한동철 한국소음진동공학회 1995 소음 진동 Vol.5 No.1

In this study, we investigated the operational limit of magnetic bearing-rotor system due to the maximum force limit and slew rjate limit of the electromagnetic actuator as a function of the time dependent control characteristics. The feedback gain of the controller varies the current of the electromagnet coil with the motion of the rotor. The distorsion of magnetic force due to the slew rate limit is not occurred jup to 30, 000 rpm in the magnetic bearing that we have a close relation with the rotational speed and vibration level of the rotor and the proportional gain of the controller. Therefore the maximum force limit determines the maximum allowable orbit radius of the magnetic bearing-rotor system. The maximum allowable vibration levels are exponentially decreased according to the increment of rotational speed and proportional gain of the controller.

마그네틱 헤드 슬라이더의 극소 공기막에 대한 동특성 해석

장인배,한동철 대한기계학회 1990 대한기계학회논문집 Vol.14 No.6

본 연구에서는 공기분자간 평균 자유비형거리(molecular mean free path)를 고려한 수정된 레이놀즈 방정식을 공기막 두께의 미소 교란항에 대하여 전개하여 비선 형 정적 평형방정식과 교란 미분방ㄹ정식을 구하였다. 비선형 정적 평형방정식을 슬 라이더의 정량적인 거동형태를 표시하므로 이를 이용하여 슬라이더의 정적특성을 구할 수 있다. 이에 반하여, 동적 교란미분 방정식은 슬라이더의 간극함수에 대한 각종 교란에 의하여 유발되는 반발압력을 정성적으로 나타내므로, 슬라이더의 외부교란에 대한 응답특성 및 자기복원특성 등을 구할 수 있다. 이러한 특성을 서스펜션에 부착 된 헤드 시스템의 운동방정식에 함께 고려하여 시스템의 동적 특성을 해석하고 슬라이 더의 설계변수가 이에 미치는 영향을 고찰하고저 한다. In this paper the dynamic characteristics of self acting air lubricated slider bearing of hard disk/head system are investigated. The dynamic equations of magnetic head mechanism considering both parallel and pitch motion and the time dependent modified Reynolds equation are analyzed and the dynamic pressure distribution of air film is numerically calculated in frequency domain by small perturbation method and finite difference scheme with variable grid. The dynamic response of the slider spacing is obtained accordingly as the moving recording surface vibrates in parallel mode.

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.

PVC DC pipe의 외벽 형상정밀도 향상에 관한 연구

장인배 강원대학교 산·학·연 공동기술개발 지역 컨소시엄 센터 2001 산학협동연구 Vol.- No.4

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.