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태양광발전시스템의 효율적 운영을 위한 모니터링 프로그램 구현
윤창대(Chang-Dae Yoon),문현호(Hyun-Ho Moon),서종완(Jong-Wan Seo),서희석(Hui-Suk Suh),신명철(Myong-Chul Shin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.11
현재 전력계통분야에서 신재생에너지원을 이용한 분산전원 (DG, Distributed Generation)이 확대 보급됨에 따라 이에 대한 기술의 높은 신뢰성 및 경제성이 높아지고 있는 시점이다. 이에 따라 분산전원의 효율 적운용을 위한 모니터링 장치의 필요성이 또한 증대되고 있다. 본 논문에서는 신재생에너지원 중 대표적인 태양광발전시스템의 현재 상태 (전압, 전류, 전력, 위상, 주파수)를 계동의 모니터링을 위해 제작한 ATmega 128 (AVR)이 내장된 Power Line Data Acquisition Board와 현재 널리 통용되는 GUI시스템인 LabVIEW를 이용하여 컴퓨터를 통한 태양광발전시스템을 모니터링 하는 프로그램을 구현하고자 한다.
제주지방 돼지의 폐병변으로부터 Pasteurella multocida 분리 및 생화학적 특성
김옥녀 ( Ok Nyeo Kim ),이두식 ( Du Sik Lee ),문호규 ( Ho Kyou Moon ),김우택 ( Woo Taek Kim ),서문현 ( Moon Hyun Seo ),배종희 ( Jong Hee Bae ),임윤규 ( Yoon Kyu Lim ),조길재 ( Gil Jae Cho ) 한국동물위생학회 1995 한국동물위생학회지 (KOJVS) Vol.18 No.2
The present study was conducted to investigate the incidence of Pasteurella multocida infection in cheju swine from March 1994 to December 1994 isolated organisms were identified by the biochemical properties, cellulose serological type and antibiotic susceptibilities. Pasteurella multocida was isolated from the Lungs of 96 pigs with pneumonia(51%) among 188 slaughtered pigs. The majority of p multocida isolates were identical to those of the standard strains. On the classification of the capsular type of the isolated p multocida it consist of the 88 isolates of type A(91.6%) 2 isolates of type D (2%) and un classified 6 types(6.2%). The majority of the 96 isolates of p multocida highly susceptible to the antibiotics including ampicillin(Am), cephalotin(Ce), erythromycin(Em), gentamycin (Gm), kanamycin (Km), lincomycin (Lm), neomycin (Nm), penicillin(Pc), streptomycin(Sm), sulfametoxazol/trimethoprim(Sxt) and tetracycline (Te)
문현욱,최희태,서강수,신용진 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-
In this paper, we mention he fabrication of Sr ferrite plastic magnet. In order to compose Sr ferrite, first, a little CaO, SiO₂, Na₂SiO₃, and Al₂O₃ are added to SrO5.9Fe₂O₃. Then, the composition is calcinated at 1225℃ under N₂ enviroment for 1 hourwith addition of PVA 5wt% solution. The carbon coating method increase grinding effect on powder fabrication. To fabricate anisotropic Sr ferrite plastic magnet, 80-89wt% of Sr ferrite and polyamide6 are kneaded and then 0-12kOe of magnetic field is applied. On magnet fabrication, an optimal condition of injection mold is obtained under the injection temperature 270℃, the injection pressure 120㎏/㎠, the magnetic field 8kOe and magnetic field applied time 8sec. As the result of experiments, we obtain (BH)max = 2.09MGOe property on anisotropic plastic magnet which is fabricated by using injection mold method in magnetic field.
임재근,서강수,문현욱,신용진 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-
This thesis is the study on the magnetic properties of strontium (Sr) ferrite. Specimens of SrO·nFe₂O₃,basic composition, with n=5.9 which is nonstoichiomatric composition region were prepared by sintering at 1275°C for 1hr, whthin air surroundings. In order to increase coercivity, additives of 0.4wt%SiO₂ and 0.7wt%CaCO₃ were added into basic composition, and 0.5wt%∼2.0wt%Cr₂O₃ was added as second additives. In case of second additives 1.5wt%Cr₂O₃, it was obtained uniformed grain size and magnetic properties was increased. The sintering temperature was 1150°C, 1180°C, 1210°C, 1240°C and 1270°C respectivily and cooling was performed in furnance. From the research and experiments on the magnetic properties of strontium (Sr) ferrite based on the complex additive technique, it was obtained good magnetic properties of (BH)mas=0.72MGOe, at the sintering temperature of 1210°C, in the case of (basic composition)+(basic additive)+(1.5wt%Cr₂O₃)
SrO·nFe₂O₃의 磁氣特性에 미치는 La₂O₃의 影響
오응철,서강수,문현욱,신용진 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-
This paper is studies the addition effects of La₂O₃ on the magnetic properties of Sr·ferrite The calcination temperature was 1250℃ for 1hr in air, and sintering temperature has been made at the temperature of 1225℃, 1250℃, 1275℃ and 13O0℃ respectively for 0.5hr. Compositions were chosen according to the formula ?? where n was varied between 5.8∼6.1 and x was varied between 0∼3 The composition of the best value ??= 1.48MG0e was n = 6(stoichiometric composition) and x = 2 at La₂0₃ addition. This value was higher than that of ordinary isotropic strontium ferrite.
Co-계비정질 리본의 자기특성에 미치는 열처리 효과에 관한 연구
조치현,신용진,문현욱,서강수 明知大學校 産業技術硏究所 1993 産業技術硏究所論文集 Vol.12 No.-
This thesis describes the effect of annealing on the magnetic properties of Co-bsaed amorphous. The basic composition of the chosen samples were Co82Si2B15 of zero magnetostriction. The sample was melted in the quartz tube with 0.5[mm∮) nozzle. and the single roll technique was used to make a amorphous ribbon, under Ar-gas pressure 0.6〔kg/cm2] and ro11 speed 28[m/sec]. The average width and thickness of sample ribbons 2.4[mm] and 45(㎛). The sample ribbons were annealed to improve the magnetic properties at temperature of 325,350,375,400 and 450℃ respectively, for 15,30,45,60 and 120 [min] at each temperature. And I have measured high per meability of 8,000∼ 13,000 through the annealed amorphous ribbons. Especially, when the amorhpous samples were annealed at 325 for 45min, the permeability of the ribbon was 13,589. Consequently. I had effects of the improvment of permeability and the average loss at the low-frequency region.