• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2002.07a
• /
• pp.58-61
• /
• 2002

SBT thin films were etched at different content of Cl$_2$in Cl$_2$/Ar plasma. We obtained the maximum etch rate of 883 ${\AA}$/min at Cl$_2$(20%)/Ar(80%). As Cl$_2$ gas increased in Cl$_2$/Ar plasma, the etch rate decreased. The maximum etch rate may be explained by variation of volume density for Cl atoms and by the concurrence of two etching mechanisms such as physical sputtering and chemical reaction with formation of low-volatile products, which can be desorbed only by ion bombardment. The variation of volume density for Cl, F and Ar atoms and ion current density were measured by the optical emission spectroscopy and Langmuir probe. To evaluate the physical damage due to plasma, X-ray diffraction and atomic force microscopy analysis carried out. After etching process, P-E hysteresis loops were measured by ferroelectric workstation.

• Journal of Physiology & Pathology in Korean Medicine
• /
• v.26 no.6
• /
• pp.953-959
• /
• 2012

The purpose of this study is to report the hemostatic effects of Kungkwikyoae-tang for abnormal uterine bleeding. Kungkwikyoae-tang has been known as a useful herbal medication for uterine bleeding. We treated patients who had been suffering from abnormal uterine bleeding with herb-medication, acupuncture therapy, pharmacopuncture therapy and moxa therapy. We prescribed Kungkwikyoae-tang three times a day. The improvement of symptoms were measured by checking patient bleeding volume, frequency and other physical signs. After Kungkwikyoae-tang was given, abnormal uterine bleeding volume and frequency was reduced and other physical symptoms were improved. This case study shows that Kungkwikyoae-tang has a hemostatic effects against the abnormal uterine bleeding.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
• /
• v.11 no.2
• /
• pp.162-166
• /
• 1998

Synthetic fluid, class 7 group 2, as an insulating and cooling material is selected as. specimen, arid it is studied for the physical and electrical properties. Also, Benzotriazole(following as BT A) known as a suppressant of streaming electrification is added to it, and the change of physical and electrical properties by addition of BT A is investigated. From the spectrum of FT-IR, it is confirmed that the absorption peak in wavenumbers $3400{\sim}3450[cm^{-1}]$ is small or disappears when BTA is added. AC breakdown strength and volume resistivity of each specimen are investigated. It is considered that the effective content of BTA is about 10[ppm] for the suppression of electrification in this experiment.

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2006.09b
• /
• pp.1303-1304
• /
• 2006

The type, volume fraction, size, shape and arrangement of embedded particles influence the mechanical properties of the particle reinforced metal matrix composites. This presents the investigation of the SiC particle and porosity distributions in various aluminum matrix composites produced by cold- and hot-pressing. The microstructures were characterized by optical microscopy and stereological parameters. SiC and porosity volume fractions, and the anisotropy distribution function were measured to establish the influence of the consolidation method.

• Journal of International Academy of Physical Therapy Research
• /
• v.9 no.3
• /
• pp.1533-1536
• /
• 2018

The purpose of present study was to investigate the effect of kinesio taping on pulmonary function in stroke patients using manual wheelchairs. Twenty stroke patients were divided into a wood chair group (WCG, n=10), a wheelchairs group (WG, n=10), and a kinesio taping with wheelchairs group (KWG, n=10). Taping with wheelchairs group was applied kinesio taping on back muscles (vertical paraspinal strips and oblique strips). All three groups were trained in upright seated posture for 30 minutes. Pulmonary function tests were performed with forced expiratory volume in one second, forced vital capacity and peak expiratory flow as spirometer. There was a significant increase in forced expiratory volume in one second and forced vital capacity only in KWG. The results of this study demonstrate that kinesio taping has an immediate effect on the improvement of pulmonary function in stroke patients using manual wheelchairs.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 1997.04a
• /
• pp.257-260
• /
• 1997

In order to investigate the volume resistivity on the electrical properties of transformer oils, the Transformer oils contained BTA is prepared, which was classified by the contents of BTA, such as 1[ppm], 10[ppm], 20[ppm], 30[ppm], 50[ppm], respectively. To measure the physical properties of transformer oils contained BTA, Fourier Transform Infrared Spectroscopy is investigated. And for the study of electrical properties is made by measuring the volume resistivity of each specimen. As result of this experiments, it is confirmed that the volume resistivity characteristics of specimen contained BTA 10[ppm] is superior.

• Polymer(Korea)
• /
• v.24 no.2
• /
• pp.194-200
• /
• 2000

The diffusion coefficients in polyimide/N-methyl-2-pyrrolidone (NMP) systems were proposed using tile Vrentas-Duda's hole free volume theory. Several free volume parameters included in the diffusion coefficients were obtained from the fundamental physical properties of polyimide and NMP and group contribution theory, and the pre-exponential diffusion coefficient, D$_{0}$ was also determined from the dynamic swelling behavior of polyimide in NMP solution. The experimental swelling behavior of polyimide films in NMP was well described by the theoretical one using the proposed diffusion coefficient.t.

• Korean Journal of Computational Design and Engineering
• /
• v.13 no.6
• /
• pp.469-477
• /
• 2008

Physically-based rendering is an image synthesis technique based on simulation of physical interactions between light and surface materials. Since generated images are highly photorealistic, physically-based rendering has become an indispensable tool in advanced design visualization for manufacturing and architecture as well as in film VFX and animations. Especially, BRDF (bidirectional reflectance distribution function) is critical in realistic visualization of materials since it models how an incoming light is reflected on the surface in terms of intensity and outgoing angles. In this paper, we introduce techniques to represent BRDF as B-spline volumes and to utilize them in physically-based rendering. We show that B-spline volume BRDF (BVB) representation is suitable for measured BRDFs due to its compact size without quality loss in rendering. Moreover, various CAGD techniques can be applied to B-spline volume BRDFs for further controls such as refinement and blending.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 1996.05a
• /
• pp.211-215
• /
• 1996

In this paper, the volume resistivity of transformer oil is made researches so that the electrical properties for transformer oil is investigated. The specimen is produced by the irradiation of electron beam classified into the low dose, such as 0.5[Mrad], 1[Mrad], 2[Mrad]. The effect of electron team irradiation is studied by investigating the electrical properties of dielectric liquid due to the difference of electron beam dose. To measure the physical properties of transformer oil, courier Transform-Infrared Spectroscopy is investigated. And the study far the electrical properties is made by measuring the volume resistivity of each specimen. By means of the result from this experiments, it is introduced that the movement of carrier to contribute to the volume resistivity on the electrical properties.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 1996.11a
• /
• pp.203-206
• /
• 1996

In order to investigate the infulence of sodium chloride on the volume resistivity characteristics of transformer oils in temperature range of 20~100[$^{\circ}C$] were made researches. The geometrical capacitance of electrode with coaxial cylindrical shape for measuring the volume resistivity was 16[pF], and hoghmegaohm meter model VMG-1000 was used, the applying voltage were DC 100, 250, 500 and 1000[V]. The classification for the physical properties of specimen by FTIR Spectroscopy was carried out. AS a result of experiment, the value for volume resistivity is increased with sodium chloride contents.