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新合成法에 依한 1,3,5,7-Terahydroxy anthraquinone 合成에 關한 硏究
李恭洙,梁厚琳,閔泰鎭 최신의학사 1973 最新醫學 Vol.16 No.8
Besides E. Noah's procedure to prepare 1, 3, 5, 7-tetrahydroxyanthraquinone, it was prepared directly by condensation reaction of two p-rosorcylic acids. Also 1, 3, 6, 8-tetrahydroxyanthraquinone was successfully prepared by condensation reaction of αrsorcylic acid and β-resorcylic acid.
신용태,이공수 崇實大學校 生産技術硏究所 1998 論文集 Vol.28 No.-
Because of the increase of the various mobile devices and teh demands of the users for mobility, present Internet IP cannot accept them. Mobile IP is the protocol that is made for supporting, mobile IP transmission of the data with its own IP address. Mobile IP all packets should always pass the HA(HomeAgent). For this reason unnecessary network overhead and packet delay can be made. Also it has long delivery routing during tranmission and can be tranmit, though non-optimized route, so route optimization in mobile IP is proposed and other protocol based on locality is proposed and implemented. To propose more efficient and reliable technique, we study the characteristics of MIP, ROMIP and LIMP. Especially we will observe the mobile characteristics of mobile node, and will give the differential service according to locality and speed of the mobility, i.e. with the fast mobility and slow mobility. When the mobility according to locality is big, because of congestion of traffic, we propose AROMIP which distribute traffic using duplicated RA(RepresntativeAgent).
李恭洙 최신의학사 1974 最新醫學 Vol.17 No.7
A modified Gerber's method for the estimation of fat content in milk was reported, in which the sulphuric acid was replaced by the detergent reagent consisting of 100mL of 45% sodium salicylate solution, 10m1. of Tween 80, and 5 drops of saturated solution of Sudan IV in amyl alcohol. The results obtained by the detergent method of Seoul milk are practically the same as those obtained by the Gerber's method. Furthermore, the accuracy of this method was compared with that of Gerber's method.
비정질 $(Ba, Sr)TiO_3$층의 도입을 통한 $(Ba, Sr)TiO_3$박막의 특성 향상
백수현,이공수,마재평,박치선 한국결정성장학회 1998 韓國結晶成長學會誌 Vol.8 No.2
$RuO_2$ 하부전극 상에 형성된 $(Ba, Sr)TiO_3$[BST] 박막의 물성을 향상시키기 위하여 비정질 BST층(30, 70nm)을 $RuO_2$와 BST사이에 증착하여 2중 BST구조를 형성시켰다. 비정질 BST층의 도입을 통해, BST박막의 평균 입도가 증가하고, 표면 거칠기가 감소하여 전체 BST 박막의 미세구조와 표면 mophology가 단일 BST박막에 비해 상당한 변화가 발생함을 확인하였다. 30nm의 비정질측이 적용된 BST박막의 경우, 하부기판의 영향으로부터 비교적 자유로운 미세구조를 갖는 BST 박막이 형성되었다. 2중 BST 박막의 경우 유전상수는 340, 누설전류는 $6.85{\times}10^{-7}A/{\textrm}{cm}^2$로서 비정질층을 갖지 않는 단일 BST 박막에 비하여(유전상수: 152, 누설전류: $1.25{\times}10^{-5}A/{\textrm}{cm}^2$)놀라운 전기적 특성의 향상이 이루어짐을 확인하였다. Amorphous (Ba, Sr)$TiO_3$[BST] layer(30, 70 nm) was introduced between crystalline BST and $RuO_2$electrode to realize double-layered BST structure in order to improve the properties of BST film. The structure and surface morphology of double-layered BST film were modified by the application of amorphous BST layer; that is, surface became smoother and grain size increased abruptly. Amorphous layer thicker than 30 nm was effective to hinder the influence of $RuO_2$surface on the structure of as-grown BST films by in-situ process. Dielectric constant of double-layered BST film was improved dramatically from 152 to 340 and leakage current was lowered from $1.25{\times}10^{-5}A/{\textrm}{cm}^2);to;6.85{\times}10^{-7}A/{\textrm}{cm}^2$, respectively.