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김영학,김 혁 한양대학교 의과대학 2002 한양의대 학술지 Vol.22 No.1
Cardiac disease contines to be a major cause of death in patients undergoing long-term hemodialysis. In year 1999, 3 patients with end-stage renal disease dependent on maintenance hemodialysis underwent cardiac operation. Two had Aortic valve replacement, One had coronary bypass operation. All patients were dialyzed within 12 hours before operation and were managed by Hemofiltration during cardiopulmonary bypass. The hemodialysis could be initiated in 2nd postoperarive day. There was no postoperatife death but one complication consisted of a postoperative bleeding from proximal anastomosis site of the saphenous vein graft. One patient underwent subsequent successful renal transplantation. Cardiac operation is considered to be performed safely in patient with end-stage renal failure. Furthermore, improvement of cardiac disability will simplify continued management of the patient needing dialysis and provide a chance of succesful renal transplantation.
Flash D 탈자방법에서 수직자화예측을 위한 초기자화율에 관한 검토
김영학,도재원,Kim, Young-Hak,Doh, Jaewon 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.5
A permanent vertical magnetization should be obtained to counteract induced vertical magnetization due to the earth's background field during the Flash D demagnetization process. A vertical susceptibility is needed to calculate a extra-permanent magnetization, which is needed to control the permanent vertical magnetization in stage 2 of Flash D demagnetization and added to the final vertical permanent magnetization. Two susceptibilities were found in this paper. One is obtained from the extra-magnetization. The other is obtained by magnetic field measurement from the scaled physical vessel when the vessel is excited by vertical magnetic field. The initial susceptibility by the extra-magnetization was 0.101~0.109 and the one from the measured magnetic field was 0.122. Two susceptibilities have a good agreement each other. From this paper, it is found that the susceptibility is able to appllied to calculate the extr-magnetization.