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김철웅(Cheol-Woong Kim),박천웅(Cheon-Woong Park),신용훈(Yong-Hoon Shin),서해용(Hae-Young Seo),이호상(Ho-Sang Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The development of new material systems like Carbon Fiber Reinforced Polymer (CFRP) places ever higher demands on the techniques for non-destructive material characterisation. Image-producing eddy current methods also need to satisfy these demands. Eddy-current imaging of FRP is based on the anisotropic electrical properties of the material investigated. Significant differences in conductivity between carbon fibres, polymer matrix and integrated functional components can be found. The availability of high-resolution sensors enables access to the local distribution of the electromagnetic properties. The static and dynamic procedures for isolating influential characteristics, already in use in eddy-current technology, can now be supplemented by topographical images. The precondition for a successful implementation of the eddy-current procedure is a deeper understanding of the image-generating process which allows correct interpretation of the images obtained.
ABO 부적합 신장 이식 후 발생한 가역적 후백질 뇌병증 증후군 1예
김종인 ( Jong In Kim ),최안숙 ( An Sook Choi ),김수진 ( Su Jin Kim ),지병훈 ( Byoung Hoon Ji ),오준석 ( Joon Seok Oh ),손영기 ( Young Ki Son ),신용훈 ( Yong Hun Shin ),김중경 ( Joong Kyung Kim ) 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.2
Reversible posterior leukoencepalopathy syndrome (RPLS) was noted by a reversible syndrome of headache, altered mental status, seizure, and visual loss associated with findings indicating predominantly posterior leukoencephalopathy on imaging studies. We report a successful treatment of RPLS after secondary ABO incompatibility kidney transplantation with blood pressure control. A 41-year-old female whose primary kidney disease was chronic glomerulonephritis had graft failure developed after living donor kidney transplantation (1st kidney transplantation). She was admitted to our hospital for 2nd ABO incompatibility kidney transplantation. She had undergone 6 times of plasmapheresis and received additional two doses of rituximab (375mg/m2) and intravenous immunoglobulin (0.5g/kg) before kidney transplantation. She received basiliximab induction therapy, tacrolimus, steroid and mycophenolate mofetile after transplantation. The ABO antibody titer had been low (below 1:1) and evidences of rejection were not detected. Generalized tonic clonic type seizure, eyeball deviation, facial cyanotic change and loss of consciousness occurred at post operation 7th day. Several minutes later, she recovered her consciousness without disability and neurologic deficit. She did not represent attacks any more after we controlled blood pressure without withdrawal of immunosuppressants or dose reduction.
성제중,서동만,신용훈,엄태건,서동섭 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1
Ferromagnetic material like the steel tubes can easily distort eddy current testing signal due to increased magnetic permeability for defects. Because magnetic field of the test probe is affected in an inconsistent way when the material under the testing has permeability. This permeability effect can be reduced by magnetic saturation. In this paper eddy current testing system was developed to detect flaws on the steel tubes. Magnetic saturation probe with helmholtz coil was designed for saturation and inspection of the steel tubes. When using the designed test probe, the relationship between flaw signals and noises was obviously discriminated. Additionally, a high pass filter was included in the eddy current board to minimize noises due to DC magnetic field.