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서수정(Su Jeoung Suh),유진(Jin Yu),장인배(In-Bae Jang),김영창(Young-Chang Kim) 한국자원식물학회 2022 한국자원식물학회지 Vol.35 No.2
Ginseng (Panax ginseng C.A. Meyer) is a perennial plant and propagates by seeds, and those need after-ripening for germination. To be ready for climate change and to ensure a stable seed supply, the technique for storing seeds in short-term and long-term in large quantities is required. In this study, dehisced ginseng seeds from two locations, batch #1 and batch #2, were stored at -3.5℃ with different moisture content, and after 3, 15, and 27 months of storage, the percentage of radicle emergence and shoot emergence were measured. After 3 months, radicle emergence and shoot emergence were normal only when the seed moisture content was more than 35%, and overall, germination was higher in batch #2 than in batch #1. After 15 months, the partially dehydrated seeds, with a moisture content between 45 to 54%, showed the highest germination rates, and most of the undried seeds were spoiled and failed to germinate. Seeds with moisture content lower than 25% had poor germination, too. The partially dehydrated seeds also succeeded in germination and growth in the soil after 15 months of storage, but deteriorated after one more 1 year, too. In summary, ginseng seeds look like have temperate recalcitrant seed characteristics, and partial dehydration allows extension of seed longevity.
전자석 구동기를 이용한 근육 특성의 정적 추종에 관한 연구
박인황(In Hwang Park),장인배(In Bae Chang),안형준(Hyeong Joon Ahn),한동철(Dong Chul Han),최형연(Hyung Yeon Choi),이인혁(In Hyeok Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Human muscles are generally responded to abrupt force during a vehicle crash, which affects the human body motion significantly during the crash. However, it is very difficult to realize the response of living muscle to the crash dummy, therefore it is ignored in most cases and there are only few reports about on effects of the response of living muscle. In this paper, a new muscle activation system using the electromagnetic actuator and linear springs was developed for the response of living muscle in a crash dummy and the quasi-static characteristics of the Hill-type muscle model was realized with the proposed muscle activation system experimentally. First, the muscle activation system was designed for a typical longissimus capitis muscle, and then a control system was developed to produce the quasi-static force-length characteristics of the muscle. Then, the muscle elongation system was built using a linear motion table which is driven by a ball screw and a servo motor and the muscle elongation test was performed. The test results showed that the proposed muscle activation system generated the quasi-static force-length characteristics of the Hill-type muscle model very accurately. Hereafter, if the performance of proposed muscle activation system is improved considering the dynamic characteristics of the muscle activation system using the frequency response function, then the proposed muscle activation system can be applied to the crash dummy, and it is expected to imitate the human body motion during the crash procedure.
슬림라인형 가스레인지용 쿡탑형 가스 밸브의 개발과 작동 성능 검증
김상주(Sang-Ju Kim),이상철(Sang-Cheol Lee),주광명(Kwang-Myung Ju),이한종(Han-Jong Lee),장인배(In-Bae Chang) 한국유체기계학회 2003 유체기계 연구개발 발표회 논문집 Vol.- No.-
The height of valve body is limited to 30㎜ in the cook-top style gas valves for the domestic gas ranges. But the all the safety specifications of KS should be fulfilled and the magnetic power unit(MPU) should be installed in the valve body for the safety reason. The length of MPU body is longer than the 30㎜ that it should be located in the square direction of the knob shaft and therefore the implementation of the lever mechanism to transmit the press motion of the knob to the MPU valve is very difficult. In this paper, the hinged lever with inclined plate is used to transmit the press motion of the knob to the MPU valve. The analysis of the gas flow with using the commercial software of FLOW-3D shows that the gas flow capacity is fit for the domestic gas range. The performance and responsibility of the valve is tested for the mass production and the test results shows that the valve can be installed in the commercial gas range.
