• Journal of Information Technology Services
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• v.2 no.2
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• pp.39-51
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• 2003

The Internet affects all economic activities. Physical world business must either adopt new digital strategies, launch new digital business to complement their physical world models, or be forced to completely revise their strategies. The purpose of this paper is to provide a framework that organizes the managerial decision-making process to assist managers in crafting and implementing e-business strategy. We applied the methodology to the case of KNK Educational Institute to explain the process. Core competence of KNK JUNIOR is researched according to our suggested methodology and activities and roles of KNK JUNIOR have been arranged.

• Journal of Ceramic Processing Research
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• v.13 no.spc2
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• pp.174-176
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• 2012

Piezoelectric 0.93(Na0.5K0.5)NbO3-0.07BiTiO3 (NKN-BTO) ceramics were fabricated by the mixed-oxide method and their structural and dielectric properties was investigated with the variation of sintering temperature. All specimens were crystallized in the perovskite single phase without any formation of a second phase such as pyrochlore. The average grain size of the NKN-BTO specimen sintered at 1130 ℃ is 0.32 ㎛. The specimen sintered at 1100 ℃ showed the highest relative density of 98%. Electromechanical coupling factor, relative dielectric constant and dielectric loss of the NKN-BTO specimens sintered at 1110 ℃ were 0.31, 1222 and 0.02, respectively. Curie temperature of the specimen sintered at 1110 ℃ was 445 ℃.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.39 no.4
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• pp.337-345
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• 2013

In this study, the antioxidative effects of Aronia melanocarpa fruit and leaf extracts were investigated. The free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activities ($FSC_{50}$) of the ethylacetate and aglycone fractions of fruit extracts were 16.29 ${\mu}g/mL$, and 12.29 ${\mu}g/mL$, respectively. The free radical scavenging activity of fruit extract was higher than that of leaf extracts. Reactive oxygen species (ROS) scavenging activities ($OSC_{50}$) of the ethylacetate and aglycone fractions of fruit extracts on ROS generated in $Fe^{3+}-EDTA/H_2O_2$ system using the luminol-dependent chemiluminescence assay showed 2.86 ${\mu}g/mL$, and 1.80 ${\mu}g/mL$, respectively. ROS scavenging activity of the aglycone fraction of fruit extracts was similar to that of L-ascorbic acid (1.50 ${\mu}g/mL$). The ROS scavenging activity of fruit extracts was higher than that of leaf extracts. The cellular protective effects of aglycone fraction of fruit extracts (${\tau}_{50}$ = 72.3 min) on the $^1O_2$-induced cellular damage of human erythrocytes especially were increased in a concentration dependent manner (5 ~ 50 ${\mu}g/mL$). ${\tau}_{50}$ (72.3 min) of the aglycone fraction showed 1.9 times higher than (+)-${\alpha}$-tocopherol (38 min), known as lipophilic antioxidant at 10 ${\mu}g/mL$. These results incidicate that A. melanocarpa fruit extracts have higher antioxidant effects than leaf extracts and could be applicable to functional cosmetics materials for antioxidants by protecting skin exposed to solar UV radiation against ROS including $^1O_2$.