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만성 골수성 백혈병에서 골수 Hemosiderin 의 의의
하승우(Sung Woo Ha),손상균(Sang Kyun Shon),김광원(Gwang Weon Kim),이규보(Kyu Bo Lee),황기석(Kee Suk Whang) 대한내과학회 1989 대한내과학회지 Vol.37 No.2
N/A We studied the relationship among the level of bone marrow hemosiderin, clinicohematologic findings and ferrokinetics. The subjects were patients taken from 30 cases who had been diagnosed as chronic granulocytic leukemia at Kyungpook National University Hospital from January 1980 through July 1988. Among these 30 cases 22 cases (73.3%) had a de- creased level of bone marrow hemosiderin. One case(3.3%)had an increased level of bone marrow hemosiderin while 7 eases(23.3%)were normal. In all cases, the level of serum ferritin was likely to be decreased but it was within the normal range. The 7 eases (22.3%)had an increased level of serum ferritin and 23 cases(77.7%)had a normal level. The level of serum iron was increased in 18 cases(60.0%)but decreased in 12 cases(40.0%). Among 15 cases with a study of the half life of plasma iron disappearance, the half life was shortened in 2 cases (13.3%), lengthened in 5 cases(33.3%)and normal in 8 cases(53.3%). There was no correlation between the degree of splenomegaly and the level of bone marrow hemosiderin. However, as the spleen became larger, the level of bone marrow hemosiderin tended to decrease. In 9 cases, there was an occurrence of blast crisis. The level of bone marrow hemosiderin was decreased in 3(33.3%)of the 9 cases, normal in 4 of the cases(44.4 %) while slightly increased in the other 2 cases(22.2%). The level of serum ferritin was normal in 6 of the 9 cases(66.7%)and increased in 3 cases(33.3%). The level of serum ferritin was below normal range in 5 out of 9 cases(55.6%) and within normal limits in the other 4(44.4%). The chronic granulocytic leukemia patients had a tendency to have a decreased level of bone marrow hemosiderin while the patients with blast crisis showed a tendencey to have an inceased level of bone marrow hemosiderin.
대형 보일러 와이어로프 노내비계 및 인양시스템에 관한 연구
하승우(Seung Woo HA),이태호(Tae Ho Lee),이해승(Hae Seung Lee),김정민(Jeung Min Kim),전상욱(Sang Wook Jeon),조선영(Sun Young Cho) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
For the stable supply of electricity, the boiler of large-sized coal-fired power plants are being operated in very poor conditions such as continuous operation in high temperature and high pressure condition or repeating of start-up and shutdown. So, it is essentially required to perform periodic inspection and maintenance on them to secure their reliability. In particular, a lot of works are performed in the boiler furnace during preventive maintenance period to prevent the problems expected in the operation, and the most important consideration for this time is the securing of safety for the workers to pursue effective workability. Existing scaffolding systems are assembled in stacking up manner with base foundation in the lower ground, which causes the load concentration in the lower part. So, if there are some problems in the members, the scaffolding system will eventually collapse. So, in this study, safe furnace scaffolding system is to be developed by dispersing the load in the upper part, as well as minimizing the hazard of serial collapsing. Also, for the cases where direct installation of wire-rope type furnace scaffolding is challenging due to the structure of the boiler tube, the lifting system for the installation of furnace scaffolding is to be developed so that the wire-rope type furnace scaffolding can be supported to secure the integrity of the power generating facilities. The scaffolding system to be developed in this study allows partial disassembling and installation while maintaining safety for even the interfered parts when maintaining and replacing the large-sized components such as the tube panel and water wall by the benefit of the characteristics of the upper-supporting system which contributes to the time saving and easy maintenance of the workers. The design on the scaffolding system for this study was performed by comparing and analyzing the steel-frame structures of the boiler upper part and inner tube structures with their drawings. Also, stress analysis, structural analysis as a complete assembly, performance for the members, and mock-up test were performed simultaneously to secure safety, as well as apply the scaffolding system to 500㎿ supercritical coal-fired power plants successfully.
인슐린 - 비의존성 당뇨병환자에서 최대운동부하검사에 의한 심폐적성 및 에너지대사능의 평가
김신우(Shin Woo Kim),강문수(Moon Soo Kang),김수동(Su Dong Kim),김정국(Jung Guk Kim),하승우(Sung Woo Ha),김보완(Bo Wan Kim),석준(Jun Suk),박희명(Hi Myung Park),김유문(Yu Moon Kim),김종석(Jong Suk Kim) 대한내과학회 1995 대한내과학회지 Vol.49 No.1
N/A Objectives : The cardiorespiratory fitness including maximal oxygen uptake(VO, max) in diabetics is generally known to be low, but it is also reported to vary depending upon the type of diabetes mellitus and presence or absence of complicating coronary heart disease and/or cardiovascular autonomic dysfunctions. The purpose of our study is to assess cardiorespiratory fitness and energy metabolism at maximal exercise in non-insulin dependent diabetics without these complications. Methods : Symptom-limited maximal exercise tests by Bruce protocol were carried out in 28 non-insulin dependent diabetic men with neither clinical cardiopulmonary diseases nor cardiovascular autonomic dysfunctions and in 103 matched controls. Comparisons of HR max, VO2 max and their derivatives, and respiratory exchange ratio(RER) and energy expenditure(EE) were made between the diabetics and the controls. In addition, the correlations of RER and EE with the various body characteristics including age were computed. Results: The mean of various parameters reflecting cardiorespiratory responses to maximal exercise and indices of energy metabolism such as RER and EE showed no significant differences between the diabetics and the controls. However, the EE at maximal exercise in the diabetics was significantly inversely correlated with the age alone(r=-0.61, p<0.001), whereas in the controls, it showed a slight negative correlation with age(r= -0.37, p<0.01). Conclusion: These findings suggest that cardiorespiratory fitness level and energy metabolism at maximal exercise in non-insulin dependent diabetic men unaccompanying cardiovascular diseases and autonomic dysfunctions are essentially similar to the normal controls. Nonetheless, the fact that the EE at maximal exercise is highly correlated with the age in the diabetics may be of value to be considered in exercise prescription for these patients.