• Korean journal of food and cookery science
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• v.30 no.2
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• pp.183-192
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• 2014

This study was conducted to investigate the effect of superheated steam (SHS) on the improvement of quality during the manufacturing process of Samgyetang products. SHS cooking showed the increase in moisture content and the decrease in protein. In terms of chromaticity, the value of L was significantly higher in the $2^{nd}$ SHS cooking compared to conventional cooking. As for texture, the hardness decreased in Samgyetang with SHS cooking than conventional cooking. According to the results of the safety experiment with a 14-day refrigerations storage the total number of bacteria was lower in the SHS cooking compared to conventional cooking. The TBA value increased to 0.59-5.70 mg MD/kg after 15 days; VBN values were also 0.70-4.54 mg% in SHS cooking indicating a slight decomposition. Overall, it was found that SHS cooking and HHP were more preferred and also had an effect of reducing microorganisms, which were improvements in product quality and sanitation.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.5 no.4
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• pp.386-393
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• 1995

A Abstract Producing process of FGM by SHS process has been investigated and $TiB_2$/Cu based FGM was fabricated by the process. When raw material powders were stacked on, Cu substrate, composition profile can be graded. This stacked body was compressed and vacuum­s sealed into the capsule for the synthesis. This sample was ignited and compressed under high h hydro - pressure. By the observation of the crystal phases and microstructures of produced $TiB_2$/Cu FGM samples, the compositional gradient was able to be identified.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2002.05a
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• pp.155-158
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• 2002

Fabrication process of metal/intermetallic laminated composites by using self-propagating high temperature synthesis(SHS) reactions between Ni and Al elemental metal foils have been investigated. Al foils were sandwiched between Ni foils and heated in a vacuum hot press to the melting point of aluminium. SHS reaction kinetics was thermodynamically analyzed through the final volume fraction of the unreacted Al related with the initial thickness ratio of Ni:Al and diffusion bonding stage before SHS reaction. Thermal aging of laminated composites resulted in the formation of functionally gradient series of intermetallic phases. Microstructure showed that the main phases of intermetallics were NiAl and $Ni_3Al$ having higher strength at room and high temperatures. The volume fractions of intermetallic phases were measured as 82.4, 58.6, 38.4% in 1:1, 2:1, 4:1 initial thickness ratio of Ni:Al.

• Korean Journal of Metals and Materials
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• v.47 no.6
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• pp.338-343
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• 2009

The purpose of this study is to make the tantalum powder for solid electrolyte capacitor with SHS (self-propagating high-temperature synthesis) process. Raw materials for manufacturing Ta powder were used $Ta_{2}O_{5}$, Mg and NaCl. While progressing SHS process, $Ta_{2}O_{5}$ powder was reduced by Mg powder. The combustion temperature and velocity were easily controled by the varying mole ratio of NaCl, Mg and initial reaction pressure. In the case of only using NaCl as an inorganic agent, the shape is unagglomerated and has high surface area. whereas we were given the powder which has good net structure by the addition of excessive Mg as a diluent.

• Journal of the Speleological Society of Korea
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• no.76
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• pp.31-36
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• 2006

Self propagating High temperature Synthesised (SHS) ceramics have been widely used for various electronic applications. The investigation on SHS materials has been reported. The purposes of this study were as follows: fabricating the high temperature functional materials, and evaluating crystal structure and electrical properties. The regularities and peculiarities in SHS structures of high temperature materials as a result of the molecular interactions during burning process are considered.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.07a
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• pp.399-400
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• 2005

Self-propagating High-temperature Synthesised (SHS) ceramics have been widely used for various electronic applications. The investigation on SHS materials has been reported. The purposes of this study were as follows: fabricating the high-temperature functional materials, and evaluating crystal structure and electrical properties. The regularities and peculiarities in SHS structures of high-temperature materials as a result of the molecular interactions during burning process are considered.

