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Development of Fault Location Algorithm and Its Verification Experiments for HVDC Submarine Cables
Chae-Kyun Jung,Hung-Sok Park,Ji-Won Kang,Xinheng Wang,Yong-Kab Kim,Jong-Beom Lee 대한전기학회 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
A new fault location algorithm based on stationary wavelet transform and its verification experiment results are described for HVDC submarine cables in this paper. For wavelet based fault location algorithm, firstly, 4th level approximation coefficients decomposed by wavelet transform function are superimposed by correlation, then the distance to the fault point is calculated by time delay between the first incident signal and the second reflected signal. For the verification of this algorithm, the real experiments based on various fault conditions and return types of fault current are performed at HVDC submarine cable test yard located in KEPCO(Korea Electric Power Corporation) Power Testing Center of South Korea. It proves that the fault location method proposed in this paper is very simple but very quick and accurate for HVDC submarine cable fault location.
등줄쥐(Apodemus agrarius Pallsa)에 있어서 α-amylase의 특성연구(Ⅱ) : 당뇨 모델동물로서 등줄쥐의 유용성
채갑용,임철주,김용규,김철규,장인석,황진희,황대연,조성화,이은,조정식 식품의약품안전청 1997 식품의약품안전청 연보 Vol.1 No.-
등줄쥐를 실험동물로서 유풍성을 증진하고 당뇨 모델동물간의 생리적 발칠 특성을 연구하기 위하여 비만 감수성 동물에 특이적으로 비만을 유발하는 사료 모델인 고지방사료(34% 지방에너지/총에너지)를 등줄쥐 및 당뇨 모델동물(KK 마우스와 chinese hamster)에 급여하여 당뇨 및 비만의생리적 특성을 연구하였다. 각 동물은 4-6주령의 수컷 24마리, 총 72마리를 10준간 급여하였다. 이들의 결과 빅만 감꼭성 모질사료인 고찌방사료 급여에 의하예 딘K마 우스는 고혈당,혈중 지질함량 및 leptin이 현저한 증가가 나타나인간의 비만형 당뇨모델동물로서 고지방에 민감한 반응을 나타내고 있는 반면에 IDDM이 다발하는 chinese hamster에서는 영향을 나타나지 않는 것으로 나타났고 등줄쥐는 KK마우스 및 chinese hamster에 비하여 혈중 중성지질 및 cholesterol 함량이 현저히 낮고 고지방 사료에는 민감한 반응을 나타내지 깥아 지방대사에는 현저한 항상성은 있으나 혈당 및 혈중 인슬린 함량이 높은 당뇨모질동물로서 가능성을 시사하고 있다. The levels of enzyme activity (o-amylase), metabolite (serum glucose, cholesterol, triglyceride) and peptide hormones (insulin, leptin) were exarBined fn striped field mice and the diabetesmodel animals fed moderatelr high fat diet for 10 weeks. Four-six weeks old of male animal in stripedfield mice, KK mice and chinese hamsters were used in this experimrnt and fed pelleted diet containiBgmoderately high fat diet wifh 34% of energy supplied as fat. At the ending 70 days of feeding, blood wasquickly collected from hea3f puncture and parotid gland, pancreas, liver and kidneys were removed.Serum were prepared for engfme activity, metabolite and peptide hot·none levels. As a result of experi-meBt, a moderately high fElt diet gave rise to significant increase in blood glucose, lipid and leptin i8KK mice, kRown as a mode:1 animal for human diabetes(non- insulin dependent diabetes Taellitvs). How-ever, a high fat diet did not induce a sigBifincantly change in chinese hamsters knoweB as a insulin de-Thus, strired field mice indicated a potentially useful aBiinal model for diabetes to studf of mechanismunderlying in development of diabetes.
최용훈(Yong-Hoon Choi),윤상현(Sang-Hyeon Yoon),남혜선(Hye-Seon Nam),홍혜미(Hye-Mi Hong),이진하(Jin-Ha Lee),채갑용(Kab-Ryong Chae),이종옥(Jong-Ok Lee),김희연(Hee-Yun Kim) 한국농약과학회 2005 농약과학회지 Vol.9 No.4
Condition of Ion-Trap gas chromatography-mass spectrometry (GC-MS) for rapid screening of 206-pesticides residues in agricultural foodstuffs was optimized. As applying a wide-bore column (10 m X 0.53 ㎜, DF 0.25 ㎛) connected with a fused silica restrictor (0.6 m X 0.1 ㎜), a significant retention time reduction was obtained. Additionally, the shape of peaks was sharper and higher than classical GC's and GC-MS's, which allowed lower detection limits. To easily manage many spectral data, both of Electron Ionization(EI) and Chemical Ionization(CI) techniques were adopted in screening procedure. At the following steps, MS-MS technique were used to confirm screened analytes in complicated matrices.
등줄쥐(Apodemus agrarius Pallas), KK 마우스 및 Chinese Hamster에 있어서 고지방사료 급여의 영향
채갑용(Kab-Ryong Chae),김용규(Yong-Kyu Kim),강태석(Tae-Surk Kang),김철규(Chuel-Kyu Kim),장인석(In-Surk Jang),황진희(Jin-Hee Hwang),황대연(Tae-Yeon Hwang),임철주(Chul-Joo Lim),이은(Euen Li),조정식(Jung-Sik Cho) 한국실험동물학회 1999 Laboratory Animal Research Vol.15 No.1
Development of Fault Location Algorithm and Its Verification Experiments for HVDC Submarine Cables
Jung, Chae-Kyun,Park, Hung-Sok,Kang, Ji-Won,Wang, Xinheng,Kim, Yong-Kab,Lee, Jong-Beom The Korean Institute of Electrical Engineers 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
A new fault location algorithm based on stationary wavelet transform and its verification experiment results are described for HVDC submarine cables in this paper. For wavelet based fault location algorithm, firstly, 4th level approximation coefficients decomposed by wavelet transform function are superimposed by correlation, then the distance to the fault point is calculated by time delay between the first incident signal and the second reflected signal. For the verification of this algorithm, the real experiments based on various fault conditions and return types of fault current are performed at HVDC submarine cable test yard located in KEPCO(Korea Electric Power Corporation) Power Testing Center of South Korea. It proves that the fault location method proposed in this paper is very simple but very quick and accurate for HVDC submarine cable fault location.