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PWM 전력 컨버터를 이용한 배전용 무효전력 보상기 제어
고지호,김용현,김재홍,김일환 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1
This paper presents the control method of reactive power in distribution system using PWM power converter. The PWM power converter controlled by space vector PWM method is voltage source type using IGBT switching device. Using the Park's transformation, three phase load current can be written in terms of component α and β current in a synchronously rotating reference frame. Two axis. the direct axis. α. and the quadrature axis. β, mean the active and reactive component in load current. Also. two components appear as de quantities in that frame. So it is easy to control the reactive power by controlling the d axis currents. And in accordance with the change of reactive power in load side. PWM power converter compensate the reactive power by generating the reactive current to the load side using PI control. To verify the theoretical analysis. results of computer simulation and experiment are presented to support the discussion
고용석,강찬순,최보경,김혜수,홍정희,최명신,김상현,장성재,김길수 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-
Headspace-GC(딘5-GC)를 이용하여 ICH 잔류웅매 가이드라인 class 1, 2에 속하는 28종의 잔류유기웅매 분석방법을 연군한 결과 SPB-5, BB-WAX column을 동시 이용하여 각각을 확인, 정량할 수 있었다.또한 염의 참가효과, 평형시간,평형온도가 headspace분석에 미치는 영향을 검토한 결과 평형 시간 30분,평형온도 85℃,Na₂SO₄Ig을 첨가하여 시험할 때 최적 부넉조건을 나타내었다. 회수율은 1,1-achloroethene(68.3%)를 제외하고 90.9 ~ 114.5%로 패체적으로 양호하였다. 따로 HS-GCJECD, DB-524 column을 이용하여 9종의 잔류유기용매에 대하여 각각의 검랸선을 작성하고 검출한계를 구하였다. 실제 의약품 원료 10종및 제제 5종에 적용시킨 결과 모두 불검출되었으며 본 시험법은 의약품중의 잔류유기용매 분석에 적용할 수 있는 방법이라고 판단된다. The headspace-fC/FID(HS -GC/FID) method was performed for test method developnlent of residu;31 organic solvents in pfrarmaceuticals. Using SPB-S and BB-WAXcolumn, 28 kinds of solvents iri ICH residual sof)·ents guidetine class 1, 2 couBd be individuallt-identified and quantitated. The foIBowing residoal soIYents were not detected by the headspaceinjection condition : N,N-Cmethylacetamide, N,N-dimeth)rlformamide, ethyfeneglycol, formamide,2-methoryethanot, N-rnethylpyrrolidone, suBforane. The effects of the addition of salts,equilibration time, and equilibration temperature on headspace analt·sis were invesugated. Theoptimum conditions weiFe obtained with addtion of Ifa2s04 19 as a salt, simultaneously. thetime and temperature of equitibration were 30min and 8i'f, respectivety. The recovery havefound between 90.9 and 114.5% except 1,1-dichloroethene(fi8.3%). Using DB-624 column &HS-GC/:ECD method, 9 kinds of residual solvents could be individually identified andfuantitated. This HS-GC method can be applied to test the residua3 organic solvent in thepharmaceuticals.
리눅스를 이용한 로봇 제어용 실시간 운영 소프트웨어 설계
고낙용,노현창 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.1
This paper presents a method for designing a real-time operation software for autonomous mobile robot control systems. Operation softwares for most of mobile robots were developed for its o m use. Sometimes, the operation software was developed based on MS-DOS or real-time kernel However, US-DOS has many restrictions for use as a robot operation system. Though some of operation softwares are based on the real-time kernels of UNIX 01- Windows NT. they were inadequate for use with mobile robots. So, in this paper, we focus on building an operation software real-time kernel based on Linux. The software modules of Task Management, Memory Management, Intertask Communication, and Synchronization are redesigned using POSIX/ANSI-C Library to make the kernel compatible with Linux standard platform. To show the efficiency of the paper, it was applied to run Nomad Super Scout II avoiding obstacles detected by sonar sensor array.
신경인성 과반사성 배뇨근에 대한 배뇨근 내보툴리눔 독소 A 주사
고현윤,신용범,손현주,장재혁,이경미,문혜정,하용훈 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.23
Local injections of botulinum toxin A have been reported in the treatment of neurogenic bladder dysfunctions including detrusor sphincter dyssynergia and detrusor overactivity. We reports a case of intradetrusor injection of botulinum toxin type A in acervical cord injured patient with neurogenic overactive detrusor refractory to high dose anticholinergic medication. Botulinum toxin A (200 units) was injected cystoscopically into the detrusor in 40 sites over the bladder with sparing the trigone. Urodynamic studies were performed at baseline, and eight days, four weeks, and eight weeks after intradetrusor injection. There was marked improvement of the urodynamic parameters including maximum cystometric capacity and maximum detrusor pressure after intradetrusor botulinum toxin injection.
PWM 전력 컨버터를 이용한 배전용 무효전력 보상기 제어
고지호,김용현,김재홍,김일환 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.1
This paper presents the control method of reactive power in distribution system using PWM power converter. The PWM power converter controlled by space vector PWM method is voltage source type using IGBT switching device. Using the Park's transformation, three phase load current can be written in terms of component α and β current in a synchronously rotating reference frame. Two axis, the direct axis, α, and the quadrature axis, β, mean the active and reactive component in load current. Also, two components appear as dc quantities in that frame. So it is easy to control the reactive power by controlling the d axis currents. And in accordance with the change of reactive power in load side, PWM power converter compensate the reactive power by generating the reactive current to the load side using PI control. To verify the theoretical analysis, results of computer simulation and experiment are presented to support the discussion
고용구,김성홍,오창경,오명철,김수현 濟州大學校 産業技術硏究所 1995 산업기술연구소논문집 Vol.6 No.-
Twelve residual pesticides which applied on the fruits and vegetables cultivation were tested for mutagenic activity using Salmonella typhimurium TA strain. Mutagenic activities against Tedion, Monopho, Danoton, Ometon and Captan of twelve pesticides tested were strong, Thalonil, Prosing, EPN, Phentoate, Dicopol and Captan were medium, and Dicopol were no. Tedion, hlonopho and Danoton showed strong mutagenic activities on TA98, Thalonil, Prosing, EPN, Phentoate, Parathion and Sappiran showed medium, and Danoton showed weak, while Dicopol and Sappiran showed no. At the other hand, Tedion, Danoton, Ometon and Captan showed storng mutagenic acitivities on TA100, Thalonil and Monopho showed medium and Prosing, Phentoate, Parathion and Sappiran showed weak, while EPN and Dicopol showed no. Therefore, EPN identified mutagen which induced only frameshift mutation, Sappiran was only base-substitution, and nine except these and Dicopol of twelve pesticides tested were mutagens which induced both frameshift and base-substitution mutation.