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최장발성폐기능저하를 동반한 일측성 성대마비 환자에서의 S/Z Ratio와 최장 발성시간(Maximum Phonation Time)의 유용성 비교
박준표,정고은,강병철,김성태,남순열,김상윤,노종렬,최승호,Park, Joon Pyo,Jeong, Go-Eun,Kang, Byung Chul,Kim, Seong-Tae,Nam, Soon Yuhl,Kim, Sang-Yoon,Roh, Jong-Lyel,Choi, Seung-Ho 대한후두음성언어의학회 2012 대한후두음성언어의학회지 Vol.23 No.2
Background and Objectives : MPT is directly related to degree of glottal closure. So it is widely used in the assessment of glottal closure with unilateral vocal fold paralysis. But MPT could be influenced not only by glottal closure but also by pulmonary function. So MPT might not reflect glottal closure in UVFP with decreased pulmonary function. The purpose of the study is to evaluate usefulness of MPT and ratio of /s/ time to /z/ time before and after injection laryngoplasty in UVCP with decreased pulmonary function. Materials and Methods : This study involved 34 patients with unilateral vocal fold paralysis : with decreased pulmonary function in group A (n=15) : with normal pulmonary function in group B (n=19). All patients underwent injection laryngoplasty. Paramters of perceptual analysis, acoustic analysis, aerodynamic analysis, videostroboscopy were compared between two groups. Results : Breathness and asthenic scale, G scale of perceptual analysis were significantly improved in both groups. Glottal gap index were significantly decreased after injection in both groups. In aerodynamic analysis, MPT was improved after injection laryngoplasty in both groups, but S/Z ratio was improved only in group B. In correlation analysis, /s/ time was not correlated with pulmonary function. Conclusion : S/Z ratio reflects neither the pulmonary function nor the glottal clousure properly. MPT is more useful indicator than S/Z ratio to evaluate vocal fold paralysis even with decreased pulmonary function.
전자기력을 이용한 알루미늄 스크랩 중의 Fe 제거에 관한 연구 : ( Part 2. Al-Si-Cu 계 합금 스크랩에서 전자기력에 따른 Fe 계 금속간화합물의 이동양상 )
김정호,노정훈,박준표,윤의박 ( Jeong Ho Kim,Jeong Hoon Noh,Joon Pyo Park,Eui Pak Yoon ) 한국주조공학회 1998 한국주조공학회지 Vol.18 No.3
N/A In the view point of the environmental conservation and the energy reduction, the recycling of metal scrap is coming as one of the global subjects in the world. In this study, the movement of intermetallics with electromagnetic force in a melt of a scrap of AI-Si-Cu alloy (JIS ADC12), which was widely used in diecasting process, was investigated in order to eliminate the Fe element, which was usually accumulated in a scrap. In this study, we applied electromagnetic method to eliminate Fe element in ADC12 aluminum alloy scrap which contains 1.64wt.% Fe and the effects of electromagnetic force on the particle movement was visualized and confirmed by water modeling and experiment. As a result, the Fe intermetallic compounds are moved to the direction opposite to that of the electromagnetic force as the force applies, thus eliminated from the bulk metal. Therefore, the content of Fe in matrix decreased from 1.64wt.% to 0.45wt.%. (Received February 20, 1998)