• Journal of Science and Technology Studies
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• v.9 no.1
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• pp.57-87
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• 2009

Sick House Syndrome(SHS) is the environmental health problem which is difficult to clarify a causal relationship and a responsibility. This paper is focused on a National Environmental Dispute Resolution Commission(NEDRC)'s judgment on SHS and the process of the change of knowledge and policies related to SHS. In the process of the resolving the SHS dispute, NEDRC functioned as a boundary organization, which helps stabilize the boundary between science and policy, and provides space of mutual collaboration and produces boundary objects. NEDRC had necessary characteristics and resources to make scientific knowledge and policies of SHS. First, it was important for SHS to define a problem clearly and to justify the related information whereupon legal authority was effective. In addition, for the procedure of deciding polities, the role of the Ministry of Environment(ME) was essential. However, due to the condition of ME, the discussion of SHS had been limited to the scope of dispute, excluding scientific discussion.

• Food Science and Preservation
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• v.24 no.5
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• pp.593-599
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• 2017

The objective of this study was to investigate the effect of superheated steam (SHS) and high hydrostatic pressure (HHP) techniques on the improvement of the quality of Bulgogi product during manufacturing process. Bulgogi product was treated with four different cooking/treatment process: conventional cooking (CC), SHS cooking (SHS), CC and then HHP cooking (CC-HHP), and SHS and HHP cooking (SHS-HHP) samples. SHS treated product increased moisture content, and decreased crude protein. Additionally, hardness, gumminess and shear force values were significantly different among the samples (p<0.05). In safety experiment after 14 days of storage at refrigeration temperature indicated that the bacterial population was lower in the case of SHS-HHP as compared to CC-HHP. Changes in texture during the storage periods at $10^{\circ}C$ for SHS-HHP was lowest values with compared to the initial, while shear force values for both tended to decrease with increasing storage period. The TBA and VBN values for SHS-HHP increased to 0.48 ($5^{\circ}C$)-1.68 ($10^{\circ}C$) mg MD/kg and 25.14 ($5^{\circ}C$)-45.14 ($10^{\circ}C$) mg%, respectively after 15 days of storage. Overall, it was found that the combination of SHS and HHP reduced microbial growth, thus leading to improved product quality and sanitation.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.4
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• pp.625-628
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• 2008

Ba-Zn ferrite powders for electromagnetic insulator were synthesized by self-propagating high-temperature synthesis(SHS) with a reaction of $xBaO_2+(1-x)ZnO+0.5Fe_2O_3+Fe{\rightarrow}Ba_xZn_{1-x}Fe_2O_4$. In this study, phase indentification of SHS products was carried out by using x-ray diffractometry and quasi-nano sized Ba-Zn powders were prepared by a pulverizing process. SHS mechanism was studied by thermodynamical analysis about oxidation reaction among $BaO_2,\;ZnO,\;Fe_2O_3$, and Fe. As oxygen pressure increases from 0.25 MPa to 1.0 MPa, the SHS reactions occur well and make clearly the SHS products. X-ray analysis shows that final SHS products formed with the ratio of $BaO_2/ZnO$ of 0.25, 1.0 and 4.0, are mainly $Ba_xZn_{1-x}Fe_2O_4$. Based on thermodynamical evaluation, the heat of formation increases in the order of $ZnFe_2O_4,\;BaFe_2O_4$, and $Ba_xZn_{1-x}Fe_2O_4$. This supports that $Ba_xZn_{1-x}Fe_2O_4$ phase is predominately formed during SHS reaction. The SHS reactions to form $Ba_xZn_{1-x}Fe_2O_4$ depends on oxygen partial pressure, and the heat of formation during the SHS reaction. The SHS reactions tends to occur well with increasing the oxygen partial pressure and BaO2/ZnO ratio in the reactants This means that the SHS reaction for the formation of Ba-Zn ferrite includes the reduction of BaO2/ZnO and the oxidation of Fe. $Ba_xZn_{1-x}Fe_2O_4$ powders after pulverizing is agglomeratedwith a size of about $50{\mu}m$, in which quasi-nano sized particles with about 300nm are present.

• Proceedings of the Materials Research Society of Korea Conference
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• 2003.03a
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• pp.188-188
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• 2003