• 대한치과의사협회지
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• 제10권12호
• /
• pp.817-823
• /
• 1972

• 대한치과의사협회지
• /
• 제19권1호통권140호
• /
• pp.53-60
• /
• 1981

• 대한치과의사협회지
• /
• 제19권4호통권143호
• /
• pp.361-367
• /
• 1981

• 대한치과교정학회:학술대회논문집
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• 대한치과교정학회 1998년도 제31회 학술대회
• /
• pp.78.2-78.2
• /
• 1998

• 대한치과의사협회지
• /
• 제21권11호통권174호
• /
• pp.883-897
• /
• 1983

• Journal of Periodontal and Implant Science
• /
• 제12권1호
• /
• pp.50.2-50.2
• /
• 1982

• 대한핵의학회:학술대회논문집
• /
• 대한핵의학회 1971년도 제10차 학술대회
• /
• pp.86.2-86.2
• /
• 1971

• 한국분무공학회지
• /
• 제1권1호
• /
• pp.55-62
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• 1996

In a fuel injection engine, atomization of liquid fuel and mixture formation process has influenced(or affected) directly on the engine performance and pollutant emission. In this study, the characteristics of fuel spray and the behaviors of secondary atomization developed at the downstream of the valves were investigated using an image processing method. Solid and perforated valves are chosen in order to evaluate the valve performance in terns of air flow rate, valve opening angle and valve shape. Experimental results clearly indicate that the spray atomization quality can be improved by increasing the perforated rat io and the blockage rat io in the perforated valve, the characteristics of spray atomization is improved by using the perforated valve with high perforated rat io and blockage ratio.

• 센서학회지
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• 제26권2호
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• pp.135-140
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• 2017

In this paper, a novel measurement method of radial artery pulse waveform using robotic applanation tonometry (RAT) was present to reduce the errors by the pressing direction of the vessel. The RAT consisted of an array of pressure sensors and 2-axis tilt sensor, which was attached to the universal joint with a linear spring and five-DOF robotic manipulator with a one-axis force sensor. Using the RAT mechanism, the pulse sensor could be manipulated to perpendicularly pressurize the radial artery. A pilot experimental result showed that the proposed mechanism could find the optimal pressurization angles of the pulse sensor within ${\pm}3^{\circ}$standard deviations. Coefficient values of variation of maximum pulse peaks extracted from the pulse waveforms were 4.692, 6.994, and 11.039 % for three channels with the highest magnitudes. It is expected that the proposed method can be helpful to develop more precise tonometry system measuring the pulse waveform on the radial artery.

• Biomolecules & Therapeutics
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• 제5권3호
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• pp.299-305
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• 1997

In order to investigate the pharmacological properties of ι-muscone, effects of ι-muscone and musk were studied on the cardiovascular system with various experimental models. In isolated rat aorta, ι-muscone and musk made the relaxation of blood vessels in maximum contractile response to phenylephrine (10$^{-6}$ M) in endothelium-containing rings of the rat aorta, but not in endothelium-denuded rings. However, ι-muscone and musk in the presence of the inhibitor of NO synthase and guanylate cyclase did not make the relaxation of blood vessels. In spontaneously hypertensive rats (SHRs), ι-muscone and musk slightly reduced blood pressure but significantly decreased heart rate. In the isolated perfused rat hearts, ι-muscone and musk did not affect significantly on LVDP, contractile force, coronary flow and (-dp/dt)/(+dp/dt). These results suggest that ι-muscone and musk have weak cardiovascular effects with relaxation of blood vessel and decrease of heart rate, but without significant cardiac functions.