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김창섭,임장섭,전영찬,정창모,Kim, Chang-Seop,Lim, Jang-Seop,Jeong, Chang-Mo,Jeon, Young-Chan 대한치과보철학회 1999 대한치과보철학회지 Vol.37 No.4
The purpose of this study is to evaluate the color differences that can exist between different brands of dentin porcelain having identical shade designations. The instrumental colorimetric technique was used to determine these differences. The three brands of dentin porcelain used were Vita VMK-68, Shofu Vintage, and Ceramco II. The three shades selected were the Vita Lumin shades A2, B2, and C2. The color difference values were compared with each other using $L^*,\;a^*,\;b^*$, three variables of the CIELAB color system, and ${\Delta}E$. The results of this study were as follows: 1 Corresponding shades of different brands of dentin porcelain produced different $L^*,\;a^*,\;b^*$ values. 2. The greatest ${\Delta}E$ value in corresponding shade was found to exist between Ceramco II and Shofu Vintage, followed by between Vita VMK-68 and Ceramco II, and then between Vita VMK-68 and Shofu Vintage. 3. The ${\Delta}E$ values in shade C2 were mainly influenced by ${\Delta}L^*$ value ; however none of ${\Delta}L^*,\;{\Delta}a^*,\;{\Delta}b^*$ values had greater influence on ${\Delta}E$ values than the others in shade A2, B2. 4. Shofu Vintage had the highest $b^*$ value, followed by Vita VMK-68, and then Ceramco II.
Special Column - 기후변화 대응을 위한 새로운 제안
김창섭,Kim, Chang-Seop 에너지절약전문기업협회 2010 esco Vol.64 No.-
최근 기후변화정책 수립과정 중인 배출권 할당 및 거래제도와 관련하여 부문별 책임할당에 대한 논의를 살펴볼 필요가 있다. 이는 적정한 기준과 원칙에 입각해 산업계에 대한 배출삭감에 대한 좁은 논의가 아닌, 산업 및 건물(가정상업), 수송부문의 적절한 책임배분에 대한 논의이다.