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( Hyo Jeong Chang ),( Dong Hyun Sinn ),( Sung Gyun Cho ),( Tae Hoon Oh ),( Tae Joo Jeon ),( Won Chang Shin ),( Won Choong Choi ) 대한간학회 2014 Clinical and Molecular Hepatology(대한간학회지) Vol.20 No.2
Pure red cell aplasia (PRCA) and autoimmune hemolytic anemia (AIHA) have rarely been reported as an extrahepatic manifestation of acute hepatitis A (AHA). We report herein a case of AHA complicated by both PRCA and AIHA. A 49-yearold female with a diagnosis of AHA presented with severe anemia (hemoglobin level, 6.9 g/dL) during her clinical course. A diagnostic workup revealed AIHA and PRCA as the cause of the anemia. The patient was treated with an initial transfusion and corticosteroid therapy. Her anemia and liver function test were completely recovered by 9 months after the initial presentation. We review the clinical features and therapeutic strategies for this rare case of extrahepatic manifestation of AHA. (Clin Mol Hepatol 2014;20:204-207)
( Joo Han Park ),( Hyo Jung Lee ),( Sei Rhan Kim ),( Ga Won Song ),( Seung Kyong Lee ),( Sun Young Park ),( Ki Chan Kim ),( Sun Hyuk Hwang ),( Joon Seong Park ) 대한내과학회 2014 The Korean Journal of Internal Medicine Vol.29 No.5
Background/Aims: The treatment for steroid-refractory acute graft versus host disease(GVHD) after allogeneic stem cell transplantation (allo-SCT) needs to be standardized. We report our clinical experience with etanercept for steroid-refractoryacute GVHD. Methods: Eighteen patients who underwent allo-SCT and presented with steroid-refractory acute GVHD at Ajou University Hospital were studied retrospectively. They were given 25 mg of etanercept subcutaneously twice weekly for 4weeks. The clinical responses were evaluated with regard to the severity of acuteGVHD. Results: The median patient age was 43.5 years. Using nonparametric tests, etanercepthad a down-grading effect on acute GVHD (p = 0.005), although no patient experiencedcomplete remission. Partial responses were seen in 80%, 17%, and 57% ofgrade II to IV patients, respectively. Skin and gut GVHD were well controlled withetanercept, whereas hepatic GVHD was not. Four patients died of fatal infections. No factors affecting the clinical outcome of etanercept were identified. Conclusions: Etanercept has a modest effect on steroid-refractory acute GVHD afterallo-SCT, with tolerable side effects.
Hyo-Jin Nam,SeongSoo Jang,Young-Sik Kim,Caroline Sunyong Lee,Won-Hyeog Jin,Il-Joo Cho,Jong-Uk Bu 대한전자공학회 2005 Journal of semiconductor technology and science Vol.5 No.1
Silicon nitride cantilevers integrated with silicon heaters and piezoelectric sensors were developed for the scanning probe microscope (SPM) based data storage application. These nitride cantilevers are expected to have better mechanical stability and uniformity of initial bending than the previously developed silicon cantilevers. Data bits of 40 nm in diameter were recorded on PMMA film and the sensitivity of the piezoelectric sensor was 0.615 fC/nm, meaning that indentations less than 20 nm in depth can be detected. For high speed operation, 128×128 cantilever array was developed.
Novel Phase Advance Method of a BLDC Motor for Wide Range Speed Operations
Won Lee,Jong-Joo Moon,Min-Hyo Lee,Jang-Mok Kim 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.9
This paper proposed a novel phase advance method for brushless DC motors (BLDCMs) to extend the speed operating range, and obtain the maximum torque in the high speed operation region. The angle of the phase currents should be advanced about the back-EMF to increase the speed operating region and obtain maximum torque. Many advance methods have been studied for BLDCMspeed expansion. The conventional method could widen the speed range, but also increase the torque ripple. To resolve the issues with conventional methods, the proposed method broadens the conductive angle of the phase current including advancing the phase current angle to the back-EMF (Electro-Magnetic Force). The broad conductive angle is derived by analyzing the phase current and back-EMF. The usefulness of the proposed method is verified through mathematical analysis, computer simulation and experimental results.