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Angular dependence of critical current of SmBCO coated conductor fabricated by co-evaporation method
Ho-Sup Kim,Hong-Soo Ha,Sang-Soo Oh,Kyu-Jeong Song,Rock-Kil Ko,Dong-Woo Ha,Tae-Hyung Kim,Do-Jun Youm,Nam-Jin Lee,Seung-Hyun Moon,Sang Im Yoo,Chan Park 한국초전도저온학회 (구 한국초전도저온공학회) 2008 한국초전도저온공학회논문지 Vol.10 No.2
Angular dependence of critical current of SmBCO coated conductor fabricated by co-evaporation method
Kim, Ho-Sup,Ha, Hong-Soo,Oh, Sang-Soo,Song, Kyu-Jeong,Ko, Rock-Kil,Ha, Dong-Woo,Kim, Tae-Hyung,Youm, Do-Jun,Lee, Nam-Jin,Moon, Seung-Hyun,Yoo, Sang-Im,Park, Chan The Korean Society of Superconductivity and Cryoge 2008 한국초전도저온공학회논문지 Vol.10 No.2
Angular dependence of critical current density of SmBCO coated conductor fabricated by co-evaporation method was investigated. For comparison, three samples were fabricated by a co-evaporation method and one sample was fabricated by a pulsed laser deposition process. The deposition system, named EDDC (Evaporation using Drum in Dual Chambers), is a batch type co-evaporation system, which is composed of reaction chamber and evaporation chamber. The normalized critical current density ratio ($I_c/I_c$(H//ab-plane)) of EDDC-SmBCO samples was found to be higher than that of PLD-YBCO sample in the whole range of angle. While the EDDC-SmBCO samples evidently had a peak at the angle of H//c-axis in the plot of the angular dependence of critical current, the normalized critical current of PLD-YBCO sample decreased monotonically without any peak as angle increased. The field dependence of critical current under the magnetic field parallel to the normal direction of those samples showed similar aspect in the range of $0\;G{\sim}5000\;G$.
구훈섭 ( Hoon Sup Koo ),허규찬 ( Kyu Chan Huh ),김선문 ( Sun Moon Kim ),이기세 ( Gi Sei Lee ),이태희 ( Tae Hee Lee ),임의혁 ( Euyi Hyeog Im ),최용우 ( Young Woo Choi ),강영우 ( Young Woo Kang ) 대한소화기기능성질환·운동학회 2004 Journal of Neurogastroenterology and Motility (JNM Vol.10 No.1
Diffuse esophageal spasm (DES) is a motility disorder of the esophagus characterized by simultaneous non-peristaltic contractions with high amplitude and long duration accompanied by chest pain and dysphagia. There are various hypotheses of the mechanism leading to the development of DES. DES has been classified into reflux associated DES (RDES) caused by acid exposure, and idiopathic DES (IDES) of unknown cause. Treatment is specific to the subtype. IDES is traditionally treated by smooth muscle relaxant, calcium channel blocker, etc. RDES symptoms can be reduced by H2 blockers and proton pump inhibitors (PPI). We recently assessed a 45-year-old female patient with known bronchial asthma and reflux esophagitis who complained of chest pain and recent onset dysphagia. She had reflux esophagitis on UGI endoscopy and DES on esophageal manometry. She was diagnosed as having DES following reflux esophagitis. Dysphagic symptoms were relieved by PPI. We report a case of DES following reflux esophagitis and provide a review of the literature. (Kor J Neur ogastr oenter ol Motil 2004;10:81-85)
A Study on the Bias Reduction in Split Variable Selection in CART
Song, Hyo-Im,Song, Eun-Tae,Song, Moon Sup 한국통계학회 2004 Communications for statistical applications and me Vol.11 No.3
In this short communication we discuss the bias problems of CART in split variable selection and suggest a method to reduce the variable selection bias. Penalties proportional to the number of categories or distinct values are applied to the splitting criteria of CART. The results of empirical comparisons show that the proposed modification of CART reduces the bias in variable selection.
수양성 설사 없이 비전형적 증상으로 발현된 위막성 대장염 1예
구훈섭 ( Hoon Sup Koo ),허규찬 ( Kyu Chan Huh ),정승현 ( Seung Hyun Jeong ),김용문 ( Young Moon Kim ),김선문 ( Sun Moon Kim ),이태희 ( Tae Hee Lee ),임의혁 ( Euyi Hyeog Im ),최용우 ( Young Woo Choi ),강영우 ( Young Woo Kang ) 대한장연구학회 2005 Intestinal Research Vol.3 No.1
In recent days, it is not uncommon to see the occurrence of pseudomembranous colitis which is caused by the use of antibiotics. The symptoms of pseudomembranous colitis vary from asymptomatic to fulminant toxic colitis. However, its typical symptom is watery diarrhea followed by abdominal pain, fever, and hypoalbuminemia. Abdominal distension by ascites without watery diarrhea has been rarely reported in the course of antibiotics-induced pseudomembranous colitis. We experienced a 70-year-old patient who presented with the symptoms of abdominal distension by ascites, abdominal discomfort and pitting edema of lower leg after antibiotic treatment for pneumonia. Because of high level of CEA in both ascites and serum, we suspected hidden malignancy. Special studies including CT scan were done, but we failed to find any malignancies. The patient was diagnosed with pseudomembranous colitis after colonoscopy and tissue biopsy. All symptoms disappeared and the CEA value returned to normal after conservative therapy and oral metronidazole treatment. (Intest Res 2005;3:80-84)