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고혈압성 심장에서 4 심음과 좌심실 근질량 및 승모판 혈류양상의 관계
정양호(Yang Ho Jung),김경중(Kyeong Joong Kim),허종(Jong Heo),노인환(In Whan Ro),박양규(Yang Kyu Park),정진원(Jin Won Jeong),박옥규(Ock Kyu Park) 대한내과학회 1989 대한내과학회지 Vol.37 No.6
N/A To determine the clinical significance of the fourth heart sound (S.) in hypertensive heart, 31 patients with essential hypertension aged between 32 to 77 years old and 15 normal controls were examined by physical examination, phonocardiography and echocardiography, All hypertensive patients had normal sinus rhythm and no history of coronary artery disease nor COPD and most of them had moderate to severe hypertension. Depending upon the presence of audible S4, hypertensive patients were divided into 3 groups; those without audible S, (group I, 15 cases), those with audible S, (group II, 12 cases) and those with questionably audible S, (group III, 4 cases). M-mode echocardiograms of the left ventricle and pulsed wave Doppler echocardiograms of the mitral valve were performed to determine the left ventricular thickness/dimension ratio (T/D), left ventricular mass index (LVMI) and A/E ratio of mitral flow pattern. T/D and LVMI were significantly increased in both hypertensive group I and group 11 (p<0.01) and T/D of hypertensive group II was more increased than that of hypertensive group I (p<0,05), but there was no significant difference between hypertensive group I and group II in LVMI. In contrast, the A/E ratio of mitral Doppler flow pattern was increased only in hypertensive group II compared to normal controls (p<0.01), and there was a significant difference between hypertensive group I and group II (p<0.01). Audible S, was found in hypertensive patients with an A/E ratio greater than 1.10 and in a normal person with an A/E ratio of 1.27, and all 10 hypertensive patients above an A/E ratio of 1.20 except one had an audible fourth heart sound. In conclusion, audible fourth heart sound is a useful bedside parameter for detecting left ventricular diastolic dysfunction in the hypertensive heart.
나용호(Yong Ho Nah),정양호(Yang Ho Jeong),손봉국(Bong Gook Shon),임종채(Jong Chae Lim) 대한소화기학회 1988 대한소화기학회지 Vol.20 No.1
N/A The aim of this study was to determine gastrointestinal manometric patterns of functional dyspepsia. We studied 10 healthy volunteers and 19 patients with functional dyspepsia during fasting and 2 hour after a 650-Kcal meal. This results showed: 1) Healthy subjects: During fasting, the migrating motor complex (MMC) was present in all subjects and at all levels of upper small intestine and propagated aborally. Migrating motor cornplex occurred each 103+32 min (grand mean for all loci), but intervals between MMC varied markedly (63-360). Rates of continuous, rhythmic contractions during activity fronts were 11.5+0.5 cpm and the duration of activity fronts was 7.0+3.6 min. The velocity of aboral migration was 11.2+5.7 cm/min. Eating disrupted the cycle of interdigestive motor activity at levels of the stomach and the upper gut. Progression of MMC was interrupted and a postcibal pattern of motility was established. This consisted of short bursts of irregular, randorn contractions, interspersed with transient periods of quiescence. 2. Functional dyspepsia: Manometric abnormalities were found in 12 patients (63%). In the upper intestine, unpropagated bursts of phasic and tonic contractile activity were a relatively frequent abnormalities (37%) but a number of other altered manometric patterns also were observed. In one patients, there were good corelation between manometric abnormalities and symptoms. Ive conclude that in patients with functional dyspepsia gastrointestinal manometry is a useful technique to evidence the underlying gut motor disturbance that is present in a relatively high proportion of these patients. This sudy suggests also that there are several subtypes of gastrointesti- nal motility in functional dyspepsia.
최광남,모운종,김익주,정양호,김민욱,Choe, Gwang-Nam,Mo, Un-Jong,Kim, Ik-Ju,Jeong, Yang-Ho,Kim, Min-Uk 국립문화재연구소 1986 保存科學硏究 Vol.7 No.-
The aim of this study is to scientifical conservation for the Sin An Ship. The test object is Pinus massoniana and Cunninghamia lanceolata of Sin An Ship's timber .Comtrast object is water soaked fresh wood of Pinus densiflora and Cryptomeria japonica The results were as follows.1. M. C is 280.9% in high degraded Planking board,237.5% in low degraded Planking board,158.6% in fresh wood of Pinus densiflora,222.6% in Bulkhead167.3% in fresh wood of Cryptomeria japonica2. Absorption rate of P.E.G is good at heating condition ($55∼60^{\circ}C$), especially in highdegraded wood.3. The dimensional change of wood during air drying is somewhat shrinked That's 7.22% in low degraded Planking board9.8% in high degraded Planking board and 4.11% in water soaked Pinus densiflora.4. The dimensional change of wood during P.E.G treatment is mostly swollen of wery small quantity.5. Salinity in desalinization tank showed below 50 p.p.m. It's indicate the end of desalinization treatment.6. Filtration with filter paper was possible up to 40% concentration only. Key words :M.c ; Moisture Content, Absorption rate, Dimension change, Salinity, Filtration.
용액법으로 제작된 ZnSnO 박막트랜지스터의 전극 물질에 따른 계면 접촉특성 연구
정영민,송근규,우규희,전태환,정양호,문주호,Jeong, Young-Min,Song, Keun-Kyu,Woo, Kyoo-Hee,Jun, Tae-Hwan,Jung, Yang-Ho,Moon, Joo-Ho 한국재료학회 2010 한국재료학회지 Vol.20 No.8
We studied the influence of different types of metal electrodes on the performance of solution-processed zinc tin oxide (ZTO) thin-film transistors. The ZTO thin-film was obtained by spin-coating the sol-gel solution made from zinc acetate and tin acetate dissolved in 2-methoxyethanol. Various metals, Al, Au, Ag and Cu, were used to make contacts with the solution-deposited ZTO layers by selective deposition through a metal shadow mask. Contact resistance between the metal electrode and the semiconductor was obtained by a transmission line method (TLM). The device based on an Al electrode exhibited superior performance as compared to those based on other metals. Kelvin probe force microscopy (KPFM) allowed us to measure the work function of the oxide semiconductor to understand the variation of the device performance as a function of the types metal electrode. The solution-processed ZTO contained nanopores that resulted from the burnout of the organic species during the annealing. This different surface structure associated with the solution-processed ZTO gave a rise to a different work function value as compared to the vacuum-deposited counterpart. More oxygen could be adsorbed on the nanoporous solution-processed ZTO with large accessible surface areas, which increased its work function. This observation explained why the solution-processed ZTO makes an ohmic contact with the Al electrode.