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- 저자 : 박수현 ( S. H. Park ) (검색결과 56 건)
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Ag(001)에 성장된 NiO 극초박막의 화학 결함 연구
양설운,성시진,김재성,황한나,황찬국,장영준,박수현,민항기,Yang, Seol-Un,Seong, Shi-Jin,Kim, J.S.,Hwang, Han-Na,Hwang, C.C.,Chang, Young J.,Park, Soo-Hyon,Min, H.G. 한국진공학회 2007 Applied Science and Convergence Technology Vol.16 No.5
We have researched the chemical defects of NiO ultrathin films grown on Ag(001) by x-ray photoelectron spectroscopy. In particular, O 1s and Ni 2p spectra were analyzed consistently with control film thickness, $O_2\;and\;H_2O$ partial pressure and substrate temperature. As a result, we could identify each chemical defect. In addition, we suggest the optimum growth condition to minimize the defect density.
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규칙적인 운동을 통한 심폐체력의 향상이 비만 청소년의 혈관기능에 미치는 영향
박수현 ( S. H Park ),윤은선 ( E. S Yoon ),제세영 ( S. Y Jae ) 한국운동생리학회 2012 운동과학 Vol.21 No.4
Vascular endothelial dysfunction and increased arterial stiffness are associated with early atherosclerosis in obese adolescents. High cardiorespiratory fitness (CRF) is associated with diminished cardiovascular risk factors and improved vascular endothelial function in children. The purpose of the study was to examine effects of the improvement of cardiorespiratory fitness by regular exercise training on vascular function in obese adolescents. Twenty one obese adolescents (Schoolboy, Mean age:13-14 yr) were randomly assigned to an exercise training (ET)(12 weeks, 40 minutes, 5 days/week) group (n=11) and a non exercise control (CON) group (n=10). Cardiorespiratory fitness was measured using maximal oxygen uptake with metabolic gas analysis and body composition was determined by bioelectrical impedance. We measured carotid-femoral pulse wave velocity and reactive hyperemia index as indices of vascular function. Waist girth was significantly decreased in ET group than in CON group (ET 94.41±6.17 to 92.62±6.13 vs. CON 92.62±7.80 to 94.27±9.23 ㎝, p <.05). Cardiorespiratory fitness was significantly increased in ET group than CON group(ET 32.35±6.49 to 39.24±6.63 vs. CON 34.59±5.47 to 38.36±6.54 ㎖/㎏/min, p <.05). Body mass index and selected CVD risk factors were not improved in ET group. Reactive hyperemia index was significantly increased in ET group (ET 1.60±0.45 to 1.87±0.58 vs. CON 1.73±0.39to 1.43±0.26%, p =<.05) but carotid-femoral pulse wave velocity did not significantly decrease in ET group (ET 5.77±5.40 to 5.40±0.53 vs. CON 5.12±0.53 to 5.05±0.54 m/s, NS). Change in cardiorespiratory fitness was associated with change in reactive hyperemia index after adjusted for changes in waist (r=.457, p <.037). These results show that regular exercise training improved endothelial function, and this was associated with improved cardiorespiratory fitness independent of changes in body weight in obese adolescents.
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박수현(S. H. Park),임상헌(S. H. Lim),이춘만(C. M. Lee) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
High precision manufacturing of spherical lenses is required for the development of optical system and display industries. Over the past few decades, many studies have been focused on the manufacturing of the spherical lenses. Spherical center setting of the lens polishing machine is a big problem to obtain high precision lenses. This study has been focused on the development of the spherical center setting gage for a lens polishing machine. And also, measurement of spherical center and eccentricity is performed using the developed gauge. The result of the measurement of the lens polishing machine is provided for the manufacturing of the spherical lens which have good shape and surface finish.
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