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EIA-709.1 Control Network Protocol을 이용한 필드버스 시스템 구현
최병욱,김정섭,이창희,김종배,임계영 제어·자동화·시스템공학회 2000 제어·자동화·시스템공학논문지 Vol.6 No.-
EIA-709.1 Control Network Protocol is the basic protocol of LonWorks systems that is emerging as a fieldbus device. In this paper, the protocol is implemented by using VHDL with FPGA and C program on an Intel 8051 processor. The protocol from the physical layer to the network layer of EIA-709.1 is implemented in a hardware leval. So it decreases the load of the CPU for implementing the protocol. We verify the commercial feasibility of the hardware through the communication test with Neuron Chip, based on EIA-709.1 protocol, which is used in industrial fields. The developed protocol based on FPGA becomes one of IP and we are able to implement SOC for the terminal device in the distributed control systems. Also, the result can be applicable to various industrial field because it is implemented by VHDL.
정전 분무를 이용한 미세 물 액적 생성 및 습식 사이클론 적용 방안에 관한 연구
최종원(Jong Won CHOI),정대헌(Dae Hun CHUNG),이계중(Kye Jung LEE),김정근(Jeong Guen KIM),최영찬(Young Chan CHOI),이욱현(Wook Hyun LEE),우영민(Young Min WOO),오상현(Sang Hyun OH),윤민혜(Min Hye YOUN) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
A historically well-known technique for atomizing the liquid water droplets may be electrospray, which is induced by electrostatic charging inside a confined geometry such as needle, nozzle or slit. Based on the Rayleigh’s theory of instability and Taylor’s theory, the electrospray enables to produce fine water droplets as forming a conical shape (Taylor cone) due to the highly concentrated free charge from high intensity of electrical potential between two oppositely charged electrodes. We herein applied this technology to the wet electrostatic precipitator, especially in cyclone structure. The wet electrostatic precipitator has been reported to possess a few flaws such as un-uniform water film formation on the wall, excessive waste water and large energy consumption. Applying the negative potential to the needles and the positive potential to the collector body, we observed sub-100㎛ water droplets are generated by means of an electrospraying process without any pressure. Such highly charged droplets pull the fine particles inside a flue gas, stick to the collector body and then finally free fall down. In this study, we designed and fabricated the electrospray driven wet cyclone electrostatic precipitator, investigating the particle collection performance with the tangential velocity of ~10 m/s at the cyclone inlet, for various voltages and water flowrates. The experimental results show that the effective flowrate through one needle for reaching the PM2.5 collection efficiency of 95% and the power consumption per a needle are measured as 20 ccm and 0.35 W (35 kV and 0.01 mA). Comparing that the the ratio of water to flue gas and power consumptions of the previously commercialized wet electrostatic precipitators for the treatment capacity of 50 CMM have been reported as 1.0 L/m<SUP>3</SUP> and 840 kW, our measurement gave us 0.2 L/m<SUP>3</SUP> and 175 W, which are merely 20% and 20.8% over those of the commercialized one, respectively
Compound K, a Metabolite of Ginsenosides, Attenuates Collagen-induced Arthritis in Mice
( Yun Jong Lee ),( Kye Yong Song ),( Eun Young Lee ),( Heun Soo Kang ),( Yeong Wook Song ) 대한류마티스학회 2015 대한류마티스학회지 Vol.22 No.3
Objective. Although several ginsenosides have been reported to have anti-arthritic activity, few in vivo studies of the anti-arthritic effects of compound K (CK), a major metabolite of ginsenosides, have been conducted. Therefore, we investigated the preventative and therapeutic effects of CK on collagen-induced arthritis (CIA). Methods. CK was administered to CIA mice preventively and therapeutically and post-treatment bone microarchitectural characteristics, histopathological changes, and serum levels of anti-collagen antibodies, tumor necrosis factor-α, and interleukin (IL)-17 were investigated. We also examined cytokine production by type II collagen (CII)-stimulated splenocytes and mRNA expression of matrix metalloproteinases (MMPs), tissue inhibitors of metalloproteinase (TIMP)-1, receptor activator of nuclear factor-κB ligand (RANKL), and osteoprotegerin (OPG) in the joint tissues. Results. CK reduced the severity of CIA preventively and therapeutically (all p<0.05). Additionally, CK dose-dependently decreased histopathological signs of arthritis and improved microarchitectural characteristics (all p<0.05) at 10 to 20 mg/kg/d in CIA mice. CK treatment significantly decreased the serum levels of anti-CII immunoglobulin G (p<0.01) and the secretion of interferon-γ and IL-2 from stimulated splenocytes (all p<0.05). Furthermore, MMP-3/TIMP-1 and RANKL/OPG ratios were suppressed in CK treated mice (all p<0.01). Conclusion. CK attenuated CIA via suppression of the humoral immune response and modulation of joint-destructive mediators. These results suggest that CK has therapeutic potential in rheumatoid arthritis (J Rheum Dis 2015;22:154-166)
Osmic acid주입에 따른 가토 슬관절 내의 활액막 변화에 대한 연구
이종욱,전재명,이은우,송계용 중앙대학교 의과대학 의과학연구소 1990 中央醫大誌 Vol.15 No.1
The knowledge that pain and effusion in joint disease originate from the synovial membrane has led to the use of methods aimed at eliminating this synovium in various types of arthritis. Chemical synovectomy can delay or render unnecessary the need for surgery. Osmic acid (Os O_4) for this purpose was first used in 1951 by von Reis and Swensson. Since then, many studies were undertaken to evaluated the effects of osmic acid on the synovial membrane. But the synovial change and synovial regeneration has not been clearly clarified. It is the goal of this study to observe the sequential process of degeneration-regeneration of synovial membrane and to evaluate the pattern of deposition of the osmic acid on it. The author injected l.0ml of 1% osmic acid to 50 rabbit's knee separately. Then the synovial changes were observed grossly, light microscopically and transmission electron microscopically. The following results were obtained. 1. Grossly, the colour of the synovium turned dark brown one day after injection, and the degree of the discoloration became lighter with time. The synovium became thicker. There was edema around the joint through the whole period. 2. Microscopically, most synovium were necrotic at the early phase, but a few remaining synovial cells were observed electron microscopically. With time, the fibrosis was more progressed and the inflammatory reaction was slightly decreased. 3. At the second week, there were layers which were composed of the synovial like cells. The regeneration process was almost completed at the sixteenth weeks. 4. Osmic acid was deposited in the synovial tissue from the one day after injection. It was slightly diminished in the amount of osmic acid with time, but some osmic acid still observed at the end, of the experiment, 16 weeks. It has been postulated, based on the results of this experiment, chemical synovectomy using osmic acid can be used for temporary synovectomy effect lasting several months, but the residual hypertrophy of synovial and periarticular tissue could be a problem on joint mobility.
천태종(Tae Jong Chun),노성욱(Sung Wook Ro),서성준(Seong Jun Seo),송계용(Kye Yong Song),홍창권(Chang Kwun Hong),노병인(Byung In Ro) 대한피부과학회 1999 대한피부과학회지 Vol.37 No.9
We report a case of cutaneous B cell lymphoma in a 65-year-old male who had several bizarre shaped erythematous to brownish plaques on the both shins for 2 months. An abdominal CT scan revealed gastrohepatic ligament, retroperioneal, mesenteric and bilateral external iliac lymphadenopathies. Histologic examinations revealed diffuse dense infiltration of the large arypical cells with vesicular nucleus and prominent nucleoli in the entire dermis. They showed a positiver reaction to the LCA, CD20 and kappa light chain in the immunohistochemical study, suggesting that these neoplastic lymphoid cells are B cell linage. We treated hi, with COPBLAM-V regimen. In the course of treatment, new skin lesions developed on both upper arms and herpes zoster on the left thigh. So we changed the regimen into IMVP-16. No relapses have been found up to the present date for 9 months. (Korean J Dermatol 1999;37(9) : 1330∼1334)