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허지혜,김형욱,김영대,이영호,김남수,설인준,김상우 인제대학교 2006 仁濟醫學 Vol.27 No.-
Objective : We analyzed and investigated clinical manifestations, laboratory tests, and inhibitor development of hemophilia that had not been thoroughly studied. Methods : We retrospectively reviewed 96 patients with hemophilia who were registered in the Hanyang University hospital from Jan, 1984 to Dec, 2003, Results : The total patients, whose median age at onset was 46.0 months, in clude 84 cases of type A (87.5%) and 12 cases of type B (12.5%). The most common chief complaint was a traumatic hemorrhage. The family histories of hemophilia were revealed in 41 cases (42.7%). The median activated partial thromboplastin time (aPTT) was 66.7 seconds. The number of severe cases was 39 (40.6%). Inhibitors were present in 13 cases (13.5%) and seven cases (53.8%) were high responders. aPTT and factor levels showed reverse correlation (r=-0.467). aPTT is more prolonged in group without family history than the group with family history (P=0.037). Conclusion : In this study, the diagnosis of hemophilia are made at the lower age and the serological positivity of the HCV is decreased. Activated partial thromboplastin time and factor levels shows reverse correlation. Activated partial thromboplastin time is more prolonged in group without family history compared with group with family history. The frequencies of family history are lower than those of other developed countries, because of concealing the family history of hemophilia. The prevalence of the development of inhibitors increased compared with those of previous studies in Korea, but was lower than those of other countries. Further studies would be necessary to decrease the inhibitor development.
김욱,윤진상,이형영 大韓神經精神醫學會 1991 신경정신의학 Vol.30 No.6
This study was carried out in order to find out the possible relationships between sleep patterns and psychological characteristics. The subjects were 160 young normal students, 114 men and 46 women, aged 21∼25 years(21.64±1.31). Four aspects of sleep patterns(length, regularity, circardian rhythm and refreshed feeling at the time of awakening) were investigated, based on the sleep questionnaire, a sleep diary of two weeks and a Korean version of the morningness-eveningness questionnaire of Horne and Ostberg(1976). The subjects belonging to the two extreme groups of each aspect of sleep patterns(long vs. short, regular vs. irregular, morning vs. evening, refreshing vs. nonrefreshing) were compaired using the Korean version of MMPI(1989). The results were as follows : 1) With each sleep pattern, the long sleepers were 23(14.38%), short sleepers 16(10.00%) ; regular sleepers 105(65.63%), irreqular sleepers 19(11.88%) ; morning type sleepers 176(10.63%), evening type sleepers 17(10.63%); refreshing sleep 45(28.12%), nonrefreshing sleep group 27(16.87%). 2) There was no significant difference between the long- and short-term sleeping groups. 3) The irreqular sleeping group showed significantly higher scores than the reqular sleeping group in Hs(p<.01), Pd(p<.05), and Scsubscales(p<.05). 4) The evening sleeping groups showed significantly higher scores than the morning sleeping group in F(p<.05) and Hs subscales(p<.01). 5) The nonrefreshing sleep showed significantly higher scores than the refreshing sleep group in Hs(p<.001), D(p<.01), Hy(p<.001), and Pt subscales(p<.001).
베이스 구조물 진동을 고려한 스테이지 입력성형기법 적용에 관한 연구
김형기,권오영,배규현,홍성욱 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
A base structure which mounts positioning stages is often subjected to vibration due to the reaction force against the stage motions. This paper deals with an input shaping method for positioning stage in consideration of vibration base structures along with the stage vibration. A dynamic model is established to investigate the vibration of positioning stage and base structure. Two input shapers, a conventional input shaper and a new input shaper, are applied to eliminate both the residual vibrations in base structure as well as positioning stage. Simulations show that the input shaping methods effectively remove the residual vibrations.