• Title/Summary/Keyword: D.B.H. analysis

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Analysis of Conducted Differential Mode EMI in Flyback Converter (플라이백 컨버터의 Differential Mode 전도전자파장해 분석)

  • Min, S.H.;Lee, D.Y.;Cho, B.H.;Lee, B.H.
    • 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.

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H.B. Robinson-2 pressure vessel dosimetry benchmark: Deterministic three-dimensional analysis with the TORT transport code

  • Orsi, Roberto
    • 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.

The FEM Analysis of Membrane for LNG Storage Tank (LNG 저장탱크용 멤브레인 개발을 위한 유한요소해석)

  • Oh B.T.;Hong S.H.;Yoon I.S.;Kim Y.K.;Seo H.S.
    • 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.

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Kinetics and hydrolysis mechanism of insecticide O,O-diethyl-O-(1-phenyl-3-trifluoromethylpyrazol-5-yl)phosphorothioate (Flupyrazofos) (살충제 O,O-diethyl-O-(1-phenyl-3-trifluoromethylpyrazol-5-yl)-phosphorothioate(Flupyrazofos)의 가수분해 반응 메커니즘)

  • Sung, Nack-Do
    • 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.

Body Types of Adult Males in the Ningbo Area of Zhejiang Province in China (중국(中國) 절강성(浙江省) 영파지역(寧波地域) 남성(男性)의 체형연구(體形硏究))

  • Shim, Boo-Ja
    • Journal of Fashion Business
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    • v.11 no.1
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    • pp.108-124
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    • 2007
  • Body measurement was held for the subjects of Chinese adult males in their 20s through 40s residing in the Ningbo area of Zhejiang Province in order to provide body type information and raise the fit of clothing products for the advancement into the Chinese market. The following sums up the analysis of body types based on body measurement: 1. Seven factors to compose body types were produced from the analysis of males in their 20s, explaining 76.07% of variables and representing 3 types according to cluster analysis. Type 1 was H-b and appeared as much as 32.14%. Type 2, semi X-d, was 40.81%, while Type 3, A-i, had 27.04%. 2. Eight body type composing factors were extracted from the analysis of men in their 30s and 40s. The factors explained 76.77% of all the variables and represented 4 types according to cluster analysis. Type 1, H-d, had the appearance rate of 18.47%; Type 2, H-b, 40.84%; Type 3, Y-i, 27.71%; and Type 4, semi X-s, 11.95%.