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醋酸에칠 存在下의 無水醋酸의 二分子加水分解 및 觸媒가 加水分解에 미치는 影響
鞠埰豪 서울대학교 1963 서울대학교 論文集 Vol.14 No.-
On the process of manufacturing acetic anhydride by means of oxidation of acetaldehyde with air, and distill off H₂O formed by azeotropic mixture with ethylacetate, author investigated the hydrolysis of acetic anhydride of above system, and catalysing hydrolysis. 1. Standard solution author chose is as follows for each single experiment. Acetic acid ............ 1/18 mole Acetic anhydride ....... 1/18 mole H₂O ................... 1/18 mole Ethylacetate ........... 6/18 mole The hydrolysis occurred Biomolecular, and the Velocity Coefficient was k₂=3.04×0^4 e^-12404/RT (S_xy=0.013) 2. Biomolecular velocity coefficient found at 60℃ about several kinds of metal acetate and several kinds of other catalyst. (Table 6) 3. ZnAc₂ catalysing has been found remarkably strong, its Velocity Coefficient being twice as big as that of standard solution at 70.4℃, Catalysnig effect of alkali metal Na^+, K^+ too, has been found considerably strong, other metal acetate showing some acceration of hydrolysis. NaAc catalyst k₂=7.29×10^4e^-12655/RT NaCl catalyst k₂=8.17×10^5e^-14490/RT ZnAc₂ catalyst k₂=3.24×10^6e^-15021/RT PbAc₂ catalyst k₂=1.53×10^5e^-13448/RT (Table 9)
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Jinsoo Ko,Sungbok Lee,Byungyun Kim,Cheho Seo 대한건축학회 2009 Architectural research Vol.11 No.2
The purpose of this study is to investigate the problem of crack repair materials and methods in existing concrete structure and to propose the effective injection method on crack repair by packer type. The result of this study is as follows. It is investigated that the crack width in the inner matrix of concrete structure is decreased about 30-40% than that in the surface of the concrete structure. Also it is showed that the possibility which could be monolithic with injection part became higher if the injection part is installed near to surface of concrete on the punching method to vertical direction against crack area. The injection of repair material can be poured smoothly under about 10N/㎟ pressure on the condition that cracks are monolithic with injection part without dust by drill. The method which is effective injection for a repair material is the punching method in compliance with coredrill. But, the research continuously is necessary about minimum injection pressure.
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Ko, Jinsoo,Lee, Sungbok,Kim, Byungyun,Seo, Cheho Architectural Institute of Korea 2009 Architectural research Vol.11 No.2
The purpose of this study is to investigate the problem of crack repair materials and methods in existing concrete structure and to propose the effective injection method on crack repair by packer type. The result of this study is as follows. It is investigated that the crack width in the inner matrix of concrete structure is decreased about 30-40% than that in the surface of the concrete structure. Also it is showed that the possibility which could be monolithic with injection part became higher if the injection part is installed near to surface of concrete on the punching method to vertical direction against crack area. The injection of repair material can be poured smoothly under about $10N/mm^2$ pressure on the condition that cracks are monolithic with injection part without dust by drill. The method which is effective injection for a repair material is the punching method in compliance with coredrill. But, the research continuously is necessary about minimum injection pressure.
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김상욱(Sangwook Kim),박보석(Boseok Park),장희진(Heejin Jang),김건우(Gunwoo Kim),박정현(Junghyun Park),임채호(Cheho Lim) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.2Ⅲ
미래의 정보전에서는 자신의 정보 시스템에 대한 침해 방지, 복구 등의 수동적인 형태의 보호뿐 아니라 상대방의 정보 하부 구조(Information Infrastructure)에 대한 공격같은 적극적인 형태의 보호가 요구된다. 기존의 시스템/네트워크 보안 도구만으로 앞으로의 정보전에 대비하는 것은 불가능하다. 그러므로 침입 탐지뿐 아니라 부정 행위자 신분 확인을 위한 구금, 미행 등의 진보된 해킹 방지 기술이 요구된다. 본 논문에서는 미행에 의한 부정 행위자 신분 확인 시스템을 제시한다. 신분 확인 시스템은 부정 행위자에 대한 신분정보를 생성, 유지함으로써 침해 사고를 예방하고 부정 행위자에 대한 역공격도 가능하게 한다. 또한 부정 행위자의 접속 경로에 따른 미행을 통하여 침입자의 행위를 실시간으로 분석, 보고함으로써 보다 정확한 신분 확인이 가능하다.
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