오영택(Oh,Yeong-Taek),박재훈(Park,Jae-Hoon),장인배(Chang,In-Bae) 강원대학교 산업기술연구소 2009 産業技術硏究 Vol.28 No.B
For the environmental safety of the operating room and patient healthcare, the closed type rebreathing system is widely adopted. In order to reduce the anesthesia gas during surgery, the mixing ratio of anesthesia gas with breathing air should be precisely controlled. Generally, the breathing air passes through the vaporizer to mix the anesthesia gas, but there is a difficulty in controlling the mixing ratio precisely. In this paper, the stand-alone style vaporizer is designed and the operating characteristics are investigated. The vaporizer measures the temperature and pressure in the vaporizing chamber and chamber temperature is precisely controlled by proportional controlled heater. Exact quantity of anesthesia media is feeded by PID controlled peristaltic pump and vaporized gas is mixed with breathing air flow by PWM controlled solenoid valve. The experimental result shows that the vaporizer has an excellent command following performances that it can be applied to the low flow anesthesia system.
김중석(Jung Seok Kim),장인배(In Bae Chang) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5
In this paper the research of interlocking system for the multi compressor operation without! mutual communication between the compressors by installing a daughter board at each compressors which has absolute time conversion algorithm. The CPU at the daughter board counts the elapsed time from the absolute time information which is given by the real time clock chip with using absolute time conversion algorithm. The rank of the compressors are automatically cascaded at every exchanging periods and loading and unloading pressures of each compressors are changed according to the rank status. The operating loads of each compressors can be evenly distributed by this rank exchanging techniques that the life cycle of each compressors can be maintained almost the same. Furthermore, the compressor operating informations such as discharging air pressure, discharging air temperature and motor current consumptions can be monitored by a host computer with the graphic user interfacing software and all informations are stored by spreadsheet formats that it is possible to manage the historical data of each compressors.
김남진(Nam Jin Kim),이규환(Kyu Hwan Lee),장인배(In Bae Chang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
??Patients in respiratory distress may be put on machines(ventilators) that fully or partly breathe for them. In the pressure control mode of mechanical ventilation system, not only inspiration but also expiration pressure should be maintained for a given locus, in order to increase the oxygen transfer rate within the breathing cycle. Conventional system uses solenoid valves are adapted for mixing the inspiration gases(air, O₂ and N₂) with on/off mode. Furthermore, the peep valve which is actuated by voice coil, controls the inspiration and expiration pressure with PID control algorithm. The experimental results show that the ventilation pressure which is measured at the expiration path way follows the various types of command signal exactly within the normal breathing pressure ranges that the proposed ventilation circuit and control algorithm have an excellent performances for the mechanical ventilation system.
극소 공기막을 갖는 공기베어링의 직접수치해법을 이용한 정적해석
박상신,장인배,황평,한동철,Park, Sang-Sin,Chang, In-Bae,Hwang, Pyung,Han, Dong-Chul 대한기계학회 1991 대한기계학회논문집 Vol.15 No.1
본 연구에서는 Kawabata가 제안한 직접수치해법(direct numerical solution method)을 확대하여 윤활표면으 국부 회소가스 효과(local rarefaction effect)로 인 한 공기분자의 벽면 미끄름 현상을 고려한 지배방정식을 Navier-Stokes방정식으로 부 터 유도하고 이를 2차원 유동의 경우까지 확대하여 극소틈새와 높은 압축성 계수를 갖 는 경우에 적용하고 그 결과를 기존의 수정된 레이노래즈 방정식의 해석결과와 비교하 고자 한다. An expanded scheme of a direct numerical solution method for solving the Navier-Stokes equation considering the modified boundary conditions for gas lubrication with ultra low clearance at high .LAMBDA. region is presented. Many examples are calculated by this scheme and their results are compared to the previous solutions using P$^{2}$H$^{[-992]}$ . This scheme has the advantages of fast calculation time and stable convergence in high .LAMBDA. region, and gives very good results in the case of fluid film thickness discontinuity.