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Jogaejeot, seasoned Venerupis philippinarum, is a traditional Korean fermented food, and hepatitis A virus (HAV) can be transmitted through contaminated food, especially bivalve shellfish, causing acute gastroenteritis worldwide. Here, we carried out a phylogenetic analysis to identify and characterize HAV strains in jogaejeot samples associated with hepatitis A (HA) outbreaks in Seoul, South Korea,...
We have previously reported in vivo biosynthesis of 2-hydroxyacid containing polyesters including polylactic acid (PLA), poly(3-hydroxybutyrate-co-lactate) [P(3HB-co-LA)], and poly(3-hydroxybutyrate-co-2-hydroxybutyrate-co-lactate) [P(3HB-co-2HB-co-LA)] employing metabolically engineered Escherichia coli strains by the introduction of evolved Clostridium propionicum propionyl-CoA transferase (Pct...
The electromagnetic forces acting upon the transformer windings are calculated by numerical analysis in this paper. The electromagnetic forces consisting of radial and axial directions induce the injurious mechanical stress to windings as well as transformer itself. 3-Dimensional power transformer model by finite element analysis is considered to calculate the electromagnetic forces. The magnetic...
This paper describes the coupled magneto-thermal analysis technique to calculate the temperature rise in the gas insulated switchgear (GIS) bus bar. Harmonic eddy current analysis is carried out and the power losses are calculated in the conductor and shield tank. Two methods are presented to analyze the temperature distribution on the conductor and tank surface. The one is to solve the thermal conduction...
The trends in ecosystem and dynamics of semiconductor SoC industry in Korea are described in this paper. For the past years, the development of SoC (System on Chip) fabless industries has been phenomenal in that the total revenue of fabless companies became remarkably high and a number of major players of which the sales is about $200 million are emerging in Korea. It was mainly on the basis of multimedia...
This paper presents the temperature distribution of power transformer by coupled magneto-fluid-thermal analysis. Heat sources are calculated by magnetic field analysis. Temperature distribution is obtained by computational fluid dynamics algorithm considering the natural convection. The predicted temperature distribution of power transformer model shows good agreement with the experimental data
This paper presents the performance prediction technique of a disconnecting switch in case of short circuit current conduction. The thermal characteristics caused by the applied force to the contacts and contact resistance are analyzed by solving a coupled electrical-mechanical-thermal problem
A specially designed R-SOA with high gain and wider modulation bandwidth is introduced. The injection power requirement and the viable temperature range are experimentally analysed in 16 times 1.25 Gbit/s WDM-PON based on ASE-injected R-SOAs
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