• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.1037-1038
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• 2010

• Nuclear Engineering and Technology
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• v.52 no.6
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• pp.1164-1171
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• 2020

T-junction structures play an important role in nuclear power plant systems. Research on liquid entrainment is mostly based on small-scale branch pipes (d/D ≤ 0.2) and attention paid to large-scale branch pipes (0.33 < d/D < 1) is insufficient. Accordingly, this study implements a series of experiments on the liquid entrainment of T-junction with different angles (32.2°,47.9°,62.3°,90°) through a large-scale branch (d/D = 0.675). The onset liquid entrainment is related to the gas phase Froude number Fr_g, the dimensionless gas chamber height h_b/d and the branch pipe angle 𝜃. As Fr_g increases, h_b/d also rises. With a constant h_b/d, the onset liquid entrainment changes from droplets entrainment by the gas phase to that by the rising liquid film. The steady-state liquid entrainment is related to w_3g, h/d and 𝜃. With constant w_3g and h/d, the branch quality grows as the branch angle increases. With a certain h/d, the branch quality increases, as the w_3g number increases.

• Journal of Sasang Constitutional Medicine
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• v.27 no.3
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• pp.356-365
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• 2015

Objectives The aim of this study was to examine significant improvement of motor and non-motor symptoms after treatment with Sasang constitutional medicine treatment on a Soyangin patient with Parkinson disease having depression. Methods The patient was treated with Soyangin's constitutional medications treatment(herb and acupuncture) and scalp acupuncture. The progress was evaluated using the Global Assessment Scale (GAS scale), Hoehn and Yahr scale (H&Y scale) and Unified Parkinson disease rating scale (UPDRS) before and after treatment. These scales were used to assess the overall function of patient. Result We observed a significant improvement in patient's motor and non-motor symptoms using GAS scale, H&Y scale and UPDRS. The UPDRS scores decreased in Part I, Part II, Part III and Part IV. Conclusion This study shows that Sasang constitutional medicine treatment can be effective for Soyangin patient with Parkinson disease having depression.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.7 no.3
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• pp.48-53
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• 2011

A PHE (Process Heat Exchanger) is a key component required to transfer heat energy of $950^{\circ}C$ generated in a VHTR (Very High Temperature Reactor) to the chemical reaction that yields a large quantity of hydrogen. A small-scale PHE prototype made of Hastelloy-X is being tested in a small-scale gas loop at Korea Atomic Energy Research Institute. In this study, as a part of the evaluation on the high-temperature structural integrity of the small-scale PHE prototype, we carried out macroscopic high-temperature structural analysis of the small-scale PHE prototype under the gas loop test conditions considering the pipeline stiffness.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.19-20
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• 2013

• Proceedings of the Korean Vacuum Society Conference
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• 2000.02a
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• pp.162-162
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• 2000

We have studied magnetic properties of Co/Pt multilayered films which have attracted great interest as high-density magneto-optical (MO) recording media due to their good MO properties. For this study, [Pt(45 )/Co(35 )]$\times$8 films were deposited with a Pt buffer layer of 60 on Si(100) substrate by alternating electron-beam evaporation in a high vacuum and were ion beam mixed by using 80keV Ar+ at 25$0^{\circ}C$. Especially, an external magnetic field was added to help changing magnetic property during ion beam mixing (IBM). The intermixing of Co and Pt layers after IBM was confirmed with Rutherford Backscattering Spectroscopy (RBS) and Transmission Electron Microscopy (TEM). The MO property of the film was measured with magneto-optical Kerr spectrometer and the change of magnetic easy axis in the film plane was observed from Ker loop data. This anomalous result might be correlated with the change of atomic structure due to the intermixing effect.

• Journal of Oriental Medical Thermology
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• v.6 no.1
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• pp.16-22
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• 2008

Objective: The aims of this study are to find out proper methods to assess Bell's palsy with DITI and to validate the correlation between DITI of acupoints and H-B scale. Methods: 36 Bell's palsy patients and 10 health people were measured. We checked thermal differences between abnormal and normal acupoints sites measured by using DITI and H-B scale. Results: There was no significant thermal difference between abnormal and normal sites. The H-B scale was significantly correlated with thermal differences of ST6 and TE17. Conclusion: DITI was useful for evaluating the severity of Bell's palsy.

• Journal of Acupuncture Research
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• v.24 no.6
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• pp.105-111
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• 2007

Objectives : The aims of this study are to find out proper methods to assess Bell's palsy with DITI and to validate the correlation between DITI of acupoints and the H-B scale. Methods : 36 Bell's palsy patients and 10 healthy people were measured. We checked thermal differences between abnormal and normal acupoint sites measured by using DITI and the H-B scale. Results : There was no significant thermal difference between abnormal and normal sites. The H-B scale was significantly correlated with thermal differences between $ST_6$ and $TE_{17}$. Conclusions : DITI was useful for evaluating the severity of Bell's palsy.

• International Journal of Air-Conditioning and Refrigeration
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• v.9 no.2
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• pp.77-84
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• 2001

Experimental and computational studies were carried out to investigate the turbulent heat transfer enhancement of the cooling system in nuclear reactor by large scale vortex generation. The large scale vortex motion was generated by rearranging the inclination angels of mixing vanes to the coordinate direction. Axial development of mean and turbulent velocities in the subchannels were measured by the 2-color LDV system. Eddy diffusivity concept based on $\kappa{-}\varepsilon$ model was employed to calculate the turbulent heat and momentum transfers in the subchannel. The turbulences generated by split mixing vanes has small length scales so that they maintain only about $10D_H$ after the spacer grid. On the other hand, the turbulences generated by the large scale vortex motions continue longer and remain up to $25D_H$ after the spacer grid.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.11
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• pp.1004-1011
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• 2000

Experimental and computational studies were carried out to confirm the turbulent enhancement of the cooling system of nuclear reactor by large scale vortex generation in nuclear fuel bundle. The large scale vortex motions were generated by rearranging the inclination angles of mixing vanes to the coordinate directions. Axial development of mean and turbulent velocities in the subchannels were measured by the 2-color LDV system. Eddy diffusivity heat flux model and $k-varepsilon$ model were employed to analyze the turbulent heat and fluid flows in the subchannel. The turbulence generated by split mixing vanes has small length scales so that they maintain only about $10 D_H$ after the spacer grid. On the other hand, the turbulences generated by the large scale vortex continue more and remain up to $25 D_H$after the spacer gird.