• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1409-1410
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• 2013

• Proceedings of the Korean Nuclear Society Conference
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• 2004.10a
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• pp.469-470
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• 2004

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.1367-1368
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• 2010

• Proceedings of the KIEE Conference
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• 1998.07f
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• pp.1879-1881
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• 1998

The conducted differential mode (DM) EMI in a flyback converter are analyzed. Circuit modeling of passive components and PCB pattern for the EMI simulation are presented. Using the model, high frequency noise path is analyzed. The analyses are verified with simulations by identifying the peakings of the EMI pattern.

• Proceedings of the Korean Nuclear Society Conference
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• 2005.05a
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• pp.663-664
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• 2005

• Nuclear Engineering and Technology
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• v.52 no.2
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• pp.448-455
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• 2020

The H.B. Robinson Unit 2 (HBR-2) pressure vessel dosimetry benchmark is an in- and ex-Reactor Pressure Vessel (RPV) neutron dosimetry benchmark based on experimental data from the HBR-2 reactor, a 2300-MW PWR designed by Westinghouse and put in operation in March 1971, openly available through the SINBAD Database at OECD/NEA data Bank. The goals of the present work were to carry out three-dimensional (3D) fixed source transport calculations in both Cartesian (X,Y,Z) and cylindrical (R,θ,Z) geometries by using the TORT-3.2 discrete ordinates code on very detailed 3D HBR-2 geometrical models and to test the latest broad-group coupled (47 neutron groups + 20 photon groups) working cross section libraries in FIDO-ANISN format with same structure as BUGLE-96, such as BUGJEFF311.BOLIB, BUGENDF70.BOLIB and BUGLE-B7. The results obtained with all the cited libraries were satisfactory and are here reported and compared.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.449-450
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• 2012

• Journal of the Korean Institute of Gas
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• v.6 no.4 s.18
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• pp.47-52
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• 2002

Analytical studies have been performed to investigate the strength of the membrane and the reaction force at the anchor point. Using nonlinear FEM code and experiments, the stress analysis of the corrugated membrane related the cryogenic liquid pressure and thermal loading is performed to ensure the stability and fatigue strength of the membrane. This paper reports on the FEM results of membrane.

• The Korean Journal of Pesticide Science
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• v.6 no.3
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• pp.218-223
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• 2002

The rate of hydrolysis of insecticide, O,O-diethyl-O-(1-phenyl-3-trifluoromethylpyrazol-5-yl)phosphorothioate (Flupyrazofos) have been investigated in 25% (v/v) aqueous dioxane (${\mu}=0.1M$) at $45^{\circ}C$. The hydrolysis mechanism of flupyrazofos proceeds through the specific acid ($A_{AC}2$) catalysis below pH 4.0, specific base ($B_{AC}2$) catalysis above pH 11.0 and general acid & base ($B_{AC}2$) catalysis between pH 5.0 and pH 10.0 via trigonal-bipyramidal ($d^2sp^3$) intermediate as evidence by solvent effect ($|m|{\ll}|{\ell}|$), rate equation ($kt=ko+k_H+ [H_3O^+]+k_{OH}[OH^-]$) and product analysis. The half-life ($T\frac{1}{2}$) of hydrolytic degradation in neutral media at $45^{\circ}C$ was ca. 3 months.

• Journal of the Korean Society of Food Science and Nutrition
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• v.42 no.4
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• pp.621-626
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• 2013

This study compared and analyzed the quality characteristics of five different apple juice concentrates (A~E) after alcoholic fermentation to establish test indicators for their defects. From our results, the titratable acidity was nearly similar in all diluted solutions. However, A and D showed a high pH of above 4.0 while B, C and E exhibited a low pH of below 3.0. In terms of free sugar content, maltose was undetected in A and D. In contrast, about 698 mg% maltose was found in C and more than 1,000 mg% maltose were detected in B and E. Malic acid, one of the main organic acids in apple, was measured at a high value of about 600 mg% in A and D and about 50 mg% in B, C and E. Potassium, one of the main minerals, was about 180 mg% in A and D, whereas a small amount of potassium, ranging between 6~9 mg% were present in B, C and E. Preservative (by sorbic acid) was not detected at all in all apple juice concentrates (A~E). When the above diluted apple concentrates were fermented, the alcohol contents were 11.2% and 10.8% in DAFB and AAFB, respectively. Alcoholic fermentation almost did not take place in BAFB, CAFB and EAFB. The use of maltose as the yeast may have influenced the fermentation. However, B, C and E were thought to be either defective or contaminated apple concentrates based on the analysis results of free sugar and organic acid.